CN102904376A - Transmission buffer type wiper motor as well as setting and installation method for transmission buffer parts of wiper motor - Google Patents
Transmission buffer type wiper motor as well as setting and installation method for transmission buffer parts of wiper motor Download PDFInfo
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- CN102904376A CN102904376A CN2012103843113A CN201210384311A CN102904376A CN 102904376 A CN102904376 A CN 102904376A CN 2012103843113 A CN2012103843113 A CN 2012103843113A CN 201210384311 A CN201210384311 A CN 201210384311A CN 102904376 A CN102904376 A CN 102904376A
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- armature shaft
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- rolling bearing
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Abstract
The invention discloses a transmission buffer type wiper motor which comprises a motor body component, a reduction box component and a circuit board component, wherein a split washer, a sleeve, a rolling bearing and a fixed check ring are arranged on an armature shaft of the motor body component and in a reduction box body of the reduction box component in sequence, and the rolling bearing is locked and fixed by a bearing fixed ring. Rubber buffer adjusting rings are arranged on the armature shaft, between the sleeve and the rolling bearing, and between the fixed check ring and the rolling bearing. The setting and installation method of the transmission buffer parts comprises the steps that the right end of the armature shaft is installed with an upper commutator, an armature winding, an armature core and an assembly fixed check ring, and then, the right-hand rubber buffer adjusting rings are sleeved in the armature shaft, the armature shaft is inserted into the inner bore of the rolling bearing fixed in the reduction box body, and the left-hand rubber buffer adjusting rings and the sleeve are successively placed in, and finally, the split washer is carded into a groove of the armature shaft. An armature shaft worm that is helical gear drive pairs can be reduced prevented from shaking and being impacted by the transmission buffer type wiper motor, so that the vibration and noise of the motor are reduced, and the performance and the life of the motor are improved.
Description
Technical field
The present invention relates to the installation method that arranges of a kind of motor and transmission bolster thereof.
Background technology
Vehicle windowpane electric water scraper (abbreviation wiper) is to be driven, can be removed the materials such as rainwater, frost and snow and dust on the automobile window glass outer surface by wiper by wiper motor.Wherein, wiper motor with deceleration device drives by connecting rod by the crank on its output shaft--the connecting rod mechanism movement that rocking bar forms, and drive the left and right floating rule be fixed on two output shafts and swing up and down, make the rubber Wiper blade that is installed on the left and right floating rule make corresponding left and right wiper and move.This transmission with the wiper motor of deceleration device is the armature shaft worm screw--the helical gear engagement system, when wiper is done the reciprocating motion of one-period, worm screw can alternately be subject to the axial force of left and right two directions, there is the gap between the secondary engagement of because armature shaft worm screw--Helical gear Transmission, and there is the gap between the worm screw armature shaft assembling and positioning part, therefore when wiper motor is worked, can produce than big bang and impact, increase vibration and the noise of wiper motor.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, and vibrations that are subject to when a kind of work is provided and impact the installation method that arranges of the lower transmission buffer-type wiper motor of noise all less, that produce and transmission bolster thereof.
Purpose of the present invention is achieved through the following technical solutions: a kind of transmission buffer-type wiper motor, comprise motor body assembly, reduction box assembly and circuit board module, wherein the reduction box assembly is made of deceleration box, helical gear, the motor body assembly is made of commutator, armature winding, armature core, magnetic shoe, casing, armature shaft, split washer, spacer, rolling bearing, fixing back-up ring are being housed on the armature shaft of described motor body assembly and in the deceleration box of reduction box assembly successively, and this rolling bearing blocks by the bearing fixed card ring fixing.
On the described armature shaft and between spacer and the rolling bearing and fixedly between back-up ring and the rolling bearing rubber buffer adjusting ring is being housed all; Described split washer, spacer, rolling bearing, fixedly back-up ring and rubber buffer adjusting ring consist of the transmission buffer unit of this wiper motor.
The assembling magnitude of interference of described rubber buffer adjusting ring is following three groups of data sums:
First group of group data is: square root sum square of the tolerance value of Related Dimension Chain, Related Dimension Chain comprise the C section size of armature shaft, fixedly width dimensions, the fixedly groove size, the width dimensions of rolling bearing, the size of spacer, the width dimensions of split washer, the groove size of split washer place armature shaft of back-up ring place armature shaft of back-up ring; Second group of group data is: the armature shaft worm screw--maximum engagement backlash during the secondary engagement of Helical gear Transmission; The 3rd group of group data are: the pretightning force coefficient multiply by armature shaft worm screw/helical gear normal module.
The installation method that arranges according to the transmission bolster of described transmission buffer-type wiper motor is: the right-hand member of described armature shaft has been installed commutator, armature winding, armature core and has been mounted with back-up ring, then the rubber buffer adjusting ring with the right side is inserted in armature shaft, this armature shaft is inserted in the rolling bearing endoporus that is fixed in the deceleration box, successively put into again rubber buffer adjusting ring and the spacer in left side, split washer is snapped in the groove of armature shaft at last.
After adopting the present invention, by split washer, rolling bearing and the fixing cushioning effect of the assembling between the back-up ring and two rubber buffer adjusting rings, reduced the armature shaft worm screw--the gap that may exist between the gap that exists between the secondary engagement of Helical gear Transmission and the armature shaft assembling and positioning part, make wiper motor when work, armature shaft worm screw--Helical gear Transmission shakes and impacts by secondary the minimizing, significantly reduce vibration and the noise of motor, performance and the life-span of improving wiper motor.Highly versatile of the present invention, easy for installation, high efficiency, input cost is low, has significant technological progress.
Description of drawings
The present invention is described in further detail below in conjunction with accompanying drawing and execution mode.
Fig. 1 is the mounting structure schematic diagram of transmission buffer-type wiper motor of the present invention.
Fig. 2 is the assembly structure figure on the armature shaft of motor body assembly among Fig. 1.
Fig. 3 is the transmission buffer unit installation diagram among Fig. 1.
Fig. 4 is that the rubber buffer adjusting ring is at the deformation pattern when left-hand is stressed on the armature shaft.
Fig. 5 is that the rubber buffer adjusting ring is at the deformation pattern when dextrad is stressed on the armature shaft.
Fig. 6 is the by compression rectangular plots of power F and deflection δ of rubber buffer adjusting ring.
Embodiment
Referring to figs. 1 through Fig. 3, transmission buffer-type wiper motor of the present invention, comprise the motor body assembly, reduction box assembly and circuit board module 10, wherein the reduction box assembly is by deceleration box 8, helical gear 3 consists of, the motor body assembly is by commutator (being commutator) 12, armature winding 15, armature core 16, magnetic shoe 14, casing 13, (supporting adjustment screw 1 is equipped with respectively at the two ends of this armature shaft 2 to the formations such as armature shaft 2 (its end be worm screw shape and be meshed with helical gear 3), spherical bearing 17), on the armature shaft 2 of described motor body assembly, and split washer 4 is equipped with successively in (and casing 13 places of close motor body assembly) in the deceleration box 8 of reduction box assembly, spacer 5, rolling bearing 7, fixedly back-up ring 11, and this rolling bearing 7 blocks fixing (being that bearing fixed card ring 9 is between deceleration box 8 and the rolling bearing 7) by bearing fixed card ring 9.On the described armature shaft 2 and between spacer 5 and the rolling bearing 7 and fixedly between back-up ring 11 and the rolling bearing 7 rubber buffer adjusting ring 6 is being housed all; Described split washer 4, spacer 5, rolling bearing 7, fixedly back-up ring 11 and rubber buffer adjusting ring 6 (left and right side) consist of the transmission buffer unit (being the transmission bolster) of this wiper motor.
Wherein, the deceleration box 8 of the casing 13 of motor body assembly and reduction box assembly matches to merge and tightens together.Supporting adjustment screw 1, rolling bearing 7 and spherical bearing 17, as three supportings before, during and after the armature shaft 2,7 on rolling bearing as intermediate support is fixed between deceleration box 8 and the bearing fixed card ring 9, but can slide at armature shaft 2, fixedly be fixed on the armature shaft 2 before back-up ring 11 assemblings, rubber buffer adjusting ring 6 is generally selected O type rubber ring, when armature shaft 2 and on part after deceleration box 8 interior assemblings are finished, 4 of split washers are installed in the groove of armature shaft 2, thereby finish the axial location of armature shaft 2.Commutator 12, armature winding 15, armature core 16 all are fixedly mounted on the armature shaft 2.Worm engaging on helical gear 3 and the armature shaft 2, transmission partners.
As shown in Figure 2: the installation method that arranges according to the transmission bolster of described transmission buffer-type wiper motor is: the right-hand member of described armature shaft 2 has been installed commutator 12, armature winding 15, armature core 16 and has been mounted with back-up ring 11, then the rubber buffer adjusting ring 6 on right side (on the fixing back-up ring left side) is inserted in armature shaft 2, these armature shaft 2 insertions are fixed in rolling bearing 7 endoporus of 8 li of deceleration box, successively put into again rubber buffer adjusting ring 6 and the spacer 5 in left side, at last split washer 4 is snapped in the groove of armature shaft 2.The width of now setting rolling bearing 7 is A, and the width of spacer 5 is B, split washer and fixedly the distance between the back-up ring be C, the rubber buffer adjusting ring is O type rubber ring, its diameter is d, after the installation, the distance that spacer surpasses armature shaft groove limit is δ
T(see Fig. 1 or Fig. 2) when split washer snaps in the groove of armature shaft, the rubber buffer adjusting ring is compressed distortion, spacer 5 outsides and fixedly the distance between back-up ring 11 inboards will become C by C ', i.e. C '-C=δ
T
As shown in Figure 3: the axial location of armature shaft 2 is to rely on the split washer 4 on rolling bearing 7 left and right limits and fixing back-up ring 11, this two back-up ring all is stuck in the groove of armature shaft, 7 on rolling bearing is contained in the deceleration box 8 and is fixing by bearing fixed card ring 9, as the Y-axis of armature shaft to keeper.During the work of this wiper motor, the left and right sides axial force that armature shaft 2 stands, acts on respectively on the rolling bearing 7 through spacer 5 and fixing back-up ring 11 by split washer 4 in the groove that is stuck in armature shaft.Now utilize on the left and right limit of rolling bearing 7 respectively and spacer 5, fixedly rubber buffer adjusting ring 6 is installed all between the back-up ring 11, eliminate the axial location in the armature shaft assembling, and the assembling magnitude of interference that this rubber buffer adjusting ring sets is analyzed.
Now the axial width after the compressed distortion of rubber buffer adjusting ring on setting left side and right side is S.Press Fig. 3 explanation, spacer 5 outsides and fixedly the distance between back-up ring 11 inboards will become C by C ', that is: C '-C=δ
T, S=(2d-δ then
T)/2.
As shown in Figure 4: when machine operation armature shaft 2 when left-hand is stressed, the left-hand axial force is F1 during armature shaft work, the wiper motor armature shaft is because of the stressed displacement to the right of left-hand, because being fixed in the deceleration box, rolling bearing 7 can not move axially, armature shaft just drives split washer 4 and spacer 5 displacement to the right, the rubber buffer adjusting ring 6 in compression left side makes the width of this rubber buffer adjusting ring 6 change over S1 by the S compression.On the contrary, the wiper motor armature shaft is because of the stressed displacement to the right of left-hand, the width of the rubber buffer adjusting ring 6 on right side loosened by S change over S2, Figure 4 shows that the transmission buffer unit of armature shaft is because of the stressed deformation pattern of armature shaft 2 left-hands, wherein S1+S2=2S.
As shown in Figure 5: when machine operation armature shaft 2 when dextrad is stressed, the dextrad axial force is F2 during armature shaft work, the wiper motor armature shaft is stressed to left dislocation because of dextrad, because being fixed in the deceleration box, rolling bearing 7 can not move axially, armature shaft just drives fixedly back-up ring 11 to left dislocation, the rubber buffer adjusting ring 6 on compression right side makes the width of this rubber buffer adjusting ring change over S4 by the S compression.On the contrary, the wiper motor armature shaft is stressed to left dislocation because of dextrad, the width of rubber buffer adjusting ring 6 is loosened by S change over S3, Figure 5 shows that the transmission buffer unit of wiper motor armature shaft is because of the stressed deformation pattern of armature shaft 2 dextrad, wherein S3+S4=2S.
As shown in Figure 6: take δ (unit as the micron: μ m) as rubber buffer adjusting ring deflection and as abscissa, take F (unit is as newton: N) as rubber buffer adjusting ring compression stress and as ordinate, X
D1X
D2X
D3(diameter of section is the performance curve of d1, d2, d3:d1＜d2＜d3), and P is δ to be respectively test exemplar rubber buffer adjusting ring
TAnd F
MThe coordinate intersection point, the rubber buffer adjusting ring diameter of section by this point is d0, d0 and as the diameter of section of selecting rubber buffer adjusting ring the best, wherein δ
TTotal compression deflection when being two rubber buffer adjusting rings installations, δ
MBe armature shaft maximum axial force F
MThe time rubber buffer adjusting ring deflection, F
MMaximum axial force when working for armature shaft.As be inconvenient to select d0, then can near the P point, select known performance curve nearby, such as the X among Fig. 6
D2, then the known rubber buffer adjusting ring diameter of section of its correspondence is d2, and selects d2 to replace d0, also very near the diameter of section of the best, at that time, δ
T, δ
0Corresponding ordinate is F
NAnd F
0', F
NFor selecting Best Point (being d2 among the figure) during close curve, the corresponding δ of rubber buffer adjusting ring
MThe compression stress of deflection, F
0' for selecting Best Point (being d2 among the figure) during close curve, the corresponding δ of rubber buffer adjusting ring
0The compression stress of deflection, F
NAnd F
0 'Type is extremely near F
MAnd F
0
When selecting the identical rubber buffer adjusting ring of left and right sides (O type rubber ring) 6, it assembles the magnitude of interference: δ
T=C '-C, S=(2d-δ
T)/2 or δ
T=2d-2S.
For guaranteeing to eliminate the axial location in the armature shaft assembling, then set:
δ
T＞(∑Δi
2)
1/2+Δ
Y＝(Δ1
2+Δ2
2+Δ3
2+Δ4
2+Δ5
2+Δ6
2+Δ7
2)
1/2+Δ
Y，
For guaranteeing to eliminate outside the axial location in the armature shaft assembling, the rubber buffer adjusting ring also should keep certain pretightning force, then can be set as:
δ
T=(∑ Δ i
2)
1/2+ Δ
Y+ α M=(Δ 1
2+ Δ 2
2+ Δ 3
2+ Δ 4
2+ Δ 5
2+ Δ 6
2+ Δ 7
2)
1/2+ Δ
Y+ 0.2m, wherein:
The tolerance value of Δ i---Related Dimension Chain;
The tolerance value of the size C of Δ 1---armature shaft 2;
Δ 2---is the tolerance value of the width dimensions of back-up ring 11 fixedly;
Δ 3---is the tolerance value of the groove size of back-up ring 11 place's armature shafts 2 fixedly;
The tolerance value of the width dimensions A of Δ 4---rolling bearing 7;
The tolerance value of the size of Δ 5---spacer 5;
The tolerance value of the width dimensions of Δ 6---split washer 4;
The tolerance value of the groove size of Δ 7---split washer 4 place's armature shafts 2;
Δ
YMaximum engagement backlash during the secondary engagement of---armature shaft worm screw--Helical gear Transmission;
M---armature shaft worm screw/helical gear normal module;
α---pretightning force coefficient selects α=0.2 (when power of motor is 50 watt-hours) herein.
This formula is as follows with literal expression: for guaranteeing to eliminate outside the axial location in the armature shaft assembling, the rubber buffer adjusting ring also should keep (certain) pretightning force, the assembling magnitude of interference (δ of described rubber buffer adjusting ring 6
T) be set as following three groups of data sums:
First group of group data is: square root sum square of the tolerance value of Related Dimension Chain, Related Dimension Chain comprise the C section size (be split washer 4 to fixedly the distance between the back-up ring 11) of armature shaft 2, fixedly width dimensions, the fixedly groove size, the width dimensions A of rolling bearing 7, the size of spacer 5, the width dimensions of split washer 4, the groove size of split washer 4 place's armature shafts 2 of back-up ring 11 place's armature shafts 2 of back-up ring 11; Second group of group data is: the armature shaft worm screw--maximum engagement backlash during the secondary engagement of Helical gear Transmission; The 3rd group of group data are: the pretightning force coefficient multiply by armature shaft worm screw/helical gear normal module (when power of motor is 50 watt-hours, selecting the pretightning force coefficient herein is 0.2).
Power take model as ZD1531A is example as 50 watts wiper motor:
δ
T＝(∑Δi
2)
1/2+Δ
Y+αM＝(Δ1
2+Δ2
2+Δ3
2+Δ4
2+Δ5
2+Δ6
2+Δ7
2)
1/2+Δ
Y+0.2m＝(0.1
2+0.1
2+0.1
2+0.01
2+0.1
2+0.1
2+0.1
2)
1/2+0.25+0.2X1＝0.695(mm)。
According to Fig. 4 explanation, when machine operation armature shaft 2 when left-hand is stressed, its left-hand axial force is F1, the wiper motor armature shaft is because of the stressed displacement to the right of left-hand, setting left-hand axial force maximum is F
1M, and corresponding left side rubber buffer adjusting ring 6 deflections are δ
1MIn like manner, according to Fig. 5 explanation, when machine operation armature shaft 2 when dextrad is stressed, the dextrad axial force is F2 during its work, the wiper motor armature shaft is stressed to left dislocation because of dextrad, setting dextrad axial force maximum is F
2M, and corresponding right side rubber buffer adjusting ring 6 deflections are δ
2MAgain because of the wiper motor armature shaft because of the stressed displacement to the right of left-hand, the width of right side rubber buffer adjusting ring 6 is loosened by S changes over S2, the gap does not appear for guaranteeing the axial location in the armature shaft assembling, then can set again: S2=d; In like manner require: S3=d, then: δ
T=δ
1Mδ
T=δ
2MWork as δ
1M=δ
2MThe time, δ
T=δ
1M=δ
2M=δ
M
δ wherein
MWhen equating for armature shaft left and right sides maximum axial force, the deflection of rubber buffer adjusting ring during maximum axial force.
The rubber buffer adjusting ring is installed, as the transmission buffer unit parts in the armature shaft transmission, and is analyzed setting its best magnitude of interference and size.When wiper is done the reciprocating motion of one-period, the armature shaft of wiper motor (containing worm screw) can alternately be subject to a left side, the axial force of right two directions, exist between gap and the armature shaft assembling and positioning part between the secondary engagement of because armature shaft worm screw--Helical gear Transmission and may have the gap, when working, wiper motor can produce vibration and noise, the invention provides a kind of wiper motor transmission buffer unit and design and installation method thereof, when machine operation, making the armature shaft worm screw--Helical gear Transmission shakes and impacts by secondary the minimizing, significantly reduce vibration and the noise of wiper motor, improve motor performance and life-span.
The wiper motor armature shaft is because of the stressed displacement to the right of left-hand, the width of the rubber buffer adjusting ring 6 on right side loosened by S change over S2, the gap do not occur for guaranteeing the axial location in the armature shaft assembling, requires: S2 〉=d; In like manner require: S3 〉=d.
Because of S1+S2=2S, reach S3+S4=2S again, and S=(2d-δ
T)/2;
As S2=S3=d and when setting S1=S4, S1=S4=d-δ then
T
Show this moment, the rubber buffer adjusting ring is subjected to the elastic compression of maximum axial force and is out of shape, and storage power, becomes the buffer unit parts in the armature shaft worm-drive.
To determining it best total magnitude of interference δ is installed
TAnd the method for designing of rubber buffer adjusting ring diameter d: utilize rubber buffer adjusting ring (being O type rubber ring) is installed, eliminate the axial location in the armature shaft assembling, and as the buffer unit parts of the storage power in the armature shaft transmission, to determining its best magnitude of interference δ
0The size that reaches rubber buffer adjusting ring diameter d has been carried out above-mentioned analysis, and its method for designing is as follows.For guaranteeing to eliminate the axial location in the assembling of armature shaft worm screw, the existing setting:
δ
T=(Δ 1
2+ Δ 2
2+ Δ 3
2+ Δ 4
2+ Δ 5
2+ Δ 6
2+ Δ 7
2)
1/2+ Δ
Y+ 0.2m, and selected: δ
T=δ
1M=δ
2M=δ
M
δ wherein
1M, δ
2MMaximum axial force F for left and right two directions of armature shaft
MThe time deflection, work as δ
1M=δ
2MThe time, set δ
1M=δ
2M=δ
Mδ
MBe armature shaft maximum axial force F
MThe time rubber buffer adjusting ring deflection.Select rubber buffer adjusting ring optimal cross section diameter.
See Fig. 6, X
D1, X
D2, X
D3(performance curve of d1＜d2＜d3), P is δ to be respectively test exemplar rubber buffer adjusting ring diameter of section and to be d1, d2, d3
MAnd F
MThe coordinate intersection point, the rubber buffer adjusting ring diameter of section by this point is d0, d0 is then as the diameter of section of selecting rubber buffer adjusting ring the best, wherein δ
TFor about two rubber buffer adjusting rings total compression deflection when installing, δ
T=2 δ
0=δ
M, or δ
0=0.5 δ
T=0.5 δ
M
Wherein: δ
0Compress variation when installing for single rubber buffer adjusting ring;
δ
MBe armature shaft maximum axial force F
MThe time O type rubber ring deflection;
F
MMaximum axial force when working for armature shaft.
As be inconvenient to select d0, then can near the P point, select known performance curve nearby, such as the X among Fig. 6
D2, then the known O type rubber ring diameter of section of its correspondence is d2, and selects d2 to replace d0, also very near the diameter of section of the best, at that time, δ
T, δ
0Corresponding ordinate is F
NAnd F
0 ', F
NFor selecting Best Point (being d2 among Fig. 6) during close curve, the corresponding δ of O type rubber ring
MThe compression stress of deflection, F
0 'For selecting Best Point (being d2 among Fig. 6) during close curve, the corresponding δ of O type rubber ring
0The compression stress of deflection, F
NAnd F
0 'Type is extremely near F
MAnd F
0
The design selecting method of described rubber buffer adjusting ring 6 is:
1. adopting material is that the O shape circle of acrylonitrile-butadiene rubber is the rubber buffer adjusting ring, the C section consistent size of this O shape circle inside diameter D and armature shaft 2;
2. calculate rubber buffer adjusting ring assembling magnitude of interference δ
T:
δ
T＝(∑Δi
2)
1/2+Δ
Y+αM＝(Δ1
2+Δ2
2+Δ3
2+Δ4
2+Δ5
2+Δ6
2+Δ7
2)
1/2+Δ
Y+0.2m
Selected: armature shaft maximum axial force F
MThe time rubber buffer adjusting ring deflection δ
M
δ
M＝δ
1M＝δ
2M＝δ
T?。
Maximum axial force F when 3. calculating armature shaft work
M
4. with this O shape circle same inner diameter D, the O type circle with different diameter of section (d1, d2, d3 etc.) is made respectively δ (μ m)-F (N) performance curve (seeing Fig. 6);
5. choose δ at the δ (μ m) of the performance curve of O type circle-F (N) coordinate
M=δ
TAnd F
M, get intersection point P;
6. choose the performance curve nearest with the P point, its corresponding diameter of section (d2) is the diameter of section size that O type circle plan is selected;
7. verification: require: PP '/F
M≤ 5%.
Power take model as ZD1531A is example as 50 watts wiper motor:
1. adopting material is that the O type circle of acrylonitrile-butadiene rubber is the rubber buffer adjusting ring, the C section consistent size of this O type circle inside diameter D and armature shaft 2, D=8.
2. calculate rubber buffer adjusting ring assembling magnitude of interference δ
T
δ
T＝(∑Δi
2)
1/2+Δ
Y+αM＝(Δ1
2+Δ2
2+Δ3
2+Δ4
2+Δ5
2+Δ6
2+Δ7
2）
1/2+Δ
Y+0.2m＝(0.1
2+0.1
2+0.1
2+0.01
2+0.1
2+0.1
2+0.1
2)
1/2+0.25+0.2X1＝0.695(mm)。
Selected: armature shaft maximum axial force F
MThe time rubber buffer adjusting ring deflection δ
M
δ
M＝δ
1M＝δ
2M＝δ
T＝0.695(mm)。
Maximum axial force F when 3. calculating armature shaft work
M
Model is that the power of ZD1531A is 50 watts wiper motor, when the output services torque is 4.4Nm, as calculated, F
M=80N.
4. with this O shape circle same inner diameter D, make the δ (μ m) of the O type circle of relevant different diameter of section (d1, d2, d3 etc.)-F (N) performance curve, see Fig. 6.
5. choose δ at the δ (μ m) of the performance curve of O type circle-F (N) coordinate
M=δ
T=0.695 (mm) and F
M=80N gets intersection point P, sees Fig. 6.
6. choose the performance curve nearest with the P point, its corresponding diameter of section is d2, and d2=2 is the diameter of section size that O type circle plan is selected.
7. verification: PP '/F
M=4.5%≤5%.
Above-mentioned definite its installed best total magnitude of interference δ
TAnd the method for designing of rubber buffer adjusting ring diameter of section d, a kind of wiper motor transmission buffer unit and method for designing thereof are provided, through test, when wiper motor is worked, making the armature shaft worm screw--Helical gear Transmission shakes and impacts by secondary the minimizing, significantly reduce vibration and the noise of motor, improved motor performance and life-span.
In addition, when the maximum axial force of left and right two directions of armature shaft does not wait, can use above-mentioned method for designing, select different rubber buffer adjusting ring diameter of section d.
The invention provides a kind of transmission buffer unit and design and installation method thereof of wiper motor, when wiper motor is worked, making the armature shaft worm screw--the secondary minimizing of Helical gear Transmission shaken and impacts, and significantly reduces vibration and the noise of motor, improves motor performance and life-span.The present invention can be widely used in various permanent magnet DC motors supporting on the vehicle, such as wiper motor, seat motor, glass lifting motor, skylight motor etc.
Claims (5)
1. transmission buffer-type wiper motor, comprise the motor body assembly, reduction box assembly and circuit board module (10), wherein the reduction box assembly is by deceleration box (8), helical gear (3) consists of, the motor body assembly is by commutator (12), armature winding (15), armature core (16), magnetic shoe (14), casing (13), armature shaft (2) consists of, it is characterized in that: on the armature shaft (2) of described motor body assembly, and in the deceleration box (8) of reduction box assembly, split washer (4) is housed successively, spacer (5), rolling bearing (7), fixedly back-up ring (11), and this rolling bearing (7) blocks fixing by bearing fixed card ring (9).
2. transmission buffer-type wiper motor according to claim 1 is characterized in that: upper and between spacer (5) and the rolling bearing (7) and fixedly between back-up ring (11) and the rolling bearing (7) rubber buffer adjusting ring (6) is being housed all at described armature shaft (2); Described split washer (4), spacer (5), rolling bearing (7), fixedly back-up ring (11) and rubber buffer adjusting ring (6) consist of the transmission buffer unit of this wiper motor.
3. transmission buffer-type wiper motor according to claim 2, it is characterized in that: the assembling magnitude of interference of described rubber buffer adjusting ring (6) is following three groups of data sums:
First group of group data is: square root sum square of the tolerance value of Related Dimension Chain, Related Dimension Chain comprise the C section size of armature shaft, fixedly width dimensions, the fixedly groove size, the width dimensions of rolling bearing, the size of spacer, the width dimensions of split washer, the groove size of split washer place armature shaft of back-up ring place armature shaft of back-up ring; Second group of group data is: the armature shaft worm screw--maximum engagement backlash during the secondary engagement of Helical gear Transmission; The 3rd group of group data are: the pretightning force coefficient multiply by armature shaft worm screw/helical gear normal module.
4. the transmission bolster of transmission buffer-type wiper motor according to claim 1 arranges installation method, it is characterized in that: the right-hand member of described armature shaft (2) has been installed commutator (12), armature winding (15), armature core (16) and be mounted with back-up ring (11), then the rubber buffer adjusting ring (6) with the right side is inserted in armature shaft (2), this armature shaft (2) insertion is fixed in inner rolling bearing (7) endoporus of deceleration box (8), successively put into again rubber buffer adjusting ring (6) and the spacer (5) in left side, at last split washer (4) is snapped in the groove of armature shaft (2).
The transmission bolster of transmission buffer-type wiper motor according to claim 4 installation method is set, it is characterized in that: the design selecting method of described rubber buffer adjusting ring (6) is:
1. adopting material is that the O shape circle of acrylonitrile-butadiene rubber is the rubber buffer adjusting ring, the C section consistent size of this O shape circle internal diameter (D) and armature shaft;
2. calculate the rubber buffer adjusting ring assembling magnitude of interference (δ
T); And selected armature shaft maximum axial force F
MThe time rubber buffer adjusting ring deflection (δ
M);
Maximum axial force (F when 3. calculating armature shaft work
M);
4. with this O shape circle same inner diameter (D), the O type circle with different diameter of section (d1, d2, d3 etc.) is made respectively δ (μ m)-F (N) performance curve;
5. choose δ at the δ (μ m) of the performance curve of O type circle-F (N) coordinate
M=δ
TAnd F
M, get intersection point P;
6. choose the performance curve nearest with the P point, its corresponding diameter of section (d2) is the diameter of section size that O type circle plan is selected.
7. verification.
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| CN104369716A (en) * | 2014-11-19 | 2015-02-25 | 浙江胜华波电器股份有限公司 | Wiper motor free of lateral swing |
| CN105119414A (en) * | 2015-09-29 | 2015-12-02 | 珠海凯邦电机制造有限公司 | Rotating shaft axial limiting structure and motor |
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| CN104369716A (en) * | 2014-11-19 | 2015-02-25 | 浙江胜华波电器股份有限公司 | Wiper motor free of lateral swing |
| CN105119414A (en) * | 2015-09-29 | 2015-12-02 | 珠海凯邦电机制造有限公司 | Rotating shaft axial limiting structure and motor |
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| Publication number | Publication date |
|---|---|
| CN102904376B (en) | 2015-09-23 |
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