A vehicle door stiffness restraint test device and method

Abstract

The present application belongs to the technical field of automobile parts test, and particularly relates to a door stiffness restraint test device and method; the device comprises a gantry frame, a left hinge restraint tooling assembly, a right door lock restraint tooling assembly, an upper window frame restraint tooling assembly and a lower door lower edge restraint tooling assembly; a plurality of left hinge restraint tooling assemblies are arranged on the left column of the gantry frame from top to bottom; and the right column of the gantry frame is provided with the right door lock restraint tooling assembly; the present application can restrain the stiffness test of all doors by using the same method, and can improve the test accuracy and the unity of CAE analysis and test results by unifying the door restraint method.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile parts test, and particularly relates to a door stiffness restraint test device and method. BACKGROUND

[0002] The door stiffness test is to measure the stiffness values of each point needed to measure the stiffness value on the door to ensure the safety and quality of the door in use. The same door stiffness test is divided into 13 test conditions in the test process, including door vertical stiffness, window frame lateral stiffness, windshield lower belt stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, armrest support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness, hinge fixed point stiffness, outer plate surface stiffness and door lock fixed point stiffness.

[0003] However, in the existing test process, the restraint method and device used for the door are different in various models of doors and various conditions of the same door, which finally causes the deviation of the test results and the large deviation of the CAE analysis results and the test results, and further causes the inability to accurately measure and evaluate the door stiffness value, seriously reduces the work efficiency and wastes a large amount of human resources. SUMMARY

[0004] In order to overcome the above problems, the application provides a door stiffness restraint test device and method; all door stiffness tests can be restrained by using the same method, the test precision is improved by unifying the door restraint method, and the unification of the CAE analysis and test results is improved.

[0005] A door stiffness restraint test device, comprising a gantry frame 1, a left side hinge restraint tool assembly 2, a right side door lock restraint tool assembly 3, an upper side window frame restraint tool assembly 4 and a lower side door lower edge restraint tool assembly 5; a plurality of left side hinge restraint tool assemblies 2 are arranged on the left side column 12 of the gantry frame 1 from top to bottom, the right side column 12 of the gantry frame 1 is provided with the right side door lock restraint tool assembly 3, the upper side of the gantry frame 1 is provided with two upper side window frame restraint tool assemblies 4, and the lower side of the gantry frame 1 is provided with two lower side door lower edge restraint tool assemblies 5;

[0006] The left hinge constraint tool assembly 2 comprises a hinge constraint fixing seat 21, a hinge constraint X-direction telescopic rod 22, a hinge constraint Y-direction telescopic rod 23 and a hinge constraint L-shaped mounting plate 26, wherein the hinge constraint fixing seat 21 is bolted on the column 12 on the left side of the gantry frame 1, and the front end of the hinge constraint fixing seat 21 is provided with a first base square groove 24, the hinge constraint X-direction telescopic rod 22 is inserted and bolted in the first base square groove 24, and the right side of the hinge constraint X-direction telescopic rod 22 is provided with a first disc 25, the hinge constraint Y-direction telescopic rod 23 is arranged on the first disc 25, and the other end is fixed with the hinge constraint L-shaped mounting plate 26 for installing a hinge on the front end face;

[0007] The right door lock constraint tool assembly 3 comprises a door lock constraint fixing seat 31, a door lock constraint X-direction telescopic rod 32, a door lock constraint Y-direction telescopic rod 33 and a door lock constraint clamp 34, wherein the door lock constraint fixing seat 31 is fixed on the column 12 on the right side of the gantry frame 1, and the front end of the door lock constraint fixing seat 31 is provided with a second base square groove 35, the door lock constraint X-direction telescopic rod 32 is inserted and bolted in the second base square groove 35, and the left side of the top surface of the door lock constraint X-direction telescopic rod 32 is provided with a second disc 36, the door lock constraint Y-direction telescopic rod 33 is arranged on the second disc 36, and the other end is provided with a third disc 37 on the front end face, the door lock constraint clamp 34 is connected on the third disc 37, and the third disc 37 is provided with a fish eye bearing;

[0008] The upper window frame constraint tool assembly 4 comprises a window frame constraint fixing seat 41, a window frame constraint Y-direction telescopic rod 42, a window frame constraint Z-direction telescopic rod 43 and a window frame upper edge constraint clamp 44, wherein the window frame constraint fixing seat 41 is fixed on the bottom of the upper beam 13 of the gantry frame 1, and the bottom surface of the window frame constraint fixing seat 41 is provided with a third base square groove 45, the window frame constraint Y-direction telescopic rod 42 is inserted and bolted in the third base square groove 45, and the front end of the right side of the window frame constraint Y-direction telescopic rod 42 is provided with a fourth disc 46, the window frame constraint Z-direction telescopic rod 43 is arranged on the fourth disc 46, and the other end is provided with a fifth disc 47 on the bottom, and the window frame upper edge constraint clamp 44 is connected on the fifth disc 47 through a sixth disc 48 on the top;

[0009] The lower side door lower edge constraint tool assembly 5 comprises a door lower edge fixing seat 51, a door lower edge Z-direction telescopic rod 52, a door lower edge Y-direction telescopic rod 53 and a door lower edge constraint clamp 54; wherein the door lower edge fixing seat 51 is fixed at the front end of the lower crossbeam 14 of the gantry frame 1, and the front end of the door lower edge fixing seat 51 is provided with a fourth base square groove 55, the door lower edge Z-direction telescopic rod 52 is inserted into and bolted in the fourth base square groove 55, and the top right side of the door lower edge Z-direction telescopic rod 52 is provided with a seventh disc 56, one end of the door lower edge Y-direction telescopic rod 53 is arranged on the seventh disc 56, and the other end is provided with an eighth disc 57 on the top surface of the end, and the door lower edge constraint clamp 54 is connected to the eighth disc 57 through a ninth disc 58.

[0010] The gantry frame 1 comprises a base 11, a column 12, an upper crossbeam 13 and a lower crossbeam 14, wherein the column 12 is fixed on the base 11, and the upper and lower ends between the columns 12 are connected together through the upper crossbeam 13 and the lower crossbeam 14 respectively.

[0011] The front end surface of the column 12 of the gantry frame 1 is provided with uniformly arranged threaded holes.

[0012] The upper crossbeam 13 and the lower crossbeam 14 of the gantry frame 1 are both I-shaped crossbeams, the bottom surface of the upper crossbeam 13 is provided with a clamp mounting hole, the front end surface of the lower crossbeam 14 is provided with a threaded mounting hole, and the two ends of the upper crossbeam 13 and the lower crossbeam 14 are respectively fixed on the corresponding columns 12 through steel plates.

[0013] The first disc 25 is provided with a long hole, the hinge constraint Y-direction telescopic rod 23 is provided with a long hole corresponding to the long hole on the first disc 25, for bolt connection with the first disc 25 and Y-direction position adjustment, and the one side plate of the hinge constraint L-shaped mounting plate 26 is fixed on the end of the hinge constraint Y-direction telescopic rod 23, and the other side plate is provided with a plurality of long holes in horizontal and vertical distribution for mounting hinges.

[0014] The second disc 36 is provided with a long hole, the door lock constraint Y-direction telescopic rod 33 is provided with a long hole corresponding to the long hole on the second disc 36, for bolt connection with the second disc 36 and Y-direction position adjustment; the door lock constraint clamp 34 is an L-shaped plate, the right end of one side plate thereof is in arc shape, the side plate is connected to the third disc 37, and the side plate is provided with a through hole corresponding to the fish eye bearing in the third disc 37, and the other side plate of the door lock constraint clamp 34 is provided with a plurality of long holes in horizontal and vertical distribution for connecting with door lock mounting holes.

[0015] The fourth disc 46 is provided with a long hole, the window frame constraint Z-direction telescopic rod 43 is provided with a long hole corresponding to the long hole on the fourth disc 46, for bolt connection with the fourth disc 46 and Z-direction position adjustment and X-axis angle adjustment; the sixth disc 48 is movably connected to the bottom of the fifth disc 47, and can be adjusted in angle around the Z-axis.

[0016] The seventh disc 56 is provided with a long hole, the door lower edge Y-direction telescopic rod 53 is provided with a long hole corresponding to the long hole of the seventh disc 56, and is used for bolt connection with the seventh disc 56, Y-direction position adjustment and Z-axis angle adjustment; the ninth disc 58 is movably connected to the top of the eighth disc 57, and can be adjusted in the Z-axis angle.

[0017] A vehicle door stiffness constraint test method, the original thirteen kinds of working conditions are divided into five test constraint categories according to the different constraint methods, which are respectively: vehicle door vertical stiffness category; window frame horizontal stiffness category; windshield lower belt stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, handrail support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness category; hinge fixed point stiffness, outer plate surface stiffness, door lock fixed point stiffness category; special category-sliding door inner plate fixed point stiffness category; the stiffness test working conditions of different models of vehicle doors are realized by one of the five categories to measure the stiffness value; the specific content is as follows:

[0018] Category one: vehicle door vertical stiffness category

[0019] It is applied to vehicle door vertical stiffness. The vehicle door vertical stiffness is to constrain the vehicle door hinge, and to measure the deformation of the vehicle door by applying a downward force at the door lock in the closed state of the vehicle door. The left hinge constraint tooling assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges. The position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted to achieve the hinge installation spacing and the installation height distance from the ground. The extension distance of the hinge constraint Y-direction telescopic rod 23 installation surface is adjusted to achieve the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixed point. Finally, the upper and lower hinges of the vehicle door are connected with the hinge constraint L-shaped mounting plate 26 on the top end of the hinge constraint Y-direction telescopic rod 23 by bolts. The displacement sensor is used to measure the subsidence at the door lock by loading the cylinder downward at the door lock. Finally, the vertical stiffness value of the vehicle door is obtained.

[0020] Category two: window frame horizontal stiffness category

[0021] Applied to the transverse stiffness of the window frame, the transverse stiffness of the window frame is to measure the deformation of the door window frame by applying a transverse force at the top and midpoint of the window frame under the condition that the door hinge is fully constrained, the door lock is fully constrained, and the door is closed. Wherein the left hinge constraint tool assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges: adjust the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21, so that the hinge installation distance and the distance from the ground installation height are reached; adjust the extension distance of the hinge constraint Y direction telescopic rod 23 installation surface to reach the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixed point; then use the right door lock constraint tool assembly 3 to constrain the six degrees of freedom of the door lock: adjust the height of the right door lock constraint tool assembly 3 to the door lock installation position, adjust the position of the door lock constraint Y direction telescopic rod 33, so that it reaches the door lock position, the round rod fixed clamp installed on the door lock passes through the through hole on the arc side plate of the door lock constraint clamp 34, and then passes into the fish eye bearing at the front end of the door lock constraint Y direction telescopic rod 33, completing the constraint of the six degrees of freedom of the door lock; the loading cylinder is used to load the standard force on the top and midpoint of the window frame, and the deformation of the window frame is measured on the opposite side of the window frame;

[0022] Classification three: wind window lower belt line stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, handrail support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness

[0023] Applied to the wind window lower belt line stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, handrail support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness, the six degrees of freedom of the upper and lower hinges are constrained when the eight working conditions are constrained, and the six degrees of freedom of the door lock are constrained; the left hinge constraint tool assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges: adjust the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21, so that the hinge installation distance and the distance from the ground installation height are reached; adjust the extension distance of the hinge constraint Y direction telescopic rod 23 installation surface to reach the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixed point; the right door lock constraint tool assembly 3 is used to constrain the six degrees of freedom of the door lock: adjust the height of the right door lock constraint tool assembly 3 to the door lock installation position, adjust the position of the door lock constraint Y direction telescopic rod 33, so that it reaches the door lock position, in the process of door lock fixing, because the door lock installation surface has an angle, so the connection between the door lock constraint Y direction telescopic rod 33 and the second disc 36 at the top of the door lock constraint X direction telescopic rod 32 is adjusted to complete the constraint of the six degrees of freedom of the door lock; the loading cylinder is used to load the points or holes to be measured, and the deformation of each measured point or hole is measured by the displacement sensor;

[0024] Classification four: hinge fixed point stiffness, outer plate surface stiffness, door lock fixed point stiffness class;

[0025] Applied to hinge fixed point stiffness, outer plate surface stiffness, door lock fixed point stiffness; outer plate surface stiffness constraint conditions: vehicle door upper and lower hinge constraints six degrees of freedom, door lock constraints six degrees of freedom, vehicle door lower end two sides constraints six degrees of freedom; hinge fixed point stiffness is to remove one of the hinges and measure the stiffness of its fixed point, other constraint conditions are the same as outer plate surface stiffness constraint conditions; door lock fixed point stiffness is to release the constraint at the door lock and release the constraint at the lower edge of the hinge side; use left hinge constraint tool assembly 2 to constrain the six degrees of freedom of the upper and lower hinge side: adjust the position of the hinge constraint fixed seat 21 in Z direction and the distance between the two hinge constraint fixed seats 21, so that it reaches the hinge installation spacing and the installation height distance from the ground; adjust the extension distance of the hinge constraint Y direction telescopic rod 23 mounting surface to reach the distance standard that the force loading cylinder does not interfere with the gantry frame when loading the hinge fixed point; use right door lock constraint tool assembly 3 to constrain six degrees of freedom of the door lock: adjust the height of the right door lock constraint tool assembly 3 to the door lock installation position, adjust the position of the door lock constraint Y direction telescopic rod 33, so that it reaches the door lock position. During the door lock fixing process, since the door lock mounting surface has an angle, the six degrees of freedom of the door lock are constrained by angle adjustment through the second disc 36 on the top of the door lock constraint X direction telescopic rod 32 and the door lock constraint Y direction telescopic rod 33, the door lock constraint Y direction telescopic rod 33 and the door lock constraint clamp 34 mounting surface; adjust the position of the door lower edge Z direction telescopic rod 52 and fix it on the door lower edge fixed seat 51 with bolts, clamp the two ends of the vehicle door lower edge through the door lower edge constraint clamp 54, and then constrain the six degrees of freedom of the lower edge; since the vehicle door lower edge usually has an angle in X direction and Z direction during installation, the angle is adjusted through the seventh disc 56 on the door lower edge Z direction telescopic rod 52 and the door lower edge Y direction telescopic rod 53, the eighth disc 57 on the door lower edge Y direction telescopic rod 53 and the ninth disc 58 under the door lower edge constraint clamp 54; use the loading cylinder to load the points or holes to be measured, and measure the deformation of each measured point or hole through the displacement sensor;

[0026] Classification five: special class - sliding door inner plate fixed point stiffness class;

[0027] The special case classification belongs to the constraint of the sliding door inner plate fixed point test; in the sliding door inner plate fixed point test, the upper and lower hinges are constrained in six degrees of freedom, the door lock is constrained in six degrees of freedom, the lower edge of the door is constrained in six degrees of freedom, and the upper edge of the window frame is constrained in six degrees of freedom; the left hinge constraint tool assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinge sides: the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted to achieve the hinge installation spacing and the distance from the ground installation height; the installation face of the hinge constraint Y direction telescopic rod 23 is adjusted to achieve the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixed point; the right door lock constraint tool assembly 3 is used to constrain the six degrees of freedom of the door lock: the height of the right door lock constraint tool assembly 3 is adjusted to the door lock installation position, and the position of the door lock constraint Y direction telescopic rod 33 is adjusted to achieve the door lock position; during the door lock fixing process, since the door lock installation face has an angle, the third disc 37 on the door lock constraint Y direction telescopic rod 33 and the second disc 36 on the left side of the door lock constraint X direction telescopic rod 32, the arc side plate on the door lock constraint clamp 34 and the third disc 37 at the rear end of the door lock constraint clamp 34 are angle adjusted to complete the constraint of the six degrees of freedom of the door lock; the position of the door lower edge Z direction telescopic rod 52 is adjusted, and the two ends of the lower edge of the vehicle door are clamped and constrained by the door lower edge constraint clamp 54 to constrain the six degrees of freedom of the lower edge; since the lower edge of the vehicle door usually has an angle in the X direction and the Z direction during installation, the seventh disc 56 on the door lower edge Z direction telescopic rod 52 and the door lower edge Y direction telescopic rod 53, the eighth disc 57 on the door lower edge Y direction telescopic rod 53 and the ninth disc 58 below the door lower edge constraint clamp 54 are angle adjusted; the position of the window frame constraint Y direction telescopic rod 42 is adjusted, and the two ends of the upper edge of the vehicle door window frame are clamped by the window frame upper edge constraint clamp 44 to constrain the six degrees of freedom of the upper edge; since the upper edge of the vehicle door window frame usually has an angle in the X direction and the Z direction during installation, the fourth disc 46 on the window frame constraint Y direction telescopic rod 42 and the window frame constraint Z direction telescopic rod 43, the fifth disc 47 on the window frame constraint Z direction telescopic rod 43 and the sixth disc 48 on the window frame upper edge constraint clamp 44 are angle adjusted; the loading cylinder is used to load the holes to be measured, and the displacement sensor is used to measure the deformation of each measured hole.

[0028] The beneficial effects of the present application are as follows:

[0029] The present application can constrain all door stiffness tests with the same method, divide the 13 kinds of working conditions of the same door into five different constraint schemes, and measure the stiffness value of the same working condition of different models of doors through one of the five schemes; ensure that different models of doors and the same model of doors in different working conditions can achieve the same constraint standard, make the constraint condition closer to the test standard requirement, the test precision higher, the CAE analysis and the test result easier to match, and the work efficiency more efficient. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 This is a schematic diagram of the left hinge constraint tooling assembly of the present invention.

[0033] Figure 3 This is a schematic diagram of the right-side door lock constraint fixture assembly of the present invention.

[0034] Figure 4 This is a schematic diagram of the upper window frame constraint fixture assembly of the present invention.

[0035] Figure 5 This is a schematic diagram of the lower edge constraint tooling assembly of the lower side door of the present invention. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0039] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and other orientation or positional relationships shown in the drawings are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] Embodiment 1

[0041] As shown in Figure 1 , a vehicle door stiffness restraint test device includes a gantry frame 1, a left hinge restraint tool assembly 2, a right door lock restraint tool assembly 3, an upper side window frame restraint tool assembly 4, and a lower side door lower edge restraint tool assembly 5. Two left hinge restraint tool assemblies 2 are arranged on the left column 12 of the gantry frame 1 from top to bottom, one right door lock restraint tool assembly 3 is arranged on the right column 12 of the gantry frame 1, two upper side window frame restraint tool assemblies 4 are arranged above the gantry frame 1, and two lower side door lower edge restraint tool assemblies 5 are arranged below the gantry frame 1.

[0042] As shown in Figure 2 , the left hinge restraint tool assembly 2 includes a hinge restraint fixed seat 21, a hinge restraint X-direction telescopic rod 22, a hinge restraint Y-direction telescopic rod 23, and a hinge restraint L-shaped mounting plate 26. The hinge restraint fixed seat 21 is bolted to the left column 12 of the gantry frame 1, and the front end of the hinge restraint fixed seat 21 is provided with a first base square groove 24. The hinge restraint X-direction telescopic rod 22 is inserted into and bolted in the first base square groove 24, and the right side upper end of the hinge restraint X-direction telescopic rod 22 is provided with a first disc 25. The hinge restraint Y-direction telescopic rod 23 is arranged on the first disc 25, and the other end is fixed with the hinge restraint L-shaped mounting plate 26 for mounting the hinge on the front end face.

[0043] As shown in Figure 3As shown, the right door lock constraint tool assembly 3 includes a door lock constraint fixed base 31, a door lock constraint X-direction telescopic rod 32, a door lock constraint Y-direction telescopic rod 33, and a door lock constraint clamp 34. The door lock constraint fixed base 31 is fixed on the upright column 12 on the right side of the gantry frame 1, and the front end of the door lock constraint fixed base 31 is provided with a second base square groove 35. The door lock constraint X-direction telescopic rod 32 is inserted into and bolted in the second base square groove 35, and the left side top surface of the door lock constraint X-direction telescopic rod 32 is provided with a second disc 36. The door lock constraint Y-direction telescopic rod 33 is arranged on the second disc 36 at one end, and the other end is provided with a third disc 37 on the front end face. The door lock constraint clamp 34 is connected to the third disc 37 at the rear end, and the third disc 37 is provided with a fish-eye bearing.

[0044] As shown, Figure 4 the upper window frame constraint tool assembly 4 includes a window frame constraint fixed base 41, a window frame constraint Y-direction telescopic rod 42, a window frame constraint Z-direction telescopic rod 43, and a window frame upper edge constraint clamp 44. The window frame constraint fixed base 41 is fixed on the bottom of the upper cross beam 13 of the gantry frame 1, and the bottom surface of the window frame constraint fixed base 41 is provided with a third base square groove 45. The window frame constraint Y-direction telescopic rod 42 is inserted into and bolted in the third base square groove 45, and the front end right side of the window frame constraint Y-direction telescopic rod 42 is provided with a fourth disc 46. The window frame constraint Z-direction telescopic rod 43 is arranged on the fourth disc 46 at one end, and the other end is provided with a fifth disc 47 on the bottom. The window frame upper edge constraint clamp 44 is connected to the fifth disc 47 through a sixth disc 48 at the top.

[0045] As shown, Figure 5 the lower door lower edge constraint tool assembly 5 includes a door lower edge fixed base 51, a door lower edge Z-direction telescopic rod 52, a door lower edge Y-direction telescopic rod 53, and a door lower edge constraint clamp 54. The door lower edge fixed base 51 is fixed on the front end of the lower cross beam 14 of the gantry frame 1, and the front end of the door lower edge fixed base 51 is provided with a fourth base square groove 55. The door lower edge Z-direction telescopic rod 52 is inserted into and bolted in the fourth base square groove 55, and the top right side of the door lower edge Z-direction telescopic rod 52 is provided with a seventh disc 56. The door lower edge Y-direction telescopic rod 53 is arranged on the seventh disc 56 at one end, and the other end is provided with an eighth disc 57 on the top surface of the end. The door lower edge constraint clamp 54 is connected to the eighth disc 57 through a ninth disc 58.

[0046] The gantry frame 1 includes a base 11, upright columns 12, an upper cross beam 13, and a lower cross beam 14. The upright columns 12 are fixed on the base 11, and the upper and lower ends between the upright columns 12 are connected together through the upper cross beam 13 and the lower cross beam 14, respectively.

[0047] The front end face of the upright column 12 of the gantry frame 1 is provided with uniformly arranged threaded holes.

[0048] The upper beam 13 and the lower beam 14 of the portal frame 1 are both I-shaped beams, the bottom surface of the upper beam 13 is provided with two rows of clamp mounting holes, and the front end surface of the lower beam 14 is provided with threaded mounting holes, and the two ends of the upper beam 13 and the lower beam 14 are fixed on the corresponding columns 12 through steel plates.

[0049] The first disc 25 is provided with a long hole, the hinge constraint Y-direction telescopic rod 23 is provided with a long hole corresponding to the long hole of the first disc 25, which is used for bolt connection with the first disc 25 at the top end of the hinge constraint X-direction telescopic rod 22 and Y-direction position adjustment, and the hinge constraint L-shaped mounting plate 26 is fixed on the end of the hinge constraint Y-direction telescopic rod 23, and the other side plate is provided with a plurality of long holes in horizontal and vertical distribution for installing hinges.

[0050] The second disc 36 is provided with a long hole, the door lock constraint Y-direction telescopic rod 33 is provided with a long hole corresponding to the long hole of the second disc 36, which is used for bolt connection with the second disc 36 at the top end of the door lock constraint X-direction telescopic rod 32 and Y-direction position adjustment; the door lock constraint clamp 34 is an L-shaped plate, the right end of one side plate is a circular arc, the side plate is connected to the third disc 37, and the side plate is provided with a through hole corresponding to the fish eye bearing in the third disc 37, and the other side plate of the door lock constraint clamp 34 is provided with a plurality of long holes in horizontal and vertical distribution for connecting with the door lock mounting hole.

[0051] The fourth disc 46 is provided with a long hole, the window frame constraint Z-direction telescopic rod 43 is provided with a long hole corresponding to the long hole of the fourth disc 46, which is used for bolt connection with the fourth disc 46 at the top end of the window frame constraint Y-direction telescopic rod 42 and Z-direction position adjustment and X-axis angle adjustment; the sixth disc 48 is movably connected to the fifth disc 47 at the top end of the window frame constraint Z-direction telescopic rod 43, and can be adjusted in angle around the Z-axis.

[0052] The seventh disc 56 is provided with a long hole, the door lower edge Y-direction telescopic rod 53 is provided with a long hole corresponding to the long hole of the seventh disc 56, which is used for bolt connection with the seventh disc 56 at the top end of the door lower edge Z-direction telescopic rod 52 and Y-direction position adjustment and Z-axis angle adjustment; the ninth disc 58 is movably connected to the top of the eighth disc 57, and can be adjusted in angle around the Z-axis.

[0053] A vehicle door stiffness restraint test method, the original thirteen kinds of working conditions are divided into five test restraint categories according to the different restraint methods, which are respectively vehicle door vertical stiffness class, window frame horizontal stiffness class, windshield lower belt line stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, handrail support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness class, hinge fixed point stiffness, outer plate surface stiffness, door lock fixed point stiffness class, and special class-sliding door inner plate fixed point stiffness class. The stiffness test working conditions of different types of vehicle doors are realized by one of the five categories, and the specific content is as follows:

[0054] Category one: vehicle door vertical stiffness class

[0055] Applied to vehicle door vertical stiffness, the vehicle door hinge is fully constrained, and the downward force is applied at the door lock in the closed state of the door to measure the deformation of the door. The gantry frame 1 and the left hinge restraint tooling assembly 2 are used to achieve the restraint requirement, and the left hinge restraint tooling assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges. The hinge restraint fixed seat 21 of the left hinge restraint tooling assembly 2 is installed on the left side of the gantry frame 1, the position of the hinge restraint fixed seat 21 in the Z direction and the distance between the two hinge restraint fixed seats 21 are adjusted to achieve the hinge installation spacing and the installation height distance from the ground. The upper and lower hinge restraint X-direction telescopic rods 22 are installed, the hinge restraint X-direction telescopic rods 22 are fixed with the hinge restraint fixed seat 21 by bolts, the upper and lower hinge restraint Y-direction telescopic rods 23 are installed at the top end of the hinge restraint X-direction telescopic rods 22 by bolts, and the extension distance of the hinge restraint Y-direction telescopic rods 23 is adjusted to reach the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixed point. Finally, the upper and lower hinges of the vehicle door are connected with the installation surface of the hinge restraint L-shaped mounting plate 26 at the top end of the hinge restraint Y-direction telescopic rods 23 by bolts. The downward load is applied at the door lock by the loading cylinder, the displacement sensor is used to measure the subsidence at the door lock, and finally the vertical stiffness value of the vehicle door is obtained. This is the restraint test scheme of the vehicle door vertical stiffness.

[0056] Category two: window frame horizontal stiffness class

[0057] The application is applied to the lateral stiffness of window frame. The lateral stiffness of window frame is to measure the deformation of window frame by applying lateral force on the top and middle point of window frame under the condition that the door hinge is fully constrained, the door lock is fully constrained and the door is closed. The gantry frame 1 and the left hinge constraint tool assembly 2 are used to achieve the constraint requirement. The left hinge constraint tool assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges. The hinge constraint fixing seat 21 of the left hinge constraint tool assembly 2 is installed on the left side of the gantry frame 1. The position of the hinge constraint fixing seat 21 in the Z direction and the distance between the two hinge constraint fixing seats 21 are adjusted so that the hinge installation distance and the installation height distance from the ground are achieved. The upper and lower hinge constraint X-direction telescopic rods 22 are installed. The hinge constraint X-direction telescopic rods 22 are fixed to the hinge constraint fixing seat 21 by bolts. The upper and lower hinge constraint Y-direction telescopic rods 23 are installed at the top end of the hinge constraint X-direction telescopic rods 22 by bolts. The extension distance of the hinge constraint Y-direction telescopic rods 23 is adjusted to achieve the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixing point. The right door lock constraint tool assembly 3 is used to constrain the six degrees of freedom of the door lock. The door lock constraint fixing seat 31 of the right door lock constraint tool assembly 3 is installed on the right side of the gantry frame 1. The height of the right door lock constraint tool assembly 3 is adjusted to the door lock installation position. The door lock constraint X-direction telescopic rods 32 are fixed to the door lock constraint fixing seat 31 by bolts. The door lock constraint Y-direction telescopic rods 33 are fixed to the door lock constraint X-direction telescopic rods 32 and the position of the door lock constraint Y-direction telescopic rods 33 is adjusted so that the door lock position is achieved. The round rod fixing clamp installed on the door lock passes through the through hole in the arc side plate of the door lock constraint clamp 34 and then passes into the fish eye bearing at the front end of the door lock constraint Y-direction telescopic rods 33, thereby completing the constraint of the six degrees of freedom of the door lock. The loading cylinder is used to load standard force on the top and middle point of the window frame. The deformation of the window frame is measured on the opposite side of the window frame. This is the constraint test scheme of the lateral stiffness of window frame.

[0058] Category three: windshield lower belt line stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, armrest support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness

[0059] The same constraint scheme is adopted for the same constraint conditions of the eight kinds of door stiffness, i.e. the upper and lower hinge constraints of six degrees of freedom and the door lock constraints of six degrees of freedom. The left hinge constraint tooling assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges, i.e. the hinge constraint fixing seat 21 of the left hinge constraint tooling assembly 2 is installed on the left side of the gantry frame 1, the position of the hinge constraint fixing seat 21 in the Z direction and the distance between the two hinge constraint fixing seats 21 are adjusted so as to reach the hinge installation distance and the installation height distance from the ground; the hinge constraint X-direction telescopic rod 22 is installed, the hinge constraint X-direction telescopic rod 22 is fixed to the hinge constraint fixing seat 21 by means of bolts, the hinge constraint Y-direction telescopic rod 23 is installed at the top end of the hinge constraint X-direction telescopic rod 22 by means of bolts, and the extension distance of the hinge constraint Y-direction telescopic rod 23 is adjusted so as to reach the distance standard of no interference with the gantry frame 1 when the force loading cylinder loads the hinge fixing point; the right door lock constraint tooling assembly 3 is used to constrain the six degrees of freedom of the door lock, i.e. the door lock constraint fixing seat 31 of the right door lock constraint tooling assembly 3 is installed on the right side of the gantry frame 1, the height of the right door lock constraint tooling assembly 3 is adjusted to the door lock installation position, the door lock constraint X-direction telescopic rod 32 is fixed to the door lock constraint fixing seat 31 by means of bolts, the door lock constraint Y-direction telescopic rod 33 is fixed to the door lock constraint X-direction telescopic rod 32 and the position of the door lock constraint Y-direction telescopic rod 33 is adjusted so as to reach the door lock position, and the fixing clamp at the front end of the door lock constraint Y-direction telescopic rod 33 is fixed by means of bolts. During the door lock fixing process, the door lock installation surface has an angle, so the angle adjustment is completed through the connection between the door lock constraint Y-direction telescopic rod 33 and the second disc 36 at the top end of the door lock constraint X-direction telescopic rod 32 to constrain the six degrees of freedom of the door lock. The loading cylinder is used to load the points or holes to be measured, and the displacement sensors are used to measure the deformation of each measured point or hole.

[0060] Category four: hinge fixing point stiffness, outer plate surface stiffness, door lock fixing point stiffness category

[0061] The application is applied to the hinge fixed point stiffness, the outer plate surface stiffness, the door lock fixed point stiffness; the constraint conditions of the above three working conditions are different, but the overall constraint is similar. The outer plate surface stiffness constraint condition is that the upper and lower hinges of the vehicle door constrain six degrees of freedom, the door lock constrains six degrees of freedom, and the lower end of the vehicle door constrains six degrees of freedom; the hinge fixed point stiffness is to remove one of the hinges and measure the stiffness of the fixed point, and the other constraint conditions are the same as those of the outer plate surface stiffness constraint condition; the door lock fixed point stiffness is to release the constraint at the door lock and release the constraint at the lower edge of the hinge side; the gantry frame 1 and the left hinge constraint tool assembly 2 are used to achieve the constraint requirement, the six degrees of freedom of the upper and lower hinges are constrained by the left hinge constraint tool assembly 2: the hinge constraint fixed seat 21 of the left hinge constraint tool assembly 2 is installed on the left side of the gantry frame, the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted, so that the hinge installation distance and the distance from the ground installation height are reached; the upper and lower hinge constraint X-direction telescopic rods 22 are installed, the hinge constraint X-direction telescopic rods 22 are fixed to the hinge constraint fixed seat 21 by bolts, the upper and lower hinge constraint Y-direction telescopic rods 23 are installed at the top of the hinge constraint X-direction telescopic rods 22 by bolts, and the distance of the hinge constraint Y-direction telescopic rod 23 installation surface extending out is adjusted to reach the distance standard that the force loading cylinder does not interfere with the gantry frame when loading the hinge fixed point; the right door lock constraint tool assembly 3 is used to constrain six degrees of freedom of the door lock: the right door lock fixed seat 31 of the right door lock constraint tool assembly 3 is installed on the right side of the gantry frame 1, the height of the right door lock constraint tool assembly 3 is adjusted to the door lock installation position, the door lock constraint X-direction telescopic rod 32 is fixed to the right door lock fixed seat 31 by bolts, the door lock constraint Y-direction telescopic rod 33 is fixed to the door lock constraint X-direction telescopic rod 32 and the position of the door lock constraint Y-direction telescopic rod 33 is adjusted, so that the door lock position is reached, the fixing clamp at the top of the door lock constraint Y-direction telescopic rod 33 is fixed by bolts, and during the door lock fixing process, since the door lock installation surface has an angle, the six degrees of freedom of the door lock are constrained by the angle adjustment of the second disc 36 at the top of the door lock constraint Y-direction telescopic rod 33 and the door lock constraint X-direction telescopic rod 32, the installation surface of the door lock constraint Y-direction telescopic rod 33 and the door lock constraint clamp 34; the door lower edge fixed seat 51 of the lower door lower edge constraint tool assembly 5 is installed on the lower side of the gantry frame 1, the position of the door lower edge Z-direction telescopic rod 52 is adjusted and fixed to the door lower edge fixed seat 51 by bolts, the door lower edge Y-direction telescopic rod 53 is fixed to the top of the door lower edge Z-direction telescopic rod 52 by bolts, the door lower edge clamp is fixed to the top of the door lower edge Y-direction telescopic rod by bolts, the two ends of the vehicle door lower edge are clamped by the door lower edge constraint clamp 54, and then the six degrees of freedom of the lower edge are constrained; since the vehicle door lower edge usually has an angle in the X direction and the Z direction during installation, the seventh disc 56 on the door lower edge Z-direction telescopic rod 52 and the door lower edge Y-direction telescopic rod 53, the eighth disc 57 on the door lower edge Y-direction telescopic rod 53 and the ninth disc 58 under the door lower edge constraint clamp 54 are used for angle adjustment.The loading cylinder is used to load the points or holes to be measured, and the displacement sensor is used to measure the deformation of each measured point or hole; the loading cylinder is used to load the points, surfaces or holes to be measured, which is a constraint test scheme for hinge fixed point stiffness, outer plate surface stiffness and door lock fixed point stiffness.

[0062] Category five: special category - sliding door inner plate fixed point stiffness category

[0063] It belongs to the special case classification, that is, only for the constraint of sliding door inner plate fixed point test; In the sliding door inner plate fixed point test, the upper and lower hinges need to be constrained six degrees of freedom, the door lock needs to be constrained six degrees of freedom, the lower edge of the door needs to be constrained six degrees of freedom at both ends, and the window frame needs to be constrained six degrees of freedom at both ends; The gantry frame 1 and the left hinge constraint tooling assembly 2 are used to achieve the constraint requirement, the left hinge constraint tooling assembly 2 is used to constrain the six degrees of freedom of the upper and lower hinges: the hinge constraint fixed seat 21 of the left hinge constraint tooling assembly 2 is installed on the left side of the gantry frame 1, the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted, so that the hinge installation spacing and the distance from the ground installation height are achieved; The hinge constraint X direction telescopic rod 22 is installed, the hinge constraint X direction telescopic rod 22 is fixed with the hinge constraint fixed seat 21 by bolts, the upper and lower hinge constraint Y direction telescopic rod 23 is installed at the top of the hinge constraint X direction telescopic rod 22 by bolts, and the extension distance of the hinge constraint Y direction telescopic rod 23 installation surface is adjusted to reach the distance standard that the force loading cylinder does not interfere with the gantry frame 1 when loading the hinge fixed point; The right door lock constraint tooling assembly 3 is used to constrain the six degrees of freedom of the door lock: the door lock constraint fixed seat 31 of the right door lock constraint tooling assembly 3 is installed on the right side of the gantry frame 1, the height of the right door lock constraint tooling assembly 3 is adjusted to the door lock installation position, the door lock constraint X direction telescopic rod 32 is fixed on the door lock constraint fixed seat 31 by bolts, the door lock constraint Y direction telescopic rod 33 is fixed on the door lock constraint X direction telescopic rod 32 and the position of the door lock constraint Y direction telescopic rod 33 is adjusted, so that the door lock position is reached, the fixing clamp at the top of the door lock constraint Y direction telescopic rod 33 is fixed by bolts, and the door lock installation surface has an angle during the door lock fixing process, so the third disc 37 on the door lock constraint Y direction telescopic rod 33 and the second disc 36 on the left top surface of the door lock constraint X direction telescopic rod 32, the arc side plate on the door lock constraint clamp 34 and the third disc 37 at the rear end of the door lock constraint clamp 34 are used for angle adjustment to complete the constraint of the six degrees of freedom of the door lock; The door lower edge fixed seat 51 of the lower door lower edge constraint tooling assembly 5 is installed on the lower side of the gantry frame, the position of the door lower edge Z direction telescopic rod 52 is adjusted and fixed on the door lower edge fixed seat 51 by bolts, the door lower edge Y direction telescopic rod 53 is fixed on the top of the door lower edge Z direction telescopic rod 52 by bolts, the door lower edge constraint clamp 54 is fixed on the top of the door lower edge Y direction telescopic rod 53 by bolts, and the two ends of the door lower edge are clamped and constrained to constrain the six degrees of freedom of the lower edge through the door lower edge constraint clamp 54; Since the door lower edge usually has an angle in the X direction and the Z direction during installation, the seventh disc 56 on the door lower edge Z direction telescopic rod 52 and the door lower edge Y direction telescopic rod 53, the eighth disc 57 on the door lower edge Y direction telescopic rod 53 and the ninth disc 58 under the door lower edge constraint clamp 54 are used for angle adjustment.The window frame constraint fixing seat 41 of the upper side window frame constraint tool assembly 4 is installed on the upper side of the gantry frame 1, the position of the window frame constraint Y-direction telescopic rod 42 is adjusted and fixed on the window frame constraint fixing seat 41 by bolts, the window frame constraint Z-direction telescopic rod 43 is fixed on the top end of the window frame constraint Y-direction telescopic rod 42 by bolts, the window frame upper edge constraint clamp 44 is fixed on the top end of the window frame constraint Z-direction telescopic rod 43 by bolts, the two ends of the upper edge of the vehicle door window frame are clamped by the window frame upper edge constraint clamp 44 to constrain the six degrees of freedom of the upper edge; since the upper edge of the vehicle door window frame usually has an angle in the X-direction and the Z-direction during installation, the angle is adjusted by the fourth disc 46 on the window frame constraint Y-direction telescopic rod 42, the fifth disc 47 on the window frame constraint Z-direction telescopic rod 43 and the sixth disc 48 on the window frame upper edge constraint clamp 44; the holes to be measured are loaded by the loading cylinder, and the deformation of each measured hole is measured by the displacement sensor; this is the constraint test scheme of the sliding door inner panel fixing point stiffness.

[0064] Example 2

[0065] 1. Functional composition of the scheme

[0066] The same door stiffness test is divided into 13 test conditions in the test process, which are: door vertical stiffness, window frame lateral stiffness, windshield lower belt line stiffness, rearview mirror fixing point stiffness, limiter fixing point stiffness, glass lifter fixing point stiffness, armrest support fixing point stiffness, inner pull handle fixing point stiffness, inner handle fixing point stiffness, outer handle fixing point stiffness, hinge fixing point stiffness, outer panel surface stiffness, and door lock fixing point stiffness.

[0067] This method divides the 13 conditions into five test constraint categories according to the different constraint methods, which are: door vertical stiffness category; window frame lateral stiffness category; windshield lower belt line stiffness, rearview mirror fixing point stiffness, limiter fixing point stiffness, glass lifter fixing point stiffness, armrest support fixing point stiffness, inner pull handle fixing point stiffness, inner handle fixing point stiffness, outer handle fixing point stiffness category; hinge fixing point stiffness, outer panel surface stiffness, and door lock fixing point stiffness category; special category - sliding door inner panel fixing point stiffness category. The stiffness values of different types of door stiffness test conditions can be measured by one of the five categories.

[0068] First, the design of the constraint part of the test method:

[0069] The restraint part in the door stiffness restraint test method is divided into two parts: the first part is designed as a gantry frame, which is used to achieve the vertical restraint state of the door in the test process, and is used as the overall restraint frame of the door stiffness test; the second part is to provide an installation position for the door fixing clamp, to ensure that all door fixing clamps can be quickly installed and adjusted based on the gantry frame; the third part is to ensure that the door is finally restrained on the same carrier for easy movement. The second part is the door restraint device, which is divided into four different functional tool assemblies, including the left hinge restraint tool assembly, the right door lock restraint tool assembly, the upper window frame restraint tool assembly, and the lower door edge restraint tool assembly. Different tool assemblies need to achieve different position restraint functions, so different functional tools need to be designed according to the specific shape and restraint method of the restrained part of the door. The design requirements of each part are introduced as follows.

[0070] 2. Restraint part composition principle

[0071] Gantry frame design scheme: The function of the gantry frame is to integrate all the door restraint clamps into a whole, and to ensure that it has sufficient strength to meet the test requirements and sufficient space size to restrain the door. Therefore, the left and right sides of the gantry frame can be designed as column structures with sufficient strength, the bottom is a fixed base, and the upper and lower sides are I-shaped upper and lower beams. The strength of the beam needs to meet the test requirements, and uniform distribution of fixing bolt holes needs to be processed on the installation surface of the column and the beam for installing the door restraint clamps.

[0072] Left hinge restraint tool design scheme: The hinge side usually appears in the full restraint of the upper and lower hinges, or only one hinge is fully restrained in the test. At the same time, the hinge side requires stiffness tests of the hinge fixing point and the limiter fixing point. Therefore, the clamp design method is as follows: 1. The upper and lower hinges can be individually restrained; 2. The Z-direction can be adjusted by the clamp and the installation surface of the column due to the different distances between the hinges of various models of doors; 3. The X-direction can be adjusted to ensure its versatility due to the different sizes of doors; 4. The Y-direction can be adjusted to avoid interference with the test loading cylinder due to the side location of the hinge fixing point and the limiter fixing point. Finally, the left hinge restraint tool style needs to meet the requirements of adjustment in the X / Y / Z directions and the strength required by the stiffness test.

[0073] Right door lock constraint fixture design scheme: the door lock side usually appears three constraint states in the test, that is, full constraint, no constraint, and constraint 12345. At the same time, the door lock needs to be fixed at the door lock fixed point for stiffness test. Based on the above requirements, the fixture design scheme of the door lock side needs to meet the following conditions: one, in order to realize full constraint of the door lock, the X / Z two-axis direction needs to be angle-adjustable due to the angle of the door lock mounting surface; two, in order to realize the loading test of the door lock fixed point, the fixture needs to be adjustable in the Y direction to prevent the interference of the gantry frame to the loading device; three, in order to ensure the universality, the X direction needs to be adjustable due to the different sizes of the door; four, the Z direction needs to be adjustable through the gantry frame and the fixed seat due to the different heights of the door lock; five, in order to ensure the full constraint and the X rotation state of the single release, the replaceable rotary hole chuck needs to be designed. In summary, the door lock side constraint fixture needs to meet the X / Z axis angle adjustment and the X / Y / Z direction adjustment function.

[0074] Upper side window frame constraint fixture design scheme: the window frame side has two states of full constraint and no constraint at the upper end in the test condition. In order to realize the two states, the scheme design is as follows: one, the fixture is designed to be rotatable in the X / Z two-axis direction due to the angle of the upper end of the door; two, the fixture is adjustable in the X / Y / Z three directions due to the different sizes of the door, causing different installation positions.

[0075] Lower side door lower edge constraint fixture design scheme: the door lower edge also has two states of no constraint and full constraint at both ends in the test process. Since the shape and clamping state of the door lower edge are similar to those of the window frame, the design scheme of the door lower edge fixture is also adjustable in the X / Z axis angle and adjustable in the X / Y / Z direction.

[0076] Specifically as follows:

[0077] Gantry frame 1: the column of the gantry frame 1 is welded by 20 thick steel plate to ensure sufficient strength; the base 11 is made of 40 mm thick steel plate to ensure that the base 11 will not be deformed during welding and ensure stable installation with the iron floor. One side is a mounting surface, and M12 threaded holes with a spacing of 100 mm are processed on the mounting surface in the up-down direction, which is convenient for fixture installation and Z direction movement of the fixture. The height is designed to be 2.6 meters, which ensures the universality of the fixture for clamping the door. The upper and lower are 20 mm thick steel plates welded into an I-shaped beam. Two rows of M12 fixture installation holes with a spacing of 50 mm are processed on the lower bottom surface of the upper beam 13. The lower beam 14 is installed in an inverted I-shaped manner, and M12 threaded installation holes with a spacing of 50 mm are processed on the outer side surface. The two sides of the beam are welded into 20 mm thick connecting steel plates, which are connected with the column 12 by hole connection, as shown in Figure 1 .

[0078] The left hinge constraint tool assembly 2: the hinge constraint tool assembly is composed of three parts of hinge constraint fixing seat 21, hinge constraint X-direction telescopic rod 22 and hinge constraint Y-direction telescopic rod 23. The hinge constraint fixing seat 21 adopts 20mm thick steel plate, and a long hole is processed on the hinge constraint fixing seat 21 and the column 12 of the gantry frame 1 is connected by M12 bolt, the hinge constraint fixing seat 21 can be adjusted in position on the column 12 of the gantry frame 1 in Z direction; the first base square groove 24 with a square inner diameter of 40mmX40mm and a length of 120mm is welded by 15mm thick steel plate, and two or more M12 threaded holes are processed on the groove upper end face. The hinge constraint X-direction telescopic rod 22 is steel material with a size of 40mmX40mm and a length of 500mm, a first disc 25 with a thickness of 15mm and a diameter of 100mm is welded on one end side face of the hinge constraint X-direction telescopic rod 22, and a long hole with a radius R40 and a width of 11mm is processed on the first disc 25. The hinge constraint X-direction telescopic rod 22 is inserted into the first base square groove 24, and the length can be adjusted in X direction, and the hinge constraint X-direction telescopic rod 22 is positioned by the threaded hole on the top of the base square groove 24 by bolt. The hinge constraint Y-direction telescopic rod 23 is also steel material with a size of 40mmX40mm and a length of 500mm, and a hinge constraint L-shaped mounting plate 26 is welded on the top end of the hinge constraint Y-direction telescopic rod 23, and the other side is processed into a long hole distributed horizontally and vertically for installing a hinge. A long hole with a width of 13mm is processed on one side of the hinge constraint Y-direction telescopic rod 23, which is used for connecting the first disc 25 on the top end of the hinge constraint X-direction telescopic rod 22 by bolt and adjusting the position in Y direction.

[0079] The right door lock constraint tool assembly 3 is composed of a door lock constraint fixing seat 31, a door lock constraint X-direction telescopic rod 32, a door lock constraint Y-direction telescopic rod 33, and a door lock constraint clamp 34. The door lock constraint fixing seat 31 is made of a 20mm-thick steel plate, and a long slot is processed on the steel plate and connected with the column 12 of the gantry frame 1 by M12 bolts. The door lock constraint fixing seat 31 can be adjusted in position in the Z direction on the column 12 of the gantry frame 1. A second base square groove 35 with an inner diameter of 40mmX40mm and a length of 120mm is welded on the door lock constraint fixing seat 31 by a 15mm-thick steel plate, and two or more M12 threaded holes are processed on the upper end face of the groove. The door lock constraint X-direction telescopic rod 32 is made of a 40mmX40mm steel material with a length of 500mm, and a second disc 36 with a thickness of 15mm and a diameter of 100mm is welded on one side of the door lock constraint X-direction telescopic rod 32. A long slot with a radius R40 and a width of 11mm is processed on the second disc 36. The door lock constraint X-direction telescopic rod 32 is inserted into the second base square groove 35, and the second disc 36 is welded on the front end to face upward, so that the length can be adjusted in the X direction, and the position is fixed by the threaded holes on the top of the second base square groove 35 by bolts. The door lock constraint Y-direction telescopic rod 33 is also made of a 40mmX40mm steel material with a length of 500mm, and a third disc 37 with a thickness of 15mm and a diameter of 100mm is welded on the top end. A long slot with a radius R40 and a width of 11mm is processed on the third disc 37. A long slot with a width of 13mm is processed on one side of the door lock constraint Y-direction telescopic rod 33, which is used for connecting the second disc 36 on the top end of the door lock constraint X-direction telescopic rod 32 by bolts and adjusting the position in the Y direction and the angle around the Z axis. The door lock constraint clamp 34 is L-shaped, one end of which is processed into a fourth disc 38 with a thickness of 15mm and a diameter of 100mm, and a long slot with a radius R40 and a width of 11mm is processed on the fourth disc 38. The fourth disc 38 is connected with the third disc 37 on the top end of the door lock constraint Y-direction telescopic rod 33, and can be adjusted in the angle around the Y axis. The third disc 37 is provided with a fish-eye bearing. The other end of the door lock constraint clamp 34 is processed into horizontal and vertical long slots, which are used for connecting and fixing with the door lock mounting hole.

[0080] The upper side window frame constraint tool assembly 4: the window frame constraint tool assembly is composed of four parts of a window frame constraint fixed seat 41, a window frame constraint Y-direction telescopic rod 42, a window frame constraint Z-direction telescopic rod 43, and a window frame upper edge constraint clamp 44. The window frame constraint fixed seat 41 is made of a 20mm-thick steel plate, and a long slot is processed on the upper surface and connected with the gantry frame cross beam by M12 bolts. The window frame constraint fixed seat 41 can be adjusted in position on the gantry frame cross beam in the X direction. A third base square groove 45 with a square inner diameter of 40mmX40mm and a length of 120mm is welded on the upper surface by a 15mm-thick steel plate, and two or more M12 threaded holes are processed on the upper end surface of the groove. The window frame constraint Y-direction telescopic rod 42 is made of a steel material with a length of 500mm, a 40mmX40mm size, and a fourth disc 46 with a thickness of 15mm and a diameter of 100mm welded on one side surface. The fourth disc 46 is processed with a long slot with a radius R40 and a width of 11mm. The window frame constraint Y-direction telescopic rod 42 is inserted into the third base square groove 45, and the fourth disc 46 welded on the front end is connected to be installed forward or backward, so that the length can be adjusted in the Y direction, and the position is fixed by the threaded holes on the top of the third base square groove 45 by using bolts. The window frame constraint Z-direction telescopic rod 43 is also made of a steel material with a length of 500mm, a 40mmX40mm size, and a fifth disc 47 with a thickness of 15mm and a diameter of 100mm welded on the top. The fifth disc 47 is processed with a long slot with a radius R40 and a width of 11mm. A long slot with a width of 13mm is processed on one side of the window frame constraint Z-direction telescopic rod 43, which is used for bolt connection with the fourth disc 46 at the top of the window frame constraint Y-direction telescopic rod 42, Z-direction position adjustment, and X-axis angle adjustment. The window frame constraint clamp 44 is processed into a sixth disc 48 with a thickness of 15mm and a diameter of 100mm at the bottom, and a long slot with a radius R40 and a width of 11mm is processed on the sixth disc 48. The sixth disc 48 is connected with the fifth disc 47 at the top of the window frame constraint Z-direction telescopic rod 43, and can be adjusted in angle around the Z axis. The other end is processed into a long strip plate with a thickness of 15mm, a 50mmX100mm size, and four M12 threaded holes uniformly processed on the plate, which is used for clamping and constraining the upper window frame edge.

[0081] Lower side door lower edge restraint tooling assembly 5: the door lower edge restraint tooling assembly is composed of four parts, including a door lower edge fixing seat 51, a door lower edge Z-direction telescopic rod 52, a door lower edge Y-direction telescopic rod 53, and a door lower edge restraint clamp 54. The door lower edge fixing seat 51 is made of a 20mm-thick steel plate, and a long slot is processed on the steel plate and connected to the cross beam of the gantry frame by M12 bolts. The door lower edge fixing seat 51 can be adjusted in position on the cross beam of the gantry frame in the X direction. A fourth base square groove 55 with an inner diameter of 40mmX40mm and a length of 120mm is welded on the upper surface of the door lower edge fixing seat 51 by a 15mm-thick steel plate. Two or more M12 threaded holes are processed on the upper end surface of the groove. The door lower edge Z-direction telescopic rod 52 is made of a steel material with a length of 500mm, a width of 40mm, and a height of 40mm. A seventh disc 56 with a thickness of 15mm and a diameter of 100mm is welded on one side of the door lower edge Z-direction telescopic rod 52. A long slot with a radius R40 and a width of 11mm is processed on the seventh disc 56. The door lower edge Z-direction telescopic rod 52 is inserted into the fourth base square groove 55, and the front end of the door lower edge Z-direction telescopic rod 52 is welded to the seventh disc 56. The door lower edge Z-direction telescopic rod 52 can be adjusted in length in the Z direction, and is positioned by being screwed and clamped through the threaded holes on the top of the fourth base square groove 55. The door lower edge Y-direction telescopic rod 53 is also made of a steel material with a length of 500mm, a width of 40mm, and a height of 40mm. An eighth disc 57 with a thickness of 15mm and a diameter of 100mm is welded on one side of the door lower edge Y-direction telescopic rod 53. A long slot with a radius R40 and a width of 11mm is processed on the eighth disc 57. The eighth disc 57 is installed with the face upward. A long slot with a width of 13mm is processed on one side of the door lower edge Y-direction telescopic rod 53, which is used for connecting the seventh disc 56 at the top end of the door lower edge Z-direction telescopic rod 52 by bolts and adjusting the position in the Y direction and the angle around the Z axis. The bottom end of the door lower edge restraint clamp 54 is processed into a ninth disc 58 with a thickness of 15mm and a diameter of 100mm. A long slot with a radius R40 and a width of 11mm is processed on the ninth disc 58. The ninth disc 58 is connected to the eighth disc 57 at the top end of the door lower edge Y-direction telescopic rod 53, and can be adjusted in the angle around the Z axis. The other end of the door lower edge restraint clamp 54 is processed into a long strip plate with a thickness of 15mm, a width of 50mm, and a length of 100mm. Four M12 threaded holes are uniformly processed on the plate, which are used for clamping and restraining the door lower edge.

[0082] Note: The degrees of freedom 123456 are X, Y, Z, X rotation, Y rotation, and Z rotation, respectively.

[0083] The five test classifications are realized through the cooperation between the assemblies of the above-mentioned restraint parts and the test process. Finally, the tests on the whole door in 13 different working conditions are completed, so as to form a unified overall test restraint method.

[0084] Category one: applied to the vertical stiffness of the door, the vertical stiffness of the door is to constrain the door hinge, and the downward force is applied at the door lock under the closed state of the door to measure the deformation of the door. The gantry frame 1 and the left hinge constraint tooling assembly 2 are used to achieve the constraint requirement, and the left hinge constraint tooling assembly 2 is used to constrain the 123456 degrees of freedom of the upper and lower hinges. The upper and lower hinge constraint fixed seat 21 is installed on the left side of the gantry frame 1, the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted, so that the hinge installation distance and the distance from the ground installation height are reached. The upper and lower hinge constraint X direction telescopic rod 22 is installed, the hinge constraint X direction telescopic rod 22 is fixed with the hinge constraint fixed seat 21 by bolts, the upper and lower hinge constraint Y direction telescopic rod 23 is installed at the top end of the hinge constraint X direction telescopic rod 22 by bolts, and the installation surface of the hinge constraint Y direction telescopic rod 23 extends to a distance that does not interfere with the gantry frame 1 when the force loading cylinder loads at the hinge fixed point. Finally, the upper and lower hinges of the door are connected with the top end of the hinge constraint Y direction telescopic rod 23 by bolts. The downward load is loaded at the door lock by the loading cylinder, and the displacement sensor is used to measure the subsidence at the door lock, and finally the vertical stiffness value of the door is calculated. This is the constraint test scheme of the vertical stiffness of the door.

[0085] Category two: applied to the window frame lateral stiffness, the window frame lateral stiffness is the full constraint of the door hinge, the full constraint of the door lock, the door is closed, the lateral force is applied to the top of the window frame and the midpoint of the window frame to measure the deformation of the door window frame. The gantry frame 1 and the left hinge constraint tooling assembly 2 are used to achieve the constraint requirement, and the left hinge constraint tooling assembly 2 is used to constrain the 123456 degrees of freedom on the upper and lower hinges. The hinge constraint fixed seat 21 is installed on the left side of the gantry frame 1, the position of the hinge constraint fixed seat 21 in Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted, so that the hinge installation distance and the distance from the ground installation height are reached. The upper and lower hinge constraint X direction telescopic rod 22 is installed, the hinge constraint X direction telescopic rod 22 is fixed with the hinge constraint fixed seat 21 by bolts, the upper and lower hinge constraint Y direction telescopic rod 23 is installed on the hinge constraint X direction telescopic rod 22 by bolts, and the installation surface of the hinge constraint Y direction telescopic rod 23 is extended to a distance standard that does not interfere with the gantry frame 1 when the force loading cylinder loads on the hinge fixed point. The right door lock constraint tooling assembly 3 is used to constrain the 12356 degrees of freedom of the door lock. The door lock constraint fixed seat 31 is installed on the right side of the gantry frame 1, the height is adjusted to the door lock installation position, the door lock constraint X direction telescopic rod 32 is fixed on the door lock constraint fixed seat 31 by bolts, the door lock constraint Y direction telescopic rod 33 is fixed on the door lock constraint X direction telescopic rod 32 and the position of the door lock constraint Y direction telescopic rod 33 is adjusted, so that the door lock position is reached, the round rod fixed clamp installed on the door lock is inserted into the fish eye bearing at the top end of the door lock constraint Y direction telescopic rod 33, and the constraint of the 12356 degrees of freedom of the door lock is completed. The loading cylinder is used to load the standard force on the top and midpoint of the window frame respectively, and the deformation of the window frame is measured on the opposite side of the window frame. This is the constraint test scheme of the window frame lateral stiffness.

[0086] Category three: applied to the wind window under the belt line stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, handrail support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, outer handle fixed point stiffness, because the above eight kinds of door stiffness working condition constraints are the same, so the same kind of constraint scheme is adopted. This eight kinds of working condition are constrained when the upper and lower hinges are constrained 123456 degrees of freedom, and the door lock is constrained 123456 degrees of freedom. The gantry frame 1 and the left hinge constraint tooling assembly 2 are used to achieve the constraint requirement, and the left hinge constraint tooling assembly 2 is used to constrain the 123456 degrees of freedom of the upper and lower hinge side. The hinge constraint fixed seat 21 is installed on the left side of the gantry frame 1, the position of the hinge constraint fixed seat 21 in Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted, so that the hinge installation spacing and the installation height distance from the ground are reached. The hinge constraint X direction telescopic rod 22 is installed, the hinge constraint X direction telescopic rod 22 is fixed with the hinge constraint fixed seat 21 by bolts, the hinge constraint Y direction telescopic rod 23 is installed at the top of the hinge constraint X direction telescopic rod 22 by bolts, and the installation surface of the hinge constraint Y direction telescopic rod 23 extends to a distance that does not interfere with the gantry frame 1 when the force loading cylinder loads the hinge fixed point. The right door lock constraint tooling assembly 3 is used to constrain the 123546 degrees of freedom of the door lock. The door lock constraint fixed seat 31 is installed on the right side of the gantry frame 1, the height is adjusted to the door lock installation position, the door lock constraint X direction telescopic rod 32 is fixed on the door lock constraint fixed seat 31 by bolts, the door lock constraint Y direction telescopic rod 33 is fixed on the door lock constraint X direction telescopic rod 32 and the position of the door lock constraint Y direction telescopic rod 33 is adjusted, so that the door lock position is reached, the fixed clamp at the top of the door lock constraint Y direction telescopic rod 33 is fixed by bolts, and during the door lock fixing process, because the door lock installation surface has an angle, the angle adjustment can be completed by the connection and fixing part at the top of the door lock constraint Y direction telescopic rod 33 and the door lock constraint X direction telescopic rod 32 to constrain the 123456 degrees of freedom of the door lock. The loading cylinder is used to load the points or holes to be measured, and the displacement sensor is used to measure the deformation of each measured point or hole. This is the constraint test scheme of the wind window under the belt line stiffness, rearview mirror fixed point stiffness, limiter fixed point stiffness, glass lifter fixed point stiffness, handrail support fixed point stiffness, inner pull handle fixed point stiffness, inner handle fixed point stiffness, and outer handle fixed point stiffness.

[0087] Category four: applied to hinge fixed point stiffness, outer plate surface stiffness, door lock fixed point stiffness. The constraint conditions of the above three working conditions are different, but the overall constraint is similar. The outer plate surface stiffness constraint condition is: the upper and lower hinges of the vehicle door constrain 123456 degrees of freedom, the door lock constrains 123456 degrees of freedom, and the lower end of the vehicle door constrains 123456 degrees of freedom. The hinge fixed point stiffness is to remove one of the hinges and measure the stiffness of its fixed point, and the other constraint conditions are the same as those of the outer plate surface stiffness. The door lock fixed point stiffness is to release the constraint at the door lock and release the constraint at the lower edge of the hinge side. The gantry frame 1 and the left hinge constraint tooling assembly 2 are used to achieve the constraint requirement, and the left hinge constraint tooling assembly 2 is used to constrain the 123456 degrees of freedom of the upper and lower hinges. The hinge constraint fixed seat 21 is installed on the left side of the gantry frame 1, and the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two hinge constraint fixed seats 21 are adjusted to achieve the hinge installation spacing and the distance from the ground installation height. The upper and lower hinge constraint X-direction telescopic rod 22 is installed, the hinge constraint X-direction telescopic rod 22 is fixed to the hinge constraint fixed seat 21 by bolts, and the upper and lower hinge constraint Y-direction telescopic rod 23 is installed at the top of the hinge constraint X-direction telescopic rod 22 by bolts. The installation surface of the hinge constraint Y-direction telescopic rod 23 extends to a distance that does not interfere with the gantry frame 1 when the force loading cylinder loads the hinge fixed point. The right door lock constraint tooling assembly 3 is used to constrain the 123546 degrees of freedom of the door lock. The door lock constraint fixed seat 31 is installed on the right side of the gantry frame 1, and the height is adjusted to the door lock installation position. The door lock constraint X-direction telescopic rod 32 is fixed to the door lock constraint fixed seat 31 by bolts, and the door lock constraint Y-direction telescopic rod 33 is fixed to the door lock constraint X-direction telescopic rod 32 and the position of the door lock constraint Y-direction telescopic rod 33 is adjusted to achieve the door lock position. The fixed clamp at the top of the door lock constraint Y-direction telescopic rod 33 is fixed by bolts. During the door lock fixing process, since the door lock installation surface has an angle, the angle adjustment of the door lock constraint Y-direction telescopic rod 33 and the installation surface of the door lock constraint X-direction telescopic rod 32, and the installation surface of the door lock constraint X-direction telescopic rod 32 and the door lock clamp can complete the constraint of the 123456 degrees of freedom of the door lock. The door lower edge fixed seat 51 is installed on the lower side of the gantry frame 1, the position of the door lower edge Z-direction telescopic rod 52 is adjusted and fixed to the door lower edge fixed seat 51 by bolts, the door lower edge Y-direction telescopic rod 53 is fixed to the top of the door lower edge Z-direction telescopic rod 52 by bolts, and the door lower edge clamp is fixed to the top of the door lower edge Y-direction telescopic rod 53 by bolts. The two ends of the vehicle door lower edge are clamped and constrained by the door lower edge clamp to constrain the lower edge degrees of freedom 123456. Since the vehicle door lower edge usually has an angle in the X and Z directions during installation, the angle adjustment of the installation surface of the door lower edge Z-direction telescopic rod 52 and the door lower edge Y-direction telescopic rod 53, and the installation surface of the door lower edge Y-direction telescopic rod 53 and the door lower edge clamp can be used. The loading cylinder is used to load the points or holes to be measured, and the displacement sensor is used to measure the deformation of each measured point or hole.The loading cylinder is used to load the point, surface or hole to be measured, which is the constraint test scheme of the hinge fixing point stiffness, the outer plate surface stiffness and the door lock fixing point stiffness.

[0088] Category five: belongs to the special case category, that is, only for the sliding door inner plate fixed point test constraints. In the sliding door inner plate fixed point test, the upper and lower hinges need to be constrained 123456 degrees of freedom, the door lock needs to be constrained 123456 degrees of freedom, the lower edge of the door needs to be constrained 123456 degrees of freedom, and the upper edge of the window frame needs to be constrained 123456 degrees of freedom. Use the gantry frame 1 and the left hinge constraint tooling assembly 2 to achieve the constraint requirement, and use the left hinge constraint tooling assembly 2 to constrain the 123456 degrees of freedom of the upper and lower hinge sides. Install the hinge constraint fixed seat 21 on the left side of the gantry frame 1, adjust the position of the hinge constraint fixed seat 21 in the Z direction and the distance between the two bases, so that it reaches the hinge installation spacing and the installation height distance from the ground. Install the hinge constraint X-direction telescopic rod 22, fix the hinge constraint X-direction telescopic rod 22 with the hinge constraint fixed seat 21 with bolts, and install the hinge constraint Y-direction telescopic rod 23 on the top end of the hinge constraint X-direction telescopic rod 22 with bolts. The installation surface of the hinge constraint Y-direction telescopic rod 23 extends to a distance that does not interfere with the gantry frame 1 when the force loading cylinder loads on the hinge fixed point. Use the right door lock constraint tooling assembly 3 to constrain the 123546 degrees of freedom of the door lock. Install the door lock constraint fixed seat 31 on the right side of the gantry frame 1, adjust the height to the door lock installation position, fix the door lock constraint X-direction telescopic rod 32 on the door lock constraint fixed seat 31 with bolts, fix the door lock constraint Y-direction telescopic rod 33 on the door lock constraint X-direction telescopic rod 32 and adjust the position of the door lock constraint Y-direction telescopic rod 33, so that it reaches the door lock position. Fix the clamp at the top end of the door lock constraint Y-direction telescopic rod 33 with bolts. During the door lock fixing process, since the door lock installation surface has an angle, the 123456 degrees of freedom of the door lock can be constrained by adjusting the angles of the installation surfaces of the door lock constraint Y-direction telescopic rod 33 and the door lock constraint X-direction telescopic rod 32, the door lock constraint X-direction telescopic rod 32 and the door lock clamp installation surface. The door lower edge fixed seat 51 is installed on the lower side of the gantry frame 1, the position of the door lower edge Z-direction telescopic rod 52 is adjusted and fixed on the door lower edge fixed seat 51 with bolts, the door lower edge Y-direction telescopic rod 53 is fixed on the top end of the door lower edge Z-direction telescopic rod 52 with bolts, and the door lower edge clamp is fixed on the top end of the door lower edge Y-direction telescopic rod 53 with bolts. The two ends of the lower edge of the vehicle door are clamped and constrained by the door lower edge clamp to constrain the 123456 degrees of freedom of the lower edge. Since the lower edge of the vehicle door usually has an angle in the X and Z directions during installation, the angles can be adjusted by the installation surfaces of the door lower edge Z-direction telescopic rod 52 and the door lower edge Y-direction telescopic rod 53, and the installation surfaces of the door lower edge Y-direction telescopic rod 53 and the door lower edge clamp.The window frame constraint fixing seat 41 is installed on the upper side of the portal frame 1, the position of the window frame constraint Y-direction telescopic rod 42 is adjusted and fixed on the window frame constraint fixing seat 41 by bolts, the window frame constraint Z-direction telescopic rod 43 is fixed on the top end of the window frame constraint Y-direction telescopic rod 42 by bolts, the window frame upper edge clamp is fixed on the top end of the Z-direction telescopic rod by bolts, the both ends of the door window frame upper edge are clamped by the door upper edge clamp to constrain the upper edge freedom degree 123456. Since the door window frame upper edge usually has an angle in the X-direction and the Z-direction during installation, the angle adjustment can be performed through the installation surface of the window frame constraint Y-direction telescopic rod 42 and the window frame constraint Z-direction telescopic rod 43 and the installation surface of the window frame constraint Z-direction telescopic rod 43 and the window frame upper edge clamp. The holes to be measured are loaded by the loading cylinder, and the deformation amount of each measured hole is measured by the displacement sensor. This is the constraint test scheme of the sliding door inner panel fixing point stiffness.

[0089] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the protection scope of the present application is not limited to the specific details in the above-described embodiments. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical scope disclosed by the present application, and these simple changes all belong to the protection scope of the present application.

[0090] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0091] In addition, the various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should be considered as disclosed by the present application.

Claims

1. A door stiffness constraint testing device, characterized in that, It includes a gantry frame (1), a left hinge constraint fixture assembly (2), a right door lock constraint fixture assembly (3), an upper window frame constraint fixture assembly (4), and a lower door bottom edge constraint fixture assembly (5); multiple left hinge constraint fixture assemblies (2) are provided on the left column (12) of the gantry frame (1) from top to bottom, a right door lock constraint fixture assembly (3) is provided on the right column (12) of the gantry frame (1), multiple upper window frame constraint fixture assemblies (4) are provided above the gantry frame (1), and multiple lower door bottom edge constraint fixture assemblies (5) are provided below the gantry frame (1); The left hinge constraint fixture assembly (2) includes a hinge constraint fixing seat (21), a hinge constraint X-direction telescopic rod (22), a hinge constraint Y-direction telescopic rod (23), and a hinge constraint L-shaped mounting plate (26). The hinge constraint fixing seat (21) is bolted to the column (12) on the left side of the gantry frame (1), and the front end of the hinge constraint fixing seat (21) is provided with a first base square groove (24). The hinge constraint X-direction telescopic rod (22) is inserted into and bolted to the first base square groove (24), and a first disc (25) is provided on the upper right side of the hinge constraint X-direction telescopic rod (22). One end of the hinge constraint Y-direction telescopic rod (23) is set on the first disc (25), and the other end of the front end is fixed with a hinge constraint L-shaped mounting plate (26) for installing the hinge. The right-side door lock constraint fixture assembly (3) includes a door lock constraint fixing seat (31), a door lock constraint X-direction telescopic rod (32), a door lock constraint Y-direction telescopic rod (33), and a door lock constraint clamp (34). The door lock constraint fixing seat (31) is fixed on the column (12) on the right side of the gantry frame (1), and the front end of the door lock constraint fixing seat (31) is provided with a second base square groove (35). The door lock constraint X-direction telescopic rod (32) is inserted into and bolted to the second base square groove (35). The top left side of the door lock constraint X-direction telescopic rod (32) is provided with a second disc (36). One end of the door lock constraint Y-direction telescopic rod (33) is set on the second disc (36), and the front end of the other end is provided with a third disc (37). The rear end of the door lock constraint clamp (34) is connected to the third disc (37), and the third disc (37) is provided with a fisheye bearing. The upper window frame constraint fixture assembly (4) includes a window frame constraint fixing seat (41), a window frame constraint Y-direction telescopic rod (42), a window frame constraint Z-direction telescopic rod (43), and a window frame upper edge constraint clamp (44). The window frame constraint fixing seat (41) is fixed to the bottom of the upper crossbeam (13) of the gantry frame (1), and the bottom surface of the window frame constraint fixing seat (41) is provided with a third base square groove (45). The window frame constraint Y-direction telescopic rod (42) is inserted and bolted into the third base square groove (45). The front end of the window frame constraint Y-direction telescopic rod (42) is provided with a fourth disc (46). One end of the window frame constraint Z-direction telescopic rod (43) is set on the fourth disc (46), and the bottom of the other end is provided with a fifth disc (47). The top of the window frame upper edge constraint clamp (44) is connected to the fifth disc (47) through a sixth disc (48). The lower edge constraint fixture assembly (5) includes a lower edge fixing seat (51), a lower edge Z-direction telescopic rod (52), a lower edge Y-direction telescopic rod (53), and a lower edge constraint fixture (54); wherein the lower edge fixing seat (51) is fixed to the front end of the lower crossbeam (14) of the gantry frame (1), and the front end of the lower edge fixing seat (51) is provided with a fourth base square groove (55), the lower edge Z-direction telescopic rod (52) is inserted and bolted into the fourth base square groove (55), and a seventh disc (56) is provided on the right side of the top of the lower edge Z-direction telescopic rod (52), one end of the lower edge Y-direction telescopic rod (53) is set on the seventh disc (56), and the top surface of the other end is provided with an eighth disc (57), and the lower edge constraint fixture (54) is connected to the eighth disc (57) through the ninth disc (58).

2. The door stiffness constraint testing device according to claim 1, characterized in that, The gantry frame (1) includes a base (11), a column (12), an upper crossbeam (13) and a lower crossbeam (14), wherein the column (12) is fixed on the base (11), and the upper and lower ends of the column (12) are connected together by the upper crossbeam (13) and the lower crossbeam (14) respectively.

3. The door stiffness constraint testing device according to claim 2, characterized in that, The front end face of the column (12) of the gantry frame (1) is provided with evenly arranged threaded holes.

4. The door stiffness constraint testing device according to claim 3, characterized in that, The upper crossbeam (13) and lower crossbeam (14) of the gantry frame (1) are both I-shaped crossbeams. The bottom surface of the upper crossbeam (13) is provided with a clamp mounting hole, and the front end surface of the lower crossbeam (14) is provided with a threaded mounting hole. The two ends of the upper crossbeam (13) and lower crossbeam (14) are respectively fixed to the corresponding columns (12) by steel plates.

5. The door stiffness constraint testing device according to claim 1, characterized in that, The first disc (25) has an elongated hole, and the hinge constraint Y-direction telescopic rod (23) has an elongated hole corresponding to the elongated hole on the first disc (25) for bolt connection with the first disc (25) and Y-direction position adjustment. One side plate of the hinge constraint L-shaped mounting plate (26) is fixed to the end of the hinge constraint Y-direction telescopic rod (23), and the other side plate has multiple elongated holes distributed horizontally and vertically for mounting the hinge.

6. The door stiffness constraint testing device according to claim 1, characterized in that, The second disc (36) has an elongated hole, and the door lock constraint Y-direction telescopic rod (33) has an elongated hole corresponding to the elongated hole on the second disc (36) for bolt connection with the second disc (36) and Y-direction position adjustment; the door lock constraint clamp (34) is an L-shaped plate, and the right end of one side plate is arc-shaped. This side plate is connected to the third disc (37), and this side plate has a through hole corresponding to the fisheye bearing in the third disc (37). The other side plate of the door lock constraint clamp (34) has multiple elongated holes distributed horizontally and vertically for connection with the door lock mounting hole.

7. The door stiffness constraint testing device according to claim 1, characterized in that, The fourth disk (46) is provided with an elongated hole, and the window frame constraint Z-direction telescopic rod (43) is provided with an elongated hole corresponding to the elongated hole on the fourth disk (46), which is used for bolt connection with the fourth disk (46) and Z-direction position adjustment and X-axis angle adjustment; the sixth disk (48) is movably connected to the bottom of the fifth disk (47) and can be adjusted around the Z-axis angle.

8. The door stiffness constraint testing device according to claim 1, characterized in that, The seventh disc (56) is provided with an elongated hole, and the Y-axis telescopic rod (53) at the lower edge of the door is provided with an elongated hole corresponding to the elongated hole on the seventh disc (56), which is used for bolt connection with the seventh disc (56) and for Y-axis position adjustment and Z-axis angle adjustment; the ninth disc (58) is movably connected to the top of the eighth disc (57) and can be adjusted around the Z-axis angle.

9. A method for conducting door stiffness constraint tests using the door stiffness constraint test apparatus as described in claim 1, characterized in that, The original thirteen operating conditions are divided into five test constraint categories based on different constraint methods: door vertical stiffness; window frame lateral stiffness; windshield lower band stiffness, rearview mirror fixing point stiffness, limiter fixing point stiffness, window regulator fixing point stiffness, armrest bracket fixing point stiffness, inner handle fixing point stiffness, inner handle fixing point stiffness, and outer handle fixing point stiffness; hinge fixing point stiffness, outer panel surface stiffness, and door lock fixing point stiffness; and a special category—sliding door inner panel fixing point stiffness. Stiffness values ​​are measured through one of these five categories for different door models. Details are as follows: Category 1: Door Vertical Stiffness This method is applied to the vertical stiffness of car doors. The vertical stiffness of car doors is to fully constrain the door hinges and apply a downward force to the door lock when the door is closed to measure the deformation of the door. The left hinge constraint tooling assembly (2) is used to constrain the six degrees of freedom of the upper and lower hinge sides. The position of the hinge constraint fixing seat (21) in the Z direction and the distance between the two hinge constraint fixing seats (21) are adjusted to achieve the hinge installation spacing and the installation height distance from the ground. The extension distance of the mounting surface of the hinge constraint Y-direction telescopic rod (23) is adjusted to achieve the standard distance that does not interfere with the gantry frame (1) when the force loading cylinder loads the hinge fixing point. Finally, the upper and lower hinges of the car door are connected to the mounting surface of the hinge constraint L-shaped mounting plate (26) at the top of the hinge constraint Y-direction telescopic rod (23) with bolts. The loading cylinder is used to apply downward force at the door lock, and the displacement sensor is used to measure the sinking at the door lock to obtain the vertical stiffness value of the car door. Category 2: Window Frame Lateral Stiffness Applied to the lateral stiffness of the window frame, the lateral stiffness of the window frame is to measure the deformation of the window frame by applying a lateral force to the top and middle of the window frame when the door is closed, with the door hinge fully constrained and the door lock fully constrained; among them, the six degrees of freedom of the upper and lower hinge sides are constrained by the left hinge constraint fixture assembly (2): adjust the position of the hinge constraint fixing seat (21) in the Z direction and the distance between the two hinge constraint fixing seats (21) to achieve the hinge installation spacing and the installation height distance from the ground; adjust the extension distance of the hinge constraint Y-direction telescopic rod (23) mounting surface to achieve the force loading cylinder loading the hinge fixing point and the gantry frame ( 1) The distance standard that does not interfere is sufficient; then use the right door lock constraint fixture assembly (3) to constrain the six degrees of freedom of the door lock: adjust the height of the right door lock constraint fixture assembly (3) to the door lock installation position, adjust the position of the door lock constraint Y-direction telescopic rod (33) to reach the door lock position, pass the round rod fixing clamp installed on the door lock through the through hole on the arc side plate of the door lock constraint clamp (34), and then pass through the fish eye bearing at the front end of the door lock constraint Y-direction telescopic rod (33) to complete the constraint of the six degrees of freedom of the door lock; use the loading cylinder to apply standard force to the top and middle points of the window frame respectively, and measure the deformation of the window frame on the opposite side of the window frame; Category 3: Stiffness of windshield underwire, rearview mirror fixing point, limiter fixing point, window regulator fixing point, handrail bracket fixing point, inner handle fixing point, inner lever fixing point, and outer handle fixing point. This is applied to the stiffness of the windshield under-line, the stiffness of the rearview mirror fixing point, the stiffness of the limiter fixing point, the stiffness of the window regulator fixing point, the stiffness of the handrail bracket fixing point, the stiffness of the inner handle fixing point, the stiffness of the inner handle fixing point, and the stiffness of the outer handle fixing point. These eight working conditions will constrain the upper and lower hinges to six degrees of freedom and the door lock to six degrees of freedom when constrained. The left hinge constraint fixture assembly (2) is used to constrain the six degrees of freedom of the upper and lower hinge sides: adjust the position of the hinge constraint fixing seat (21) in the Z direction and the distance between the two hinge constraint fixing seats (21) to achieve the hinge installation spacing and the distance from the ground installation height; adjust the extension distance of the hinge constraint Y-direction telescopic rod (23) mounting surface to achieve the force loading cylinder on the hinge fixing The distance standard that does not interfere with the gantry frame (1) during fixed-point loading is sufficient; the six degrees of freedom of the door lock are constrained by the right door lock constraint fixture assembly (3): the height of the right door lock constraint fixture assembly (3) is adjusted to the door lock installation position, and the position of the door lock constraint Y-direction telescopic rod (33) is adjusted to reach the door lock position. During the door lock fixing process, since the door lock installation surface has an angle, the angle is adjusted by the connection between the second disc (36) at the top of the door lock constraint Y-direction telescopic rod (33) and the door lock constraint X-direction telescopic rod (32) to complete the constraint of the six degrees of freedom of the door lock; the loading cylinder is used to load the points or holes that need to be measured, and the deformation of each measured point or hole is measured by the displacement sensor. Category 4: Hinge fixing point stiffness, outer panel surface stiffness, and door lock fixing point stiffness; It is applied to the stiffness of hinge fixing points, the stiffness of outer panel surface, and the stiffness of door lock fixing points; the constraint conditions for the stiffness of outer panel surface are: six degrees of freedom for the upper and lower hinges of the car door, six degrees of freedom for the door lock, and six degrees of freedom for the two sides of the lower end of the car door; the stiffness of hinge fixing points is to remove one of the hinges and measure the stiffness of its fixing point, and the other constraint conditions are the same as the constraint conditions for the stiffness of outer panel surface; the stiffness of door lock fixing points is to release the constraint at the door lock and release the constraint at the lower edge of the hinge side; the six degrees of freedom of the upper and lower hinge sides are constrained by the left hinge constraint tooling assembly (2). Adjust the position of the hinge constraint fixing seat (21) in the Z direction and the distance between the two hinge constraint fixing seats (21) to achieve the hinge installation spacing and the installation height distance from the ground; adjust the extension distance of the hinge constraint Y-direction telescopic rod (23) to achieve the standard distance that does not interfere with the gantry frame when the force loading cylinder loads the hinge fixing point; use the right door lock constraint fixture assembly (3) to constrain the six degrees of freedom of the door lock: adjust the height of the right door lock constraint fixture assembly (3) to the door lock installation position, and adjust the door lock constraint Y-direction telescopic rod (33) The position of the door lock is adjusted to the door lock position. During the door lock fixing process, since the door lock mounting surface has an angle, the door lock six degrees of freedom are constrained by adjusting the angle of the second disc (36) at the top of the door lock constraint Y-direction telescopic rod (33) and the door lock constraint X-direction telescopic rod (32), and the mounting surface of the door lock constraint Y-direction telescopic rod (33) and the door lock constraint clamp (34). The position of the door lower edge Z-direction telescopic rod (52) is adjusted and fixed to the door lower edge fixing seat (51) with bolts. The door lower edge constraint clamp (54) is used to fix the door lower edge. The edges are clamped at both ends, thus constraining the six degrees of freedom of the lower edge; since the lower edge of the door usually has an angle in the X and Z directions during installation, the angle is adjusted by the seventh disk (56) on the Z-direction telescopic rod (52) and the Y-direction telescopic rod (53) of the lower edge of the door, the eighth disk (57) on the Y-direction telescopic rod (53) of the lower edge of the door, and the ninth disk (58) under the constraint clamp (54) of the lower edge of the door; the loading cylinder is used to load the points or holes to be measured, and the deformation of each measured point or hole is measured by the displacement sensor at the same time; Category 5: Special Category - Sliding Door Inner Panel Fixed Point Stiffness; This is a special case classification, specifically for the constraint of the sliding door inner panel fixing point test. In the sliding door inner panel fixing point test, it is necessary to constrain the upper and lower hinges to six degrees of freedom, the door lock to six degrees of freedom, the two ends of the lower edge of the door to six degrees of freedom, and the two ends of the upper edge of the window frame to six degrees of freedom. The left hinge constraint fixture assembly (2) is used to constrain the six degrees of freedom of the upper and lower hinge sides: adjust the position of the hinge constraint fixing seat (21) in the Z direction and the distance between the two hinge constraint fixing seats (21) to achieve the hinge installation spacing and the distance from the ground installation height; adjust the extension distance of the hinge constraint Y-direction telescopic rod (23) mounting surface to achieve the force loading cylinder. The distance standard that does not interfere with the gantry frame (1) when loading the hinge fixing point is sufficient; the right door lock constraint fixture assembly (3) is used to constrain the six degrees of freedom of the door lock: the height of the right door lock constraint fixture assembly (3) is adjusted to the door lock installation position, and the position of the door lock constraint Y-direction telescopic rod (33) is adjusted to reach the door lock position. During the door lock fixing process, since the door lock installation surface has an angle, the third disc (37) on the door lock constraint Y-direction telescopic rod (33) and the second disc (36) on the top left side of the door lock constraint X-direction telescopic rod (32), the arc side plate on the door lock constraint fixture (34) and the door lock constraint fixture (34) are used. The third disc (37) at the rear end is used to adjust the angle to complete the constraint of the six degrees of freedom of the door lock; the position of the Z-direction telescopic rod (52) of the lower edge of the door is adjusted and then the two ends of the lower edge of the door are clamped and constrained by the constraint clamp (54) of the lower edge of the door to constrain the six degrees of freedom of the lower edge; since the lower edge of the door usually has an angle in the X and Z directions during installation, the angle is adjusted by the seventh disc (56) on the Z-direction telescopic rod (52) of the lower edge of the door, the Y-direction telescopic rod (53) of the lower edge of the door, the eighth disc (57) on the Y-direction telescopic rod (53) of the lower edge of the door, and the ninth disc (58) under the constraint clamp (54) of the lower edge of the door; the window frame constraint Y The upper edge of the car door window frame is clamped at both ends by the upper edge constraint clamp (44) at the position of the telescopic rod (42), thereby constraining the upper edge six degrees of freedom; since the upper edge of the car door window frame usually has an angle in the X and Z directions during installation, the angle is adjusted by the fourth disk (46) on the window frame constraint Y telescopic rod (42), the window frame constraint Z telescopic rod (43), the fifth disk (47) on the window frame constraint Z telescopic rod (43), and the sixth disk (48) on the window frame upper edge constraint clamp (44); the loading cylinder is used to load the hole to be measured, and the deformation of each measured hole is measured by the displacement sensor.

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