Car door static stiffness test device

Abstract

The present invention discloses a vehicle door static stiffness test device, comprising a mounting base, a bearing assembly, and a restraining assembly. The mounting base comprises two first mounting bases spaced laterally apart, the two first mounting bases being used to be mounted to the ground. The bearing assembly comprises a vehicle door mounting frame, the vehicle door mounting frame being disposed between the two first mounting bases and being rotatably mounted along a laterally extending axis. The upper end surface of the vehicle door mounting frame is used to mount the vehicle door to be tested. The restraining assembly comprises a plurality of restraining members disposed on the vehicle door mounting frame and spaced apart, the plurality of restraining members being used to cooperate and secure the vehicle door to be tested. By driving the vehicle door mounting frame to rotate relative to the two first mounting bases, the orientation of the vehicle door to be tested relative to the ground is changed, thereby enabling stiffness testing of the vehicle door at any angle.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, in particular to a vehicle door static stiffness testing device. Background Art

[0002] When conducting static stiffness tests on automobile doors, the designed test bench structure is usually complex to ensure the door's restrained state. This can lead to problems such as over- or under-constraint of the door, high equipment costs, low precision, and a narrow range of vehicle applications. This test bench cannot fully reflect all actual vehicle operating conditions, affecting the accuracy of the test results. Summary of the Invention

[0003] The main purpose of the present invention is to provide a vehicle door static stiffness test device, which can realize the restraint posture of the vehicle door at any angle and has high test versatility.

[0004] To achieve the above object, the present invention provides a vehicle door static stiffness test device, comprising:

[0005] The mounting base includes two first mounting bases spaced apart in a transverse direction, the two first mounting bases being used for mounting on the ground;

[0006] a bearing assembly, comprising a door mounting frame, the door mounting frame being disposed between the two first mounting seats and being rotatably mounted along a transversely extending axis, the upper end surface of the door mounting frame being used for mounting the door to be tested; and

[0007] The restraint assembly comprises a plurality of restraint members which are arranged on the door mounting frame and are spaced apart from each other. The plurality of restraint members are used to fix the door to be tested.

[0008] Optionally, the door mounting bracket includes:

[0009] a frame, wherein the frame is rotatably mounted on the two first mounting seats along both ends thereof in a lateral direction; and

[0010] A movable beam is provided in the frame, the movable beam extends in the longitudinal direction and is movably installed in the transverse direction on both side walls of the frame in the longitudinal direction;

[0011] The plurality of restraint members are respectively arranged on the movable beam and the frame.

[0012] Optionally, both end surfaces of the movable beam arranged in the longitudinal direction are provided with sliding grooves, and the sliding grooves are arranged to be continuous at both ends in the transverse direction;

[0013] The two longitudinal side walls of the frame are arranged in the two sliding grooves;

[0014] The bearing assembly further includes a locking structure, which includes:

[0015] A plurality of first mounting holes are provided on a wall surface of the slide groove arranged in an up-down direction;

[0016] a plurality of second mounting holes, provided on the upper end surface of the frame; and

[0017] At least two locking bolts are provided corresponding to the two slide grooves respectively, and each locking bolt can be selectively passed through one of the first mounting holes and one of the second mounting holes to fix the movable beam to the frame.

[0018] Optionally, the two opposite end surfaces of the first mounting seats are each provided with a communication hole;

[0019] The vehicle door static stiffness test device further includes two rotating assemblies, each of which includes:

[0020] a rotating shaft, one end of which is fixed to the middle portion of the side end of the door mounting bracket, and the other end of which passes through the communicating hole; and

[0021] A turntable is fixed to the end portion of the rotating shaft protruding from the communicating hole.

[0022] Optionally, each of the rotating components further includes a first limiting structure, and the first limiting structure includes:

[0023] Two limit seats, each of which is fixed to a side of the corresponding first mounting seat facing away from the door mounting frame and is disposed on both sides of the communicating hole, each of which is provided with a baffle protruding from the side of the two limit seats facing away from the door mounting frame, each of which has a first threaded hole extending in an up-down direction on opposite sides of the two baffles, and the turntable is disposed between the two baffles; and

[0024] Two first bolts pass through the two first threaded holes respectively to tighten against the side surface of the turntable.

[0025] Optionally, each of the rotating components further includes a second limiting structure, and the second limiting structure includes:

[0026] A plurality of arc-shaped holes are provided on a side of the turntable facing away from the door mounting frame, and the plurality of arc-shaped holes are spaced apart along the circumference of the turntable;

[0027] a plurality of second threaded holes, provided on a side of the corresponding first mounting seat away from the door mounting frame, the plurality of second threaded holes being provided corresponding to the plurality of arc-shaped holes; and,

[0028] A plurality of second bolts are provided, wherein the screw rod of each second bolt passes through one of the arc-shaped holes to be threadedly fixed with one of the second threaded holes, and the nut of each second bolt is tightly pressed against the end surface of the turntable.

[0029] Optionally, the plurality of restraints include at least one hinge side restraint, the hinge side restraint including a first plate segment extending in the up and down directions, and two second plate segments provided at both ends of the first plate segment and extending in the transverse direction, the two second plate segments extending in directions away from each other, one of the second plate segments being fixed to the vehicle door mounting frame, and the other second plate segment being used to be fixed to the hinge mounting hole of the vehicle door to be tested.

[0030] Optionally, the plurality of restraints include at least one door restraint, and the door restraint includes:

[0031] a base, fixed to the door mounting bracket; and

[0032] The clamping structure includes a first clamping arm and a second clamping arm. The first clamping arm is fixed to the base, and the second clamping arm has a movable stroke close to or away from the first clamping arm, so as to cooperate with the first clamping arm to jointly clamp and fix the side of the vehicle door to be tested.

[0033] Optionally, the plurality of restraints include at least one locking restraint, and the locking restraint includes:

[0034] a fixing seat, fixed to the door mounting frame; and

[0035] A lock body fixing block is mounted on the fixing seat via a ball joint, and the lock body fixing block is used to cooperate with the lock core of the vehicle door to be tested.

[0036] Optionally, the lock body fixing block includes a first plate and a second plate stacked in sequence; and / or,

[0037] A shaft is provided on one side of the lock body fixing block. The length of the shaft is adjustable, and the end of the shaft is ball-jointed to the fixing seat.

[0038] In the technical solution of the present invention, the vehicle door to be tested is constrained by multiple restraints, so that the vehicle door to be tested is fixed on the vehicle door mounting frame. By driving the vehicle door mounting frame to rotate relative to the two first mounting seats, the orientation of the vehicle door to be tested relative to the ground is changed, thereby realizing the stiffness test of the vehicle door at any angle, which can simulate all angle conditions of actual vehicle use and improve the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0040] Figure 1 A three-dimensional schematic diagram of an embodiment of a vehicle door static stiffness test device provided by the present invention;

[0041] Figure 2 for Figure 1 A three-dimensional diagram of the center door mounting bracket;

[0042] Figure 3 for Figure 1 A perspective diagram of the rotating assembly (at one angle);

[0043] Figure 4 for Figure 1 A three-dimensional schematic diagram of the rotating component (from another angle);

[0044] Figure 5 for Figure 1 A three-dimensional schematic diagram of the first mounting base;

[0045] Figure 6 for Figure 1 A top view of the middle door mounting bracket and the restraint member;

[0046] Figure 7 for Figure 1 A three-dimensional schematic diagram of the middle lock restraint.

[0047] Description of Figure Numbers:

[0048] Label name Label name 100 Car door static stiffness test device 331 Fixed seat 11 First mount 332 Lock body fixing block 111 connecting hole 3321 The first section 21 Door mounting bracket 3322 Second section 211 Frame 333 shaft 211a Second mounting hole 4 Rotating components 212 movable beam 41 Rotation axis 212a First mounting hole 42 turntable 31 Hinge side restraints 431 Limit seat 311 Second plate section 4311 bezel 32 Door side restraints 432 First Bolt 321 base 441 Arc hole 322 Clamping structure 442 Second threaded hole 33 Locking restraints

[0049] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] To ensure the restraint of vehicle doors during static door stiffness testing, the designed test bench structure is often complex. This can lead to over- or under-constraint of the doors, high equipment costs, low accuracy, and a narrow vehicle application range. Furthermore, the stiffness test conditions that can be simulated are relatively limited and cannot fully reflect all actual vehicle operating conditions. Therefore, current static door stiffness test equipment is not yet perfect, and a test apparatus and test method that can be used to test various door stiffness conditions is needed.

[0054] In view of this, the present invention provides a vehicle door static stiffness test device, which is highly versatile, simple and practical, can be applied to revolving doors, can effectively reduce the cost of test facilities, and improve the test accuracy. Figures 1 to 7 Schematic diagram of an embodiment of a vehicle door static stiffness test device.

[0055] Please refer to Figure 1 、 Figure 2 and Figure 5 The vehicle door static stiffness test device 100 includes a mounting seat, a load-bearing assembly and a constraint assembly. The mounting seat includes two first mounting seats 11 arranged at intervals along the transverse direction. The two first mounting seats 11 are used to be installed to the ground. The load-bearing assembly includes a vehicle door mounting frame 21. The vehicle door mounting frame 21 is arranged between the two first mounting seats 11 and can be rotatably installed along a transversely extending axis. The upper end surface of the vehicle door mounting frame 21 is used for installing the vehicle door to be tested. The constraint assembly includes a plurality of constraints arranged on the vehicle door mounting frame 21 and at intervals. The plurality of constraints are used to fix the vehicle door to be tested.

[0056] In the technical solution of the present invention, the vehicle door to be tested is constrained by multiple said restraints, so that the vehicle door to be tested is fixed on the vehicle door mounting frame 21, and by driving the vehicle door mounting frame 21 to rotate relative to the two first mounting seats 11, the orientation of the vehicle door to be tested relative to the ground is changed, thereby realizing the stiffness test of the vehicle door at any angle, which can simulate all angle conditions of actual vehicle use, improve the accuracy of the test, and is suitable for the installation of doors of commercial and passenger vehicles, realizing common use of commercial and passenger vehicles.

[0057] For further information, please refer to Figure 2 The door mounting frame 21 includes a frame 211 and a movable beam 212. The frame 211 is rotatably mounted on the two first mounting seats 11 at both ends along the transverse direction. The movable beam 212 is arranged in the frame 211. The movable beam 212 extends longitudinally and is movably mounted on the two longitudinal side walls of the frame 211 along the transverse direction. A plurality of restraints are respectively arranged on the movable beam 212 and the frame 211. The movable beam 212 can form a rigid mounting plane together with part of the frame 211 border. By adjusting the position of the movable beam 212, the size of the mounting plane can be adjusted, so that doors of different sizes can be mounted on the door mounting frame 21, thereby improving the universality of the device. It can be understood that the plurality of restraints correspond to different installation orientations and the parts that cooperate with the door are also different, so there are different restraint structures.

[0058] In order to realize the sliding installation of the movable beam 212, in this embodiment, both end surfaces of the movable beam 212 along the longitudinal direction are provided with sliding grooves, and the sliding grooves are set through at both ends along the transverse direction. The two side walls of the frame 211 along the longitudinal direction are arranged in the two sliding grooves, so that the relative sliding of the movable beam 212 can be realized, and in this embodiment, it is convenient to ensure that the plane height of the movable beam 212 and the frame 211 are close.

[0059] To facilitate the installation of doors of varying specifications, it is necessary to ensure that the movable beam 212 remains fixed after being adjusted to the desired position. To this end, in this embodiment, the support assembly further includes a locking structure comprising a plurality of first mounting holes 212a, a plurality of second mounting holes 211a, and at least two locking bolts. The plurality of first mounting holes 212a are provided on a vertically extending wall of the guide slot, and the plurality of second mounting holes 211a are provided on the upper end surface of the frame 211. Two locking bolts are provided for each of the two guide slots, and each locking bolt can be selectively passed through one of the first mounting holes 212a and one of the second mounting holes 211a to secure the movable beam 212 to the frame 211. The two locking bolts secure both ends of the movable beam 212 via a bolt-nut coupling. This structure is simple and easy to assemble and disassemble. Operators can select different first mounting holes 212a and second mounting holes 211a to match according to actual location requirements. It should be noted that more locking bolts can be provided to improve tightening.

[0060] The present invention does not limit the specific method of realizing the optional installation of the door mounting bracket 21. In one embodiment, a motor can be provided to drive the vehicle door mounting bracket 21. In this embodiment, please refer to Figures 3 and 4The opposing end surfaces of the two first mounting seats 11 are each provided with a communicating hole 111. The vehicle door static stiffness testing apparatus 100 further includes two rotating assemblies 4, each comprising a rotating shaft 41 and a rotating disk 42. One end of the rotating shaft 41 is fixed to the middle portion of the side end of the vehicle door mounting frame 21, and the other end passes through the communicating hole 111. The rotating disk 42 is fixed to the end of the rotating shaft 41 that protrudes from the communicating hole 111. In this embodiment, an operator manually rotates the rotating disk 42, thereby transmitting force to the vehicle door mounting frame 21 through the rotating shaft 41, thereby adjusting the rotation. The two rotating disks 42 are arranged in a transversely opposed relationship, and the rotation angles of the two rotating disks 42 can be the same or different, thereby enabling stiffness testing under a variety of operating conditions. This arrangement is cost-effective and simple in structure. It is understood that, to achieve component functionality and ensure component strength, the rotating disks 42 are assembled from multiple parts. The rotating shaft 41 is also connected to the vehicle door mounting frame 21 via a flange or other structure, which will not be described in detail here.

[0061] During the stiffness test, the tilt angle of the door mounting frame 21 should be kept stable. The manual drive of the turntable 42 is a heavy burden on the operator to hold the turntable during the test. Figures 4 and 5 Each of the rotating components 4 also includes a first limiting structure, which includes two limiting seats 431 and two first bolts 432. The two limiting seats 431 are fixed to the side of the corresponding first mounting seat 11 away from the vehicle door mounting frame 21, and are respectively arranged on both sides of the connecting hole 111. The sides of the two limiting seats 431 away from the vehicle door mounting frame 21 are both protruding with baffles 4311, and the opposite sides of the two baffles 4311 are penetrated by first threaded holes extending in the up and down directions. The turntable 42 is arranged between the two baffles 4311, and the two first bolts 432 respectively pass through the two first threaded holes to press against the side surface of the turntable 42. There is a gap between the two baffles 4311 and the outer side surface of the turntable 42. In the free state, the turntable 42 can rotate freely in the space between the two limit seats 431. When it needs to be fixed, tighten the first bolt 432 to press its threaded section against the turntable. At this time, the turntable is restricted in the up and down directions and cannot continue to rotate. The threaded matching method can achieve self-locking, with a simple structure and good stability.

[0062] In order to further improve the fastening effect, each of the rotating components 4 also includes a second limiting structure, which includes a plurality of arc-shaped holes 441, a plurality of second threaded holes 442 and a plurality of second bolts. The plurality of arc-shaped holes 441 are arranged on the side of the turntable 42 away from the vehicle door mounting frame 21, and the plurality of arc-shaped holes 441 are arranged at intervals along the circumference of the turntable 42; the plurality of second threaded holes 442 are arranged on the side of the corresponding first mounting seat 11 away from the vehicle door mounting frame 21, and the plurality of second threaded holes 442 are arranged corresponding to the plurality of arc-shaped holes 441. Specifically, considering the size of the first mounting seat 11, the outer side of the turntable 42 may protrude from the first mounting seat 11. Therefore, at different rotation angles of the turntable 42, the number of second threaded holes 442 corresponding to each arc-shaped hole 441 may be different. The screw of each second bolt passes through a said arc-shaped hole 441 to be threadedly fixed with a second threaded hole 442, and the nut of each second bolt is tightly pressed against the end surface of the turntable 42. In this embodiment, six second threaded holes 442 are provided. The circle formed by the line connecting the six second threaded holes 442 is concentrically arranged with the circle formed by the plurality of arc-shaped holes 441. Please refer to Figure 4 At this time, three of the second threaded holes 442 correspond to the arc-shaped holes 441 located at the top, and the remaining two arc-shaped holes 441 correspond to one each. When tightening, some of the second threaded holes 442 can be selected to tighten the second bolts, thereby fixing the turntable 42 in the horizontal direction, ensuring that the turntable 42 does not deviate during the test, and improving stability.

[0063] It should be noted that when the second bolt is loosened, the turntable 42 will rotate. Due to the design of the arc-shaped hole 441, the second bolt reaches its movement limit when it abuts against the end of the arc-shaped hole 441. Therefore, the turntable 42 can be limited in movement when the bolt is loosened, ensuring that it will not rotate continuously by too large an angle when adjusting the angle of the door mounting frame 21, thereby improving the safety of the test.

[0064] In order to improve the restraint capacity of the door to be tested and simulate the actual installation of the door, please refer to Figure 6 In one embodiment, the plurality of restraints include at least one hinge-side restraint 31. The hinge-side restraint 31 comprises a first plate segment extending vertically and two second plate segments 311 disposed at opposite ends of the first plate segment and extending laterally. The two second plate segments 311 extend in directions away from each other. One second plate segment 311 is secured to the door mounting bracket 21, while the other second plate segment 311 is secured to the hinge mounting hole of the door to be tested. The hinge-side restraint 31 is arranged in a Z-shape and secured to the hinge mounting hole of the door to be tested via bolts, thereby simulating the actual installation state of the door.

[0065] In another embodiment, the plurality of restraining members include at least one door edge restraining member 32. The door edge restraining member 32 includes a base 321 and a clamping structure 322. The base 321 is fixed to the vehicle door mounting frame 21. The clamping structure 322 includes a first clamping arm and a second clamping arm. The first clamping arm is fixed to the base 321. The second clamping arm has a range of motion that allows it to move toward or away from the first clamping arm, thereby cooperating with the first clamping arm to clamp and secure the side edge of the vehicle door to be tested. Initially, the first and second clamping arms are opened, allowing the edge of the door panel to extend into the space between the first and second clamping arms, and the two clamping arms are fastened together to achieve door edge restraint. Specifically, the first and second clamping arms are both L-shaped, with the two L-shaped clamping arms positioned opposite each other. The component that achieves the locking function of the first and second clamping arms is a manual locking mechanism. Swinging the handle can cause the second clamping arm to swing. This locking mechanism is common in test platforms and will not be described in detail here.

[0066] In another embodiment, please refer to Figure 7 The multiple restraining members include at least one latch restraining member 33, which comprises a fixing base 331 and a lock body fixing block 332. The fixing base 331 is fixed to the vehicle door mounting bracket 21, and the lock body fixing block 332 is mounted to the fixing base 331 using a ball joint. The lock body fixing block 332 is configured to engage with the lock cylinder of the vehicle door to be tested. The lock body fixing block 332 engages with the vehicle door latch, simulating the actual restraint state of the latch when the vehicle door is closed through the ball joint, thereby ensuring test accuracy.

[0067] Specifically, a shaft 333 is provided on one side of the lock body fixing block 332, and the end of the shaft 333 is mounted on the fixing seat 331 with a ball joint. A ball head protrudes from the side of the fixing seat 331, and a through hole extending in the vertical direction is penetrated in the middle of the ball head. The end of the shaft 333 is penetrated by a through hole extending in the vertical direction. Through a vertical insertion rod, the shaft 333 is adaptively adjusted. The adjustable length of the shaft 333 allows for flexible matching with doors of various sizes. The free movement of the ball joint head can simulate the restrained state of the lock body and the lock catch when the door is actually closed, thereby improving the accuracy of the door stiffness test.

[0068] Moreover, the lock body fixing block 332 includes a first plate 3321 and a second plate 3322 stacked in sequence. The first plate 3321 and the second plate 3322 are respectively placed on both sides of the mounting hole area of ​​the door lock body to be tested, and the two are fixed by installing bolts to complete the connection.

[0069] It should be noted that the above two related technical features can be set at the same time or one of them can be set selectively. In this embodiment, they are set at the same time.

[0070] In this embodiment, the entire test device adopts a rotary angle adjustment method to simulate all angle conditions of actual vehicle use. After the angle is determined, the turntable 42 is respectively fixed with a first bolt 432 and a second bolt in the upper and lower directions and the horizontal direction to fix the angle required for the working condition to ensure that the test process is not affected by the slight offset during loading. The movable beam 212 is moved according to the size of the test vehicle door. It can be applied to revolving doors, hoods, tailgates, etc. of various models, and the universality rate of the opening and closing parts is also relatively high. Multiple restraints correspond to the hinges, door edges, and locks of the vehicle door to be tested, which are used to accurately simulate the restraint state under the actual vehicle use condition and improve the test accuracy.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vehicle door static stiffness test device, characterized in that: include: The mounting base includes two first mounting bases spaced apart in a transverse direction, the two first mounting bases being used for mounting on the ground; a bearing assembly, comprising a door mounting frame, the door mounting frame being disposed between the two first mounting seats and being rotatably mounted along a transversely extending axis, the upper end surface of the door mounting frame being used for mounting the door to be tested; and A restraint assembly, comprising a plurality of restraint members provided on the door mounting frame and spaced apart from each other, wherein the plurality of restraint members cooperate to fix the door to be tested; The opposite end surfaces of the two first mounting seats are each provided with a communicating hole; The vehicle door static stiffness test device further includes two rotating assemblies, each of which includes: a rotating shaft, one end of which is fixed to the middle portion of the side end of the door mounting bracket, and the other end of which passes through the communicating hole; and a turntable fixed to the end of the rotating shaft protruding from the communicating hole; The first limiting structure is used to limit the rotation of the turntable.

2. The vehicle door static stiffness test device according to claim 1, characterized in that: The door mounting bracket comprises: a frame, wherein the frame is rotatably mounted on the two first mounting seats along both ends thereof in a lateral direction; and A movable beam is provided in the frame, the movable beam extends in the longitudinal direction and is movably installed in the transverse direction on both side walls of the frame in the longitudinal direction; The plurality of restraint members are respectively arranged on the movable beam and the frame.

3. The vehicle door static stiffness test device according to claim 2, characterized in that: Both end surfaces of the movable beam arranged in the longitudinal direction are provided with sliding grooves, and the sliding grooves are arranged through both ends in the transverse direction; The two longitudinal side walls of the frame are arranged in the two sliding grooves; The bearing assembly further includes a locking structure, which includes: A plurality of first mounting holes are provided on a wall surface of the slide groove arranged in an up-down direction; a plurality of second mounting holes, provided on the upper end surface of the frame; and At least two locking bolts are provided corresponding to the two slide grooves respectively, and each locking bolt can be selectively passed through one of the first mounting holes and one of the second mounting holes to fix the movable beam to the frame.

4. The vehicle door static stiffness test device according to claim 3, characterized in that: The first limiting structure includes: Two limit seats, each of which is fixed to a side of the corresponding first mounting seat facing away from the door mounting frame and is disposed on both sides of the communicating hole, each of which is provided with a baffle protruding from the side of the two limit seats facing away from the door mounting frame, each of which has a first threaded hole extending in an up-down direction on opposite sides of the two baffles, and the turntable is disposed between the two baffles; and Two first bolts pass through the two first threaded holes respectively to tighten against the side surface of the turntable.

5. The vehicle door static stiffness test device according to claim 3, characterized in that: Each of the rotating assemblies further includes a second limiting structure, wherein the second limiting structure includes: A plurality of arc-shaped holes are provided on a side of the turntable facing away from the door mounting frame, and the plurality of arc-shaped holes are spaced apart along the circumference of the turntable; a plurality of second threaded holes, provided on a side of the corresponding first mounting seat away from the door mounting frame, the plurality of second threaded holes being provided corresponding to the plurality of arc-shaped holes; and, A plurality of second bolts are provided, wherein the screw rod of each second bolt passes through one of the arc-shaped holes to be threadedly fixed with one of the second threaded holes, and the nut of each second bolt is tightly pressed against the end surface of the turntable.

6. The vehicle door static stiffness test device according to claim 1, characterized in that: The multiple restraints include at least one hinge side restraint, which includes a first plate segment extending in the up and down directions, and two second plate segments arranged at both ends of the first plate segment and extending in the transverse direction, the two second plate segments extending in directions away from each other, one of the second plate segments is fixed to the vehicle door mounting frame, and the other second plate segment is used to be fixed to the hinge mounting hole of the vehicle door to be tested.

7. The vehicle door static stiffness test device according to claim 1, characterized in that: The plurality of restraints include at least one door restraint, wherein the door restraint includes: a base, fixed to the door mounting bracket; and The clamping structure includes a first clamping arm and a second clamping arm. The first clamping arm is fixed to the base, and the second clamping arm has a movable stroke close to or away from the first clamping arm, so as to cooperate with the first clamping arm to jointly clamp and fix the side of the vehicle door to be tested.

8. The vehicle door static stiffness testing device according to claim 1, characterized in that: The plurality of restraints include at least one locking restraint, wherein the locking restraint includes: a fixing seat, fixed to the door mounting frame; and A lock body fixing block is mounted on the fixing seat with a ball joint, and the lock body fixing block is used to cooperate with the lock core of the vehicle door to be tested.

9. The vehicle door static stiffness test device according to claim 8, characterized in that: The lock body fixing block includes a first plate and a second plate stacked in sequence; and / or, A shaft is provided on one side of the lock body fixing block. The length of the shaft is adjustable, and the end of the shaft is ball-jointed to the fixing seat.

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