Zero-gravity seat basin collision energy absorption locking mechanism

Abstract

The utility model relates to a zero-gravity seat basin collision energy absorption locking mechanism which comprises a seat cushion framework, and two seat cushion energy absorption locking mechanisms used for quickly returning a seat cushion are symmetrically installed on the seat cushion framework. The seat cushion energy absorption locking mechanism comprises an unlocking support rotationally connected with the seat basin through a connecting rod supporting arm, a rotating support meshed with the unlocking support through teeth, a cam locking piece driving the rotating support to be separated from the unlocking support, an exploder driving the cam locking piece to rotate for unlocking and a pull wire connecting the exploder and the cam locking piece. The energy absorption friction disc is used for unlocking after a vehicle is collided, and the limiting mechanism is used for preventing the unlocking support from reversely rotating due to inertia force. The utility model has the advantages that the restraint protection on passengers is improved, and the injury caused by collision is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a zero-gravity seat basin collision energy absorption locking mechanism. Background Art

[0002] Today's zero-gravity seats are innovative comfort seats. When using zero-gravity seats, passengers can adjust the seat back and seat pan to achieve a wide-angle reclining position, which provides a more comfortable sitting position. However, due to the large backrest angle of zero-gravity seats, passengers are in a flat position, and the adjustment range of the seat belt is limited. In an emergency, the restraint force of the seat belt on the body is not enough to fully protect the passengers, which poses a safety hazard. There is an urgent need for a seat pan collision energy absorption locking mechanism that can quickly return the seat pan to its original position when a vehicle collision occurs. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a zero-gravity chair seat bowl collision energy absorption locking mechanism for the seat bowl to quickly return to its original position and absorb energy, so as to overcome the deficiencies of the above-mentioned prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A zero-gravity seat pan collision energy absorption locking mechanism comprises: a seat cushion frame, on which two seat cushion energy absorption locking mechanisms for rapid seat cushion return are symmetrically mounted, and the seat cushion energy absorption locking mechanism comprises: an unlocking bracket rotatably connected to the seat pan through a connecting rod support arm, a rotating bracket meshed with the unlocking bracket through teeth, a cam locking plate driving the rotating bracket to separate from the unlocking bracket, a detonator driving the cam locking plate to rotate and unlock, a pull line connecting the detonator and the cam locking plate, an energy absorption friction disc for unlocking after a vehicle collision, and a limiting mechanism for preventing the unlocking bracket from rotating in the opposite direction due to inertia force;

[0006] The detonator pulls the lock tongue on the cam lock plate through the pull wire to overcome the pulling force of the spring and rotates. After the lock tongue contacts the groove of the rotating bracket, it drives the rotating bracket to rotate, so that the teeth on the rotating bracket are separated from the teeth on the unlocking bracket and the unlocking bracket is unlocked. The unlocking bracket is connected to the synchronous cross tube through an energy-absorbing friction disk. One side of the energy-absorbing friction disk is fixedly connected to the synchronous cross tube of the seat frame, and the other side is fixedly connected to the unlocking bracket. After the vehicle collides, the energy-absorbing friction disk is unlocked and the unlocking bracket rotates freely, so that the connecting rod support arm connected to the unlocking bracket drives the seat basin to quickly fall back to the initial position.

[0007] The limiting mechanism includes: a ratchet pawl mechanism or a lock pin spring locking mechanism.

[0008] As a preferred embodiment of the present invention, the ratchet and pawl mechanism comprises: a ratchet, a pawl meshing with the ratchet, the ratchet is mounted on an unlocking bracket and is coaxially sleeved on a synchronous cross tube with the unlocking bracket, the pawl is hinged on a cushion frame close to the ratchet, and the pawl is used to limit the rotation of the ratchet in the opposite direction of unlocking of the unlocking bracket;

[0009] As a preferred embodiment of the utility model, the lock pin spring locking mechanism includes: a lock block installed on the unlocking bracket, a lock frame installed on the synchronous cross tube, a lock pin installed on the lock frame, an avoidance lock hole opened on the side of the lock frame, and a holding spring for holding the lock pin, the lock pin is pressed against the end face of the lock block by the holding spring, before the seat cushion collides, the lock block, the holding spring and the lock pin move together, after the seat cushion collides, the lock block rotates with the energy absorbing friction disk, the lock pin is pressed into the locking groove of the lock block by the holding spring, and the lock pin blocks the energy absorbing friction disk from rotating by inertia.

[0010] As a preferred embodiment of the utility model, the energy-absorbing friction disc comprises: friction disc housings on both sides, a trigger damping plate rotatably connected to the inside of the friction disc housing, and a core shaft connecting the friction disc housing and the trigger damping plate, wherein the arc-shaped wavy surfaces on both sides of the trigger damping plate correspond to the shapes of the inner walls of the friction disc housings on both sides, wherein the trigger damping plate is disposable, and a new energy-absorbing friction disc or trigger damping plate is required after each destruction.

[0011] As a preferred embodiment of the present invention, the spring is a coil spring sleeved on the rotating shaft of the cam locking plate, or a tension spring that pulls the cam locking plate.

[0012] The advantages and positive effects of the utility model are:

[0013] 1. The utility model uses the seat cushion energy absorption locking mechanism to enable the seat cushion to quickly return to its original position when the seat collides in a zero-gravity position, thereby improving the restraint protection for the occupants and reducing the damage caused by the collision.

[0014] 2. The energy-absorbing locking mechanism of the seat cushion of the utility model is equipped with a limit mechanism for reverse locking. After the seat returns to the designed position, the energy-absorbing locking mechanism of the seat cushion can be reversely locked, greatly reducing the damage to the occupants caused by the inertia after the seat has a large-angle collision. The seat posture is optimized to improve the restraint protection of the occupants.

[0015] 3. The utility model uses the energy-absorbing friction disk to make the seat cushion return to a suitable angle along a predetermined route, and can effectively offset the buffering effect by triggering the damping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the seat in the utility model.

[0017] Figure 2It is a zero-gravity posture diagram of the seat cushion in the utility model.

[0018] Figure 3 It is a partial schematic diagram of the rotation of the seat cushion in the utility model.

[0019] Figure 4 It is a partial schematic diagram of the detonation position in the utility model.

[0020] Figure 5 It is an exploded view of the seat cushion energy absorption locking mechanism in the utility model.

[0021] Figure 6 It is a schematic diagram of the locking mechanism before unlocking in the utility model.

[0022] Figure 7 It is a schematic diagram of the locking mechanism after unlocking in the utility model.

[0023] Figure 8 It is a schematic diagram of the working of the ratchet pawl in the utility model.

[0024] Fig. 9 It is a schematic diagram of the energy absorbing friction disc in the utility model.

[0025] Fig.10 It is an exploded view of the energy absorbing friction disc in the utility model.

[0026] Fig.11 It is a schematic diagram of the locking mechanism of the locking pin spring before unlocking in the utility model.

[0027] Fig.12 It is a schematic diagram of the locking mechanism of the lock pin spring after unlocking in the utility model.

[0028] Figure numerals: seat cushion frame 1, connecting rod support arm 2, seat basin 3, unlocking bracket 4, rotating bracket 5, cam locking plate 6, detonator 7, pull wire 8, energy absorbing friction disc 9, lock tongue 10, synchronous cross tube 11, return spring 12, ratchet 13, pawl 14, locking block 15, lock frame 16, locking pin 17, holding spring 18, friction disc housing 19, trigger damping plate 20, core shaft 21, seat cushion energy absorption locking mechanism 22. DETAILED DESCRIPTION

[0029] See also Figure 1-12The present embodiment provides a zero-gravity seat pan collision energy absorption locking mechanism, comprising: a seat cushion frame 1, on which two seat cushion energy absorption locking mechanisms 22 for quick seat cushion return are symmetrically mounted, the seat cushion energy absorption locking mechanism 22 comprising: an unlocking bracket 4 rotatably connected to the seat pan 3 through a connecting rod support arm 2, a rotating bracket 5 meshing with the unlocking bracket 4 through teeth, a cam locking plate 6 driving the rotating bracket 5 to separate from the unlocking bracket 4, a detonator 7 driving the cam locking plate 6 to rotate and unlock, a pull wire 8 connecting the detonator 7 and the cam locking plate 6, and a locking plate 6 for a vehicle The energy-absorbing friction disc 9 unlocked after the collision, and the limit mechanism for preventing the unlocking bracket 4 from rotating in the opposite direction due to the inertia force; the detonator 7 pulls the lock tongue 10 on the cam locking plate 6 through the pull wire 8 to overcome the pulling force of the return spring 12 to rotate, and the lock tongue 10 contacts the groove of the rotating bracket 5 and drives the rotating bracket 5 to rotate, so that the teeth on the rotating bracket 5 are separated from the teeth on the unlocking bracket 4 and the unlocking bracket 4 is unlocked, and the unlocking bracket 4 is connected to the synchronous cross tube 11 through the energy-absorbing friction disc 9, and the synchronous cross tube 11 is used to connect the two seat cushion energy-absorbing locking mechanisms to move synchronously. One side of the energy-absorbing friction disc 9 is fixedly connected to the synchronous cross tube 11 of the seat cushion frame 1, and the other side is fixedly connected to the unlocking bracket 4. The energy-absorbing friction disc 9 is unlocked after the vehicle collision and allows the unlocking bracket 4 to rotate freely, thereby allowing the connecting rod support arm 2 connected to the unlocking bracket 4 to drive the seat basin 3 to quickly fall back to the initial position. The limiting mechanism includes: a ratchet pawl mechanism or a lock pin spring locking mechanism; the ratchet pawl mechanism includes: a ratchet 13, a pawl 14 meshing with the ratchet 13, the ratchet 13 is mounted on the unlocking bracket 4 and is coaxially sleeved on the synchronous cross tube 11 with the unlocking bracket 4, the pawl 14 is hinged on the cushion frame 1 near the ratchet 13, and the pawl 14 is used to limit the ratchet 13 from rotating in the unlocking direction opposite to the unlocking of the unlocking bracket 4; the lock pin spring locking mechanism includes: a lock block 15 mounted on the unlocking bracket 4, a lock block 15 mounted on the synchronous cross tube 1 1, a lock pin 17 installed on the lock frame 16, an avoidance lock hole opened on the side of the lock frame 16, and a holding spring 18 for holding the lock pin 17, the lock pin 17 is pressed against the end face of the lock block 15 by the holding spring 18, before the seat cushion collides, the lock block 15, the holding spring 18 and the lock pin 17 move together, after the seat cushion collides, the lock block 15 rotates with the energy absorbing friction disk 9, the lock pin 17 is pressed against the locking groove of the lock block 15 by the holding spring 18, and the lock pin 17 blocks the energy absorbing friction disk 9 from rotating by inertia. The energy-absorbing friction disc 9 includes: friction disc housings 19 on both sides, a trigger damping plate 20 rotatably connected to the inside of the friction disc housing 19, and a core shaft 21 connecting the friction disc housing 19 and the trigger damping plate 20. The arc-shaped wavy surfaces on both sides of the trigger damping plate 20 correspond to the shapes of the inner walls of the friction disc housings 19 on both sides. The trigger damping plate 20 is disposable, and a new energy-absorbing friction disc 9 or trigger damping plate 20 is required after each damage.

[0030] Working principle: when the seat cushion is raised to a zero-gravity, high-angle posture and a collision occurs, the detonator 7 drives the pull wire 8, which pulls the cam locking plate 6 to drive the lock tongue 10 to unlock, separate the unlocking bracket 4 from the rotating bracket 5, and cause the core shaft 21 of the energy-absorbing friction disc 9 to rotate, triggering the damping plate 20 to rub against the friction disc housing 19, and during the energy absorption process, the seat cushion returns to its designed posture, thereby protecting the occupant once, and the core shaft 21 synchronously drives the ratchet 14 to rotate; after the seat cushion returns to the designed position, the ratchet 13 triggers the pawl 14, causing the energy-absorbing friction disc 9 to stop working in the reverse direction due to the inertial force, thereby providing secondary protection for the occupant.

[0031] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A zero-gravity seat pan collision energy absorption locking mechanism, comprising: The seat frame is characterized in that two seat energy absorption locking mechanisms for the seat to quickly return to their original positions are symmetrically mounted on the seat frame, and the seat energy absorption locking mechanisms include: an unlocking bracket rotatably connected to the seat pan through a connecting rod support arm, a rotating bracket meshed with the unlocking bracket through teeth, a cam locking plate driving the rotating bracket to separate from the unlocking bracket, a detonator driving the cam locking plate to rotate and unlock, a pull line connecting the detonator and the cam locking plate, an energy absorption friction plate for unlocking after a vehicle collision, and a limiting mechanism for preventing the unlocking bracket from rotating in the opposite direction due to inertia force; The detonator pulls the lock tongue on the cam lock plate through the pull wire to overcome the pulling force of the spring and rotates. After the lock tongue contacts the groove of the rotating bracket, it drives the rotating bracket to rotate, so that the teeth on the rotating bracket are separated from the teeth on the unlocking bracket and the unlocking bracket is unlocked. The unlocking bracket is connected to the synchronous cross tube through an energy-absorbing friction disk. One side of the energy-absorbing friction disk is fixedly connected to the synchronous cross tube of the seat frame, and the other side is fixedly connected to the unlocking bracket. After the vehicle collides, the energy-absorbing friction disk is unlocked and the unlocking bracket rotates freely, so that the connecting rod support arm connected to the unlocking bracket drives the seat basin to quickly fall back to the initial position. Wherein, the limiting mechanism includes: a ratchet pawl mechanism or a lock pin spring locking mechanism.

2. The zero-gravity seat pan collision energy absorption locking mechanism according to claim 1, characterized in that: The ratchet and pawl mechanism includes: a ratchet and a pawl meshing with the ratchet, the ratchet is mounted on an unlocking bracket and is coaxially sleeved on a synchronous cross tube with the unlocking bracket, the pawl is hinged on a cushion frame close to the ratchet, and the pawl is used to limit the ratchet from rotating in the opposite direction of unlocking of the unlocking bracket.

3. The zero-gravity seat bowl collision energy absorption locking mechanism according to claim 1, characterized in that: The lock pin spring locking mechanism includes: a lock block installed on the unlocking bracket, a lock frame installed on the synchronous cross tube, a lock pin installed on the lock frame, an avoidance lock hole opened on the side of the lock frame, and a holding spring for holding the lock pin. The lock pin is pressed against the end face of the lock block by the holding spring. Before the seat cushion collides, the lock block, the holding spring and the lock pin move together. After the seat cushion collides, the lock block rotates with the energy absorbing friction disk, and the lock pin is pressed into the locking groove of the lock block by the holding spring. The lock pin blocks the energy absorbing friction disk from rotating in the opposite direction of unlocking of the unlocking bracket.

4. The zero-gravity seat bowl collision energy absorption locking mechanism according to claim 1, characterized in that: The energy-absorbing friction disc comprises: friction disc housings on both sides, a trigger damping plate rotatably connected to the inside of the friction disc housing, and a core shaft connecting the friction disc housing and the trigger damping plate. The arc-shaped wave surfaces on both sides of the trigger damping plate correspond to the shapes of the inner walls of the friction disc housings on both sides. The trigger damping plate is disposable, and a new energy-absorbing friction disc or trigger damping plate is required after each destruction.

5. The zero-gravity chair seat bowl collision energy absorption locking mechanism according to claim 1, characterized in that: The spring is a coil spring sleeved on the rotating shaft of the cam locking plate, or a tension spring for pulling the cam locking plate.

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