An energy-absorbing connection structure and an automotive seat connection structure

Abstract

The present invention discloses an energy-absorbing connection structure and an automotive seat connection structure. By providing a first rigid weakening structure on a first plate, adopting a first end with a stepped structure, and providing a first reinforcing plate, when the first plate is subjected to pressure or a normal tensile force, it can transfer the acting force to the second plate normally. When the first plate is subjected to a suddenly increased tensile force, by virtue of the characteristic that the connection strength between the first hole-edge region and the first peripheral region on the first plate is weakened by the first rigid weakening structure, the impact energy generated by the tensile force is absorbed through the large plastic deformation and shear fracture of the first plate, so as to buffer the relative movement between the first plate and the second plate. Moreover, by using the first reinforcing plate, it can be ensured that even when the first hole-edge region of the first plate is cut off, the acting force can still be transferred between the first plate and the second plate. The present invention has the advantages of being able to buffer the impact force and having high connection reliability.

Description

Technical Field

[0001] The present invention relates to an energy-absorbing connection structure and an automotive seat connection structure applying the energy-absorbing connection structure. Background Art

[0002] For connection structures such as bolts and rivets, due to their connection characteristics, when the structure is subjected to tensile force, the scattered and evenly distributed forces on the components will be concentrated on the bolts, and the force will be continuously transmitted to the next part through the bolts. Therefore, a very large concentrated force will be exerted at the bolt connection hole, and large deformation is likely to occur at the connection hole of the plate.

[0003] During the normal use of many connection structures in an automobile, the loads they are subjected to are very small. For example, for the connection structure of a seat, when an occupant is sitting normally, the concentrated force on the connecting piece is very small, far less than the strength limit of the connecting piece. When a vehicle collides, the connecting piece of the seat will be subjected to a very large impact force from the occupant on the seat.

[0004] In the prior art, for a connection structure for connecting two plates, when subjected to an impact force, there are the following deficiencies: First, the connection structure has no buffering effect on the impact force; Second, after being subjected to the impact force, the connection structure is damaged, and the force cannot be transmitted between the two plates anymore. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to provide an energy-absorbing connection structure and an automotive seat connection structure to solve the problems of the existing connection structure having no buffering effect on the impact force and poor connection reliability.

[0006] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0007] An energy-absorbing connection structure for connecting a first plate and a second plate; the energy-absorbing connection structure is provided with a connecting piece, and the connecting piece has a first end, a second end, and a rod portion connected between the first end and the second end;

[0008] The first plate and the second plate are respectively provided with a first through hole and a second through hole. The first plate and the second plate are attached to each other so that the first through hole and the second through hole communicate to form a connection hole, and the rod portion of the connecting piece passes through the connection hole, so that the first plate and the second plate are clamped between the first end and the second end of the connecting piece;

[0009] It is characterized in that: the energy-absorbing connection structure is further provided with a first reinforcing plate having a first through hole;

[0010] The first plate is provided with a first rigid weakening structure, such that the first plate is divided into a first hole-edge area surrounding the first through hole and a first peripheral area other than the first hole-edge area, and the first rigid weakening structure can weaken the connection strength between the first hole-edge area and the first peripheral area;

[0011] The first end is a stepped structure composed of a first large-diameter portion and a first small-diameter portion, and the first small-diameter portion is in contact with the first plate within the first hole-edge area of the first plate;

[0012] The first reinforcing plate is sleeved on the first small-diameter portion through the first through hole, and the diameter of the first through hole is larger than the outer diameter of the first small-diameter portion and smaller than the outer diameter of the first large-diameter portion.

[0013] As a preferred embodiment of the present invention: the first rigid weakening structure is a discontinuous annular groove structure or a star-shaped notch structure;

[0014] Wherein, the discontinuous annular groove structure includes a plurality of slots, and each of the slots is uniformly arranged at intervals around the through hole on the plate where the connection hole is to be formed;

[0015] The star-shaped notch structure includes a plurality of notches, each of the notches communicates with the through hole on the plate where the connection hole is to be formed and extends along the radial direction of the through hole, and the notches are uniformly arranged at intervals around the through hole on the plate where the connection hole is to be formed.

[0016] As a preferred embodiment of the present invention: the energy-absorbing connection structure is further provided with a second reinforcing plate having a second through hole;

[0017] The second plate is provided with a second rigid weakening structure, such that the second plate is divided into a second hole-edge area surrounding the second through hole and a second peripheral area other than the second hole-edge area, and the second rigid weakening structure can weaken the connection strength between the second hole-edge area and the second peripheral area;

[0018] The second end is a stepped structure composed of a second large-diameter portion and a second small-diameter portion, and the second small-diameter portion is in contact with the second plate within the second hole-edge area of the second plate;

[0019] The second reinforcing plate is sleeved on the second small-diameter portion through the second through hole, and the diameter of the second through hole is larger than the outer diameter of the second small-diameter portion and smaller than the outer diameter of the second large-diameter portion.

[0020] As a preferred embodiment of the present invention: both the first rigid weakening structure and the second rigid weakening structure are intermittent annular groove structures, or both are star-shaped notch structures, or one of them is an intermittent annular groove structure and the other is a star-shaped notch structure;

[0021] Among them, the intermittent annular groove structure includes a plurality of slots, and each of the slots is evenly spaced around the through hole on the plate where it is located for forming the connection hole;

[0022] The star-shaped notch structure includes a plurality of notches, and each notch communicates with the through hole on the plate where it is located for forming the connection hole and extends along the radial direction of the through hole, and the notches are evenly spaced around the through hole on the plate where it is located for forming the connection hole.

[0023] As a preferred embodiment of the present invention: in the intermittent annular groove structure, the shape enclosed by each of the slots is the same as the shape of the end face of the small-diameter part in contact with the plate where it is located, and the shape enclosed by each of the slots is centered on the center of the through hole on the plate where it is located for forming the connection hole.

[0024] As a preferred embodiment of the present invention: for the intermittent annular groove structure, the edge of the small-diameter part in contact with the plate where the intermittent annular groove structure is located is pressed between the inner diameter edge and the outer diameter edge of each of the slots.

[0025] As a preferred embodiment of the present invention: in the star-shaped notch structure, the width of each notch gradually increases outward from the through hole on the plate where it is located for forming the connection hole.

[0026] As a preferred embodiment of the present invention: the connecting member is formed by connecting a bolt and a nut, and the first end, the second end and the rod portion are the bolt head of the bolt, the nut and the screw rod of the bolt in sequence, or the first end, the second end and the rod portion are the nut, the bolt head of the bolt and the screw rod of the bolt in sequence.

[0027] As a preferred embodiment of the present invention: the first reinforcing plate is welded to the first plate, and the second reinforcing plate is welded to the second plate.

[0028] An automobile seat connection structure includes an automobile seat and a seat mounting substrate, and the front-end plate of the bottom surface of the seat cushion skeleton of the automobile seat and the seat mounting substrate are connected through a connection structure; characterized in that: the connection structure is the energy-absorbing connection structure; the front-end plate of the bottom surface of the seat cushion skeleton of the automobile seat is the first plate of the energy-absorbing connection structure, and the seat mounting substrate is the second plate of the energy-absorbing connection structure.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] First, by providing a first rigid weakening structure on the first plate, adopting a first end with a stepped structure, and providing a first reinforcing plate, when the first plate is subjected to pressure or a normal tensile force, it can transfer the acting force to the second plate normally. When the first plate is subjected to a suddenly increased tensile force, due to the characteristic that the connection strength between the first hole-edge region and the first peripheral region on the first plate is weakened by the first rigid weakening structure, the impact energy generated by the tensile force is absorbed through the plastic large deformation and shear fracture of the first plate, so as to buffer the relative movement between the first plate and the second plate. Moreover, by using the first reinforcing plate, it can be ensured that even when the first hole-edge region of the first plate is cut off, the acting force can still be transferred between the first plate and the second plate. Therefore, the present invention has the advantages of being able to buffer impact force and having high connection reliability.

[0031] Second, by providing a second rigid weakening structure on the second plate, adopting a second end with a stepped structure, and providing a second reinforcing plate, due to the characteristic that the connection strength between the second hole-edge region and the second peripheral region on the second plate is weakened by the second rigid weakening structure, the impact energy generated by the tensile force is further absorbed through the plastic large deformation or even shear fracture of the second plate, so as to further buffer the relative movement between the first plate and the second plate. Moreover, by using the second reinforcing plate, it can be ensured that the acting force is transferred between the first plate and the second plate. Therefore, the present invention further improves the buffering effect on the impact force and can ensure the connection reliability.

[0032] Third, by adopting a discontinuous annular groove structure and a star-shaped notch structure, the plate can be simply and reliably divided into a hole-edge region and a peripheral region, and the implementation cost is low.

[0033] Fourth, the seat connection structure of the present invention realizes the connection between the front end plate of the seat cushion skeleton of the vehicle seat and the seat mounting substrate through an energy-absorbing connection structure. By using the energy-absorbing connection structure to buffer the impact force received by the vehicle seat when the vehicle is rear-ended, on the one hand, it effectively buffers the impact force between the occupant and the backrest, and on the other hand, it reduces the structural deformation of the vehicle seat and can also effectively reduce the injury suffered by the occupant due to the deformation of the seat skeleton. Moreover, due to the high connection reliability of the energy-absorbing connection structure, it can also ensure the connection integrity between the vehicle seat and the seat mounting substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following further describes the present invention in detail with reference to the drawings and specific embodiments:

[0035] Figure 1 is a schematic cross-sectional structure diagram of the energy-absorbing connection structure of the present invention;

[0036] Figure 2 Schematic plan view of the first plate in which the first rigid weakening structure is a discontinuous annular groove structure in the present invention;

[0037] Figure 3 Schematic plan view of the second plate in which the second rigid weakening structure is a star-shaped notch structure in the present invention;

[0038] Figure 4-1 One of the schematic views of the energy-absorbing connection structure of the present invention when the first plate is subjected to a tensile force;

[0039] Figure 4-2 Another schematic view of the energy-absorbing connection structure of the present invention when the first plate is subjected to a tensile force;

[0040] Figure 4-3 Still another schematic view of the energy-absorbing connection structure of the present invention when the first plate is subjected to a tensile force;

[0041] Figure 4-4 Yet another schematic view of the energy-absorbing connection structure of the present invention when the first plate is subjected to a tensile force;

[0042] Figure 5-1 Schematic illustration of the vehicle seat connection structure of the present invention during a rear-end collision of a vehicle Figure 1 ;

[0043] Figure 5-2 Schematic illustration of the vehicle seat connection structure of the present invention during a rear-end collision of a vehicle Figure 2 。 Detailed implementation manners

[0044] The present invention will be further described below in conjunction with embodiments:

[0045] Embodiment 1

[0046] As Figures 1 to 3 shown, the energy-absorbing connection structure disclosed in Embodiment 1 is used to connect the first plate 1 and the second plate 2; the energy-absorbing connection structure is provided with a connecting member 3, and the connecting member 3 has a first end 31, a second end 32, and a rod portion 33 connected between the first end 31 and the second end 32.

[0047] The first plate 1 and the second plate 2 are respectively provided with a first through hole 1a and a second through hole 2a. The first plate 1 and the second plate 2 are attached to each other so that the first through hole 1a and the second through hole 2a communicate to form a connection hole b. The rod portion 33 of the connecting member 3 passes through the connection hole b, so that the first plate 1 and the second plate 2 are clamped between the first end 31 and the second end 32 of the connecting member 3.

[0048] The energy-absorbing connection structure further includes a first reinforcing plate 4 having a first through hole 4a.

[0049] A first rigid weakening structure 1c is provided on the first plate 1, such that the first plate 1 is divided into a first hole-edge area 11 surrounding the first through hole 1a and a first peripheral area 12 other than the first hole-edge area 11, and the first rigid weakening structure 1c can weaken the connection strength between the first hole-edge area 11 and the first peripheral area 12.

[0050] The first end 31 is a stepped structure composed of a first large-diameter portion 311 and a first small-diameter portion 312, and the first small-diameter portion 312 is in contact with the first plate 1 within the first hole-edge area 11 of the first plate 1.

[0051] The first reinforcing plate 4 is sleeved on the first small-diameter portion 312 through the first through hole 4a, and the diameter of the first through hole 4a is larger than the outer diameter of the first small-diameter portion 312 and smaller than the outer diameter of the first large-diameter portion 311.

[0052] The working principle of the energy-absorbing connection structure of the first embodiment is as follows:

[0053] For the case where the first plate 1 is subjected to a pressure F 压 :

[0054] As Figure 1 shown, the pressure F acting on the first plate 1 压 can be directly transmitted to the second plate 2 through the first plate 1, and no concentrated force will be applied to the first plate 1 at the first through hole 1a or the second plate 2 at the second through hole 2a.

[0055] For the case where the first plate 1 is subjected to a tensile force F 拉 :

[0056] As Figure 4-1 shown, under normal working conditions, when the first plate 1 is subjected to a normal magnitude of tensile force F 拉 , the structural rigidity and strength of the first plate 1 enable it to remain undeformed under the action of the tensile force F 拉 , and the tensile force F acting on the first plate 1 压 is sequentially transmitted to the second plate 2 through the first plate 1, the first end 31, the rod portion 33, and the second end 32.

[0057] As Figure 4-2 shown, under sudden abnormal working conditions, when the tensile force F acting on the first plate 1 拉 suddenly increases, the tensile force F 拉An impact is formed on the first plate 1, such that the first plate 1 is subjected to a very large shearing force. Since the connection strength between the first hole-edge region 11 and the first peripheral region 12 on the first plate 1 is weakened by the first rigidity-weakening structure 1c, therefore, the connection between the first hole-edge region 11 and the first peripheral region 12 undergoes a large plastic deformation first under the action of the shearing force, such that: the first hole-edge region 11 of the first plate 1 is still in contact with the second plate 2 under the clamping action of the first end 31 and the second end 32, while the first peripheral region 12 of the first plate 1 and the first reinforcing plate 4 are pulled towards the first large-diameter portion 311 under the action of the tensile force F 拉 and move. At this time, the tensile force F 压 acting on the first plate 1 is transmitted to the second plate 2 successively through the first plate 1 that has undergone a large plastic deformation, the first end 31, the rod portion 33, and the second end 32.

[0058] As Figure 4-3 shown, as the above Figure 4-2 mentioned working condition continues to develop, when the shearing force received at the connection between the first hole-edge region 11 and the first peripheral region 12 exceeds the connection strength weakened by the first rigidity-weakening structure 1c, the connection between the first hole-edge region 11 and the first peripheral region 12 is cut off, and the first peripheral region 12 of the first plate 1 and the first reinforcing plate 4 are continuously pulled towards the first large-diameter portion 311 under the action of the tensile force F 拉 and move until the first reinforcing plate 4 comes into contact with the first large-diameter portion 311. Then, the tensile force F 压 acting on the first plate 1 is transmitted to the second plate 2 successively through the first peripheral region 12 of the first plate 1, the first reinforcing plate 4, the first large-diameter portion 311 of the first end 31, the first small-diameter portion 312 of the first end 31, the rod portion 33, and the second end 32, that is, it ensures that the first plate 1 and the second plate 2 can still transmit the acting force, guaranteeing the connection reliability of the energy-absorbing connection structure of the present invention for the first plate 1 and the second plate 2.

[0059] Thus, the energy-absorbing connection structure of the first embodiment, when the first plate 1 is subjected to the pressure F 压 or the tensile force F 拉 of normal magnitude, can normally transmit the acting force to the second plate 2, while when the first plate 1 is subjected to the tensile force F 拉 that suddenly increases, by using the characteristic that the connection strength between the first hole-edge region 11 and the first peripheral region 12 on the first plate 1 is weakened by the first rigidity-weakening structure 1c, the tensile force F 拉The generated impact energy buffers the relative movement between the first plate 1 and the second plate 2, and by using the first reinforcing plate 4, it can ensure that even when the first hole edge area 11 of the first plate 1 is sheared, the force can still be transmitted between the first plate 1 and the second plate 2. Therefore, the present invention has the advantages of being able to buffer the impact force and having high connection reliability.

[0060] Embodiment 2

[0061] Based on the above Embodiment 1, the following preferred structure is further adopted in this Embodiment 2:

[0062] The first rigid weakening structure 1c is a discontinuous annular groove structure;

[0063] Among them, the discontinuous annular groove structure includes a plurality of slots k, and each slot k is uniformly arranged at intervals around the through hole on the plate where the connection hole b is formed;

[0064] As Figure 2 shown, for this Embodiment 2, that is: each slot k of the first rigid weakening structure 1c is uniformly arranged at intervals around the first through hole 1a of the first plate 1.

[0065] Embodiment 3

[0066] Based on the above Embodiment 1, the following preferred structure is further adopted in this Embodiment 3:

[0067] The first rigid weakening structure 1c is a star-shaped notch structure;

[0068] Among them, the star-shaped notch structure includes a plurality of notches q, each notch q communicates with the through hole on the plate where the connection hole b is formed and extends along the radial direction of the through hole, and each notch q is uniformly arranged at intervals around the through hole on the plate where the connection hole b is formed (the arrangement manner of the notch q relative to the through hole can refer to Figure 3 ).

[0069] For this Embodiment 3, that is: each notch q of the first rigid weakening structure 1c communicates with the first through hole 1a of the first plate 1 and extends along the radial direction of the first through hole 1a, and each notch q is uniformly arranged at intervals around the first through hole 1a of the first plate 1.

[0070] Embodiment 4

[0071] Based on the above Embodiment 1, the following preferred structure is further adopted in this Embodiment 4:

[0072] As Figures 1 to 3 shown, the energy-absorbing connection structure is further provided with a second reinforcing plate 5 having a second through hole 5a;

[0073] A second rigid weakening structure 2c is provided on the second plate 2, so that the second plate 2 is divided into a second hole-edge area 21 surrounding the second through hole 2a and a second peripheral area 22 other than the second hole-edge area 21. The second rigid weakening structure 2c can weaken the connection strength between the second hole-edge area 21 and the second peripheral area 22;

[0074] The second end 32 is a stepped structure composed of a second large-diameter portion 321 and a second small-diameter portion 322, and the second small-diameter portion 322 is attached to the second plate 2 within the second hole-edge area 21 of the second plate 2;

[0075] The second reinforcing plate 5 is sleeved on the second small-diameter portion 322 through the second through hole 5a, and the aperture of the second through hole 5a is larger than the outer diameter of the second small-diameter portion 322 and smaller than the outer diameter of the second large-diameter portion 321.

[0076] The working principle of the energy-absorbing connection structure of the fourth embodiment is as follows:

[0077] The energy-absorbing connection structure of the fourth embodiment can work according to the working principle of the first embodiment above. And on this basis, the fourth embodiment can also:

[0078] As Figure 4-4 shown, as the above Figure 4-3 working condition continues to develop, the acting force transmitted by the second small-diameter portion 322 of the second end 32 to the second plate 2 causes the second plate 2 to be subjected to a very large shear force. Since the second rigid weakening structure 2c weakens the connection strength between the second hole-edge area 21 and the second peripheral area 22 on the second plate 2, therefore, the connection between the second hole-edge area 21 and the second peripheral area 22 undergoes a large plastic deformation under the action of the shear force first, so that: the first hole-edge area 11 and the second hole-edge area 21 remain in contact under the clamping action of the first end 31 and the second end 32, while the second peripheral area 22 of the second plate 2 is gradually pulled away from the first peripheral area 12 of the first plate 1 due to being directly subjected to the acting force of the second small-diameter portion 322 until the second reinforcing plate 5 contacts both the second peripheral area 22 and the second large-diameter portion 321 (during this process, depending on the connection strength and the distance between the first large-diameter portion 311 and the second large-diameter portion 321, the connection between the second hole-edge area 21 and the second peripheral area 22 can either maintain a large plastic deformation or break), the tensile force F acting on the first plate 1 压, it is successively transmitted to the second plate 2 through the first peripheral region 12 of the first plate 1, the first reinforcing plate 4, the first large-diameter portion 311 of the first end 31, the first small-diameter portion 312 of the first end 31, the rod portion 33, the second end 32, and the second reinforcing plate 5, that is, it ensures that the acting force can still be transmitted between the first plate 1 and the second plate 2, and further ensures the connection reliability of the energy-absorbing connection structure of the present invention to the first plate 1 and the second plate 2.

[0079] Thus, for the energy-absorbing connection structure of the fourth embodiment, by using the characteristic that the connection strength between the second hole-edge region 21 and the second peripheral region 22 on the second plate 2 is weakened by the second rigid weakening structure 2c, the tensile force F is further absorbed through the plastic large deformation or even shear fracture of the second plate 2 拉 generated impact energy, so as to further buffer the relative movement between the first plate 1 and the second plate 2, and by using the second reinforcing plate 5, the transmission of the acting force between the first plate 1 and the second plate 2 can be ensured; therefore, the fourth embodiment further improves the buffering effect on the impact force and can ensure the connection reliability.

[0080] Embodiment Five

[0081] On the basis of the above-mentioned fourth embodiment, the fifth embodiment also adopts the following preferred structure:

[0082] Both the first rigid weakening structure 1c and the second rigid weakening structure 2c are intermittent annular groove structures;

[0083] Among them, the intermittent annular groove structure includes a plurality of slots k, and each of the slots k is evenly arranged at intervals around the through hole on the corresponding plate for forming the connection hole b.

[0084] As Figure 2 shown, for the fifth embodiment, that is:

[0085] Each of the slots k of the first rigid weakening structure 1c is evenly arranged at intervals around the first through hole 1a of the first plate 1.

[0086] Each of the slots k of the second rigid weakening structure 2c is evenly arranged at intervals around the second through hole 2a of the second plate 2.

[0087] Embodiment Six

[0088] On the basis of the above-mentioned fourth embodiment, the sixth embodiment also adopts the following preferred structure:

[0089] Both the first rigid weakening structure 1c and the second rigid weakening structure 2c are star-shaped notch structures;

[0090] Among them, the star-shaped notch structure includes a plurality of notches q, each of the notches q communicates with the through hole on the plate where it is located for forming the connection hole b and extends along the radial direction of the through hole, and the notches q are arranged at equal intervals around the through hole on the plate where it is located for forming the connection hole b.

[0091] As Figure 3 shown, for the sixth embodiment, that is:

[0092] Each of the notches q of the first rigid weakening structure 1c communicates with the first through hole 1a of the first plate 1 and extends along the radial direction of the first through hole 1a, and the notches q are arranged at equal intervals around the first through hole 1a of the first plate 1.

[0093] Each of the notches q of the second rigid weakening structure 2c communicates with the second through hole 2a of the second plate 2 and extends along the radial direction of the second through hole 2a, and the notches q are arranged at equal intervals around the second through hole 2a of the second plate 2.

[0094] Embodiment Seven

[0095] Based on the above-mentioned fourth embodiment, the seventh embodiment also adopts the following preferred structure:

[0096] The first rigid weakening structure 1c is a discontinuous annular groove structure, and the second rigid weakening structure 2c is a star-shaped notch structure;

[0097] Among them, the discontinuous annular groove structure includes a plurality of grooves k, and each of the grooves k is arranged at equal intervals around the through hole on the plate where it is located for forming the connection hole b;

[0098] The star-shaped notch structure includes a plurality of notches q, each of the notches q communicates with the through hole on the plate where it is located for forming the connection hole b and extends along the radial direction of the through hole, and the notches q are arranged at equal intervals around the through hole on the plate where it is located for forming the connection hole b.

[0099] As Figure 2 and Figure 3 shown, for the seventh embodiment, that is:

[0100] Each of the grooves k of the first rigid weakening structure 1c is arranged at equal intervals around the first through hole 1a of the first plate 1.

[0101] Each of the notches q of the second rigid weakening structure 2c communicates with the second through hole 2a of the second plate 2 and extends along the radial direction of the second through hole 2a, and the notches q are arranged at equal intervals around the second through hole 2a of the second plate 2.

[0102] Embodiment Eight

[0103] On the basis of the above-mentioned fourth embodiment, the following preferred structure is further adopted in the eighth embodiment:

[0104] The first rigid weakening structure 1c is a star-shaped notch structure, and the second rigid weakening structure 2c is a discontinuous annular groove structure;

[0105] Wherein, the discontinuous annular groove structure includes a plurality of slots k, and each of the slots k is uniformly arranged at intervals around the through hole on the plate where the connection hole b is formed;

[0106] The star-shaped notch structure includes a plurality of notches q, and each notch q communicates with the through hole on the plate where it is located for forming the connection hole b and extends along the radial direction of the through hole, and each notch q is uniformly arranged at intervals around the through hole on the plate where the connection hole b is formed.

[0107] As Figure 2 and Figure 3 shown, for the eighth embodiment, that is:

[0108] Each notch q of the first rigid weakening structure 1c communicates with the first through hole 1a of the first plate 1 and extends along the radial direction of the first through hole 1a, and each notch q is uniformly arranged at intervals around the first through hole 1a of the first plate 1.

[0109] Each slot k of the second rigid weakening structure 2c is uniformly arranged at intervals around the second through hole 2a of the second plate 2.

[0110] Embodiment Nine

[0111] On the basis of any one of the above-mentioned second, fifth, seventh, and eighth embodiments, the following preferred structure is further adopted in the ninth embodiment:

[0112] In the discontinuous annular groove structure, the shape enclosed by each slot k is the same as the shape of the end face of the small-diameter part in contact with the plate where it is located, and the shape enclosed by each slot k is centered on the center of the through hole on the plate where the connection hole b is formed. Thus, it is correspondingly ensured that the first small-diameter part 312 can be evenly transmitted to the first hole-edge area 11, ensuring that the connection between the first hole-edge area 11 and the first peripheral area 12 is most likely to be plastically deformed and sheared under the action of shear force; or, it is correspondingly ensured that the second small-diameter part 322 can be evenly transmitted to the second hole-edge area 21, ensuring that the connection between the second hole-edge area 21 and the second peripheral area 22 is most likely to be plastically deformed and sheared under the action of shear force.

[0113] For the above-mentioned second and seventh embodiments, that is: the shape enclosed by each slot k of the first rigid weakening structure 1c on the first plate 1 is the same as the shape of the end face of the first small-diameter part 312.

[0114] For the above-mentioned fifth embodiment, that is: the shape enclosed by each slot k of the first rigid weakening structure 1c on the first plate 1 is the same as the end face shape of the first small-diameter part 312; and, the shape enclosed by each slot k of the second rigid weakening structure 2c on the second plate 2 is the same as the end face shape of the second small-diameter part 322.

[0115] For the above-mentioned eighth embodiment, that is: the shape enclosed by each slot k of the second rigid weakening structure 2c on the second plate 2 is the same as the end face shape of the second small-diameter part 322.

[0116] In addition, the end faces of the above-mentioned first small-diameter part 312 and the second small-diameter part 322 can be designed into various shapes such as circular, hexagonal, and square.

[0117] Embodiment Ten

[0118] Based on any one of the above-mentioned second, fifth, seventh, eighth, and ninth embodiments, Embodiment Ten further adopts the following preferred structure:

[0119] For the intermittent annular groove structure, the edge of the small-diameter part in contact with the plate where the intermittent annular groove structure is located is pressed between the inner-diameter edge k1 and the outer-diameter edge k2 of each slot k. Thus, correspondingly, it can make the connection between the first hole-edge area 11 and the first peripheral area 12 more likely to undergo plastic large deformation and be sheared under the action of shear force; or, make the connection between the second hole-edge area 21 and the second peripheral area 22 more likely to undergo plastic large deformation and be sheared under the action of shear force.

[0120] For the above-mentioned second embodiment and seventh embodiment, that is: the edge of the first small-diameter part 312 is pressed between the inner-diameter edge k1 and the outer-diameter edge k2 of each slot k of the first rigid weakening structure 1c.

[0121] For the above-mentioned fifth embodiment, that is: the edge of the first small-diameter part 312 is pressed between the inner-diameter edge k1 and the outer-diameter edge k2 of each slot k of the first rigid weakening structure 1c; and, the edge of the second small-diameter part 322 is pressed between the inner-diameter edge k1 and the outer-diameter edge k2 of each slot k of the second rigid weakening structure 2c.

[0122] For the above-mentioned eighth embodiment, that is: the edge of the second small-diameter part 322 is pressed between the inner-diameter edge k1 and the outer-diameter edge k2 of each slot k of the second rigid weakening structure 2c.

[0123] Embodiment Eleven

[0124] Based on any one of the above-mentioned third, sixth, seventh, and eighth embodiments, Embodiment Eleven further adopts the following preferred structure:

[0125] In the star-shaped notch structure, the width of each notch q gradually increases outward from the through hole on the plate for forming the connection hole b. Thus, the strength of the plate reaches the minimum at the outer ends of each notch q, and the plate forms the above-mentioned hole-edge region with the outer ends of each notch q as the boundary.

[0126] Embodiment Twelve

[0127] Based on any one of the above-mentioned Embodiments One to Eleven, Embodiment Twelve also adopts the following preferred structure:

[0128] The connecting member 3 is formed by connecting a bolt and a nut. The first end 31, the second end 32, and the rod portion 33 are successively the bolt head of the bolt, the nut, and the screw rod of the bolt, or the first end 31, the second end 32, and the rod portion 33 are successively the nut, the bolt head of the bolt, and the screw rod of the bolt.

[0129] Embodiment Thirteen

[0130] Based on any one of the above-mentioned Embodiments One to Twelve, Embodiment Thirteen also adopts the following preferred structure:

[0131] The first reinforcing plate 4 is welded to the first plate 1, and the second reinforcing plate 5 is welded to the second plate 2. Thus, the connection reliability between the first plate 1 and the second plate 2 is further improved, and the anti-disengagement safety factor is increased.

[0132] Embodiment Fourteen

[0133] Embodiment Fourteen discloses an automobile seat connection structure, which includes an automobile seat 6 and a seat mounting substrate 7. The front-end plate 61 of the seat cushion skeleton of the automobile seat 6 and the seat mounting substrate 7 are connected by a connection structure.

[0134] The connection structure is the energy-absorbing connection structure described in any one of the above-mentioned Embodiments One to Thirteen; the front-end plate 61 of the seat cushion skeleton of the automobile seat 6 is the first plate 1 of the energy-absorbing connection structure, and the seat mounting substrate 7 is the second plate 2 of the energy-absorbing connection structure.

[0135] The working principle of the automobile seat connection structure of the present invention is as follows:

[0136] Under the condition that the vehicle is driving normally, the passenger is sitting normally on the automobile seat 6. The front-end structure of the seat cushion of the automobile seat 6 is subjected to the weight pressure of the occupant, and the energy-absorbing connection structure in the automobile seat connection structure is in the above Figure 1In the described working state, the cushion of the vehicle seat 6 transmits pressure to the seat mounting substrate 7 through the first plate 1 and the second plate 2 in direct contact. The pressure is small, and no concentrated force will be generated at the connection hole b. The risk of strength failure of the energy-absorbing connection structure at the connection hole b is very low.

[0137] As Figure 5-1 shown, when the vehicle has just been rear-ended and collided, due to inertia, the occupant impacts the backrest of the vehicle seat 6 backward, and the backrest receives a very large backward impact force F. Due to the structure and fixing method of the vehicle seat 6, at this time, the vehicle seat 6 begins to rotate backward and deform around the rear connection point P1, so that the front connection point P2 is subjected to a very large upward concentrated tensile force; therefore, the energy-absorbing connection structure in the vehicle seat connection structure is in the above Figure 4-1 described working state.

[0138] As Figure 5-2 shown, as the time of the rear-end collision of the vehicle progresses, the vehicle seat 6 continues to rotate backward and deform around the rear connection point P1, so that the energy-absorbing connection structure in the vehicle seat connection structure gradually changes from the above Figure 4-1 shown working state to the above Figure 4-2 , Figure 4-3 and Figure 4-4 described working states in sequence.

[0139] Therefore, the vehicle seat connection structure of the present invention realizes the connection between the front-end plate 61 of the bottom surface of the cushion frame of the vehicle seat 6 and the seat mounting substrate 7 by using an energy-absorbing connection structure, and uses the energy-absorbing connection structure to buffer the impact force received by the vehicle seat 6 when the vehicle is rear-ended and collided. On the one hand, it effectively buffers the impact force between the occupant and the backrest. On the other hand, it reduces the structural deformation of the vehicle seat 6 and can also effectively reduce the injury suffered by the occupant due to the deformation of the seat frame; and, by using the specific feature of the high connection reliability of the energy-absorbing connection structure, it can also ensure the connection integrity between the vehicle seat 6 and the seat mounting substrate 7.

[0140] In addition, the above first reinforcing plate 4 and second reinforcing plate 5 are preferably made of a relatively thick high-strength material to ensure that they have sufficient strength to withstand the impact force. In the automotive industry, the thickness of the reinforcing plate is generally 2 mm or more than 2.5 mm, and the strength of the reinforcing plate is generally above 500 Mpa yield.

[0141] The present invention is not limited to the above specific embodiments. Based on the above content, according to the common general technical 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. For example, the connecting member 3 can also be a structure formed by riveting the first plate 1 and the second plate 2 with rivets; another example is that the connecting member 3 can also be formed by welding the two ends of the rod portion 33 to the first end 31 and the second end 32 respectively; still another example is that the first rigidity weakening structure 1c and the second rigidity weakening structure 2c can also adopt other forms of weakening structures, such as opening a plurality of round holes, opening non-penetrating grooves, etc., as long as it is ensured that the plate is divided into a hole edge area and a peripheral area with appropriate positions, shapes and sizes.

Claims

1. An energy-absorbing connection structure for connecting a first plate (1) and a second plate (2); the energy-absorbing connection structure is provided with a connecting member (3), and the connecting member (3) has a first end (31), a second end (32), and a rod portion (33) connected between the first end (31) and the second end (32); The first plate (1) and the second plate (2) are respectively provided with a first through hole (1a) and a second through hole (2a). The first plate (1) and the second plate (2) are attached to each other so that the first through hole (1a) and the second through hole (2a) communicate to form a connection hole (b). The rod portion (33) of the connecting member (3) passes through the connection hole (b), so that the first plate (1) and the second plate (2) are clamped between the first end (31) and the second end (32) of the connecting member (3); It is characterized in that: The energy-absorbing connection structure is further provided with a first reinforcing plate (4) having a first through hole (4a); A first rigid weakening structure (1c) is provided on the first plate (1), so that the first plate (1) is divided into a first hole-edge area (11) surrounding the first through hole (1a) and a first peripheral area (12) other than the first hole-edge area (11). The first rigid weakening structure (1c) can weaken the connection strength between the first hole-edge area (11) and the first peripheral area (12); The first end (31) is a stepped structure composed of a first large-diameter portion (311) and a first small-diameter portion (312), and the first small-diameter portion (312) is attached to the first plate (1) within the first hole-edge area (11) of the first plate (1); The first reinforcing plate (4) is sleeved on the first small-diameter portion (312) through the first through hole (4a), and the diameter of the first through hole (4a) is larger than the outer diameter of the first small-diameter portion (312) and smaller than the outer diameter of the first large-diameter portion (311); The first rigid weakening structure (1c) is a discontinuous annular groove structure or a star-shaped notch structure; Among them, the discontinuous annular groove structure includes a plurality of grooves (k), and each of the grooves (k) is uniformly arranged at intervals around the through hole on the plate where the connection hole (b) is formed; The star-shaped notch structure includes a plurality of notches (q), and each notch (q) communicates with the through hole on the plate where the connection hole (b) is formed and extends along the radial direction of the through hole, and the notches (q) are uniformly arranged at intervals around the through hole on the plate where the connection hole (b) is formed; The energy-absorbing connection structure is further provided with a second reinforcing plate (5) having a second through hole (5a); A second rigid weakening structure (2c) is provided on the second plate (2), such that the second plate (2) is divided into a second hole-edge area (21) surrounding the second through-hole (2a) and a second peripheral area (22) other than the second hole-edge area (21), and the second rigid weakening structure (2c) can weaken the connection strength between the second hole-edge area (21) and the second peripheral area (22); The second end (32) is a stepped structure composed of a second large-diameter portion (321) and a second small-diameter portion (322), and the second small-diameter portion (322) is in contact with the second plate (2) within the second hole-edge area (21) of the second plate (2); The second reinforcing plate (5) is sleeved on the second small-diameter portion (322) through the second through-hole (5a), and the diameter of the second through-hole (5a) is larger than the outer diameter of the second small-diameter portion (322) and smaller than the outer diameter of the second large-diameter portion (321).

2. The energy-absorbing connection structure according to claim 1, characterized in that: The first rigid weakening structure (1c) and the second rigid weakening structure (2c) are both intermittent annular groove structures, or both are star-shaped notch structures, or one of them is an intermittent annular groove structure and the other is a star-shaped notch structure; Wherein, the intermittent annular groove structure includes a plurality of slots (k), and each of the slots (k) is evenly spaced around the through-hole on the plate where the connection hole (b) is formed; The star-shaped notch structure includes a plurality of notches (q), each of the notches (q) communicates with the through-hole on the plate where the connection hole (b) is formed and extends along the radial direction of the through-hole, and the notches (q) are evenly spaced around the through-hole on the plate where the connection hole (b) is formed.

3. The energy-absorbing connection structure according to claim 1 or 2, characterized in that: In the intermittent annular groove structure, the shape surrounded by each of the slots (k) is the same as the shape of the end face of the small-diameter portion in contact with the plate where it is located, and the shape surrounded by each of the slots (k) is centered on the center of the through-hole on the plate where the connection hole (b) is formed.

4. The energy-absorbing connection structure according to claim 3, characterized in that: For the intermittent annular groove structure, the edge of the small-diameter portion in contact with the plate where the intermittent annular groove structure is located is pressed between the inner diameter edge (k1) and the outer diameter edge (k2) of each of the slots (k).

5. The energy-absorbing connection structure according to claim 1 or 2, characterized in that: In the star-shaped notch structure, the width of each of the notches (q) gradually increases outward from the through-hole on the plate where the connection hole (b) is formed.

6. The energy-absorbing connection structure according to claim 1 or 2, characterized in that: The described connecting member (3) is formed by connecting a bolt and a nut. The first end (31), the second end (32), and the rod portion (33) are, in sequence, the bolt head of the bolt, the nut, and the screw of the bolt, or the first end (31), the second end (32), and the rod portion (33) are, in sequence, the nut, the bolt head of the bolt, and the screw of the bolt.

7. The energy-absorbing connection structure according to claim 1, characterized in that: The first reinforcing plate (4) is welded to the first plate (1), and the second reinforcing plate (5) is welded to the second plate (2).

8. An automotive seat connection structure, comprising an automotive seat (6) and a seat mounting substrate (7), and a front-end plate (61) on the bottom surface of the seat cushion skeleton of the automotive seat (6) is connected to the seat mounting substrate (7) through a connection structure; characterized in that: The connection structure is the energy-absorbing connection structure according to any one of claims 1 to 7; the front-end plate (61) on the bottom surface of the seat cushion skeleton of the automotive seat (6) is the first plate (1) of the energy-absorbing connection structure, and the seat mounting substrate (7) is the second plate (2) of the energy-absorbing connection structure.

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