Active hinge for engine cover

Abstract

The utility model provides a driving hinge for an engine cover, and belongs to the technical field of automobile parts. The cover plate is provided with a bouncing seat capable of bouncing; one end of the long hinge rod is hinged to the base in a sliding mode, and the other end of the long hinge rod is hinged to the cover plate in a sliding mode; one end of the short hinge rod is hinged to the base, and the other end of the short hinge rod is hinged to the cover plate; one end of the short arm rod is hinged to the long hinge rod, and the other end of the short arm rod is hinged to the cover plate; the hinge has the advantages that the two ends of the long hinge rod of the hinge are hinged to the base and the cover plate in the sliding mode respectively, the design is matched with the short arm rod so that the cover plate can move to the bouncing interval from the closed position when the bouncing base bounces, and therefore the hinge can reach the very high bouncing height; the applicable vehicle type range of the driving hinge is greatly expanded, and the driving hinge is particularly suitable for car running vehicle types with sunken front covers.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts and relates to an active hinge for an engine hood. Background Art

[0002] The pedestrian protection performance of automobiles is becoming more and more important. With the imminent enforcement of pedestrian protection regulations and the addition of pedestrian protection as an evaluation criterion in 2018 CNCAP, pedestrian protection technology on automobiles is becoming more and more common. Currently, the pedestrian protection design for local areas or points is mainly achieved through the application of energy-absorbing materials on the body, local weakening of the hood, prominent characteristic lines of the styling, crushed bracket design and other means.

[0003] The hood height should not be lowered due to the requirements of styling, wind resistance and downward vision, while the engine compartment layout has a fixed ground clearance requirement, which has caused several major contradictions between the layout and regulations. Simply weakening the design locally is far from meeting the requirements. In order to achieve higher pedestrian head collision performance, an active pedestrian protection hood hinge system is required to ensure that the hood can be designed very low under normal conditions. In the event of a collision, the active hinge system will actively lift the hood, thereby increasing the energy absorption space, reducing the damage value, and meeting pedestrian protection regulations and CNCAP requirements.

[0004] Currently, there are engine hood hinges that can actively pop up. For example, a Chinese utility model patent with application number 201821064487.X discloses an active pop-up engine hood hinge device. This active hinge can pop open the engine hood before a vehicle collision. However, the design of this hinge has certain limitations. Its pop-up height is not high enough, so the range of applicable vehicle models is small, especially it is not suitable for coupe models with sunken front hoods. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes an active hinge for an engine hood.

[0006] The purpose of the utility model can be achieved through the following technical solutions: An active hinge for an engine hood, comprising:

[0007] Base;

[0008] A cover plate, wherein the cover plate is provided with a pop-up seat;

[0009] A long hinged rod, one end of which is slidably hinged to the base, and the other end of which is slidably hinged to the cover plate;

[0010] a short hinged rod, one end of which is hinged to the base and the other end of which is hinged to the cover plate;

[0011] A short arm, one end of which is hinged to the long hinged rod and the other end of which is hinged to the cover plate;

[0012] The travel position of the cover plate relative to the base includes an open position and a closed position, and a pop-up interval is formed between the open position and the closed position;

[0013] When the active hinge actively pops up from the closed state, the pop-up seat pops up on the cover plate and the cover plate moves from the closed position to the pop-up interval.

[0014] Preferably, the base is provided with a first slide groove, one end of the long hinge rod has a first pin shaft, and the first pin shaft is slidably installed in the first slide groove;

[0015] The first slide groove includes a first position and a second position; when the cover is in the closed position, the first pin is located at the first position; when the cover is in the open position, the first pin is located at the second position; when the active hinge actively pops up from the closed state, the first pin slides from the first position to the second position.

[0016] Preferably, the cover plate is provided with a second slide groove, the other end of the long hinge rod is provided with a second pin shaft, and the second pin shaft is slidably installed in the second slide groove;

[0017] The second slide groove includes a third position and a fourth position; when the cover is in the closed position, the second pin shaft is located at the third position; when the cover is in the open position, the second pin shaft is located at the fourth position; when the active hinge actively pops up from the closed state, the second pin shaft slides from the third position to the fourth position.

[0018] Preferably, the long hinged rod is provided with a closing limit block, and when the cover is in the closed position, the closing limit block is abutted and connected with the cover; the base is provided with an opening limit block, and when the cover is in the open position, the opening limit block is abutted and connected with the short hinged rod.

[0019] Preferably, one end of the pop-up seat is hinged to the cover plate, one of the pop-up seat and the cover plate is provided with a limiting hole and the other is provided with a limiting block;

[0020] When the pop-up seat is in a non-pop-up state, the limiting block is located in the limiting hole and keeps the pop-up seat and the cover plate relatively fixed; when the limiting block is separated from the limiting hole, the pop-up seat is allowed to rotate relative to the cover plate.

[0021] Preferably, one of the pop-up seat and the cover plate is provided with a limiting pin and the other is provided with a limiting groove, and the limiting pin is located in the limiting groove.

[0022] Preferably, the pop-up seat is provided with an elastic sheet, and the elastic sheet is provided with a drop limit block, and the drop limit block passes through the pop-up seat; when the pop-up seat drops to the extreme position after popping up, the drop limit block is connected with the cover plate in abutment.

[0023] Preferably, the length of the short articulated rod is greater than that of the short arm rod, the length of the long articulated rod is greater than that of the short articulated rod, and the length of the long articulated rod is greater than the sum of the lengths of the short articulated rod and the short arm rod.

[0024] Preferably, the base, the cover plate, the long hinged rod and the short hinged rod form a four-bar linkage.

[0025] Preferably, the cover plate, the long hinged rod and the short arm rod form a triangular structure.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. The two ends of the long hinge rod of the hinge are respectively slidably hinged to the base and the cover plate. This design, together with the short arm rod, can move the cover plate from the closed position to the pop-up interval when the pop-up seat pops up, so that the hinge can reach a very high pop-up height, greatly increasing the applicable vehicle model range of the active hinge, especially for coupe models with sunken front covers.

[0028] 2. The cooperation between the first sliding groove on the base and the first pin of the long hinged rod enables one end of the long hinged rod to slide on the base and be hinged to the base. The cooperation between the second sliding groove on the cover plate and the second pin of the long hinged rod enables the other end of the long hinged rod to slide on the cover plate and be hinged to the cover plate.

[0029] 3. When the active hinge is in normal use, that is, when the engine hood is opened or closed normally, the limiting block is located in the limiting hole, so that the pop-up seat and the cover plate remain relatively fixed; when the engine hood actively pops up, the pop-up seat is acted upon by the driving force, causing the limiting block to deform or break and separate from the limiting hole, at which time the pop-up seat is allowed to rotate freely relative to the cover plate.

[0030] 4. The cooperation between the limit pin and the limit slot serves to constrain the movement trajectory of the pop-up seat. When the collision sensor is triggered, the cooperation mechanism of the limit pin and the limit slot allows the pop-up seat to bounce up smoothly along the predetermined trajectory, ensuring that the engine hood can be lifted up quickly in the event of a collision, providing sufficient buffer space for the pedestrian's head, thereby reducing the risk of pedestrian injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the active hinge of the utility model in an open state.

[0032] Figure 2 This is a schematic diagram from another perspective when the active hinge of the utility model is in an open state.

[0033] Figure 3 It is a schematic diagram of the active hinge of the utility model in a closed state.

[0034] Figure 4 It is a schematic diagram of the active hinge of the utility model in a pop-up state.

[0035] Figure 5 It is a schematic diagram from another perspective when the active hinge of the utility model is in a pop-up state.

[0036] In the figure, 100, base; 110, first slide groove; 120, opening limit block; 200, cover plate; 210, second slide groove; 220, limit block; 230, limit groove; 300, pop-up seat; 310, limit hole; 320, limit pin; 330, elastic sheet; 331, falling limit block; 400, long hinge rod; 410, first pin shaft; 420, second pin shaft; 430, closing limit block; 500, short hinge rod; 600, short arm rod. DETAILED DESCRIPTION

[0037] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0038] like Figure 1-5 As shown, an active hinge for an engine hood comprises: a base 100; a cover plate 200, wherein the cover plate 200 is provided with a pop-up seat 300; a long hinge rod 400, wherein one end of the long hinge rod 400 is slidably hinged to the base 100, and the other end of the long hinge rod 400 is slidably hinged to the cover plate 200; a short hinge rod 500, wherein one end of the short hinge rod 500 is hinged to the base 100 and the other end is hinged to the cover plate 200; a short arm rod 600, wherein one end of the short arm rod 600 is hinged to the long hinge rod 400 and the other end is hinged to the cover plate 200; the travel position of the cover plate 200 relative to the base 100 comprises an open position and a closed position, and a pop-up interval is formed between the open position and the closed position; when the active hinge actively pops up from the closed state, the pop-up seat 300 pops up on the cover plate 200 and the cover plate 200 moves from the closed position to the pop-up interval.

[0039] Based on the above embodiment, the length of the short articulated rod 500 is greater than the length of the short arm rod 600, the length of the long articulated rod 400 is greater than the length of the short articulated rod 500, and the length of the long articulated rod 400 is greater than the sum of the lengths of the short articulated rod 500 and the short arm rod 600.

[0040] On the basis of the above embodiment, the base 100 , the cover plate 200 , the long hinge rod 400 and the short hinge rod 500 form a four-bar linkage.

[0041] On the basis of the above embodiment, the cover plate 200 , the long hinge rod 400 and the short arm rod 600 form a triangular structure.

[0042] The combination of the four-bar linkage and the triangular structure enables the engine hood to reach a higher position when it pops up. That is, when the pop-up seat 300 is pushed, the four-bar linkage and the triangular structure can cause the cover plate 200 to move from the closed position to the open position (that is, enter a certain position in the pop-up range), which significantly improves the energy absorption space during a collision.

[0043] The present design aims to provide an active hinge system for an engine hood, wherein a pop-up seat 300 is mounted on the cover plate 200, the two ends of a long hinged rod 400 are respectively hinged to a base 100 and the cover plate 200 and can slide, the two ends of a short hinged rod 500 are simply hinged to the base 100 and the cover plate 200, and the two ends of a short arm rod 600 are respectively hinged to the long hinged rod 400 and the cover plate 200, forming a composite connecting rod system.

[0044] The advantage of this connecting rod system is that the cover plate 200 can move to the open position or the closed position relative to the base 100 to open or close the engine hood. On this basis, when the active hinge pops up, the driving force causes the pop-up seat 300 to pop up from the cover plate 200. At the same time, this driving force also causes the cover plate 200 to move from the closed position to the open position and finally stay at a certain position in the pop-up interval (that is, the cover plate 200 pops up to a certain height), so that the engine hood has a larger pop-up height when it is actively popped up. Specifically, through the sliding design at both ends of the long hinge rod 400, combined with the action of the short arm rod 600, when the engine hood pops up, the cover plate 200 can pop up, and at the same time, the pop-up seat 300 pops up again on the basis of the cover plate, thereby reaching a higher pop-up position, increasing the energy absorption space during collision, and helping to reduce pedestrian injuries.

[0045] When the vehicle is driving, the engine hood is in a closed state, that is, the cover plate 200 is in a closed position. However, when a collision is detected, the active hinge system will be activated, and the pop-up seat 300 will be pushed and pop up on the cover plate 200. At the same time, this push force causes the cover plate 200 to move from the closed position to the open position (that is, to a certain position in the pop-up interval), so that the active hinge has a higher pop-up height, which significantly increases the energy absorption space during a collision, thereby effectively reducing the impact force on the pedestrian's head and improving the level of pedestrian protection. This design is particularly suitable for coupe-type models with sunken front covers, solving the problem of limited applicability of traditional active hinges due to insufficient pop-up height.

[0046] like Figure 1-5 As shown, on the basis of the above embodiment, the base 100 is provided with a first slide groove 110, and one end of the long hinge rod 400 has a first pin shaft 410, and the first pin shaft 410 can be slidably installed in the first slide groove 110; the first slide groove 110 includes a first position and a second position; when the cover 200 is in the closed position, the first pin shaft 410 is located at the first position; when the cover 200 is in the open position, the first pin shaft 410 is located at the second position; when the active hinge actively pops up from the closed state, the first pin shaft 410 slides from the first position to the second position.

[0047] On the basis of the above embodiment, the cover 200 is provided with a second slide groove 210, and the other end of the long hinge rod 400 has a second pin shaft 420, and the second pin shaft 420 can be slidably installed in the second slide groove 210; the second slide groove 210 includes a third position and a fourth position; when the cover 200 is in the closed position, the second pin shaft 420 is located at the third position; when the cover 200 is in the open position, the second pin shaft 420 is located at the fourth position; when the active hinge actively pops up from the closed state, the second pin shaft 420 slides from the third position to the fourth position.

[0048] The cooperation between the first slide groove 110 on the base 100 and the first pin 410 of the long hinged rod 400 enables one end of the long hinged rod 400 to slide on the base 100 and to be hinged to the base 100. The cooperation between the second slide groove 210 on the cover plate 200 and the second pin 420 of the long hinged rod 400 enables the other end of the long hinged rod 400 to slide on the cover plate 200 and to be hinged to the cover plate 200.

[0049] Through the above-mentioned design, when the active hinge actively pops up, the pop-up seat 300 and the cover plate 200 are simultaneously acted upon by the driving force, and the cover plate 200 moves from the closed position to the open position under the action of the driving force, that is, the first pin shaft 410 moves from the first position to the second position, and the second pin shaft 420 moves from the third position to the fourth position, and at the same time, the pop-up seat 300 breaks away from the restraint of the cover plate 200 and pops up; and when the cover plate 200 is in the pop-up interval, the first pin shaft 410 is between the first position and the second position, and the second pin shaft 420 is between the third position and the fourth position.

[0050] On the basis of the above embodiment, the long hinged rod 400 is provided with a closing limit block 430. When the cover plate 200 is in the closed position, the closing limit block 430 is in contact with the cover plate 200. The base 100 is provided with an opening limit block 120. When the cover plate 200 is in the open position, the opening limit block 120 is in contact with the short hinged rod 500.

[0051] The function of the closing limit block 430 is to provide a physical stop when the cover 200 is fully closed, playing a limiting role for the active hinge when it is closed; the function of the opening limit block 120 is to contact and connect with the short hinge rod 500 when the cover 200 is in the open position to perform a limit stop.

[0052] like Figure 1-5 As shown, on the basis of the above embodiment, one end of the pop-up seat 300 is hinged to the cover plate 200, one of the pop-up seat 300 and the cover plate 200 is provided with a limiting hole 310 and the other is provided with a limiting block 220; when the pop-up seat 300 is in a non-pop-up state, the limiting block 220 is located in the limiting hole 310 and keeps the pop-up seat 300 and the cover plate 200 relatively fixed; when the limiting block 220 is separated from the limiting hole 310, the pop-up seat 300 is allowed to rotate relative to the cover plate 200.

[0053] When the active hinge is in normal use, that is, when the engine hood is normally opened or closed, the limiting block 220 is located in the limiting hole 310, so that the pop-up seat 300 and the cover plate 200 remain relatively fixed; when the engine hood actively pops up, the pop-up seat 300 is acted upon by the driving force, causing the limiting block 220 to deform or break and separate from the limiting hole 310, at which time the pop-up seat 300 is allowed to rotate freely relative to the cover plate 200.

[0054] On the basis of the above-mentioned embodiment, one of the pop-up seat 300 and the cover plate 200 is provided with a limiting pin 320 and the other is provided with a limiting groove 230 , and the limiting pin 320 is located in the limiting groove 230 .

[0055] The limit groove 230 is actually an arc-shaped groove structure. The limit pin 320 cooperates with the limit groove 230 to constrain the movement trajectory of the pop-up seat 300. When the collision sensor is triggered, the cooperation mechanism of the limit pin 320 and the limit groove 230 allows the pop-up seat 300 to bounce up smoothly along a predetermined trajectory, ensuring that the engine hood can be quickly lifted up during a collision, providing sufficient buffer space for the pedestrian's head, thereby reducing the risk of pedestrian injury.

[0056] On the basis of the above embodiment, the pop-up seat 300 is provided with an elastic sheet 330, and the elastic sheet 330 is provided with a drop limit block 331, which passes through the pop-up seat 300; when the pop-up seat 300 falls to the extreme position after popping up, the drop limit block 331 is connected with the cover plate 200 in abutment.

[0057] The elastic sheet 330 has a certain elasticity. When the pop-up seat 300 has not popped up, the drop limit block 331 is in contact with the side of the cover plate 200, and the elastic sheet 330 is in a deformed and force-accumulating state. When the pop-up seat 300 pops up to a certain height, the drop limit block 331 is separated from the side of the cover plate 200, and the elastic sheet 330 returns to its original state so that the drop limit block 331 corresponds to the top of the cover plate 200 up and down. When the pop-up seat 300 falls, the drop limit block 331 can be in contact with the top of the cover plate 200 to limit the falling height of the pop-up seat 300.

[0058] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, in the present invention, the descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0060] In the present utility model, unless otherwise clearly stipulated and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited.

[0061] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An active hinge for an engine hood, characterized in that: include: Base (100); A cover plate (200), wherein the cover plate (200) is provided with a pop-up seat (300) that can pop up; A long hinged rod (400), one end of the long hinged rod (400) being slidably hinged to the base (100), and the other end of the long hinged rod (400) being slidably hinged to the cover plate (200); A short hinged rod (500), one end of the short hinged rod (500) being hinged to the base (100) and the other end of the short hinged rod (500) being hinged to the cover plate (200); A short arm rod (600), one end of which is hinged to the long hinge rod (400) and the other end of which is hinged to the cover plate (200); The travel position of the cover plate (200) relative to the base (100) includes an open position and a closed position, and a pop-up interval is formed between the open position and the closed position; When the active hinge actively pops up from a closed state, the pop-up seat (300) pops up on the cover plate (200) and the cover plate (200) moves from the closed position to the pop-up interval.

2. An active hinge for an engine hood as claimed in claim 1, characterized in that: The base (100) is provided with a first slide groove (110), one end of the long hinge rod (400) is provided with a first pin shaft (410), and the first pin shaft (410) is slidably installed in the first slide groove (110); The first slide groove (110) includes a first position and a second position; when the cover plate (200) is in the closed position, the first pin shaft (410) is located at the first position; when the cover plate (200) is in the open position, the first pin shaft (410) is located at the second position; when the active hinge actively pops up from the closed state, the first pin shaft (410) slides from the first position to the second position.

3. An active hinge for an engine hood as claimed in claim 1, characterized in that: The cover plate (200) is provided with a second slide groove (210), and the other end of the long hinge rod (400) is provided with a second pin shaft (420), and the second pin shaft (420) is slidably installed in the second slide groove (210); The second sliding groove (210) includes a third position and a fourth position; when the cover plate (200) is in the closed position, the second pin shaft (420) is located at the third position; when the cover plate (200) is in the open position, the second pin shaft (420) is located at the fourth position; When the active hinge actively bounces up from the closed state, the second pin shaft (420) slides from the third position toward the fourth position.

4. An active hinge for an engine hood as claimed in claim 1, characterized in that: The long hinged rod (400) is provided with a closing limit block (430), and when the cover plate (200) is in the closed position, the closing limit block (430) is in contact with the cover plate (200); the base (100) is provided with an opening limit block (120), and when the cover plate (200) is in the open position, the opening limit block (120) is in contact with the short hinged rod (500).

5. The active hinge for an engine hood according to claim 1, characterized in that: One end of the pop-up seat (300) is hinged to the cover plate (200), one of the pop-up seat (300) and the cover plate (200) is provided with a limiting hole (310) and the other is provided with a limiting block (220); When the pop-up seat (300) is in a non-pop-up state, the limiting block (220) is located in the limiting hole (310) and keeps the pop-up seat (300) and the cover plate (200) relatively fixed; when the limiting block (220) is separated from the limiting hole (310), the pop-up seat (300) is allowed to rotate relative to the cover plate (200).

6. An active hinge for an engine hood as claimed in claim 5, characterized in that: One of the pop-up seat (300) and the cover plate (200) is provided with a limiting pin (320) and the other is provided with a limiting groove (230), wherein the limiting pin (320) is located in the limiting groove (230).

7. An active hinge for an engine hood as claimed in claim 5, characterized in that: The pop-up seat (300) is provided with an elastic sheet (330), and the elastic sheet (330) is provided with a drop limit block (331), and the drop limit block (331) passes through the pop-up seat (300); when the pop-up seat (300) drops to an extreme position after popping up, the drop limit block (331) is in contact with and connected to the cover plate (200).

8. An active hinge for an engine hood according to any one of claims 1 to 7, characterized in that: The length of the short hinged rod (500) is greater than the length of the short arm rod (600), the length of the long hinged rod (400) is greater than the length of the short hinged rod (500), and the length of the long hinged rod (400) is greater than the sum of the lengths of the short hinged rod (500) and the short arm rod (600).

9. An active hinge for an engine hood as claimed in claim 8, characterized in that: The base (100), the cover plate (200), the long hinged rod (400) and the short hinged rod (500) form a four-bar linkage.

10. An active hinge for an engine hood as claimed in claim 8, characterized in that: The cover plate (200), the long hinge rod (400) and the short arm rod (600) form a triangular structure.

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