Collapsible hinge components and automobiles

Abstract

This invention relates to a collapsible hinge assembly and an automobile. The collapsible hinge assembly includes a hinge arm and a fixed plate. The fixed plate has a first end and a second end located on opposite sides. The first end is pivotally connected to the hinge arm, and the second end is used to connect to the automobile body. The fixed plate has a first bend and a second bend spaced apart along a direction from the first end to the second end. The bending direction of the first bend is opposite to that of the second bend, and the stiffness of the second bend is greater than that of the first bend. A collapsible portion is provided between the first bend and the second bend, and the stiffness of the first bend is greater than that of the collapsible portion. This invention adds a collapsible energy-absorbing part through the collapsible portion. The collapsible portion can undergo the first energy-absorbing deformation before the first bend, and can undergo a second energy-absorbing deformation during the deformation process of the first and second bends, thereby further improving the collapsible energy-absorbing effect of the hinge assembly and improving the passive safety performance of the automobile.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a collapsible hinge assembly and an automobile. Background Technology

[0002] With the rapid development of automotive technology, automobiles have become an indispensable means of transportation in people's daily lives, and at the same time, vehicle safety has received increasing attention. Vehicle safety is divided into occupant protection and pedestrian protection. Occupant protection focuses on protecting the driver and passengers inside the vehicle, while pedestrian protection protects people outside the vehicle. Pedestrian protection is further divided into active and passive pedestrian protection. Passive pedestrian protection generally involves designing the vehicle's front hood system, front bumper system, and other components with low injury values. To effectively protect pedestrians, the most common and effective method is to increase the collision buffer space of the vehicle's front hood (engine hood) to absorb the energy generated during a collision, thereby reducing pedestrian injury.

[0003] In existing technologies, the front hood of a car is connected to the car body via a hinge assembly. This hinge assembly includes a hinge arm and a fixed flap. The fixed flaps are typically simple vertical structures, or have various shapes of reinforcing ribs added to the vertical structure, making the hinge very strong. This provides sufficient strength to support the forces required when the hood is open. However, the hinge is generally located within the impact zone where a pedestrian's head is struck from above. Therefore, even high-strength hinges are not easily crushed or deformed under impact, failing to efficiently absorb collision energy. To address this, related technologies have fixed flaps with bends in the vertical direction to reduce their structural strength. This allows the fixed flap to quickly collapse and absorb energy upon collision with a pedestrian. However, the hinge assembly in these technologies only reduces the structural strength of the fixed flap through bends, limiting its collapse energy absorption performance. Summary of the Invention

[0004] One objective of this invention is to provide a collapsible hinge assembly to further improve the collapsible energy absorption performance of the hinge assembly; another objective is to provide an automobile.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A collapsible hinge assembly for use in an automobile includes a hinge arm and a fixed plate. The hinge arm is disposed on one side of the fixed plate. The fixed plate has a first end and a second end located on opposite sides. The first end is pivotally connected to the hinge arm, and the second end is used to connect to the automobile body. The fixed plate has a first bend and a second bend spaced apart along a first direction. The bending direction of the first bend is opposite to that of the second bend, and the stiffness of the second bend is greater than that of the first bend. A collapsible portion is provided between the first bend and the second bend, and the stiffness of the first bend is greater than that of the collapsible portion. The first direction is from the first end to the second end.

[0007] According to the aforementioned technical means, because the stiffness of the second bend is greater than that of the first bend, and the stiffness of the first bend is greater than that of the crumple zone, the fixing plate can deform sequentially, thereby guiding the crumple zone and preventing it from colliding with other parts of the vehicle during the sag of the front hood. The crumple zone can undergo its first energy-absorbing deformation before the first bend. During the energy-absorbing deformation of the first and second bends, because the stiffness of the crumple zone is less than that of the first and second bends, it can undergo a second energy-absorbing deformation. Therefore, the first bend, the second bend, and the crumple zone further enhance the crumple zone's energy-absorbing performance, which helps reduce pedestrian injuries during a collision.

[0008] Furthermore, the collapsible portion protrudes to one side of the thickness direction of the fixing plate, and a groove is formed on the other side of the thickness direction of the fixing plate.

[0009] According to the above-mentioned technical means, by forming a quasi-bending deformation position between the first bending part and the second bending part through the collapse part, the collapse part can undergo bending deformation and stretching deformation successively, thereby further improving the collapse energy absorption effect of the hinge assembly.

[0010] Furthermore, the groove is located on the side of the fixing plate away from the hinge arm.

[0011] Based on the above technical means, it is beneficial for the fixed plate to bend and deform around the collapsible part towards the hinge arm side.

[0012] Furthermore, a collapsing section is formed between the first bend and the second bend, and in the first direction, the length of the collapsing section is at least half the length of the fixed plate.

[0013] Based on the above technical means, by limiting the length of the collapsible section, the fixed plate has a larger sinking space in the vertical direction, thereby improving the energy absorption performance of the fixed plate, which in turn helps to improve the collapsible energy absorption performance of the hinge assembly.

[0014] Furthermore, the width of the plate surface at the first bend is smaller than the width of the plate surface at the second bend.

[0015] The above-mentioned technical means ensure that the stiffness of the first bending part is less than that of the second bending part, thereby guaranteeing that the first bending part deforms before the second bending part.

[0016] Furthermore, the fixing plate extends from the first bend to the second bend along the first direction and is provided with weight-reducing holes.

[0017] The aforementioned technical methods help reduce the weight of the hinge assembly.

[0018] Furthermore, the surface of the first end plate is parallel to the surface of the second end plate.

[0019] The aforementioned technical means enable the mounting plate to be installed vertically on the vehicle body, reducing the space occupied by the mounting plate in the lateral direction, thereby providing a larger collapsible space for the hinge assembly in the lateral direction.

[0020] Furthermore, the first bend and the second bend are provided with reinforcing ribs.

[0021] By employing the aforementioned technical methods, the strength of the fixed structure can be avoided from being excessively reduced after setting the weight-reducing holes, which helps to ensure the structural strength of the plate body of the first and second bending sections.

[0022] Furthermore, the end of the articulated arm that is hinged to the first end has a limiting protrusion, and the first end has a limiting portion. The limiting protrusion and the limiting portion cooperate to limit the rotation angle of the articulated arm.

[0023] The aforementioned technical means are beneficial for limiting the rotation angle of the articulated arm.

[0024] An automobile includes a front hood and a body, the front hood and the body being connected by the aforementioned hinge assembly.

[0025] Based on the aforementioned technical means, the hinge assembly can effectively cope with pedestrian collisions, enhance the crumple zone energy absorption performance of the vehicle, and thus improve the vehicle's passive safety performance.

[0026] The beneficial effects of this invention are:

[0027] (1) By adding a collapsible portion between the first bend and the second bend, the present invention increases the collapsible energy absorption portion of the fixing plate, which is beneficial to improving the collapsible energy absorption effect of the hinge assembly.

[0028] (2) The collapsible portion in this invention can undergo the first energy absorption deformation before the first bending portion, and since the stiffness of the collapsible portion is less than that of the first bending portion and the second bending portion, the collapsible portion can undergo the second energy absorption deformation, thereby further improving the collapsible energy absorption effect of the hinge assembly, which is beneficial to improving the passive safety performance of automobiles and reducing pedestrian collision injuries.

[0029] (3) The present invention limits the stiffness of the first bending part, the collapse part and the second bending part, thereby guiding the fixing plate to deform along the preset deformation direction, avoiding collision with other parts of the car during the process of the hinge assembly driving the car front cover to sink, thereby improving the collapse stability of the hinge assembly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the collapsible hinge assembly according to an embodiment of the present invention;

[0031] Figure 2 This is an exploded view of a collapsible hinge assembly according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the rotating state of the articulated arm according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the fixing plate according to an embodiment of the present invention;

[0034] Figure 5 This is a side view of the fixing plate according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the articulated arm according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of a collapsible hinge assembly installed in a car according to an embodiment of the present invention.

[0037] Among them, 100-fixing plate, 12-rivet joint, 13-bushing, 101-first bend, 102-second bend, 103-collapse portion, 104-reinforcing rib, 105-weight reduction hole, 106-first fixing hole, 107-first pivot hole, 110-first end, 111-limiting portion, 120-second end, 200-hinged arm, 210-limiting protrusion, 201-second pivot hole, 202-second fixing hole, 203-strip reinforcing rib, 204-strut mounting ball head, 300-car front cover, 400-car body. Detailed Implementation

[0038] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0039] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Please see Figures 1 to 3 This embodiment proposes a collapsible hinge assembly for use in automobiles. The hinge assembly includes a hinge arm 200 and a fixed plate 100. The hinge arm 200 is disposed on one side of the fixed plate 100. The fixed plate 100 has a first end 110 and a second end 120 located on opposite sides. The first end 110 is pivotally connected to the hinge arm 200, and the second end 120 is connected to the automobile body 400.

[0041] Please see Figure 7 The hinge assembly can be disposed between the front cover 300 and the vehicle body 400. One end of the hinge arm 200 is fixedly connected to the front cover 300, and the other end is pivotally connected to the fixing plate 100. The hinge arm 200 can pivot relative to the first end 110 of the fixing plate 100 to drive the front cover 300 to rotate. The fixing plate 100 is fixedly installed on the vehicle body 400 to support and fix the hinge assembly and the front cover 300. In this embodiment, the fixing plate 100 is vertically arranged, with the upper end of the fixing plate 100 serving as the first end 110 and pivotally connected to the hinge arm 200, and the lower end of the fixing plate 100 serving as the second end 120 and connected to the vehicle body 400.

[0042] The fixing plate 100 is provided with a first bent portion 101 and a second bent portion 102 spaced apart along a first direction. The bending direction of the first bent portion 101 is opposite to that of the second bent portion 102, and the stiffness of the second bent portion 102 is greater than that of the first bent portion 101. A collapsible portion 103 is provided between the first bent portion 101 and the second bent portion 102, and the stiffness of the first bent portion 101 is greater than that of the collapsible portion 103. The first direction is the direction from the first end 110 to the second end 120, i.e. Figure 1 and Figure 2 The X direction is shown in the diagram.

[0043] Since the fixing plate 100 has a first bent portion 101 and a second bent portion 102 with opposite bending directions, it can be understood that in the horizontal direction, the first bent portion 101 and the second bent portion 102 are staggered, and the first end 110 and the second end 120 of the fixing plate 100 are staggered. A collapsible space is formed below the first end 110 to allow the first end 110 to sink. In this way, the structural strength of the fixing plate 100 in the vertical direction is reduced, and the first end 110 of the fixing plate 100 can drive the hinged arm 200 hinged to it to sink vertically downward, thereby driving the car front cover 300 downward to buffer, so as to deal with the situation of pedestrian collision with the car front cover 300 in a timely manner, which helps to reduce the collision injury caused by the car to the pedestrian. Among them, in the vertical direction, the first bent portion 101, the collapsible portion 103 and the second bent portion 102 are arranged from top to bottom, with the second bent portion 102 having the strongest stiffness, followed by the first bent portion 101, and the collapsible portion 103 having the weakest stiffness. When the front hood 300 of the car is struck by a pedestrian, the impact force is transmitted through the front hood 300 to the first end 110 of the fixed plate 100. The fixed plate 100 deforms under the impact force, first at the crumple zone 103, then at the first bend 101, and finally at the second bend 102. The crumple zone 103 can undergo the first energy-absorbing deformation before the first bend 101. And because the stiffness of the crumple zone 103 is less than that of the first bend 101 and the second bend 102, the crumple zone 103 can undergo a second energy-absorbing deformation during the deformation of the first bend 101 and the second bend 102, thereby further improving the crumple energy absorption effect of the hinge assembly. Therefore, the fixing plate 100 in this embodiment can deform at the first bending portion 101, the collapsing portion 103 and the second bending portion 102, which is beneficial for the fixing plate 100 to absorb the collision impact energy transmitted by the car front cover 300.

[0044] For ease of understanding, the plate portion between the first bend 101 and the second bend 102 is defined as the crumple zone, and the crumple zone 103 is located within the crumple zone. During the energy absorption process of the fixed plate 100 during crumple, the presence of the crumple zone enhances the energy absorption performance of the fixed plate 100. Specifically, on one hand, during the crumple process of the fixed plate 100, the crumple zone itself can adapt to the sinking of the first end 110 of the fixed plate 100. The crumple zone deforms downward as the first end 110 sinks, meaning that in the vertical direction, the crumple zone provides a larger sinking buffer space for the car hood 300, thereby improving the energy absorption effect of the fixed plate 100 on impact. On the other hand, since the crumple zone is located between the first bend 101 and the second bend 102, during the downward deformation process, the crumple zone undergoes a certain tensile deformation between the first bend 101 and the second bend 102, which is beneficial for the crumple zone to absorb impact energy, thereby improving the energy absorption effect of the fixed plate 100 during crumple. Therefore, compared with related technologies, the embodiments of this application further improve the collapsible energy absorption performance of the hinge assembly by means of the collapsible portion of the collapsible segment, thereby improving the passive safety performance of the vehicle.

[0045] In addition, in this embodiment, the bending directions of the first bending portion 101 and the second bending portion 102 are opposite, and they are spaced apart. When the first bending portion 101 deforms before the second bending portion 102, during the collapse and energy absorption process, the plate above the first bending portion 101 is close to the plate below the second bending portion 102. This causes the fixing plate 100 to deform in a manner similar to a "fold," which helps guide the deformation direction of the fixing plate 100 and prevents the car hood 300 from causing additional damage to other car components.

[0046] Optionally, the first bend 101 and the second bend 102 are arranged parallel to each other, and the first bend 101 and the second bend 102 cover the entire width direction of the plate. The stiffness of the collapse portion 103 is less than that of the first bend 101 and the second bend 102, so the structural strength of the collapse portion 103 is also relatively low. This can be achieved by limiting the material at different locations so that the stiffness of the collapse portion 103 is less than that of the first bend 101 and the second bend 102.

[0047] Please see Figure 2The first end 110 of the fixing plate 100 has a first pivot hole 107, and the first end of the hinge arm 200 has a second pivot hole 201. The first end 110 and the hinge arm 200 are pivotally connected via a pivot shaft or a rivet joint 12. For example, the rivet joint 12 passes through the first pivot hole 107 and the second pivot hole 201, and a bushing 13 is added to reinforce the pivoting part. The second end 120 has a first fixing hole 106, through which the second end 120 is bolted to the vehicle body 400. The articulated arm 200 has a second fixing hole 202 on the side away from the first end 110 of the fixed plate 100. The articulated arm 200 is bolted to the car front cover 300 through the second fixing hole 202. In addition, a strut mounting ball head 204 is installed on the end of the articulated arm 200 away from the first end 110. The strut mounting ball head 204 is used to connect a strut. The strut pushes the strut mounting ball head 204, thereby pushing the car front cover 300 to open and close. The articulated arm 200 also has strip reinforcing ribs 203 on its outer periphery along its extension direction to improve structural strength.

[0048] Furthermore, in the first direction, the length of the collapsible section is at least half the length of the fixed plate 100. By limiting the length of the collapsible section, the fixed plate 100 has a larger downward space in the vertical direction, thereby improving the energy absorption performance of the fixed plate 100, which in turn helps to improve the collapsible energy absorption performance of the hinge assembly.

[0049] In the embodiments of this application, please refer to Figure 2 and Figure 5 The collapsible portion 103 protrudes to one side of the fixing plate 100 in the thickness direction, and a groove is formed on the other side of the fixing plate 100 in the thickness direction. That is, the fixing plate 100 forms a bent portion in the collapsible portion 103. The collapsible portion 103 forms a quasi-bending deformation position between the first bending portion 101 and the second bending portion 102, so that the stiffness of the collapsible portion 103 is less than the stiffness of the first bending portion 101 and the second bending portion 102. This is beneficial for the fixing plate 100 to collapse and absorb impact energy. Furthermore, the grooved structure of the collapsible portion 103 helps to guide the fixing plate 100 to bend and deform in a predetermined direction.

[0050] Specifically, when the collapsible portion 103 deforms before the first bending portion 101, the collapsible portion 103 absorbs the impact energy, undergoing bending and stretching deformations, which helps improve the collapsible energy absorption effect of the hinge assembly. When the collapsible section between the first bending portion 101 and the second bending portion 102 is under tension, the collapsible portion 103 gradually tends to straighten under the action of tensile force, allowing the collapsible portion 103 to continue absorbing impact energy, further improving the collapsible energy absorption effect of the hinge assembly. Furthermore, after being stretched, the length of the collapsible section increases, thereby increasing the depth to which the first end 110 drives the hinge arm 200 to sink, which in turn helps enhance the collapsible energy absorption effect of the hinge assembly.

[0051] Optionally, the midpoint between the first bend 101 and the second bend 102 of the collapse portion 103 has a circular arc cross-sectional shape in the side view direction, which is formed by a stamping process. The groove formed by the collapse portion 103 is parallel to the first bend 101 and the second bend 102.

[0052] Preferably, the groove is located on the side of the fixed plate 100 away from the hinge arm 200. The collapsible portion 103 protrudes towards the hinge arm 200, and a groove is formed on the side away from the hinge arm 200. In this way, during the initial deformation, the groove opening gradually increases, and the opposite groove edges on both sides of the groove move away from each other. The collapsible section undergoes bending deformation at the collapsible portion 103. The collapsible portion 103 plays a guiding role during the deformation of the fixed plate 100, which helps to ensure the deformation direction of the fixed plate 100 and reduce the impact of external impacts on other components inside the vehicle. Compared to placing the groove on the side of the fixed plate 100 closer to the hinge arm 200, this avoids the opposite groove edges on both sides of the groove preventing deformation during the bending deformation of the fixed plate towards the hinge arm 200, which is beneficial for the fixed plate 100 to bend and deform around the collapsible portion towards the hinge arm. While the collapsible section between the first bend 101 and the second bend 102 is under tension, the arc-shaped collapsible section 103 gradually straightens under the tensile force. In other words, the arc-shaped collapsible section 103 can further absorb impact energy, which is beneficial to improving the collapsible energy absorption effect of the hinge assembly. At the same time, after the collapsible section 103 is stretched flat, the length of the collapsible section increases, thereby increasing the buffer sinking depth of the first end 110 of the fixed plate 100.

[0053] Optionally, the collapsible section is provided with multiple collapsible portions 103, which have a groove structure and are arranged in parallel with each other. In this way, when the collapsible section is under tension, the multiple collapsible portions 103 absorb the impact energy and are gradually stretched and straightened, which is beneficial to increasing the collapsible energy absorption performance of the hinge assembly.

[0054] In the embodiments of this application, please refer to Figure 3 and Figure 4The width of the first bend 101 is smaller than the width of the second bend 102. By limiting the widths of both the first bend 101 and the second bend 102, the stiffness of the first bend 101 is less than the stiffness of the second bend 102, ensuring that the first bend 101 deforms before the second bend 102. Figure 1 and Figure 2 The Y direction shown is the width direction, and the width of the plate is the length of the fixed plate 100 in the Y direction.

[0055] In the embodiments of this application, please refer to Figures 1 to 4 The fixing plate 100 extends from the first bend 101 to the second bend 102 along a first direction and is provided with weight-reducing holes 105. By providing weight-reducing holes 105, on the one hand, it is beneficial to reduce the weight of the hinge assembly, thereby reducing the overall weight of the vehicle; on the other hand, the weight-reducing holes 105 can limit the actual width of the fixing plate 100 at the crumple zone 103, thereby facilitating the design of the stiffness of the crumple zone 103, that is, the groove length of the crumple zone 103 can be designed to be smaller than that of the first bend 101 and the second bend 102, for example, by using rhomboid or elliptical weight-reducing holes 105.

[0056] For example, the weight reduction hole 105 is rectangular and extends from the first bend 101 to the second bend 102 along the length of the collapse section, so that the fixing plate 100 can deform in the collapse section to ensure the collapse energy absorption effect.

[0057] In the embodiments of this application, please refer to Figure 5 The surface of the first end 110 and the surface of the second end 120 are parallel to each other. Both the mounting surfaces of the first end 110 and the second end 120 are located in the vertical direction, allowing the fixing plate 100 to be vertically mounted on the vehicle body 400. In related technologies, the second end 120 of the fixing plate 100 is horizontally positioned. Compared to existing technologies, this application effectively reduces the horizontal space occupied by the fixing plate 100, thereby providing a larger collapsible space for the hinge assembly in the horizontal direction, and also helps to reduce scratch damage to the horizontal side of the hinge assembly.

[0058] In the embodiments of this application, please refer to Figures 4 to 5 The first bend 101 and the second bend 102 are provided with reinforcing ribs 104. The reinforcing ribs 104 structurally strengthen the first bend 101 and the second bend 102, preventing excessive reduction in the structural strength of the fixing plate 100 due to the weight-reducing holes 105. This helps ensure the structural strength of the plates in the first bend 101 and the second bend 102, thus fulfilling the most basic supporting function of the fixing plate 100. Preferably, the reinforcing ribs 104 are triangular reinforcing ribs, square ribs, etc.

[0059] In the embodiments of this application, please refer to Figure 4 and Figure 6 The hinge arm 200 has a limiting protrusion 210 at the end hinged to the first end 110, and the first end 110 has a limiting part 111. The limiting protrusion 210 and the limiting part 111 engage in a limiting cooperation to restrict the rotation angle of the hinge arm 200. Due to the limiting cooperation between the limiting protrusion 210 and the limiting part 111, the rotation angle of the hinge arm 200 is restricted.

[0060] Optionally, the outer periphery of the first end 110 is arc-shaped, and the arc-shaped area corresponds to the rotation range of the car front cover 300 during daily use. A limiting part 111 is provided on the rotation path of the limiting protrusion 210 corresponding to the first end 110 to limit the limiting protrusion 210. The end of the hinge arm 200 is bent to form the limiting protrusion 210 and rotates along the arc-shaped periphery of the first fixing member. In this way, the limiting protrusion 210 and the limiting part 111 cooperate to achieve a limiting engagement.

[0061] Please see Figure 7 This application also proposes a vehicle, including a front hood 300 and a vehicle body 400, wherein the front hood 300 is closably connected to the vehicle body 400 via the aforementioned hinge assembly. Therefore, the vehicle of this application embodiment possesses the beneficial effects of the collapsible hinge assembly of any of the aforementioned solutions, which will not be elaborated further here. As can be seen from the foregoing analysis, the vehicle of this application embodiment, through the hinge assembly, can effectively cope with pedestrian collisions, enhance the vehicle's collapsible energy absorption effect, and thereby improve the vehicle's passive safety performance.

[0062] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A collapsible hinge assembly for use in automobiles, characterized in that: The collapsible hinge assembly includes a hinge arm (200) and a fixed plate (100), wherein the hinge arm (200) is disposed on one side of the fixed plate (100), and wherein, The fixing plate (100) has a first end (110) and a second end (120) located on opposite sides, the first end (110) being pivotally connected to the hinge arm (200), and the second end (120) being used to connect to the vehicle body; The fixing plate (100) is provided with a first bending portion (101) and a second bending portion (102) spaced apart along a first direction. The bending direction of the first bending portion (101) is opposite to that of the second bending portion (102), and the stiffness of the second bending portion (102) is greater than that of the first bending portion (101). A collapsible portion (103) is provided between the first bending portion (101) and the second bending portion (102), and the stiffness of the first bending portion (101) is greater than that of the collapsible portion (103). The first direction is the direction from the first end (110) to the second end (120). The collapsible portion (103) protrudes to one side of the thickness direction of the fixing plate (100), and the collapsible portion (103) has a groove formed on the other side of the thickness direction of the fixing plate (100), the groove being located on the side of the fixing plate (100) away from the hinge arm (200). The fixing plate (100) deforms under the impact force, first at the collapse portion (103), then at the first bending portion (101), and finally at the second bending portion (102). The collapsible portion (103) can undergo the first energy-absorbing deformation before the first bending portion (101). Since the stiffness of the collapsible portion (103) is less than that of the first bending portion (101) and the second bending portion (102), the collapsible portion (103) can undergo the second energy-absorbing deformation during the deformation process of the first bending portion (101) and the second bending portion (102).

2. The collapsible hinge assembly according to claim 1, characterized in that: A collapsing section is formed between the first bend (101) and the second bend (102), and in the first direction, the length of the collapsing section is at least half the length of the fixed plate (100).

3. The collapsible hinge assembly according to claim 1, characterized in that: The width of the first bend (101) is smaller than the width of the second bend (102).

4. The collapsible hinge assembly according to claim 1, characterized in that: The fixing plate (100) extends from the first bending portion (101) to the second bending portion (102) along the first direction and is provided with weight reduction holes (105).

5. The collapsible hinge assembly according to claim 1, characterized in that: The surface of the first end (110) is parallel to the surface of the second end (120).

6. The collapsible hinge assembly according to claim 1, characterized in that: The first bend (101) and the second bend (102) are provided with reinforcing ribs (104).

7. The collapsible hinge assembly according to any one of claims 1 to 6, characterized in that: The hinge arm (200) has a limiting protrusion (210) at one end that is hinged to the first end (110), and the first end (110) has a limiting part (111). The limiting protrusion (210) and the limiting part (111) cooperate to limit the rotation angle of the hinge arm (200).

8. An automobile, comprising a front hood (300) and a body (400), characterized in that: The vehicle front hood (300) is connected to the vehicle body (400) via a collapsible hinge assembly as described in any one of claims 1 to 7.

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