A device for assisting deformation loading in dynamic impact test of seat
By designing an auxiliary deformation loading device with pitch and roll mechanisms, the problems of consistency of pre-deformation direction and stability of loading process in seat dynamic impact tests are solved, achieving uniform load distribution and device versatility, applicable to tests of different seat models.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA AIRPLANT STRENGTH RES INST
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-12
AI Technical Summary
Existing dynamic impact tests for seats make it difficult to achieve consistency in the pre-deformation direction of the floor at the seat leg connection and the smoothness of the deformation loading process, and the loading device is difficult to be compatible with different models of seats.
An auxiliary deformation loading device including a pitching device and a rolling device was designed. The rotational motion is converted into linear displacement through a small-pitch thread. A ball washer is used to ensure spherical contact. The device uses a hinged structure and bolt connection to adapt to different models of seats.
It achieves stable deformation of the seat during the test, uniform load distribution, good compatibility, simple structure and low cost, and easy control and adjustment of the rotation angle.
Smart Images
Figure CN224354049U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of strength testing equipment, and specifically relates to an auxiliary deformation loading device for dynamic impact testing of seats. Background Technology
[0002] Seats play a crucial role in aircraft structure, and their performance directly endangers the lives of occupants. The purpose of seat dynamic impact testing is to evaluate the structural strength of aircraft seats, restraint systems, and related cabin structures, as well as their ability to protect occupants from serious injury in survivable crashes, such as severe head injuries caused by head impact envelope and seat pitch.
[0003] The experiment aims to achieve pre-deformation of the floor at the seat leg connection point by 10° pitch and 10° roll. This requires ensuring different pre-deformation directions at the seat leg connection point while also ensuring a smooth and rapid deformation loading process. Summary of the Invention
[0004] To address the aforementioned problems, this application provides an auxiliary deformation loading device for dynamic impact testing of seats, comprising:
[0005] Pitch device, roll device and base;
[0006] The rolling device includes: a rolling beam, a rolling seat, a double-ended stud, a U-shaped plate, an adjusting nut, and a rolling auxiliary seat;
[0007] The rolling base has support arms at both ends, and the bottom end is fixed to the base. The two ends of the rolling beam are rotatably mounted between the two support arms via a rotating shaft. The bottom end of the rolling beam is connected to one end of a double-ended stud, and the other end of the double-ended stud is connected to a U-shaped plate via an adjusting nut. The U-shaped plate is rotatably hinged between the two ears of the rolling auxiliary base. The U-shaped plate provides the rotational freedom of the double-ended stud. Rotating the adjusting nut adjusts the screw advance of the double-ended stud, thereby adjusting the angle of the rolling beam relative to the rolling base.
[0008] The pitch device includes: pitch beam, pitch seat, descent seat, connecting rod, pitch lifting seat, and height adjusting nut;
[0009] The pitch seat is fixed on the base. One end of the pitch beam is hinged to the pitch seat, and the other end is fixedly connected to the descent seat. The lower end of the connecting rod is hinged to the pitch lifting seat, and the upper end passes through the through hole of the descent seat and is connected to the height adjusting nut. Adjusting the amount of screwing in the height adjusting nut adjusts the height of the descent seat, thereby adjusting the pitch angle of the pitch seat.
[0010] Preferably, the lowering seat has a bend in the middle to accommodate different pitch angles when mounted upright or in reverse.
[0011] Preferably, the pitch beam has multiple pin holes at the end away from the hinge point, and the pitch seat has multiple matching pin holes for fixing the pitch beam at different positions.
[0012] Preferably, the base includes two support beams and a transition plate mounted on the two support beams.
[0013] Preferably, the swivel base has multiple mounting holes for connection with the seat.
[0014] Preferably, the tilt seat has multiple mounting holes for connection with the seat.
[0015] The advantages of this application include:
[0016] a) The loading device uses a small-pitch thread to convert rotational motion into linear displacement, reducing the difficulty of loading and enabling the seat to deform stably;
[0017] b) The rolling device is designed with special ball pads to ensure spherical contact during deformation, thus making the load uniform;
[0018] c) The pitch device uses a hinged structure to ensure that the position follows the deformation process;
[0019] d) Bolted connections are used, which are compatible with different models of seats and experiments, and have good versatility;
[0020] e) The structure is simple and convenient to design, low in cost, and the rotation angle is easy to control and adjust. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the installation of the auxiliary deformation loading device according to a preferred embodiment of this application;
[0022] Figure 2 This is a schematic diagram illustrating the deformation principle of the rolling device according to a preferred embodiment of this application;
[0023] Figure 3 This application presents a preferred embodiment of the pitch device deformation principle and model.
[0024] Figure 4 This is a schematic diagram of a preferred embodiment of the pitch assist device of this application. Detailed Implementation
[0025] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.
[0026] like Figures 1-4 As shown, this application provides an auxiliary deformation loading device for dynamic impact testing of seats, comprising:
[0027] Pitch device 1, roll device 2 and base;
[0028] The rolling device 2 includes: a rolling beam 21, a rolling seat 22, a double-headed stud 23, a U-shaped plate 24, an adjusting nut 25, and a rolling auxiliary seat 5;
[0029] The rolling seat 22 has support arms at both ends and is fixed to the base at the bottom. The rolling beam 21 is rotatably mounted between the two support arms via a pivot. The bottom end of the rolling beam 21 is connected to one end of the double-ended stud 23. The other end of the double-ended stud 23 is connected to the U-shaped plate 24 via an adjusting nut 25. The U-shaped plate 24 is rotatably hinged between the two ears of the rolling auxiliary seat 5. The U-shaped plate 24 provides the rotational freedom of the double-ended stud 23. By rotating the adjusting nut 25, the screw advance of the double-ended stud 23 is adjusted, thereby adjusting the angle of the rolling beam 21 relative to the rolling seat 22. This allows the rolling beam to rotate ±10° around the rotation axis of the rolling seat, and the auxiliary seat floor to roll and deform ±10°.
[0030] The pitch device 1 includes: a pitch beam 15, a pitch seat 14, a descent seat 11, a connecting rod 13, a pitch lifting seat 6, and a height adjusting nut 12;
[0031] The pitch seat 14 is fixed to the base. One end of the pitch beam 15 is hinged to the pitch seat 14, and the other end is fixedly connected to the lowering seat 11. The lower end of the connecting rod 13 is hinged to the pitch lifting seat 6, and the upper end passes through the through hole of the lowering seat 11 and is connected to the height adjusting nut 12. Adjusting the screwing amount of the height adjusting nut 12 adjusts the height of the lowering seat 11, thereby adjusting the pitch angle of the pitch seat 14. This allows the pitch beam to rotate ±10° around the rotation axis of the pitch seat to accommodate ±10° pitch deformation of the seat floor.
[0032] A ball washer is provided at the connection of the double-ended stud.
[0033] Preferably, the lowering seat 11 has a bend in the middle to accommodate different pitch angles when mounted upright or in reverse.
[0034] Preferably, the pitch beam 15 has multiple pin holes at the end away from the hinge point, and the pitch seat 14 has multiple pin holes that are adapted to it for fixing the pitch beam 15 at different positions.
[0035] Preferably, the base includes two support beams and a transition plate 3 mounted on the two support beams.
[0036] Preferably, the pitch seat 14 and roll seat 22 have multiple mounting holes for connecting to the seat.
[0037] When using this application, part of the test specimen seat is fixed to the pitch device 1 and part of it is fixed to the roll device 2. The angle between the pitch device 1 and the roll device 2 is adjusted to apply a load to the seat.
[0038] The advantages of this application include: a) the loading device uses a small-pitch thread to convert rotational motion into linear displacement, reducing loading difficulty and ensuring stable deformation of the seat; b) the rolling device is designed with a special ball pad to ensure spherical contact during deformation, resulting in uniform load; c) the pitch device uses a hinged structure to ensure positional tracking during deformation; d) the bolted connection allows for compatibility with different seat models and experiments, providing good versatility; e) the structure is simple and convenient to design, low in cost, and the rotation angle is easy to control and adjust.
[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An auxiliary deformation loading device for dynamic impact testing of seats, characterized in that, include: Pitch device (1), roll device (2) and base; The rolling device (2) includes: a rolling beam (21), a rolling seat (22), a double-headed stud (23), a U-shaped plate (24), an adjusting nut (25), and a rolling auxiliary seat (5); The rolling seat (22) has support arms at both ends and the bottom end is fixed on the base. The two ends of the rolling beam (21) are rotatably installed between the two support arms through the rotating shaft. The bottom end of the rolling beam (21) is connected to one end of the double-headed stud (23). The other end of the double-headed stud (23) is connected to the U-shaped plate (24) through the adjusting nut (25). The U-shaped plate (24) is rotatably hinged between the two ears of the rolling auxiliary seat (5). The pitch device (1) includes: a pitch beam (15), a pitch seat (14), a descent seat (11), a connecting rod (13), a pitch lifting seat (6), and a height adjusting nut (12); The pitch seat (14) is fixed on the base. One end of the pitch beam (15) is hinged to the pitch seat (14), and the other end is fixedly connected to the descent seat (11). The lower end of the connecting rod (13) is hinged to the pitch lifting seat (6), and the upper end passes through the through hole of the descent seat (11) and is connected to the height adjusting nut (12).
2. The auxiliary deformation loading device for dynamic impact testing of seats as described in claim 1, characterized in that, The lowering seat (11) has a bend in the middle to accommodate different pitch angles when mounted upright or in reverse.
3. The auxiliary deformation loading device for dynamic impact testing of seats as described in claim 1, characterized in that, The pitch beam (15) has multiple pin holes at the end away from the hinge point, and the pitch seat (14) has multiple pin holes that are adapted to it for fixing the pitch beam (15) at different positions.
4. The auxiliary deformation loading device for dynamic impact testing of seats as described in claim 1, characterized in that, The base includes two support beams and a transition plate (3) mounted on the two support beams.
5. The auxiliary deformation loading device for dynamic impact testing of a seat as described in claim 1, characterized in that, The swivel base (22) has multiple mounting holes for connecting to the seat.
6. The auxiliary deformation loading device for dynamic impact testing of a seat as described in claim 1, characterized in that, The pitch seat (14) has multiple mounting holes for connecting to the seat.