CN111516569A - A car rear seat frame capable of collapsing and absorbing energy - Google Patents

Abstract

The invention discloses an automobile rear seat frame capable of collapsing and absorbing energy. By setting at least one of the backrest frame and the seat cushion frame as a collapsible energy-absorbing frame provided with a collapsible energy-absorbing structure, in a storage state It can absorb the collision energy through deformation, so that the rotating shaft will not be deformed and broken due to the excessive impact force in the rear collision of the car, which solves the rear collision safety hazard of the rear seat frame of the car; and due to the rear collision energy It can be absorbed, which reduces the strength requirement for the frame of the rear seat of the automobile. Therefore, the present invention can also have lower gravity and cost. In addition, the present invention adopts the combination of the transverse member, the two longitudinal members, the force transmission bump and the structural weakening point to form the crushing energy-absorbing structure of the crushing energy-absorbing frame, and realizes the deformation of the rear seat frame of the automobile in the stored state. way to absorb collision energy.

Description

A car rear seat frame capable of collapsing and absorbing energy

technical field

The invention relates to a car seat, in particular to a car rear seat frame capable of collapsing and absorbing energy.

Background technique

With the improvement of people's living standards, people put forward higher requirements for the safety of automobiles. As an important safety part of the car, the safety of its skeleton is very important.

The commonly used car rear seat frame that can be folded and stored includes a backrest frame and a cushion frame that are both fixedly connected to the rotating shaft, and the backrest frame is provided with an angle adjuster, and the rotating shaft can be rotatably installed on the vehicle body fixed. on the support; the way that the car rear seat frame is converted from the use state to the storage state is: the backrest frame first flips forward through the angle adjuster, so that the backrest and seat cushion of the car rear seat are turned forward. In a state of stacking up and down, the backrest frame and the seat cushion frame are turned over backward together through the rotating shaft.

The above-mentioned existing vehicle rear seat frame has the following rear-collision safety hazards:

Referring to Figure 3, when the rear seat frame of the car is in the retracted state, if the car is in a rear collision, the entire seat will be subjected to the forward squeezing force generated by the collision, making the entire seat tend to move forward. In this case, the rotating shaft will be broken due to excessive deformation, resulting in the separation of the backrest frame and the seat cushion frame from the support, and the entire seat moves forward rapidly, causing fatal injuries to the front row passengers or the front car parts such as the battery.

In the prior art, the above-mentioned rear-collision safety hazards are overcome by increasing the strength of the car rear seat frame, but the high-strength seats often use a lot of materials, resulting in a substantial increase in the weight and cost of the car seat.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a car rear seat frame that can collapse and absorb energy, so as to solve the problem that the existing car rear seat frame cannot take into account both the hidden danger of rear collision and the increase in the weight and cost of the seat frame. high question.

To solve the above-mentioned technical problems, the technical scheme adopted in the present invention is as follows:

An automobile rear seat frame capable of collapsing and absorbing energy includes a backrest frame and a seat cushion frame fixedly connected with a rotating shaft, wherein the backrest frame is provided with an angle adjuster, and the rotating shaft can be rotatably installed on a fixed position with the vehicle body. on the support of the automobile rear seat; the way that the rear seat frame of the automobile is converted from the use state to the storage state is: the backrest frame is turned forward by the angle adjuster, and the backrest frame and the seat cushion frame together pass through the The rotating shaft overturns backwards;

It is characterized by:

At least one of the backrest frame and the seat cushion frame is a crushing energy-absorbing frame provided with a crushing energy-absorbing structure, so that: when the rear seat frame of the automobile is in the storage state and the vehicle is in a rear collision , the collapsed energy-absorbing structure deforms the collapsed energy-absorbing framework under the action of collision energy, so as to absorb the collision energy.

Therefore, the vehicle rear seat frame of the present invention can absorb the collision energy by deforming in the stored state, so that the rotating shaft will not be deformed and broken due to the excessive impact force in the rear collision of the vehicle, and solve the problem of solving the problem of the rear row of the vehicle. The rear collision safety hazard of the seat frame; and since the rear collision energy can be absorbed, the strength requirement for the rear seat frame of the automobile is reduced, so the present invention can also have lower gravity and cost.

Preferably: the collapsed energy-absorbing structure of the collapsed energy-absorbing framework is:

The crushing energy-absorbing frame has a transverse piece and two longitudinal pieces, the head ends of the two longitudinal pieces are respectively connected to the two ends of the transverse piece, and the tail ends can transmit the force to the rotating shaft;

In addition, as far as the rear seat frame of the automobile is in the storage state, the transverse member is fixed with a rearwardly protruding force-conducting bump at its non-end position, and the force-conducting bump is at least partially located in the rearmost position of the collapsed energy absorbing framework; at least one of the two longitudinal members is formed with a structural weakening point.

Therefore, the working principle of the above-mentioned preferred collapsible energy-absorbing structure is as follows:

When the vehicle rear seat frame is in the storage state and the vehicle is in a rear collision, the effect of the rear collision energy on the rear seat of the vehicle can be moved forward and squeezed by a rigid fixture block located behind the seat Seat to simulate:

Since the force-conducting bump is at least partially located at the rearmost position of the collapsed energy-absorbing frame, and is located at the non-end position of the transverse member, the rigid fixture block extruded forward first acts on the force-conducting bump, and the rigidity The extrusion force of the jig block extrudes the transverse member to the forward bending deformation through the force transmission bump, and the dotted line E1' in the figure represents the transverse member after bending and deforming forward; The transverse member exerts a diagonal pulling force on the head ends of the two longitudinal members, and the diagonal pulling force must contain a force component in the left and right directions, so that the corresponding longitudinal members are left and right at the structural weakening point under the action of the diagonal pulling force. Bending deformation in the direction to absorb the rear collision energy; and when the rigid jig block continues to move forward to contact the head ends of the two longitudinal members, the rigid jig block exerts a forward thrust on the head ends of the two longitudinal members , so that the corresponding longitudinal parts continue to undergo bending deformation under the action of the thrust, so as to continue to absorb the rear collision energy, until the rigid fixture block stops moving, that is, the rear collision energy acting on the rear seats of the car is completely absorbed. .

Therefore, it is realized that the rear seat frame of the automobile absorbs the collision energy through deformation in the storage state.

As a preferred embodiment of the present invention: as far as the rear seat frame of the automobile is in the storage state, the longitudinal member of the collapse energy-absorbing frame adopts one of the following two ways to form the structural weakening point:

Mode 1, the transverse member is a pipe member extending in the left-right direction, the longitudinal member is a plate member with flanged edges on both sides, and the longitudinal member is composed of an outwardly bent front portion, an outwardly bent middle portion, and an outwardly bent back portion that are connected in sequence. The outer curved front part is welded and fixed to the transverse member, the outward curved rear part can transmit force to the rotating shaft, and the outward curved front part and the outward curved rear part both extend in the front-rear direction, so The outwardly bent middle portion is arranged obliquely, and the distance between the outwardly bent front portions of the two longitudinal members is greater than the distance between the outwardly bent rear portions of the two longitudinal members; so that: the outwardly bent middle portion and the outwardly bent rear portion The connection of the external bending structure forms a weakening point;

In addition, a front reinforcing plate and a rear reinforcing plate are welded on the flanges on both sides of the longitudinal member, the front reinforcing plate and the rear reinforcing plate respectively form a cavity with the longitudinal member, and the front reinforcing plate and the There is a gap at the front part of the outward bending left between the rear reinforcing plates, so that: the gap forms a weakening point of the gap structure;

Mode 2: The transverse member is a pipe member extending in the left-right direction, the longitudinal member is a plate member with flanged edges on both sides, and the longitudinal member is composed of an inwardly curved front portion, an inwardly curved middle portion, and an inwardly curved back portion that are connected in sequence. The inwardly curved front portion is welded and fixed to the transverse member, the inwardly curved rear portion can transmit a force to the rotating shaft, and both the inwardly curved front portion and the inwardly curved rear portion extend in the front-rear direction, so The inwardly bent middle portion is arranged obliquely, and the distance between the inwardly bent front portions of the two longitudinal members is smaller than the distance between the inwardly bent rear portions of the two longitudinal members; so that: the inwardly bent middle portion and the inwardly bent rear portion The junction of the inwardly curved structure forms a weakening point.

The working principle of the above method 1 is as follows:

Referring to FIGS. 5 and 6 , when the rear seat frame of the automobile is in the stowed state and the automobile has a rear collision, the effect of the rear collision energy on the rear seat of the automobile can be a rigid fixture located behind the seat. Move the block forward and squeeze the seat to simulate:

Since the force-conducting bump is at least partially located at the rearmost position of the collapsed energy-absorbing frame, and is located at the non-end position of the transverse member, the rigid fixture block extruded forward first acts on the force-conducting bump, and the rigidity The extrusion force of the jig block extrudes the transverse member to the forward bending deformation through the force transmission bump, and the dotted line E1' in the figure represents the transverse member after bending and deforming forward; The transverse member exerts a diagonal pulling force on the outwardly curved front parts of the two longitudinal members, and the diagonal pulling force must contain a force component in the left and right directions, so that: Bending deformation occurs at the structural weakening point to absorb the rear collision energy; wherein, the specific method of the aforementioned bending deformation is: the longitudinal member protrudes outward at the structural weakening point of the gap, and the longitudinal member and the rear reinforcing plate are located in the gap. The part between the structural weakening point and the external bending structural weakening point rotates and bends outward around the external bending structural weakening point; and when the rigid fixture block continues to move forward to contact the head ends of the two longitudinal members, the rigid fixture block A forward thrust is applied to the head ends of the two longitudinal members, so that the corresponding longitudinal members continue to undergo the aforementioned bending deformation at the weakening point of the gap structure and the weakening point of the outward bending structure under the action of the thrust, so as to continue to absorb the rear collision energy. , until the rigid fixture block stops moving, that is, the rear collision energy acting on the rear seat of the car is completely absorbed.

Therefore, it is realized that the rear seat frame of the automobile absorbs the collision energy by deforming in the stored state, which has the advantage of high energy absorption efficiency. Moreover, the cooperation of the two structural weakening points can absorb more collision energy and improve the collapse absorption rate. upper limit of energy.

The working principle of the second method is as follows:

Referring to FIGS. 5 and 6 , when the rear seat frame of the automobile is in the stowed state and the automobile has a rear collision, the effect of the rear collision energy on the rear seat of the automobile can be a rigid fixture located behind the seat. Move the block forward and squeeze the seat to simulate:

Since the force-conducting bump is at least partially located at the rearmost position of the collapsed energy-absorbing frame, and is located at the non-end position of the transverse member, the rigid fixture block extruded forward first acts on the force-conducting bump, and the rigidity The extrusion force of the fixture block extrudes the transverse member to the forward bending deformation through the force transmission bump, and the dotted line E1" in the figure represents the transverse member after forward bending and deformation; thus, the transverse member after forward bending deformation The member exerts an oblique pulling force on the inwardly bent front parts of the two longitudinal members, and the diagonal pulling force must contain a force component in the left and right directions, so that: under the action of the diagonal pulling force, the longitudinal members are all bent at the weakening point of the inwardly bent structure. Bending deformation to absorb the rear collision energy; wherein, the specific way of the aforementioned bending deformation is: the inward bending front part and the inward bending middle part of the longitudinal member are rotated and bent inward around the weakening point of the inward bending structure; and when the rigid fixture block continues When moving forward to contact the head ends of the two longitudinal members, the rigid fixture block exerts a forward thrust on the head ends of the two longitudinal members, so that the corresponding longitudinal members are at the weakening point of the inward bending structure under the action of the thrust The aforementioned bending deformation continues to absorb the rear collision energy until the rigid fixture block stops moving, that is, the rear collision energy acting on the rear seat of the vehicle is completely absorbed.

Therefore, it is realized that the rear seat frame of the automobile absorbs the collision energy through deformation in the storage state, and has the advantage of high energy absorption efficiency.

Preferably: for the first method, the angle between the middle part of the outward bending and the rear part of the outward bending is between 135° and 170°; for the second method, the angle between the middle part of the inner bending and the rear part of the inner bending is between 135° and 170°; The angle between them is between 135° and 170°. Therefore, the efficiency of the pressing force transmission can be improved, so as to improve the energy absorption efficiency of the collision energy.

Preferably: for the first method, the position where the weakened point of the gap structure is located is the position where the cross section of the longitudinal member is the smallest. Therefore, the longitudinal member is induced to bend at the weakening point of the gap structure by means of changing the cross section, so as to improve the reliability of energy absorption.

Preferably: for the first method, the longitudinal member and the rear reinforcing plate are provided with weakened holes at the weakened points of the outwardly curved structure. Therefore, the longitudinal member is induced to bend at the weakened point of the outwardly curved structure through the weakened hole, thereby improving the reliability of energy absorption.

Preferably: the flange of the longitudinal piece at its head end is welded to the transverse piece.

Preferably: for the first method, the gap between the front reinforcing plate and the rear reinforcing plate may be located at the junction of the outer curved front part and the outer curved middle part, but it is preferably located in the middle of the outer curved front part, so as to Make sure that the weak points of the gap structure are not easily deformed during normal use of the car seat.

As a preferred embodiment of the present invention: the vehicle rear seat frame adopts the following structural forms:

The backrest frame is provided with a backrest upper tube, two backrest side panels, two of the angle adjusters, two backrest connecting plates and a backrest lower tube; the seat cushion frame is provided with a seat cushion front tube, two seat cushion side panels and The seat cushion rear tube; the seat cushion rear tube is rotatably installed on the support as the rotating shaft, and the two ends of the seat cushion front tube are respectively welded and fixed with one end of the two seat cushion side plates. The other end of the plate is welded and fixed with the seat cushion rear pipe respectively; the two backrest connecting plates are respectively connected with the two seat cushion side plates by bolts, and one end of the two backrest side plates is respectively adjusted through the two The device is installed on the two backrest connecting plates, the other ends of the two backrest side plates are welded and fixed to the two ends of the backrest upper tube, and the two ends of the backrest lower tube are welded to the two backrests respectively. the inwardly curved rear part of the side panel;

In addition, the backrest frame and the seat cushion frame are both used as the crushing energy-absorbing frame, wherein the backrest upper tube of the backrest frame and the seat cushion front tube of the seat cushion frame are both used as the transverse member, and the backrest frame The two backrest side panels and the two seat cushion side panels of the seat cushion frame are both used as the longitudinal members; the backrest side panels of the backrest frame use the second method to form the weakening point of the inwardly curved structure; The side plate of the seat cushion adopts the above method to form the weakened point of the gap structure and the weakened point of the outward curved structure.

Therefore, the present invention can not only realize that the rear seat frame of the automobile absorbs the collision energy by deforming in the storage state, but also can realize the actual working conditions of the backrest and the seat cushion of the automobile seat during normal use. The reinforcing plate improves the strength of the seat cushion frame at the front and rear, and while meeting the strength requirements of the car seat in normal use, the weight and cost of the car seat are controlled to the maximum extent. Therefore, the invention has the advantages of good energy absorption effect and high reliability. In addition, compared with the rear seat of the car that does not solve the hidden danger of rear collision, its weight and cost increase is small. reduce.

Preferably: the backrest frame is provided with two force conduction bumps, and the two force conduction bumps are symmetrically arranged with the center line of the backrest frame as the symmetry line; the seat cushion frame is provided with one force conduction bump and a bump, the force conducting bump is centrally arranged on the front tube of the seat cushion.

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

First, in the present invention, by setting at least one of the backrest frame and the seat cushion frame as a collapsible energy-absorbing frame with a collapsible energy-absorbing structure, in the stored state, the collision energy can be absorbed by deformation, so that the rotating shaft is In the rear collision of the car, it will not be deformed and broken due to the excessive impact force, which solves the hidden danger of rear collision safety of the rear seat frame of the car; and because the rear collision energy can be absorbed, the damage to the rear seat frame of the car is reduced. strength requirements, therefore, the present invention can also combine lower gravity and cost.

Second, the present invention adopts the combination of a transverse member, two longitudinal members, a force transmission bump and a structural weakening point to form a crushing energy-absorbing structure of the crushing energy-absorbing frame, which realizes the passage of the rear seat frame of the automobile in the stored state. Deformation absorbs collision energy.

Third, the present invention adopts the first method to form the weakened point of the gap structure and the weakened point of the outward bending structure on the longitudinal member of the crushing energy-absorbing frame, so that the rear seat frame of the automobile can absorb the collision energy by deforming in the storage state. , has the advantage of high energy absorption efficiency, and the combination of two structural weakening points can absorb more collision energy and increase the upper limit of collapse energy absorption.

Fourth, the present invention adopts the second method to form the weakening point of the inward bending structure on the longitudinal member of the collapsed energy-absorbing frame, so that the rear seat frame of the automobile can absorb the collision energy through deformation in the stored state, and has energy-absorbing efficiency high advantage.

Fifth, the present invention is directed to the rear seat frame of the automobile with the specific structural form shown in the accompanying drawings. Weak point, the first method is used to form the weakening point of the gap structure and the weakening point of the outward bending structure on the side plate of the seat cushion, which can not only realize the deformation of the rear seat frame of the car in the stowed state to absorb the collision energy, but also can target the car seat. The actual working conditions of the seat back and seat cushion in normal use, the strength of the seat cushion frame at the front and rear is improved through the front and rear reinforcement plates, while meeting the strength requirements of the car seat in normal use, the maximum control of the car seat Therefore, the present invention has the advantages of good energy absorption effect and high reliability, and, compared with the rear seat of the car that does not solve the safety hazard of rear collision, the increase in weight and cost is small. The weight and cost of the rear seat of the car, which can improve the strength and solve the hidden danger of rear collision, are greatly reduced.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

FIG. 1 is a schematic structural diagram of the vehicle rear seat frame of the present invention in a use state;

2 is a schematic exploded view of the structure of the vehicle rear seat frame of the present invention;

FIG. 3 is a side view of the vehicle rear seat frame of the present invention in a storage state;

FIG. 4 is a top view of the vehicle rear seat frame of the present invention in a storage state;

FIG. 5 is a schematic diagram of the force of the vehicle rear seat frame of the present invention when the vehicle is in a rear collision;

FIG. 6 is a schematic diagram of the force of the crumpling energy-absorbing skeleton in the present invention when the vehicle collides.

Detailed ways

The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings, to help those skilled in the art to better understand the inventive concept of the present invention, but the protection scope of the claims of the present invention is not limited to the following embodiments, and it is not limited to the following embodiments. As far as personnel are concerned, without departing from the inventive concept of the present invention, all other embodiments obtained without creative work fall within the protection scope of the present invention.

Example 1

As shown in FIGS. 1 to 6 , the present invention discloses a rear seat frame of an automobile capable of collapsing and absorbing energy, including a backrest frame A and a seat cushion frame B that are both fixedly connected to a rotating shaft C, and the backrest frame A is provided with a recliner A3, and the rotating shaft C can be rotatably mounted on the support D fixed to the vehicle body; the way that the rear seat frame of the vehicle is converted from the use state to the storage state is: the backrest frame A First flip forward through the angle adjuster A3, so that the backrest and seat cushion of the rear seat of the car are in a state of stacking up and down, and then the backrest frame A and the seat cushion frame B are flipped backward together through the rotating shaft C ;

Wherein, the rotating shaft C can be a seat cushion back tube that constitutes the frame of the seat cushion frame B, and the two ends of the seat cushion back tube are respectively protruding left and right and are rotatably connected to the support D; the rotating shaft C can also be welded separately. Two rotating shaft members on the left and right sides of the seat cushion frame B. The rotating shaft C is preferably rotatably mounted on the support D through a bushing.

At least one of the back frame A and the seat cushion frame B is a crushing energy-absorbing frame E provided with a crushing energy-absorbing structure, so that: when the vehicle rear seat frame is in the stored state and the vehicle During a post-collision, the collapsible energy absorbing structure deforms the collapsible energy absorbing skeleton E under the action of the collision energy, so as to absorb the collision energy.

Therefore, the vehicle rear seat frame of the present invention can absorb the collision energy by deforming in the stored state, so that the rotating shaft C will not be deformed and broken due to the excessive impact force in the rear collision of the vehicle, thus solving the problem of solving the problem of the vehicle rear seat frame. The rear collision safety hazard of the row seat frame; and because the rear collision energy can be absorbed, the strength requirement for the rear seat frame of the automobile is reduced, so the present invention can also have lower gravity and cost.

The above is the basic implementation of the first embodiment, which can be further optimized, improved and limited on the basis of this basic implementation:

Preferably: the collapsed energy-absorbing structure of the collapsed energy-absorbing framework E is:

The collapsible energy-absorbing frame E has a transverse member E1 and two longitudinal members E2, the head ends of the two longitudinal members E2 are respectively connected to the two ends of the transverse member E1, and the rear ends can transmit the transmission to the rotating shaft C. force;

In addition, as far as the rear seat frame of the automobile is in the storage state, the transverse member E1 is fixed with a rearwardly protruding force conduction bump E3 at its non-end position, and the force conduction bump E3 At least partially at the rearmost position of the collapsed energy-absorbing framework E; at least one of the two longitudinal members E2 is formed with a structural weakening point.

Wherein, the above-mentioned crushing energy-absorbing structure is not limited to be applied to the backrest frame A or seat cushion frame B of a specific structural form, as long as the backrest frame A or seat cushion frame B of the corresponding structural form has the cross member E1 and the two Longitudinal piece E2 is sufficient.

Therefore, the working principle of the above-mentioned preferred collapsible energy-absorbing structure is as follows:

Referring to FIG. 6 , when the rear seat frame of the automobile is in the stowed state and the automobile is in a rear collision, the effect of the rear collision energy on the rear seat of the automobile can be directed by a rigid fixture block G located behind the seat. Move forward and squeeze the seat to simulate:

Since the force-conducting protrusion E3 is at least partially located at the rearmost position of the collapsed energy-absorbing frame E, and is located at the non-end position of the transverse member E1, the rigid fixture block G pressed forward first acts on the force-conducting protrusion On the block E3, the extrusion force of the rigid fixture block G pushes the transverse member E1 to the forward bending deformation through the force transmission bump E3. The dotted line E1' in the figure represents the transverse member E1 after the forward bending deformation. ; Thereby, the transverse member E1 after the forward bending deformation exerts a diagonal pulling force F1 on the head ends of the two longitudinal members E2, and the diagonal pulling force F1 must contain the force component in the left and right directions, so that the corresponding longitudinal member E2 is in the diagonal direction. Under the action of the tensile force F1, bending deformation occurs in the left and right directions at the structural weakening point to absorb the rear collision energy; and when the rigid fixture block G continues to move forward to contact the head ends of the two longitudinal members E2, The rigid fixture block G applies a forward thrust F2 to the head ends of the two longitudinal members E2, so that the corresponding longitudinal members E2 continue to undergo bending deformation under the action of the thrust F2, so as to continue to absorb the rear collision energy until the rigid Block G stops moving, that is, the rear collision energy acting on the rear seat of the car is completely absorbed.

Therefore, it is realized that the rear seat frame of the automobile absorbs the collision energy through deformation in the storage state.

Embodiment 2

Referring to FIG. 1 to FIG. 5 , on the basis of the above-mentioned first embodiment, the second embodiment also adopts the following preferred embodiments:

As far as the rear seat frame of the automobile is in the stowed state, the longitudinal member E2 of the crushing energy-absorbing frame E adopts one of the following two ways to form the structural weakening point:

Mode 1, the transverse member E1 is a pipe member extending in the left-right direction, the longitudinal member E2 is a plate member with flanged edges on both sides, and the longitudinal member E2 consists of an outwardly curved front portion E21 and an outwardly curved middle portion that are connected in turn. The E22 is formed by an outwardly curved rear portion E23, the outwardly curved front portion E21 is welded and fixed to the transverse member E1, the outwardly curved rear portion E23 can transmit force to the rotating shaft C, and the outwardly curved front portion E21 and The outwardly curved rear portions E23 all extend in the front-rear direction, the outwardly curved middle portion E22 is arranged obliquely, and the distance between the outwardly curved front portions E21 of the two longitudinal members E2 is greater than the outwardly curved rear portions E23 of the two longitudinal members E2 The distance between; such that: the junction of the outwardly curved middle portion E22 and the outwardly curved rear portion E23 forms the outwardly curved structural weakening point P2;

In addition, the longitudinal member E2 is welded with a front reinforcement plate E4 and a rear reinforcement plate E5 on the flanges on both sides thereof, and the front reinforcement plate E4 and the rear reinforcement plate E5 respectively surround the longitudinal member E2 to form a lumen, and A gap at the outwardly curved front portion E21 is left between the front reinforcing plate E4 and the rear reinforcing plate E5, so that: a gap structure weakening point P1 is formed at the gap;

Mode 2, the transverse member E1 is a pipe member extending in the left-right direction, the longitudinal member E2 is a plate member with flanged edges on both sides, and the longitudinal member E2 consists of an inwardly curved front portion E24 and an inwardly curved middle portion that are connected in sequence. The E25 and the inwardly curved rear portion E26 are formed. The inwardly curved front portion E24 is welded and fixed to the transverse member E1. The inwardly curved rear portion E26 can transmit force to the rotating shaft C. The inwardly curved front portion E24 and The inwardly curved rear portions E26 all extend in the front-rear direction, the inwardly curved middle portions E25 are arranged obliquely, and the distance between the inwardly curved front portions E24 of the two longitudinal members E2 is smaller than the inwardly curved rear portions E26 of the two longitudinal members E2 The distance between them is such that: the connection between the inwardly curved middle portion E25 and the inwardly curved rear portion E26 forms the inwardly curved structure weakening point P3.

Wherein, the transverse member E1 is preferably a round tube, but a tube member with other cross-sectional shapes such as a square tube can also be used.

The working principle of the above method 1 is as follows:

Referring to FIGS. 5 and 6 , when the rear seat frame of the automobile is in the stowed state and the automobile has a rear collision, the effect of the rear collision energy on the rear seat of the automobile can be a rigid fixture located behind the seat. Block G moves forward and squeezes the seat to simulate:

Since the force-conducting protrusion E3 is at least partially located at the rearmost position of the collapsed energy-absorbing frame E, and is located at the non-end position of the transverse member E1, the rigid fixture block G pressed forward first acts on the force-conducting protrusion On the block E3, the extrusion force of the rigid fixture block G pushes the transverse member E1 to the forward bending deformation through the force transmission bump E3. The dotted line E1' in the figure represents the transverse member E1 after the forward bending deformation. ; Thereby, the transverse member E1 after the forward bending deformation exerts a diagonal pulling force F1 on the outwardly curved front portions E21 of the two longitudinal members E2, and the diagonal pulling force F1 must contain the force component in the left and right directions, so that: the longitudinal member E2 is in the Under the action of the oblique pulling force F1, bending deformation occurs at both the weakening point P1 of the gap structure and the weakening point P2 of the outward bending structure, so as to absorb the rear collision energy; wherein, the specific method of the aforementioned bending deformation is: The said gap structure weakening point P1 protrudes outward, and the position between the longitudinal member E2 and the rear reinforcing plate E5 located between the gap structure weakening point P1 and the outward bending structure weakening point P2 is rotated and bent outward around the outward bending structure weakening point P2; When the rigid fixture block G continues to move forward to contact the head ends of the two longitudinal pieces E2, the rigid fixture block G exerts a forward thrust F2 on the head ends of the two longitudinal pieces E2, so that the corresponding longitudinal pieces E2 Under the action of the thrust F2, the aforementioned bending deformation continues to occur at the weakening point P1 of the gap structure and the weakening point P2 of the outward bending structure, so as to continue to absorb the rear collision energy, until the rigid fixture block G stops moving, that is, it acts on the rear of the car. Rear crash energy on the row seats is completely absorbed.

Therefore, it is realized that the rear seat frame of the automobile absorbs the collision energy by deforming in the stored state, which has the advantage of high energy absorption efficiency. Moreover, the cooperation of the two structural weakening points can absorb more collision energy and improve the collapse absorption rate. upper limit of energy.

The working principle of the second method is as follows:

Referring to FIGS. 5 and 6 , when the rear seat frame of the automobile is in the stowed state and the automobile has a rear collision, the effect of the rear collision energy on the rear seat of the automobile can be a rigid fixture located behind the seat. Block G moves forward and squeezes the seat to simulate:

Since the force-conducting protrusion E3 is at least partially located at the rearmost position of the collapsed energy-absorbing frame E, and is located at the non-end position of the transverse member E1, the rigid fixture block G pressed forward first acts on the force-conducting protrusion On the block E3, the extrusion force of the rigid fixture block G pushes the transverse member E1 to the forward bending deformation through the force transmission bump E3, and the dashed line E1" in the figure represents the transverse member E1 after the forward bending deformation; Therefore, the transverse member E1 after the forward bending deformation exerts an oblique pulling force F1 on the inwardly bent front parts E24 of the two longitudinal members E2, and the oblique pulling force F1 must contain a force component in the left and right directions, so that: the longitudinal member E2 is in the oblique direction. Under the action of the tensile force F1, bending deformation occurs at the weakening point P3 of the inward bending structure to absorb the rear collision energy; wherein, the specific way of the aforementioned bending deformation is: the inward bending front part E24 and the inward bending middle part of the longitudinal member E2 E25 is rotated and bent inwards around the weakening point P3 of the inward bending structure; and when the rigid fixture block G continues to move forward to contact the head ends of the two longitudinal members E2, the rigid fixture block G is opposite to the head ends of the two longitudinal members E2. A forward thrust F2 is applied to the end, so that the corresponding longitudinal member E2 continues to undergo the aforementioned bending deformation at the weakening point P3 of the inward bending structure under the action of the thrust F2, so as to continue to absorb the rear collision energy until the rigid fixture block G stops The movement, ie the rear crash energy acting on the rear seats of the vehicle, is completely absorbed.

Therefore, it is realized that the rear seat frame of the automobile absorbs the collision energy through deformation in the storage state, and has the advantage of high energy absorption efficiency.

The above is the basic implementation of the second embodiment, and further optimization, improvement and limitation can be made on the basis of this basic implementation:

Preferably: for the first method, the angle between the outwardly curved middle portion E22 and the outwardly curved rear portion E23 is between 135° and 170°; for the second method, the inwardly curved middle portion E25 and the inwardly curved portion E25 are included. The angle between the rear E26 is between 135° and 170°. Therefore, the efficiency of the pressing force transmission can be improved, so as to improve the energy absorption efficiency of the collision energy.

Preferably: for the first method, the position where the gap structure weakening point P1 is located is the position where the cross section of the longitudinal member E2 is the smallest. Therefore, the longitudinal member E2 is induced to bend at the weakening point P1 of the gap structure by means of a variable cross-section, thereby improving the reliability of energy absorption.

Preferably: for the first method, the longitudinal member E2 and the rear reinforcing plate E5 are provided with a weakening hole E2a at the weakening point P2 of the outwardly curved structure. Therefore, the longitudinal member E2 is induced to bend at the weakening point P2 of the outwardly curved structure through the weakened hole E2a, thereby improving the reliability of energy absorption.

Preferably: the flange of the longitudinal piece E2 at its head end is welded with the transverse piece E1.

In addition, by using thicker, larger size, and higher mechanical properties to prepare the shaft C, the support D, the transverse member E1, or by increasing the flange height of the longitudinal member E2 at its head end Welding the flange and the transverse member E1 can also improve the efficiency of extrusion force transmission, so as to improve the energy absorption efficiency of collision energy.

Preferably: for the first method, the gap between the front reinforcing plate E4 and the rear reinforcing plate E5 may be located at the junction of the outwardly curved front portion E21 and the outwardly curved middle portion E22, but is preferably located at the outwardly curved front portion E21 to ensure that the weakening point P1 of the gap structure is not easily deformed during normal use of the car seat.

Embodiment 3

On the basis of the second embodiment above, the third embodiment also adopts the following preferred implementations:

The vehicle rear seat frame adopts the following structural forms:

The backrest frame A is provided with a backrest upper tube A1, two backrest side plates A2, two of the angle adjusters A3, two backrest connecting plates A4 and a backrest lower tube A5; the seat cushion frame B is provided with a seat cushion front tube B1, two seat cushion side panels B2 and seat cushion rear tube B3; the seat cushion rear tube B3 can be rotatably installed on the support D as the rotating shaft C, and the two ends of the seat cushion front tube B1 are respectively connected with the two One end of the seat cushion side plate B2 is welded and fixed, and the other ends of the two seat cushion side plates B2 are respectively welded and fixed with the seat cushion rear pipe B3; the two backrest connecting plates A4 are respectively bolted with the two seat cushion side plates B2 One end of the two backrest side plates A2 are respectively installed on the two backrest connecting plates A4 through the two angle adjusters A3, and the other ends of the two backrest side plates A2 are connected to the backrest Both ends of the tube A1 are welded and fixed, and the two ends of the lower backrest tube A5 are welded to the inwardly curved rear portions E26 of the two backrest side panels A2 respectively;

In addition, the backrest frame A and the seat cushion frame B are both used as the crushing energy-absorbing frame E, wherein the backrest upper tube A1 of the backrest frame A and the seat cushion front tube B1 of the seat cushion frame B are both used as the lateral direction Item E1, the two backrest side panels A2 of the backrest frame A and the two seat cushion side panels B2 of the seat cushion frame B are both used as the longitudinal members E2; the backrest side panels A2 of the backrest frame A adopt the method described above. The second is to form the weakened point P3 of the inwardly curved structure; the seat cushion side plate B2 of the seat cushion frame B adopts the method 1 to form the weakened point P1 of the gap structure and the weakened point of the outwardly curved structure P2.

Therefore, the present invention can not only realize that the rear seat frame of the automobile can absorb the collision energy through deformation in the storage state, but also can realize the actual working conditions of the automobile seat back and seat cushion during normal use, through the front reinforcement plate E4 and The rear reinforcing plate E5 improves the strength of the seat cushion frame B in the front and rear parts, and at the same time meets the strength requirements of the car seat during normal use, and at the same time controls the weight and cost of the car seat to the maximum extent. Therefore, the present invention has a good energy absorption effect and is reliable. Moreover, compared with the car rear seats that do not solve the hidden danger of rear collision, the increase in weight and cost is small. and significantly reduced costs.

The above is the basic implementation of the third embodiment, which can be further optimized, improved and limited on the basis of this basic implementation:

Preferably: the backrest frame A is provided with two force-conducting protrusions E3, and the two force-conducting protrusions E3 are symmetrically arranged with the centerline of the backrest frame A as the symmetry line; the seat cushion frame B is provided with One of the force-conducting bumps E3, the force-conducting bumps E3 being centrally arranged on the seat cushion head tube B1. Wherein, the two force conduction bumps E3 on the back frame A can be used as headrest mounting brackets, and the force conduction bumps E3 on the seat cushion frame B Apply force.

In addition, the number of force-conducting protrusions E3 provided on the back frame A and the seat cushion frame B can be set as required.

The present invention is not limited to the above-mentioned specific embodiments. According to the above-mentioned content, according to the common technical knowledge and conventional means in the field, and without departing from the above-mentioned basic technical idea of the present invention, the present invention can also make other equivalents in various forms. Modifications, substitutions or changes all fall within the protection scope of the present invention.

For example, the ways in which the longitudinal member E2 of the collapsible energy-absorbing frame E forms the structural weakening point is not limited to the above-mentioned methods 1 and 2, as long as the longitudinal member E2 can reach its structural weakening point under the action of the diagonal pulling force F1 The bending deformation in the left and right directions is sufficient. For example, the longitudinal member E2 can also be a round tube or a square tube, and a structural weakening point is formed by partially pressing a concave shape or flattening the tube body, but this method is not easy to longitudinally Piece E2 is designed to meet other experimental requirements.

Claims (10)

1. An automobile rear seat frame capable of collapsing and absorbing energy, comprising a backrest frame (A) and a seat cushion frame (B) that are both fixedly connected to a rotating shaft (C), and the backrest frame (A) is provided with an adjustable Angle device (A3), the rotating shaft (C) can be rotatably installed on the support (D) fixed with the vehicle body; the way that the vehicle rear seat frame is converted from the use state to the storage state is: the backrest The frame (A) is turned forward through the angle adjuster (A3), and the back frame (A) and the seat cushion frame (B) are turned backward together through the rotating shaft (C); It is characterized by: At least one of the back frame (A) and the seat cushion frame (B) is a crushing energy-absorbing frame (E) provided with a crushing energy-absorbing structure, so that: when the automobile rear seat frame is in the In the stored state and when the vehicle is in a rear collision, the collapsible energy absorbing structure deforms the collapsible energy absorbing framework (E) under the action of the collision energy, so as to absorb the collision energy. 2. The automobile rear seat frame capable of collapsing and absorbing energy according to claim 1, characterized in that: the collapsible energy-absorbing structure of the collapsible energy-absorbing frame (E) is: The crushing energy-absorbing frame (E) has a transverse piece (E1) and two longitudinal pieces (E2), and the head ends of the two longitudinal pieces (E2) are respectively connected to both ends of the transverse piece (E1). , the tail end can transmit the force to the rotating shaft (C); In addition, as far as the vehicle rear seat frame is in the storage state: the transverse member (E1) is fixed with a rearwardly protruding force transmission bump (E3) at its non-end position, and the force Conductive bumps (E3) are at least partially located at the rearmost positions of the crumpling energy-absorbing framework (E); at least one of the two longitudinal pieces (E2) is formed with a structural weakening point. 3. The vehicle rear seat frame capable of collapsing and absorbing energy according to claim 2, characterized in that: as far as the vehicle rear seat frame is in the storage state, the crushing energy absorbing frame ( The longitudinal member (E2) of E) forms the structural weakening point in one of two ways: Mode 1, the transverse member (E1) is a pipe member extending in the left-right direction, the longitudinal member (E2) is a plate member with flanged edges on both sides, and the longitudinal member (E2) is formed by the outer bending front connected in turn. The outer bending part (E21), the outer bending middle part (E22) and the outer bending rear part (E23) are composed, the outer bending front part (E21) is welded and fixed with the transverse member (E1), and the outer bending rear part (E23) The force can be transmitted to the rotating shaft (C), the outwardly curved front portion (E21) and the outwardly curved rear portion (E23) both extend in the front-rear direction, the outwardly curved middle portion (E22) is arranged obliquely, and the two The distance between the outwardly curved front portions (E21) of the two longitudinal pieces (E2) is greater than the distance between the outwardly curved rear portions (E23) of the two longitudinal pieces (E2); such that: the outwardly curved middle portion (E22) and the The junction of the rear part of the outer curve (E23) forms a weakening point (P2) of the outer curve structure; In addition, the longitudinal member (E2) is welded with a front reinforcing plate (E4) and a rear reinforcing plate (E5) on the flanges on both sides thereof, and the front reinforcing plate (E4) and the rear reinforcing plate (E5) are respectively connected with the The longitudinal piece (E2) encloses a lumen, and there is a gap located at the outer curved front portion (E21) between the front reinforcing plate (E4) and the rear reinforcing plate (E5), so that: at the gap Formation of gap structure weakening point (P1); Mode 2, the transverse piece (E1) is a pipe piece extending in the left-right direction, the longitudinal piece (E2) is a plate piece with flanged edges on both sides, and the longitudinal piece (E2) is formed by the inward bending fronts connected in turn. The inner bending part (E24), the inner bending middle part (E25) and the inner bending rear part (E26) are composed. The inner bending front part (E24) is welded and fixed with the transverse member (E1); The force can be transmitted to the rotating shaft (C), the inwardly curved front portion (E24) and the inwardly curved rear portion (E26) both extend in the front-rear direction, the inwardly curved middle portion (E25) is arranged obliquely, and the two The distance between the inwardly curved front portions (E24) of the two longitudinal pieces (E2) is smaller than the distance between the inwardly curved rear portions (E26) of the two longitudinal pieces (E2); such that: said inwardly curved middle portion (E25) and The junction of the rear part of the inner curve (E26) forms the weakening point (P3) of the inner curve structure. 4. The car rear seat frame capable of collapsing and absorbing energy according to claim 3, characterized in that: for the first mode, the gap between the outer curved middle portion (E22) and the outer curved rear portion (E23) is The included angle is between 135° and 170°; for the second method, the included angle between the inwardly bent middle portion (E25) and the inwardly bent rear portion (E26) is between 135° and 170°. The vehicle rear seat frame capable of collapsing and absorbing energy according to claim 3, characterized in that: for the first method, the position where the gap structure weakening point (P1) is located is the longitudinal member (E2) the smallest part of the cross-section. 6. The vehicle rear seat frame capable of collapsing and absorbing energy according to claim 3, characterized in that: for the first method, the longitudinal member (E2) and the rear reinforcing plate (E5) are bent outwards in the A weakened hole (E2a) is provided at the structural weakening point (P2). 7. The car rear seat frame capable of collapsing and absorbing energy according to claim 3, characterized in that: the flange of the longitudinal piece (E2) at its head end is welded with the transverse piece (E1). The vehicle rear seat frame capable of collapsing and absorbing energy according to claim 3, characterized in that: for the first method, the gap between the front reinforcing plate (E4) and the rear reinforcing plate (E5) It is located in the middle position of the outer curved front part (E21). 9. The vehicle rear seat frame capable of collapsing and absorbing energy according to any one of claims 3 to 8, wherein the vehicle rear seat frame adopts the following structural forms: The backrest frame (A) is provided with a backrest upper tube (A1), two backrest side plates (A2), two of the angle adjusters (A3), two backrest connecting plates (A4) and a backrest lower tube (A5) ); the seat cushion frame (B) is provided with a seat cushion front tube (B1), two seat cushion side plates (B2) and a seat cushion rear tube (B3); the seat cushion rear tube (B3) can be used as the rotating shaft (C) Rotate and install on the support (D), the two ends of the seat cushion front pipe (B1) are respectively welded and fixed with one end of the two seat cushion side plates (B2), and the two seat cushion side plates (B2) are welded and fixed respectively. The other end is welded and fixed to the seat cushion rear pipe (B3) respectively; the two backrest connecting plates (A4) are respectively bolted to the two seat cushion side panels (B2), and the two backrest side panels (A2) One end of the two backrest connecting plates (A4) are respectively installed on the two backrest connecting plates (A4) through the two angle adjusters (A3), and the other ends of the two backrest side plates (A2) are connected to the backrest upper tube (A1) The two ends of the backrest are welded and fixed, and the two ends of the backrest lower tube (A5) are respectively welded to the inwardly curved rear parts (E26) of the two backrest side plates (A2); In addition, the backrest frame (A) and the seat cushion frame (B) are both used as the crushing energy-absorbing frame (E), wherein the backrest upper tube (A1) of the backrest frame (A) and the seat cushion frame ( The seat cushion front pipe (B1) of B) is used as the cross member (E1), the two backrest side panels (A2) of the backrest frame (A) and the two seat cushion side panels (A2) of the seat cushion frame (B) B2) are all used as the longitudinal member (E2); the backrest side plate (A2) of the backrest frame (A) adopts the second method to form the weakening point (P3) of the inwardly curved structure; the seat cushion frame (B) The seat cushion side plate (B2) adopts the method described above to form the gap structure weakening point (P1) and the outward bending structure weakening point (P2). 10. The car rear seat frame capable of collapsing and absorbing energy according to claim 9, characterized in that: the backrest frame (A) is provided with two of the force conducting bumps (E3), and the two The force conduction bumps (E3) are symmetrically arranged with the center line of the backrest frame (A) as the symmetry line; the seat cushion frame (B) is provided with one of the force conduction bumps (E3), the force conduction bump (E3) ) is centrally arranged on the seat cushion front pipe (B1).

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