Folding engine hood and vehicle

Abstract

The folding engine hood comprises a main body and a guide rail arranged at the bottom of the main body, the main body is segmented and hinged in the length direction of a vehicle body, the first end of the main body is hinged to the vehicle body, the second end of the main body is fixedly connected with a sliding ball, and the sliding ball is arranged on the guide rail. The guiding direction of the guiding track is in the length direction of the vehicle body, and a locking part is arranged in the non-end area of the guiding track. The sliding ball drives the first end of the main body to move towards the back of the vehicle body and lift the main body when bearing acting force towards the back of the vehicle body, and when the sliding ball is locked to the locking part, the main body vertically protrudes upwards. According to the engine hood, the main body of the engine hood is sectionally arranged, hinged and matched, so that the engine hood is lifted in the vertical direction when the front end of a truck body is impacted and can be in contact with a higher chassis at the tail of the truck to protect a passenger compartment; and meanwhile, the lifted main body is in rigid contact with the truck to generate obvious speed reduction so as to feed back that the air bag pops up and protect passengers.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, in particular to a foldable engine hood and a vehicle. Background Art

[0002] The safety protection of vehicle occupants during a collision is one of the important indicators of vehicle safety. The energy-absorbing structure on the front side of the vehicle and the airbags inside are all designed to protect the occupants. Among the various types of vehicle collisions, a small vehicle rear-ending a truck is a very serious collision scenario. The chance of survival of the occupants in the vehicle during the collision is extremely small. This is mainly because the chassis and box of the truck are relatively high above the ground. When a small vehicle rear-ends a truck, the front side will be embedded between the chassis and the ground of the truck, causing the tail of the truck to directly impact the A-pillar area of ​​the vehicle, and the box structure will directly invade the cockpit and passenger compartment, causing harm to the front-seat occupants of the small vehicle. At the same time, when a small vehicle rear-ends a truck and is embedded in the collision, there is no effective rigid barrier on the front side of the small vehicle, and the car's collision sensor cannot collect a large deceleration in a short time, and there is a risk that the airbags may not pop out in time, which will also reduce the chance of survival of the occupants in the vehicle.

[0003] Therefore, how to improve the safety of passengers in a collision scenario where a small vehicle rear-ends a truck is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The utility model provides a foldable engine hood and a vehicle, so as to improve the safety of passengers in a collision scenario where a small vehicle rear-ends a truck.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a foldable engine hood, comprising a main body and a guide track arranged at the bottom of the main body, the main body is divided into sections in the length direction of the vehicle body and each section is hinged, a first end of the main body is hinged to the vehicle body, and a sliding ball is fixedly connected to the second end, the sliding ball is slidably arranged on the guide track, the guiding direction of the guide track is along the length direction of the vehicle body, and a locking portion is arranged in the non-end area of ​​the guide track;

[0007] When the sliding ball is acted upon by a force toward the rear of the vehicle body, the sliding ball drives the first end of the main body to move toward the rear of the vehicle body and lift the main body. When the sliding ball is locked at the locking portion, the main body protrudes vertically upward.

[0008] Optionally, in the above-mentioned folding engine hood, the main body includes a first hood and a second hood arranged flat along the length direction of the vehicle body, the first hood is close to the front end of the vehicle body and is hinged to the second hood through a connecting shaft arranged through the width direction of the vehicle body.

[0009] Optionally, in the above-mentioned folding engine hood, the first hood and the second hood have the same length in the front-rear direction of the vehicle body, and the locking portion is arranged directly below the connecting shaft.

[0010] Optionally, in the above-mentioned folding engine hood, thrust triangles are respectively provided at the bottom of the hinged ends of the first hood and the second hood, and the thrust triangles are rigid plate structures. When the sliding ball is locked in the locking portion, one side edge of the two thrust triangles abuts against and limits the first hood and the second hood.

[0011] Optionally, in the above-mentioned folding engine hood, the locking portion is a groove structure recessed in the surface of the guide rail, and a triangular connecting plate is fixedly provided at the end of the first hood and fixedly connected to the sliding ball through a vertex of the triangular connecting plate.

[0012] Optionally, in the above-mentioned folding engine hood, a detonating device is arranged in the guide track, the detonating device is closer to the front end of the vehicle body than the sliding ball, and the detonating device is arranged close to the sliding ball to apply a thrust to the sliding ball toward the rear of the vehicle body when detonating.

[0013] Optionally, the above-mentioned foldable engine hood also includes a camera, which is communicatively connected to the airbag controller. When the camera detects that the pre-collision distance between the vehicle body and the collision object is less than a first preset distance, it feeds back to the airbag controller to activate the ignition part in the detonation device and trigger the lifting action of the main body.

[0014] Optionally, in the above-mentioned foldable engine hood, it also includes a primary ignition device arranged between the main body and the guide track, the primary ignition device is communicatively connected with the airbag controller, and the airbag controller synchronously starts the detonation device and the primary ignition device.

[0015] Optionally, in the above-mentioned foldable engine hood, two guide rails are provided and are arranged parallel and at intervals along the width direction of the vehicle body.

[0016] In a second aspect, an embodiment of the present invention provides a vehicle, wherein a foldable engine hood provided by any of the above embodiments is arranged above the front engine.

[0017] It can be seen from the above technical scheme that the foldable engine hood provided by the utility model is configured such that the main body is provided as a segmented and hinged structure, and a guide track is provided at the bottom of the main body, so as to drive the folding of the main body and the protrusion in the vertical direction through the movement of a sliding ball slidably arranged on the guide track. The sliding ball is provided at the front end of the vehicle body, so that when it is subjected to a force acting toward the rear of the vehicle body, it can move toward the rear side of the vehicle body at the first time and drive the protrusion of the main body to move. When the sliding ball moves to the locking portion, the sliding ball stops moving and the main body maintains a stable protrusion structure. In the above structure, the main body can be lifted in the vertical direction to increase the overall thickness of the front side of the vehicle body. When a vehicle rear-ends a truck, the vehicle body can directly contact the rear of the truck with a higher chassis due to the lifting effect of the main body, which reduces the risk of the vehicle being embedded between the truck chassis and the ground and avoids the truck chassis directly invading the cockpit. At the same time, the main body of the folding structure has a better energy absorption effect, which reduces the damage to the cockpit area caused by the collision. On the other hand, the raised main body enables the vehicle body to directly contact the rear of the truck, and a rigid collision is generated during the collision, causing the vehicle to significantly slow down. The large deceleration can be accurately collected by the vehicle's collision sensor and the airbag can be promptly fed back to pop out, thereby protecting the occupants in the car and increasing the occupants' chance of survival. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the utility model can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0019] Figure 1 It is a schematic diagram of the lateral structure of the foldable engine hood provided by the embodiment of the utility model when the vehicle is in a normal driving state;

[0020] Figure 2 It is a schematic diagram of the lateral structure of the folding engine hood when the sliding ball moves toward the rear of the vehicle body;

[0021] Figure 3 It is a schematic diagram of the lateral structure of the folding engine hood when the sliding ball moves on the locking portion;

[0022] Figure 4 It is a top view schematic diagram of the subject.

[0023] Among them, 110-first engine cover; 120-second engine cover; 130-connecting shaft; 20-guide rail; 210-locking part; 220-detonating device; 30-sliding ball; 40-thrust triangle; 50-triangular connecting plate; 60-first-stage ignition device. DETAILED DESCRIPTION

[0024] One of the important reasons that affects the survival probability of occupants in a rear-end collision scenario between a small vehicle and a truck is that the front side of the small vehicle is lower, while the chassis and box of the truck are higher from the ground. Therefore, the small vehicle will be embedded in the space between the chassis of the truck and the ground. The rear end of the truck directly impacts the A-pillar area of ​​the vehicle and invades the vehicle, causing direct harm to the occupants. At the same time, since the front side of the small vehicle has no rigid collision in the first moment of the rear-end collision, the collision sensor of the small vehicle cannot collect a large deceleration in a short time, and there is a risk that the airbag cannot pop out in time, which is also a factor in the low survival rate of the occupants.

[0025] In order to make the technical personnel in this field better understand the present invention, the embodiments of the present invention are described below with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary for the solutions of the utility model described in the claims.

[0026] See also Figure 1-4 The foldable engine hood provided by the embodiment of the utility model mainly includes a main body and a guide track 20 arranged at the bottom of the main body, wherein the main body is designed as a segmented structure in the length direction of the vehicle body, and the partition structure of the main body is hingedly connected so that two adjacent segment structures can rotate along the hinge points of the two; at the same time, the first end of the main body is hinged to the vehicle body, which is usually hinged to the position on the front side of the A-pillar of the vehicle body to meet the opening of the main body so that the user can inspect the internal equipment. This structure is the same as the connection structure between the main body and the vehicle body in the prior art and will not be repeated here. The second end of the main body, that is, the end of the main body located at the front side of the length direction of the vehicle body, is fixedly connected with a sliding ball 30. More specifically, in each segment structure of the main body The front end of a section of the structure located at the frontmost side in the forward direction of the vehicle body is fixedly connected with a sliding ball 30, and the sliding ball 30 is slidably set on the guide rail 20 so as to be able to slide along the guide rail 20. The specific guiding direction of the guide rail 20 is along the length direction of the vehicle body. It should be noted that a locking portion 210 is provided in the non-end area of ​​the guide rail 20. The locking portion 210 is used to limit and lock the sliding ball 30. The non-end area here refers to the middle position of the guide rail 20 on the guide path. It should be noted that the guide rail 20 is preferably the same as the setting length of the main body in the length direction of the vehicle body, so its non-end area is the position between the first end and the second end of the main body.

[0027] In the above structure, the sliding ball 30 will be pushed to slide along the guide path of the guide track 20 when it is subjected to a force acting toward the rear of the vehicle body, and at the same time, the sliding ball 30 will drive the first end of the main body to move toward the rear of the vehicle body. Since the structure of the main body is a segmented and hinged structure, when the main body is driven by the sliding ball 30 to generate a movement of the first end toward the rear of the vehicle body, its segmented structure will rotate along the hinge point to lift the main body in the vertical direction. At the same time, when the sliding ball 30 is locked to the locking portion 210, the various segments of the main body stop rotating. At the same time, due to the action of the sliding ball 30, the main body is in a vertically upward protruding structure and is maintained; based on the movement state of the above structure, in this embodiment, when the vehicle body collides with the vehicle in front, the sliding ball 30 is subjected to force and drives the first segment of the main body to the rear of the vehicle body The segmented hinged structure of the main body enables it to be lifted in the vertical direction and maintain a stable raised state after the sliding ball 30 moves to the locking portion 210 on the guide track 20. At this time, the overall thickness of the front side of the vehicle body is increased. When the vehicle body collides with a truck with a higher chassis, the thicker front side of the vehicle body can directly contact the rear of the truck instead of being embedded between the chassis of the truck and the ground, thereby partially absorbing the collision force, and its raised structure can further absorb energy through deformation to provide protection for the occupants in the vehicle. At the same time, the raised main body enables the front side of the vehicle body to directly contact the rear of the truck and produce a rigid collision, which causes the vehicle to significantly slow down. The collision sensor of the vehicle can detect a large deceleration and feedback the airbag to pop out in time, thereby protecting the occupants.

[0028] The foldable engine hood provided by the embodiment of the utility model is configured with a main body as a segmented and hinged structure, and a guide track 20 is provided at the bottom of the main body, so that the main body can be folded and bulged in the vertical direction by the movement of a sliding ball 30 slidably arranged on the guide track 20. The sliding ball 30 is arranged at the front end of the vehicle body, so that when a force is applied toward the rear of the vehicle body, it can move toward the rear side of the vehicle body at the first time and drive the bulge of the main body to move. When the sliding ball 30 moves to the locking portion 210, the sliding ball 30 stops moving and the main body maintains a stable bulge structure. In the above structure, the main body can be lifted in the vertical direction to increase the overall thickness of the front side of the vehicle body. When a vehicle collides with a truck from behind, the vehicle body can directly contact the rear of the truck with a higher chassis due to the lifting effect of the main body, which reduces the risk of the vehicle being embedded between the truck chassis and the ground and avoids the truck chassis directly invading the cockpit. At the same time, the main body of the folding structure has a better energy absorption effect, which reduces the damage to the cockpit area caused by the collision. On the other hand, the raised main body enables the vehicle body to directly contact the rear of the truck, and a rigid collision is generated during the collision, causing the vehicle to significantly slow down. The large deceleration can be accurately collected by the vehicle's collision sensor and the airbag can be promptly fed back to pop out, thereby protecting the occupants in the car and increasing the occupants' chance of survival.

[0029] In some embodiments of the utility model, in order to facilitate manufacturing and assembly and ensure that the lifting effect of the main body meets the contact requirements with the truck chassis, the main body is arranged as a two-section structure, which includes a first hood 110 and a second hood 120 arranged flatly along the length direction of the vehicle body, wherein the first hood 110 is arranged closer to the front end of the vehicle body, and correspondingly, the front end of the first hood 110 in the length direction of the vehicle body is fixedly connected to the sliding ball 30, and at the same time, the first hood 110 and the second hood 120 are hinged by a connecting shaft 130 that is arranged through the width direction of the vehicle body. The through arrangement of the connecting shaft 130 enables the first hood 110 and the second hood 120 to have a sufficient length of the hinge area, thereby achieving a stable rotation connection effect, and when the main body of the two-section structure is lifted in the vertical direction, it can maximize the height increase of the vehicle body and meet its direct rigid contact with the truck chassis.

[0030] It should be noted that setting the main body as a two-section hinged structure including a first hood 110 and a second hood 120 can maximize the lifting height of the main body to meet the effective rigid contact between the main body and the truck chassis. Similarly, if the main body is set to an hinged structure with more sections, it will lead to a decrease in the lifting height, but the multi-layer structure has a more effective energy absorption effect after lifting. Therefore, designers can choose the number of main body sections according to the height of the vehicle model. For vehicles with a higher front foundation thickness, the main body can be set to a multi-section structure to optimize the energy absorption protection effect while meeting the contact with the truck chassis when rear-ending the truck. For vehicles with a thinner front foundation thickness, it is preferred to adopt a two-section hinged structure of the first hood 110 and the second hood 120 to obtain the maximum main body lifting height and meet the rigid collision requirements with the rear of the truck.

[0031] On the basis of the above embodiment, it is preferred that the first hood 110 and the second hood 120 are set to have equal lengths in the front and rear directions of the vehicle body, so that the first hood 110 and the second hood 120 form a stable isosceles triangle structure with the vehicle body after they are raised; at the same time, the locking portion 210 is preferably arranged directly below the connecting shaft 130. The above structure enables the sliding ball 30 to move on the guide rail 20 toward the rear of the vehicle body, and when the locking portion 210 is engaged, the lengths of the first hood 110 and the second hood 120 on the raised main body are equal. At the same time, since the hinge points of the locking portion 210 and the second hood 120 on the vehicle body are at an equal distance, from the perspective of both sides on the width of the vehicle body, the first hood 110 and the second hood 120 that are raised and connected can form a stable triangular configuration close to an equilateral triangle with the vehicle body on the basis of the isosceles triangle, so that the front lifting structure of the vehicle body has optimal stability and improves its energy absorption effect during the collision process.

[0032] In addition, considering that in the foldable engine hood provided in the embodiment of the utility model, the structure in which the main body maintains a stable structure after being lifted is an important basis for achieving a rigid collision with the truck to absorb energy and provide airbag ejection feedback, in some embodiments of the utility model, thrust triangles 40 are respectively provided at the bottom of the hinged end areas of the first hood 110 and the second hood 120. The thrust triangles 40 are rigid triangular plate structures, the tip of which points downward in the normal operation state of the vehicle, and are lifted synchronously with the hinged ends of the first hood 110 and the second hood 120 when the sliding ball 30 moves toward the rear of the vehicle body. When the sliding ball 30 runs and is locked in the locking portion 210, one side of the two thrust triangles 40 abuts against each other to form a limiting structure from the tips of the hinged areas of the first hood 110 and the second hood 120, and the first hood 110 and the second hood 120 are abutted and limited by filling the tip area, thereby maintaining the stable support structure of the first hood 110 and the second hood 120 in the lifted state.

[0033] It should be noted that the thrust triangle 40 is preferably an isosceles right triangle structure, and its right-angled end point is downward when the vehicle is in normal operation. Correspondingly, when the sliding ball 30 is running and locked on the locking portion 210, one right-angled side of each of the two thrust triangles 40 is in contact and abutment and is located in the vertical direction, while the other right-angled side is in contact and abutment with the first hood 110 and the second hood 120 respectively, so that the limiting structure is more evenly stressed and has a stable filling and abutment limiting effect.

[0034] Furthermore, in order to reduce the structural complexity of the foldable engine hood and reduce the production and assembly costs, in some embodiments of the present invention, the locking portion 210 is a groove structure recessed in the surface of the guide track 20 to facilitate production and installation. When the sliding ball 30 moves to the position of the locking portion 210, it is embedded in the groove structure to be locked and cannot continue to move along the guide track 20. At the same time, in order to ensure the locking effect of the groove structure on the sliding ball 30, a triangular connecting plate 50 is also fixedly provided at the end of the first engine hood 110 in the embodiment of the present invention. The first hood 110 is fixedly connected to the sliding ball 30 through a vertex position of the triangular connecting plate 50. When the sliding ball 30 moves to the locking portion 210 of the groove structure, the first hood 110 is in a lifted state and exerts downward pressure on the triangular connecting plate 50, and applies vertical downward pressure to the sliding ball 30 through the vertex where the triangular connecting plate 50 contacts the sliding ball 30, so as to increase the pressure through the action of the tip so that the sliding ball 30 is stably located in the locking portion 210, thereby maintaining the first hood 110 and the second hood 120 in a stably lifted state.

[0035] Furthermore, considering that in the scenario where a vehicle rear-ends a truck, the collision effect on the front side of the vehicle body may not be able to trigger the sliding ball 30 in the first time to achieve the lifting of the main body, in some embodiments of the utility model, a detonating device 220 is further provided in the guide track 20. The detonating device 220 is closer to the front end of the vehicle body than the sliding ball 30. At the same time, the detonating device 220 needs to be arranged close to the sliding ball 30. Specifically, the spacing between the detonating device 220 and the sliding ball 30 is less than the preset distance. It should be noted that the preset distance here is determined by the designer according to the force effect generated when the detonating device 220 is detonated. It is only necessary to ensure that at the preset distance, the force of the detonating device 220 can act on the sliding ball 30 and push the sliding ball 30 to move toward the rear of the vehicle body. In addition, it should be noted that the triggering force of the detonating device 220 is smaller than the collision triggering force of the sliding ball 30, so that it is triggered first during the collision process and acts as a driving force to push the movement of the sliding ball 30 and drive the lifting of the main body.

[0036] On the basis of the above-mentioned embodiment, in order to enhance the lifting triggering effect of the main body, the embodiment of the utility model is further provided with a camera, which may be a smart driving camera commonly used in the vehicle industry, and the camera is communicatively connected with the airbag controller so as to be able to feedback a signal to the airbag controller. Specifically, when the camera detects that the pre-collision distance between the vehicle body and the collision object is less than the first preset distance, a collision risk signal is fed back to the airbag controller, and the airbag controller is mechanically or communicatively connected to the ignition part in the detonation device 220, so as to start the ignition part and trigger the lifting action of the main body after receiving the collision risk signal from the camera, so as to trigger the lifting of the main body before the vehicle collides, thereby ensuring that the vertical height of the main body has been lifted when the vehicle collides, and realizing a rigid collision with the truck chassis.

[0037] It should be further explained that when the detonation device 220 is triggered by the airbag controller, the detonation device 220 and the sliding ball 30 can also be arranged on the side of the main body facing the rear of the vehicle body, that is, the lifting process of the main body is regulated by the airbag controller, and the sliding ball 30 is at the end where the main body and the vehicle body are hinged, and is subjected to the thrust toward the front of the vehicle body applied by the detonation device 220, thereby driving the main body to fold toward the front side of the vehicle. While maintaining the lifting effect of the main body, the structure of the lifted main body is located at the front side of the vehicle and further away from the cockpit position, thereby increasing the distance between the lifted structure of the main body and the A-pillar, increasing the collision buffer space, and more effectively protecting the safety of the occupants.

[0038] In order to further optimize the above technical solution, improve the lifting speed and lifting effect of the main body, and avoid the main body from being compressed vertically downward during the extrusion process, an embodiment of the utility model is further provided with a first-level ignition device 60 between the main body and the guide rail 20. The first-level ignition device 60 is also communicated with the airbag controller, and in order to simplify the feedback adjustment process, the airbag controller synchronizes the start-up adjustment of the detonation device 220 and the first-level ignition device 60. When the airbag controller receives the collision risk signal, the detonation device 220 and the first-level ignition device 60 are started synchronously. The detonation device 220 applies a force to the sliding ball 30 to move toward the rear of the vehicle body, and the first-level ignition device 60 provides a vertical upward thrust for the main body. The coordinated action of the detonation device 220 and the first-level ignition device 60 can enable the main body to be quickly lifted vertically upward to meet the thickness increase effect on the front side of the vehicle body.

[0039] It should also be noted that when the main body is set as a two-stage structure, it is preferred that the first-stage ignition device 60 is set directly below the hinge position of the two-stage structure, so that the first-stage ignition device 60 can simultaneously generate a lifting force on the two structures of the two-stage structure when triggered. Compared with applying a lifting force alone, the lifting of the main body is faster and has a more symmetrical and stable lifting posture.

[0040] Furthermore, in the foldable engine hood provided in the embodiment of the utility model, a single guide rail 20 can be provided, which is arranged on the bisector of the vehicle body so that the lifting process of the two side areas remains stable. At the same time, two guide rails 20 can also be provided in parallel and at intervals along the width direction of the vehicle body, and preferably, the two guide rails 20 are symmetrically arranged along the bisector of the vehicle body, so that the two sides of the main body are supported by contact with the guide rails 20 through the sliding balls 30, so that the main body is more stable during the lifting process and is not easy to collapse.

[0041] An embodiment of the utility model also provides a vehicle, which is provided with a folding engine hood provided by any of the above embodiments above the engine on the front side. It should be noted that since the folding engine hood has the technical effects provided by the above embodiments, the present vehicle also has the above technical effects, which will not be repeated herein.

[0042] It should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the utility model can be combined with each other.

[0043] As shown in the utility model and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0044] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0045] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. The scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but also should cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the above-mentioned utility model. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) to form a technical solution.

Claims

1. A foldable engine hood, characterized in that: The vehicle comprises a main body and a guide track arranged at the bottom of the main body, wherein the main body is divided into sections in the length direction of the vehicle body and each section is hinged, a first end of the main body is hinged to the vehicle body, and a sliding ball is fixedly connected to the second end, and the sliding ball is slidably arranged on the guide track, the guiding direction of the guide track is along the length direction of the vehicle body, and a locking portion is arranged in the non-end area of ​​the guide track; When the sliding ball is acted upon by a force toward the rear of the vehicle body, the sliding ball drives the first end of the main body to move toward the rear of the vehicle body and lifts the main body. When the sliding ball is locked on the locking portion, the main body protrudes vertically upward.

2. The foldable engine hood according to claim 1, characterized in that: The main body comprises a first hood and a second hood arranged flatly along the length direction of the vehicle body, the first hood being close to the front end of the vehicle body and being hinged to the second hood via a connecting shaft arranged through along the width direction of the vehicle body.

3. The foldable engine hood according to claim 2, characterized in that: The first hood and the second hood have the same length in the front-rear direction of the vehicle body, and the locking portion is arranged directly below the connecting shaft.

4. The foldable engine hood according to claim 2, characterized in that: The bottom of the hinged end of the first hood and the second hood is respectively provided with a thrust triangle part, and the thrust triangle is a rigid plate structure. When the sliding ball is locked on the locking part, one side edge of the two thrust triangle parts abuts against and limits the first hood and the second hood.

5. The foldable engine hood according to claim 2, characterized in that: The locking portion is a groove structure sunken in the surface of the guide rail. A triangular connecting plate is fixedly provided at the end of the first hood and is fixedly connected to the sliding ball via a vertex of the triangular connecting plate.

6. The foldable engine hood according to claim 1, characterized in that: A detonating device is arranged in the guide track, the detonating device is closer to the front end of the vehicle body than the sliding ball, and the detonating device is arranged close to the sliding ball to apply a thrust to the sliding ball to move toward the rear of the vehicle body when detonating.

7. The foldable engine hood according to claim 6, characterized in that: It also includes a camera, which is communicatively connected to the airbag controller. When the camera detects that the pre-collision distance between the vehicle body and the collision object is less than a first preset distance, it feeds back to the airbag controller to start the ignition part in the detonation device and trigger the lifting action of the main body.

8. The foldable engine hood according to claim 7, characterized in that: It also includes a primary ignition device disposed between the main body and the guide track, wherein the primary ignition device is communicatively connected with the airbag controller, and the airbag controller synchronously starts the detonation device and the primary ignition device.

9. The foldable engine hood according to claim 1, characterized in that: Two guide rails are provided and are arranged parallel and at intervals along the width direction of the vehicle body.

10. A vehicle, characterized in that: A foldable engine hood according to any one of claims 1 to 9 is arranged above the engine on the front side.

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