CN86201676U - Auger-type differential mechanism - Google Patents
Auger-type differential mechanism Download PDFInfo
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- CN86201676U CN86201676U CN 86201676 CN86201676U CN86201676U CN 86201676 U CN86201676 U CN 86201676U CN 86201676 CN86201676 CN 86201676 CN 86201676 U CN86201676 U CN 86201676U CN 86201676 U CN86201676 U CN 86201676U
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Abstract
The utility model provides an auger-type differential mechanism which can rationally assign the driving torques of motor cars. The auger-type differential mechanism comprises a transmission screw pair and a mating spline structure. The utility model is characterized in that it can rationally assign the driving torques of the motor cars to the left and the right two driving wheels, which overcomes the situation of which one driving wheel of the motor cars slides and the other driving wheel is immovable on tough road because the torque is assigned in average in existing ordinary planetary wheel differential mechanisms and improves the skidproof performance of the motor cars. The utility model has favorable differential mechanism function and skidproof performance, and is suitable for various automotive vehicles, in particular to go anywhere vehicles which often run on various tough roads.
Description
The utility model relates to the novel differential mechanism of a kind of automobile, tractor driving torque reasonable distribution.Particularly vehicle can make full use of the useful horsepower of motor in the rural area, when low class pavement outside of the city travels, and improves the performance of passing through of vehicle.
At present the differential mechanism of domestic and international application has several types: 1. planetary gear type differential mechanism.It is present most widely used one type of differential mechanism.This type of differential mechanism under any working condition moment of torsion always mean allocation give left and right sidesing driving wheel.Because moment of torsion can not get reasonable distribution.The adhesion of driving wheel is not fully utilized.Vehicle is restricted in the performance of passing through that low class pavement travels.2. force pinning formula differential mechanism.Be on the planet gear differential, to add a differential lock, when driving wheel skids, make differential mechanism not play differential action.This differential mechanism is locked, is plucked lock and handles inconvenience, occurs a series of problems under the indifferential effect situation after locking.3. dental formula differential, service behaviour is unreliable, and wearing and tearing are big, noise is high, and by the differential design decision, vehicle can not backward.4. the high friction of slider cam formula differential mechanism, its torque distribution realizes that by the friction between slide block and interior external cam its differential performance and non-skid property oppose, serious wear, machinery driving efficiency is low.
The purpose of this utility model be for provide a kind of can be with the moment of torsion reasonable distribution of the motor spiral differential mechanism to the driving wheel.Overcome the defective of all kinds differential mechanism existence of present application, solved the differential and the anti-skidding problem that can not take into account of differential mechanism.
The utility model mainly is made up of a pair of drving sprial pair and a pair of spline pair.Guarantee on the structure that car two side drive wheel rotating speeds all are not less than motor and pass to rotating speed on the driving wheel by velocity ratio.And ceiling structure system two side drive wheel can only have the rotating speed of single wheel to be higher than this rotating speed.So both guaranteed the differential performance of differential mechanism.Guaranteed simultaneously the non-skid property of differential mechanism again.Do not cause motor and two side drive wheel to break away from transmission simultaneously again.Parts of the present utility model are mostly axial arranged, and compact structure increases the clearance of car, has improved the performance of passing through of vehicle.
Structure of the present utility model: Fig. 1 is the section of structure of this differential mechanism.1. be semiaxis, 2. taper pin, 3. screw axis, 5. 4. elastic sheet rubber goes here and there moving axis, 6. holddown spring, 7. spline housing, 8. connecting bolt and nut, 9. circular cone helical gear, 10. housing.Fig. 2 is the screw pair floor map.1. screw rod, 2. nut.Fig. 3 is the disintegration figure of this differential mechanism.
Below in conjunction with accompanying drawing structure of the present utility model is elaborated, spline housing is fixed on the helical gear middle part of circular cone (being all-in-one-piece), has hole, several places ventilative (or oil) near its middle part.It is that spline, the other end are that (the differential mechanism left end is dextrorotation to the certain rotation direction of bull that the string moving axis is made an end.Right-hand member is left-handed) transmission nut.String moving axis nut ora terminalis connects an elastic sheet rubber, screw axis one end is that (the differential mechanism left end is dextrorotation to the certain rotation direction of bull, right-hand member is left-handed) drive screw, the other end is a spline housing, the spline engagement of spline housing and semiaxis, slide with the taper pin restrictive axial, it is as a whole that semiaxis is connected with screw axis.Holddown spring makes string moving axis nut end lean drving sprial end at screw axis all the time, so require the rigidity of spring little, the effect of elastic sheet rubber is after screw pair (screw rod and nut) enters engagement, prevents from mesh dead, withdraws from difficulty when meshing.Each surface of contact of screw pair outer end tooth head is all made transition circle arc (see figure 2), and purpose is to reduce differential mechanism when playing differential action.Make slide relative and the noise and the impact that produce by the outer end tooth head of screw rod and nut, because the pressure of holddown spring is not very big, adding has differential oil in the differential mechanism, so differential mechanism noise and to impact be very little when playing differential action.
Working principle of the present utility model: when the automobile straight-line travelling, the moment of torsion that motor sends is passed to the circular cone helical gear through ransaxle, and the circular cone helical gear is given left and right two string moving axis torque distribution by the spline housing that is connected with it.After screw pair enters engagement, again moment of torsion is passed to semiaxis, up to passing to the wheel drive automobile running.String moving axis nut and screw rod axial screw are all made bull, and the spiral part of screw axis is very short, does not just enter or withdraw from engagement so that screw pair turns over relatively after the wide-angle.The maximum separately extending amount of two string moving axis is: when screw pair was in engagement, screw axis spiral head was to the distance of elastic sheet rubber.When differential mechanism is installed, make the afterbody (being spline one end) of two string moving axis lean middle part at spline housing, and the spiral of another spiral end of string moving axis, the amount that should screw in nut is half near string moving axis extending amount.
When motor turning, as turning left, at this moment the left part wheel has the trend of slow-speed, and the right part wheel has the trend of fast commentaries on classics, and left side wheel should be in drive condition, and the rotating speed of right side wheels is faster than left side wheel.Be the rotating speed that the rotating speed of right axle shaft is greater than right string moving axis, at this moment the screw rod of right part screw pair and nut withdraw from engagement on the spot, and right side wheels is not born driving torque, and the moment of torsion that motor passes to ransaxle just all is assigned to the left part wheel.Left and right wheel can have different rotating speeds.Play differential action.When turning to end, during the automobile straight-line travelling, the holddown spring of differential mechanism inside will be gone here and there moving axis and will be pressed against an end of screw axis, because at this moment right driving wheel does not temporarily have driving force and passes to, vehicle wheel rotational speed must also less than the left side wheel rotating speed, be in the state of rolling that drags less than the spline housing rotating speed.The left part wheel is in the skid state of driven, because drving sprial is a bull, and its extending amount is little, make the right part wheel be in drive condition very soon, be that the right part screw pair enters engagement very soon, motor part moment of torsion is passed to the right part wheel, two driving wheels are driven simultaneously, all be in drive condition, keep straight-line travelling.
When automobile bent to right, situation was opposite with above-mentioned situation just, is that left part string moving axis withdraws from engagement, enters engagement behind straight-line travelling again, and the right part wheel is in drive condition always.
No matter automobile is parked on the sloping road or when quickening coast, and when promptly vehicle wheel rotational speed was greater than the rotating speed of differential mechanism spline housing, this differential mechanism can keep driving wheel not break away from motor.Driving motor changes soon; For example, automobile is when descent run, and under the effect of sliding force, automobile does not quicken.Vehicle wheel rotational speed will have the trend greater than the rotating speed of spline housing in the differential mechanism, and promptly the rotating speed of semiaxis will be greater than the rotating speed of string moving axis.Make left and right two string moving axis have the trend that outwards withdraws from simultaneously.But can not withdraw from fully.Here it is (preceding set forth) that guarantee by the mounting distance between them, can only withdraw from go here and there separately the moving axis extending amount nearly half part or about mutually compensation withdraw from.Because at this moment, string moving axis splined end has withstood on together, and spiral can not be withdrawed from fully, and left and right half can only be with identical speed such as unitary rotation with left and right string moving axis.At this moment be exactly that semiaxis drives the string moving axis again by spline housing and some driving mechanisms, driving motor changes soon.
Automobile is when going up a slope parking, the power screw pair of left and right two string moving axis and screw axis all has the trend of the engagement of entering, driving wheel and motor do not break away from, and hand braking is the rotation of brake engine rear portion driving mechanism, at this moment hand braking will be effective to the braking of whole automobile.
When automobile stopped in the downhill path, the trailing wheel that comes to the same thing during with the automobile free-wheel of above-mentioned analysis did not break away from motor, and hand braking braking to automobile is still effective.
When driving wheel of automobile skidded, the moment of torsion of motor was given non-slip wheel with major part, made automobile have the bigger performance of passing through, and took turns when unsettled when automobile driving wheel one, and motor will be passed to all torsion torque does not have unsettled wheel.Because at this moment left and right two-wheeled does not all have fast trend of changeing, and all is to rotate under the driving of Engine torque, thereby it is more reasonable that the torque distribution of driving wheel is got, and improved the performance of passing through of automobile.
For example, during automobile right part wheel-slip, the moment of torsion of motor is distributed to a left side simultaneously, right two string moving axis, at this moment two power screw pairs all are in engagement driving state (see figure 2) about, and the resistance moment of torsion that the string moving axis of right part bears is little, the resistance moment of torsion that the left part wheel bears is big, because these two string moving axis are moments of torsion of being passed to by same spline housing, drive two string moving axis to rotate rigidly with speed, bear the big wheel of resistance moment of torsion like this and will be assigned to most Engine torque, be that the left part wheel is assigned to most of moment of torsion, the right part wheel is assigned to the fraction moment of torsion, does not go out phenomenon satellite differential such and takes turns and skid, one takes turns the phenomenon of stall.
When travel in the straight rear of rolling-back of car, the situation the when working state of differential mechanism slides with automobile downhill is the same, but at this moment left and right two driving wheels can both obtain driving force.When being the ransaxle counterrotating, drive the spline housing counterrotating in the differential mechanism, and wheel is static before not obtaining driving force, semiaxis does not change yet like this, so just make left and right two string moving axis spirals outwards withdraw from from engagement simultaneously, but can not all withdraw.So semiaxis is counterrotating together under the drive of differential mechanism.
When automobile when travel in the left back, the resistance moment of torsion that automobile left part driving wheel bears is big, and right part resistance moment of torsion is very little, thus energy the force rate right part that left part string moving axis withdraws from by force, make the left part semiaxis be in disengaged position.And the right part semiaxis is in drive condition, and at this moment the working state during right steering is identical before the working state of differential mechanism and the automobile.
When automobile when travel in the right back, the situation when left steering travels before the working state of differential mechanism and the automobile is identical.
The performance of the utility model and existing several types differential mechanism compares: 1. present widely used open differential, its inner friction torque is very little, can think in fact no matter whether the left and right sidesing driving wheel rotating speed equates.And moment of torsion mean allocation always.For example when driving wheel of automobile touches slippery ground (mire or ice and snow road).Though another wheel is that often automobile still can not advance on good road surface.This moment, the wheel on slippery ground trackslipped in the original place, and the wheel transfixion on good road surface, Here it is because, very little at wheel on the slippery ground and the adhesion between the road surface, the road surface can only be very little to the semiaxis effect reaction torque (resistance moment of torsion), though the adhesion between another wheel and good road surface is bigger.But characteristics because of open differential mean allocation moment of torsion, the moment of torsion that this wheel is assigned to can only equate with the moment of torsion on passing to the driving wheel that trackslips, so that total tractive force is not enough to overcome running resistance, automobile just can not advance, spiral differential mechanism is owing to can reasonably distribute to the and arranged on left and right sides driving wheel to the moment of torsion that live axle transmits, bear that the driving torque that resistance moment of torsion big driving wheel assigns to is big, to bear the moment of torsion that the little driving wheel of resistance moment of torsion assigns to little, so can address the above problem well.After automobile adopted spiral differential mechanism, when a driving wheel of automobile touches slippery ground, and another was taken turns when good road surface, and then two driving wheels are all with the speed rotation; Automobile still can be in effective drive condition to be continued to move ahead, one driving wheel skids when having overcome the employing satellite differential, another driving wheel transfixion, and make the appearance of the phenomenon that automobile can not advance 2. adopt open differential, automobile is restricted by the driveability on bad road, in order to improve the passing capacity of offroad vehicle on bad road, the common starting point of people in long-term practice all is that idea is when a driving wheel trackslips, make most of moment of torsion even all torsion torque pass to the wheel that does not trackslip, producing enough tractive force with the adhesion that makes full use of this driving wheel makes automobile can continue to travel in order to realize above-mentioned requirements, people had once found out such way, exactly when a driving wheel skids, allow open differential not play differential action, concrete way is that differential lock is set on differential mechanism, promptly becomes to force pinning formula differential mechanism.And after common planetary gear type differential mechanism has added differential lock, brought very big inconvenience to automobile operation.Handling differential lock generally will carry out after parking, after adding differential lock, make automobile lose differential action, if and connect or take evening excessively differential lock too early, that is the left and right driving wheel still is rigidly connected on good highway section, then will produce a series of problems that occur under the automobile indifferential device situation.And spiral differential mechanism does not promptly need to stop, and does not need other Effector to control differential mechanism yet, and it can automatically change the torque distribution between each driving wheel according to the road surface situation that runs in the running process.3. people have also developed the anti-skidding problem that solves automobile as dental formula differential and the high friction of slider cam formula differential mechanism etc. in the long-term production practice.But these limited slip differential still exist disadvantage more or less, all fail to satisfy people's wish.
The dental formula differential service behaviour is unreliable, wearing and tearing and noise are all bigger, and when automobile downhill slides or stop, wheel semiaxis and live axle produce break-off, and be when descending stops, hand braking to after the live axle braking, automotive wheel still slides downwards, so hand brake device must be installed on wheel or the semiaxis, can be effective to automobile brake, so just make hand braking handle structure complexity.The manipulation path is long, has reduced the reliability of braking.
Dental formula differential is from structure, driving disc just changes when automobile moves ahead, driving left and right two driven discs just changes, and when rolling-back of car, the driving disc counter-rotating, inevitable alveolus and the driving disc all will jumped out of left and right two driven discs produces slip, driving disc then can not drive two driven disc rotating vehicles and can not go the back, be that automobile can not be moveed backward, this is because during motor turning, changing trains or buses soon to take turns only needs little moment of torsion will make driven disc jump out the alveolus of driving disc, and the moment of torsion to driven disc that produces when driving disc reverses surpasses this moment of torsion widely.So the inevitable alveolus that all can jump out driving disc of left and right two driven discs, and spiral differential mechanism has overcome the above-mentioned problem that occurs, and is desirable differential mechanism.
Between the slide block of the high friction of slider cam formula differential mechanism and interior external cam bigger friction is arranged, machinery driving efficiency is descended, when arbitrary driving wheel trackslips, the moment of torsion that motor transmits is to realize by the friction between slide block and interior external cam to the distribution of the wheel torque that do not trackslip, if and this friction when very big to anti-skidding beneficial, but on the other hand, reduced the differential performance of differential mechanism, make a left side, right two-semiaxle rigidization, when motor turning, the friction of slide block and wheel is all very serious, and the working efficiency of automobile reduces when making motor turning, and energy consumption increases; When friction between slide block and interior external cam reduced, the differential performance of differential mechanism improved, but the non-skid property of automobile but descends.
There is not the contradiction of such opposition in the spiral differential mechanism, and its skid resistance and differential do not disturb not only differential performance height mutually, and non-skid property, has fundamentally guaranteed the differential of differential mechanism and anti-skidding reliability.
The outstanding feature of spiral differential mechanism is exactly to utilize the moment of torsion that motor transmits differential mechanism reasonably to distribute to left and right two driving wheels, has made full use of the moment of torsion of automobile, has alleviated driver's operation burden.Simultaneously, because each constituent element of spiral differential mechanism all axial arranged, so can also reduce the volume that bag (differential carrier) is pressed in the back, has increased gap between ground and automobile, improved the cross-country ability of automobile effectively, this differential mechanism all is suitable for various motor vehicle.To offroad vehicle is even more ideal differential mechanism.
Claims (1)
- A kind of spiral differential mechanism has a band spline housing (7), accepts to drive the circular cone helical gear (9) of square, and the shell and this circular cone helical gear that contain differential mechanism are fixed together.It is characterized in that: the assembly of differential mechanism distributes about symmetrically in spline housing, string moving axis (5) one ends are spline rod, cooperate with spline housing (7), the other end is a transmission nut, between string moving axis and the spline housing spring (6) is housed, and screw axis (3) one ends are spline housing, the other end is a drive screw, screw rod cooperates with the nut of string moving axis, and the splined end of semiaxis cooperates with the spline housing end of screw axis, and with taper pin semiaxis and screw axis being connected is an integral body.The circular cone helical gear is divided into left and right sides two-part with differential mechanism, two-part parts except that the rotation direction of screw pair on the contrary, all the other are symmetry all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86201676 CN86201676U (en) | 1986-03-22 | 1986-03-22 | Auger-type differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86201676 CN86201676U (en) | 1986-03-22 | 1986-03-22 | Auger-type differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86201676U true CN86201676U (en) | 1987-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86201676 Ceased CN86201676U (en) | 1986-03-22 | 1986-03-22 | Auger-type differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86201676U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332142C (en) * | 2004-09-28 | 2007-08-15 | 曹相照 | Screw self locking differential mechanism |
| CN101559564B (en) * | 2009-04-24 | 2010-12-08 | 无锡桥联数控机床有限公司 | Installing structure of spline shaft with attached cutting head |
| CN103004380A (en) * | 2013-01-22 | 2013-04-03 | 苏州博田自动化技术有限公司 | Drive device with differential part |
| CN104948707A (en) * | 2015-06-30 | 2015-09-30 | 南平市建阳区汽车锻压件厂 | Differential anti-slip structure with vibration absorption structures |
| CN105480219A (en) * | 2015-12-30 | 2016-04-13 | 吉林东光奥威汽车制动系统有限公司 | Automobile electronic parking brake |
-
1986
- 1986-03-22 CN CN 86201676 patent/CN86201676U/en not_active Ceased
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332142C (en) * | 2004-09-28 | 2007-08-15 | 曹相照 | Screw self locking differential mechanism |
| CN101559564B (en) * | 2009-04-24 | 2010-12-08 | 无锡桥联数控机床有限公司 | Installing structure of spline shaft with attached cutting head |
| CN103004380A (en) * | 2013-01-22 | 2013-04-03 | 苏州博田自动化技术有限公司 | Drive device with differential part |
| CN103004380B (en) * | 2013-01-22 | 2015-08-19 | 苏州博田自动化技术有限公司 | There is the drive unit of differential part |
| CN104948707A (en) * | 2015-06-30 | 2015-09-30 | 南平市建阳区汽车锻压件厂 | Differential anti-slip structure with vibration absorption structures |
| CN105480219A (en) * | 2015-12-30 | 2016-04-13 | 吉林东光奥威汽车制动系统有限公司 | Automobile electronic parking brake |
| CN105480219B (en) * | 2015-12-30 | 2019-03-12 | 吉林东光奥威汽车制动系统有限公司 | A kind of automotive electronic parking brake |
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