CN103868697A - Passenger car body-in-white bending and torsion stiffness test restraint device - Google Patents
Passenger car body-in-white bending and torsion stiffness test restraint device Download PDFInfo
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- CN103868697A CN103868697A CN201210526432.7A CN201210526432A CN103868697A CN 103868697 A CN103868697 A CN 103868697A CN 201210526432 A CN201210526432 A CN 201210526432A CN 103868697 A CN103868697 A CN 103868697A
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Abstract
The invention provides a passenger car body-in-white bending and torsion stiffness test restraint device which includes a workbench, a torsion crossbeam, a first column, a second column, a third column, and a fourth column. The torsion crossbeam is horizontally arranged on one side of the workbench via a support, and can rotate horizontally around the support. The lower end of the first column and the lower end of the second column are arranged on the two sides of the torsion crossbeam respectively. The lower end of the third column and the lower end of the fourth column are arranged on the other side of the workbench at an interval. The top end of each column is provided with a connecting member which limits three mobile degrees of freedom but does not limit three rotational degrees of freedom. The lower end of the third column or the lower end of the fourth column is fixed on the workbench, and among the connecting members between the lower ends of the remaining three columns and the workbench or the torsion crossbeam, one is a unidirectional rotary hinge, and the other two are connecting members which limit three mobile degrees of freedom but does not limit three rotational degrees of freedom. In such a manner, the six degrees of freedom of the car body space are restrained, the influence of a frame to the car body stiffness is eliminated, and the car body posture can be easily adjusted.
Description
Technical field
The present invention relates to vehicle detection technical field, be specifically related to a kind of car white vehicle vehicle body bending stiffness test restraint device.
Background technology
Body in white (Body in White) has referred to welding but the vehicle body before application not, does not comprise the movement parts such as car door, bonnet.Body in white adds just composition vehicle body truly of interior exterior trim (comprising instrument panel, steering hub column, seat, front and rear windshield, rearview mirror, beater or beat-up, water tank, headlight, carpet, interior trim backplate etc.) and car door, bonnet, luggage-boot lid and electronic apparatus system, in row, be called trimmed body, the vehicle body installing, adds on this basis chassis (comprising engine, wheel box, kinematic train, brake system, suspension system, exhaust system etc.) and has just formed car load.
Bending stiffness and torsional rigidity are one of important performances of body in white structure, and the test of body stiffness need to set up a set of science, reliable test method, and vehicle body restraint device has very important effect.Traditional body in white stiffness test platform adopted constraint fixed form substantially, made institute's measuring car body rigidity value be subject to stand impact, and in assembling process, can vehicle body be produced and preloaded, and the body distortion device restriction that suffers restraints in process of the test.
The key point of measuring body in white rigidity is the way of restraint and the displacement transducer precision of vehicle body.At present, domestic each Automobile Enterprises and relevant colleges and universities all carry out have body in white curved, turn round stiffness test, and the precision of displacement transducer is substantially all higher than 0.01mm, and restraint device is not quite similar, difference is just the restriction to vehicle body spatial degrees of freedom.Currently used mode was constraint formula, and the kinematic pair quantity that each vibration damper installation place of body in white rigidly fixes or introduces is very few, causes constraint.
Known technical scheme related to the present invention is as follows:
" car white vehicle body structure torsional rigidity test constraint and charger " (applying date: on November 8th, 2002, patent No. ZL02146783.8) of people's exploitations such as 1, Tsing-Hua University's model is outstanding, as shown in Figure 1; And " car white vehicle body structure bending stiffness test constraint and charger " (applying date: on November 8th, 2002, patent No. ZL02146781.1).
2. quick " car white vehicle body structure static angular rigidity testing system and test method thereof " (applying date: on April 18th, 2008, patent No. ZL200810093644.4) of waiting people's exploitation of the Chen Wen of Saic Chery Automobile Co., Ltd, as shown in Figure 2.
The degree of freedom of carrying out the free components of spatial movement is 6, determines that the position of a member in space coordinates needs 6 independently location parameters, and in other words, member can have 3 independently move and have 3 independently to rotate around three coordinate axis along three coordinate axis.When mutually all suffering restraints after member composition spatial kinematic pair, and still maintain certain relative motion after two member component movement pairs.Kinematic pair type used in space mechanism is more, conventionally classifies by retraining number in kinematic pair again.The kinematic pair that constraint number is 1 is called 1 grade of pair, and the kinematic pair that constraint number is 2 is called 2 grades of pairs, the like, the kinematic pair that constraint number is 5 is called 5 grades of pairs.The constraint number that degree of freedom=all movable part degree of freedom-all kinematic pairs are introduced of space mechanism, its formula is:
F=6n-5P5-4P4-3P3-2P2-P1
In formula: n is movable part number; P1, P2, P3, P4, P5 are respectively the number of 1-5 level kinematic pair.
In above-mentioned known body in white stiffness test restraint device technical scheme, ball pair, revolute pair that the torsional rigidity test of vehicular restraint device of the people such as Fan Zijie exploitation is introduced are maximum, but quantity is still limited and had a constraint; The constraint number that its body in white spatial degrees of freedom=all movable part degree of freedom-all kinematic pairs are introduced, that is:
F=6n-5P5-4P4-3P3-2P2-P1-k
=6×4-5×1-4×0-3×6-2×0-1×0-2
=-1
In formula: n is movable part number; P1, P2, P3, P4, P5 are respectively the number of 1-5 level kinematic pair; K is isolated degree of freedom.
Visible, in existing best-of-breed technology scheme, still had constraint.
Due to ball pair, the revolute pair limited amount introduced, there is constraint to body in white in prior art scheme, its shortcoming is as follows:
A) do not meet space mechanism's degree of freedom constraint requirements, introduced the constraint that exceedes vehicle body six-freedom degree, and then can preload its generation in the time that fixing vehicle body is installed; Each stage of Vehicle Body Development all needs to test rigidity value, retrains formula device owing to can produce not of uniform size preloading in clamping process and cross, and will certainly reduce the comparability of rigidity value that each stage surveys.
B) too much constraint makes vehicle body be out of shape and be restricted in loading procedure, makes institute's measuring car body rigidity value become large.
Summary of the invention
The features and advantages of the present invention are partly statement in the following description, or can be apparent from this description, or can learn by putting into practice the present invention.
For overcoming the problem of prior art, the invention provides a kind of car white vehicle vehicle body bending stiffness test restraint device, adopt the non-constraint formula stiffness test platform of crossing, just Complete Bind vehicle body space six-freedom degree, eliminate the impact of stand on institute's measuring car body rigidity value, and be easy to realize the adjustment of body gesture.
For solving the problems of the technologies described above, the invention provides a kind of car white vehicle vehicle body bending stiffness test restraint device, comprising:
Worktable;
Reverse crossbeam, it is horizontally installed on the side on worktable by support, and can be around support cross torsion;
The first column and the second column, its lower end is separately positioned on the both sides of reversing crossbeam;
The 3rd column and the 4th column, its lower end respectively opposite side interval on worktable arranges;
Wherein, the top of the first column, the second column, the 3rd column and the 4th column is respectively arranged with the web member that limits three one-movement-freedom-degrees but do not limit three rotational freedoms, for common supporting body in white; The lower end of one of them in the 3rd column and the 4th column is fixed on worktable, in the web member of the lower end of its excess-three column and worktable or torsion crossbeam, one adopts the turning joint of one-directional rotation, and two adopt the web member that limits three one-movement-freedom-degrees but do not limit three rotational freedoms.
According to one embodiment of present invention, three one-movement-freedom-degrees of restriction but the web member that do not limit three rotational freedoms adopts ball pivot or universal coupling.
According to one embodiment of present invention, turning joint is the turning joint rotating longitudinally.
According to one embodiment of present invention, reverse crossbeam and adopt hollow square steel, the pivotal engagement place between itself and support is fixed with stiffening plate.
According to one embodiment of present invention, reverse on crossbeam and be fixed with T-slot, for fixing the web member of the first column and the second column lower end, the first column and the second column can be regulated in T-slot in the lateral attitude of reversing on crossbeam.
According to one embodiment of present invention, the lower surface that reverses crossbeam is fixedly connected with pipe fitting apart from centre of twist a distance, as the load(ing) point of twisting test.
According to one embodiment of present invention, the column that column is adjustable in length, it comprises the female hollow pipe fitting of tool, and the threaded rod being threaded with hollow pipe fitting.
According to one embodiment of present invention, the lower end of the first column is connected with the turning joint that reverses crossbeam employing one-directional rotation, the lower end of the second column and the lower end of reversing crossbeam and the 4th column and worktable adopt the web member that limits three one-movement-freedom-degrees but do not limit three rotational freedoms to be connected, and the lower end of the 3rd column is fixed on worktable.
According to one embodiment of present invention, the lower end of the first column and the second column with reverse that crossbeam adopts three one-movement-freedom-degrees of restriction but the web member that do not limit three rotational freedoms is connected, the lower end of the 4th column adopts the turning joint of one-directional rotation to be connected with worktable, and the lower end of the 3rd column is fixed on worktable.
According to one embodiment of present invention, the web member of body in white and each column upper end is fixed by X-over.
The present invention is directed to existing mistake retrains formula test unit and affects the problem of body stiffness value, design a set of non-constraint stationary installation of crossing according to space mechanism's degree of freedom principle of qualification, by rational layout kinematic pair, make vehicle body space six-freedom degree in bending process of the test all just by Complete Bind, in the time that being installed, fixing vehicle body can not preload its generation, and the body distortion restriction of device that can not suffer restraints in loading procedure, the impact of rigidity value unfettered device in process of the test, and then obtain more accurate rigidity value, effectively improve vehicle body curved, turn round the impact of restraint device on test result in stiffness test process, be conducive to the comparison with batch body stiffness test findings.Meanwhile, utilize the present invention to be easy to realize the adjustment of body gesture.
By reading instructions, those of ordinary skills will understand feature and the content of these technical schemes better.
Accompanying drawing explanation
Below by describing particularly the present invention with reference to accompanying drawing and in conjunction with example, advantage of the present invention and implementation will be more obvious, wherein content shown in accompanying drawing is only for explanation of the present invention, and do not form the restriction of going up in all senses of the present invention, in the accompanying drawings:
Fig. 1 is prior art one car white vehicle body structure torsional rigidity test constraint and charger structural representation;
Fig. 2 is prior art two car white vehicle body structure static angular rigidity testing system structural representations;
Fig. 3 is the structural representation of the embodiment of the present invention one car white vehicle vehicle body bending stiffness test restraint device;
Fig. 4 is the structural representation of constraint mechanism on the embodiment of the present invention one worktable;
Fig. 5 is the structural representation of the embodiment of the present invention one front suspension position constraint mechanism;
Fig. 6 is the structural representation of the embodiment of the present invention one left rear suspension position constraint mechanism;
Fig. 7 is the structural representation of the embodiment of the present invention one right rear suspension position constraint mechanism;
Fig. 8 is the schematic diagram of the embodiment of the present invention one restraint device;
Fig. 9 is the schematic diagram of the embodiment of the present invention two restraint devices;
Figure 10 is the schematic diagram of the embodiment of the present invention three restraint devices;
Figure 11 is the schematic diagram of the embodiment of the present invention four restraint devices.
Embodiment
Retrain formula test unit for existing mistake and affect the problem of body stiffness value, the present invention has designed a set of non-constraint stationary installation of crossing according to space mechanism's degree of freedom principle of qualification, by rational layout kinematic pair, make vehicle body space six-freedom degree in bending process of the test all just by Complete Bind.The present invention is mainly used in the stiffness test of the M1 class car white vehicle vehicle body of " GB/T 15089-2001 motor vehicles and trailer classification " defined.
Embodiment mono-
As shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the car white vehicle vehicle body bending stiffness test restraint device of the present embodiment, comprise: worktable 10, to reverse crossbeam 20, the first column 40(be left front column), the second column 50(is right front column), the 3rd column 60(is left back column) and the 4th column 70(be right back column), wherein reverse crossbeam 20 and be horizontally installed on the side on worktable 10 by support 30, and can be around support 30 cross torsion; The lower end of the first column 40 and the second column 50 is separately positioned on the both sides of reversing crossbeam 20; The lower end of the 3rd column 60 and the 4th column 70 respectively opposite side interval on worktable 10 arranges.
In the present embodiment, the top of the first column 40, the second column 50, the 3rd column 60 and the 4th column 70 is respectively arranged with three one-movement-freedom-degrees of restriction but the web member 41,51,61, the 71(that do not limit three rotational freedoms can select rod end bearing or ball strand), for common supporting body in white 80; The lower end of the first column 40 adopts the turning joint 42 of one-directional rotation to be connected with torsion crossbeam 20, the lower end of the second column 50 and the lower end of reversing crossbeam 20 and the 4th column 70 and worktable 10 adopt the web member 52,72 that limits three one-movement-freedom-degrees but do not limit three rotational freedoms to be connected, and the lower end of the 3rd column 60 is fixed on worktable 10 by bearing 62.
In the present embodiment, limiting three one-movement-freedom-degrees but the web member 41,51,61,71,52,72 that do not limit three rotational freedoms adopts ball pivots, is 3 grades of lower pairs.The outside surface of the internals of ball pivot is spherical, and inside surface is pin-and-hole, can mutually rotate, thereby can rotate in three directions between the outside surface of internals and external member.Ball pivot can large rotation angle along bearing pin (bolt hole), and all the other both directions can only rotate by approximately ± 15 degree.Certainly, also can adopt the web member as universal coupling and so on.In the present embodiment, turning joint 42 is the turning joint rotating longitudinally, can certainly adopt the turning joint in lateral rotation, is 5 grades of lower pairs.
Preferably, torsion crossbeam 20 is horizontally installed on the front side of worktable 10, and two columns 40,50 on torsion crossbeam 20 are for retraining the front suspension position of body in white 80, and two columns 60,70 of rear side are for retraining the rear suspension position of body in white 80.Reverse crossbeam 20 and adopt hollow square steel, it is fixed with stiffening plate (can all weld at the two ends that have pin-and-hole place reinforcement steel plate) with the pivotal engagement place between support 30.Reverse crossbeam 20 upper surface left and right and be respectively welded with T-shaped groove 22,21, for fixing the web member of the first column 40 and the second column 50 lower ends, the first column 40 and the second column 50 can be regulated in T-slot 22,21 in the lateral attitude of reversing on crossbeam 20.The lower surface that reverses crossbeam 20 is fixedly connected with pipe fitting 23,24(as shown in Figure 5 apart from centre of twist a distance (as 1 meter of), can adopt the mode of welding round steel pipe), as the load(ing) point of twisting test.All columns are the column of adjustable in length, it comprises the female hollow pipe fitting of tool, and the threaded rod being threaded with hollow pipe fitting, can also be furnished with set nut, preferably, the two ends of hollow pipe fitting adopt reverse screw thread, distinguish connecting thread bar, just can adjust like this length of column by rotating hollow pipe fitting.Body in white 80 can be fixed by X-over with the web member 41,51,61,71 of each column upper end.
The present embodiment comprises five movable parts, i.e. left front, right front, right back column, body in white, torsion crossbeam comprises 6 ball pivots and 2 one-directional rotation hinges, and ball pivot is 3 grades of lower pairs, and one-directional rotation hinge is 5 grades of lower pairs.The present invention has introduced enough kinematic pair quantity and has rationally effectively combined, and makes 6 spatial degrees of freedom of vehicle body just by Complete Bind, and vehicle body degree of freedom is 0.Constraint principles as shown in Figure 8, for the space mechanism of the common composition of vehicle body, column, torsion crossbeam and worktable, the constraint number that its degree of freedom=all movable part degree of freedom-all kinematic pairs are introduced, that is:
F=6n-5P5-4P4-3P3-2P2-P1-k
=6×5-5×2-4×0-3×6-2×0-1×0-2=0
Visible, no matter reverse and load or bending loading, if do not consider the impact of fit-up gap and device rigidity, will only have so body distortion.
After installing according to Fig. 3, adjust column length and vehicle body position detected with level meter.In the time carrying out bending test, vehicle body chair mounted place is loaded downwards simultaneously; While carrying out twisting test, the pipe fitting 23,24 reversing on crossbeam 20 is loaded.In loading procedure, because vehicle body degree of freedom is zero, the rigidity of restraint device is much larger than body stiffness, and self can not deform; Each column and torsion crossbeam will move along with the distortion of vehicle body, and do not affect the bending rigidity of vehicle body.
Like this, by 2 revolute pairs of rational layout and 6 ball pairs, make 6, vehicle body space degree of freedom just by Complete Bind, in the time that fixing vehicle body is installed, can not preload its generation and loading procedure in can the not suffer restraints restriction of device of body distortion, and then effectively improved vehicle body curved, turn round the impact of restraint device on test result in stiffness test process, be conducive to the comparison with batch body stiffness test findings.
Embodiment bis-
As shown in Figure 9, in embodiment bis-, the lower end of the first column 40 and the second column 50 with reverse that crossbeam 20 adopts three one-movement-freedom-degrees of restriction but the web member (for example adopting ball pivot) that do not limit three rotational freedoms is connected, the lower end of the 4th column 70 adopts the turning joint of one-directional rotation to be connected with worktable 10, and the lower end of the 3rd column 60 is fixed on worktable 10.Remaining structure is identical with embodiment mono-, is no longer repeated in this description herein.
Utilize the structure of embodiment bis-, make equally 6 spatial degrees of freedom of vehicle body just by Complete Bind, vehicle body degree of freedom is 0, can realize equally object of the present invention.
Embodiment tri-
As shown in figure 10, in embodiment tri-, the lower end of the second column 50 adopts the turning joint of one-directional rotation to be connected with torsion crossbeam 20, the lower end of the first column 40 and the lower end of reversing crossbeam 20 and the 4th column 70 and worktable 10 adopt the web member (for example adopting ball pivot) that limits three one-movement-freedom-degrees but do not limit three rotational freedoms to be connected, and the lower end of the 3rd column 60 is fixed on worktable 10.Remaining structure is identical with embodiment mono-, is no longer repeated in this description herein.
Utilize the structure of embodiment tri-, make equally 6 spatial degrees of freedom of vehicle body just by Complete Bind, vehicle body degree of freedom is 0, can realize equally object of the present invention.
Embodiment tetra-
As shown in figure 11, in embodiment tetra-, the lower end of the first column 40 adopts the turning joint of one-directional rotation to be connected with torsion crossbeam 20, the lower end of the second column 50 and the lower end of reversing crossbeam 20 and the 3rd column 60 and worktable 10 adopt the web member (for example adopting ball pivot) that limits three one-movement-freedom-degrees but do not limit three rotational freedoms to be connected, and the lower end of the 4th column 70 is fixed on worktable 10.Remaining structure is identical with embodiment mono-, is no longer repeated in this description herein.
Utilize the structure of embodiment tetra-, make equally 6 spatial degrees of freedom of vehicle body just by Complete Bind, vehicle body degree of freedom is 0, can realize equally object of the present invention.
With reference to the accompanying drawings of the preferred embodiments of the present invention, those skilled in the art do not depart from the scope and spirit of the present invention above, can have multiple flexible program to realize the present invention.For example, illustrate as the part of an embodiment or the feature described can be used for another embodiment to obtain another embodiment.These are only the better feasible embodiment of the present invention, not thereby limit to interest field of the present invention, the equivalence that all utilizations instructions of the present invention and accompanying drawing content are done changes, within being all contained in interest field of the present invention.
Claims (10)
1. a car white vehicle vehicle body bending stiffness test restraint device, is characterized in that comprising:
Worktable;
Reverse crossbeam, it is horizontally installed on the side on described worktable by support, and can be around described support cross torsion;
The first column and the second column, its lower end is separately positioned on the both sides of described torsion crossbeam;
The 3rd column and the 4th column, its lower end respectively opposite side interval on described worktable arranges;
Wherein, the top of described the first column, the second column, the 3rd column and the 4th column is respectively arranged with the web member that limits three one-movement-freedom-degrees but do not limit three rotational freedoms, for common supporting body in white; The lower end of one of them in described the 3rd column and the 4th column is fixed on described worktable, in the web member of the lower end of its excess-three column and described worktable or described torsion crossbeam, one adopts the turning joint of one-directional rotation, and two adopt the web member that limits three one-movement-freedom-degrees but do not limit three rotational freedoms.
2. car white vehicle vehicle body bending stiffness test restraint device according to claim 1, is characterized in that, three one-movement-freedom-degrees of described restriction but the web member that do not limit three rotational freedoms adopts ball pivot or universal coupling.
3. car white vehicle vehicle body bending stiffness test restraint device according to claim 1, is characterized in that, described turning joint is the turning joint rotating longitudinally.
4. car white vehicle vehicle body bending stiffness test restraint device according to claim 1, is characterized in that, described torsion crossbeam adopts hollow square steel, and the pivotal engagement place between itself and described support is fixed with stiffening plate.
5. car white vehicle vehicle body bending stiffness test restraint device according to claim 1, it is characterized in that, on described torsion crossbeam, be fixed with T-slot, for the web member of fixing described the first column and the second column lower end, described the first column and the second column lateral attitude on described torsion crossbeam can be regulated in described T-slot.
6. car white vehicle vehicle body bending stiffness test restraint device according to claim 1, is characterized in that, the lower surface of described torsion crossbeam is fixedly connected with pipe fitting apart from centre of twist a distance, as the load(ing) point of twisting test.
7. car white vehicle vehicle body bending stiffness test restraint device according to claim 1, is characterized in that, the column that described column is adjustable in length, and it comprises the female hollow pipe fitting of tool, and the threaded rod being threaded with described hollow pipe fitting.
8. according to the car white vehicle vehicle body bending stiffness test restraint device described in any one in claim 1-7, it is characterized in that, the lower end of described the first column adopts the turning joint of one-directional rotation to be connected with described torsion crossbeam, the lower end of the lower end of described the second column and described torsion crossbeam and described the 4th column adopts three one-movement-freedom-degrees of restriction with described worktable but the web member that do not limit three rotational freedoms is connected, and the lower end of described the 3rd column is fixed on described worktable.
9. according to the car white vehicle vehicle body bending stiffness test restraint device described in any one in claim 1-7, it is characterized in that, the lower end of described the first column and described the second column adopts three one-movement-freedom-degrees of restriction with described torsion crossbeam but the web member that do not limit three rotational freedoms is connected, the lower end of described the 4th column adopts the turning joint of one-directional rotation to be connected with described worktable, and the lower end of described the 3rd column is fixed on described worktable.
10. according to the car white vehicle vehicle body bending stiffness test restraint device described in any one in claim 1-7, it is characterized in that, the web member of described body in white and each column upper end is fixed by X-over.
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| CN107588965A (en) * | 2017-07-25 | 2018-01-16 | 武汉智能控制工业技术研究院有限公司 | A kind of device of car test for static load |
| CN107588965B (en) * | 2017-07-25 | 2019-07-05 | 武汉智能控制工业技术研究院有限公司 | A kind of device of car test for static load |
| CN109308365A (en) * | 2017-07-28 | 2019-02-05 | 上海汽车集团股份有限公司 | The sagging rigidity simulating experimental of the finite element modeling method and car door of body hinge |
| CN109308365B (en) * | 2017-07-28 | 2023-05-23 | 上海汽车集团股份有限公司 | Finite element modeling method of door hinge and door sagging stiffness simulation test method |
| CN108020429A (en) * | 2017-11-28 | 2018-05-11 | 中国汽车工程研究院股份有限公司 | Ordinary passenger car white body torsion stiffness loading device for testing |
| CN108020429B (en) * | 2017-11-28 | 2024-02-09 | 中国汽车工程研究院股份有限公司 | Common passenger car body-in-white torsional rigidity test loading device |
| CN107991196A (en) * | 2017-12-28 | 2018-05-04 | 上汽通用五菱汽车股份有限公司 | A kind of car white vehicle vehicle body joint stiffness measuring device |
| CN109708832A (en) * | 2019-01-16 | 2019-05-03 | 江苏大学 | A kind of car white vehicle body torsional rigdity test fixture |
| WO2021073581A1 (en) * | 2019-10-16 | 2021-04-22 | 王宏福 | Automobile tuning platform and mule car |
| CN112504693A (en) * | 2020-11-25 | 2021-03-16 | 东风柳州汽车有限公司 | Static rigidity test device for body-in-white structure |
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