An automotive seat bracket structure with collision energy absorption characteristics

Abstract

The present invention discloses an automobile seat bracket structure with collision energy absorption characteristics, which includes a seat cushion, a height adjustment device and a mounting base. The height adjustment device is provided with a height adjustment driving component and two sets of link components; the height adjustment driving component can adjust and lock the rotation angle between the rear link of one set of the link components and the rear bracket; and it is characterized in that: a grid-type energy absorption structure is provided on the rear bracket of the other set of the link components. The present invention can absorb the impact energy of the occupant on the automobile seat during a rear-end collision of the automobile through the grid-type energy absorption structure, so that the energy acting on the seat cushion of the automobile seat is preferably transferred to the grid-type energy absorption structure, ensuring that other components of the seat cushion of the automobile seat, especially the seat side plates on both sides, will not undergo large deformation during a rear-end collision of the automobile, solving the safety hazard that the seat side plates of the automobile seat are prone to deformation and damage during a rear-end collision, and improving the safety performance of the automobile seat.

Description

Technical Field

[0001] The present invention relates to an automotive seat bracket structure with collision energy absorption characteristics. Background Art

[0002] Automotive passive safety is an important performance indicator for automobiles. As an important safety component of automobiles, seats play an important role in protecting occupants after a collision.

[0003] When a rear-end collision occurs, the human body exerts a backward impact force on the seat. This impact force forms a moment on the seat cushion assembly in a backward and downward direction through the backrest. For a seat with a height adjustment function, the energy of the impact on the seat cushion is not only absorbed by the seat cushion side plates but also by the height adjustment mechanism installed between the seat cushion and the slide rail. Therefore, if the structural strength of the height adjustment mechanism is relatively high, it will cause a large deformation of the seat cushion side plates, which is not conducive to the safety of the entire seat. Therefore, it is considered to design the bracket in the height adjustment mechanism into a component with a certain energy absorption effect to reasonably distribute the energy absorption during an automotive rear-end collision. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide an automotive seat bracket structure with collision energy absorption characteristics to solve the safety hazards existing in existing automotive seats due to poor collision energy absorption characteristics of the height adjustment mechanism (when a rear-end collision occurs, the seat cushion side plates are prone to large deformations, increasing the risk of human injury).

[0005] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] An automotive seat bracket structure with collision energy absorption characteristics, including a seat cushion, a height adjustment device, and a mounting base. The height adjustment device is provided with a height adjustment driving component and two sets of link components;

[0007] The two sets of link components are respectively located on the left and right sides and are respectively installed between the seat cushion side plates on the left side of the seat cushion and the mounting base and between the seat cushion side plates on the right side of the seat cushion and the mounting base to form two sets of planar four-bar linkages, that is: the link component includes a front link, a front bracket, a rear link, and a rear bracket. The front bracket and the rear bracket are both fixedly installed on the mounting base. The upper and lower ends of the front link are respectively hinged to the front end of the seat cushion side plate and the front bracket, and the upper and lower ends of the rear link are respectively hinged to the rear end of the seat cushion side plate and the rear bracket. Moreover, the rear link is inclined in a posture with the upper end at the rear and the lower end at the front;

[0008] The height adjustment driving component can adjust and lock the rotation angle between the rear link and the rear bracket of one of the sets of link components;

[0009] It is characterized in that:

[0010] A grid - type energy - absorbing structure is provided on the rear bracket of the other set of the link assemblies. The grid - type energy - absorbing structure is located behind the hinge position between the rear bracket and the rear link. The grid - type energy - absorbing structure includes connection blocks and multiple buffer bars. Both ends of each buffer bar are respectively fixedly connected to the rear bracket and the connection block, and each buffer bar is located on the rotation plane of the rear link of the other set of link assemblies. The buffer bars are arranged at intervals along the V - direction, and the V - direction has a horizontal component from front to back, such that when the rear link rotates in the direction with its upper end downward, the rear link can tear the buffer bars one by one along the V - direction.

[0011] As a preferred embodiment of the present invention: the structural strength of each buffer bar of the grid - type energy - absorbing structure increases one by one along the V - direction.

[0012] As a preferred embodiment of the present invention: the rear bracket is provided with a rear - bracket mounting plate, and the lower end of the rear link is hinged to the rear - bracket mounting plate; the buffer bar is composed of a straight - line segment and a connecting segment. The straight - line segment is fixedly connected to the connection block, and the connecting segment is fixedly connected to the rear - bracket mounting plate. The straight - line segment is parallel to the hinge axis between the rear link and the rear - bracket mounting plate. The straight - line segment of each buffer bar is located on the rotation plane of the rear link of the other set of link assemblies, and the V - direction is a straight - line direction from the front upper part to the rear lower part; such that when the rear link rotates in the direction with its upper end downward, the rear link can contact the straight - line segment of the buffer bar to tear the buffer bars one by one along the V - direction.

[0013] Preferably, the connecting segment of the buffer bar is an arc segment.

[0014] As a preferred embodiment of the present invention: the way that the structural strength of each buffer bar of the grid - type energy - absorbing structure increases one by one along the V - direction is as follows:

[0015] The gap width between any two adjacent buffer bars is set to a fixed value B. The thickness of each buffer bar in the V - direction increases one by one along the V - direction. And each buffer bar is numbered one by one along the V - direction. The fixed value B and the thickness a of the nth buffer bar in the V - direction n are calculated according to the following formulas 1 - 1 to formula 1 - 4:

[0016] Formula 1 - 1: a n = a 1 +γ(n - 1), n≥1;

[0017] Formula 1 - 2: a 1 =σb / l;

[0018] Formula 1-3: γ = σ b / w;

[0019] Formula 1-4: B = σ b / m;

[0020] Wherein, σ b is the tensile strength of the material of the buffer bar, with the unit of Mpa, l = 300 Mpa, w = 3000 Mpa, m = 400 Mpa.

[0021] As a preferred embodiment of the present invention: the way that the structural strength of each buffer bar of the grid - type energy - absorbing structure is enhanced one by one along the V direction is:

[0022] The thickness of each buffer bar in the V direction is set to a fixed value A, the gap width between two adjacent buffer bars decreases along the V direction, and each buffer bar is numbered one by one along the V direction. The fixed value A and the gap width b between the nth buffer bar and the (n + 1)th buffer bar n are calculated according to the following Formulas 2-1 to 2-4:

[0023] Formula 2-1: A = σ b / l;

[0024] Formula 2-2: b n = b 1 - σ(n - 1), n ≥ 1, and when b n < 0 is calculated, let b n = 0;

[0025] Formula 2-3: b 1 = σ b / m;

[0026] Formula 2-4: σ = σ b / x;

[0027] Wherein, σ b is the tensile strength of the material of the buffer bar, with the unit of Mpa, l = 300 Mpa, m = 400 Mpa, x = 2000 Mpa.

[0028] As a preferred embodiment of the present invention: the way that the structural strength of each buffer bar of the grid - type energy - absorbing structure is enhanced one by one along the V direction is:

[0029] The thickness of each of the buffer bars in the V direction increases successively in the V direction, the gap width between two adjacent buffer bars decreases in the V direction, and each of the buffer bars is numbered successively in the V direction. The thickness a of the nth buffer bar in the V direction n and the gap width b between the nth buffer bar and the (n + 1)th buffer bar n are calculated according to the following Formulas 3-1 to 3-6:

[0030] Formula 3-1: a n = a 1 + τ(n - 1), n ≥ 1;

[0031] Formula 3-2: a 1 = σ b / l;

[0032] Formula 3-3: τ = σ b / y;

[0033] Formula 3-4: b n = b 1 - υ(n - 1), n ≥ 1, and when b n < 0 is calculated, let b n = 0;

[0034] Formula 3-5: b 1 = σ b / m;

[0035] Formula 3-6: υ = σ b / z;

[0036] In the formulas, σ b is the tensile strength of the material of the buffer bar, with the unit of Mpa, l = 300 Mpa, y = 3500 Mpa, m = 400 Mpa, z = 2500 Mpa.

[0037] As a preferred embodiment of the present invention: the angle between the V direction and the installation plane of the rear bracket on the installation base is between 10° and 80°.

[0038] As a preferred embodiment of the present invention: when the seat cushion is in the lower limit height position, the rear link is in contact with the first buffer bar of the grid type energy absorption structure in the V direction.

[0039] As a preferred embodiment of the present invention: the mounting base is provided with a left slide rail mechanism and a right slide rail mechanism, both the left slide rail mechanism and the right slide rail mechanism extend along the front-back direction of the seat cushion, the front bracket and the rear bracket of the link assembly located on the left are both fixedly installed on the left slide rail mechanism, and the front bracket and the rear bracket of the link assembly located on the right are both fixedly installed on the right slide rail mechanism.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] First, by providing a grid-shaped energy-absorbing structure on the rear bracket of another set of link assemblies, the present invention can absorb the impact energy of the occupant on the vehicle seat during a rear-end collision of the vehicle through the grid-shaped energy-absorbing structure, so that the energy acting on the vehicle seat cushion is preferably transferred to the grid-shaped energy-absorbing structure, ensuring that other components of the vehicle seat cushion, especially the seat cushion side plates on both sides, will not undergo large deformation during a rear-end collision of the vehicle, solving the related safety hazards brought by the easy deformation and damage of the seat cushion side plates in a rear-end collision of the vehicle, and improving the safety performance of the vehicle seat.

[0042] Second, the structure of the present invention is simple, without increasing the total number of parts of the vehicle seat, and has a wide application range.

[0043] Third, by setting the structural strength of each buffer bar of the grid-shaped energy-absorbing structure to increase item by item along the V direction, when the vehicle undergoes a rear-end collision, the first buffer bar can quickly undergo plastic deformation under the impact force of the rear link, and guide the rear link to continue rotating in the Figure 1 counterclockwise direction as shown, so as to come into contact with other buffer bars item by item along the V direction; moreover, since the structural strength of the buffer bar at the end of the V direction is relatively high, it can ensure that the grid-shaped energy-absorbing structure will not fall off during the rear-end collision process, and limit the rotation angle of the rear link, ensuring the safety of the occupant.

[0044] Fourth, the three methods adopted by the present invention to achieve the gradual increase of the structural strength of each buffer bar of the grid-shaped energy-absorbing structure along the V direction can ensure that after the rear link squeezes each buffer bar to cause it to undergo plastic deformation until it tears, it will start to come into contact with the next buffer bar to absorb energy continuously. Therefore, it has the advantage of high energy absorption efficiency and can reduce the impact on the occupant during a rear-end collision.

[0045] In summary, the present invention can reasonably distribute the energy absorption of the seat components during a rear-end collision of the vehicle. Through the seat bracket with a collision energy-absorbing structure, the absorption of collision energy by other components (especially the seat cushion side plates) will be reduced, thereby reducing the design requirements for other components (especially the seat cushion side plates), and ultimately increasing the development efficiency of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described in detail below with reference to the drawings and specific embodiments:

[0047] Figure 1 is a schematic structural view of the vehicle seat bracket structure of the present invention;

[0048] Figure 2 is a schematic structural view of the rear link, rear bracket and grid-type energy absorption structure in the present invention;

[0049] Figure 3 is a schematic structural view of the grid-type energy absorption structure of the fourth embodiment of the present invention;

[0050] Figure 4 is a schematic structural view of the grid-type energy absorption structure of the fifth embodiment of the present invention;

[0051] Figure 5 is a schematic structural view of the grid-type energy absorption structure of the sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] The present invention will be further described below with reference to the embodiments:

[0053] Embodiment 1

[0054] As Figures 1 to 5 shown, the present invention discloses a vehicle seat bracket structure with collision energy absorption characteristics, including a seat cushion 1, a height adjustment device and a mounting base 2. The height adjustment device is provided with a height adjustment drive assembly and two link assemblies;

[0055] The two link assemblies are respectively located on the left and right sides and are respectively installed between the seat side plate 1-1 on the left side of the seat cushion 1 and the mounting base 2 and between the seat side plate 1-1 on the right side of the seat cushion 1 and the mounting base 2 to form two sets of planar four-bar linkages, that is: the link assembly includes a front link 3, a front bracket 4, a rear link 5 and a rear bracket 6. The front bracket 4 and the rear bracket 6 are both fixedly installed on the mounting base 2. The upper end and the lower end of the front link 3 are respectively hinged to the front end of the seat side plate 1-1 and the front bracket 4. The upper end and the lower end of the rear link 5 are respectively hinged to the rear end of the seat side plate 1-1 and the rear bracket 6. And the rear link 5 is inclined in a posture with the upper end at the rear and the lower end at the front;

[0056] The height adjustment driving component can adjust and lock the rotation angle between the rear link 5 of one set of the link components and the rear bracket 6, so as to drive the rotation angles between the front links 3 of the two sets of link components and the front brackets 4 and the rotation angles between the rear links 5 of the other set of link components and the rear brackets 6 through the seat cushion 1, thereby realizing the height adjustment of the seat cushion 1 relative to the mounting base 2;

[0057] A grid-shaped energy absorption structure 7 is provided on the rear bracket 6 of the other set of link components. The grid-shaped energy absorption structure 7 is located behind the hinge position 6a between the rear bracket 6 and the rear link 5. The grid-shaped energy absorption structure 7 includes a connecting block 7-1 and a plurality of buffer bars 7-2. Both ends of each buffer bar 7-2 are fixedly connected to the rear bracket 6 and the connecting block 7-1 respectively, and each buffer bar 7-2 is located on the rotation plane of the rear link 5 of the other set of link components. The buffer bars 7-2 are arranged at intervals along the V direction. The V direction has a horizontal component from front to back. The V direction can be a straight line direction or a curved line direction, so that: when the rear link 5 rotates in the direction with its upper end downward, the rear link 5 can tear the buffer bars 7-2 one by one along the V direction.

[0058] The working principle of the vehicle seat bracket structure of the present invention is as follows:

[0059] See Figure 1 , when a rear-end collision occurs to the vehicle, the occupant generates an impact force F on the backrest 8 of the vehicle seat, which is transmitted to the rear links 5 of the two sets of link components through the seat cushion side plate 1-1. The rear link 5 of one set of the link components will not rotate due to the angle locking effect of the height adjustment driving component, while the rear link 5 of the other set of link components rotates counterclockwise around its hinge axis with the rear bracket mounting plate 6-1 according to Figure 1 ; thus, during the rotation of the rear link 5, the rear link 5 presses the buffer bars 7-2 of the grid-shaped energy absorption structure 7 into plastic deformation and tears them one by one along the V direction, so that the grid-shaped energy absorption structure 7 plays an energy absorption role during this process. Therefore, the present invention can absorb the impact energy of the occupant on the vehicle seat during a rear-end collision through the grid-shaped energy absorption structure 7, so that the energy acting on the vehicle seat cushion is better transferred to the grid-shaped energy absorption structure 7, ensuring that other components of the vehicle seat cushion, especially the seat cushion side plates 1-1 on both sides, will not undergo large deformation during a rear-end collision, solving the related safety hazards caused by the easy deformation and damage of the seat cushion side plates of the vehicle seat during a rear-end collision, and improving the safety performance of the vehicle seat.

[0060] Moreover, the structure of the present invention is simple, without increasing the total number of parts of the vehicle seat, and has a wide application range.

[0061] Embodiment 2

[0062] On the basis of the above Embodiment 1, the following preferred structure is further adopted in this Embodiment 2:

[0063] The structural strength of each buffer bar 7-2 of the grid-shaped energy absorption structure 7 is enhanced one by one along the V direction.

[0064] Thus, when a rear-end collision occurs to the vehicle, through the design that the structural strength of each buffer bar 7-2 is enhanced one by one along the V direction, it can be ensured that the first buffer bar 7-2 rapidly undergoes plastic deformation under the impact force of the rear link 5, and guides the rear link 5 to continue rotating in the Figure 1 counterclockwise direction to successively contact other buffer bars 7-2 along the V direction; moreover, since the buffer bar 7-2 located at the end of the V direction has a relatively high structural strength, it can ensure that the grid-shaped energy absorption structure 7 will not fall off during the rear-end collision process, and limits the rotation angle of the rear link 5, thus ensuring the safety of the occupants.

[0065] Embodiment 3

[0066] On the basis of the above Embodiment 2, the following preferred structure is further adopted in this Embodiment 3:

[0067] The rear bracket 6 is provided with a rear bracket mounting plate 6-1, and the lower end of the rear link 5 is hinged to the rear bracket mounting plate 6-1; the buffer bar 7-2 is composed of a straight line segment and a connecting segment, and the straight line segment is fixedly connected to the connecting block 7-1, the connecting segment is fixedly connected to the rear bracket mounting plate 6-1, the straight line segment is parallel to the hinge axis of the rear link 5 and the rear bracket mounting plate 6-1, the straight line segment of each buffer bar 7-2 is located in the rotation plane of the rear link 5 of the other set of link assemblies, and moreover, the V direction is a straight line direction pointing from the front upper part to the rear lower part; such that: when the rear link 5 rotates in the direction with its upper end downward, the rear link 5 can contact the straight line segment of the buffer bar 7-2 to successively tear the buffer bar 7-2 along the V direction.

[0068] Among them, preferably: the connecting segment of the buffer bar 7-2 is an arc segment.

[0069] Embodiment 4

[0070] On the basis of the above Embodiment 3, the following preferred structure is further adopted in this Embodiment 4:

[0071] The manner in which the structural strength of each buffer bar 7-2 of the grid-shaped energy absorption structure 7 is enhanced one by one along the V direction is as follows:

[0072] As Figure 3As shown, the gap width between any two adjacent buffer bars 7-2 is set to a fixed value B. The thickness of each buffer bar 7-2 in the V direction increases one by one in the V direction. Moreover, each buffer bar 7-2 is numbered one by one in the V direction. The fixed value B and the thickness a of the nth buffer bar 7-2 in the V direction n are calculated according to the following Formulas 1-1 to 1-4:

[0073] Formula 1-1: a n = a 1 + γ(n - 1), n ≥ 1;

[0074] Formula 1-2: a 1 = σ b / l;

[0075] Formula 1-3: γ = σ b / w;

[0076] Formula 1-4: B = σ b / m;

[0077] In the formula, σ b is the tensile strength of the material of the buffer bar 7-2, with the unit of Mpa. l = 300 Mpa, w = 3000 Mpa, m = 400 Mpa.

[0078] For example: Figure 3 in, the thickness of the first buffer bar 7-2 is a 1 , the thickness of the second buffer bar 7-2 is a 2 , the thickness of the third buffer bar 7-2 is a 3 , the thickness of the (n - 1)th buffer bar 7-2 is a n-1 , and the thickness of the nth buffer bar 7-2 is a n .

[0079] Embodiment Five

[0080] On the basis of the above Embodiment Three, this Embodiment Five also adopts the following preferred structure:

[0081] The way that the structural strength of each buffer bar 7-2 of the grid-type energy absorption structure 7 increases one by one in the V direction is:

[0082] As Figure 4As shown, the thickness of each of the buffer bars 7-2 in the V direction is set to a fixed value A, the gap width between adjacent buffer bars 7-2 decreases in the V direction, and each of the buffer bars 7-2 is numbered one by one in the V direction. The fixed value A and the gap width b between the nth buffer bar 7-2 and the (n + 1)th buffer bar 7-2 n are calculated according to the following Formulas 2-1 to 2-4:

[0083] Formula 2-1: A = σ b / l;

[0084] Formula 2-2: b n = b 1 - σ(n - 1), n ≥ 1, and when b n < 0 is calculated, let b n = 0;

[0085] Formula 2-3: b 1 = σ b / m;

[0086] Formula 2-4: σ = σ b / x;

[0087] In the formula, σ b is the tensile strength of the material of the buffer bar 7-2, with the unit of Mpa, l = 300 Mpa, m = 400 Mpa, x = 2000 Mpa.

[0088] For example: Figure 4 in, the gap width between the first buffer bar 7-2 and the second buffer bar 7-2 is b 1 , the gap width between the second buffer bar 7-2 and the third buffer bar 7-2 is b 2 , and the gap width between the nth buffer bar 7-2 and the (n + 1)th buffer bar 7-2 is b n .

[0089] Example Six

[0090] Based on the above Example Three, this Example Six also adopts the following preferred structure:

[0091] The way that the structural strength of each buffer bar 7-2 of the grid-type energy absorption structure 7 is enhanced one by one in the V direction is:

[0092] As Figure 5As shown, the thickness of each of the buffer bars 7-2 in the V direction increases successively in the V direction, and the gap width between two adjacent buffer bars 7-2 decreases in the V direction. Also, each of the buffer bars 7-2 is numbered successively in the V direction. The thickness a of the nth buffer bar 7-2 in the V direction n and the gap width b between the nth buffer bar 7-2 and the (n + 1)th buffer bar 7-2 n are calculated according to the following Formulas 3-1 to 3-6:

[0093] Formula 3-1: a n = a 1 + τ(n - 1), n ≥ 1;

[0094] Formula 3-2: a 1 = σ b / l;

[0095] Formula 3-3: τ = σ b / y;

[0096] Formula 3-4: b n = b 1 - υ(n - 1), n ≥ 1, and when b n < 0 is calculated, let b n = 0;

[0097] Formula 3-5: b 1 = σ b / m;

[0098] Formula 3-6: υ = σ b / z;

[0099] In the formulas, σ b is the tensile strength of the material of the buffer bar 7-2, with the unit of Mpa, l = 300 Mpa, y = 3500 Mpa, m = 400 Mpa, and z = 2500 Mpa.

[0100] For example: Figure 5 in, the thickness of the 1st buffer bar 7-2 is a 1 , the thickness of the 2nd buffer bar 7-2 is a 2 , the thickness of the 3rd buffer bar 7-2 is a 3 , the thickness of the (n - 1)th buffer bar 7-2 is a n-1 , and the thickness of the nth buffer bar 7-2 is a n . The gap width between the 1st buffer bar 7-2 and the 2nd buffer bar 7-2 is b 1, the gap width between the buffer strip 7-2 described in Article 2 and the buffer strip 7-2 described in Article 3 is b 2 , the gap width between the buffer strip 7-2 described in Article n and the buffer strip 7-2 described in Article n + 1 is b n .

[0101] Embodiment Seven

[0102] Based on any one of the above-mentioned Embodiment Four to Embodiment Six, Embodiment Seven of the present invention further adopts the following preferred structure:

[0103] The included angle between the V direction and the installation plane of the rear bracket 6 on the installation base 2 is between 10° and 80°.

[0104] Embodiment Eight

[0105] Based on any one of the above-mentioned Embodiment One to Embodiment Seven, Embodiment Eight of the present invention further adopts the following preferred structure:

[0106] When the seat cushion 1 is in the lower limit height position, the rear link 5 contacts the first buffer strip 7-2 of the grid type energy absorption structure 7 in the V direction to better transfer and absorb the energy of the seat in a rear-end collision.

[0107] Embodiment Nine

[0108] Based on any one of the above-mentioned Embodiment One to Embodiment Eight, Embodiment Nine of the present invention further adopts the following preferred structure:

[0109] The installation base 2 is provided with a left slide rail mechanism and a right slide rail mechanism. Both the left slide rail mechanism and the right slide rail mechanism extend along the front-back direction of the seat cushion 1. The front bracket 4 and the rear bracket 6 of the link assembly located on the left are fixedly installed on the left slide rail mechanism, and the front bracket 4 and the rear bracket 6 of the link assembly located on the right are fixedly installed on the right slide rail mechanism.

[0110] The present invention is not limited to the above specific embodiments. According to the above content, according to the common general knowledge and customary means in the art, without departing from the above basic technical idea of the present invention, the present invention can also make various other forms of equivalent modifications, substitutions or changes, all of which fall within the protection scope of the present invention.

Claims

1. An automotive seat bracket structure with collision energy absorption characteristics, comprising a seat cushion (1), a height adjustment device, and a mounting base (2). The height adjustment device is provided with a height adjustment driving component and two sets of link components; The two sets of link components are respectively located on the left and right sides and are respectively installed between the seat side plate (1-1) on the left side of the seat cushion (1) and the mounting base (2), and between the seat side plate (1-1) on the right side of the seat cushion (1) and the mounting base (2) to form two sets of planar four-bar linkages, that is: the link component includes a front link (3), a front bracket (4), a rear link (5), and a rear bracket (6). The front bracket (4) and the rear bracket (6) are both fixedly installed on the mounting base (2). The upper and lower ends of the front link (3) are respectively hinged to the front end of the seat side plate (1-1) and the front bracket (4), and the upper and lower ends of the rear link (5) are respectively hinged to the rear end of the seat side plate (1-1) and the rear bracket (6). Moreover, the rear link (5) is inclined with the upper end at the rear and the lower end at the front; The height adjustment driving component can adjust and lock the rotation angle between the rear link (5) and the rear bracket (6) of one of the sets of link components; It is characterized in that: A grid-type energy absorption structure (7) is provided on the rear bracket (6) of the other set of link components. The grid-type energy absorption structure (7) is located behind the hinge position (6a) between the rear bracket (6) and the rear link (5). The grid-type energy absorption structure (7) includes a connecting block (7-1) and a plurality of buffer bars (7-2). Both ends of each buffer bar (7-2) are respectively fixedly connected to the rear bracket (6) and the connecting block (7-1), and each buffer bar (7-2) is located in the rotation plane of the rear link (5) of the other set of link components. The buffer bars (7-2) are arranged at intervals along the V direction. The V direction has a horizontal component from front to back, such that: when the rear link (5) rotates in the direction with its upper end downward, the rear link (5) can tear the buffer bars (7-2) one by one along the V direction; The structural strength of each buffer bar (7-2) of the grid-type energy absorption structure (7) increases one by one along the V direction.

2. The automotive seat bracket structure with collision energy absorption characteristics according to claim 1, It is characterized in that: The rear bracket (6) is provided with a rear bracket mounting plate (6-1), and the lower end of the rear link (5) is hinged to the rear bracket mounting plate (6-1); the buffer bar (7-2) is composed of a straight segment and a connecting segment connected. The straight segment is fixedly connected to the connecting block (7-1), and the connecting segment is fixedly connected to the rear bracket mounting plate (6-1). The straight segment is parallel to the hinge axis of the rear link (5) and the rear bracket mounting plate (6-1). The straight segment of each buffer bar (7-2) is located in the rotation plane of the rear link (5) of the other set of link components. Moreover, the V direction is a straight line direction pointing from the front upper part to the rear lower part; such that when the rear link (5) rotates in the direction with its upper end downward, the rear link (5) can contact the straight-line segment of the buffer stop bar (7-2) to tear the buffer stop bar (7-2) one by one in the V direction.

3. The automotive seat bracket structure with collision energy absorption characteristics according to claim 2, characterized in that: the connecting segment of the buffer stop bar (7-2) is an arc segment.

4. The automotive seat bracket structure with collision energy absorption characteristics according to claim 2, characterized in that: the way that the structural strength of each buffer stop bar (7-2) of the grid-type energy absorption structure (7) increases one by one in the V direction is: The gap width between any two adjacent buffer bars (7-2) is set to a fixed value B, the thickness of each buffer bar (7-2) in the V direction increases item by item in the V direction, and each buffer bar (7-2) is numbered item by item in the V direction. The fixed value B and the thickness a of the nth buffer bar (7-2) in the V direction n are calculated according to the following Formulas 1-1 to 1-4: Formula 1-1: a n = a 1 +γ(n - 1), n≥1; Formula 1-2: a 1 = σ b / l; Formula 1-3: γ = σ b / w; Formula 1-4: B = σ b / m; where σ b is the tensile strength of the material of the buffer bar (7-2), in Mpa, l = 300 Mpa, w = 3000 Mpa, m = 400 Mpa.

5. The automotive seat bracket structure with collision energy absorption characteristics according to claim 2, characterized in that: the way that the structural strength of each buffer stop bar (7-2) of the grid-type energy absorption structure (7) increases one by one in the V direction is: The thickness of each of the buffer bars (7-2) in the V direction is set to a fixed value A, the gap width between two adjacent buffer bars (7-2) decreases in the V direction, and each of the buffer bars (7-2) is numbered one by one in the V direction. The fixed value A and the gap width b between the nth buffer bar (7-2) and the (n + 1)th buffer bar (7-2) n are calculated according to the following Formulas 2-1 to 2-4: Formula 2-1: A = σ b / l; Formula 2-2: b n = b 1 - σ(n - 1), n ≥ 1, and when calculating b n < 0, let b n = 0; Formula 2-3: b 1 = σ b / m; Formula 2-4: σ = σ b / x; where σ b is the tensile strength of the material of the buffer bar (7-2), with the unit of Mpa, l = 300 Mpa, m = 400 Mpa, and x = 2000 Mpa.

6. The automotive seat bracket structure with collision energy absorption characteristics according to claim 2, characterized in that: the way that the structural strength of each buffer stop bar (7-2) of the grid-type energy absorption structure (7) increases one by one in the V direction is: The thickness of each of the buffer bars (7-2) in the V direction increases bar by bar in the V direction, and the gap width between two adjacent buffer bars (7-2) decreases in the V direction. Moreover, each of the buffer bars (7-2) is numbered bar by bar in the V direction. The thickness a of the nth buffer bar (7-2) in the V direction n and the gap width b between the nth buffer bar (7-2) and the (n + 1)th buffer bar (7-2) n are calculated according to the following formulas 3-1 to 3-6: Formula 3-1: a n = a 1 + τ(n - 1), n ≥ 1; Formula 3-2: a 1 = σ b / l; Formula 3-3: τ = σ b / y; Formula 3-4: b n = b 1 - υ(n - 1), n ≥ 1, and when calculating b n < 0, let b n = 0; Formula 3-5: b 1 = σ b / m; Formula 3-6: υ = σ b / z; Where, σ b is the tensile strength of the material of the buffer bumper (7-2), with the unit of Mpa, l = 300 Mpa, y = 3500 Mpa, m = 400 Mpa, z = 2500 Mpa.

7. The automotive seat bracket structure with collision energy absorption characteristics according to any one of claims 4 to 6, characterized in that: the angle between the V direction and the installation plane of the rear bracket (6) on the installation base (2) is between 10° and 80°.

8. The automotive seat bracket structure with collision energy absorption characteristics according to any one of claims 1 to 6, characterized in that: when the seat cushion (1) is at the lower limit height position, the rear link (5) contacts the first buffer stop bar (7-2) of the grid-type energy absorption structure (7) in the V direction.

9. The automotive seat bracket structure with collision energy absorption characteristics according to any one of claims 1 to 6, characterized in that: the installation base (2) is provided with a left slide rail mechanism and a right slide rail mechanism. Both the left slide rail mechanism and the right slide rail mechanism extend along the front-back direction of the seat cushion (1). The front bracket (4) and the rear bracket (6) of the link assembly on the left are both fixedly installed on the left slide rail mechanism, and the front bracket (4) and the rear bracket (6) of the link assembly on the right are both fixedly installed on the right slide rail mechanism.

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