CN110185765A - A kind of differential mechanism automatic locking device - Google Patents
A kind of differential mechanism automatic locking device Download PDFInfo
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- CN110185765A CN110185765A CN201910396418.1A CN201910396418A CN110185765A CN 110185765 A CN110185765 A CN 110185765A CN 201910396418 A CN201910396418 A CN 201910396418A CN 110185765 A CN110185765 A CN 110185765A
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- Prior art keywords
- brake
- ball
- hole
- axle shaft
- shaft gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
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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
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/30—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means
- F16H48/34—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means using electromagnetic or electric actuators
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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
- F16H48/30—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means
- F16H48/34—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means using electromagnetic or electric actuators
- F16H2048/343—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means using electromagnetic or electric actuators using a rotary motor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Retarders (AREA)
Abstract
A kind of differential mechanism automatic locking device, it is characterised in that be made of open type differential, final gear, ball-screw, brake block, brake(-holder) block, reset spring, space washer, splined shaft, latch case.The diff lock is transformed according to open type differential, only increases automatic locking device to open type differential.A kind of diff lock can arrange in pairs or groups according to the specification of the inside friction plate, to form different locking rates.Differential locking fast response time, high sensitivity, limiting sliding ratio can realize that adjustable extent is wide according to the various combination of pressing plate and clutch-plate.The diff lock structure is simple, and easy to process, manufacturing cost is low, easy to assembly and high reliablity.
Description
Technical field
The invention belongs to mechanical transmission mechanism fields, and in particular to a kind of differential mechanism automatic locking device.
Background technique
Currently, needing setting differential mechanism on vehicle, differential mechanism can be such that left and right (or forward and backward) driving wheel realizes with difference
The mechanism of rotational speed.Its effect is to allow vehicle to drive at two when vehicle straight trip, turning round and crossing rugged road surface
Driving wheel revolving speed can continue to obtain the power of engine when identical, this is that the open type differential that present most of vehicles use can
With the function of reaching.
Open type differential is by planetary gear rotation, to offset the rotational speed difference of two side drive wheels, but due to opening
Planetary gear rotation in formula differential mechanism is free, but when coefficient of friction the rubbing than another side drive wheel of a side drive wheel
Wipe coefficient it is much lower when, the phenomenon that will appear skid using the low driving wheel of coefficient of friction in open type differential vehicle,
The high driving wheel of coefficient of friction does not turn then, prevents vehicle from moving ahead or getting rid of poverty.
In the related technology, the limited-slip differential of vehicle is mainly divided to passive limit sliding and actively limits sliding two classes, and active limited slip is poor
Structure is complicated for fast device, very high to control technology requirement, and has very strict requirements in the stability of product and consistency, this
Sample causes active limited slip differential in terms of Costco Wholesale all much higher than other kinds of differential mechanism.
Limited-slip differential is classified according to the sliding principle of passive limit, there are mainly two types of: one is torque induction type slide limiting differentials
Device, another kind are Speed sensing formula limited-slip differentials.Wherein friction of the speed type limited-slip differential generally by means of viscous fluid
Characteristic or special tooth profile realize the differential induction to driving wheels, but pass through the type from the point of view of Market Feedback and limit slippage
The function of fast device is simultaneously unsatisfactory；And the design structure more diversity of torque induction type limited-slip differential, superior performance, but
It is that design structure is complex.Therefore, it needs to develop performance of the novel limited-slip differential to improve existing limited-slip differential.
Summary of the invention
In view of this, the present invention is directed to propose a kind of differential mechanism, to solve the problems, such as differential design complexity and at high cost.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of differential mechanism automatic locking device, it is characterised in that by open type differential, final gear, ball-screw, brake
Piece, brake(-holder) block, reset spring, space washer, splined shaft, latch case composition；Two axle shaft gears of the differential mechanism
Respectively the first axle shaft gear, the second axle shaft gear, the axis of the first, second axle shaft gear are axially provided with through-hole, the first semiaxis
Internal spline, the not set internal spline of the through-hole of the second axle shaft gear are provided in the through-hole of gear；The axis of first axle shaft gear passes through
The cooperation of the external splines of internal spline and semiaxis, the axis of the second axle shaft gear and a side end face of latch case are affixed；It is described to open
The formula differential mechanism of putting is fixed on final gear；The ball-screw is made of ball screw and ball nut, steel ball, reverser,
The part of the not set ball grooves in ball screw both ends is respectively arranged with a fixed ring, and fixed ring is affixed with ball screw, fixed
The central axis of ring and the central axis of ball screw overlap, axially disposed in the fixed ring to have outer rim key teeth, outside
Edge key teeth is spacedly distributed along ball screw circumference, and outer rim key teeth cross section is rectangle, in the rectangle of outer rim key teeth and brake(-holder) block
The cooperation of edge keyway；The fixed ring is provided with toroidal cavity, toroidal cavity and reset bullet close to the side plane of ball nut
The one end fits of spring；Two side plane of ball nut is provided with compression ring, and compression ring is circular ring shape, compression ring central axis with
The central axis of ball nut overlaps；It is axially disposed on the compression ring periphery to have two groups of limit key teeths, two groups of limits
Position key teeth is spaced 180 degree on the circumferential surface, and every group of limit key teeth is made of two limit key teeths, limits key teeth along locking system shell
Body is axially arranged；The brake block is circular ring shape, and brake block outer edge is provided with multiple rectangular outer keyways, and brake block two sides are solid
Surely there is anti-abrasive material；The brake(-holder) block is circular ring shape, and brake(-holder) block inner edge is provided with multiple rectangular inner edge keyways；Two reset bullets
One end of spring is individually fixed in ball nut two sides, and the other end is set in the toroidal cavity of fixed ring side plane, described multiple
The central axis of position spring and the central axis of ball nut overlap；The space washer is circular ring shape, and space washer is horizontal
Section is rectangle or circle, is installed between two brake(-holder) blocks, close to ball screw periphery；The splined shaft setting external splines
Internal spline in the through-hole of one end and the first axle shaft gear cooperates, and the other end passes through the through-hole and ball spiral shell of the second side gear shaft
One end of bar is connect with ball screw, and splined shaft is identical and coaxial as the diameter of ball screw；The latch case is one
End seals and is provided with female splined shaft, and the other end is provided with the cylinder-like structure of through-hole, and latch case is provided with through-hole
One end and the axis of the second axle shaft gear are affixed, and the through-hole of the second axle shaft gear is communicated with the through-hole of latch case side and hole
Diameter is identical, and the other end and semiaxis pass through spline fitted；The latch case and open type differential shell are with main reducing gear
It takes turns plane to be symmetrical arranged for symmetrical plane, the inner peripheral surface of the latch case is axially provided with two groups of limit sliding rails, limit
Position sliding rail is fixed in the middle part of latch case inner peripheral surface, and two groups of limit sliding rails are spaced 180 degree, the limit on the circumferential surface
The limit key teeth being arranged on the compression ring of position sliding rail and ball nut cooperates；The inner peripheral surface at the latch case both ends point
It is not equidistantly provided with multiple locking key teeths, the cross section of locking key teeth is rectangle, and locking key teeth and brake block outer edge are arranged
Rectangular outer keyway cooperation.
Further, a kind of differential mechanism automatic locking device, it is characterised in that by open type differential, ball wire
Thick stick, brake block, brake(-holder) block, reset spring, space washer, splined shaft, latch case, driving motor, power supply unit composition；
Two axle shaft gears of the open type differential are respectively the first axle shaft gear, the second axle shaft gear, the first, second half axle gear
The axis of wheel is axially provided with through-hole, and spline is provided in the through-hole of the first axle shaft gear, is not set in the through-hole of the second axle shaft gear
Set spline；The axis of first axle shaft gear is cooperated by the external splines of internal spline and semiaxis, and the axis and locking of the second axle shaft gear fill
The side end face for setting shell is affixed；The ball-screw is made of ball screw and ball nut, steel ball, reverser, ball wire
The ball screw of thick stick and the transmission shaft of motor are coaxially affixed；Driving motor is fixed on not set through-hole one in latch case
On the transverse plane of side；One end of the not set spline of splined shaft is connected with a fixed ring, the central axis and splined shaft of fixed ring
Central axis overlap, axially disposed in the fixed ring to have rectangular outer key teeth, rectangular outer key teeth is along splined shaft
Periphery be spacedly distributed, rectangular outer key teeth cross section be rectangle, the rectangular inner edge key of rectangular outer key teeth and brake(-holder) block
Slot cooperation；Plane of the fixed ring close to ball nut side is provided with toroidal cavity, toroidal cavity and reset spring
One end fits；Be connected with compression ring on the ball nut outer circumference surface, compression ring is circular ring shape, compression ring central axis with
The central axis of ball nut overlaps；It is axially disposed on the compression ring outer circumference surface to have two groups of limit key teeths, two groups
Limit key teeth is spaced 180 degree on the circumferential surface, and every group of limit key teeth is made of two limit key teeths, and positive stop key tooth shaft is to setting；
The brake block is circular ring shape, and brake block outer edge is provided with multiple rectangular outer keyways, and brake block two sides are fixed with wear-resistant
Material；The brake(-holder) block is circular ring shape, and brake(-holder) block inner edge is provided with multiple rectangular inner edge keyways；One end of the reset spring
It is set to a side plane of the ball nut close to final gear, the other end is set to the toroidal cavity of fixed ring side plane
Interior, the central axis of reset spring and the central axis of splined shaft overlap；The space washer is circular ring shape, space washer
Cross section is rectangle or circle, is installed between two brake(-holder) blocks, close to splined shaft periphery；The splined shaft setting external splines
Internal spline in the through-hole of one end and the first axle shaft gear cooperates, and the other end passes through through-hole and the fixation of the axis of the second axle shaft gear
Ring is affixed；The latch case is that one end seals and be provided with female splined shaft, and the other end is provided with the cylindric knot of through-hole
Structure, latch case is provided with one end of through-hole and the axis of the second axle shaft gear is affixed, the through-hole and lock of the second axle shaft gear
The through-hole of locking apparatus housing side communicates and aperture is identical, and the other end and semiaxis pass through spline fitted；The latch case
It is symmetrical arranged with open type differential shell by symmetrical plane of final gear plane, the inner periphery of the latch case
Face is axially provided with two groups of limit sliding rails, and limit sliding rail is fixed in the middle part of latch case inner peripheral surface, and two groups of limits are sliding
Rail is spaced 180 degree on the circumferential surface, and the limit key teeth being arranged on the compression ring for limiting sliding rail and ball nut cooperates；It is described
Inner peripheral surface of the latch case close to final gear one end is equidistantly provided with multiple locking key teeths, lock key respectively
The cross section of tooth is rectangle, the rectangular outer keyway cooperation of locking key teeth and the setting of brake block outer edge.The power supply unit by
Slip ring structure, carbon brush structure, power supply, control unit, speed probe composition；Slip ring structure and carbon brush structure are fixed on locking dress
Shell periphery is set, connection is connected with motor leads for slip ring structure, and connection is connected with automobile power source for carbon brush structure, single by control
The conducting of member control power supply.
Compared with the existing technology, differential mechanism of the present invention has the advantage that
A kind of diff lock is transformed according to open type differential, only open type differential is given to increase automatic locking
Device.A kind of diff lock can arrange in pairs or groups according to the specification of the inside friction plate, to form different locks
Only rate.A kind of diff lock fast response time, high sensitivity, limiting sliding ratio can be according to different group of pressing plate and clutch-plate
It closes to realize, adjustable extent is wide.A kind of diff lock structure is simple, and easy to process, manufacturing cost is low, it is easy to assembly and
High reliablity.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of cross-sectional view of differential mechanism automatic locking device described in the embodiment of the present invention；
Fig. 2 is a kind of cross-sectional view perspective view of differential mechanism automatic locking device described in the embodiment of the present invention；
Fig. 3 is a kind of cross-sectional view 1 of differential mechanism automatic locking device described in the embodiment of the present invention；
Fig. 4 is a kind of cross-sectional view perspective view 1 of differential mechanism automatic locking device described in the embodiment of the present invention；
Description of symbols:
In figure, 1, planetary gear, 2, planetary gear shaft, the 3, first axle shaft gear, the 4, second axle shaft gear, the 5, first axle shaft gear
The through-hole of axis, 6, open type differential shell, 7, splined shaft, 8, final gear, 9, latch case, 10, locking key teeth,
11, brake block, 12, brake(-holder) block, 13, limit sliding rail, 14, compression ring, 15, limit key teeth, 16, reset spring, 17, fixed ring,
18, toroidal cavity, 19, the splined hole of female splined shaft, 20, the axis of the first axle shaft gear, 21, female splined shaft, 22, ball spiral shell
Mother, 23, ball screw, 24, rectangular outer key teeth, 25, rectangular inner edge keyway, 26, rectangular outer keyway.
Specific embodiment
Differential mechanism according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of differential mechanism automatic locking device, it is characterised in that by open type differential, final gear 8, ball-screw,
Brake block 11, brake(-holder) block 12, reset spring 16, space washer, splined shaft 7, latch case 9 form；The differential mechanism
Two axle shaft gears are respectively the first axle shaft gear 3, the second axle shaft gear 4, and the axis of the first, second axle shaft gear is axially provided with
Through-hole is provided with internal spline, the not set internal spline of through-hole of the second axle shaft gear 4 in the through-hole 5 of the first axle shaft gear；The first half
The axis 20 of shaft gear is cooperated by the external splines of internal spline and semiaxis, the axis of the second axle shaft gear and the one of latch case 9
Side end face is affixed；The open type differential is fixed on final gear 8；The ball-screw is by ball screw 23 and ball spiral shell
Mother 22, steel ball, reverser composition, the part of the not set ball grooves in 23 both ends of ball screw are respectively arranged with a fixed ring 17,
Fixed ring 12 and ball screw 23 are affixed, and the central axis of the central axis and ball screw 23 of fixed ring 12 overlaps, institute
State it is axially disposed in fixed ring 17 have outer rim key teeth 24, outer rim key teeth 24 is spacedly distributed along 23 circumference of ball screw, outer rim
24 cross section of key teeth is rectangle, the cooperation of rectangular inner edge keyway 25 of outer rim key teeth 24 and brake(-holder) block；The fixed ring 17 is close to rolling
The side plane of pearl nut 22 is provided with toroidal cavity 18, the one end fits of toroidal cavity 18 and reset spring 16；The rolling
22 liang of side planes of pearl nut are provided with compression ring 14, and compression ring 14 is circular ring shape, 14 central axis of compression ring and ball nut 22
Central axis overlap；It is axially disposed on 14 periphery of compression ring to have two groups of limit key teeths 15, two groups of positive stop keys
Tooth 15 is spaced 180 degree on the circumferential surface, and every group of limit key teeth 15 is made of two limit key teeths 15, and limit key teeth 15 is filled along locking
Set the axial setting of shell 9；The brake block 11 is circular ring shape, and 11 outer edge of brake block is provided with multiple rectangular outer keyways 26,
11 two sides of brake block are fixed with anti-abrasive material；The brake(-holder) block 12 is circular ring shape, and 12 inner edge of brake(-holder) block is provided with multiple rectangles
Inner edge keyway 25；One end of two reset springs 16 is individually fixed in 22 two sides of ball nut, and the other end is set to fixed ring 17
In the toroidal cavity of side plane, the central axis of the central axis and ball nut 22 of the reset spring 16 overlaps；
The space washer is circular ring shape, and space washer cross section is rectangle or circle, is installed between two brake(-holder) blocks 12, close to ball
23 periphery of screw rod；The splined shaft 7 is arranged the internal spline in one end of external splines and the through-hole 5 of the first axle shaft gear and cooperates,
The through-hole that the other end passes through the second side gear shaft 4 is connect with one end of ball screw 23 with ball screw 23, splined shaft 7 and rolling
The diameter of pearl screw rod 23 is identical and coaxial；The latch case 9 is that one end seals and is provided with female splined shaft 21, the other end
It is provided with the cylinder-like structure of through-hole, latch case 9 is provided with one end of through-hole and the axis of the second axle shaft gear 4 is affixed,
The through-hole of second axle shaft gear 4 is communicated with the through-hole of 9 side of latch case and aperture is identical, and the other end and semiaxis pass through flower
Key cooperation；The latch case 9 is symmetrically set with open type differential shell 6 using 8 plane of final gear as symmetrical plane
It sets, the inner peripheral surface of the latch case 9 is axially provided with two groups of limit sliding rails 13, and limit sliding rail 13 is fixed in locking dress
The middle part of 9 inner peripheral surface of shell is set, two groups of limit sliding rails are spaced 180 degree, the limit sliding rail 13 and ball spiral shell on the circumferential surface
The limit key teeth 15 being arranged on the compression ring 14 of mother 22 cooperates；Between the inner peripheral surface at 9 both ends of latch case waits respectively
Every being provided with multiple locking key teeths 10, the cross section of locking key teeth 10 is rectangle, and locking key teeth 10 is set with 11 outer edge of brake block
The rectangular outer keyway 26 set cooperates.
Further, a kind of differential mechanism automatic locking device, it is characterised in that by open type differential, ball wire
Thick stick, brake block 11, brake(-holder) block 12, reset spring 16, space washer, splined shaft 7, latch case 9, driving motor, power supply
Device composition；Two axle shaft gears of the open type differential are respectively the first axle shaft gear 3, the second axle shaft gear 4, and
One, the axis of the second axle shaft gear is axially provided with through-hole, and spline, the second half axle gear are provided in the through-hole 5 of the first axle shaft gear
Not set spline in the through-hole of wheel 4；The axis of first axle shaft gear 3 is cooperated by the external splines of internal spline and semiaxis, the second semiaxis
The axis of gear 4 and a side end face of latch case 9 are affixed；The ball-screw by ball screw 23 and ball nut 22,
Steel ball, reverser composition, the ball screw 23 and the transmission shaft of motor of ball-screw are coaxially affixed；Driving motor is fixed on lock
In locking apparatus shell 9 on the transverse plane of not set through-hole side；One end of the not set spline of splined shaft 7 is connected with a fixed ring
17, the central axis of the central axis and splined shaft 7 of fixed ring 17 overlaps, axially disposed in the fixed ring 17 to have square
Shape outer rim key teeth 26, rectangular outer key teeth 26 is spacedly distributed along the periphery of splined shaft 7, and 26 cross section of rectangular outer key teeth is
The rectangular inner edge keyway 26 of rectangle, rectangular outer key teeth 26 and brake(-holder) block 12 cooperates；The fixed ring 17 is close to ball nut 22
The plane of side is provided with toroidal cavity 18, the one end fits of toroidal cavity 18 and reset spring 16；The ball nut
It is connected with compression ring 14 on 22 outer circumference surfaces, compression ring 14 is circular ring shape, in 14 central axis of compression ring and ball nut 22
Mandrel line overlaps；It is axially disposed on 14 outer circumference surface of compression ring to have two groups of limit key teeths 15, two groups of limit key teeths
15 are spaced 180 degree on the circumferential surface, and every group of limit key teeth 15 is made of two limit key teeths 15, the axial setting of limit key teeth 15；
The brake block 11 is circular ring shape, and 11 outer edge of brake block is provided with multiple rectangular outer keyways 26, and 11 two sides of brake block are solid
Surely there is anti-abrasive material；The brake(-holder) block 12 is circular ring shape, and 12 inner edge of brake(-holder) block is provided with multiple rectangular inner edge keyways 25；It is described
One end of reset spring 16 is set to a side plane of the ball nut 22 close to final gear 8, and the other end is set to fixed ring
In the toroidal cavity 18 of 17 side planes, the central axis of the central axis and splined shaft 7 of reset spring 16 overlaps；It is described
Space washer is circular ring shape, and space washer cross section is rectangle or circle, is installed between two brake(-holder) blocks 12, close to splined shaft 7
Periphery；The splined shaft 7 is arranged the internal spline in one end of external splines and the through-hole 5 of the first axle shaft gear and cooperates, the other end
Through-hole and fixed ring 17 across the axis of the second axle shaft gear 4 is affixed；The latch case 9 is that one end seals and is provided with
Female splined shaft 21, the other end are provided with the cylinder-like structure of through-hole, and latch case 9 is provided with one end of through-hole and the second half
The axis of shaft gear 4 is affixed, and the through-hole of the second axle shaft gear 4 is communicated with the through-hole of 9 side of latch case and aperture is identical, separately
One end and semiaxis pass through spline fitted；The latch case 9 is with open type differential shell 6 with 8 plane of final gear
It is symmetrical arranged for symmetrical plane, the inner peripheral surface of the latch case 9 is axially provided with two groups of limit sliding rails 13, and limit is slided
Rail 13 is fixed in the middle part of 9 inner peripheral surface of latch case, and two groups of limit sliding rails are spaced 180 degree, the limit on the circumferential surface
The limit key teeth 15 being arranged on the compression ring 14 of position sliding rail 13 and ball nut 22 cooperates；The latch case 9 is close to main
The inner peripheral surface of 8 one end of reduction gearing is equidistantly provided with multiple locking key teeths 10 respectively, and the cross section of locking key teeth 10 is square
The rectangular outer keyway 26 of shape, locking key teeth 10 and the setting of 11 outer edge of brake block cooperates.The power supply unit by slip ring structure,
Carbon brush structure, power supply, control unit, speed probe composition；Slip ring structure and carbon brush structure are fixed on latch case circle
Connection is connected with motor leads for circumferential surface, slip ring structure, and connection is connected with automobile power source for carbon brush structure, controls electricity by control unit
The conducting in source.
The working principle of differential mechanism according to an embodiment of the present invention is analyzed below with reference to actual conditions.
When a kind of differential mechanism automatic locking device is installed on vehicle, vehicle revolver passes through semiaxis and latch case 9 one
When the female splined shaft 21 of side cooperates, vehicle right wheel is cooperated by semiaxis and 3 axis of the first axle shaft gear of 9 side of differential casing.
When left and right vehicle wheel wheel does not occur differential, relative rotation does not occur for the first axle shaft gear 3 and the second axle shaft gear 4, i.e., without rotational speed difference.
When revolver encounters wet-skid road surface or potted road surface, revolver frictional force is reduced, and revolving speed improves.At this time in open difference
Under the action of fast device, revolver revolving speed is promoted, and right wheel revolving speed is almost nil.There is when differential a kind of differential mechanism automatically in locking system
Start to intervene, the second axle shaft gear 4 drives latch case 9 to improve revolving speed, the first axle shaft gear 3 and the second axle shaft gear 4
Start differential occur.The limit sliding rail 13 being arranged in latch case 9 drives limit key teeth 15 and latch case shell
9 synchronous rotary of body limits the affixed ball nut 22 of key teeth 15.Ball nut 22 starts to rotate with the second axle shaft gear 4.Ball
Nut 22 starts under the action of ball screw 23 to mobile close to the side of final gear 8.It is set to until starting to compress
The brake(-holder) block 12 of 23 one end of ball screw, brake(-holder) block 12 compress brake block 11 immediately.Due to 11 rectangular outer keyway 26 of brake block
The locking key teeth 10 in latch case 9 is acted on, 12 rectangular inner edge keyway 25 of brake(-holder) block acts on the square in fixed ring 17
Shape outer rim key teeth 24, when the pressure between brake(-holder) block 12 and brake block 11 is sufficiently large, brake(-holder) block 12 is opposite with brake block 11
Rotation stops, i.e., brake(-holder) block 12 and brake block 11 are locked.Ball screw 23 is equivalent to affixed with latch case 9 at this time, the
One axle shaft gear 3 and the second axle shaft gear 4 are locked, are not in rotational speed difference, left and right wheel speed is identical, torque is identical, realizes
The automatic locking of differential mechanism.At the end of slipping phenomenon, in two sides, ball nut 22 automatically resets under the action of reset spring 16,
Return to the middle part of ball screw 23.
When right wheel encounters wet-skid road surface or potted road surface, right wheel frictional force is reduced, and revolving speed improves.At this time in open difference
Under the action of fast device, right wheel revolving speed rises, and revolver revolving speed is almost nil.A kind of differential mechanism automatic locking device is opened when there is differential
Begin to intervene, the first axle shaft gear 3 drives splined shaft 7 to improve revolving speed, the first axle shaft gear 3 by being set to the splined hole of its side
Start differential occur with the second axle shaft gear 4.Splined shaft 7 drives ball screw 23 to rotate, the rolling being set on ball screw 23
Pearl nut 22 is due to the common work by the limit sliding rail 13 in latch case 9 and the limit key teeth 15 on ball nut 22
It cannot rotate, can only be moved axially along limit sliding rail 13 under.Ball nut 22 is axially to far from main reducing gear at this time
The direction of wheel 8 is mobile, is set to brake(-holder) block 12 of the ball screw 23 far from 8 one end of final gear until starting to compress, brakes
Piece 12 compresses brake block 11 immediately.The locking in latch case 9 is acted on due to the rectangular outer keyway 26 of brake block 11
Key teeth 10,12 inner edge rectangle keyway of brake(-holder) block acts on the outer rim key teeth in fixed ring, when the pressure between brake(-holder) block and brake block
When power is sufficiently large, the relative rotation of brake(-holder) block 12 and brake block 11 stops, i.e., brake(-holder) block 12 and brake block 11 are locked.Ball at this time
Screw rod 23 is equivalent to affixed with latch case 9, and it is not in revolving speed that the first axle shaft gear 3 and the second axle shaft gear 4 are locked
Difference, left and right wheel speed is identical, torque is identical, realizes the automatic locking of differential mechanism.At the end of slipping phenomenon, resetted in two sides
Ball nut 22 automatically resets under the action of spring 16, returns to the middle part of ball-screw 23.
Further, a kind of differential mechanism automatic locking device, when any one wheel encounters wet-skid road surface or hollow road
When face, which is reduced, and revolving speed improves.The each wheel rotation speed signals transmitting that persistently will test due to speed probe
To control unit.When finding that rotational speed difference reaches a setting numerical value after control unit is to data processing, control unit is exported to electricity
Signal, power supply transmits electrical power to slip ring structure by carbon brush structure at this time, and slip ring structure is again by electrical energy transportation to motor, electricity
Motivation transmission shaft drives ball screw 23 to rotate.Limit sliding rail 13 in latch case 9 and the limit on ball nut 22
Under the collective effect of position key teeth 15, ball nut 22 is set towards close to the movement of the direction of final gear 8 until starting to compress
It is placed in the brake(-holder) block 12 of 7 one end of splined shaft, brake(-holder) block 12 compresses brake block 11 immediately.Brake(-holder) block 12 is being compressed with brake block 11
Frictional force increases under the action of ring 14, relatively rotates and stops.Since brake block 11 is filled by rectangular outer keyway 26 and locking
10 mutually locking of locking key teeth on shell 9 is set, brake(-holder) block 12 passes through the outer rim on rectangular inner edge keyway 25 and fixed ring 17
24 mutually locking of key teeth, it is not in rotational speed difference, left and right wheels that the first axle shaft gear 3 and the second axle shaft gear 4 are locked at this time
Revolving speed is identical, and output torque is also identical, realizes the automatic locking of differential mechanism.After differential mechanism locking, speed probe will be each
The real-time tach signal of wheel is conveyed to control unit, and control unit handles data, judges, and exports power-off signal, motor
Power-off, the ball screw 23 affixed with motor shaft stop operating.The elastic force of reset spring 16 is greater than ball screw at this time
Frictional force between 23 and ball nut 22, ball nut 22 is restored to initial position under the action of 16 power of reset spring, if
The compression ring 14 being placed on ball nut 22 does not apply pressure to brake(-holder) block 12, brake block 11.Entire differential locking process is complete
At.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (2)
1. a kind of differential mechanism automatic locking device, it is characterised in that by open type differential, final gear, ball-screw, brake
Vehicle piece, brake(-holder) block, reset spring, space washer, splined shaft, latch case composition；Two half axle gears of the differential mechanism
Wheel is respectively the first axle shaft gear, the second axle shaft gear, and the axis of the first, second axle shaft gear is axially provided with through-hole, and the first half
Internal spline, the not set internal spline of the through-hole of the second axle shaft gear are provided in the through-hole of shaft gear；The axis of first axle shaft gear is logical
The external splines for crossing internal spline and semiaxis cooperates, and the axis of the second axle shaft gear and a side end face of latch case are affixed；It is described
Open type differential is fixed on final gear；The ball-screw is by ball screw and ball nut, steel ball, reverser group
At, the part of the not set ball grooves in ball screw both ends is respectively arranged with a fixed ring, and fixed ring is affixed with ball screw, Gu
The central axis of the central axis and ball screw of determining ring overlaps, axially disposed in the fixed ring to have outer rim key teeth,
Outer rim key teeth is spacedly distributed along ball screw circumference, and outer rim key teeth cross section is rectangle, the rectangle of outer rim key teeth and brake(-holder) block
The cooperation of inner edge keyway；The fixed ring is provided with toroidal cavity, toroidal cavity and reset close to the side plane of ball nut
The one end fits of spring；Two side plane of ball nut is provided with compression ring, and compression ring is circular ring shape, compression ring central axis
It overlaps with the central axis of ball nut；It is axially disposed on the compression ring periphery to have two groups of limit key teeths, two groups
Limit key teeth is spaced 180 degree on the circumferential surface, and every group of limit key teeth is made of two limit key teeths, limits key teeth along locking system
Shell is axially arranged；The brake block is circular ring shape, and brake block outer edge is provided with multiple rectangular outer keyways, brake block two sides
It is fixed with anti-abrasive material；The brake(-holder) block is circular ring shape, and brake(-holder) block inner edge is provided with multiple rectangular inner edge keyways；Two resets
One end of spring is individually fixed in ball nut two sides, and the other end is set in the toroidal cavity of fixed ring side plane, described
The central axis of reset spring and the central axis of ball nut overlap；The space washer is circular ring shape, space washer
Cross section is rectangle or circle, is installed between two brake(-holder) blocks, close to ball screw periphery；External splines is arranged in the splined shaft
One end and the first axle shaft gear through-hole in internal spline cooperate, the other end pass through the second side gear shaft through-hole and ball
One end of screw rod is connect with ball screw, and splined shaft is identical and coaxial as the diameter of ball screw；The latch case is
One end seals and is provided with female splined shaft, and the other end is provided with the cylinder-like structure of through-hole, and latch case is provided with through-hole
One end and the second axle shaft gear axis it is affixed, the through-hole of the second axle shaft gear communicated with the through-hole of latch case side and
Aperture is identical, and the other end and semiaxis pass through spline fitted；The latch case and open type differential shell are with main deceleration
Gear plane is symmetrical arranged for symmetrical plane, and the inner peripheral surface of the latch case is axially provided with two groups of limit sliding rails,
Limit sliding rail is fixed in the middle part of latch case inner peripheral surface, and two groups of limit sliding rails are spaced 180 degree on the circumferential surface, described
The limit key teeth being arranged on the compression ring of limit sliding rail and ball nut cooperates；The inner peripheral surface at the latch case both ends
It is equidistantly provided with multiple locking key teeths respectively, the cross section of locking key teeth is rectangle, and locking key teeth is set with brake block outer edge
The rectangular outer keyway cooperation set.
2. a kind of differential mechanism automatic locking device according to claim 1, it is characterised in that by open type differential, ball
Lead screw, brake block, brake(-holder) block, reset spring, space washer, splined shaft, latch case, driving motor, power supply unit group
At；Two axle shaft gears of the open type differential are respectively the first axle shaft gear, the second axle shaft gear, and the first, second half
The axis of shaft gear is axially provided with through-hole, is provided with spline in the through-hole of the first axle shaft gear, in the through-hole of the second axle shaft gear
Not set spline；The axis of first axle shaft gear is cooperated by the external splines of internal spline and semiaxis, the axis and lock of the second axle shaft gear
One side end face of locking apparatus shell is affixed；The ball-screw is made of ball screw and ball nut, steel ball, reverser, rolling
The ball screw of ballscrew and the transmission shaft of motor are coaxially affixed；Driving motor is fixed on not set logical in latch case
On the transverse plane of hole side；One end of the not set spline of splined shaft is connected with a fixed ring, the central axis and flower of fixed ring
The central axis of key axis overlaps, and axially disposed in the fixed ring to have rectangular outer key teeth, rectangular outer key teeth is along flower
The periphery of key axis is spacedly distributed, and rectangular outer key teeth cross section is rectangle, in the rectangle of rectangular outer key teeth and brake(-holder) block
The cooperation of edge keyway；Plane of the fixed ring close to ball nut side is provided with toroidal cavity, toroidal cavity and reset
The one end fits of spring；Compression ring is connected on the ball nut outer circumference surface, compression ring is circular ring shape, compression ring central axis
The central axis of line and ball nut overlaps；It is axially disposed on the compression ring outer circumference surface to have two groups of limit key teeths,
Two groups of limit key teeths are spaced 180 degree on the circumferential surface, and every group of limit key teeth is made of two limit key teeths, positive stop key tooth shaft to
Setting；The brake block is circular ring shape, and brake block outer edge is provided with multiple rectangular outer keyways, and brake block two sides are fixed with
Anti-abrasive material；The brake(-holder) block is circular ring shape, and brake(-holder) block inner edge is provided with multiple rectangular inner edge keyways；The reset spring
One end be set to a side plane of the ball nut close to final gear, the other end is set to the circular ring shape of fixed ring side plane
In groove, the central axis of reset spring and the central axis of splined shaft overlap；The space washer is circular ring shape, interval
Washer cross section is rectangle or circle, is installed between two brake(-holder) blocks, close to splined shaft periphery；The outer flower of splined shaft setting
Internal spline in the through-hole of one end of key and the first axle shaft gear cooperates, the other end pass through the through-hole of the axis of the second axle shaft gear with
Fixed ring is affixed；The latch case is that one end seals and is provided with female splined shaft, and the other end is provided with the cylinder of through-hole
Shape structure, latch case is provided with one end of through-hole and the axis of the second axle shaft gear is affixed, the through-hole of the second axle shaft gear
It is communicated with the through-hole of latch case side and aperture is identical, the other end and semiaxis pass through spline fitted；The locking system
Shell and open type differential shell are symmetrical arranged by symmetrical plane of final gear plane, the latch case it is interior
Periphery is axially provided with two groups of limit sliding rails, and limit sliding rail is fixed in the middle part of latch case inner peripheral surface, two groups of limits
Position sliding rail is spaced 180 degree on the circumferential surface, and the limit key teeth being arranged on the compression ring for limiting sliding rail and ball nut cooperates；
Inner peripheral surface of the latch case close to final gear one end is equidistantly provided with multiple locking key teeths respectively, lock
Only the cross section of key teeth is rectangle, the rectangular outer keyway cooperation of locking key teeth and the setting of brake block outer edge.It is described for Denso
It sets and is made of slip ring structure, carbon brush structure, power supply, control unit, speed probe；Slip ring structure and carbon brush structure are fixed on lock
Connection is connected with motor leads for locking apparatus shell periphery, slip ring structure, and connection is connected with automobile power source for carbon brush structure, by controlling
The conducting of unit control power supply processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910396418.1A CN110185765A (en) | 2019-05-14 | 2019-05-14 | A kind of differential mechanism automatic locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910396418.1A CN110185765A (en) | 2019-05-14 | 2019-05-14 | A kind of differential mechanism automatic locking device |
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| Publication Number | Publication Date |
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| CN110185765A true CN110185765A (en) | 2019-08-30 |
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ID=67716137
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|---|---|---|---|
| CN201910396418.1A Pending CN110185765A (en) | 2019-05-14 | 2019-05-14 | A kind of differential mechanism automatic locking device |
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| CN (1) | CN110185765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111873711A (en) * | 2020-07-03 | 2020-11-03 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
-
2019
- 2019-05-14 CN CN201910396418.1A patent/CN110185765A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111873711A (en) * | 2020-07-03 | 2020-11-03 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
| CN111873711B (en) * | 2020-07-03 | 2021-10-29 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
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Application publication date: 20190830 |
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