Energy isolation and buffering seat frame

Abstract

The present invention belongs to the field of seats, and specifically relates to an energy-isolating and buffering seat frame. The material of the seat frame is aluminum or aluminum alloy, including a bolted chair back crossbeam, a column, a seat surface crossbeam, a pelvic U-shaped frame and an energy-isolating and buffering device; there are two columns, each of which is provided with an upper fastener, a lower fastener and an energy-isolating and buffering device; the energy-isolating and buffering device includes an energy-isolating box and a partition element, the energy-isolating box is fixedly arranged on the column and is located between the upper fastener and the lower fastener, and the two ends of the partition element are respectively arranged on the upper fastener and the lower fastener, and in an impact environment, the energy of the seat frame and the vehicle body is isolated by the partition element. The present application improves the form of the frame, sets an energy conduction path, and isolates large vertical impacts through the energy isolation device, thereby protecting the safety of the occupants.

Description

Technical Field

[0001] The invention belongs to the field of seats, and in particular relates to an energy-isolating and buffering seat frame. Background Art

[0002] When a mine or improvised explosive device (IED) explodes at the bottom of an armored vehicle, a huge impact load is transmitted to the occupants through the contact interface between the person and the vehicle. At the moment of the explosion, the powerful transient impact force will immediately cause a local effect on the vehicle body, squeezing the occupants' living space, and quickly act on the seats through the vehicle body, and directly transmit to the occupants' bodies through the seats. For a relatively long time in the past, when facing these threats, researchers mainly focused on the protection of the vehicle itself, and regarded preventing the shock wave from penetrating the vehicle as the most important requirement in an explosion incident, while paying little attention to the occupants. With the improvement of vehicle protection levels and survivability, the number of casualties has dropped significantly, but some types of injuries have increased instead. The main reason is that after the rigidity of the vehicle body is increased, although the vehicle body is not penetrated, more of the energy acting on the vehicle body is applied to the occupants.

[0003] At present, the research on protective seats in my country is not yet fully mature. In an explosive impact environment, the safety performance of the seat frame is particularly important, especially the safety performance and layout rationality of the seat frame. The document "Improvement and parameter analysis of seat bottom protection performance under explosive impact", Li Hao et al., Science, Technology and Engineering, 2017, 17(29): 278-285. points out that the layout and installation method of the protective seat frame directly affect the protection performance, and with the overall lightweight requirements, the overall weight limit of the seat is becoming more and more stringent, but at present, if lightweight materials are used, it is difficult to balance between strength and cost. Summary of the invention

[0004] The object of the present invention is to provide an energy-isolating and buffering seat frame.

[0005] The technical solution to achieve the purpose of the present invention is: an energy-isolating and buffering seat frame, the material of the seat frame is aluminum or aluminum alloy, including a seat back crossbeam, a column, a seat surface crossbeam, a pelvic U-shaped frame and an energy-isolating and buffering device connected by bolts;

[0006] There are two pillars, each of which is provided with an upper fastener, a lower fastener and an energy isolation buffer device; the energy isolation buffer device includes an energy isolation box and an isolation element, the energy isolation box is fixedly arranged on the pillar and is located between the upper fastener and the lower fastener, and the two ends of the isolation element are respectively arranged on the upper fastener and the lower fastener. In an impact environment, the isolation of the seat frame and the vehicle body energy is achieved through the isolation element.

[0007] Further, it further includes a cross-shaped support rib plate, and the cross-shaped support rib plate is in an overall "X" shape;

[0008] The upper ends of the two side columns are fastened by a backrest cross beam, and the lower ends are fastened by an overall seat surface skeleton. The middle part is assembled by a cross-shaped support rib plate, and the horizontal rod of the cross-shaped support rib plate is arranged parallel to the backrest cross beam to ensure that the two side columns are parallel to each other.

[0009] Further, the energy isolation buffer device further includes three pin shafts arranged in the energy isolation box. The partition element is a metal strip or metal wire, and the partition element is wound around the three pin shafts. Through the folding and restoration of the metal strip or metal wire, the energy isolation between the seat skeleton and the vehicle body is realized.

[0010] Further, it further includes a docking part. The upper fastener and the lower fastener have the same structure and installation method. The upper fastener and the lower fastener are assembled coaxially with the column, and they can slide freely on the column. The upper fastener and the lower fastener are fixedly connected to the place to be installed through the docking part.

[0011] Further, it further includes two limiting pieces, and the two limiting pieces are detachably connected to the upper fastener and the lower fastener respectively, so as to limit the two ends of the partition element fixed on the upper fastener and the lower fastener.

[0012] Further, it further includes a connecting sleeve, an L-shaped connecting piece and a connecting rod;

[0013] One end of the L-shaped connecting piece is bolted to the column through the connecting sleeve, and the other end of the L-shaped connecting piece is bolted to the pelvic U-shaped frame through the connecting rod.

[0014] Further, one end of the connecting sleeve is a round tube, and the other end is provided with two vertical plates. The round tube is provided with holes and is connected to the column through bolts. The vertical plates are provided with holes and are bolted to the L-shaped connecting piece through bolts.

[0015] Further, one end of the connecting rod is a round tube, and the other end is provided with two vertical plates. The vertical plates are rotatably connected to the L-shaped connecting piece, and the round tube is bolted to the pelvic U-shaped frame.

[0016] Further, it further includes a return spring and a guide sleeve;

[0017] The guide sleeve is a round tube with a limiting ring at one end. The guide sleeve is fixedly sleeved on the outer periphery of the seat surface cross beam. The return spring is sleeved on the round tube part of the guide sleeve and is limited by the limiting ring. One end of the return spring is connected to the L-shaped connecting piece, and the other end is connected to a set of long bolts on the connecting rod, so as to realize the reset of the seat surface skeleton.

[0018] Compared with the prior art, the remarkable advantages of the present invention are:

[0019] 1. This application uses a chair back crossbeam, a cross-type supporting rib plate and an integral seat frame to ensure the parallelism and stability of the columns on both sides. The overall strength and rigidity of the seat are improved through structural design. When the transient impact of the explosion is transmitted from the side wall to the upper fastener and the lower fastener through the docking piece, the two columns can slide smoothly inside it.

[0020] 2. The energy isolation buffer device can be replaced with other existing external energy isolation buffer devices through slight adjustments, and can be arranged on the chair back frame through assembly. The external type is convenient for maintenance and has a simple structure.

[0021] 3. The entire seat frame is made of aluminum alloy except for the stainless steel pillars. The connecting parts are assembled with bolts and rivets, making the overall frame lighter and achieving overall lightweight.

[0022] 4. The seat frame and the backrest frame are connected by an L-shaped connector, which has a simple structure and is easy to maintain. One end of the reset spring is connected to the L-shaped connector and the other end is assembled to the seat frame, so that the seat frame can be folded and reset to save space.

[0023] 5. The frame adopts T-shaped docking parts, the bottom is connected to the side of the vehicle body, the top and bottom are assembled to the upper fasteners and the lower fasteners, and are fastened by pins to achieve quick disassembly and installation. It can be quickly disassembled when needed, quickly adapt to various combat conditions, and make room in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the energy isolating and buffering type seat frame of the present invention.

[0025] Figure 2 It is a front view of the energy isolating and buffering type seat frame of the present invention.

[0026] Figure 3 It is a left view of the energy isolating and buffering type seat frame of the present invention.

[0027] Figure 4 It is a schematic diagram of the column assembly of the present invention.

[0028] Figure 5 It is a schematic diagram of the connection between the limiting plate and the upper fastener of the present invention.

[0029] Figure 6 It is a schematic diagram of the chair seat resetting structure of the present invention.

[0030] Figure 7 It is a schematic diagram of the guide sleeve structure of the present invention.

[0031] Figure 8 It is a schematic diagram of the connecting sleeve structure of the present invention.

[0032] Fig. 9 It is a schematic diagram of the connection of the aluminum alloy chair seat frame of the present invention.

[0033] Fig.10 It is a schematic diagram of a partition and buffer device that can be used for the energy isolation and buffer type seat frame of the present invention.

[0034] Description of reference numerals:

[0035] 1-column, 2-back crossbeam, 3-headrest cover, 4-cross support ribs, 5-limiting plates, 6-upper fasteners, 7-jointing pieces, 8-energy isolation box, 9-isolation element, 10-lower fasteners, 11-connecting sleeves, 12-reset springs, 13-guide sleeves, 14-seat surface crossbeams, 15-L-shaped connectors, 16-connecting rods, 17-pelvic U-shaped frame. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] The purpose of this application is to provide an energy isolation and buffering seat frame, which can isolate transient large impacts from the human body by setting an energy isolation and buffering device under the condition that the frame meets the strength and rigidity requirements. In addition, the frame can realize a quick-release function and can be disassembled and assembled in a short time.

[0038] like Figure 1 As shown, an energy isolating and buffering type seat frame includes a seat back frame, an energy isolating and buffering device and a seat surface frame.

[0039] The chair back frame includes a column 1, a chair back cross beam 2, a headrest cover 3, a cross-type support rib plate 4, an upper fastener 6, a docking piece 7, a lower fastener 10 and a connecting sleeve 11. The upper fastener 6 and the lower fastener 10 are connected to the outside through the docking piece 7. The columns 1 on both sides are fastened to each other through the chair back cross beam 2 and the cross-type support rib plate 4. Figure 4 As shown, the column 1 is assembled with the upper fastener 7 and the lower fastener 10 through coaxial assembly.

[0040] The energy isolation buffer device is arranged on the outer surface of the column 1 through the energy isolation box 8, and is assembled by bolts. The energy isolation box 8 does not move relative to the column 1, and can be replaced by the energy isolation box in the existing energy isolation device. On the other hand, the isolation element 9 in the energy isolation buffer device is arranged on the upper fastener 6 and the lower fastener 10 at both ends, and passes through the energy isolation box 8 in the middle. The isolation element 9 can be made of steel strips or steel wires, and the energy isolation buffer function of the frame and the car body is realized through metal folding and recovery.

[0041] The seat frame includes a pelvic U-shaped frame 17, a connecting guide column 16, an L-shaped connector 15, a guide column 13, a return spring 12 and a seat crossbeam 14. The L-shaped connector 15 is connected to the connecting sleeve 11 by bolts, and is also connected to the connecting guide column 16 by bolts.

[0042] The U-shaped frame 17 of the femoral pelvis realizes the reset function through the reset spring 12. The assembly relationship is as follows: Figure 5 As shown, the reset spring 12 is connected to the seat crossbeam 14 through the guide column 13, the guide column 13 is fixedly assembled on the seat crossbeam 14, one end of the reset spring 12 is connected to the L-shaped connector 15, and the other end is connected to a set of long bolts on the connecting guide column 16, so as to realize the reset function of the seat frame. The seat frame is made of all-aluminum alloy and assembled by bolts, which is light in weight and easy to disassemble and assemble.

[0043] The assembly relationship between the L-shaped connector 15, the connecting guide column 16 and the femoral pelvis U-shaped frame 17 is as follows: Figure 6 As shown, the connecting guide column 16 is connected to the femoral pelvis U-shaped frame 17 by bolts. The connecting guide column 16 is made of aluminum alloy, which reduces weight and is easy to disassemble and assemble while ensuring strength.

[0044] The structure of the isolation element in the energy isolation buffer mechanism is as follows: Figure 7 As shown, the partition element in the figure is a steel belt, which is wound on three pins. The two ends of the steel belt can be installed on the upper fastener 6 and the lower fastener 10. The three pins can be set in the energy isolation box 8 to adapt to the skeleton.

[0045] Working principle or process: When a vehicle encounters an explosive detonation while driving, huge energy will be transferred to the vehicle body in about 5ms, causing the vehicle body to quickly produce a local effect, squeezing the occupant's living space. At the same time, a transient large impact is transmitted along the vehicle body to the docking piece 7, and then transmitted to the upper fastener 6 and the lower fastener 10 through the docking piece 7. Because the partition element 9 is assembled with the upper fastener 6 and the lower fastener 10, the impact is transmitted to the partition element 9. At this time, the energy isolation box 8 and the column 1 move downward relative to the docking piece 7 due to inertia. The energy isolation box 8 quickly moves downward along the partition element 9, causing the partition element 9 to bend and recover quickly, realizing the energy isolation function of the external energy isolation buffer device. When the occupant leaves the seat, the seat surface is quickly reset under the action of the reset spring 12 to realize the reset function. When the seat needs to be disassembled, the entire seat frame can be directly pulled out of the docking piece 7 to achieve quick disassembly and assembly.

Claims

1. An energy isolation and buffering seat frame, characterized in that: The material of the seat frame is aluminum or aluminum alloy, including a backrest cross beam (2), columns (1), a seat surface cross beam (14), a pelvic U-shaped frame (17) and an energy isolation buffer device connected by bolts; There are two columns (1), and each column (1) is provided with an upper fastener (6), a lower fastener (10) and an energy isolation buffer device; the energy isolation buffer device includes an energy isolation box (8) and an isolation element (9). The energy isolation box (8) is fixedly arranged on the column and is located between the upper fastener and the lower fastener. The two ends of the isolation element (9) are respectively arranged on the upper fastener and the lower fastener. In an impact environment, the energy of the seat frame and the vehicle body is isolated through the isolation element (9); It also includes a cross-shaped support rib plate (4), and the cross-shaped support rib plate (4) is in an overall "fork" shape; The upper ends of the two side columns (1) are fastened by the backrest cross beam (2), and the lower ends are fastened by the overall seat surface frame. The middle parts are assembled through the cross-shaped support rib plate (4), and the horizontal rod of the cross-shaped support rib plate (4) is arranged parallel to the backrest cross beam (2) to ensure that the two side columns (1) are parallel to each other; The energy isolation buffer device also includes three pin shafts arranged in the energy isolation box (8). The isolation element (9) is a metal strip or metal wire, and the isolation element (9) is wound around the three pin shafts. Through the folding and restoration of the metal strip or metal wire, the energy isolation between the seat frame and the vehicle body is realized; It also includes a docking part (7). The upper fastener (6) and the lower fastener (10) have the same structure and installation method. The upper fastener (6) and the lower fastener (10) are coaxially assembled with the column (1), and they can slide freely on the column (1). The upper fastener and the lower fastener are fixedly connected to the place to be installed through the docking part (7); It also includes two limit pieces (5), and the two limit pieces (5) are respectively detachably connected to the upper fastener and the lower fastener, so as to limit the two ends of the isolation element (9) fixed on the upper fastener and the lower fastener; It also includes a connecting sleeve (11), an L-shaped connecting piece (15) and a connecting rod (16); One end of the L-shaped connecting piece (15) is bolted to the column (1) through the connecting sleeve (11), and the other end of the L-shaped connecting piece (15) is bolted to the pelvic U-shaped frame (17) through the connecting rod (16).

2. The seat frame according to claim 1, characterized in that: One end of the connecting sleeve (11) is a round tube, and the other end is provided with two vertical plates. The round tube is provided with holes and is connected to the column (1) through bolts. The vertical plates are provided with holes and are bolted to the L-shaped connecting piece (15) through bolts.

3. The seat frame according to claim 2, characterized in that: One end of the connecting rod (16) is a round tube, and the other end is provided with two vertical plates. The vertical plates are rotatably connected to the L-shaped connecting piece, and the round tube is bolted to the pelvic U-shaped frame (17).

4. The seat frame according to claim 3, characterized in that: It also includes a return spring (12) and a guide sleeve (13); The guide sleeve (13) is a round tube with a limit ring at one end. The guide sleeve (13) is fixedly sleeved on the outer periphery of the seat surface cross beam (14). The return spring (12) is sleeved on the round tube part of the guide sleeve (13) and is limited by the limit ring. One end of the return spring (12) is connected to the L-shaped connecting piece (15), and the other end is connected to a set of long bolts on the connecting rod (16), so as to realize the reset of the seat surface frame.

Images