Active front hood hinge and pedestrian protection system
By designing an active front hatch hinge with a diagonal spring and locking hook structure, the problem of irreversibility in existing hinges has been solved, achieving reversibility and safety of the hinge, reducing vehicle body damage, and improving the reliability and safety of the hinge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CIXI CITY YALU VEHICLE FITTINGS CO LTD
- Filing Date
- 2023-10-10
- Publication Date
- 2026-06-02
AI Technical Summary
Existing active hinges cannot return to their original position after a vehicle collision, resulting in an irreversible pop-out structure that cannot be reused and may cause secondary damage to the vehicle body.
An active front cabin cover hinge was designed, which adopts a diagonal tension spring and locking hook structure to enable the hinge to actively open before a vehicle collision. The pop-up seat is unlocked under the action of lifting force, and the reversibility is achieved through the cooperation of the locking hook and the locking block. Combined with the restraint structure of the plug block and the clamping block, it ensures that the hinge is locked in the normal state and actively pops up in the event of a collision.
It achieves reversibility and reusability of the hinge, avoids secondary damage to the vehicle body, absorbs kinetic energy through a force-limiting protection device, reduces noise, and improves the reliability and safety of the hinge.
Smart Images
Figure CN117382743B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of automotive parts technology and relates to an active front cabin cover hinge and a pedestrian protection system. Background Technology
[0002] Pedestrian protection performance in automobiles is becoming increasingly important, and pedestrian protection technologies in automobiles are becoming more and more common. Therefore, there is now an active pedestrian protection hood hinge system that can ensure that the hood can be designed to be 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 and reducing the damage value.
[0003] 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. In normal use, the pop-up seat and the cover seat are locked together to maintain relative stillness. When actively popped open, the pop-up seat pops up relative to the cover seat.
[0004] While most existing active hinges can pop open the hood before a vehicle collision, the pop-up mechanism of these active hinges is irreversible; once popped open, the active hinge cannot return to its original position, essentially making it a disposable item. Summary of the Invention
[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing an active front cabin cover hinge and a pedestrian protection system.
[0006] The objective of this invention can be achieved through the following technical solution: an active front cabin canopy hinge, comprising:
[0007] A cover plate seat, the cover plate seat having a locking block;
[0008] A pop-up seat, which is rotatably connected to the cover plate seat;
[0009] A locking piece, which is hinged to the cover plate seat and is rotatable about its hinge point on a plane of rotation, the locking piece having a locking hook;
[0010] A tension spring, one end of which is connected to the locking plate and close to the locking hook, and the other end of which is connected to the spring-loaded seat, the tension spring being inclined to the rotation plane of the locking plate;
[0011] When the hinge does not actively spring open, the locking hook hooks onto the locking block under the action of the inclined spring and is restricted from rotating, and the locking hook pulls the pop-up seat through the inclined spring to restrict the pop-up seat from rotating relative to the cover plate seat;
[0012] When the hinge actively opens, the pop-up seat is subjected to a lifting force and the inclined tension spring applies an inclined tension force to the locking hook. The locking hook deforms and separates from the locking block under the action of the component force of the inclined tension force perpendicular to the plane of rotation. The locking hook rotates and passes over the locking block under the action of the component force of the inclined tension force located on the plane of rotation, so as to allow the pop-up seat to be lifted relative to the cover plate seat.
[0013] Preferably, when the hinge actively springs open and the spring-loaded seat returns to its extreme position, the outer edge of the locking hook abuts against the locking block.
[0014] Preferably, one of the cover plate seat and the pop-up seat has a plug-in block and the other has a clamping block. The clamping block has a clamping hole. The plug-in block is inserted into the clamping hole and the hole wall of the clamping hole hugs the plug-in block to restrict the pop-up seat from rotating relative to the cover plate seat.
[0015] Preferably, the wall of the clamping hole has a protrusion, and the wall of the clamping hole grips the plug block through the protrusion.
[0016] Preferably, it also includes a force-limiting protection device, which includes a stop bar, a protective plate, and a connecting bolt. The pop-up seat has a relief groove. One end of the stop bar is fixedly connected to the cover plate seat and the other end passes through the relief groove. The protective plate is fixedly connected to the pop-up seat by the connecting bolt, and one end of the protective plate is in contact with the stop bar. When the hinge actively pops open, the pop-up seat drives the protective plate to move relative to the stop bar and pushes the protective plate to deform through the stop bar to absorb the explosive force.
[0017] Preferably, the mechanism also includes a fixed bracket, a long hinge rod, and a short hinge rod. One end of the long hinge rod is hinged to the fixed bracket and the other end is hinged to the cover plate seat. One end of the short hinge rod is hinged to the fixed bracket and the other end is hinged to the cover plate seat. The cover plate seat, the fixed bracket, the long hinge rod, and the short hinge rod constitute a four-bar linkage.
[0018] Preferably, the fixed bracket is provided with a closing limiting member, the top of which has a noise reduction pad, and when the hinge is closed, the short hinge rod abuts against the noise reduction pad of the closing limiting member.
[0019] Preferably, the fixed bracket is integrally connected with an opening limiting member, and when the hinge is opened to the limit position, the short hinge rod abuts against the opening limiting member.
[0020] Preferably, the device also includes a lifter, the top of which is connected to the pop-up seat, and the lifter is capable of applying a lifting force to the pop-up seat.
[0021] A pedestrian protection system includes: the active front hatch hinge, a pressure sensor and a sensor diagnostic module, wherein the pressure sensor and the lifter are electrically connected to the sensor diagnostic module, a fixed bracket is fixedly connected to the vehicle, and a pop-up seat is fixedly connected to the front hatch.
[0022] When a pedestrian collides with the front bumper area of the vehicle, the pressure sensor sends a signal to the sensor diagnostic module, which then sends a command to the lifter to apply a lifting force to the pop-up seat. When the pop-up seat pops up, it causes the front hood to pop up actively.
[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0024] 1. This hinge can actively pop open the front hatch cover before a vehicle collision. The pop-up seat can only be unlocked by pulling the locking plate through the diagonal spring when it is subjected to a lifting force. Under normal conditions, the pop-up seat and the cover seat remain locked. Moreover, the pop-up release structure of this hinge is reversible and can be reused.
[0025] 2. Due to the gravity acting on the front hood and the pop-up seat, the pop-up seat will eventually fall back after it actively pops up. The locking block is located on the fall path of the locking hook. When the pop-up seat falls to its limit position, the bottom edge of the locking hook abuts against the locking block, thereby restricting the downward rotation of the locking plate. The locking plate supports the pop-up seat through the inclined tension spring, thus playing the function of limiting the fall. This can prevent the front hood from falling to an excessively low position and avoid secondary damage to the vehicle body.
[0026] 3. The restraint structure of this hinge consists of two main parts. One part is the locking plate and the inclined spring that restrain one area of the pop-up seat; the other part is the plug block and the clamping block that restrain another area of the pop-up seat. This results in the pop-up seat being subjected to two restraint forces, which makes the pop-up seat and the cover plate seat more secure when locked.
[0027] 4. The stop lever is located in the clearance groove. When the pop-up seat actively pops up, the stop lever moves relative to the clearance groove, so the stop lever will not interfere with the pop-up seat. When the pop-up seat actively pops up, it drives the protective plate to actively collide with the stop lever, causing the protective plate to deform and absorb some kinetic energy at the moment the pop-up seat actively pops up.
[0028] 5. Since the front hood is normally closed, the hinge is generally in the closed state where the short hinge rod is in contact with the closing limit piece. The short hinge rod always remains in contact with the noise reduction pad, which absorbs vibration and noise, so that the hinge will not produce abnormal noise when the vehicle body is moving or on bumpy roads. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the active front cabin cover hinge of the present invention.
[0030] Figure 2 This is a schematic diagram of the active front cabin cover hinge of the present invention from one perspective.
[0031] Figure 3 This is a schematic diagram from another perspective of the active front cabin cover hinge of the present invention.
[0032] Figure 4 This is a schematic diagram showing the connection relationship of the tension spring of the present invention.
[0033] Figure 5 This is a schematic diagram showing the positions of the stop bar and the clearance groove of the present invention.
[0034] Figure 6 This is a schematic diagram showing the connection relationship between the plug block and the clamping hole of the present invention.
[0035] Figure 7 This is a schematic diagram of the structure of the closing limiting member of the present invention.
[0036] Figure 8 This is a schematic diagram of the open state of the active front cabin cover hinge of the present invention.
[0037] Figure 9 This is a schematic diagram of the active front cabin cover hinge of the present invention in its active open state.
[0038] Figure 10 This is another schematic diagram showing the active front cabin cover hinge of the present invention in its open state.
[0039] In the diagram, 100 is the cover plate seat; 110 is the locking block; 120 is the plug-in block; 130 is the stop bar; 140 is the opening limit component; 200 is the pop-up seat; 210 is the clamping block; 211 is the clamping hole; 212 is the protrusion; 220 is the protective plate; 230 is the connecting bolt; 240 is the clearance groove; 300 is the locking plate; 310 is the locking hook; 400 is the inclined tension spring; 500 is the fixed bracket; 510 is the long hinge rod; 520 is the short hinge rod; 530 is the closing limit component; 531 is the noise reduction pad; and 600 is the lifting device. Detailed Implementation
[0040] 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.
[0041] like Figure 1-10As shown, an active front cabin cover hinge includes: a cover plate seat 100, a pop-up seat 200, a locking piece 300, and a tension spring 400. The cover plate seat 100 has a locking block 110; the pop-up seat 200 is rotatably connected to the cover plate seat 100; the locking piece 300 is hinged to the cover plate seat 100 and is rotatable about its hinge point on a rotational plane, and the locking piece 300 has a locking hook 310; one end of the tension spring 400 is connected to the locking piece 300 and close to the locking hook 310, and the other end of the tension spring 400 is connected to the pop-up seat 200. The tension spring 400 is inclined to the rotational plane of the locking piece 300. When the hinge is not actively opened... The locking hook 310 hooks onto the locking block 110 under the action of the inclined tension spring 400 and is restricted from rotating. The locking hook 310 also pulls the pop-up seat 200 through the inclined tension spring 400 to restrict the pop-up seat 200 from rotating relative to the cover plate seat 100. When the hinge actively opens, the pop-up seat 200 is subjected to a lifting force and the inclined tension spring 400 applies an inclined pulling force to the locking hook 310. The locking hook 310 deforms and separates from the locking block 110 under the action of the component of the inclined pulling force perpendicular to the plane of rotation. At the same time, the locking hook 310 rotates and passes over the locking block 110 under the action of the component of the inclined pulling force located on the plane of rotation to allow the pop-up seat 200 to be lifted relative to the cover plate seat 100.
[0042] Based on the above embodiments, the active front cabin cover hinge also includes a lifter 600, the top of which is connected to the pop-up seat 200, and the lifter 600 can apply a lifting force to the pop-up seat 200.
[0043] This hinge is used for the connection between the engine compartment cover (hood) and the vehicle body. The hood can be opened or closed by this hinge, and the hinge can also make the hood actively pop up to increase the energy absorption space and reduce the damage value. The pop-up seat 200 is fixedly connected to the hood, and the cover seat 100 is locked together with the pop-up seat 200. So when the hinge is normally open or closed, the cover seat 100 and the pop-up seat 200 move together; when the hinge needs to actively pop up, the pop-up seat 200 moves relative to the cover seat 100.
[0044] The locking block 110 has a protruding structure. When the locking piece 300 is hooked by the locking hook 310, it cannot rotate upward. At this time, the locking piece 300 is in a locked state, and the locking piece 300 pulls the pop-up seat 200 through the inclined tension spring 400, so that the pop-up seat 200 is restrained by force and covers the cover plate seat 100. In this state, the cover plate seat 100 and the pop-up seat 200 remain locked. Since the restraining force formed by the locking hook 310 hooking the locking block 110 is very large, if the locking piece 300 wants to rotate upward, it will definitely be blocked by the locking block 110. This ensures the reliability of the hinge when it is opened and closed normally and prevents the pop-up seat 200 from accidentally disengaging.
[0045] If it is necessary to release the restraint of the pop-up seat 200, the locking state of the locking piece 300 needs to be released. This means that the locking hook 310 needs to be separated from the locking block 110. However, when the locking piece 300 is subjected to the force on the plane of rotation, it is absolutely impossible for it to pass over the locking block 110. Therefore, this embodiment cleverly utilizes the inclined tension spring 400 to release the lock on the locking piece 300. When the pop-up seat 200 is subjected to the lifting force, the inclined tension spring 400 applies an inclined tension force to the locking piece 300. The inclined tension force can actually be decomposed into a component force perpendicular to the plane of rotation and a component force located on the plane of rotation. Therefore, the inclined tension force can pull the locking piece 300 laterally and pull it upward at the same time. At this time, the locking hook 310 can leave the plane of rotation, so that the locking hook 310 is separated from the locking block 110 and the locking piece 300 rotates upward, thereby satisfying the pop-up release requirement of the pop-up seat 200.
[0046] It should be added here that one end of the locking piece 300 is hinged to the cover plate seat 100. The locking piece 300 can bend to the side. When the area near the locking hook 310 is subjected to a diagonal pulling force, the locking piece 300 will produce a recoverable bending deformation and return to its original state after passing the locking block 110. Therefore, the active spring-up of this hinge is reversible. It is only necessary to re-hook the locking hook 310 onto the locking block 110 later; or replace the locking piece 300. There is no need to replace the entire hinge.
[0047] This hinge can actively pop open the front hatch cover before a vehicle collision. The pop-up seat 200 can only be unlocked by pulling the locking plate 300 through the inclined tension spring 400 when it is subjected to a lifting force. Under normal conditions, the pop-up seat 200 and the cover seat 100 remain locked. Moreover, the pop-up release structure of this hinge is reversible and can be reused.
[0048] Based on the above implementation, when the hinge actively springs open and the spring-loaded seat 200 falls back to its limit position, the outer edge of the locking hook 310 abuts against the locking block 110.
[0049] Due to the gravity acting on the front hood and the pop-up seat 200, the pop-up seat 200 will eventually fall back after it actively pops up. The locking block 110 is located on the fall path of the locking hook 310. When the pop-up seat 200 falls to its limit position, the bottom edge of the locking hook 310 abuts against the locking block 110, thereby restricting the downward rotation of the locking piece 300. The locking piece 300 supports the pop-up seat 200 through the inclined tension spring 400, thus playing the function of limiting the fall. This can prevent the front hood from falling to an excessively low position. That is, the locking hook 310 and the locking block 110 abut against each other to achieve the function of limiting the fall after actively popping open, thus avoiding secondary damage to the vehicle body.
[0050] like Figure 1-6 , Figure 9-10 As shown, based on the above embodiment, one of the cover plate seat 100 and the pop-up seat 200 has a plug-in block 120 and the other is provided with a clamping block 210. The clamping block 210 is provided with a clamping hole 211. The plug-in block 120 is inserted into the clamping hole 211 and the hole wall of the clamping hole 211 hugs the plug-in block 120 to restrict the pop-up seat 200 from rotating relative to the cover plate seat 100.
[0051] In the actual structure, the plug-in block 120 is located in the cover plate seat 100, the clamping block 210 is located in the pop-up seat 200, and the clamping hole 211 can clamp or hold the plug-in block 120, so that the pop-up seat 200 is restrained by force.
[0052] It is important to note here that the restraint structure of this hinge consists of two main parts. One part consists of the locking piece 300 and the inclined tension spring 400 restraining one area of the pop-up seat 200; the other part consists of the insertion block 120 and the clamping block 210 restraining another area of the pop-up seat 200. This results in the pop-up seat 200 being subjected to two restraint forces, which makes the pop-up seat 200 and the cover plate seat 100 more secure when locked.
[0053] Based on the above embodiment, the clamping hole 211 has a protrusion 212 on its wall, and the wall of the clamping hole 211 holds the insertion block 120 tightly through the protrusion 212. In the example, the insertion block 120 is slightly larger than the clamping hole 211. When the insertion block 120 is inserted into the clamping hole 211, an interference fit is formed, that is, the clamping hole 211 can hold the insertion block 120 more firmly through the protrusion 212, thereby preventing the pop-up seat 200 from disengaging from the cover plate seat 100.
[0054] like Figure 1 , Figure 2 , Figure 5 , Figure 10As shown, based on the above embodiment, a force-limiting protection device is also included. The force-limiting protection device includes a stop bar 130, a protective plate 220, and a connecting bolt 230. The pop-up seat 200 has a relief groove 240. One end of the stop bar 130 is fixedly connected to the cover plate seat 100 and the other end passes through the relief groove 240. The protective plate 220 is fixedly connected to the pop-up seat 200 through the connecting bolt 230, and one end of the protective plate 220 is in contact with the stop bar 130. When the hinge actively pops open, the pop-up seat 200 drives the protective plate 220 to move relative to the stop bar 130 and pushes the protective plate 220 to deform through the stop bar 130 to absorb the explosive force.
[0055] When the hinge actively springs up, the lifter 600 applies a huge instantaneous explosive force to the spring-up seat 200. Because the instantaneous explosive force is very large, it will damage the hinge structure if there is no corresponding protective device, resulting in hinge damage. Therefore, a force-limiting protection device is specially set to protect the hinge from damage when it actively springs up.
[0056] The stop lever 130 is located in the clearance groove 240. When the pop-up seat 200 actively pops up, the stop lever 130 moves relative to the clearance groove 240, so the pop-up seat 200 will not interfere with the stop lever 130. When the pop-up seat 200 actively pops up, it drives the protective plate 220 to actively collide with the stop lever 130, causing the protective plate 220 to deform and absorb a part of the kinetic energy at the moment the pop-up seat 200 actively pops up.
[0057] In this example, one end of the protective plate 220 is connected to the pop-up seat 200 via a protrusion, and the middle part of the protective plate 220 is connected to the pop-up seat 200 via a connecting bolt 230, thereby fixing the protective plate 220 to the pop-up seat 200. The other end of the protective plate 220 is in contact with or close to the stop bar 130. When a vehicle collides with a pedestrian, the connecting bolt 230 can be removed and a new protective plate 220 can be replaced at a 4S shop, which is convenient for maintenance, low in cost, and easy to carry.
[0058] like Figure 1-6 , Figure 8-10 As shown, based on the above embodiment, it further includes a fixed bracket 500, a long hinge rod 510, and a short hinge rod 520. One end of the long hinge rod 510 is hinged to the fixed bracket 500 and the other end is hinged to the cover plate seat 100. One end of the short hinge rod 520 is hinged to the fixed bracket 500 and the other end is hinged to the cover plate seat 100. The cover plate seat 100, the fixed bracket 500, the long hinge rod 510, and the short hinge rod 520 constitute a four-bar linkage. The cover plate seat 100 is opened or closed via the four-bar linkage.
[0059] Based on the above embodiments, the fixed bracket 500 is provided with a closing limiting member 530, the top end of the closing limiting member 530 has a noise reduction pad 531, and when the hinge is closed, the short hinge rod 520 abuts against the noise reduction pad 531 of the closing limiting member 530.
[0060] Based on the above implementation method, the fixed bracket 500 is integrally connected with the opening limiting member 140, and when the hinge is opened to the limit position, the short hinge rod 520 abuts against the opening limiting member 140.
[0061] The active hinge has design requirements for opening and closing limits. When the hinge is normally open, the pop-up seat 200 and the cover seat 100 remain relatively stationary and move relative to the fixed bracket 500. When the hinge is opened to the limit position, the short hinge rod 520 abuts against the opening limit member 140; when the hinge is closed to the limit position, the short hinge rod 520 abuts against the closing limit member 530.
[0062] It should be noted that the top of the closing limiter 530 has a noise reduction pad 531 (made of rubber or silicone or other materials) to reduce noise. Since the front hood is normally closed, that is, the hinge is generally in the closed state where the short hinge rod 520 is in contact with the closing limiter 530. The short hinge rod 520 always remains in contact with the noise reduction pad 531. The noise reduction pad 531 absorbs vibration and noise, so that the hinge will not produce abnormal noise when the whole vehicle is moving and on bumpy roads.
[0063] like Figure 1-10 As shown, based on the above embodiments, a pedestrian protection system includes: the active front hatch hinge, a pressure sensor, and a sensor diagnostic module. The pressure sensor and the lifter 600 are both electrically connected to the sensor diagnostic module. The fixed bracket 500 is fixedly connected to the vehicle, and the pop-up seat 200 is fixedly connected to the front hatch. When a pedestrian collides with the front bumper area of the vehicle, the pressure sensor sends a signal to the sensor diagnostic module, and the sensor diagnostic module sends a command to the lifter 600 to apply a lifting force to the pop-up seat 200. When the pop-up seat 200 pops up, it causes the front hatch to actively pop up.
[0064] This pedestrian protection system is a vehicle-mounted system, particularly applied to the front hood of a vehicle. When a collision occurs between the vehicle and a pedestrian, a pressure sensor on the front bumper senses the impact pressure and sends a command to the lifter 600. The tension spring 400 pulls the locking plate 300 upward, causing the locking hook 310 to pass over the locking block 110. Simultaneously, the insertion block 120 separates from the clamping block 210. After the restraints in these two areas are released, the pop-up seat 200 rotates upward relative to the cover seat 100 and pops up, thereby causing the front hood to pop up to increase the energy absorption space and reduce the injury value.
[0065] It should be noted that all directional indications (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 each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0066] Furthermore, in this invention, descriptions involving "first," "second," "a," etc., 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.
[0067] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; 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 between two elements, unless otherwise explicitly limited.
[0068] 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. An active front cabin canopy hinge, characterized in that, include: A cover plate seat (100) having a locking block (110); A pop-up seat (200) is rotatably connected to the cover plate seat (100); A locking piece (300) is hinged to the cover plate seat (100) and is rotatable about its hinge point on a plane of rotation. The locking piece (300) has a locking hook (310). A tension spring (400) is provided, one end of which is connected to the locking piece (300) and close to the locking hook (310), and the other end of which is connected to the spring-loaded seat (200). The tension spring (400) is inclined to the rotation plane of the locking piece (300). When the hinge does not actively spring open, the locking hook (310) hooks the locking block (110) under the action of the inclined tension spring (400) and is restricted from rotating. The locking hook (310) pulls the pop-up seat (200) through the inclined tension spring (400) to restrict the pop-up seat (200) from rotating relative to the cover plate seat (100). When the hinge actively opens, the pop-up seat (200) is subjected to a lifting force and the inclined tension spring (400) applies an inclined tension force to the locking hook (310). The locking hook (310) deforms under the action of the component of the inclined tension force perpendicular to the plane of rotation and separates from the locking block (110). The locking hook (310) rotates under the action of the component of the inclined tension force located on the plane of rotation and passes over the locking block (110) to allow the pop-up seat (200) to be lifted relative to the cover plate seat (100).
2. The active front cabin cover hinge as described in claim 1, characterized in that: When the hinge actively springs open and the spring-loaded seat (200) falls back to its limit position, the outer edge of the locking hook (310) abuts against the locking block (110).
3. The active front cabin cover hinge as described in claim 1, characterized in that: One of the cover plate seat (100) and the pop-up seat (200) has a plug-in block (120) and the other has a clamping block (210). The clamping block (210) has a clamping hole (211). The plug-in block (120) is inserted into the clamping hole (211) and the wall of the clamping hole (211) grips the plug-in block (120) to restrict the pop-up seat (200) from rotating relative to the cover plate seat (100).
4. An active front cabin cover hinge as described in claim 3, characterized in that: The clamping hole (211) has a protrusion (212) on its wall, and the wall of the clamping hole (211) holds the plug block (120) tightly through the protrusion (212).
5. An active front cabin cover hinge as described in claim 1, characterized in that: It also includes a force limiting protection device, which includes a stop bar (130), a protective plate (220), and a connecting bolt (230). The pop-up seat (200) has a relief groove (240). One end of the stop bar (130) is fixedly connected to the cover plate seat (100), and the other end passes through the relief groove (240). The protective plate (220) is fixedly connected to the pop-up seat (200) through the connecting bolt (230), and one end of the protective plate (220) is in contact with the stop bar (130). When the hinge actively pops open, the pop-up seat (200) drives the protective plate (220) to move relative to the stop bar (130), and the stop bar (130) pushes the protective plate (220) to deform in order to absorb the explosive force.
6. An active front cabin cover hinge as described in claim 5, characterized in that: It also includes a fixed bracket (500), a long hinge rod (510), and a short hinge rod (520). One end of the long hinge rod (510) is hinged to the fixed bracket (500) and the other end is hinged to the cover plate seat (100). One end of the short hinge rod (520) is hinged to the fixed bracket (500) and the other end is hinged to the cover plate seat (100). The cover plate seat (100), the fixed bracket (500), the long hinge rod (510), and the short hinge rod (520) constitute a four-bar linkage.
7. An active front cabin cover hinge as described in claim 6, characterized in that: The fixed bracket (500) is provided with a closing limit member (530), and the top end of the closing limit member (530) has a noise reduction pad (531). When the hinge is closed, the short hinge rod (520) abuts against the noise reduction pad (531) of the closing limit member (530).
8. An active front cabin cover hinge as described in claim 6, characterized in that: The fixed bracket (500) is integrally connected with an opening limit member (140). When the hinge is opened to the limit position, the short hinge rod (520) abuts against the opening limit member (140).
9. An active front cabin cover hinge as described in claim 1, characterized in that: It also includes a lifter (600), the top of which is connected to the pop-up seat (200), and the lifter (600) can apply a lifting force to the pop-up seat (200).
10. A pedestrian protection system, characterized in that, include: The active front cabin cover hinge as described in any one of claims 1-9 further includes a pressure sensor and a sensor diagnostic module, wherein the pressure sensor and the lifter (600) are electrically connected to the sensor diagnostic module, the fixed bracket (500) is fixedly connected to the vehicle, and the pop-up seat (200) is fixedly connected to the front cabin cover. When a pedestrian collides with the front bumper area of the vehicle, the pressure sensor sends a signal to the sensor diagnostic module, which then sends a command to the lifter (600) to apply a lifting force to the pop-up seat (200). When the pop-up seat (200) pops up, it causes the front hatch cover to pop up actively.