Zero-gravity seat framework rapid energy absorption return device and vehicle

Abstract

The invention provides a zero-gravity seat framework rapid energy absorption return device and a vehicle, belongs to the technical field of vehicles, and solves the problems of complex structure, complex assembly operation and high cost caused by the fact that a friction disc is adopted for energy absorption in an existing return mechanism. Wherein the angle adjusting motor drives the angle adjusting device connecting plate to rotate through the angle adjusting device, the angle adjusting device connecting plate is fixedly connected with one end of the center shaft, the other end of the center shaft is connected with the hook lock assembly, the center shaft penetrates through the reset connecting rod, and when the hook lock assembly is in a locked state, the relative position of the center shaft and the reset connecting rod is fixed; when the hook lock is in an unlocking state, the reset connecting rod rotates relative to the center shaft, one end of the front connecting rod is rotationally connected with the reset connecting rod, the other end of the front connecting rod is rotationally connected with the seat bottom frame structure, and the energy-absorbing friction ring fixedly sleeves the center shaft and is located between the center shaft and the reset connecting rod. The energy-absorbing seat can absorb energy when the seat returns, and is simple in structure and low in cost.

Description

Technical Field

[0001] This invention belongs to the field of vehicle technology, and in particular relates to a zero-gravity seat frame rapid energy absorption and return device and a vehicle. Background Technology

[0002] When using a zero-gravity seat, passengers can adjust the seat back to rotate backward and the seat cushion support near the feet to rotate upward, allowing them to recline and enjoy a more comfortable seating position. However, due to the large angle between the backrest and seat cushion, the seatbelt adjustment range is limited. In an emergency, the seatbelt's restraint may not be sufficient to fully protect the occupant, posing a safety hazard. To improve occupant safety, in the event of a collision, if the seat is in a zero-gravity position, the seat controller activates a rapid energy-absorbing and returning mechanism to the standard position, deploying the seat cushion airbag and tightening the seatbelt. In the prior art, patent application CN117429327B discloses a zero-gravity seat with a rapid return mechanism and its rapid return method, which uses a friction disc for energy absorption. However, the friction disc is not only complex in structure, heavy, and occupies a lot of space, but also uses a laser welding structure, which requires the shaft and the friction disc to be welded into a component first. This affects the subsequent welding sequence and requires two connecting plates to be welded in layers, resulting in complicated assembly operations, which are time-consuming, labor-intensive, and costly. Summary of the Invention

[0003] In view of this, in order to solve the problems of the friction disc used for energy absorption in the existing return mechanism, which is not only complex in structure, heavy in weight, and occupies a lot of space, but also causes complicated assembly operations, which are time-consuming, labor-intensive and costly, this invention proposes a zero-gravity seat frame rapid energy absorption and return device and vehicle.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A zero-gravity seat frame rapid energy absorption and return device includes: a bottom support structure, a seat base frame structure, an angle adjustment motor, and an angle adjustment assembly. The angle adjustment assembly includes an angle adjuster, an angle adjuster connecting plate, a reset link, a central shaft, a front link, a hook lock assembly, and an energy-absorbing friction ring. The angle adjustment motor is fixedly mounted on the bottom support structure. The angle adjustment motor drives the angle adjuster connecting plate to rotate through the angle adjuster. The angle adjuster connecting plate is fixedly connected to one end of the central shaft, and the other end of the central shaft is connected to the hook lock assembly. The central shaft passes through the reset link. The hook lock assembly has a locked state and an unlocked state. When the hook lock assembly is in the locked state, the relative position of the central shaft and the reset link is fixed. When the hook lock is in the unlocked state, the reset link can rotate relative to the central shaft. One end of the front link is rotatably connected to the reset link, and the other end is rotatably connected to one end of the seat base frame structure. The other end of the seat base frame structure is rotatably mounted on the bottom support structure. The energy-absorbing friction ring is fixedly sleeved on the central shaft and located between the central shaft and the reset link.

[0005] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the outer wall of the energy-absorbing friction ring is fixed with a plurality of evenly distributed protrusions.

[0006] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the cross-section of the protrusion is arc-shaped.

[0007] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the energy-absorbing friction ring is interference-fitted with the reset link.

[0008] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the outer wall of the central shaft is provided with a mounting groove, and the energy-absorbing friction ring is fixedly embedded in the mounting groove, with the two ends of the energy-absorbing friction ring respectively abutting against the two inner walls of the mounting groove.

[0009] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the hook-lock assembly includes an ignition device, a brake line, a cam, a hook lock, and a toothed plate. The toothed plate is fixedly connected to the central shaft, and the hook lock is rotatably connected to the reset linkage. One end of the cam is rotatably mounted on the reset linkage, having a first position and a second position. The ignition device is connected to the other end of the cam via the brake line. When the cam is in the first position, the first abutting part of the cam abuts against the hook lock, causing the hook lock to engage with the toothed plate. When the cam is in the second position, the second abutting part of the cam abuts against the hook lock, causing the hook lock to separate from the toothed plate.

[0010] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the hook-lock assembly further includes a cover, which is connected to the reset link by bolts. A cam is located inside the cover, and a sliding column is fixedly provided on the cam. The cover is provided with a guide groove, and the sliding column slides through the guide groove.

[0011] As a preferred embodiment of the aforementioned zero-gravity seat frame rapid energy absorption and return device, the zero-gravity seat frame rapid energy absorption and return device further includes a synchronizing rod, and the number of angle adjustment components is two. The two ends of the synchronizing rod are respectively fixedly connected to the angle adjusters in the two angle adjustment components, and the two angle adjustment components are respectively located on both sides of the seat bottom frame structure.

[0012] The present invention also provides a vehicle including the above-described zero-gravity seat frame rapid energy absorption and return device.

[0013] As a preferred embodiment of the aforementioned vehicle, the vehicle further includes a seat back support and a backrest angle adjustment structure. The seat back support is rotatably connected to the seat base frame structure, and the backrest angle adjustment structure is used to adjust the angle between the seat back support and the seat base frame structure.

[0014] Compared with existing technologies, the beneficial effects of the zero-gravity seat frame rapid energy absorption and return device and the vehicle provided by this invention are: (1) Lightweight: The structure of the energy-absorbing friction ring is simple and its weight is greatly reduced.

[0015] (2) It is conducive to space optimization: the external dimensions of the energy-absorbing friction ring are very small, occupying little space, leaving more usable space.

[0016] (3) Assembly process optimization: The angle adjuster connecting plate is welded to the central shaft, and then the angle adjuster is welded to the angle adjuster connecting plate. The energy-absorbing friction ring is first assembled with the central shaft, and then embedded together with the reset link. The assembly is simpler and faster, saving time and effort.

[0017] (4) Low cost. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the energy-absorbing friction ring, central shaft, reset linkage, toothed plate, and angle adjuster connecting plate of the zero-gravity seat frame rapid energy-absorbing and returning device provided in a specific embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the zero-gravity seat frame rapid energy absorption and return device provided in a specific embodiment of the present invention; Figure 3 This is an exploded view of a portion of the structure of the zero-gravity seat frame rapid energy absorption and repositioning device provided in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the hook and lock assembly of the zero-gravity seat frame rapid energy absorption and return device provided in a specific embodiment of the present invention; Figure 5 This is an exploded view of the hook and lock assembly of the zero-gravity seat frame rapid energy absorption and return device provided in a specific embodiment of the present invention; Figure 6 This is an assembly diagram of the zero-gravity seat frame rapid energy absorption and return device and the seat back support provided in a specific embodiment of the present invention.

[0019] In the picture: 1. Bottom support structure; 2. Seat base frame structure; 3. Angle-adjusting motor; 4. Angle adjustment assembly; 41. Angle adjuster; 42. Angle adjuster connecting plate; 43. Reset linkage; 44. Central shaft; 45. Front linkage; 46. Hook and lock assembly; 47. Energy-absorbing friction ring; 461. Ignition device; 462. Brake cable; 463. Cam; 464. Hook and lock; 465. Tooth plate; 466. Cover; 4631. Sliding column; 5. Synchronizing rod; 6. Seat back support. Detailed Implementation The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0020] 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.

[0021] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0023] See also Figure 1-6 This invention provides a rapid energy-absorbing and repositioning device for a zero-gravity seat frame. The device includes a bottom support structure 1, a seat base frame structure 2, an angle-adjusting motor 3, and an angle adjustment assembly 4. The angle adjustment assembly 4 includes an angle adjuster 41, an angle adjuster connecting plate 42, a reset link 43, a central shaft 44, a front link 45, a hook-lock assembly 46, and an energy-absorbing friction ring 47. The angle-adjusting motor 3 is fixedly mounted on the bottom support structure 1. The motor drives the angle adjuster connecting plate 42 to rotate via the angle adjuster 41. The angle adjuster connecting plate 42 is fixedly connected to one end of the central shaft 44. The other end is connected to the hook lock assembly 46, and the central shaft 44 passes through the reset link 43. The hook lock assembly 46 has a locked state and an unlocked state. When the hook lock assembly 46 is in the locked state, the relative position of the central shaft 44 and the reset link 43 is fixed. When the hook lock 464 is in the unlocked state, the reset link 43 can rotate relative to the central shaft 44. One end of the front link 45 is rotatably connected to the reset link 43, and the other end is rotatably connected to one end of the seat bottom frame structure 2. The other end of the seat bottom frame structure 2 is rotatably set on the bottom support structure 1. The energy-absorbing friction ring 47 is fixedly sleeved on the central shaft 44 and is located between the central shaft 44 and the reset link 43.

[0024] In this zero-gravity seat frame rapid energy absorption and return device, the seat base frame structure 2 supports the seat cushion. When the seat needs to be adjusted from a normal sitting position to a zero-gravity reclining position, the angle adjustment motor 3 drives the angle adjuster 41 to rotate the angle adjuster connecting plate 42. At this time, the hook lock assembly 46 is in a locked state, and the relative position of the central shaft 44 and the reset link 43 is locked. The angle adjuster connecting plate 42 drives the reset link 43 to rotate through the central shaft 44. The reset link 43 drives the front link 45 to rotate, and the front link 45 drives the seat base frame structure 2 to rotate, thereby realizing that the end of the seat cushion closest to the occupant's feet rotates upward. When the vehicle is involved in a collision, the seat needs to return from the zero-gravity reclining position to the normal sitting position, which means that the end of the seat cushion closest to the occupant's feet needs to rotate downward. At this time, the hook lock assembly 46 is in the unlocked state, and the reset link 43 can rotate relative to the central axis 44. Under the action of the occupant's weight and the vehicle's forward momentum, the end of the seat bottom frame structure 2 near the occupant's feet rotates downward. Through the front link 45, the reset link 43 is driven to rotate relative to the central axis 44. At this time, the energy-absorbing friction ring 47 between the reset link 43 and the central axis 44 plays the role of energy absorption. While the seat returns to its original position, it absorbs part of the collision energy, reduces the impact of the impact inertia on the occupant, and ensures that the vehicle's passive safety devices can play a perfect role.

[0025] Compared to the existing technology that uses friction discs for energy absorption, this zero-gravity seat frame rapid energy absorption and return device uses an energy-absorbing friction ring 47 for energy absorption, which achieves lightweighting: the structure of the energy-absorbing friction ring 47 is simple, and its weight is greatly reduced; it also facilitates space optimization: the external dimensions of the energy-absorbing friction ring 47 are very small, occupying little space and leaving more usable space; the assembly process is optimized: the angle adjuster connecting plate 42 is welded to the central shaft 44, and then the angle adjuster 41 is welded to the angle adjuster connecting plate 42. The energy-absorbing friction ring 47 is first assembled with the central shaft 44, and then they are embedded together into the reset connecting rod 43, making the assembly simpler and faster, saving time and effort; and the cost is low.

[0026] Optionally, a plurality of evenly distributed protrusions are fixed on the outer wall of the energy-absorbing friction ring 47.

[0027] In this embodiment, the cross-section of the protrusion is arc-shaped. Multiple protrusions are arranged in two rows along the axial direction of the energy-absorbing friction ring 47, with each row of protrusions evenly distributed along the circumference of the energy-absorbing friction ring 47.

[0028] Optionally, the energy-absorbing friction ring 47 is interference-fitted with the reset link 43.

[0029] Optionally, the outer wall of the central shaft 44 is provided with a mounting groove, and the energy-absorbing friction ring 47 is fixedly embedded in the mounting groove, with both ends of the energy-absorbing friction ring 47 abutting against the two inner walls of the mounting groove respectively. The mounting groove can limit the position of the energy-absorbing friction ring 47.

[0030] like Figure 4 and Figure 5 As shown, optionally, the hook lock assembly 46 includes a detonator 461, a brake line 462, a cam 463, a hook lock 464, and a toothed plate 465. The toothed plate 465 is fixedly connected to the central shaft 44, and the hook lock 464 is rotatably connected to the reset link 43. One end of the cam 463 is rotatably disposed on the reset link 43 and has a first position and a second position. The detonator 461 is connected to the other end of the cam 463 through the brake line 462. When the cam 463 is in the first position, the cam 463 abuts against the first abutting part of the hook lock 464, causing the hook lock 464 to engage with the toothed plate 465. When the cam 463 is in the second position, the cam 463 abuts against the second abutting part of the hook lock 464, causing the hook lock 464 to separate from the toothed plate 465.

[0031] When the hook lock assembly 46 needs to be unlocked, the detonator 461 operates, driving the cam 463 to rotate from the first position to the second position via the brake cable 462. The cam 463 abuts against the second abutment part, driving the hook lock 464 to rotate, causing the hook lock 464 to separate from the toothed plate 465. At this time, the relative position of the reset link 43 and the central shaft 44 is unlocked.

[0032] like Figure 5 As shown, optionally, the hook-lock assembly 46 further includes a cover 466, which is bolted to the reset link 43. A cam 463 is located inside the cover 466, and a sliding post 4631 is fixedly mounted on the cam 463. The cover 466 has a guide groove, through which the sliding post 4631 slides. The guide groove guides and limits the rotation of the cam 463.

[0033] Optionally, the zero-gravity seat frame rapid energy absorption and return device further includes a synchronizing rod 5. There are two angle adjustment components 4, with each end of the synchronizing rod 5 fixedly connected to an angle adjuster 41 in one of the two angle adjustment components 4. The two angle adjustment components 4 are located on opposite sides of the seat base frame structure 2. The synchronizing rod 5 enables both angle adjusters 41 in the two angle adjustment components 4 located on opposite sides of the seat base frame structure 2 to be driven by the angle adjustment motor 3.

[0034] The present invention also provides a vehicle that includes the above-described zero-gravity seat frame rapid energy absorption and return device.

[0035] like Figure 6 As shown, the vehicle also includes a seat back support 6 and a backrest angle adjustment structure. The seat back support 6 is rotatably connected to the seat bottom frame structure 2, and the backrest angle adjustment structure is used to adjust the angle between the seat back support 6 and the seat bottom frame structure 2.

[0036] When a vehicle collision occurs, the seat controller confirms the current seat posture. When the seat controller detects that the seat is in a standard posture, the zero-gravity seat frame rapid energy absorption and return device does not activate, ensuring the torque strength of the zero-gravity seat frame rapid energy absorption and return device. When the seat controller detects that the seat is in a zero-gravity posture, the seat controller controls the zero-gravity seat frame rapid energy absorption and return device to activate, absorb energy and quickly return to the standard posture, and ignite the seat cushion airbag and seat belt to deploy and tighten.

[0037] The zero-gravity seat frame's rapid energy absorption and return device is activated, detonating the detonator 461. The detonator 461 pulls the cam 463 to rotate via the brake cable 462. After the cam 463 rotates, it strikes the second abutment part of the hook lock 464, causing the hook lock 464 to rotate and separate from the toothed plate 465, thus unlocking. After unlocking, the reset link 43 rotates around the central axis 44. The energy-absorbing friction ring 47 set between the reset link 43 and the central axis 44 can increase the rotational torque and absorb energy during the reset process, reducing the impact of the impact inertia on the occupant.

[0038] Obviously, the above-disclosed embodiments of the present invention are merely illustrative of the invention. The embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. It is neither necessary nor possible to exhaustively describe all embodiments herein.

Claims

1. A rapid energy-absorbing and repositioning device for a zero-gravity seat frame, characterized in that, include: The structure includes a bottom support structure (1), a seat frame structure (2), an angle adjustment motor (3), and an angle adjustment assembly (4). The angle adjustment assembly (4) includes an angle adjuster (41), an angle adjuster connecting plate (42), a reset link (43), a central shaft (44), a front link (45), a hook lock assembly (46), and an energy-absorbing friction ring (47). The angle adjustment motor (3) is fixedly installed on the bottom support structure (1). The angle adjustment motor (3) drives the angle adjuster connecting plate (42) to rotate through the angle adjuster (41). The angle adjuster connecting plate (42) is fixedly connected to one end of the central shaft (44), and the other end of the central shaft (44) is connected to the hook lock assembly (46). The central shaft (44) passes through... The hook lock assembly (46) has a locked state and an unlocked state. When the hook lock assembly (46) is in the locked state, the relative position of the central shaft (44) and the reset link (43) is fixed. When the hook lock (464) is in the unlocked state, the reset link (43) can rotate relative to the central shaft (44). One end of the front link (45) is rotatably connected to the reset link (43), and the other end is rotatably connected to one end of the seat bottom frame structure (2). The other end of the seat bottom frame structure (2) is rotatably set on the bottom support structure (1). The energy-absorbing friction ring (47) is fixedly sleeved on the central shaft (44) and located between the central shaft (44) and the reset link (43).

2. The zero-gravity seat frame rapid energy absorption and return device according to claim 1, characterized in that: The outer wall of the energy-absorbing friction ring (47) is fixed with a plurality of evenly distributed protrusions.

3. The zero-gravity seat frame rapid energy absorption and return device according to claim 2, characterized in that: The cross-section of the protrusion is circular.

4. The zero-gravity seat frame rapid energy absorption and return device according to claim 1, characterized in that: The energy-absorbing friction ring (47) is interference-fitted with the reset link (43).

5. The zero-gravity seat frame rapid energy absorption and return device according to claim 1, characterized in that: The outer wall of the central shaft (44) is provided with an installation groove, and the energy-absorbing friction ring (47) is fixedly embedded in the installation groove. The two ends of the energy-absorbing friction ring (47) abut against the two inner walls of the installation groove respectively.

6. The zero-gravity seat frame rapid energy absorption and return device according to claim 1, characterized in that: The hook-lock assembly (46) includes an igniter (461), a brake line (462), a cam (463), a hook lock (464), and a toothed plate (465). The toothed plate (465) is fixedly connected to the central shaft (44), and the hook lock (464) is rotatably connected to the reset link (43). One end of the cam (463) is rotatably mounted on the reset link (43) and has a first position and a second position. The igniter (461) is connected to the other end of the cam (463) through the brake line (462). When the cam (463) is in the first position, the first abutting part of the cam (463) abuts against the hook lock (464) to engage the hook lock (464) with the toothed plate (465). When the cam (463) is in the second position, the second abutting part of the cam (463) abuts against the hook lock (464) to separate the hook lock (464) from the toothed plate (465).

7. The zero-gravity seat frame rapid energy absorption and return device according to claim 6, characterized in that: The hook lock assembly (46) also includes a cover (466), which is connected to the reset link (43) by bolts. The cam (463) is located inside the cover (466), and a sliding post (4631) is fixedly provided on the cam (463). The cover (466) is provided with a guide groove, and the sliding post (4631) slides through the guide groove.

8. The zero-gravity seat frame rapid energy absorption and return device according to claim 1, characterized in that: It also includes a synchronizing rod (5), and there are two angle adjustment components (4). The two ends of the synchronizing rod (5) are respectively fixedly connected to the angle adjusters (41) in the two angle adjustment components (4). The two angle adjustment components (4) are located on both sides of the seat bottom frame structure (2).

9. A vehicle, characterized in that: Includes the zero-gravity seat frame rapid energy absorption and return device as described in any one of claims 1-8.

10. The vehicle according to claim 9, characterized in that: The vehicle also includes a seat back support (6) and a backrest angle adjustment structure. The seat back support (6) is rotatably connected to the seat bottom frame structure (2). The backrest angle adjustment structure is used to adjust the angle between the seat back support (6) and the seat bottom frame structure (2).

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