CN104960401B - Electric back-door opening and closing mechanism of automobile - Google Patents
Electric back-door opening and closing mechanism of automobile Download PDFInfo
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- CN104960401B CN104960401B CN201510372403.3A CN201510372403A CN104960401B CN 104960401 B CN104960401 B CN 104960401B CN 201510372403 A CN201510372403 A CN 201510372403A CN 104960401 B CN104960401 B CN 104960401B
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- back door
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Abstract
The invention relates to an electric back-door opening and closing mechanism of an automobile. The electric back-door opening and closing mechanism comprises an outer tube and an inner tube, wherein a sliding connector for being connected with a back door is fixed at one end of the inner tube, and the other end of the inner tube extends into the outer tube to be in sliding fit with the outer tube; a driving motor is fixed in the outer tube; the driving motor is connected with a threaded rod, and the threaded rod is driven by the driving motor to rotate; a guide nut is in threaded fit to the screw rod; the inner tube is driven to axially slide in the outer tube through the guide nut; a spring sleeves the guide nut; a fixed connector for being connected with a roof drip channel of an automobile body is fixed on the outer tube; a sliding friction gap between the outer tube and the inner tube is determined by the using efficiency of a motor assembly and the manual operation force of the motor assembly. The motor assembly of the electric back-door opening and closing mechanism of the automobile is the highest in using efficiency, the motor is long in service life, and is reasonable in manual operation force.
Description
Technical field
The present invention relates to technical field of automobile parts, more particularly to a kind of motorcar electric back door switching mechanism.
Background technology
At present, automotive back door is used mostly and is fixed on the auxiliary structure that rotates on vehicle top and realizes the rotating open-close of car door,
Electronic back door switching mechanism is then that bilateral installs a kind of motor spring structure：One end is coupled with vehicle body, and the other end is joined with car door
Connect, the opening and closing of car door is realized by the rotation of motor.Although the structure simple possible, the vehicle of existing market face one
Series of problems, for example：1st, motor assembly service efficiency is too high, and the presence of this kind of situation is caused inside electronic back door switching mechanism
The service life of motor is short so that most of auto vendors meet the service life of customer using more powerful motor will
Ask, the use of heavy-duty motor causes motor external diameter to increase, so that electronic back door switching mechanism entire outer diameter becomes big, so
And the very limited adjustment that cannot realize outward appearance of car load type face shaping of automobile depot；2nd, manual operation power is excessive so that turn round and look at
Visitor is difficult in manually opened and closed door, or even old man, teenager etc. cannot be realized manually opened or be closed, when at some
Time of crisis, the opening and closing of arrangements for automotive doors decide the safety of life and property, so rational manual operation power will be automobile city
The core of field competition.
The content of the invention
In order to overcome the above-mentioned deficiency of prior art, the present invention to provide a kind of motorcar electric back door switching mechanism, the vapour
The motor assembly service efficiency of car electronic back door switching mechanism is optimum, the long service life of motor, and manual operation power is reasonable.
The technical scheme is that：A kind of electronic back door switching mechanism, including outer tube and inner core, the one of the inner core
End is fixed for connecting the slip joint of back door, and the other end of inner core is slidably matched with outer tube in stretching into outer tube, the outer tube
Motor is inside fixed with, the motor is connected with screw rod, drives screw rod to rotate, screw thread is combined with guiding on the screw rod
Nut, drives inner core in outer tube interior axle to slip by spigot nut, is cased with spring on the spigot nut, and the outer tube is fixed
For connecting the anchor tip of vehicle body gutter channel, the sliding friction gap between the outer tube and inner core is by motor assembly using effect
Rate and manual operation power determine that the sliding friction gap is less than or equal to motor safety for meeting motor assembly service efficiency simultaneously
The electronic back door opening and closing of efficiency and manual operation power less than or equal to maximum both conditions of manual operation power setting
The sliding friction gap between outer tube and inner core corresponding to the internal friction of mechanism.
The outer tube inner wall is fixed with slide bushing, and the other end of inner core stretches into the slide bushing in outer tube with outer tube inner wall
It is slidably matched.Preferably, slide bushing is removably secured with outer tube and is connected, and is easily installed slide bushing.
The spigot nut is fixedly connected with slip joint.
The spigot nut is provided with shoulder hole, and the screw rod is coordinated with the path section screw thread of shoulder hole, set on the screw rod
Some boss, the boss are slidably matched with the big footpath section of shoulder hole, by inner core spacing in outer tube, the slip joint and guiding
The shoulder hole bigger diameter end of nut is fixedly connected.
On screw rod, spigot nut, spring one end is located in outer tube the spring housing, and one end is located in inner core.
Electronic back door switching mechanism internal friction fθCharacteristic equation with motor assembly service efficiency η is：
Wherein, FMScrew rod axial force, F are acted on for motor assemblySFor acting force of the spring, fθFor internal friction, δ is opening and closing
Mechanism and XZ planes position phase, LPLGFor the arm of force of switching mechanism, m is car door quality, and g is acceleration of gravity, LOGArrive for car door center of gravity
Rotate secondary distance, θ is car door opening angle, θGOFor car door center of gravity initial bit phase, JGFor car door rotary inertia, η is motor assembly
Service efficiency, C be switching mechanism gearing factor, i be motor assembly gear ratio, u be motor assembly terminal voltage, U0It is total for motor
Into voltage, n is motor assembly velocity of rotation, n0For the idle speed under motor assembly voltage, TNIt is stifled under for motor assembly voltage
Torque, k is spring constant, l0For spring free length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair
To the secondary distance of rotation, LdFor car door ball-type higher pair to the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For
Switching mechanism drift, LBdyIt is poor for vehicle body ball-type higher pair and car door ball-type higher pair y-coordinate.
Electronic back door switching mechanism internal friction fθWith manual operation power FhCharacteristic equation be：
Wherein, FSFor acting force of the spring, fθFor internal friction, δ is switching mechanism and XZ planes position phase, LPLGFor opening/closing machine
The arm of force of structure, m are car door quality, and g is acceleration of gravity, LOGFor car door center of gravity to the secondary distance of rotation, θ is car door opening angle,
θGOFor car door center of gravity initial bit phase, FhFor manual operation power, LOhFor manual operation force arm, k is spring constant, l0For spring certainly
By length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair to the secondary distance of rotation, LdFor car door ball-type higher pair
To the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For switching mechanism drift, LBdyFor vehicle body ball-type
Higher pair is poor with car door ball-type higher pair y-coordinate.
The maximum of manual operation power setting is set according to the requirement of client, has no clear and definite lower limit.If but manual operation
If power is too small, tailgate can cannot in stop.The maximum of general manual operation power setting is set as 100N.
The present invention, so as to adjustment mechanism internal friction then is led to by adjusting electronic back door switching mechanism internal clearance s
Cross experimental verification and test data processes to verify and optimize electronic back door switching mechanism internal clearance s, it is electronic so as to realize
Back door open/close machine perform electric operating when, motor assembly service efficiency η≤η 0 (motor safety efficiency)；Electronic back door
, when manual operation is performed, manual operation power Fh is rationally (manual operation power Fh≤100N) for switching mechanism), both the above state
Meet then electronic back door switching mechanism internal clearance s adjustment to complete.Electronic back door switching mechanism internal clearance s be outer tube with
Sliding friction gap between inner core.
The determination in the sliding friction gap between outer tube and inner core comprises the steps：
1) motorcar electric back door switching mechanism is arranged on test automotive back door so as to which automotive back door can
The standard-sized sheet of car door and fully closed function are realized by electronic back door switching mechanism, the opening and closing of electric operating back door, in electronic back
During door open/close machine performs electric operating, test collection motor operating parameter calculates motor during experimental test
Assembly service efficiency；
2) whether motor assembly service efficiency is judged less than or equal to motor safety efficiency, if motor assembly service efficiency is little
In or be equal to motor safety efficiency, then continue step 3)；If motor assembly service efficiency is more than motor safety efficiency, vapour is adjusted
Friction gap s that the inner core of car electronic back door switching mechanism is slidably matched with outer tube, returns and continues step 1)；
3) back door open/close machine internal friction f is obtained by formula 1θWith the characteristic equation of car door opening angle θ, incite somebody to action
This feature equation is substituted in formula 2, obtains the relation of manual operation power Fh when manual operation is performed and car door opening angle θ
Formula, and the equation curve of Fh and θ；
Formula 1 is：
Wherein, FMScrew rod axial force, F are acted on for motor assemblySFor acting force of the spring, fθFor internal friction, δ is opening and closing
Mechanism and XZ planes position phase, LPLGFor the arm of force of switching mechanism, m is car door quality, and g is acceleration of gravity, LOGArrive for car door center of gravity
Rotate secondary distance, θ is car door opening angle, θGOFor car door center of gravity initial bit phase, JGFor car door rotary inertia, η is motor assembly
Service efficiency, C be switching mechanism gearing factor, i be motor assembly gear ratio, u be motor assembly terminal voltage, U0It is total for motor
Into voltage, n is motor assembly velocity of rotation, n0For the idle speed under motor assembly voltage, TNIt is stifled under for motor assembly voltage
Torque, k is spring constant, l0For spring free length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair
To the secondary distance of rotation, LdFor car door ball-type higher pair to the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For
Switching mechanism drift, LBdyIt is poor for vehicle body ball-type higher pair and car door ball-type higher pair y-coordinate；
Formula 2 is：
Wherein, FSFor acting force of the spring, fθFor internal friction, δ is switching mechanism and XZ planes position phase, LPLGFor opening/closing machine
The arm of force of structure, m are car door quality, and g is acceleration of gravity, LOGFor car door center of gravity to the secondary distance of rotation, θ is car door opening angle,
θGOFor car door center of gravity initial bit phase, FhFor manual operation power, LOhFor manual operation force arm, k is spring constant, l0For spring certainly
By length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair to the secondary distance of rotation, LdFor car door ball-type higher pair
To the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For switching mechanism drift, LBdyFor vehicle body ball-type
Higher pair is poor with car door ball-type higher pair y-coordinate；
4) judge maximum manual operation power i.e. curve peak whether less than or equal to 100N；If maximum manual operation power is big
In 100N, then friction gap s that the inner core of motorcar electric back door switching mechanism and outer tube are slidably matched is adjusted, is returned and is continued step
It is rapid 1)；If maximum manual operation power is less than or equal to 100N, inner core and the outer tube of motorcar electric back door switching mechanism slide
The friction gap s adjustment of cooperation is completed, and obtains a satisfactory s value.Continue adjustment motorcar electric back door switching mechanism
Friction gap s that is slidably matched of inner core and outer tube, the above-mentioned all steps of repetition obtain multiple satisfactory s values.Multiple
An optimum is selected in satisfactory s values, as standard parameter value during production motorcar electric back door switching mechanism, is come
Realize the optimization of motorcar electric back door switching mechanism manual operation power.Optimum is located between the maxima and minima of s values.
Friction gap s that the inner core of all motorcar electric back door switching mechanisms after optimization is slidably matched with outer tube in s values most
Between big value and minima.The each adjustment amount of the present embodiment is set as 0.2mm., and certainly, this can be according to back
Door practical situation determines.The adjustment of friction gap s is realizing gap s by changing inner core or outer tube or slide bushing
Adjustment.
The motor assembly service efficiency is less than 70%.
Motor operating parameter includes motor terminal voltage, Hall pulse, makees streaming current, locked rotor current, rotating speed, motor operation
Parameter is collected by the motor data collecting device of specialty.This kind equipment can be commercially available on the market.
The invention has the beneficial effects as follows：Between outer tube and inner core of the present invention by adjustment electronic back door switching mechanism
Sliding friction gap, so as to adjustment mechanism internal friction, then processes to verify and optimize by experimental verification and test data
Sliding friction gap between the outer tube and inner core of electronic back door switching mechanism, so that realize that electronic back door switching mechanism exists
When performing electric operating, motor assembly service efficiency η≤η0(motor safety efficiency), considerably increases electronic back door opening/closing machine
The service life of structure motor, and then the service life of electronic back door switching mechanism is considerably increased, and without limitation on Automobile
The adjustment of the car load type face shaping of factory.
And electronic back door switching mechanism is when manual operation is performed, manual operation power FhReasonable (manual operation power Fh≤
100N)) so that customer is very light in manually opened and closed door.
Description of the drawings
Fig. 1 is that the standard-sized sheet of the motorcar electric back door switching mechanism of the present invention and fully closed installment state and surrounding enviroment are shown
It is intended to；
Fig. 2 is the structural scheme of mechanism of the motorcar electric back door switching mechanism of the present invention；
Fig. 3 is the complete section schematic diagram of the motorcar electric back door switching mechanism of the present invention；
P portion enlarged drawings of the Fig. 4 for Fig. 3.
Wherein, 1 is back door, and 2 is vehicle body gutter channel, and 3 is electronic back door switching mechanism, and 4 is anchor tip, and 5 are drive
Galvanic electricity machine, 6 is outer tube, and 7 is electric machine support, and 8 is screw rod, and 9 is spring, and 10 is slide bushing, and 11 is spigot nut, and 12 is interior
Cylinder, 13 is slip joint.
Specific embodiment
Referring to Fig. 1 to Fig. 4, a kind of electronic back door switching mechanism, including outer tube 6 and inner core 12, one end of the inner core
It is fixed for connecting the slip joint 13 of back door, the other end of inner core is slidably matched with outer tube in stretching into outer tube, the outer tube
Motor 5 is fixed with inside.The motor of this enforcement is fixed in outer tube by electric machine support 7.The motor and spiral shell
Bar 8 connects, and drives screw rod to rotate, and on the screw rod, screw thread is combined with spigot nut 11, drives inner core outside by spigot nut
Slide axially in cylinder.The spigot nut is fixedly connected with slip joint.Spring 9 is cased with the spigot nut.The spring
It is enclosed within screw rod, spigot nut, spring one end is located in outer tube, one end is located in inner core.The effect of spring is to make car door one
Determine in scope can in stop, and the provided auxiliary power during start is opened.The outer tube is fixed for connecting consolidating for vehicle body gutter channel
Determine joint 4.The spigot nut is provided with shoulder hole, and the screw rod is coordinated with the path section screw thread of shoulder hole, set on the screw rod
Some boss.The boss is located at screw end head, forms bolt head.The bolt head is slidably matched with the big footpath section of shoulder hole,
By inner core spacing in outer tube, the slip joint is fixedly connected with the shoulder hole bigger diameter end of spigot nut.The outer tube inner wall
It is fixed with the outer tube and inner core of the gap for electronic back door switching mechanism of slide bushing 10, slide bushing internal diameter and inner core external diameter
Between sliding friction gap.
Sliding friction gap between the outer tube and inner core is determined by motor assembly service efficiency and manual operation power, is somebody's turn to do
Sliding friction gap is little less than or equal to motor safety efficiency and manual operation power for meeting motor assembly service efficiency simultaneously
In or equal to the electronic back door switching mechanism of 100N both conditions internal friction corresponding to outer tube and inner core between
Sliding friction gap.
When electronic back door switching mechanism 3 is installed, its one end is coupled with the globe joint of 2 panel beating of vehicle body gutter channel, another
End is coupled with the globe joint of 1 panel beating of back door, by the operation (elongation and shortening) of electronic back door switching mechanism after installation
Realize promotion (the open the door and close the door) function of car door.When electric operating back door is opened and closed, motor is rotated, and drives screw rod to turn
It is dynamic, spigot nut is moved forward and backward axially along a screw by screw-driven, so that automotive back door opening/closing machine is elongated or shortened
And then being turned on and off for automotive back door is promoted, during here elongation and shortening, spring extends and shortens delivery spring power.
This law adjustment electronic back door switching mechanism outer tube and inner core between sliding friction gap come optimize it is electronic after
Tailgate switching mechanism internal friction fθ, make back door motor assembly service efficiency when automatically turning on optimum, during manual operation
Rationally, the sliding friction gap between the outer tube and inner core of electronic back door switching mechanism is to be opened and closed with electronic back door to operating physical force
What in-house frictional force was relevant be slidably matched gap.Internal clearance s is less, internal friction fθBigger, internal clearance s gets over
Greatly, internal friction fθIt is less.
The determination in the sliding friction gap between outer tube and inner core comprises the steps：
1) motorcar electric back door switching mechanism is arranged on test automotive back door so as to which automotive back door can
The standard-sized sheet of car door and fully closed function are realized by electronic back door switching mechanism, and in elongation and shortening, running is without bright
Aobvious clamping stagnation, running resistance are stable.Electric operating back door is opened and closed, and performs electrically operated mistake in electronic back door switching mechanism
Cheng Zhong, test collection motor operating parameter, obtains motor assembly service efficiency during experimental test by computed in software, obtains final product
To motor assembly service efficiency η and the equation curve with car door opening angle θ.η=real time motor power/motor rated power.
Motor operating parameter includes motor terminal voltage, Hall pulse, real-time running current, rotating speed etc..For installing motorcar electric
The test device of back door open/close machine can adopt car load, it would however also be possible to employ automobile aft section.
The present invention is directed to electronic back door switching mechanism during back door opening and closing for quality m, rigidity rotation
Inertia JGBack door compound movement be analyzed, it is ensured that back door motor assembly service efficiency when automatically turning on is optimum, handss
During dynamic operation, operating physical force rationally meets jointly.Can determine that the quality of back door, center of gravity, around hinge are rotated according to back door design
Rotary inertia and reference point coordinate distance and hinge centres.3 internal drive ratio of electronic back door switching mechanism and transmission
Under coefficient, and the rated voltage of motor 5, rated voltage stall moment of torsion and different situations motor assembly service efficiency according to
Specification (start time, the Steady speed, safety etc.) synthetic setting of client determines.
2) judge maximum motor assembly service efficiency i.e. step 1) in the corresponding η of peak of equation curve whether be less than
Or it is equal to motor safety efficiency.It is general to judge motor assembly service efficiency whether less than 70%.If motor assembly service efficiency is little
In or be equal to motor safety efficiency, then continue step 3)；If motor assembly service efficiency is more than motor safety efficiency, vapour is adjusted
Friction gap s that the inner core of car electronic back door switching mechanism is slidably matched with outer tube, returns and continues step 1).The present embodiment is every
Secondary adjustment amount is set as 0.2mm., and certainly, this can be determined according to back door practical situation.The adjustment of friction gap s can be with
The adjustment of gap s is realized by changing inner core or outer tube or slide bushing.The adjustment of friction gap s is typically by changing
Inner core or slide bushing are adjusted to more excellent scheme realizing gap s's.
3) back door open/close machine internal friction f is obtained by formula 1θWith the characteristic equation of car door opening angle θ, with
And fθWith the equation curve of θ.This feature equation is substituted in formula 2, manual operation power Fh when manual operation is performed is obtained
With the relational expression of car door opening angle θ, the equation curve of manual operation power Fh and car door opening angle θ is obtained.It is maximum to grasp manually
It is generally not to occur in standard-sized sheet or full close position as power, but in the vicinity of the position, concrete data is needed according to car door
Weight is analyzed with position of centre of gravity.
Formula 1 is：
Wherein, FMScrew rod axial force, F are acted on for motor assemblySFor acting force of the spring, fθFor internal friction, δ is opening and closing
Mechanism and XZ planes position phase, LPLGFor the arm of force of switching mechanism, m is car door quality, and g is acceleration of gravity, LOGArrive for car door center of gravity
Rotate secondary distance, θ is car door opening angle, θGOFor car door center of gravity initial bit phase, JGFor car door rotary inertia, η is motor assembly
Service efficiency, C be switching mechanism gearing factor, i be motor assembly gear ratio, u be motor assembly terminal voltage, U0It is total for motor
Into voltage, n is motor assembly velocity of rotation, n0For the idle speed under motor assembly voltage, TNIt is stifled under for motor assembly voltage
Torque, k is spring constant, l0For spring free length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair
To the secondary distance of rotation, LdFor car door ball-type higher pair to the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For
Switching mechanism drift, LBdyIt is poor for vehicle body ball-type higher pair and car door ball-type higher pair y-coordinate；
Formula 2 is：
Wherein, FSFor acting force of the spring, fθFor internal friction, δ is switching mechanism and XZ planes position phase, LPLGFor opening/closing machine
The arm of force of structure, m are car door quality, and g is acceleration of gravity, LOGFor car door center of gravity to the secondary distance of rotation, θ is car door opening angle,
θGOFor car door center of gravity initial bit phase, FhFor manual operation power, LOhFor manual operation force arm, k is spring constant, l0For spring certainly
By length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair to the secondary distance of rotation, LdFor car door ball-type higher pair
To the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For switching mechanism drift, LBdyFor vehicle body ball-type
Higher pair is poor with car door ball-type higher pair y-coordinate.m、g、LOG、θ、θGO、JG、LOhDesigned according to back door for manual operation force arm etc.
Obtain.
4) judge maximum manual operation power i.e. step 3) in equation curve the corresponding Fh of peak whether less than or wait
In 100N；If maximum manual operation power is more than 100N, the inner core and outer tube for adjusting motorcar electric back door switching mechanism slides
Friction gap s of cooperation, returns and continues step 1)；If maximum manual operation power is less than or equal to 100N, motorcar electric back
The friction gap s adjustment that the inner core of door open/close machine is slidably matched with outer tube is completed, and obtains a satisfactory s value.Continue
Friction gap s that the inner core of adjustment motorcar electric back door switching mechanism is slidably matched with outer tube, the above-mentioned all steps of repetition, obtains
To multiple satisfactory s values.An optimum is selected in multiple satisfactory s values, as producing the product later
Standard value.The each adjustment amount of the present embodiment is set as 0.2mm., and certainly, this can be determined according to back door practical situation.Rub
The adjustment for wiping gap s is realizing the adjustment of gap s by changing inner core or outer tube or slide bushing.
Between outer tube and inner core of the electronic back door switching mechanism of the present invention by adjustment electronic back door switching mechanism
Sliding friction gap, cause in-house change in friction force, then by experiment test and data processing optimizing motorcar electric
The internal structure of back door open/close machine, realizes electronic back door switching mechanism when electric operating is performed, and motor assembly is used
Efficiency≤η0(motor safety efficiency)；During electronic back door switching mechanism manual operation, reasonable (the manual operation power of manual operation power
≤ 100N)), the sliding friction gap for meeting then between the outer tube and inner core of electronic back door switching mechanism of both the above state
Adjustment is completed.
Claims (8)
1. a kind of electronic back door switching mechanism, it is characterised in that：Including outer tube and inner core, one end of the inner core is fixed for
The slip joint of connection back door, the other end of inner core are slidably matched with outer tube in stretching into outer tube, are fixed with drive in the outer tube
Galvanic electricity machine, the motor are connected with screw rod, drive screw rod to rotate, and on the screw rod, screw thread is combined with spigot nut, passes through
Spigot nut drives inner core in outer tube interior axle to slip, is cased with spring on the spigot nut, and the outer tube is fixed for connection
The anchor tip of vehicle body gutter channel, the sliding friction gap between the outer tube and inner core is by motor assembly service efficiency and manually
Operating physical force determines, the sliding friction gap for meeting motor assembly service efficiency less than or equal to motor safety efficiency simultaneously and
Manual operation power is interior less than or equal to the electronic back door switching mechanism of maximum both conditions of manual operation power setting
The sliding friction gap between outer tube and inner core corresponding to portion's frictional force.
2. electronic back door switching mechanism according to claim 1, it is characterised in that：The outer tube inner wall is fixed with slip
Bushing, the other end of inner core are stretched in outer tube and are slidably matched with the slide bushing of outer tube inner wall.
3. electronic back door switching mechanism according to claim 1, it is characterised in that：The spigot nut and slip joint
It is fixedly connected.
4. electronic back door switching mechanism according to claim 1, it is characterised in that：The spigot nut is provided with ladder
Hole, the screw rod are coordinated with the path section screw thread of shoulder hole, the boss that the screw rod is provided with, the big footpath of the boss and shoulder hole
Section is slidably matched, and by inner core spacing in outer tube, the slip joint is fixedly connected with the bigger diameter end of shoulder hole.
5. electronic back door switching mechanism according to claim 1, it is characterised in that：The spring housing is in screw rod, guiding
On nut, spring one end is located in outer tube, and one end is located in inner core.
6. electronic back door switching mechanism according to claim 1, it is characterised in that：Inside electronic back door switching mechanism
Frictional force fθCharacteristic equation with motor assembly service efficiency η is：
Wherein：
TNTest scope：(0→θmax)
FS=k | l-l0|
Wherein, FMScrew rod axial force, F are acted on for motor assemblySFor acting force of the spring, fθFor internal friction, δ is switching mechanism
With XZ planes position phase, LPLGFor the arm of force of switching mechanism, m is car door quality, and g is acceleration of gravity, LOGBe car door center of gravity to rotate
Secondary distance, θ be car door opening angle, θGOFor car door center of gravity initial bit phase, JGFor car door rotary inertia, η is that motor assembly is used
Efficiency, C be switching mechanism gearing factor, i be motor assembly gear ratio, u be motor assembly terminal voltage, U0For motor assembly electricity
Pressure, n be motor assembly velocity of rotation, n0For the idle speed under motor assembly voltage, TNTurn round for the stall under motor assembly voltage
Square, k is spring constant, l0For spring free length, l is size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair to turn
Dynamic pair distance, LdFor car door ball-type higher pair to the secondary distance of rotation, β0It is switching mechanism in space plane initial bit phase, L0For opening and closing
Institution freedom length, LBdyIt is poor for vehicle body ball-type higher pair and car door ball-type higher pair y-coordinate.
7. electronic back door switching mechanism according to claim 1, it is characterised in that：Inside electronic back door switching mechanism
Frictional force fθWith manual operation power FhCharacteristic equation be：
(FS+fθ)cosδLPLG+mgLOGcos(θ+θGO)+FhLoh=0
Wherein：
FS=k | l-l0|
Wherein, FSFor acting force of the spring, fθFor internal friction, δ is switching mechanism and XZ planes position phase, LPLGFor switching mechanism
The arm of force, m are car door quality, and g is acceleration of gravity, LOGIt is car door center of gravity to rotating secondary distance, θ is car door opening angle, θGOFor
Car door center of gravity initial bit phase, FhFor manual operation power, LOhFor manual operation force arm, k is spring constant, l0It is freely long for spring
Degree, l are size after switching mechanism spring-compressed, LBFor vehicle body ball-type higher pair to the secondary distance of rotation, LdFor car door ball-type higher pair to turn
Dynamic pair distance, β0It is switching mechanism in space plane initial bit phase, L0For switching mechanism drift, LBdyFor vehicle body ball-type higher pair
It is poor with car door ball-type higher pair y-coordinate.
8. electronic back door switching mechanism according to claim 1, it is characterised in that：The maximum of manual operation power setting
For 100N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510372403.3A CN104960401B (en) | 2015-06-30 | 2015-06-30 | Electric back-door opening and closing mechanism of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510372403.3A CN104960401B (en) | 2015-06-30 | 2015-06-30 | Electric back-door opening and closing mechanism of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104960401A CN104960401A (en) | 2015-10-07 |
| CN104960401B true CN104960401B (en) | 2017-03-22 |
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| CN201510372403.3A Active CN104960401B (en) | 2015-06-30 | 2015-06-30 | Electric back-door opening and closing mechanism of automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7648189B2 (en) * | 2005-10-03 | 2010-01-19 | Magna Closures Inc. | Powered actuating device for a closure panel of a vehicle |
| EP2199513B1 (en) * | 2008-12-19 | 2013-05-01 | Valeo Sicherheitssysteme GmbH | Adjusting device having a spindle drive |
| KR101020488B1 (en) * | 2009-06-12 | 2011-03-09 | 주식회사 광진엔지니어링 | Opening and closing device for back door of car |
| DE102012100220B4 (en) * | 2012-01-12 | 2015-01-15 | Stabilus Gmbh | driving means |
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