CN201923230U - Uniform stress turnover mechanism for driving cab - Google Patents
Uniform stress turnover mechanism for driving cab Download PDFInfo
- Publication number
- CN201923230U CN201923230U CN2010206597808U CN201020659780U CN201923230U CN 201923230 U CN201923230 U CN 201923230U CN 2010206597808 U CN2010206597808 U CN 2010206597808U CN 201020659780 U CN201020659780 U CN 201020659780U CN 201923230 U CN201923230 U CN 201923230U
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- Prior art keywords
- compartment
- operator
- central siphon
- torsion
- switching mechanism
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Abstract
The utility model provides a uniform stress turnover mechanism for a driving cab, which has a simple structure, is easy to implement and has the greatly-reduced stress compared with the traditional structure and solves the problems that left and right parts are difficult in design, have inconsistent service lives and the like because the stress of two support arms of the traditional turnover mechanism for the driving cab is non-uniform, the stress of the driving cab is non-uniform to cause the skewed deformation and skewed vibration and the left-right stress of the driving cab is non-uniform. The uniform stress turnover mechanism comprises a torsion bar, a shaft tube, two support seats and two support rams, wherein the torsion bar penetrates through the shaft tube; one end of the torsion bar is fixed on one support seat; the other end of the torsion bar is connected with one end of the shaft tube; the two support arms for supporting the driving cab are respectively fixed on the shaft tube; the shaft tube is rotatably arranged on the two support seats; a certain included angle is formed by the two support arms in the circumferential direction of the shaft tube; and when one support arm drives the shaft tube to rotate relative to the other support arm so as to reduce the included angle, the direction of the torsion generated by the shaft tube is opposite to the direction of the torsion of the driving cab, which is generated by the weight of the driving cab on the shaft tube.
Description
Technical field
The utility model relates to a kind of automobile cab switching mechanism, specifically, is a kind of operator's compartment list torsion bar switching mechanism.
Background technology
Modern lilliput car mostly adopts forward control cab.Convenient for maintaining, modern forward control cab mostly adopts the tilt cab structure.For easy to operate, light, laborsaving and make simple in structurely, generally, mostly adopt single torsion bar to come the weight of balance operator's compartment to a row and row operator's compartment partly.
The structure of existing single torsion bar switching mechanism front cross-section view is made up of torsion bar 1, central siphon 2, left support abutment 3, left supporting arm 4, right supporting arm 5, right support abutment 6, regulating arm 7, regulating arm fixed orifice 8 as shown in Figure 1.Wherein torsion bar 1 is connected with spline 9 with central siphon 2 left ends, and central siphon is fixed in the bearing hole of left support abutment 3 and right support abutment 6 again, can rotate, and can not move.Regulating arm 7 and the spline of torsion bar 1 right-hand member are connected and are fixed on the right side of right support abutment.Design has strip shape fixed orifice 8 on the regulating arm 7, can regulate the setting angle of torsion bar, thus the size that can regulate torsion bar torsion.Whole switching mechanism is fixed on the crossbeam by left and right sides bearing.
The forward sight right side view of switching mechanism is the local installing condition of switching mechanism and operator's compartment as shown in Figure 2.The left and right sides supporting arm of two longerons and switching mechanism becomes an integral body with bolts assemblies on the cab floor.
The macroscopic view of Fig. 2 as shown in Figure 3, the weight G of operator's compartment acts on center of gravity A point.Operator's compartment center of gravity A point, with the horizontal throw of switching mechanism centre of gration (axis of torsion bar) C be L, vertical distance H.The strained condition of the operator's compartment of horizontality, also shown in Figure 3.We are as seen from Figure 3:
Be in the operator's compartment of horizontality, its weight G will produce gravity and moment of torsion to two supporting arms of switching mechanism.Gravity is born by supporting base, and passes to crossbeam.The operator's compartment moment of torsion M that operator's compartment weight produces is born jointly by left and right sides supporting arm, and passes to central siphon.Central siphon passes to torsion bar by the spline of left end, makes torsion bar produce distortion and produces balancing torque, and pass to regulating arm by the spline of torsion bar right-hand member, and regulating arm is fixed on the supporting base and moment of torsion is passed to crossbeam again, is born and is supported by crossbeam.
For observe, problem analysis is convenient, we Fig. 1 front cross-section view ajust, the positive placement as shown in Figure 4, the moment of torsion M that operator's compartment weight produces two supporting arms of switching mechanism
A, M
BExpression.These two moments of torsion are acted on the central siphon of its welding by two supporting arms.Among the figure, A, B represent the weld part of left and right supporting arm and central siphon respectively, and O represents the spline connecting portion of central siphon and torsion bar, and a represents the distance that the O point is ordered to B; B represents the distance that the B point is ordered to A.
We analyze the moment of torsion distribution situation of central siphon: the torsion bar right-hand member of central siphon the inside is fixed on the right support abutment by supporting arm, and left end is connected with central siphon by spline.M is the moment of torsion that the torsion bar torsional deflection produces, and the spline by left end acts on the central siphon, by the left and right sides supporting arm on the central siphon, acts on the operator's compartment moment of torsion that balance operator's compartment weight produces again.Therefore M just equals the moment of torsion that operator's compartment weight produces.M
AAnd M
BDirection be through result calculated repeatedly.The strained condition that obtains central siphon thus as shown in Figure 4.Calculate the numerical value of each moment of torsion now.
Method of calculating is as follows: with the moment of torsion that calculates positive and negative both direction, the principle that the windup-degree that produce with respect to same attachment point equate is calculated (being called dAlembert principle on mechanics, just the principle of virtual displacement).As shown in Figure 4, the modulus of shearing of establishing central siphon is G, and moment of inertia is I
When being attachment point with A: moment of torsion M with respect to the torsional angle that the A point produces is: M (a+b)/GI
Moment of torsion M
BThe torsional angle that produces with respect to the A point is: M
BB/GI
Because switching mechanism is in state of equilibrium, thus two torsional angles of top both forward and reverse directions should equate, that is:
M (a+b)/GI=M
BB/GI; Cancel denominator: M (a+b)=M
BThe b conversion gets: M
B=M (a+b)/b
Referring to Fig. 4, the principle equal by the moment of torsion of positive and negative both direction suffered on the same bar can get again:
M
B=M
A+ M transposition calculate M
A=M
B-M
With following formula M
BThe value substitution calculate M
A=M (a+b)/b-M=Ma/b
M
B＝M+M
A＝M+Ma/b＝M(1+a/b)
The moment of torsion at Here it is two supporting-point A, B place.
The ratio of 2 moments of torsion in AB place: M
B/ M
A=(1+a/b)/(a/b)=1+b/a.
Construction parameter according to certain operator's compartment and switching mechanism:
A=211; B=480; The operator's compartment moment of torsion that M=2256 NM---operator's compartment weight produces
Calculate: M
A=Ma/b=2256*211/480=991.7
M
B＝M(1+a/b)＝2256＊(1+211/480)＝3247.7
As seen supporting arm discontinuity in the left and right sides differs: 3347.7/991.7=3.27 times
Calculate the distortion angle of central siphon below.
Certain operator's compartment central siphon material: 20A; Central siphon outer diameter D=Φ 40mm; Central siphon inner diameter d=Φ 32mm; G=76000Mpa; L is the central siphon length between 2 that calculate;
Central siphon stiffness K=π (D
4-d
4) G/32/L* π/180
＝π(40
4-32
4)*76000/32/L*π/180＝1.968*10
5/L?Nm/deg
Wherein stiffness coefficient K is multiplied by π/180, is to carry out angular unit to convert, by radian degree of becoming.
Calculate the distortion angle of central siphon now.Basic point is exactly the bench mark that calculates, i.e. Jia She attachment point in the following table.Calculate the corner numerical value of other point with respect to bench mark.Stiffness K
M, K
MA, K
MBRepresent moment of torsion M, M respectively
A, M
BThe plane at place is with respect to the rigidity of basic point; Corner is the corner with respect to basic point.Concrete data list is as follows:
By top result of calculation as can be seen: with respect to same basic point, the different twist angles that reverse a little are identical.
Be up to now above, all light-duty cab-over-engine vehicles, design, manufacturing and the mode of operation of single torsion bar upset operator's compartment.Too big (example of this patent differs and reaches 3.38 times because the operator's compartment longeron is subjected to the difference of supporting moment of torsion of two supporting arms of switching mechanism, bigger has reached six times more than), make the operator's compartment discontinuity, this will produce following serious design, manufacturing, use and waste of material or the like many-sided problems.
1, design is unreasonable.Both sides are stressed to differ so big, not from design point of view, this irrationality is solved, and be a class-one defect.
2, owing to design is unreasonable, both sides are stressed to differ too big, and it is crooked to cause operator's compartment to take place, and supporting central siphon and supporting arm before vehicle frame, operator's compartment left and right sides floor frame, the operator's compartment are required all to improve a lot, causes cost to increase substantially.
3, worse, operator's compartment left and right sides floor frame all is the parts that adopt same structure, size and material.Stressed on one side big, stress is big, and material is operated in the rim condition of stress.Another side stress is very little again, and material is among the great waste.
4, this crooked power is not again a stable power, but produces crooked vibration together along with the vibration of vehicle body, makes the occupant very uncomfortable again.
Such state, all operator'ies compartment and the designer of cab turning mechanism are fully aware of, and everybody addresses this problem trying every possible means.Can not solve all the time.
Summary of the invention
What the utility model solved is two hold-down arm unbalance stress of existing cab turning mechanism, operator's compartment unbalance stress, generation diagonal distortion and crooked vibration, operator's compartment left and right sides unbalance stress causes inconsistent or the like the problem of left and right sides parts design difficulty, life-span, provide a kind of simple in structure, implement easily, the equal stress switching mechanism of operator's compartment that the stress amplitude ratio conventional confguration descends significantly.
The equal stress switching mechanism of operator's compartment of the present utility model comprises torsion bar, central siphon, two bearings, two supporting arms; Torsion bar passes central siphon, and the one end is fixed on the bearing, and the other end is connected with an end of central siphon; Two supporting arms that are used to support operator's compartment all are fixed on central siphon; Central siphon rotates and is arranged on two bearings, and two supporting arms become certain included angle at the circumferencial direction of central siphon; When a supporting arm drive central siphon made that with respect to another supporting arm rotation angle reduces, the moment of torsion that central siphon produces was opposite to the operator's compartment torque direction that central siphon produces with the weight of operator's compartment.
The beneficial effects of the utility model: the utility model broken through traditional switching mechanism when design two supporting arms with crossbeam on the angle on plane be identical thinking, promptly two supporting arms are parallel, and the angle of two supporting arms on the circumferencial direction of central siphon is 0 ° thinking.The angle on plane is different on two supporting arms and the crossbeam and allow.Promptly two supporting arms become certain included angle at the circumferencial direction of central siphon.
When operator's compartment assembles, the rigidity that operator's compartment is powerful, force the angle on plane on two supporting arms and the crossbeam to become identical, thereby applied a pretorque just for left and right sides supporting arm, the direction of pretorque is opposite with the direction of (in traditional switching mechanism) torque peak that it produced when supporting arm was horizontal, and a torque peak balance part, makes supporting arm when normal operation, about stress on two supporting arms equal substantially, thereby a series of problems above having solved.
The equal stress switching mechanism of above-mentioned operator's compartment turns to described angle when being 0 ° when supporting arm drives central siphon with respect to another supporting arm, and the moment of torsion that central siphon produces equates with the operator's compartment torque of the weight of operator's compartment to the central siphon generation.
When following surface analysis was not installed in equal stress switching mechanism at operator's compartment, supporting arm should much (pretorque be much in other words) with respect to the angle of another supporting arm.
The moment of torsion that we add needs in advance is made as unknown number M
x, the pre-torsional angle of corresponding generation is α
x, this is the pre-torsional angle of maximum torque point B, just before the operator's compartment assembling, and the angle between two supporting arms.We can obtain thus:
M
x＝α
x*K′。State of nature when be unkitted operator's compartment for switching mechanism this moment, as shown in Figure 5.
Wherein K is the rigidity between two supporting arms: by Automobile Engineering Manual, 2001 editions p819 of a design piece of writing check in:
K′＝π(D
4-d
4)G/32/L*π/180
Certain operator's compartment central siphon material: 20A; Central siphon outer diameter D=Φ 40mm; Central siphon inner diameter d=Φ 32mm; G=76000Mpa; L is the central siphon length (i.e. distance b between two supporting arms) between 2 of A, the B;
K '=π (D then
4-d
4) G/32/L* π/180=π (40
4-32
4) * 76000/32/480* π/180=410Nm/deg
Wherein stiffness K ' be multiplied by π/180 is to carry out angular unit to convert, by radian degree of becoming.
In when assembling, operator's compartment is in the highest position of tiltedly putting, and two hold-down arms and the operator's compartment of switching mechanism are assembled into one.At this moment, operator's compartment barycenter and gravity vertical are by the axis of the central siphon of switching mechanism, two supporting arms do not bear the moment of torsion that operator's compartment weight produces, again because switching mechanism and operator's compartment are assembled into one, angle between two supporting arms shown in Figure 5 disappears, thereby makes two supporting arms only bear the moment of torsion that this adds in advance, and, one positive one is negative, and numerical value is half of pre-moment of torsion.Because not like this, supporting arm and operator's compartment just can not balances.So,
Be in the highest position of tiltedly putting at operator's compartment, during the axis of operator's compartment gravity vertical by the central siphon of switching mechanism:
A point moment of torsion is: M
A'=0.5M
XB point moment of torsion is: M
BThe 0.5M of '=-
X
When operator's compartment does not overturn, horizontal service position:
A point operation torque is: M
A"=M
A'+M
A=0.5M
X+ Ma/b;
B point operation torque is: M
B"=M
B'+M
B=-0.5M
X+ M (1+a/b)
The operation torque that promptly is 2 of A, B equals the moment of torsion that pretorque adds that previous calculations is come out respectively.Before the operation torque True Data of not knowing 2 of A, B, the operation torque that our mandatory order A, B is 2 equates.That is:
Order: M
A"=M
B", substitution following formula: 0.5M
X+ Ma/b=-0.5M
X+ M (1+a/b)
Transposition calculates: M
X=M (1+a/b)=Ma/b=M
Certain operator's compartment M=2256NM (the operator's compartment moment of torsion that operator's compartment weight produces), substitution gets:
M
X＝M＝2256Nm。
The numerical value of the pretorque when this moment of torsion that has just calculated 2 of A, B equates.When just two supporting arm moments of torsion of A, B are identical, the numerical value of pretorque.This pretorque just equals the moment of torsion that operator's compartment weight produces.
Therefore, pre-torsional angle α
x=M
x/ K '=M/K '.Be that pre-torsional angle equals the operator's compartment torsional angle of the weight of operator's compartment to the central siphon generation.
The data that the substitution previous calculations is come out:
M
X＝M＝2256Nm，K′＝410Nm/deg；
Get α
x=M
x/ K '=M/K '=2256/410=5.5 °.
The operation torque that supporting arm A, B are 2
M
A″＝M
B″＝0.5M
X+Ma/b＝0.5×2256+2256×211/480＝2119.7
Operation torque descends than the operation torque of traditional switching mechanism: (3247.7-2119.7)/and 3247.7=34.7%
Thus we as can be seen, the originally left and right sides supporting arm and the operator's compartment of discontinuity, it is stressed identical with the operator's compartment both sides to become left and right sides supporting arm now.This a series of problem with regard to being put forward above having solved has been pushed ahead a step to the design effort of switching mechanism.
The equal stress switching mechanism of above-mentioned operator's compartment, 2 °≤angle≤30 °, preferred angle=5 °-10 °.
The equal stress switching mechanism of above-mentioned operator's compartment, the described torsion bar other end is connected by spline with an end of central siphon.
The manufacture method of the equal stress switching mechanism of above-mentioned operator's compartment comprises two supporting arms that are used to support operator's compartment is fixed (as welding) step on central siphon that two supporting arms that are fixed on the circumferencial direction of central siphon become certain included angle; When a supporting arm drive central siphon made that with respect to another supporting arm rotation angle reduces, the moment of torsion that central siphon produces was opposite to the operator's compartment torque direction that central siphon produces with operator's compartment weight.
Can calculate the torsional angle that the operator's compartment moment of torsion produces the central siphon between two supporting arms, the supporting arm of close torsion bar and central siphon junction one end is rotated half operator's compartment torsional angle in the opposite direction along driver's cab turnover side and be fixed on the central siphon; Another supporting arm is rotated half operator's compartment torsional angle and is fixed on the central siphon along the driver's cab turnover direction.
Description of drawings
Fig. 1 is the three-dimensional cutaway view of operator's compartment list torsion bar switching mechanism.
Fig. 2 is the partial schematic diagram (right side view of Fig. 1) that operator's compartment list torsion bar switching mechanism links to each other with operator's compartment.
When Fig. 3 is the operator's compartment horizontality, the stressed scheme drawing of single torsion bar switching mechanism.
Fig. 4 is the front cross sectional view of existing operator's compartment list torsion bar switching mechanism.
Fig. 5 is the lateral plan that the equal stress switching mechanism of operator's compartment of the present utility model is unkitted operator's compartment.
The specific embodiment
The equal stress switching mechanism of operator's compartment referring to shown in Fig. 5 (and with reference to figure 1, can regard the right side view of Fig. 1 as) comprises compositions such as torsion bar 1, central siphon 2, left support abutment 3, left supporting arm 4, right supporting arm 5, right support abutment 6, regulating arm 7.Torsion bar 1 is connected with spline 9 with central siphon 2 left ends, central siphon be fixed on again left support abutment 3 and right support abutment 6 bearing holes in, can rotate, can not move.Regulating arm 7 is connected with the spline 10 of torsion bar 1 right-hand member and passes through regulating arm fixed orifice 8, by being bolted on the right support abutment.Strip shape fixed orifice 8 on the regulating arm 7 can be regulated the setting angle of torsion bar, thus the size that can regulate torsion bar torsion.The left supporting arm and the right supporting arm that are used to support operator's compartment all are welded on central siphon.Left side supporting arm becomes certain included angle α with right supporting arm at the circumferencial direction of central siphon
x, as α
x=5.5 °.
Turn to described angle when being 0 ° when left supporting arm drives central siphon with respect to right supporting arm, the moment of torsion that central siphon produces is with the weight of operator's compartment is equal to the operator's compartment torque that central siphon produces, direction is opposite.
The method of all stress cab turning mechanism designs, manufacturing is as follows:
1. by traditional method the switching mechanism of operator's compartment is designed.Carry out following work on this basis.
2. calculate the central siphon rigidity between the supporting arm of the left and right sides.
3. when calculating level attitude, the operator's compartment moment of torsion that operator's compartment weight produces with respect to centre of gration.
4. calculate the torsional angle that the operator's compartment moment of torsion produces between the supporting arm of the left and right sides, be called operator's compartment torsional angle or pre-torsional angle.
5. change the position of weld of traditional design supporting arm: the left supporting arm near the central siphon splined end is rotated the operator's compartment torsional angle half along the opposite direction of driver's cab turnover, the free-ended supporting arm of central siphon is rotated the operator's compartment torsional angle half along the driver's cab turnover direction.
6. by angle of calculating above and size design drawing, weld assembly.
7. on-the-spot entrucking, confirm that every work is errorless after, just can test and place in operation.
Traditional switching mechanism, when design two supporting arms with crossbeam on the angle on plane be identical (in other words, the left and right sides supporting arm of installation operator's compartment is identical with the setting angle on cab floor plane), thereby produce a series of problems.Therefore the major measure and the thinking of this patent are exactly, allow the angle on plane is different (left and right sides supporting arm of installation operator's compartment and the setting angle on cab floor plane are inequality) on two supporting arms and the crossbeam, as shown in Figure 5.When operator's compartment assembled, the rigidity that operator's compartment is powerful forced two supporting arms to become identical with the angle on cab floor plane.Described left and right sides supporting arm is after operator's compartment installs, and when operator's compartment was in the horizontal seated position of design-calculated, two supporting arms and operator's compartment connected the stressed substantially the same of parts such as longeron.Compare with traditional switching mechanism, stress decrease 30-50%.
The original operator's compartment of discontinuity, it is stressed identical to become left and right sides supporting arm now.This a series of problem with regard to being put forward above having solved has been pushed ahead a step to the design effort of switching mechanism.
This shows, this product structure is simple, implement easily, compare with conventional confguration, stressing conditions improves greatly, the stress amplitude ratio conventional confguration descend significantly and distribution of stress even, strained condition is reasonable, stable working at operator's compartment and switching mechanism, state of stress, all there has been very big improvement stock utilization or the like aspect, solved the problem of the switching mechanism left and right sides unbalance stress of long-term puzzlement engineers, and operator's compartment unbalance stress, generation diagonal distortion and crooked vibration influence occupant's traveling comfort and operator's compartment left and right sides unbalance stress causes left and right sides parts design difficulty, problem that life-span is inconsistent or the like.
Claims (6)
1. the equal stress switching mechanism of operator's compartment comprises torsion bar, central siphon, two bearings, two supporting arms; Torsion bar passes central siphon, and the one end is fixed on the bearing, and the other end is connected with an end of central siphon; Two supporting arms that are used to support operator's compartment all are fixed on central siphon; Central siphon rotates and is arranged on two bearings, and it is characterized in that: two supporting arms become certain included angle at the circumferencial direction of central siphon; When a supporting arm drive central siphon made that with respect to another supporting arm rotation angle reduces, the moment of torsion that central siphon produces was opposite to the operator's compartment torque direction that central siphon produces with the weight of operator's compartment.
2. the equal stress switching mechanism of operator's compartment as claimed in claim 1, it is characterized in that: turn to described angle when being 0 ° when supporting arm drives central siphon with respect to another supporting arm, the moment of torsion that central siphon produces equates with the operator's compartment torque of the weight of operator's compartment to the central siphon generation.
3. the equal stress switching mechanism of operator's compartment as claimed in claim 2 is characterized in that: 2 °≤angle≤30 °.
4. the equal stress switching mechanism of operator's compartment as claimed in claim 1 is characterized in that: 2 °≤angle≤30 °.
5. the equal stress switching mechanism of operator's compartment as claimed in claim 4 is characterized in that: angle=5.5 °.
6. the equal stress switching mechanism of operator's compartment as claimed in claim 1 is characterized in that: the described torsion bar other end is connected by spline with an end of central siphon.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206597808U CN201923230U (en) | 2010-12-15 | 2010-12-15 | Uniform stress turnover mechanism for driving cab |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206597808U CN201923230U (en) | 2010-12-15 | 2010-12-15 | Uniform stress turnover mechanism for driving cab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201923230U true CN201923230U (en) | 2011-08-10 |
Family
ID=44427096
Family Applications (1)
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|---|---|---|---|
| CN2010206597808U Expired - Lifetime CN201923230U (en) | 2010-12-15 | 2010-12-15 | Uniform stress turnover mechanism for driving cab |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050154A (en) * | 2010-12-15 | 2011-05-11 | 南京开瑞汽车技术有限公司 | Cab even-stress tilting mechanism and manufacturing method thereof |
| CN104554492A (en) * | 2013-10-17 | 2015-04-29 | 北汽福田汽车股份有限公司 | Dual-bar turnover mechanism and vehicle |
| CN107856748A (en) * | 2017-11-03 | 2018-03-30 | 江铃汽车股份有限公司 | Single torsion bar turnover mechanism and automobile |
-
2010
- 2010-12-15 CN CN2010206597808U patent/CN201923230U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050154A (en) * | 2010-12-15 | 2011-05-11 | 南京开瑞汽车技术有限公司 | Cab even-stress tilting mechanism and manufacturing method thereof |
| CN102050154B (en) * | 2010-12-15 | 2012-10-03 | 南京开瑞汽车技术有限公司 | Cab even-stress tilting mechanism and manufacturing method thereof |
| CN104554492A (en) * | 2013-10-17 | 2015-04-29 | 北汽福田汽车股份有限公司 | Dual-bar turnover mechanism and vehicle |
| CN104554492B (en) * | 2013-10-17 | 2018-06-19 | 北汽福田汽车股份有限公司 | Double torsion bar turnover mechanisms and vehicle |
| CN107856748A (en) * | 2017-11-03 | 2018-03-30 | 江铃汽车股份有限公司 | Single torsion bar turnover mechanism and automobile |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110810 Effective date of abandoning: 20121003 |