A returnable engine hood active hinge

Abstract

The application provides a returnable engine cover active hinge, which belongs to the technical field of automobile parts and comprises a vehicle body fixing part and a cover plate fixing part, the cover plate fixing part is hinged to the vehicle body fixing part through a hinge mechanism, a driving element is installed on the hinge mechanism, a rotary push piece is hinged to the cover plate fixing part, one end of the rotary push piece is connected with the driving element in linkage and the other end is provided with a first locking part, a limiting piece is fixedly connected with the hinge mechanism, the limiting piece is provided with a second locking part, the first locking part is connected with the second locking part so as to limit the cover plate fixing part from being popped up, and the cover plate fixing part can be pressed to push the first locking part and the second locking part to be reconnected so as to make the cover plate fixing part return.The active hinge can pop up the engine cover before the vehicle collision, and after being popped up, the active hinge can return by pressing the engine cover, so the active hinge can be repeatedly used.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology and relates to a retractable active hinge for an engine hood. Background Technology

[0002] Pedestrian protection performance of automobiles is becoming increasingly important. With the imminent mandatory implementation of pedestrian protection regulations and the addition of pedestrian protection as an evaluation standard in the 2018 CNCAP, pedestrian protection technology in automobiles is becoming more and more common. Currently, pedestrian protection design for local areas or local points is mainly achieved through the application of energy-absorbing materials in the vehicle body, local weakening of the hood, highlighting of feature lines in the design, and crushable bracket design.

[0003] The design, aerodynamic drag, and downward visibility requirements necessitate maintaining a low hood height, while the engine compartment layout demands a fixed ground clearance. This creates several contradictions between the design and regulations, making it insufficient to simply reduce hood height in certain areas. To achieve superior pedestrian head impact performance, an active pedestrian protection hood hinge system is needed. This system allows the hood to be designed very low under normal conditions, and in the event of a collision, the active hinge system will actively raise the hood, increasing energy absorption space, reducing injury levels, 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, including a rotating arm, a fixed base plate, a starter, and a collision sensor. Its characteristic is that the rotating arm is movably connected to a pop-up arm, which is connected to the fixed base plate via a pin. A torsion spring is fitted onto the pin, with one end of the torsion spring fixed to the pop-up arm and the other end fixed to the fixed base plate. A strip-shaped groove is provided on the fixed base plate, and a positioning pin is provided within the groove. One end of the positioning pin is riveted to the pop-up arm. An anti-rotation hole I is provided on the pop-up arm, and an anti-rotation hole II is provided on the fixed base plate. The front end of the starter is inserted into the anti-rotation hole I and the anti-rotation hole II, and the starter is connected to the collision sensor via a signal line.

[0005] While the aforementioned active hinge can open the engine hood before a vehicle collision, it cannot return to its original position after opening, making it essentially a disposable item that needs to be returned to the dealership for replacement. Therefore, there is room for improvement. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a retractable active hinge for an engine hood.

[0007] The objective of this invention can be achieved through the following technical solution: a retractable engine hood active hinge, comprising: a body fixing component and a hood fixing component, and further comprising:

[0008] A hinge mechanism is provided, wherein the cover plate fixing member is hinged to the vehicle body fixing member via the hinge mechanism, and the cover plate fixing member can spring up relative to the hinge mechanism;

[0009] A driving element, which is mounted on the hinge mechanism;

[0010] A rotating push plate is hinged to the cover plate fixing member, the rotating push plate is provided with a first locking part, and the rotating push plate is linked to the driving element;

[0011] A limiting piece is fixedly connected to the hinge mechanism. The limiting piece is provided with a second locking part. The first locking part is connected to the second locking part to restrict the cover plate fixing member from popping up.

[0012] The driving element can drive the rotating push plate to rotate, thereby separating the first locking part from the second locking part and pushing the cover plate fixing member to pop up through the rotating push plate. Pressing the cover plate fixing member can push the first locking part and the second locking part to reconnect, thereby returning the cover plate fixing member to its original position.

[0013] Preferably, the cover plate fixing member is provided with a tension spring, and the tension spring is connected to the rotating push plate.

[0014] Preferably, the hinge mechanism includes a first hinge piece, a second hinge piece, and a third hinge piece. The first hinge piece and the second hinge piece are both hinged to the vehicle body fixing member. The third hinge piece is hinged to the first hinge piece and the second hinge piece. The cover plate fixing member is hinged to the third hinge piece.

[0015] Preferably, the driving element is fixedly connected to the first hinge piece, and the driving element is provided with a retractable push rod, the push rod is hinged to the rotating push piece, the limiting piece is fixedly connected to the third hinge piece, when the first locking part is connected to the second locking part, the cover plate fixing member is fixedly connected to the third hinge piece through the limiting piece, and when the push rod extends, it pushes the rotating push piece to rotate, thereby separating the first locking part from the second locking part.

[0016] Preferably, the rotating push plate includes a first leg and a second leg, the first leg and the second leg are connected to form an inverted V-shape or L-shape structure, a hinge portion is formed between the first leg and the second leg to be hinged to the cover plate fixing member, the first locking portion is disposed on the first leg, and the push rod is hinged to the second leg.

[0017] Preferably, the first locking part is configured as a hook and the second locking part is configured as a slot, or the first locking part is configured as a slot and the second locking part is configured as a hook.

[0018] Preferably, one end of the third hinge piece has a first hinge point and a second hinge point, and the other end has a third hinge point. The first hinge piece and the second hinge piece are respectively hinged to the first hinge point and the second hinge point, and the third hinge point is used to hinge with the gas spring.

[0019] Preferably, the third hinge piece also has a fourth hinge point at one end corresponding to the third hinge point, and the cover plate fixing member is hinged to the fourth hinge point.

[0020] Preferably, the third hinge piece is provided with a first closing limit block and a first opening limit block, the vehicle body fastener is provided with a second closing limit block, and the second hinge piece is provided with a second opening limit block. When the cover plate fastener is in the closed position, the first closing limit block and the second closing limit block are in contact with each other. When the cover plate fastener is in the open position, the first opening limit block and the second opening limit block are in contact with each other.

[0021] Preferably, the hinge mechanism further includes a stop block located between the first hinge piece and the second hinge piece, and the stop block is fixedly connected to the second hinge piece.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This active hinge can open the engine hood before a vehicle collision, and after opening, the active hinge can be returned to its original position by pressing the engine hood, so it can be reused.

[0024] 2. The drive element can rotate the push plate to push the cover plate fixing part to rotate relative to the hinge mechanism, thereby realizing the purpose of popping open the engine cover.

[0025] 3. The first locking part and the second locking part can be locked together or separated. When the cover plate fixing part rotates toward the third hinge piece, it can drive the first locking part to lock together with the second locking part again, thereby fixing the cover plate fixing part and the third hinge piece together again, thus achieving the effect of returning to the original position after pressing.

[0026] 4. During the return process, the first locking part moves toward the second locking part, and when the first locking part and the second locking part come into contact, they can push the rotating push plate to rotate, thereby opening the first locking part. Then, the tension spring pulls the first locking part and the second locking part to reconnect.

[0027] 5. The stop block can limit the distance between the first hinge piece and the second hinge piece. The larger the opening angle of the active hinge, the smaller the distance between the first hinge piece and the second hinge piece. The stop block located between the first hinge piece and the second hinge piece can play a limiting role and can also reduce the noise when opening. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the active hinge of the present invention when it is open.

[0029] Figure 2 This is a schematic diagram of the active hinge of the present invention in the closed state.

[0030] Figure 3 for Figure 2 A schematic diagram from another perspective.

[0031] Figure 4 This is a schematic diagram of the active hinge of the present invention when it is open.

[0032] Figure 5 for Figure 4 A schematic diagram from another perspective.

[0033] Figure 6 This is a schematic diagram of the hinge mechanism of the present invention.

[0034] Figure 7 This is a schematic diagram of the cover plate fixing member of the present invention in the state when it is not popped open.

[0035] Figure 8 This is an exploded view of the active hinge structure of the present invention.

[0036] Figure 9 This is a schematic diagram of the structure of the rotating push plate of the present invention.

[0037] In the diagram, 100 is a vehicle body fixing component; 111 is a second closing limit block; 200 is a cover plate fixing component; 210 is a tension spring; 300 is a hinge mechanism; 310 is a first hinge piece; 320 is a second hinge piece; 321 is a second opening limit block; 330 is a third hinge piece; 331 is a first hinge point; 332 is a second hinge point; 333 is a third hinge point; 334 is a fourth hinge point; 335 is a first closing limit block; 336 is a first opening limit block; 340 is a stop block; 400 is a driving element; 410 is a push rod; 500 is a rotating push piece; 510 is a first locking part; 520 is a first leg; 530 is a second leg; 540 is a hinge part; 600 is a limit piece; 610 is a second locking part; and 700 is a gas spring. Detailed Implementation

[0038] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0039] like Figure 1-9 As shown, a retractable engine hood active hinge includes: a body fixing member 100, a cover plate fixing member 200, a hinge mechanism 300, a drive element 400, a rotary pusher 500, and a limiting piece 600. This engine hood active hinge can be used on an automobile engine hood. The body fixing member 100 is used for fixed connection with the body, and the cover plate fixing member 200 is used for fixed connection with the automobile engine hood.

[0040] The cover plate fixing member 200 is hinged to the body fixing member 100 through the hinge mechanism 300, that is, the cover plate fixing member 200 can rotate relative to the body fixing member 100 through the hinge structure, so the active hinge can enable the engine cover and the body to open or close.

[0041] The cover plate fixing member 200 is movable relative to the hinge mechanism 300, that is, the cover plate fixing member 200 can spring up relative to the hinge mechanism 300, so the engine cover can be actively opened before the car collides with the pedestrian.

[0042] The driving element 400 is used to drive the cover plate fixing member 200 to actively spring up. The driving element 400 is installed on the hinge mechanism 300, that is, the hinge mechanism 300 is equipped with the driving element 400. The rotating push plate 500 is hinged to the cover plate fixing member 200, so the rotating push plate 500 can rotate. The rotating push plate 500 is provided with a first locking part 510, and the rotating push plate 500 is also linked to the driving element 400.

[0043] In the specific structure, one end of the rotating push plate 500 is linked to the driving element 400 and the other end is provided with a first locking part 510. The driving element 400 can push the rotating push plate 500 to lift the cover plate fixing member 200. The limiting plate 600 is fixedly connected to the hinge mechanism 300. The limiting plate 600 is provided with a second locking part 610. The first locking part 510 and the second locking part 610 are connected to restrict the cover plate fixing member 200 from popping up.

[0044] The cover plate fixing member 200 is provided with a tension spring 210. The tension spring 210 is connected to the rotating push plate 500 and can pull the first locking part 510 and the second locking part 610 to connect. When the cover plate fixing member 200 is resetting, the first locking part 510 contacts the edge of the limiting plate 600 and is pushed away by the limiting plate 600, thereby causing the rotating push plate 500 to rotate. When the first locking part 510 is aligned with the second locking part 610, the tension spring 210 can pull the rotating push plate 500 to rotate in the opposite direction, thereby connecting the first locking part 510 and the second locking part 610 together.

[0045] Specifically, the rotating push plate 500 includes a first leg 520 and a second leg 530. The first leg 520 and the second leg 530 are connected to form an inverted V-shape or L-shape structure, that is, the first leg 520 and the second leg 530 form a certain angle. A hinge portion 540 is formed between the first leg 520 and the second leg 530 to be hinged to the cover plate fixing member 200. The hinge portion 540 is hinged to the cover plate fixing member 200. The first locking part is disposed on the first leg 520. The push rod is hinged to the second leg 530.

[0046] When the active hinge is not open, the first locking part 510 and the second locking part 610 are locked together, so the rotating push plate 500 and the limiting plate 600 are fixedly connected, thereby fixing the cover plate fixing member 200 and the hinge mechanism 300 together. In terms of working principle, one end of the cover plate fixing member 200 is hinged to the hinge mechanism 300, while the other end of the cover plate fixing member 200 is locked together with the limiting plate 600 through the rotating push plate 500. At this time, there are two connection points between the cover plate fixing member 200 and the hinge mechanism 300, so that the cover plate fixing member 200 and the hinge mechanism 300 can be locked together.

[0047] The driving element 400 can drive the rotating push plate 500 to rotate, thereby separating the first locking part 510 from the second locking part 610, and push the cover plate fixing member 200 to pop up through the rotating push plate 500; when the active hinge pops open, the driving element 400 pushes the rotating push plate 500 to rotate, the first locking part 510 separates from the second locking part 610, at this time the cover plate fixing member 200 is unlocked from the hinge mechanism 300, and when the rotating push plate 500 rotates to abut against the cover plate fixing member 200, the driving element 400 can push the cover plate fixing member 200 to rotate relative to the hinge mechanism 300 through the rotating push plate 500, thereby achieving the purpose of popping open the engine cover.

[0048] Pressing the cover plate fixing member 200 can push the first locking part 510 and the second locking part 610 to reconnect, thereby returning the cover plate fixing member 200 to its original position. When the cover plate fixing member 200 is pressed, the cover plate fixing member 200 can rotate toward the hinge mechanism 300, and the first locking part 510 on the rotating push plate 500 can be relocked together with the second locking part 610 on the limiting plate 600, so that the cover plate fixing member 200 is fixedly connected to the hinge mechanism 300. Therefore, after the active hinge is opened, the engine cover can be pressed back to its original position by pressing the engine cover (i.e., pressing the cover plate fixing member 200).

[0049] The specific return principle of the hinge is as follows: one end of the tension spring 210 is connected to the cover plate fixing member 200 and the other end is connected to the first leg 520 of the rotating push plate 500. The tension spring 210 can apply a pulling force to the rotating push plate 500 toward the limiting plate 600. When it is not open, the tension spring 210 can pull the first locking part 510 and the second locking part 610 together. During the return process, the first locking part 510 moves toward the second locking part 610, and the first locking part 510 contacts the limiting plate 600 during the movement, thereby pushing the rotating push plate 500 to rotate and thus opening the first locking part 510. Then the tension spring 210 pulls the first locking part 510 and the second locking part 610 to reconnect.

[0050] like Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8 As shown, the first locking part 510 is configured as a hook and the second locking part 610 is configured as a slot, or the first locking part 510 is configured as a slot and the second locking part 610 is configured as a hook. The first locking part 510 and the second locking part 610 can be configured as a hook and slot structure. When the hook and slot are connected, the rotating push piece 500 and the limiting piece 600 can be locked together, thereby restricting the cover plate fixing member 200 from rotating relative to the third hinge piece 330.

[0051] It should be noted that in the actual structure, the first locking part 510 is configured as a hook and the second locking part 610 is configured as a slot. When the cover plate fixing member 200 returns to its original position, the hook contacts the edge of the limiting piece 600, thereby pushing the rotating pushing piece 500 to rotate, so that the hook is aligned with the slot.

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 8As shown, based on the above embodiment, the hinge mechanism 300 includes a first hinge piece 310, a second hinge piece 320, and a third hinge piece 330. The first hinge piece 310 and the second hinge piece 320 are both hinged to the vehicle body fixing member 100, and the third hinge piece 330 is hinged to the first hinge piece 310 and the second hinge piece 320.

[0053] The aforementioned hinge mechanism 300 is actually a linkage hinge structure. The lower ends of the first hinge piece 310 and the second hinge piece 320 are both hinged to the vehicle body fixing member 100, while the upper ends of the first hinge piece 310 and the second hinge piece 320 are both hinged to the right end of the third hinge piece 330. Therefore, the third hinge piece 330 can rotate relative to the vehicle body fixing member 100 through the first hinge piece 310 and the second hinge piece 320.

[0054] The third hinge piece 330 has a first hinge point 331 and a second hinge point 332 at one end and a third hinge point 333 at the other end. The first hinge piece 310 and the second hinge piece 320 are hinged to the first hinge point 331 and the second hinge point 332, respectively. The third hinge point 333 is used to hinge with the gas spring 700. The gas spring 700 can apply a pushing force to the third hinge point 333, thereby causing the third hinge piece 330 to rotate.

[0055] The third hinge piece 330 also has a fourth hinge point 334 at one end corresponding to the third hinge point 333 (i.e., the left end of the third hinge piece 330), and the cover plate fixing member 200 is hinged to the fourth hinge point 334. The cover plate fixing member 200 can rotate around the fourth hinge point 334. The left end of the cover plate fixing member 200 is hinged to the left end of the third hinge piece 330 through the fourth hinge point 334, and the right end of the cover plate fixing member 200 corresponds to the right end of the third hinge piece 330. The first hinge piece 310 and the second hinge piece 320 are located at the right end of the third hinge piece 330, so the first hinge piece 310 and the second hinge piece 320 correspond to the right end of the cover plate fixing member 200, thereby enabling the driving element 400 on the first hinge piece 310 to push the right end of the cover plate fixing member 200.

[0056] The cover plate fixing member 200 is hinged to the third hinge piece 330. When the first locking part 510 is separated from the second locking part 610, the cover plate fixing member 200 can rotate relative to the third hinge piece 330 and thus spring up. When the cover plate fixing member 200 springs up, the cover plate fixing member 200 can be pressed against the third hinge piece 330 to return the cover plate fixing member 200 to its original position.

[0057] The limiting piece 600 is fixedly connected to the third hinge piece 330. When the first locking part 510 is connected to the second locking part 610, the cover plate fixing member 200 is fixedly connected to the third hinge piece 330 through the limiting piece 600.

[0058] Since the cover plate fixing member 200 is hinged to the left end of the third hinge piece 330, the cover plate fixing member 200 can spring up relative to the third hinge piece 330; and when the right end of the cover plate fixing member 200 and the third hinge piece 330 are connected to the second locking part 610 through the first locking part 510, the cover plate fixing member 200 and the third hinge piece 330 form two connection points, thereby fixing the cover plate fixing member 200 and the third hinge piece 330 together.

[0059] The first locking part 510 and the second locking part 610 can be locked together or separated. When the cover plate fixing member 200 rotates toward the third hinge piece 330, it can drive the first locking part 510 to lock together with the second locking part 610 again, thereby fixing the cover plate fixing member 200 and the third hinge piece 330 together again and achieving the effect of returning to the original position after pressing.

[0060] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, the driving element 400 is fixedly connected to the first hinge piece 310, and the driving element 400 is provided with a telescopic push rod 410. The push rod 410 is hinged to the rotating push piece 500. When the push rod 410 extends, it pushes the rotating push piece 500 to rotate, thereby separating the first locking part 510 from the second locking part 610.

[0061] The drive element 400 can be configured as a lifter, which is similar to a cylinder. The drive element 400 can drive the push rod 410 to extend or retract. The drive element 400 is fixedly connected to the first hinge piece 310. The drive element 400 on the first hinge piece 310 can push the right end of the rotating push piece 500 to rotate upward. At this time, the lower end of the rotating push piece 500 rotates downward. At this time, the first locking part 510 and the second locking part 610 separate. The right end of the rotating push piece 500 continues to rotate upward, thereby pushing the cover plate fixing member 200 to rotate and spring open.

[0062] It should be added that during the opening process of the active hinge, the extension stroke of the push rod 410 of the drive element 400 is limited, so it has a limiting effect when the cover plate fixing member 200 pops up.

[0063] like Figure 1 , Figure 3 , Figure 5 , Figure 8 As shown, the third hinge piece 330 is provided with a first closing limit block 335 and a first opening limit block 336, the vehicle body fastener 100 is provided with a second closing limit block 111, and the second hinge piece 320 is provided with a second opening limit block 321. When the cover plate fastener 200 is in the closed position, the first closing limit block 335 and the second closing limit block 111 are in contact with each other. When the cover plate fastener 200 is in the open position, the first opening limit block 336 and the second opening limit block 321 are in contact with each other.

[0064] It should be added that a lower stop screw is provided on the first closing limit block 335 for abutting against the second closing limit block 111. A plastic or rubber part is provided on the lower stop screw, which plays a role in buffering and reducing noise when the active hinge closes.

[0065] In addition, the second opening limit block 321 can be set as a curved surface structure. When the active hinge is opened to the limit position, the second opening limit block 321 is in contact with the curved surface structure to achieve the opening limit effect.

[0066] The hinge mechanism 300 further includes a stop 340, which is located between the first hinge piece 310 and the second hinge piece 320, and the stop 340 is fixedly connected to the second hinge piece 320.

[0067] The stop block 340 can limit the distance between the first hinge piece 310 and the second hinge piece 320 when the active hinge is opened. The larger the opening angle of the active hinge, the smaller the distance between the first hinge piece 310 and the second hinge piece 320. The stop block 340, located between the first hinge piece 310 and the second hinge piece 320, can limit the distance and also reduce the noise when opening.

[0068] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0069] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A retractable engine hood active hinge, comprising: The vehicle body fastener and cover plate fastener are characterized in that they further include: A hinge mechanism is provided, wherein the cover plate fixing member is hinged to the vehicle body fixing member via the hinge mechanism, and the cover plate fixing member can spring up relative to the hinge mechanism; A driving element, which is mounted on the hinge mechanism; A rotating push plate is hinged to the cover plate fixing member, the rotating push plate is provided with a first locking part, and the rotating push plate is linked to the driving element; A limiting piece is fixedly connected to the hinge mechanism. The limiting piece is provided with a second locking part. The first locking part is connected to the second locking part to restrict the cover plate fixing member from popping up. The driving element can drive the rotating push plate to rotate, thereby separating the first locking part from the second locking part and pushing the cover plate fixing member to pop up through the rotating push plate. Pressing the cover plate fixing member can push the first locking part and the second locking part to reconnect, thereby returning the cover plate fixing member to its original position. The cover plate fixing component is provided with a tension spring, which is connected to the rotating push plate; The hinge mechanism includes a first hinge piece, a second hinge piece, and a third hinge piece. The first hinge piece and the second hinge piece are both hinged to the vehicle body fixing member. The third hinge piece is hinged to the first hinge piece and the second hinge piece. The cover plate fixing member is hinged to the third hinge piece. The driving element is fixedly connected to the first hinge piece, and the driving element is provided with a telescopic push rod. The push rod is hinged to the rotating push piece, and the limiting piece is fixedly connected to the third hinge piece. When the first locking part is connected to the second locking part, the cover plate fixing member is fixedly connected to the third hinge piece through the limiting piece. When the push rod extends, it pushes the rotating push piece to rotate, thereby separating the first locking part from the second locking part. The rotating push plate includes a first leg and a second leg. The first leg and the second leg are connected to form an inverted V-shaped or L-shaped structure. A hinge part is formed between the first leg and the second leg to be hinged to the cover plate fixing member. The first locking part is disposed on the first leg. The push rod is hinged to the second leg. The first locking part is configured as a hook and the second locking part is configured as a slot, or the first locking part is configured as a slot and the second locking part is configured as a hook; The third hinge piece has a first hinge point and a second hinge point at one end and a third hinge point at the other end. The first hinge piece and the second hinge piece are respectively hinged to the first hinge point and the second hinge point. The third hinge point is used to hinge with the gas spring.

2. The retractable active hinge for an engine hood as described in claim 1, characterized in that: The third hinge piece also has a fourth hinge point at one end corresponding to the third hinge point, and the cover plate fixing member is hinged to the fourth hinge point.

3. The retractable active hinge for an engine hood as described in claim 2, characterized in that: The third hinge piece is provided with a first closing limit block and a first opening limit block, the vehicle body fastener is provided with a second closing limit block, and the second hinge piece is provided with a second opening limit block. When the cover plate fastener is in the closed position, the first closing limit block and the second closing limit block are in contact with each other. When the cover plate fastener is in the open position, the first opening limit block and the second opening limit block are in contact with each other.

4. The retractable active hinge for an engine hood as described in claim 3, characterized in that: The hinge mechanism further includes a stop block located between the first hinge piece and the second hinge piece, and the stop block is fixedly connected to the second hinge piece.

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