A test device for simulating vehicle rollover by vertical drop of seat

Abstract

The present invention relates to the field of vehicle collision technology, and specifically to a vertical drop device for seats that simulates vehicle rollover. The device includes a drop generating device, a seat rollover simulation device, and a drop buffer device. The drop generating device is used to generate a natural gravity vertical drop of the seat and the passenger system; the rollover seat simulation device is used to install the seat and fix the passenger, and to simulate the instantaneous posture of the seat and the passenger at the moment of impact; the drop buffer device is used to generate impact force and perform a buffering protection function. The test device produces different degrees of collision and impact effects by adjusting different drop heights, simulates the passenger movement state when the vehicle rolls over and hits the ground through the seat and the passenger system, and conducts research on the passenger restraint system and the passenger injury response. The test device has good repeatability and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle rollover collision, and in particular to a test device for simulating vehicle rollover by vertically falling seats. Background Art

[0002] According to accident statistics from various countries and regions, although rollover accidents do not account for a large proportion of all traffic accidents, their mortality rate is very high.

[0003] At present, both at home and abroad, more and more attention is paid to the research on vehicle rollover, but there are still no mandatory regulations for vehicle rollover tests. The relevant rollover test technology basically exists abroad, and there are very few rollover tests in China. In the existing vehicle rollover regulations and vehicle rollover tests, they are basically based on whole vehicle tests. The test process is huge and complicated, and the evaluation of test results cannot be unified and is not representative. In recent years, my country has also introduced C-NCAP evaluation indicators to urge automakers to improve the rollover collision performance of automobiles, but its fairness and accuracy have been questioned by professionals. Considering the repeatability of test results and test costs, the existing tests are difficult to implement. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem of difficulty in operating whole vehicle tests and poor repeatability, thereby providing a test device for simulating the instantaneous collision posture of seat occupants during vehicle rollover, which can well simulate the instantaneous collision posture and damage mechanism of seat occupants during vehicle rollover, change the test method in existing rollover tests that uses the whole vehicle as the test object, effectively improve the test repeatability, and reduce the cost of test implementation.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A seat vertical drop device for simulating vehicle rollover, the device comprising:

[0007] A fall-initiating system, used to cause the seat to fall vertically;

[0008] A rollover seat simulation system, which is installed in the fall occurrence system and is used to simulate the posture of the seat in the vehicle rollover state after being subjected to a fall impact;

[0009] And a drop buffer system, which is located at the bottom of the drop generation system and is used to simulate the collision impact during the drop and play a role of buffering protection.

[0010] The drop system includes a drop platform, a drop guide rail, a lifting dropper and a drop bracket, wherein the lifting dropper is fixed to the top of the drop bracket, the drop guide rail is fixed on the inner side of the vertical frame part of the drop bracket, the drop platform is arranged on the drop guide rail, and when falling, the drop platform moves vertically along the drop guide rail.

[0011] The tumbling seat simulation system is installed on the falling platform of the falling system, and includes a seat adjuster and a seat. The seat adjuster includes a seat assembly plate, the seat is fixedly set on the seat assembly plate, and the seat surface of the seat is parallel to the seat assembly plate. Before the fall occurs, the seat assembly plate is set at 0-90 degrees with the falling platform.

[0012] The seat adjuster also includes an angle-driven air pressure pump and a rotary hinge.

[0013] The upper surface of the seat assembly plate is provided with T-shaped grooves arranged in a vertical and horizontal manner for longitudinal and transverse installation of the seat; one end of the seat assembly plate is connected to the drop platform through a rotating hinge, and the other end is connected to the drop platform through an angle-driven air pressure pump.

[0014] The angle-driven air pressure pump is installed between the seat assembly flat plate and the drop platform, and is used to adjust and fix the angle between the seat and the drop platform.

[0015] The drop buffer system comprises an upper contact buffer plate and a lower contact buffer plate, wherein the upper contact buffer plate is fixed to the lower surface of the drop platform, and the lower contact buffer plate is fixed to the mounting surface on the lower side of the drop bracket.

[0016] The beneficial effects of the present invention are: (1) The test device provided by the present invention simulates the instantaneous movement posture of the occupant during the vehicle rollover collision by flexibly adjusting the seat drop angle, thereby effectively simplifying the vehicle rollover test device. Since the test operation is easy and can be reused, the cost is greatly reduced.

[0017] (2) The test device provided by the present invention includes a rollover seat simulation device, in which a drop impact seat posture adjustment device is provided to achieve lateral and longitudinal installation of the seat, which can well simulate the movement posture of the seat and the occupant at the moment of rollover collision.

[0018] (3) The test device provided by the present invention, wherein the drop impact seat posture adjustment device can achieve installation angle adjustment of the seat and the occupant system within a certain angle range by setting the angle to drive the air pressure pump.

[0019] (4) The test device provided by the present invention, wherein the drop impact seat posture adjustment device can well realize the installation of various types of seats by setting a T-slot seat assembly flat plate, and has good compatibility.

[0020] (5) The test device provided by the present invention has a T-slot seat assembly plate, which is arranged in a horizontal and vertical form, so as to better realize the horizontal and vertical installation of the seat and ensure the stability of the seat at the moment of falling and impact.

[0021] (6) The test device provided by the present invention, wherein the drop generating device is provided with a drop guide rail, thereby realizing a vertical and stable drop of the test device at any height.

[0022] (7) The test device provided by the present invention, wherein the drop buffer device is capable of effectively simulating the contact force generated by a vehicle rolling over and touching the ground by setting upper and lower contact buffer plates, while providing a good buffering and protective effect on the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 Overall schematic diagram of the experimental device of this application.

[0025] Figure 2 Schematic diagram of the experimental setup for this application.

[0026] Figure 3 Schematic diagram of the seat adjustment device of the present application.

[0027] Figure 4 Partial schematic diagram of the T-slot installation method of this application.

[0028] Description of reference numerals:

[0029] 1-Falling system, 2-Seat rollover simulation system, 3-Falling buffer system, 4-Falling platform, 5-Falling guide rail, 6-Lifting dropper, 7-Falling bracket, 8-Seat adjuster, 9-Seat assembly plate, 10-Angle drive air pump, 11-Rotating hinge, 12-Upper contact buffer plate, 13-Lower contact buffer plate, 14-Mounting bolts DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0031] A vertical drop device for a seat simulating a vehicle rollover comprises a drop generation system 1, a seat rollover simulation system 2 and a drop buffer system 3. The seat rollover simulation system 2 is used to install seats and fix passengers, and to simulate the instantaneous posture of seats and passengers at the moment of impact. The drop device produces different degrees of collision and impact effects by adjusting different drop heights, and simulates the movement state of passengers when the vehicle rolls over and hits the ground by adjusting the angles of the seat and passenger system.

[0032] The drop generating system 1 comprises a drop platform 4, a drop rail 5, and a lifting dropper 6, wherein the drop platform 4 is fixed on the drop rail 5 and moves vertically in a single motion, and the lifting dropper 6 is fixed on the top of the drop bracket 7. During the test, the lifting dropper 6 pulls the drop platform 4 along the drop rail 5 to the test set height and fixes it.

[0033] The seat rollover simulation system 2 is installed on the drop platform 4, including a seat adjuster 8 and a seat. Before the drop, the seat adjuster 8 and the seat surface are adjusted to a certain angle with the plane of the drop platform 4 according to the test requirements. After the seat and the occupant are placed, they are raised to the required height together with the drop platform 4.

[0034] The seat adjuster 8 comprises a seat assembly plate 9, an angle-driven air pressure pump 10, and a rotating hinge 11. The seat angle at the moment of the rollover collision simulated by the seat rollover simulation device 2 is adjusted and set by the angle-driven air pressure pump 10.

[0035] The surface of the seat assembly plate 9 is provided with T-shaped grooves that cross each other in a vertical and horizontal manner, so that the seat can be installed longitudinally and transversely. The angle-driven air pressure pump 10 is installed between the seat assembly plate 9 and the drop platform 4. One end of the seat assembly plate 9 is fixed to the drop platform 4 through a rotating hinge 11, and the other end is fixed to the drop platform 4 through an angle-driven air pressure pump 10. After adjusting and setting a specific angle through the angle-driven air pressure pump 10, the seat rollover simulation system 2 maintains a stable posture on the drop platform 4 through the angle-driven air pressure pump 10 and the rotating hinge 11.

[0036] When the above-mentioned test conditions are adjusted, the lifting dropper 6 releases the drop platform 4 and the seat rollover simulation system 2 at a specific height, and the upper contact buffer plate 12 and the lower contact buffer plate 13 of the drop buffer system 3 collide and impact at corresponding positions. The impact force is transmitted to the test dummy model through the drop platform 4 and the seat rollover simulation system 2, and the dummy model produces a damage response, and then the occupant restraint system and occupant injury response are studied.

[0037] The vertical drop device of the seat of the present application adopts a drop bracket and a seat rollover simulation bracket to simulate the posture and damage of the seat and the occupant during the rollover of the vehicle, and can be operated independently of the whole vehicle, thus simplifying the test device. And due to the simple structure of the test device, the test device has good repeatability and low cost.

Claims

1. A vertical drop device for a seat simulating a vehicle rollover, characterized in that: The device comprises: A fall-generating system (1) for causing the seat to fall vertically; A rollover seat simulation system (2), the rollover seat simulation system (2) being installed in the fall occurrence system (1) and used to simulate the posture of the seat in a rollover state of the vehicle after being subjected to a fall impact; and a fall buffer system (3), the fall buffer system (3) being located at the bottom of the fall generating system (1) and being used to simulate the collision impact during the fall and to play a role of buffering protection; The falling system (1) comprises a falling platform (4), a falling guide rail (5), a lifting dropper (6) and a falling bracket (7), wherein the lifting dropper (6) is fixed to the top of the falling bracket (7), the falling guide rail (5) is fixedly arranged on the inner side of the vertical frame part of the falling bracket (7), the falling platform (4) is arranged on the falling guide rail (5), and when falling, the falling platform (4) moves vertically along the falling guide rail (5); The tumbling seat simulation system (2) is installed on the falling platform (4) of the falling system (1), and comprises a seat adjuster (8) and a seat, wherein the seat adjuster (8) comprises a seat assembly plate (9), the seat is fixedly arranged on the seat assembly plate (9), and the seat surface of the seat is parallel to the seat assembly plate (9), and before the falling occurs, the seat assembly plate (9) is arranged at 0-90 degrees with the falling platform (4); The seat adjuster (8) further comprises an angle-driven air pressure pump (10) and a rotary hinge (11); The upper surface of the seat assembly plate (9) is provided with T-shaped grooves arranged in a vertical and horizontal manner for longitudinal and transverse installation of the seat; one end of the seat assembly plate (9) is connected to the drop platform (4) through a rotating hinge (11), and the other end is connected to the drop platform (4) through an angle-driven air pressure pump (10); The angle-driven air pressure pump (10) is installed between the seat assembly plate (9) and the drop platform (4) and is used to adjust and fix the angle between the seat and the drop platform (4); The drop buffer system (3) comprises an upper contact buffer plate (12) and a lower contact buffer plate (13), wherein the upper contact buffer plate (12) is fixed to the lower surface of the drop platform (4), and the lower contact buffer plate (13) is fixed to the mounting surface on the lower side of the drop bracket (7).

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