CN107387714A - A kind of limited-slip differential assembly and main reducing gear - Google Patents
A kind of limited-slip differential assembly and main reducing gear Download PDFInfo
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- CN107387714A CN107387714A CN201710456603.6A CN201710456603A CN107387714A CN 107387714 A CN107387714 A CN 107387714A CN 201710456603 A CN201710456603 A CN 201710456603A CN 107387714 A CN107387714 A CN 107387714A
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- gear
- differential
- planetary gear
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- end cap
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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
- F16H48/11—Differential gearings with gears having orbital motion with orbital spur gears having intermeshing planet 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
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/22—Arrangements for suppressing or influencing the differential action, e.g. locking devices using friction clutches or brakes
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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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
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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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
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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
- F16H2048/385—Constructional details of the ring or crown gear
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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
- F16H57/04—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
- F16H57/0483—Axle or inter-axle differentials
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention provides a kind of limited-slip differential assembly and main reducing gear, the differential assembly includes：Spiral bevel gear, the spiral bevel gear are connected with differential mechanism right end cap, and the differential mechanism right end cap is connected with differential casing, and the differential casing is also connected with differential mechanism left end cap；Left planetary gear, the left planetary gear are arranged in the differential mechanism left end cap；Right planetary gear, the right planetary gear are arranged in the differential mechanism right end cap；Left half axle gear, the left half axle gear are arranged in the first gear mounting hole of described differential casing one end；Right axle shaft gear, the right axle shaft gear are arranged in the second gear mounting hole of the differential casing other end；First friction mechanism, first friction mechanism are arranged between the differential mechanism left end cap and the differential casing；Second friction mechanism, second friction mechanism are arranged between the differential mechanism right end cap and the differential casing.
Description
Technical field
The invention belongs to system of vehicle transmission technical field, more particularly to a kind of limited-slip differential assembly and main reducing gear.
Background technology
In vehicle drive system, power is typically to be transferred to each wheel respectively by differential assembly.Differential mechanism is
The device for allowing left and right wheelses to be rotated with friction speed.When vehicle is located at smooth road, on snowfield or ice face, tire due to
Frictional force is smaller and differential mechanism in skidding side axle shaft gear rotating speed to be faster than the side do not skidded, the fast wheel of rotating speed under the operating mode
It may rotate freely, thus substantial amounts of driving torque is changed into tyre slip, side of not skidding in addition can not obtain driving force,
Skidding region can not be travelled out by ultimately resulting in vehicle.
In the prior art to prevent wheel-slip, the limited slip differential used, including toothed differential gear box, Torsen differential
Device, friction disk type limited-slip differential etc..But above-mentioned differential mechanism is complicated, and limits sliding ability and be unsatisfactory for some heavily loaded high passes
The requirement on the property crossed chassis, such as certain special cross country chassis.
Based on this, the present invention provides a kind of limited-slip differential assembly and main reducing gear, of the prior art above-mentioned to solve
Problem.
The content of the invention
The problem of existing for prior art, the embodiments of the invention provide a kind of limited-slip differential assembly and main deceleration
Device, for solving, limited slip differential of the prior art is complicated and the technical problem of the sliding scarce capacity of limit.
The present invention provides a kind of limited-slip differential assembly, and the differential assembly includes：
Spiral bevel gear, the spiral bevel gear are connected with differential mechanism right end cap, the differential mechanism right end cap and differential mechanism
Housing is connected, and the differential casing is also connected with differential mechanism left end cap；
Left planetary gear, the left planetary gear are arranged in the differential mechanism left end cap；
Right planetary gear, the right planetary gear are arranged in the differential mechanism right end cap；
Left half axle gear, the left half axle gear are arranged in the first gear mounting hole of described differential casing one end；
Right axle shaft gear, the right axle shaft gear are arranged on the second gear mounting hole of the differential casing other end
In；
First friction mechanism, first friction mechanism be arranged on the differential mechanism left end cap and the differential casing it
Between；
Second friction mechanism, second friction mechanism be arranged on the differential mechanism right end cap and the differential casing it
Between；Wherein,
The left planetary gear and the planetary module in the right side are 2.5~3.5；The planetary tooth in a left side
Number is 6~8 with the planetary number of teeth in the right side；The left planetary gear and the planetary pressure angle in right side for 20~
30°；The left planetary gear is 30~45 ° with the planetary helical angle in the right side.
In such scheme, the left planetary gear includes：
First planetary gear, the second planetary gear, third planet gear and fourth planet gear；The right planetary gear bag
Include：Fifth line star gear, the 6th planetary gear, the 7th planetary gear and the 8th planetary gear；Wherein,
First planetary gear, second planetary gear, third planet gear and fourth planet gear are installed respectively
In the differential mechanism left end cap in corresponding planetary gear mounting hole；
The fifth line star gear, the 6th planetary gear, the 7th planetary gear and the 8th planetary gear are installed respectively
In the differential mechanism right end cap in corresponding planetary gear mounting hole.
In such scheme, first planetary gear engages with the fifth line star gear；Second planetary gear with
The 6th planetary gear engagement；The third planet gear engages with the 7th planetary gear；The fourth planet gear
Engaged with the 8th planetary gear；
The left half axle gear respectively with first planetary gear, second planetary gear, the third planet tooth
Wheel and fourth planet gear engagement；
The right axle shaft gear respectively with the fifth line star gear, the 6th planetary gear, the 7th planet tooth
Wheel and the 8th planetary gear engagement.
In such scheme, first friction mechanism includes：First lock ring, the first external friction disk, the first outside friction disc,
First inner attrition piece, the second outside friction disc, the second inner attrition piece, the 3rd outside friction disc and the 3rd inner attrition piece；Wherein,
First lock ring is slidably connected with the left half axle gear；
The first external friction disk, first outside friction disc, the first inner attrition piece, the second outside friction disc, rub in second
Pad, the 3rd outside friction disc and the 3rd inner attrition piece be sequentially arranged on successively first lock ring and the differential casing it
Between；
The first external friction disk, first outside friction disc, second outside friction disc and the 3rd outside friction disc
Accordingly install in the reserved flute profile mounting hole of the differential casing；
The involute spline of first inner attrition piece, second inner attrition piece and the 3rd inner attrition piece is and institute
State the first lock ring it is cylindrical on involute spline coordinate be connected.
In such scheme, second friction mechanism includes：Second lock ring, the second external friction disk, the 4th outside friction disc,
4th inner attrition piece, the 5th outside friction disc, the 5th inner attrition piece, the 6th outside friction disc and the 6th inner attrition piece；Wherein,
Second lock ring is connected with the right axle shaft gears slip；
The second external friction disk, the 4th outside friction disc, the 4th inner attrition piece, the 5th outside friction disc, rub in the 5th
Pad, the 6th outside friction disc and the 6th inner attrition piece be sequentially arranged on successively second lock ring and the differential casing it
Between；
The second external friction disk, the 4th outside friction disc, the 5th outside friction disc and the 6th outside friction disc
Accordingly install in the reserved flute profile mounting hole of the differential casing；
The involute spline of 4th inner attrition piece, the 5th inner attrition piece and the 6th inner attrition piece is and institute
State the second lock ring it is cylindrical on involute spline coordinate be connected.
In such scheme, lubrication oil-through hole and collection are provided with the differential mechanism left end cap and the differential mechanism right end cap
Oil sump.
In such scheme, the differential mechanism is parallel helical gear formula differential mechanism.
In such scheme, the left half axle gear, the right axle shaft gear and the differential casing are coaxial.
In such scheme, there is a drift angle between the left lateral star pinion mounting holes and the right lateral star pinion mounting holes.
The present invention also provides a kind of main reducing gear, and the main reducing gear includes any of the above-described described differential assembly.
The invention provides a kind of limited-slip differential assembly and main reducing gear, the differential assembly includes：Screw conic tooth
Wheel, the spiral bevel gear are connected with differential mechanism right end cap, and the differential mechanism right end cap is connected with differential casing, the differential
Device housing is also connected with differential mechanism left end cap；Left planetary gear, the left planetary gear are arranged in the differential mechanism left end cap；
Right planetary gear, the right planetary gear are arranged in the differential mechanism right end cap；Left half axle gear, the left half axle gear peace
In the first gear mounting hole of described differential casing one end；Right axle shaft gear, the right axle shaft gear are arranged on described
In the second gear mounting hole of the differential casing other end；First friction mechanism, first friction mechanism are arranged on the difference
Between fast device left end cap and the differential casing；Second friction mechanism, second friction mechanism are arranged on the differential mechanism
Between right end cap and the differential casing；Wherein, the left planetary gear and the planetary module in the right side are 2.5
~3.5；The planetary number of teeth in a left side is 6~8 with the planetary number of teeth in the right side；The left planetary gear and the right side
Planetary pressure angle is 20~30 °；The left planetary gear is 30~45 ° with the planetary helical angle in the right side；Such as
This, by rationally setting left planetary gear, right planetary gear, left half axle gear and the structural parameters and arrangement of right axle shaft gear；
When vehicle runs into the operating modes such as skidding, two wheels cause to pass to left and right half gear in the presence of torsion because of traction difference
Square is poor, and now differential mechanism can be according to difference in torque automatic sensing to differential；Left planetary gear and right planetary gear are around half axle gear
Also around own axes rotation while wheel axis revolves round the sun, now left planetary gear, right planetary gear, left half axle gear and right axle shaft
Axial force caused by gear engagement, so that producing larger moment of friction between each gear face；And axial force is passed
The first friction mechanism and the second friction mechanism are passed, the further restrictions planetary gear rotation of frictional force is produced between friction mechanism,
Internal friction torque is further generated, the limit for improving the differential mechanism slides ability.
Brief description of the drawings
Fig. 1 is the overall structure diagram for the limited-slip differential that the embodiment of the present invention one provides；
Fig. 2 is the partial structural diagram for the limited-slip differential that the embodiment of the present invention one provides；
Fig. 3 is structural representation when the left planetary gear that the embodiment of the present invention one provides engages with right planetary gear；
Fig. 4 is the structural representation for the first friction mechanism that the embodiment of the present invention one provides；
Fig. 5 is the structural representation for the second friction mechanism that the embodiment of the present invention one provides；
Fig. 6 is that schematic diagram is arranged in the radiating for the differential mechanism left end cap side that the embodiment of the present invention one provides；
Fig. 7 is that schematic diagram is arranged in the radiating for the differential mechanism left end cap opposite side that the embodiment of the present invention one provides；
Fig. 8 is the structural representation that the limited-slip differential that the embodiment of the present invention one provides is arranged on car body.
Embodiment
In order to complicated and the technology of sliding scarce capacity can not be limited ask for solving limited slip differential of the prior art
Topic, the invention provides a kind of limited-slip differential assembly main reducing gear, the differential assembly includes：Spiral bevel gear, it is described
Spiral bevel gear is connected with differential mechanism right end cap, and the differential mechanism right end cap is connected with differential casing, the differential casing
Also it is connected with differential mechanism left end cap；Left planetary gear, the left planetary gear are arranged in the differential mechanism left end cap；Right lateral star
Gear, the right planetary gear are arranged in the differential mechanism right end cap；Left half axle gear, the left half axle gear are arranged on institute
In the first gear mounting hole for stating differential casing one end；Right axle shaft gear, the right axle shaft gear are arranged on the differential mechanism
In the second gear mounting hole of the housing other end；First friction mechanism, it is left that first friction mechanism is arranged on the differential mechanism
Between end cap and the differential casing；Second friction mechanism, second friction mechanism are arranged on the differential mechanism right end cap
Between the differential casing；Wherein, the left planetary gear and the planetary module in the right side are 2.5~3.5；
The planetary number of teeth in a left side is 6~8 with the planetary number of teeth in the right side；The left planetary gear and the right lateral star tooth
The pressure angle of wheel is 20~30 °；The left planetary gear is 30~45 ° with the planetary helical angle in the right side.
Technical scheme is described in further detail below by drawings and the specific embodiments.
Embodiment one
The present embodiment provides a kind of limited-slip differential assembly, as shown in figure 1, the differential assembly includes：Screw conic tooth
Wheel 1, differential mechanism right end cap 2, differential casing 3, differential mechanism left end cap 4, left planetary gear 5, right planetary gear 6, left half axle tooth
Wheel 7, right axle shaft gear 8, the first friction mechanism 9, the second friction mechanism 10；Wherein,
The spiral bevel gear 1 is connected with differential mechanism right end cap 2 by the first connecting bolt 11, the differential mechanism right end cap
2 are connected by the second connecting bolt 12 with differential casing 3, and the differential mechanism is parallel helical gear formula differential mechanism, for example is held in the palm
Gloomy differential mechanism.
The differential casing 3 is also connected by the 3rd connecting bolt 13 with differential mechanism left end cap 4.The left planetary gear
5 are uniformly arranged in the differential mechanism left end cap 4；The right planetary gear 6 is uniformly arranged in the differential mechanism right end cap 2；
The left half axle gear 7 is arranged in the first gear mounting hole of described one end of differential casing 3, and the right axle shaft gear 8 is pacified
In the second gear mounting hole of the other end of differential casing 3, first friction mechanism 9 is arranged on the differential mechanism
Between left end cap 4 and the differential casing 3；Second friction mechanism 10 be arranged on the differential mechanism right end cap 2 with it is described
Between differential casing 3.Wherein, the left half axle gear 7, the right axle shaft gear 8 are coaxial with the differential casing 3.
Specifically, it is arranged on the left half axle gear 7 with the right planetary gear 6 referring to Fig. 2, the left planetary gear 5
Between the right axle shaft gear 8, the left planetary gear 5 includes：First planetary gear 21, the second planetary gear the 22, the 3rd
Planetary gear 23 and fourth planet gear 24；The right planetary gear 6 includes：Fifth line star gear 31, the 6th planetary gear 32,
7th planetary gear 33 and the 8th planetary gear 34；Wherein, referring to Fig. 3, the first planetary gear 21, the second planetary gear 22,
Three planetary gears 23 and fourth planet gear 24 are separately mounted in the differential mechanism left end cap 4 corresponding left planetary gear installation
Kong Zhong；Fifth line star gear 31, the 6th planetary gear 32, the 7th planetary gear 33 and the 8th planetary gear 34 are separately mounted to institute
State in differential mechanism right end cap 2 in corresponding right lateral star pinion mounting holes.
Also, first planetary gear 21 engages with the fifth line star gear 31；Second planetary gear 32 with
6th planetary gear 32 engages；The third planet gear 23 engages 33 with the 7th planetary gear；The fourth line
Star gear 24 engages with the 8th planetary gear 34.The left half axle gear 7 respectively with first planetary gear 21, described
Second planetary gear 22, the third planet gear 23 and the fourth planet gear 24 engage；The right axle shaft gear 8 is distinguished
With the fifth line star gear 31, the 6th planetary gear 32, the 7th planetary gear 33 and the 8th planetary gear
34 engagements.
Here, in order to meet that gear-driven engagement requires, each left lateral star pinion mounting holes and corresponding each right lateral star tooth
Drift angle is there are between wheel mounting hole, the angle of the drift angle determines according to planetary model.
In addition, in order to meet offroad vehicle high pulling torque (be at least 14000N*m), high rotating speed (being at least 4000r/min) and
The requirement of limited installation space, also need rationally to set the left planetary gear and the planetary parameters in the right side, such as
The left planetary gear and the planetary module in the right side are 2.5~3.5, it is therefore preferable to 3；The left side is planetary
The number of teeth is 6~8 with the planetary number of teeth in the right side, it is therefore preferable to 6；The left planetary gear and the planetary pressure in the right side
Power angle is 20~30 °, it is therefore preferable to 30 °；The left planetary gear is 30~45 ° with the planetary helical angle in the right side, excellent
Selection of land is 37.5 °；The number of teeth of left half axle gear and right axle shaft gear is all 18~20, it is therefore preferable to 18；Left planetary gear and the right side
Planetary number is 4 and distributing position etc., so could pass through left planetary gear and right lateral under slippery going operating mode
The rotation of star gear produces suitable axial force, so that each gear face produces larger moment of friction, therefore can be effective
Improve the sliding ability of differential mechanism itself limit.
In order to further improve the internal friction torque of differential assembly, it is additionally provided with the first friction mechanism 9 and second rubs
Wipe mechanism 10；Referring to Fig. 4, first friction mechanism 9 includes：First lock ring 41, the first external friction disk 42, the first external friction
Piece 43, the first inner attrition piece 44, the second outside friction disc 45, the second inner attrition piece 46, the 3rd outside friction disc 47 and the 3rd interior friction
Piece 48；Wherein,
First lock ring 41 is slidably connected with the left half axle gear 7；The first external friction disk 42, described first
Outside friction disc 43, the first inner attrition piece 44, the second outside friction disc 45, the second inner attrition piece 46, the 3rd outside friction disc 47 and the 3rd
Order is arranged between first lock ring and the differential casing 3 inner attrition piece 48 successively；The first external friction disk
42nd, the outside of first outside friction disc 43, second outside friction disc 45 and the 3rd outside friction disc 47 is both provided with tooth
Type, to cause the first external friction disk 42, first outside friction disc 43, outside second outside friction disc 45 and the described 3rd
Friction plate 47 is accordingly installed in the reserved flute profile mounting hole of the differential casing 3；First inner attrition piece 44, described second
The involute spline of inner attrition piece 46 and the 3rd inner attrition piece 48 with first lock ring 41 it is cylindrical on involute
Spline fitted is connected.
Similarly, include referring to Fig. 5, second friction mechanism 10：Second lock ring 51, the second external friction disk 52,
Four outside friction discs 53, the 4th inner attrition piece 54, the 5th outside friction disc 55, the 5th inner attrition piece 56, the 6th outside friction disc 57 and
Six inner attrition pieces 58；Wherein, second lock ring 51 is slidably connected with the right axle shaft gear 8；The second external friction disk
52nd, the 4th outside friction disc 53, the 4th inner attrition piece 54, the 5th outside friction disc 55, the 5th inner attrition piece 56, the 6th external friction
Order is arranged between second lock ring and the differential casing inner attrition piece 58 of piece 57 and the 6th successively；
The second external friction disk 52, the 4th outside friction disc 53, outside the 5th outside friction disc 55 and the described 6th
The outside of friction plate 57 is both provided with flute profile, to cause the second external friction disk 52, the 4th outside friction disc 53, described
Five outside friction discs 55 and the 6th outside friction disc 57 can be installed accordingly in the reserved flute profile mounting hole of the differential casing 3；
The involute spline of 4th inner attrition piece 54, the 5th inner attrition piece 56 and the 6th inner attrition piece 58 with it is described
Involute spline on second lock ring 51 is cylindrical, which coordinates, to be connected.
In addition, if differential mechanism works under differential operating mode, the friction plate of the first friction mechanism 9 and the second friction mechanism 10
Between phase mutual friction differential mechanism can be caused to produce substantial amounts of heat, in order to radiate in time, the present embodiment is left in the differential mechanism
End cap 4 and differential mechanism right end cap 2 are respectively arranged with oil sump and oilhole is lubricated radiating, by taking differential mechanism left end cap 4 as an example, ginseng
See Fig. 6, the side of the differential mechanism left end cap 4 is provided with oil sump 61, so as to can at the pyrotoxin of the first friction mechanism 9
To store more lubricating oil, and oil sump 61 can be led to heat is taken away into circulation, therefore make to be had at the first friction mechanism 9
The lubrication of effect and radiating.
Referring to Fig. 7, oil sump 62 is provided with the differential casing 3, and be evenly arranged on the differential casing 3
Oil-through hole 63, the quantity of the oil-through hole 63 can be set according to being actually needed, in the present embodiment, the quantity bag of oil-through hole 63
Include 4.Oil-through hole 63 is primarily used to circulate the internal lubrication oil of differential casing 3, for left planetary gear 5 and a left side
Axle shaft gear 7 is lubricated and radiated.
Further, oil-through hole 64, the mistake are set at the cylindrical and left cooperation of planetary gear 5 of differential mechanism left end cap 4
Oilhole 64 can be to the planetary sufficient lubrication of differential operating mode bottom left and radiating.So pass through oil sump in a limited space
61st, the minute design and arrangement of oil sump 62, oil-through hole 62 and oil-through hole 63, a circulation closed loop is formd so that
All parts of differential mechanism can carry out sufficient lubrication and radiating, and its reliability is greatly improved.
In practical application, power is inputted by spiral bevel gear 1, by differential mechanism right end cap 2, differential casing 3, left lateral star
Gear 5, right planetary gear 6, are transferred to left half axle gear 7 and right axle shaft gear 8 respectively, and power is transferred to by left half axle gear 7
Power is transferred to right wheel side semiaxis by left half of wheel shaft, right axle shaft gear 8 again.In the case of left and right wheelses not differential, power
Left and right half gear is averagely allocated to by differential casing 3 and left and right planetary gear respectively, now left and right planetary gear is only
Revolved round the sun around axis；If differential situation occur in left and right wheelses, left and right planetary gear is revolved round the sun not only about axis, and is enclosed
Around own axes rotation, therefore its middle left and right planetary gear direction of rotation is on the contrary, can realize left and right half gear differential.
Embodiment two
Corresponding to embodiment one, the present embodiment also provides a kind of main reducing gear, and the main reducing gear includes the institute of embodiment one
The differential assembly stated, the main reducing gear are arranged on the chassis of heavy-duty off-road vehicle, specifically, referring to Fig. 8, the car body bottom
Disk is provided with differential mechanism installation support 81；The both ends of the differential assembly 82 be separately installed with the first cone stick bearing 83 and
Second cone stick bearing 84, the differential assembly 82 pass through the first taper roll bearing 83 and the second taper roll bearing 84
In differential mechanism installation support 81；The differential mechanism installation support 81 is connected with reducer shell 83；The differential
By involute spline, in semiaxis 85, right wheel, semiaxis 86 is connected device assembly 82 with revolver respectively.
In the course of work, power is inputted by spiral bevel gear 1, by differential mechanism right end cap 2, differential casing 3, left lateral star
Gear 5, right planetary gear 6, are transferred to left half axle gear 7 and right axle shaft gear 8 respectively, and power is transferred to by left half axle gear 7
Power is transferred to right wheel side semiaxis 84 by left half of wheel shaft 83, right axle shaft gear 8 again.In the case of left and right wheelses not differential,
Power is averagely allocated to left and right half gear by differential casing 3 and left and right planetary gear respectively, now left and right planet tooth
Wheel revolves round the sun only around axis；If differential situation occur in left and right wheelses, left and right planetary gear is revolved round the sun not only about axis,
And own axes rotation is surrounded, therefore its middle left and right planetary gear direction of rotation is on the contrary, can realize that left and right half gear is poor
Speed.
Specifically, as shown in figure 1, the differential assembly includes：Spiral bevel gear 1, differential mechanism right end cap 2, differential mechanism
Housing 3, differential mechanism left end cap 4, left planetary gear 5, right planetary gear 6, left half axle gear 7, right axle shaft gear 8, first rub
Mechanism 9, the second friction mechanism 10；Wherein,
The spiral bevel gear 1 is connected with differential mechanism right end cap 2 by the first connecting bolt 11, the differential mechanism right end cap
2 are connected by the second connecting bolt 12 with differential casing 3, and the differential mechanism is parallel helical gear formula differential mechanism, for example is held in the palm
Gloomy differential mechanism.
The differential casing 3 is also connected by the 3rd connecting bolt 13 with differential mechanism left end cap 4.The left planetary gear
5 are uniformly arranged in the differential mechanism left end cap 4；The right planetary gear 6 is uniformly arranged in the differential mechanism right end cap 2；
The left half axle gear 7 is arranged in the first gear mounting hole of described one end of differential casing 3, and the right axle shaft gear 8 is pacified
In the second gear mounting hole of the other end of differential casing 3, first friction mechanism 9 is arranged on the differential mechanism
Between left end cap 4 and the differential casing 3；Second friction mechanism 10 be arranged on the differential mechanism right end cap 2 with it is described
Between differential casing 3.Wherein, the left half axle gear 7, the right axle shaft gear 8 are coaxial with the differential casing 3.
Specifically, it is arranged on the left half axle gear 7 with the right planetary gear 6 referring to Fig. 2, the left planetary gear 5
Between the right axle shaft gear 8, the left planetary gear 5 includes：First planetary gear 21, the second planetary gear the 22, the 3rd
Planetary gear 23 and fourth planet gear 24；The right planetary gear 6 includes：Fifth line star gear 31, the 6th planetary gear 32,
7th planetary gear 33 and the 8th planetary gear 34；Wherein, referring to Fig. 3, the first planetary gear 21, the second planetary gear 22,
Three planetary gears 23 and fourth planet gear 24 are separately mounted in the differential mechanism left end cap 4 corresponding left planetary gear installation
Kong Zhong；Fifth line star gear 31, the 6th planetary gear 32, the 7th planetary gear 33 and the 8th planetary gear 34 are separately mounted to institute
State in differential mechanism right end cap 2 in corresponding right lateral star pinion mounting holes.
Also, first planetary gear 21 engages with the fifth line star gear 31；Second planetary gear 32 with
6th planetary gear 32 engages；The third planet gear 23 engages 33 with the 7th planetary gear；The fourth line
Star gear 24 engages with the 8th planetary gear 34.The left half axle gear 7 respectively with first planetary gear 21, described
Second planetary gear 22, the third planet gear 23 and the fourth planet gear 24 engage；The right axle shaft gear 8 is distinguished
With the fifth line star gear 31, the 6th planetary gear 32, the 7th planetary gear 33 and the 8th planetary gear
34 engagements.
Here, in order to meet that gear-driven engagement requires, each left lateral star pinion mounting holes and corresponding each right lateral star tooth
Drift angle is there are between wheel mounting hole, the angle of the drift angle determines according to planetary model.
In addition, in order to meet offroad vehicle high pulling torque (be at least 14000N*m) and high rotating speed (being at least 4000r/min) with
And the requirement of limited installation space, also need rationally to set the left planetary gear and the planetary parameters in the right side, than
If such as described left planetary gear and the planetary module in the right side are 2.5~3.5, it is therefore preferable to 3；The left lateral star
The number of teeth of gear is 6~8 with the planetary number of teeth in the right side, it is therefore preferable to 6；The left planetary gear and the right lateral star tooth
The pressure angle of wheel is 20~30 °, it is therefore preferable to 30 °；The left planetary gear and the planetary helical angle in right side for 30~
45 °, it is therefore preferable to 37.5 °；The number of teeth of left half axle gear and right axle shaft gear is all 18~20, it is therefore preferable to 18；Left lateral star tooth
Wheel is 4 and distributing position etc. with right planetary number, so could pass through left planetary gear under slippery going operating mode
And right planetary rotation produces suitable axial force, so that each gear face produces larger moment of friction, therefore can
It is effective to improve the sliding ability of differential mechanism itself limit.
In order to further improve the internal friction torque of differential assembly, it is additionally provided with the first friction mechanism 9 and second rubs
Wipe mechanism 10；Referring to Fig. 4, first friction mechanism 9 includes：First lock ring 41, the first external friction disk 42, the first external friction
Piece 43, the first inner attrition piece 44, the second outside friction disc 45, the second inner attrition piece 46, the 3rd outside friction disc 47 and the 3rd interior friction
Piece 48；Wherein,
First lock ring 41 is slidably connected with the left half axle gear 7；The first external friction disk 42, described first
Outside friction disc 43, the first inner attrition piece 44, the second outside friction disc 45, the second inner attrition piece 46, the 3rd outside friction disc 47 and the 3rd
Order is arranged between first lock ring and the differential casing 3 inner attrition piece 48 successively；The first external friction disk
42nd, the outside of first outside friction disc 43, second outside friction disc 45 and the 3rd outside friction disc 47 is both provided with tooth
Type, to cause the first external friction disk 42, first outside friction disc 43, outside second outside friction disc 45 and the described 3rd
Friction plate 47 is accordingly installed in the reserved flute profile mounting hole of the differential casing 3；First inner attrition piece 44, described second
The involute spline of inner attrition piece 46 and the 3rd inner attrition piece 48 with first lock ring 41 it is cylindrical on involute
Spline fitted is connected.
Similarly, include referring to Fig. 5, second friction mechanism 10：Second lock ring 51, the second external friction disk 52,
Four outside friction discs 53, the 4th inner attrition piece 54, the 5th outside friction disc 55, the 5th inner attrition piece 56, the 6th outside friction disc 57 and
Six inner attrition pieces 58；Wherein, second lock ring 51 is slidably connected with the right axle shaft gear 8；The second external friction disk
52nd, the 4th outside friction disc 53, the 4th inner attrition piece 54, the 5th outside friction disc 55, the 5th inner attrition piece 56, the 6th external friction
Order is arranged between second lock ring and the differential casing inner attrition piece 58 of piece 57 and the 6th successively；
The second external friction disk 52, the 4th outside friction disc 53, outside the 5th outside friction disc 55 and the described 6th
The outside of friction plate 57 is both provided with flute profile, to cause the second external friction disk 52, the 4th outside friction disc 53, described
Five outside friction discs 55 and the 6th outside friction disc 57 can be installed accordingly in the reserved flute profile mounting hole of the differential casing 3；
The involute spline of 4th inner attrition piece 54, the 5th inner attrition piece 56 and the 6th inner attrition piece 58 with it is described
Involute spline on second lock ring 51 is cylindrical, which coordinates, to be connected.
In addition, if differential mechanism works under differential operating mode, the friction plate of the first friction mechanism 9 and the second friction mechanism 10
Between phase mutual friction differential mechanism can be caused to produce substantial amounts of heat, in order to radiate in time, the present embodiment is left in the differential mechanism
End cap 4 and differential mechanism right end cap 2 are respectively arranged with oil sump and oilhole is lubricated radiating, by taking differential mechanism left end cap 4 as an example, ginseng
See Fig. 6, the side of the differential mechanism left end cap 4 is provided with oil sump 61, so as to can at the pyrotoxin of the first friction mechanism 9
To store more lubricating oil, and oil sump 61 can be led to heat is taken away into circulation, therefore make to be had at the first friction mechanism 9
The lubrication of effect and radiating.
Referring to Fig. 7, oil sump 62 is provided with the differential casing 3, and be evenly arranged on the differential casing 3
Oil-through hole 63, the quantity of the oil-through hole 63 can be set according to being actually needed, in the present embodiment, the quantity bag of oil-through hole 63
Include 4.Oil-through hole 63 is primarily used to circulate the internal lubrication oil of differential casing 3, for left planetary gear 5 and a left side
Axle shaft gear 7 is lubricated and radiated.
Further, oil-through hole 64, the mistake are set at the cylindrical and left cooperation of planetary gear 5 of differential mechanism left end cap 4
Oilhole 64 can be to the planetary sufficient lubrication of differential operating mode bottom left and radiating.So pass through oil sump in a limited space
61st, the minute design and arrangement of oil sump 62, oil-through hole 62 and oil-through hole 63, a circulation closed loop is formd so that
All parts of differential mechanism can carry out sufficient lubrication and radiating, and its reliability is greatly improved.
The beneficial effect that can be brought the embodiments of the invention provide a kind of limited-slip differential assembly and main reducing gear is at least：
The invention provides a kind of limited-slip differential assembly and main reducing gear, the differential assembly includes：Screw conic tooth
Wheel, the spiral bevel gear are connected with differential mechanism right end cap, and the differential mechanism right end cap is connected with differential casing, the differential
Device housing is also connected with differential mechanism left end cap；Left planetary gear, the left planetary gear are arranged in the differential mechanism left end cap；
Right planetary gear, the right planetary gear are arranged in the differential mechanism right end cap；Left half axle gear, the left half axle gear peace
In the first gear mounting hole of described differential casing one end；Right axle shaft gear, the right axle shaft gear are arranged on described
In the second gear mounting hole of the differential casing other end；First friction mechanism, first friction mechanism are arranged on the difference
Between fast device left end cap and the differential casing；Second friction mechanism, second friction mechanism are arranged on the differential mechanism
Between right end cap and the differential casing；Wherein, the left planetary gear and the planetary module in the right side are 2.5
~3.5；The planetary number of teeth in a left side is 6~8 with the planetary number of teeth in the right side；The left planetary gear and the right side
Planetary pressure angle is 20~30 °；The left planetary gear is 30~45 ° with the planetary helical angle in the right side；Such as
This, by rationally setting left planetary gear, right planetary gear, left half axle gear and the structural parameters and arrangement of right axle shaft gear；
When vehicle runs into the operating modes such as skidding, two wheels cause to pass to left and right half gear in the presence of torsion because of traction difference
Square is poor, and now differential mechanism can be according to difference in torque automatic sensing to differential；Left planetary gear and right planetary gear are around half axle gear
Also around own axes rotation while wheel axis revolves round the sun, now left planetary gear, right planetary gear, left half axle gear and right axle shaft
Axial force caused by gear engagement, so that producing larger moment of friction between each gear face；And axial force is passed
The first friction mechanism and the second friction mechanism are passed, the further restrictions planetary gear rotation of frictional force is produced between friction mechanism,
Internal friction torque is further generated, the limit for improving the automatic limited-slip differential of moment of torsion induction type slides ability.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., it should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of limited-slip differential assembly, it is characterised in that the differential assembly includes：
Spiral bevel gear, the spiral bevel gear are connected with differential mechanism right end cap, the differential mechanism right end cap and differential casing
It is connected, the differential casing is also connected with differential mechanism left end cap；
Left planetary gear, the left planetary gear are arranged in the differential mechanism left end cap；
Right planetary gear, the right planetary gear are arranged in the differential mechanism right end cap；
Left half axle gear, the left half axle gear are arranged in the first gear mounting hole of described differential casing one end；
Right axle shaft gear, the right axle shaft gear are arranged in the second gear mounting hole of the differential casing other end；
First friction mechanism, first friction mechanism are arranged between the differential mechanism left end cap and the differential casing；
Second friction mechanism, second friction mechanism are arranged between the differential mechanism right end cap and the differential casing；
Wherein,
The left planetary gear and the planetary module in the right side are 2.5~3.5；The planetary number of teeth in a left side with
The planetary number of teeth in the right side is 6~8；The left planetary gear is 20~30 ° with the planetary pressure angle in the right side；Institute
It is 30~45 ° that left planetary gear, which is stated, with the planetary helical angle in the right side.
2. differential assembly as claimed in claim 1, it is characterised in that the left planetary gear includes：First planetary gear,
Second planetary gear, third planet gear and fourth planet gear；The right planetary gear includes：Fifth line star gear, the 6th
Planetary gear, the 7th planetary gear and the 8th planetary gear；Wherein,
First planetary gear, second planetary gear, third planet gear and fourth planet gear are separately mounted to institute
State in differential mechanism left end cap in corresponding planetary gear mounting hole；
The fifth line star gear, the 6th planetary gear, the 7th planetary gear and the 8th planetary gear are separately mounted to institute
State in differential mechanism right end cap in corresponding planetary gear mounting hole.
3. differential assembly as claimed in claim 2, it is characterised in that first planetary gear and the fifth line star tooth
Wheel engagement；Second planetary gear engages with the 6th planetary gear；The third planet gear and the 7th planet
Gear engages；The fourth planet gear engages with the 8th planetary gear；
The left half axle gear respectively with first planetary gear, second planetary gear, the third planet gear and
The fourth planet gear engagement；
The right axle shaft gear respectively with the fifth line star gear, the 6th planetary gear, the 7th planetary gear and
The 8th planetary gear engagement.
4. differential assembly as claimed in claim 1, it is characterised in that first friction mechanism includes：First lock ring,
First external friction disk, the first outside friction disc, the first inner attrition piece, the second outside friction disc, the second inner attrition piece, the 3rd outside friction disc
And the 3rd inner attrition piece；Wherein,
First lock ring is slidably connected with the left half axle gear；
The first external friction disk, first outside friction disc, the first inner attrition piece, the second outside friction disc, the second inner attrition piece,
3rd outside friction disc and the 3rd inner attrition piece are sequentially arranged between first lock ring and the differential casing successively；
The first external friction disk, first outside friction disc, second outside friction disc and the 3rd outside friction disc are corresponding
Install in the reserved flute profile mounting hole of the differential casing；
The involute spline of first inner attrition piece, second inner attrition piece and the 3rd inner attrition piece is with described
Involute spline on one lock ring is cylindrical, which coordinates, to be connected.
5. differential assembly as claimed in claim 1, it is characterised in that second friction mechanism includes：Second lock ring,
Second external friction disk, the 4th outside friction disc, the 4th inner attrition piece, the 5th outside friction disc, the 5th inner attrition piece, the 6th outside friction disc
And the 6th inner attrition piece；Wherein,
Second lock ring is connected with the right axle shaft gears slip；
The second external friction disk, the 4th outside friction disc, the 4th inner attrition piece, the 5th outside friction disc, the 5th inner attrition piece,
6th outside friction disc and the 6th inner attrition piece are sequentially arranged between second lock ring and the differential casing successively；
The second external friction disk, the 4th outside friction disc, the 5th outside friction disc and the 6th outside friction disc are corresponding
Install in the reserved flute profile mounting hole of the differential casing；
The involute spline of 4th inner attrition piece, the 5th inner attrition piece and the 6th inner attrition piece is with described
Involute spline on two lock rings are cylindrical, which coordinates, to be connected.
6. differential assembly as claimed in claim 1, it is characterised in that the differential mechanism left end cap and the differential mechanism right-hand member
Cover and be provided with lubrication oil-through hole and oil sump.
7. differential assembly as claimed in claim 1, it is characterised in that the differential mechanism is parallel helical gear formula differential
Device.
8. differential assembly as claimed in claim 1, it is characterised in that the left half axle gear, the right axle shaft gear with
The differential casing is coaxial.
9. differential assembly as claimed in claim 2, it is characterised in that the left lateral star pinion mounting holes and the right lateral star
There is a drift angle between pinion mounting holes.
10. a kind of main reducing gear, it is characterised in that it is total that the main reducing gear includes any described differential mechanism of claim 1 to 9
Into.
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| CN201710456603.6A CN107387714B (en) | 2017-06-16 | 2017-06-16 | A kind of limited-slip differential assembly and main reducing gear |
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| CN201710456603.6A CN107387714B (en) | 2017-06-16 | 2017-06-16 | A kind of limited-slip differential assembly and main reducing gear |
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| CN107387714A true CN107387714A (en) | 2017-11-24 |
| CN107387714B CN107387714B (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN203641435U (en) * | 2013-12-02 | 2014-06-11 | 东风商用车有限公司 | Wear-proof parallel shaft type limited slip differential |
| WO2014119370A1 (en) * | 2013-01-31 | 2014-08-07 | 日立建機株式会社 | Axle device for vehicle |
| CN106438916A (en) * | 2016-12-03 | 2017-02-22 | 唐山爱特精密机器制造有限公司 | Electronically controlled locking screw tooth limited slip differential |
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| CN201731036U (en) * | 2010-07-16 | 2011-02-02 | 一拖(洛阳)开创装备科技有限公司 | Self-adaptive antiskid differential of friction plate for tractor |
| WO2014119370A1 (en) * | 2013-01-31 | 2014-08-07 | 日立建機株式会社 | Axle device for vehicle |
| CN203641435U (en) * | 2013-12-02 | 2014-06-11 | 东风商用车有限公司 | Wear-proof parallel shaft type limited slip differential |
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| 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 |
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| CN107387714B (en) | 2019-08-13 |
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