CN105485294A - Automotive differential mechanism with needle roller and roller blocks driven by double-phase inner shock wave cam - Google Patents

Automotive differential mechanism with needle roller and roller blocks driven by double-phase inner shock wave cam Download PDF

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Publication number
CN105485294A
CN105485294A CN201610040182.4A CN201610040182A CN105485294A CN 105485294 A CN105485294 A CN 105485294A CN 201610040182 A CN201610040182 A CN 201610040182A CN 105485294 A CN105485294 A CN 105485294A
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CN
China
Prior art keywords
needle roller
roller
left half
cam ring
central gear
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Pending
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CN201610040182.4A
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Chinese (zh)
Inventor
梁尚明
陈飞宇
徐毅
李华
林光春
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Sichuan University
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Sichuan University
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Priority to CN201610040182.4A priority Critical patent/CN105485294A/en
Publication of CN105485294A publication Critical patent/CN105485294A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H48/00Differential gearings
    • F16H48/12Differential gearings without gears having orbital motion
    • F16H48/14Differential gearings without gears having orbital motion with cams
    • F16H48/147Differential gearings without gears having orbital motion with cams with driven cam followers or balls engaging two opposite cams

Abstract

The invention provides an automotive differential mechanism with needle roller and roller blocks driven by a double-phase inner shock wave cam and belongs to the technical field of mechanical transmission. According to the novel automotive differential mechanism, a straight-tooth bevel gear is arranged outside an outer-tooth inner cam, the double-phase inner cam is arranged in the outer-tooth inner cam, the needle roller and roller blocks are engaged with the outer-tooth inner cam, a left half shaft frame and a right half shaft center wheel through multiple teeth, and the engaged positions are in pure rolling contact connection. Power is input from the bevel gear outside the outer-tooth inner cam, transmitted to the needle roller and roller blocks through the double-phase inner cam of the outer-tooth inner cam and then transmitted to the left half shaft frame fixedly connected with a left wheel and the right half shaft center wheel fixedly connected with a right wheel through the needle roller and roller blocks, so that the differential of the left wheel and the right wheel is achieved. By the adoption of the automotive differential mechanism, a planetary gear system in a traditional automotive differential mechanism is omitted, and the automotive differential mechanism is more compact in structure, small in size, low in weight, capable of achieving multi-tooth engagement, large in contact ratio, high in bearing capacity and transmission efficiency and capable of being widely applied to various wheel vehicles, such as automobiles and engineering vehicles which need the differential mechanism.

Description

Interior Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential
Technical field
The present invention relates to a kind of interior Double-phase shock wave wheel drive needle roller and roll Subblock-wise automobile differential, for the differential of wheeled vehicle, belong to technical field of mechanical transmission.
Background technique
Automobile differential conventional at present all adopts the epicyclic gear system be made up of multiple spur bevel gear to realize the object of differential, although this system can realize the function of automobile left and right half differential, but this component of a system is more, axis and radial dimension are all large, volume is large, heavier-weight, particularly for heavy-duty car, in order to can realize differential and transmit enough power, then volume and weight can increase further; It is low that spur bevel gear transmission also has contact ratio, therefore bearing capacity is low, and transmission efficiency is not high, spur bevel gear processing difficulties, the shortcomings such as manufacturability is poor.
Summary of the invention
The object of the invention is: for overcoming the above-mentioned shortcoming that existing automobile differential exists, the invention provides a kind of simple and compact for structure, axis and radial dimension is little, lightweight, contact ratio is high, bearing capacity is large, transmission efficiency is high that Novel differential gear---interior Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential.
The technological scheme that the present invention takes for its technical problem of solution is: in a kind of, Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential, primarily of external tooth cam ring (1), left half axle frame (2), tapered roller bearing (3), right half shell (4), needle roller roller block (5), right axle shaft central gear (6), deep groove ball bearing (7), screw (8), deep groove ball bearing (9), needle roller (10), sleeve pad (12), deep groove ball bearing (13) forms, it is characterized in that: the epicyclic gear system having abandoned orthodox car differential mechanism, replace " external tooth cam ring---needle roller roller block---central gear " system, this system mainly comprises external tooth cam ring (1), left half axle frame (2), needle roller roller block (5), right axle shaft central gear (6), differential is realized with this system, form differential mechanism, the outside of external tooth cam ring (1) is spur bevel gear, inside is two-phase cam ring i.e. two eccentric circle or oval two-phase cam ring, therefore external tooth cam ring (1) is a bevel gear of main reducing gear, it is again the interior Double-phase shock wave device in differential mechanism, main reducing gear and differential mechanism are organically integrated by external tooth cam ring (1), and external tooth cam ring (1) and right half shell (4) are fixedly connected into an entirety by screw (8) and are supported in frame by a pair tapered roller bearing (3), the left end of left half axle frame (2) is left half axle, left half axle frame (2) is connected mutually by left half axle and left side rear wheel (14), the right-hand member of left half axle frame (2) is tube-in-tube structure, this tube-in-tube structure is loaded in the two-phase cam ring of external tooth cam ring (1), and the circumference along this tube-in-tube structure has Z 2individual radial guide groove, at this guide groove built with needle roller roller block (5), left half axle frame (2) is supported in external tooth cam ring (1) by a pair deep groove ball bearing (13), right axle shaft central gear (6) is the external cam with multiple concave portion, and the number of its projection is called and the number of teeth of right axle shaft central gear (6) is designated as Z 6right axle shaft central gear (6) is embedded in the right-hand member tube-in-tube structure of left half axle frame (2), the right-hand member of right axle shaft central gear (6) is right axle shaft, right axle shaft central gear (6) is fixed together by right axle shaft and the right rear wheel (15), and the left end of right axle shaft central gear (6) is supported within left half axle frame (2) by deep groove ball bearing (9), right-hand member is supported within right half shell (4) by deep groove ball bearing (7), above-mentioned needle roller roller block (5) is made up of backbone block (16), pin (17), needle roller (18), needle roller sleeve (19), be drive fit between the two ends of pin (17) and the hole of backbone block (16) both sides, the needle roller sleeve (19) being arranged on backbone block (16) two ends is supported by pin (17) and passes through needle roller (18) and forms rolling connecting relation with backbone block (16), the radial guide groove inwall of the right-hand member tube-in-tube structure of left half axle frame (2) radially has the groove filling needle roller (10), at this groove built with some needle rollers (10), needle roller roller block (5) is contained in the radial guide groove of the right-hand member sleeve of left half axle frame (2), it can form rolling connecting relation to moving and passing through the some needle rollers (10) in guide groove with the radial guide groove of left half axle frame (2) in the radial guide groove central diameter of left half axle frame (2), namely needle roller (10) makes the contact between needle roller roller block (5) and left half axle frame (2) become rolling friction from sliding friction, the needle roller sleeve (19) at needle roller roller block (5) two ends is meshed with the two-phase cam ring profile of external tooth cam ring (1) and the external cam profile of right axle shaft central gear (6) each composition pure rolling higher pair respectively, the external cam profilogram of right axle shaft central gear (6) is that needle roller roller block (5) rotates with left half axle frame (2) on the one hand, in the process of on the other hand movement in the radial guide groove of left half axle frame (2) again, the envelope of a series of position residing for its inner needle roller sleeve (19), the tooth number Z of right axle shaft central gear (6) 6with the number Z of needle roller roller block (5) 2difference be 2.
Other NM places of differential mechanism of the present invention, as left half axle frame (2), connecting etc. of right axle shaft central gear (6) and wheel of vehicle all adopt prior art.
Compared with the prior art primary object of the present invention is:
1. the present invention replaces the epicyclic gear system of orthodox car differential mechanism by " external tooth cam ring---needle roller roller block---central gear " system, this system mainly comprises external tooth cam ring, left half axle frame, needle roller roller block, right axle shaft central gear, realize differential with this system, form differential mechanism.
2. the outside of external tooth cam ring is spur bevel gear, inside is two-phase cam ring i.e. two eccentric circles or oval two-phase cam ring, therefore external tooth cam ring is a bevel gear of main reducing gear, it is again the interior Double-phase shock wave device in differential mechanism, main reducing gear and differential mechanism are organically integrated by external tooth cam ring, and external tooth cam ring and right half shell are fixedly connected into an entirety by screw and are supported in frame by a pair tapered roller bearing; The left end of left half axle frame is left half axle, and left half axle frame is connected mutually by left half axle and left side rear wheel, and the right-hand member of left half axle frame is tube-in-tube structure, and this tube-in-tube structure is loaded in the two-phase cam ring of external tooth cam ring, and the circumference along this tube-in-tube structure has Z 2individual radial guide groove, at this guide groove built with needle roller roller block, left half axle frame is supported in external tooth cam ring by a pair deep groove ball bearing; Right axle shaft central gear is the external cam with multiple concave portion, the number of its projection is called the number of teeth of right axle shaft central gear, right axle shaft central gear is embedded in the right-hand member tube-in-tube structure of left half axle frame, the right-hand member of right axle shaft central gear is right axle shaft, right axle shaft central gear is fixed together by right axle shaft and the right rear wheel, and the left end of right axle shaft central gear is supported within left half axle frame by deep groove ball bearing, right-hand member is supported within right half shell by deep groove ball bearing; Above-mentioned needle roller roller block is made up of backbone block, pin, needle roller, needle roller sleeve, is drive fit between the two ends of pin and the hole of backbone block both sides, and the needle roller sleeve being arranged on backbone block two ends is supported by pin and forms rolling connecting relation by needle roller and backbone block; The radial guide groove inwall of the right-hand member tube-in-tube structure of left half axle frame radially has the groove filling needle roller, at this groove built with some needle rollers, needle roller roller is packaged in the radial guide groove of the right-hand member sleeve of left half axle frame, it can in the radial guide groove central diameter of left half axle frame to move and the radial guide groove of the some needle rollers passed through in guide groove and left half axle frame forms rolling connecting relation, and namely needle roller makes the contact between needle roller roller block and left half axle frame become rolling friction from sliding friction; The needle roller sleeve at needle roller roller block two ends is meshed with the two-phase cam ring profile of external tooth cam ring and the external cam profile of right axle shaft central gear each composition pure rolling higher pair respectively; The external cam profilogram of right axle shaft central gear is that needle roller roller block rotates with left half axle frame on the one hand, in the process of movement in the radial guide groove of left half axle frame again on the other hand, and the envelope of a series of position residing for its inner needle roller sleeve; The tooth number Z of right axle shaft central gear 6with the number Z of needle roller roller block 2difference be 2.
3. left half axle frame and right axle shaft central gear is passed to through needle roller roller block after driving force passes to external tooth cam ring, thus pass to left and right rear wheel, and needle roller roller block be rolling friction between external tooth cam ring, left half axle frame and right axle shaft central gear and connect, therefore the transmission efficiency of differential mechanism of the present invention is high.
4. needle roller roller block is multiple tooth engagement with between external tooth cam ring, left half axle frame and right axle shaft central gear, therefore contact ratio is large, and bearing capacity is large, can realize high-power, high pulling torque differential drive.
5. external tooth cam ring, left half axle frame and right axle shaft central gear are axially symmetric structure, inertial force and suffered external force all autobalances, therefore differential mechanism smooth running.
The present invention, compared with existing conventional automobile differential, has following useful technique effect:
1. compact structure, axially and radial dimension little, volume is little, lightweight
The present invention adopts " external tooth cam ring---needle roller roller block---central gear " system to replace the epicyclic gear system of orthodox car differential mechanism, and the axis of transmission device and radial dimension are all little, and thus the compact structure of differential mechanism of the present invention, volume are little, lightweight.
2. contact ratio is large, and bearing capacity is high
In the present invention, needle roller roller block is multiple tooth engagement with between external tooth cam ring, left half axle frame and right axle shaft central gear, the needle roller roller block of 50% can be had at most to participate in joggleword simultaneously, therefore contact ratio is high, bearing capacity is high, can realize high-power, high pulling torque differential drive.
3. transmission efficiency is high
Needle roller roller block be rolling friction between external tooth cam ring, left half axle frame and right axle shaft central gear and connect, therefore the transmission efficiency of differential mechanism of the present invention is high.
4. good manufacturability, cost of production are low
Part in differential mechanism of the present invention mostly is circular, simple shape, easilier than the bevel gear in epicyclic gear system processes, and good manufacturability, cost of production is low.
5. with automatic retarding effect when realizing differential function
Differential mechanism of the present invention can produce certain retarding braking effect automatically when automobile enters bend, and degree of deceleration increases with the reduction of radius of turn, vehicle is travelled safer.
6. stress equalization, smooth running
External tooth cam ring, left half axle frame and right axle shaft central gear are axially symmetric structure, inertial force and suffered external force all autobalances, therefore differential mechanism smooth running.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.But want it is emphasized that; the specific embodiment of the present invention is not limited to the form below described by embodiment; those skilled in the art is not when paying creative work; also can design other embodiment easily; therefore the embodiment of embodiment given below should be interpreted as protection scope of the present invention, protection scope of the present invention is limited in given embodiment.
Fig. 1 is the structural representation that interior Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential
Fig. 2 is the A-A sectional view of Fig. 1
Fig. 3 is the partial enlarged drawing of Fig. 2
Fig. 4 is the structural representation of left half axle frame
Fig. 5 is the structural representation of external tooth cam ring
Fig. 6 is the structural representation of right axle shaft central gear
Fig. 7 is the assembling schematic diagram of needle roller roller block
Fig. 8 is the structural representation of backbone block
Fig. 9 is the differential gearing schematic diagram that interior Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential
The relative position relation schematic diagram of each wheel and differential mechanism when Figure 10 is automobile left-hand bend
The identification of object that above-mentioned each attached picture in picture knows label is: 1 external tooth cam ring; 2 left half axle framves; 3 tapered roller bearings; 4 right half shells; 5 needle roller roller blocks; 6 right axle shaft central gears; 7 deep groove ball bearings; 8 screws; 9 deep groove ball bearings; 10 needle rollers; The active spur bevel gear of 11 main reducing gears; 12 sleeve pads; 13 deep groove ball bearings; 14 left side rear wheels; Rear wheel on the right of in the of 15; 16 backbone block; 17 pins; 18 needle rollers; 19 needle roller sleeves.
Specific embodiment
In Fig. 1 to Fig. 8, Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential, primarily of external tooth cam ring (1), left half axle frame (2), tapered roller bearing (3), right half shell (4), needle roller roller block (5), right axle shaft central gear (6), deep groove ball bearing (7), screw (8), deep groove ball bearing (9), needle roller (10), sleeve pad (12), deep groove ball bearing (13) forms, it is characterized in that: the epicyclic gear system having abandoned orthodox car differential mechanism, replace " external tooth cam ring---needle roller roller block---central gear " system, this system mainly comprises external tooth cam ring (1), left half axle frame (2), needle roller roller block (5), right axle shaft central gear (6), differential is realized with this system, form differential mechanism, the outside of external tooth cam ring (1) is spur bevel gear, inside is two-phase cam ring and oval two-phase cam ring, therefore external tooth cam ring (1) is a bevel gear of main reducing gear, it is again the interior Double-phase shock wave device in differential mechanism, main reducing gear and differential mechanism are organically integrated by external tooth cam ring (1), and external tooth cam ring (1) and right half shell (4) are fixedly connected into an entirety by screw (8) and are supported in frame by a pair tapered roller bearing (3), the left end of left half axle frame (2) is left half axle, left half axle frame (2) is connected mutually by left half axle and left side rear wheel (14), the right-hand member of left half axle frame (2) is tube-in-tube structure, this tube-in-tube structure is loaded in the two-phase cam ring of external tooth cam ring (1), and the circumference along this tube-in-tube structure has Z 2individual radial guide groove, at this guide groove built with needle roller roller block (5), left half axle frame (2) is supported in external tooth cam ring (1) by a pair deep groove ball bearing (13), right axle shaft central gear (6) is the external cam with multiple concave portion, and the number of its projection is called and the number of teeth of right axle shaft central gear (6) is designated as Z 6right axle shaft central gear (6) is embedded in the right-hand member tube-in-tube structure of left half axle frame (2), the right-hand member of right axle shaft central gear (6) is right axle shaft, right axle shaft central gear (6) is fixed together by right axle shaft and the right rear wheel (15), and the left end of right axle shaft central gear (6) is supported within left half axle frame (2) by deep groove ball bearing (9), right-hand member is supported within right half shell (4) by deep groove ball bearing (7), above-mentioned needle roller roller block (5) is made up of backbone block (16), pin (17), needle roller (18), needle roller sleeve (19), be drive fit between the two ends of pin (17) and the hole of backbone block (16) both sides, the needle roller sleeve (19) being arranged on backbone block (16) two ends is supported by pin (17) and passes through needle roller (18) and forms rolling connecting relation with backbone block (16), the radial guide groove inwall of the right-hand member tube-in-tube structure of left half axle frame (2) radially has the groove filling needle roller (10), at this groove built with some needle rollers (10), needle roller roller block (5) is contained in the radial guide groove of the right-hand member sleeve of left half axle frame (2), it can form rolling connecting relation to moving and passing through the some needle rollers (10) in guide groove with the radial guide groove of left half axle frame (2) in the radial guide groove central diameter of left half axle frame (2), namely needle roller (10) makes the contact between needle roller roller block (5) and left half axle frame (2) become rolling friction from sliding friction, the needle roller sleeve (19) at needle roller roller block (5) two ends is meshed with the two-phase cam ring profile of external tooth cam ring (1) and the external cam profile of right axle shaft central gear (6) each composition pure rolling higher pair respectively, the external cam profilogram of right axle shaft central gear (6) is that needle roller roller block (5) rotates with left half axle frame (2) on the one hand, in the process of on the other hand movement in the radial guide groove of left half axle frame (2) again, the envelope of a series of position residing for its inner needle roller sleeve (19), the tooth number Z of right axle shaft central gear (6) 6with the number Z of needle roller roller block (5) 2difference be 2.
The working principle of differential mechanism of the present invention is: when the driven wheel of differential of main reducing gear and external tooth cam ring (1) are driven and rotate with constant angular velocity, due to the radius vector change of the two-phase cam ring of external tooth cam ring (1), thrust is produced to needle roller roller block (5), force needle roller roller block (5) to move in the radial guide groove of left half axle frame (2) and promote left half axle frame (2) and rotate, meanwhile contacted with the higher pair of right axle shaft central gear (6) by needle roller roller block (5) and also will promote right axle shaft central gear (6) and rotate, thus form a two degrees of freedom differential system, motion on left half axle frame (2) and right axle shaft central gear (6) and power then pass to a coupled left side respectively, right rear wheel.Right axle shaft central gear (6) and left half axle frame (2) rotate respectively under the effect of driving force, but respective motion state is uncertain, are determined by the different road surface of left and right rear wheel, bend situation.When automobile straight-line travelling on straight road, when wheel on wheel on left half axle frame (2) and right axle shaft central gear (6) is without speed discrepancy, left half axle frame (2) is identical with the rotating speed of right axle shaft central gear (6), and namely differential mechanism does not have differential action.Now, in differential mechanism, each parts keep geo-stationary, and torque is inputted by external tooth cam ring (1), on average passes to left half axle frame (2) and right axle shaft central gear (6) through needle roller roller block (5).Travel when automobile turning or on rough road, when there is speed discrepancy in left and right two-wheeled below, needle roller roller block (5) ordering about by external tooth cam ring (1), left half axle frame (2) and right axle shaft central gear (6) is driven to rotate on the one hand, radially moving in the radial guide groove of left half axle frame (2) while rotating with left half axle frame (2) on the other hand, ensureing that left half axle frame (2) and right axle shaft central gear (6) are able to realize differential when not departing from transmission.And because needle roller roller block (5) is to the effect of the moment that the active force of left half axle frame (2) and right axle shaft central gear (6) produces, the driving wheel making rotating speed slow can obtain the torque that the fast driving wheel of specific speed is larger.
For the differential property of differential mechanism of the present invention is described, if left and right wheel speed is respectively n after automobile 2, n 6, the rotating speed of external tooth cam ring (1) is n 1, then can be obtained by Fig. 9:
n 2 - n 1 n 6 - n 1 = Z 6 Z 2 - - - ( 1 )
In formula, Z 2---the number of needle roller roller block; Z 6---the number of teeth of right axle shaft central gear.
As established automobile to turn left, two front-wheels of automobile are under the effect of steering equipment (Figure 10), and the axis of its axis and automobile two trailing wheel intersects at P point, now can be considered that whole automobile turns round around P point.When wheel and ground non-slip, the rotating speed of two trailing wheels should be directly proportional to turning radius, can be obtained by Figure 10:
n 2 n 6 = ( r - L ) / ( r + L ) - - - ( 2 )
In formula, r---bend mean radius; L---rear tread partly.
Simultaneous solution formula (1), formula (2), and establish then can obtain:
n 2 = ( r - L ) ( 1 - s ) r - L - s r - s L n 1 - - - ( 3 )
n 6 = ( r + L ) ( 1 - s ) r - L - s r - s L n 1 - - - ( 4 )
Under the vehicle parameter determined and driving conditions, n 1, s, L be known.Therefore, n 2with n 6only become with radius of turn r.Therefore differential mechanism of the present invention possesses differential function, the vehicle equipping this differential mechanism can by any half curve.
Investigate the mean speed of the vehicle both sides wheel of equipment differential mechanism of the present invention:
n M=0.5(n 6+n 2)(5)
During straight-line travelling, n 6=n 2=n 1:
n M=n 1(6)
During Turning travel, formula (3), formula (4) are substituted into formula (5) and obtain:
n M = ( 1 - s ) r ( 1 - s ) r - ( 1 + s ) L n 1 - - - ( 7 )
Order W = ( 1 - s ) r ( 1 - s ) r - ( 1 + s ) L , Then formula (7) becomes:
n M=Wn 1(8)
Usual s>1, knows W<1 by formula (8), therefore has:
n M<n 1(9)
And n mincrease with r and increase, when r → 0, n m→ 0; As r →+∞, n m→ n 1, namely when radius of turn r level off to 0 time, the speed of a motor vehicle also levels off to 0; Radius of turn level off to infinity time (straight-line travelling), the speed of a motor vehicle levels off to n 1.Visible, differential mechanism of the present invention has the function of bend automatic retarding, and slowing effect is directly related with bend emergency degree, and vehicle travels safer.
The present invention can be widely used in all wheeled vehicles needing differential mechanism, as automobile, engineering vehicle etc.

Claims (2)

1. in, Double-phase shock wave wheel drive needle roller rolls Subblock-wise automobile differential, primarily of external tooth cam ring (1), left half axle frame (2), tapered roller bearing (3), right half shell (4), needle roller roller block (5), right axle shaft central gear (6), deep groove ball bearing (7), screw (8), deep groove ball bearing (9), needle roller (10), sleeve pad (12), deep groove ball bearing (13) forms, it is characterized in that: the epicyclic gear system having abandoned orthodox car differential mechanism, replace " external tooth cam ring---needle roller roller block---central gear " system, this system mainly comprises external tooth cam ring (1), left half axle frame (2), needle roller roller block (5), right axle shaft central gear (6), differential is realized with this system, form differential mechanism, the outside of external tooth cam ring (1) is spur bevel gear, inside is two-phase cam ring i.e. two eccentric circle or oval two-phase cam ring, therefore external tooth cam ring (1) is a bevel gear of main reducing gear, it is again the interior Double-phase shock wave device in differential mechanism, main reducing gear and differential mechanism are organically integrated by external tooth cam ring (1), and external tooth cam ring (1) and right half shell (4) are fixedly connected into an entirety by screw (8) and are supported in frame by a pair tapered roller bearing (3), the left end of left half axle frame (2) is left half axle, left half axle frame (2) is connected mutually by left half axle and left side rear wheel (14), the right-hand member of left half axle frame (2) is tube-in-tube structure, this tube-in-tube structure is loaded in the two-phase cam ring of external tooth cam ring (1), and the circumference along this tube-in-tube structure has Z 2individual radial guide groove, at this guide groove built with needle roller roller block (5), left half axle frame (2) is supported in external tooth cam ring (1) by a pair deep groove ball bearing (13), right axle shaft central gear (6) is the external cam with multiple concave portion, and the number of its projection is called and the number of teeth of right axle shaft central gear (6) is designated as Z 6right axle shaft central gear (6) is embedded in the right-hand member tube-in-tube structure of left half axle frame (2), the right-hand member of right axle shaft central gear (6) is right axle shaft, right axle shaft central gear (6) is fixed together by right axle shaft and the right rear wheel (15), and the left end of right axle shaft central gear (6) is supported within left half axle frame (2) by deep groove ball bearing (9), right-hand member is supported within right half shell (4) by deep groove ball bearing (7), above-mentioned needle roller roller block (5) is made up of backbone block (16), pin (17), needle roller (18), needle roller sleeve (19), be drive fit between the two ends of pin (17) and the hole of backbone block (16) both sides, the needle roller sleeve (19) being arranged on backbone block (16) two ends is supported by pin (17) and passes through needle roller (18) and forms rolling connecting relation with backbone block (16), the radial guide groove inwall of the right-hand member tube-in-tube structure of left half axle frame (2) radially has the groove filling needle roller (10), at this groove built with some needle rollers (10), needle roller roller block (5) is contained in the radial guide groove of the right-hand member sleeve of left half axle frame (2), it can form rolling connecting relation to moving and passing through the some needle rollers (10) in guide groove with the radial guide groove of left half axle frame (2) in the radial guide groove central diameter of left half axle frame (2), namely needle roller (10) makes the contact between needle roller roller block (5) and left half axle frame (2) become rolling friction from sliding friction, the needle roller sleeve (19) at needle roller roller block (5) two ends is meshed with the two-phase cam ring profile of external tooth cam ring (1) and the external cam profile of right axle shaft central gear (6) each composition pure rolling higher pair respectively, the external cam profilogram of right axle shaft central gear (6) is that needle roller roller block (5) rotates with left half axle frame (2) on the one hand, in the process of on the other hand movement in the radial guide groove of left half axle frame (2) again, the envelope of a series of position residing for its inner needle roller sleeve (19), the tooth number Z of right axle shaft central gear (6) 6with the number Z of needle roller roller block (5) 2difference be 2.
2. interior Double-phase shock wave wheel drive needle roller according to claim 1 rolls Subblock-wise automobile differential, it is characterized in that: needle roller roller block is multiple tooth engagement with between external tooth cam ring, left half axle frame and right axle shaft central gear, the needle roller roller block of 50% can be had at most to participate in joggleword simultaneously, therefore contact ratio is high, bearing capacity is high, can realize high-power, high pulling torque differential drive.
CN201610040182.4A 2016-01-21 2016-01-21 Automotive differential mechanism with needle roller and roller blocks driven by double-phase inner shock wave cam Pending CN105485294A (en)

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WO2011127229A2 (en) * 2010-04-07 2011-10-13 Synkinetics, Inc. Differential
CN105257801A (en) * 2015-11-04 2016-01-20 四川大学 Pure rolling type automobile differential mechanism
CN105257802A (en) * 2015-11-04 2016-01-20 四川大学 Internal gear driven type pure rolling automobile differential mechanism with random tooth difference

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CN105257801A (en) * 2015-11-04 2016-01-20 四川大学 Pure rolling type automobile differential mechanism
CN105257802A (en) * 2015-11-04 2016-01-20 四川大学 Internal gear driven type pure rolling automobile differential mechanism with random tooth difference

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Application publication date: 20160413