CN103358999B - A kind of spring coil Thickness Design of rear-viewing mirror in vehicle and experimental technique - Google Patents
A kind of spring coil Thickness Design of rear-viewing mirror in vehicle and experimental technique Download PDFInfo
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- CN103358999B CN103358999B CN201310323458.6A CN201310323458A CN103358999B CN 103358999 B CN103358999 B CN 103358999B CN 201310323458 A CN201310323458 A CN 201310323458A CN 103358999 B CN103358999 B CN 103358999B
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Abstract
The present invention relates to a kind of spring coil Thickness Design and experimental technique of rear-viewing mirror in vehicle, comprise ball cap, spring coil and spherical hinge holder, ball cap matches with the sphere of its bulb of spherical hinge holder; The inside ball face of ball cap comprises land portions and cambered surface part; The inner side sphere of described ball cap is provided with demarcation line; Ball cap is set to the structure of 4-12 lobe; Face on each lobe is a sphere; Ball cap is after the assembling of its bulb of spherical hinge holder, and each lobe of ball cap outwards opens, and is connected into same complete sphere, matches with bulb after making the aduncate cambered surface portion deforms on top with the land portions of bottom; The cylindrical root of ball cap is provided with fillet.It can solve the problem that high temperature moment of torsion and Alternating Test restrict mutually, can meet the requirement of high temperature moment of torsion, low temperature torque and 500 Alternating Test simultaneously, also have structure simple, operation controls highly sensitive, and lower-cost advantage, can actual operation requirements be met.
Description
Technical field
The invention belongs to vehicle mirrors technical field, relate to a kind of back mirror, particularly relate to a kind of spring coil Thickness Design and experimental technique of rear-viewing mirror in vehicle.
Background technology
At present, along with people's daily life level and the raising of work production efficiency, also more and more higher to the operating needs of vehicle, inside rear-view mirror is as the vitals of vehicle, more there is high temperature moment of torsion in it and Alternating Test restricts mutually, is difficult to the problem simultaneously meeting actual operation requirements.And for the inside rear-view mirror of vehicle, affect the mainly ball cap of its moment of torsion, spring coil and spherical hinge holder three parts, wherein, factor ball cap affecting moment of torsion mainly contains: (1) bulk material, (2) inner side sphere diameter, (3) inside ball surface roughness, the area of contact of ball cap and bulb after (4) assembling.Factor spherical hinge holder affecting moment of torsion mainly contains: (1) bulb diameter, (2) bulb circularity, and (3) dust surface gloss.Factor spring coil affecting moment of torsion mainly contains: (1) hardness own, (2) interior circular diameter variable quantity after mounting, (3) width.
Application number is " 03813336.9 ", publication number is " CN1659063A ", name is called the Chinese invention patent application of " utilizing the vehicular mirror actuator that single motor is actuated ", disclose a kind of car mirror with actuator, the actuator of this car mirror has the hinge mounting component along first axle and the second axis location, and this actuator is used for transposing pivotally car mirror comprising: motor, the first positioning member, the second positioning member, first drive attaching parts, second to drive attaching parts and power-transfer clutch; Although the car mirror with this actuator can reduce inertia torque at the direct of travel along mirror to a certain extent, because it has set up more complicated structure on the basis of car mirror, so there is the defect of complex structure, cost increase.
The patent No. is " ZL201020110624.6 ", Authorization Notice No. " CN201696554U ", name is called that the Chinese utility model patent of " gear drive in wing mirror reverse of automobile " discloses the gear drive in a kind of wing mirror reverse of automobile, and it comprises multiple planetary wheel, sun gear bar, the gear case upper cover all with internally toothed annulus and gear case lower cover; Although adopt the automobile rearview mirror of this device can meet the requirement of little moment of torsion to a certain extent, but because which increase the complexity of its structure of gear drive, so there is complex structure, operation control sensitvity constraint, and defect that cost is higher.
On the whole, existing rear-viewing mirror in vehicle, or the rear-viewing mirror in vehicle being provided with specific device is installed, specific in current vehicle practical application time, they are many is only reduce moment of torsion to a certain extent, or be only can reduce moment of torsion to a certain extent under specific circumstances, not the problem that mutually restricts of the solution high temperature moment of torsion of real meaning and Alternating Test, is not difficult to meet actual operation requirements equally simultaneously.
Summary of the invention
The object of the invention is to, a kind of spring coil Thickness Design and experimental technique of rear-viewing mirror in vehicle is provided, to solve the problem that high temperature moment of torsion and Alternating Test restrict mutually, thus make it meet actual operation requirements simultaneously.
For achieving the above object, a first aspect of the present invention provides a kind of rear-viewing mirror in vehicle, comprises ball cap, spring coil and spherical hinge holder, and described ball cap matches with the sphere of its bulb of spherical hinge holder.
This rear-viewing mirror in vehicle, its improvement project specifically can be specialized by means of multiple means in prior art, such as by removing overlap and the burr of ball cap, but carry out assembling test afterwards, but find that initial torque can diminish really, but after finishing 300 Alternating Test, record the variation range of moment of torsion compared with initial value more than 20%, lead to the failure; Or by adding lead powder layer between ball cap and bulb, thus increase lubrication, to reduce wearing and tearing decay between the two, although but substantially can meet 500 Alternating Test, be difficult to control powder addition, success ratio is lower, and carried out high temperature experiment, its moment of torsion is also at below 0.8Nm, and nonconformity, leads to the failure; Or by repairing hinge to ball cap inside, outstanding position being reamed, also attempting to increase spring coil tightening force simultaneously, by gluing aluminium skin at ball cap cylindrical, increase spring coil deflection, improve tightening force, but initial torque 1.8Nm in experiment, after 200 times, moment of torsion is down to 1.4Nm, and decay 0.4Nm, more than 20%, the effect of bonding aluminium skin is also not obvious, causes the failure of an experiment.
But preferably, the inside ball face of described ball cap comprises land portions and cambered surface part.
More preferably, the inner side sphere of described ball cap is provided with demarcation line, is land portions below described demarcation line, more than demarcation line is cambered surface part.
In above either a program preferably, described cambered surface part is aduncate cambered surface.
In above either a program preferably, the diameter phi of described land portions is 22mm.
It is further preferred that the radius R of described cambered surface part is 11mm.
In above either a program preferably, described ball cap is set to the structure of 4-12 lobe.
More preferably, the face on each lobe is a sphere.
More preferably, described ball cap is after the assembling of its bulb of spherical hinge holder, each lobe of described ball cap outwards opens, and is connected into same complete sphere, matches with bulb after making the aduncate cambered surface portion deforms on top with the land portions of bottom.
In above either a program preferably, described demarcation line is positioned at the root position place of lobe.
More preferably, described ball cap is set to the structure of 8 lobes.
In above either a program preferably, the cylindrical root of described ball cap is provided with fillet.
More preferably, the radius R of described fillet is 0.8mm.
More preferably, described demarcation line upwards offsets 0.8mm.
In above either a program preferably, the outside diameter φ before described ball cap assembling is 27.8mm.
More preferably, the outside diameter φ after described ball cap assembling is 29mm.
In above either a program preferably, each lobe is all set to the structure inwardly rotating 3 ° with its cylindrical mid point.
In above either a program preferably, the gloss range of described spherical hinge holder is 3.0-4.2.
More preferably, the gloss range of described spherical hinge holder is 3.2-3.8.
More preferably, the glossiness of described spherical hinge holder is 3.5.
In above either a program preferably, the thickness of described spring coil is 1.2-2.0mm.
More preferably, the thickness of described spring coil is 1.69mm.
More preferably, the thickness of described spring coil is 1.92mm.
More preferably, the thickness of described spring coil is 1.8mm.
For achieving the above object, second aspect of the present invention relates to a kind of spring coil Thickness Design Method of rear-viewing mirror in vehicle, comprises the following steps:
The first step, first, by measuring, determines spring coil thickness b and spring coil radius R;
Secondly, according to following formula,
Wherein, P is workload (spring coil elastic force), and W is section modulus, and σ is friction coefficient, and E is the material modulus of rigidity, and R is spring coil radius, and J is rectangle section moment of inertia, and π is circular constant coefficient; B is spring coil width, and h is spring coil thickness;
Known, workload (spring coil elastic force) P and spring coil width b is linear relationship; And workload (spring coil elastic force) P and spring coil thickness h are quadratic relationship;
That is, P
1/ h
1 2=P
2/ h
2 2(4)
That is, P
1h
2 2=P
2h
1 2(5)
Then set existing spring coil thickness as h then,
1, work on hand load (existing spring coil elastic force) is P
1if change design rear spring circle thickness is h
2, after change design, workload (change design rear spring circle elastic force) is P
2;
Second step, first, by measuring, determines the torque T of ball cap during not mounting spring circle
0; And by measuring under the same conditions, determine that installing existing spring coil thickness is h
1spring coil time ball cap torque T
1with torque arm length L,
Secondly, through type (6) calculates existing spring coil elastic force P
1;
That is, P
1=(T
1-T
0)/L (6)
Then be T by the torque setting of change design rear spring circle then,
2, and change design rear spring circle elastic force is set as F
2, the existing spring coil thickness h calculated in through type (7) and the first step
1with existing spring coil elastic force P
1, theory calls setting change design rear spring circle elastic force P
2for existing spring coil elastic force P
12 times, i.e. formula (8), thus calculate change design after spring coil thickness h
2,
That is, P
2=(T
2-T
0)/L (7)
P
2＝2P
1(8)。
For achieving the above object, another aspect of the invention relates to a kind of spring coil heights Experiment method of rear-viewing mirror in vehicle, comprises the following steps:
First, if original spring coil thickness is h
3, width is b
3, radius is R
3; If the thickness of change design rear spring circle is h
4, width is b
4, radius is R
4;
The then workload P of original spring coil
3:
P
3＝b
3h
3 2[σ]/6R
3(9)
The workload P of change design rear spring circle
4:
P
4＝b
4h
4 2[σ]/6R
4(10)
Then use back mirror torque T during original spring coil
3:
T
3＝P
3L+T
0；(11)
Use back mirror torque T during change design rear spring circle
4:
T
4＝P
4L+T
0；(12)
Secondly, adopt its ball cap of rear-viewing mirror in vehicle of the present invention, select bulb diameter identical, but moment of torsion time not mounting spring circle measured respectively by the different support 1 of surface gloss and support 2; Then existing spring coil is installed respectively, then the moment of torsion of the different support 1 of measured surface glossiness and support 2;
Then, but then obtain and use same ball headstock, support that same shape surface gloss is different, the thickness h of the change design rear spring circle required when moment of torsion is identical
4, that is:
If the friction coefficient of the support spherical surface of support 1 and ball cap is σ
1if the friction coefficient of support 2 support bulb and ball cap is σ
2, then support 1 and back mirror torque T when adopting existing spring coil is used
3:
T
3＝P
3σ
1(13)
When using support 2 and adopt the back mirror torque T of change design rear spring circle
4:
T
4＝P
4σ
2(14)
Then by G=F σ (15)
Wherein, G is torsion, and F is pressure;
Because ball cap and spring coil shape invariance, so use support 1 and use force value F during support 2 constant, that is:
G
1/σ
1＝G
2/σ
2(16)
Again due to the support arm of force:
L
1＝L
2(17)
Can be obtained by formula (13), (14), (15) and (16), back mirror moment of torsion:
T
3＝T
4(18)
Then b
3h
3 2[σ
1]/6R
2=b
3h
4 2[σ
2]/6R
2(19)
I.e. h
3 2[σ
1]=h
4 2[σ
2] (20)
The thickness h of change design rear spring circle is then drawn according to formula (19) experiment
4.
More preferably, the spring coil heights Experiment method of described rear-viewing mirror in vehicle, in the first step, if the width of change design rear spring circle and radius constant, i.e. width b
4=b
3, radius R
4=R
3.
Compared with prior art, the present invention has the following advantages:
The invention provides a kind of rear-viewing mirror in vehicle, by analyzing factor ball cap affecting moment of torsion, and carry out the innovative design of exploration simultaneously, to solve the problem that high temperature moment of torsion and Alternating Test restrict mutually, and the requirement of high temperature moment of torsion, low temperature torque and 500 Alternating Test can be met, in addition simultaneously, also there is structure simple, operation controls highly sensitive, and lower-cost advantage, can meet actual operation requirements.
Present invention also offers a kind of method of designing of spring coil thickness of rear-viewing mirror in vehicle, it is by the research and innovation of exploration, draw a kind of can fast, effectively and design the method for the spring coil thickness coordinating above-mentioned its ball cap of rear-viewing mirror in vehicle accurately, thus play the advantage of above-mentioned rear-viewing mirror in vehicle more efficiently, better meet the requirement of high temperature moment of torsion, low temperature torque and 500 Alternating Test simultaneously.
Present invention also offers a kind of experimental technique of spring coil thickness of rear-viewing mirror in vehicle, it is by a large amount of research experiments and exploration, draw a kind of can convenient, fast and accurate method of the spring coil thickness of above-mentioned its ball cap of rear-viewing mirror in vehicle of designed cooperation being carried out to experimental verification, thus more ensure accuracy and the validity of above-mentioned designed spring coil thickness, simultaneously also for the stable operation of above-mentioned rear-viewing mirror in vehicle provides better guarantee with effective work.
On the whole, the invention provides a kind of spring coil Thickness Design and experimental technique of rear-viewing mirror in vehicle, it is first by carrying out innovative design to its ball cap of rear-viewing mirror in vehicle, it is made to comprise land portions and arch section, and by carrying out distinguish design to ball cap, making the face on each lobe be a sphere, ensureing that strutting first sphere rear becomes from connecting tangent with second sphere, thus self-assembling formation complete sphere; Coordinate simultaneously and the thickness of spring coil is designed and tested, play the advantage of above-mentioned rear-viewing mirror in vehicle more efficiently, and more ensure accuracy and the validity of above-mentioned designed spring coil thickness, simultaneously also for the stable operation of above-mentioned rear-viewing mirror in vehicle provides better guarantee with effective work; It can solve the problem that high temperature moment of torsion and Alternating Test restrict mutually, and can meet the requirement of high temperature moment of torsion, low temperature torque and 500 Alternating Test simultaneously, in addition, also there is structure simple, operation controls highly sensitive, and lower-cost advantage, can meet actual operation requirements.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the invention will be further described:
Fig. 1 is the schematic appearance of the preferred embodiment according to rear-viewing mirror in vehicle of the present invention;
Fig. 2 is the structural representation of the preferred embodiment according to rear-viewing mirror in vehicle of the present invention;
Fig. 3 is the ball cap section of structure of the embodiment 6 according to rear-viewing mirror in vehicle of the present invention;
Fig. 4 is the schematic appearance of a preferred embodiment of ball cap according to rear-viewing mirror in vehicle of the present invention;
Fig. 5 is the birds-eye view embodiment illustrated in fig. 4 of the ball cap according to rear-viewing mirror in vehicle of the present invention;
Fig. 6 is the upward view embodiment illustrated in fig. 4 of the ball cap according to rear-viewing mirror in vehicle of the present invention.
In figure, 21 is ball cap, and 22 is spring coil, and 23 is spherical hinge holder, and 24 is land portions, and 25 is cambered surface part, and 26 is demarcation line, and 27 is lobe, and 28 is fillet.
Detailed description of the invention
In order to understand the present invention better, below in conjunction with specific embodiment, the present invention is explained in detail.But, obviously can carry out different modification and remodeling to the present invention and not exceed the wider spirit and scope of the present invention of appended claims.Therefore, following examples have exemplary and hard-core implication.
Embodiment 1:
As shown in Figure 1, Figure 2, shown in Fig. 4 to Fig. 6, a kind of rear-viewing mirror in vehicle, comprises ball cap 21, spring coil 22 and spherical hinge holder 23, and described ball cap 21 matches with the sphere of its bulb of spherical hinge holder 23.
Embodiment 2:
A kind of rear-viewing mirror in vehicle, with embodiment 1, difference is, the inside ball face of described ball cap 21 comprises land portions 24 and cambered surface part 25.
Embodiment 3:
A kind of rear-viewing mirror in vehicle, with embodiment 2, difference is, the inner side sphere of described ball cap 21 is provided with demarcation line 26, and described demarcation line less than 26 is land portions 24, and demarcation line more than 26 is cambered surface part 25.
Embodiment 4:
A kind of rear-viewing mirror in vehicle, with embodiment 2, difference is, described cambered surface part 25 is aduncate cambered surface.
Embodiment 5:
A kind of rear-viewing mirror in vehicle, with embodiment 3, difference is, the diameter phi of described land portions 24 is 22mm, and the radius R of described cambered surface part 25 is 11mm.
Embodiment 6:
As shown in Figure 3, a kind of rear-viewing mirror in vehicle, with embodiment 5, difference is, described ball cap 21 is set to the structure of 8 lobes 27; Face on each lobe 27 is a sphere; Described demarcation line 26 is positioned at the root position place of lobe 27; Described ball cap 21 is after the assembling of its bulb of spherical hinge holder 23, and each lobe 27 of described ball cap 21 outwards opens, and is connected into same complete sphere, matches with bulb after the aduncate cambered surface part 25 on top is out of shape with the land portions 24 of bottom; The cylindrical root of described ball cap 21 is provided with fillet 28; The radius R of described fillet 28 is 0.8mm; Described demarcation line 26 upwards offsets 0.8mm; Outside diameter φ before described ball cap 21 assembles is 27.8mm; Outside diameter φ after described ball cap 21 assembles is 29mm; Each lobe 27 is all set to the structure inwardly rotating 3 ° with its cylindrical mid point; The glossiness of described spherical hinge holder 23 is 3.5; The thickness of described spring coil 22 is 1.8mm.
Embodiment 7:
A kind of rear-viewing mirror in vehicle, with embodiment 6, difference is, described ball cap 21 is set to the structure of 4 lobes 27; The glossiness of described spherical hinge holder 23 is 3.2; The thickness of described spring coil 22 is 1.2mm.
Embodiment 8:
A kind of rear-viewing mirror in vehicle, with embodiment 6, difference is, described ball cap 21 is set to the structure of 12 lobes 27; The glossiness of described spherical hinge holder 23 is 3.8; The thickness of described spring coil 22 is 2.0mm.
Embodiment 9:
A kind of rear-viewing mirror in vehicle, with embodiment 6, difference is, described ball cap 21 is set to the structure of 6 lobes 27; The glossiness of described spherical hinge holder 23 is 3.0; The thickness of described spring coil 22 is 1.4mm.
Embodiment 10:
A kind of rear-viewing mirror in vehicle, with embodiment 6, difference is, described ball cap 21 is set to the structure of 8 lobes 27; The glossiness of described spherical hinge holder 23 is 4.2; The thickness of described spring coil 22 is 1.8mm.
Embodiment 11:
A kind of rear-viewing mirror in vehicle, with embodiment 6, difference is, described ball cap 21 is set to the structure of 5 lobes 27; The glossiness of described spherical hinge holder 23 is 3.6; The thickness of described spring coil 22 is 1.6mm.
Embodiment 12:
The spring coil Thickness Design Method of rear-viewing mirror in vehicle as above, comprises the following steps:
The first step, first, by measuring, determines spring coil thickness b and spring coil radius R;
Secondly, according to following formula,
Wherein, P is workload (spring coil elastic force), and W is section modulus, and σ is friction coefficient, and E is the material modulus of rigidity, and R is spring coil radius, and J is rectangle section moment of inertia, and π is circular constant coefficient; B is spring coil width, and h is spring coil thickness;
Known, workload (spring coil elastic force) P and spring coil width b is linear relationship; And workload (spring coil elastic force) P and spring coil thickness h are quadratic relationship;
That is, P
1/ h
1 2=P
2/ h
2 2(4)
That is, P
1h
2 2=P
2h
1 2(5)
Then set existing spring coil thickness as h then,
1, work on hand load (existing spring coil elastic force) is P
1if change design rear spring circle thickness is h
2, after change design, workload (change design rear spring circle elastic force) is P
2;
Second step, first, by measuring, determines the torque T of ball cap during not mounting spring circle
0; And by measuring under the same conditions, determine that installing existing spring coil thickness is h
1spring coil time ball cap torque T
1with torque arm length L,
Secondly, through type (6) calculates existing spring coil elastic force P
1;
That is, P
1=(T
1-T
0)/L (6)
Then be T by the torque setting of change design rear spring circle then,
2, and change design rear spring circle elastic force is set as F
2, the existing spring coil thickness h calculated in through type (7) and the first step
1with existing spring coil elastic force P
1, theory calls setting change design rear spring circle elastic force P
2for existing spring coil elastic force P
12 times, i.e. formula (8), thus calculate change design after spring coil thickness h
2,
That is, P
2=(T
2-T
0)/L (7)
P
2＝2P
1(8)。
As: measure the thickness b (i.e. arm of force L) of existing spring coil is 1.2mm; Measure not mounting spring circle time ball cap torque T
0for 0.5Nm; Measure the torque T after existing spring coil is installed under the same terms
1for 1.2-1.3Nm, then by the known existing spring coil elastic force P of formula (6)
1be 0.7 ~ 0.8Nm; Now need moment of torsion to be adjusted to about 2.0Nm, then the elastic force P of change design rear spring circle
22.0-0.5=1.5Nm need be adjusted to, i.e. P
2=2P
1, shown in (8); Then through type (5) can change the thickness h of design rear spring circle
2=1.6968.
Embodiment 13:
The spring coil heights Experiment method of rear-viewing mirror in vehicle as above, comprises the following steps:
First, if original spring coil thickness is h
3, width is b
3, radius is R
3; If the thickness of change design rear spring circle is h
4, width is b
4, radius is R
4;
The then workload P of original spring coil
3:
P
3＝b
3h
3 2[σ]/6R
3(9)
The workload P of change design rear spring circle
4:
P
4＝b
4h
4 2[σ]/6R
4(10)
Then use back mirror torque T during original spring coil
3:
T
3＝P
3L+T
0；(11)
Use back mirror torque T during change design rear spring circle
4:
T
4＝P
4L+T
0；(12)
Secondly, adopt its ball cap 21 of rear-viewing mirror in vehicle of the present invention, select bulb diameter identical, but moment of torsion time not mounting spring circle measured respectively by the different support 1 of surface gloss and support 2; Then existing spring coil is installed respectively, then the moment of torsion of the different support 1 of measured surface glossiness and support 2;
Then, but then obtain and use same ball headstock 21, support that same shape surface gloss is different, the thickness h of the change design rear spring circle required when moment of torsion is identical
4, that is:
If the friction coefficient of the support spherical surface of support 1 and ball cap 21 is σ
1if the friction coefficient of support 2 support bulb and ball cap 21 is σ
2, then support 1 and back mirror torque T when adopting existing spring coil is used
3:
T
3＝P
3σ
1(13)
When using support 2 and adopt the back mirror torque T of change design rear spring circle
4:
T
4＝P
4σ
2(14)
Then by G=F σ (15)
Wherein, G is torsion, and F is pressure;
Because ball cap and spring coil shape invariance, so use support 1 and use force value F during support 2 constant, that is: G
1/ σ
1=G
2/ σ
2(16)
Again due to the support arm of force: L
1=L
2(17)
Can be obtained by formula (13), (14), (15) and (16), back mirror moment of torsion:
T
3＝T
4(18)
Then b
3h
3 2[σ
1]/6R
2=b
3h
4 2[σ
2]/6R
2(19)
I.e. h
3 2[σ
1]=h
4 2[σ
2] (20)
The thickness h of change design rear spring circle is then drawn according to formula (19) experiment
4.
As: original spring coil thickness is 2.6mm, and width is 4mm, and radius is 12.5mm; If the thickness of change design rear spring circle is 1.2mm, then width is 10, and radius is 10.8;
Then P can be obtained by formula (9)
3=0.361 [σ], can obtain P by formula (10)
4=0.222 [σ];
Then P
3/ P
4=0.361 [σ]/0.222 [σ]=1.6224,
And the elastic force P of change design rear spring circle
4for 0.7-0.8Nm, then P can be obtained
3for 1.13568-1.29792Nm, then the moment of torsion obtaining existing spring coil according to formula (11) theory calculate is T
3=(1.13568+1.29792)+0.5=1.63568-1.79792;
Measure the moment of torsion of existing spring coil when being arranged on middle part is 1.5-1.6Nm, moment of torsion when being arranged on ball cap end face distance 2mm place is 1.9-2.0Nm, moment of torsion when being arranged on ball cap top end is 2.3-2.4Nm, then known, the moment of torsion of existing spring coil can change along with the change of installation site, the closer to the top of ball cap, moment of torsion is larger;
Then by P
3=(1.9-2.0)-0.5=1.4-1.5Nm, P
4=0.7-0.8Nm,
P can be obtained
3/ P
4=1.4/0.8-1.5/0.7=1.75-2.143;
Then above-mentioned ball cap is adopted, but moment of torsion when selecting the different support 1 of the identical glossiness of bulb diameter and support 2 to measure not mounting spring circle respectively; And then install existing spring coil respectively, then the moment of torsion of the different support 1 of measured surface glossiness and support 2; The support 1 then recorded not mounting spring circle time left side moment of torsion be 0.52Nm, right side moment of torsion is 0.54Nm, then moment of torsion aviation value is 0.53Nm, then torsion is 5.3N; Left side moment of torsion when existing spring coil installed by the support 1 recorded is 1.27Nm, and right side moment of torsion is 1.33Nm, then moment of torsion aviation value is 1.3Nm, then torsion is 13N; Record support 2 not mounting spring circle time left side moment of torsion be 0.32Nm, right side moment of torsion is 0.34Nm, then moment of torsion aviation value is 0.33Nm, then torsion is 3.3N; Left side moment of torsion when existing spring coil installed by the support 2 recorded is 0.91Nm, and right side moment of torsion is 0.95Nm, then moment of torsion aviation value is 0.93Nm, then torsion is 9.3N;
If support 1 is σ with the friction coefficient of ball cap
1,
If support 2 is σ with the friction coefficient of ball cap
2,
Due to ball cap and spring coil shape invariance, so constant by formula (15) known force value F, and because support changes, then friction coefficient σ changes, then,
The torsion G of spring coil during use support 1
1for 13-5.3=7.7N,
The torsion G of spring coil during use support 2
2for 9.3-3.3=6N,
Then σ can be obtained by formula (16)
2=6 σ
1/ 7.7;
Then setting when using support 2 adopts the thickness of change design rear spring circle as h
4, now make the moment of torsion of support 1 and support 2 equal, then by formula (18), (19) and (20), can h be obtained
2=1.9222081.
Meanwhile, use ball cap 21 described above, spring coil that thickness is 1.2mm, and glossiness is that after the spherical hinge holder assembling of 3.5, test, the data obtained is as follows:
Above data fit requirement of experiment, it is qualified to test.
Claims (26)
1. the spring coil Thickness Design Method of a rear-viewing mirror in vehicle, wherein, rear-viewing mirror in vehicle comprises ball cap (21), spring coil (22) and spherical hinge holder (23), and described ball cap (21) matches with the sphere of spherical hinge holder (23) its bulb; The method comprises the following steps:
The first step, first, by measuring, determines spring coil thickness b and spring coil radius R;
secondly, according to following formula, (1)
（2）
（3）
Wherein, P is spring coil elastic force, and W is section modulus, and σ is friction coefficient, and E is the material modulus of rigidity, and R is spring coil radius, and J is rectangle section moment of inertia, and π is circular constant coefficient; B is spring coil width, and h is spring coil thickness;
Known, spring coil elastic force P and spring coil width b is linear relationship; And spring coil elastic force P and spring coil thickness h are quadratic relationship;
That is, P
1/ h
1 2=P
2/ h
2 2(4)
That is, P
1h
2 2=P
2h
1 2(5)
Then set existing spring coil thickness as h then,
1, existing spring coil elastic force is P
1if change design rear spring circle thickness is h
2, change design rear spring circle elastic force is P
2;
Second step, first, by measuring, the torque T of ball cap (21) when determining not mounting spring circle
0; And by measuring under the same conditions, determine that installing existing spring coil thickness is h
1spring coil time ball cap torque T
1with torque arm length L;
Secondly, through type (6) calculates existing spring coil elastic force P
1;
That is, P
1=(T
1-T
0)/L(6)
Then be T by the torque setting of change design rear spring circle then,
2, and change design rear spring circle elastic force is set as F
2, the existing spring coil thickness h calculated in through type (7) and the first step
1with existing spring coil elastic force P
1, theory calls setting change design rear spring circle elastic force P
2for existing spring coil elastic force P
12 times, i.e. formula (8), thus calculate change design after spring coil thickness h
2,
That is, P
2=(T
2-T
0)/L(7)
P
2=2P
1（8）。
2. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 1, is characterized in that: the inside ball face of described ball cap (21) comprises land portions (24) and cambered surface part (25).
3. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 2, it is characterized in that: the inner side sphere of described ball cap (21) is provided with demarcation line (26), described demarcation line (26) is land portions (24) below, is cambered surface part (25) more than demarcation line (26).
4. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 3, is characterized in that: described cambered surface part (25) is aduncate cambered surface.
5. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 4, is characterized in that: the diameter phi of described land portions (24) is 22mm.
6. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 5, is characterized in that: the radius R of described cambered surface part (25) is 11mm.
7. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 6, is characterized in that: described ball cap (21) is set to the structure of 4-12 lobe (27).
8. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 7, is characterized in that: described ball cap (21) is set to the structure of 8 lobes (27).
9. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 7, is characterized in that: the face on each lobe (27) is a sphere.
10. the spring coil Thickness Design Method of rear-viewing mirror in vehicle as claimed in claim 7, is characterized in that: described demarcation line (26) are positioned at the root position place of lobe (27).
The spring coil Thickness Design Method of 11. rear-viewing mirror in vehicles as claimed in claim 9, it is characterized in that: described ball cap (21) is after the assembling of spherical hinge holder (23) its bulb, each lobe (27) of described ball cap (21) outwards opens, be connected into same complete sphere with the land portions (24) of bottom after making aduncate cambered surface part (25) distortion on top, match with bulb.
The spring coil Thickness Design Method of 12. rear-viewing mirror in vehicles as claimed in claim 11, is characterized in that: the cylindrical root of described ball cap (21) is provided with fillet (28).
The spring coil Thickness Design Method of 13. rear-viewing mirror in vehicles as claimed in claim 12, is characterized in that: the radius R of described fillet (28) is 0.8mm.
The spring coil Thickness Design Method of 14. rear-viewing mirror in vehicles as claimed in claim 13, is characterized in that: described demarcation line (26) upwards offset 0.8mm.
The spring coil Thickness Design Method of 15. rear-viewing mirror in vehicles as claimed in claim 14, is characterized in that: the outside diameter φ before described ball cap (21) assembling is 27.8mm.
The spring coil Thickness Design Method of 16. rear-viewing mirror in vehicles as claimed in claim 15, is characterized in that: the outside diameter φ after described ball cap (21) assembling is 29mm.
The spring coil Thickness Design Method of 17. rear-viewing mirror in vehicles as claimed in claim 7, is characterized in that: each lobe (27) is all set to the structure inwardly rotating 3 ° with its cylindrical mid point.
The spring coil Thickness Design Method of 18. rear-viewing mirror in vehicles as claimed in claim 17, is characterized in that: the gloss range of described spherical hinge holder (23) is 3.0-4.2.
The spring coil Thickness Design Method of 19. rear-viewing mirror in vehicles as claimed in claim 18, is characterized in that: the gloss range of described spherical hinge holder (23) is 3.2-3.8.
The spring coil Thickness Design Method of 20. rear-viewing mirror in vehicles as claimed in claim 18, is characterized in that: the glossiness of described spherical hinge holder (23) is 3.5.
The spring coil Thickness Design Method of 21. rear-viewing mirror in vehicles as claimed in claim 20, is characterized in that: the thickness of described spring coil (22) is 1.2-2.0mm.
The spring coil Thickness Design Method of 22. rear-viewing mirror in vehicles as claimed in claim 21, is characterized in that: the thickness of described spring coil (22) is 1.69mm.
The spring coil Thickness Design Method of 23. rear-viewing mirror in vehicles as claimed in claim 21, is characterized in that: the thickness of described spring coil (22) is 1.92mm.
The spring coil Thickness Design Method of 24. rear-viewing mirror in vehicles as claimed in claim 21, is characterized in that: the thickness of described spring coil (22) is 1.8mm.
The spring coil heights Experiment method of 25. 1 kinds of rear-viewing mirror in vehicles, comprises the following steps:
First, if original spring coil thickness is h
3, width is b
3, radius is R
3; If the thickness of change design rear spring circle is h
4, then width is b
4, radius is R
4;
The then spring coil elastic force P of original spring coil
3:
P
3=b
3h
3 2[σ]/6R
3（9）
The spring coil elastic force P of change design rear spring circle
4:
P
4=b
4h
4 2[σ]/6R
4（10）
Then use back mirror torque T during original spring coil
3:
T
3=P
3L+T
0；(11)
Use back mirror torque T during change design rear spring circle
4:
T
4=P
4L+T
0；（12）
Secondly, its ball cap of rear-viewing mirror in vehicle (21) selects bulb diameter identical, but moment of torsion time not mounting spring circle measured respectively by the different support 1 of surface gloss and support 2; Then existing spring coil is installed respectively, then the moment of torsion of the different support 1 of measured surface glossiness and support 2;
Then, then obtain use same ball headstock (21) but, same shape surface gloss
Different supports, the thickness h of the change design rear spring circle required when moment of torsion is identical
4, that is:
If the friction coefficient of the support spherical surface of support 1 and ball cap (21) is σ
1if the friction coefficient of support 2 support bulb and ball cap (21) is σ
2, then support 1 and back mirror torque T when adopting existing spring coil is used
3:
T
3=P
3σ
1（13）
When using support 2 and adopt the back mirror torque T of change design rear spring circle
4:
T
4=P
4σ
2（14）
Then by G=F σ (15)
Wherein, G is torsion, and F is pressure;
Because ball cap and spring coil shape invariance, so use support 1 and use force value F during support 2 constant, that is:
G
1/σ
1=G
2/σ
2（16）
Again due to the support arm of force:
L
1=L
2（17）
Can be obtained by formula (13), (14), (15) and (16), back mirror moment of torsion:
T
3=T
4（18）
Then b
3h
3 2[σ
1]/6R
2=b
3h
4 2[σ
2]/6R
2(19)
I.e. h
3 2[σ
1]=h
4 2[σ
2] (20)
The thickness h of change design rear spring circle is then drawn according to formula (19) experiment
4.
The spring coil heights Experiment method of 26. rear-viewing mirror in vehicles as claimed in claim 25, is characterized in that: establish the width of change design rear spring circle and radius constant, i.e. width b
4=b
3, radius R
4=R
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310323458.6A CN103358999B (en) | 2013-07-30 | 2013-07-30 | A kind of spring coil Thickness Design of rear-viewing mirror in vehicle and experimental technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310323458.6A CN103358999B (en) | 2013-07-30 | 2013-07-30 | A kind of spring coil Thickness Design of rear-viewing mirror in vehicle and experimental technique |
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| Publication Number | Publication Date |
|---|---|
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| CN103358999B true CN103358999B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310323458.6A Active CN103358999B (en) | 2013-07-30 | 2013-07-30 | A kind of spring coil Thickness Design of rear-viewing mirror in vehicle and experimental technique |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2012333B1 (en) | 2014-02-28 | 2015-10-19 | MCI (Mirror Controls International) Netherlands B V | Mirror adjustment mechanism, in particular for a wing mirror for a motor vehicle. |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201325387Y (en) * | 2008-12-12 | 2009-10-14 | 戴尧华 | Sucking disc universal car bracket |
| CN203032544U (en) * | 2012-12-29 | 2013-07-03 | 北京兴科迪科技有限公司 | Single-ball spherical hinge support |
| CN203472682U (en) * | 2013-07-30 | 2014-03-12 | 北京兴科迪科技有限公司 | Vehicle inside rear-view mirror |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8210695B2 (en) * | 2009-04-30 | 2012-07-03 | Gentex Corporation | Channeled mirror mount |
-
2013
- 2013-07-30 CN CN201310323458.6A patent/CN103358999B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201325387Y (en) * | 2008-12-12 | 2009-10-14 | 戴尧华 | Sucking disc universal car bracket |
| CN203032544U (en) * | 2012-12-29 | 2013-07-03 | 北京兴科迪科技有限公司 | Single-ball spherical hinge support |
| CN203472682U (en) * | 2013-07-30 | 2014-03-12 | 北京兴科迪科技有限公司 | Vehicle inside rear-view mirror |
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|---|---|
| CN103358999A (en) | 2013-10-23 |
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Denomination of invention: Spring ring thickness design and experimental method for vehicle inner rear-view mirror Effective date of registration: 20180531 Granted publication date: 20151209 Pledgee: Beijing technology intellectual property financing Company limited by guarantee Pledgor: Beijing Sincode Science & Technology Co., Ltd. Registration number: 2018990000425 |
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Effective date of registration: 20201217 Address after: 225500 south of Fuyuan Road, Luo Tang street, Jiangyan District, Taizhou, Jiangsu, China Patentee after: XINGKEDI TECHNOLOGY (TAIZHOU) Co.,Ltd. Address before: 100091 Beijing city Haidian District Chapeng Road No. 2 Patentee before: BEIJING SINCODE SCIENCE & TECHNOLOGY Co.,Ltd. |
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