A locking retention mechanism for a car pedestrian protection hinge

Abstract

The utility model relates to the technical field of automobile pedestrian protection hinge, specifically relates to a locking and holding mechanism for automobile pedestrian protection hinge, the first connecting rod of the design is fixed through connecting rod pin shaft, the ratchet pawl bolt and torsional spring bolt set up on it are respectively used as the rotation center and the bearing point of ratchet pawl body and torsional spring body, under the untriggered state, the torsional spring body torque is small, and the ratchet pawl body is in light contact with the second connecting rod, after detonation, along with the relative rotation of the first connecting rod and the second connecting rod, the torsional spring body is compressed, the torque increases, and the ratchet pawl body is pushed into the locking end of the second connecting rod to form locking, effectively inhibiting the downward rebound of the hood, the design reduces the resistance in the lifting process, makes the hood reach the maximum height in shorter time, improves the pedestrian protection effect, reduces the requirement for the energy of the blasting device, and reduces the cost and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of automotive pedestrian protection hinge technology, and in particular to a locking and retaining mechanism for automotive pedestrian protection hinges. Background Technology

[0002] Currently, existing pedestrian protection hinges play a crucial role in automotive safety. When a vehicle collides with a pedestrian, the detonation of the hood can quickly raise it to a certain height, providing additional buffer space for the pedestrian and effectively reducing injuries to critical areas such as the head. Some existing pedestrian protection hinges are equipped with locking mechanisms that can stabilize the hood at the required height within milliseconds after the hood detonates, preventing it from rebounding downwards after reaching its highest point. This ensures the stable implementation of pedestrian protection functions to a certain extent, improves the vehicle's ability to protect pedestrians, and reduces the severity of pedestrian injuries in traffic accidents.

[0003] However, a significant issue is that after the detonator is activated, the locking mechanism exerts considerable resistance to the upward lifting of the detonator cover. This prevents the cover from reaching its maximum height in a shorter time, prolonging the time it takes to reach the effective protection position and weakening the pedestrian protection effect to some extent. Furthermore, the greater resistance places higher energy demands on the detonator, increasing cost and energy consumption. This problem arises from the suboptimal design of the locking mechanism, where the interaction of various components during detonation leads to excessive obstruction of the cover's lifting process. Utility Model Content

[0004] The purpose of this invention is to provide a locking and retaining mechanism for a pedestrian protection hinge for automobiles, aiming to solve the problem that in the prior art, after the detonator is detonated, the locking mechanism provides significant resistance to the upward lifting of the detonator cover. This prevents the detonator cover from reaching its maximum height in a shorter time, prolonging the time it takes for the cover to reach the effective protection position and weakening the pedestrian protection effect to some extent. At the same time, the greater resistance places higher energy requirements on the detonator, increasing cost and energy consumption. The reason for this problem is that the design of the locking mechanism is not optimized enough, and the interaction of various components during the detonation process leads to excessive obstruction of the detonator cover's lifting process.

[0005] To achieve the above objectives, this utility model employs a locking and retaining mechanism for a pedestrian protection hinge in a vehicle, comprising a first link, a pawl body, a torsion spring body, and a second link. A first fixing member is provided at one end of the first link, a second fixing member is provided in the middle of the first link, and a third fixing member is provided at the other end of the first link. A torsion spring stop bar is provided on the pawl body. The first link is rotatably mounted on the first fixing member. Both the pawl body and the torsion spring body are rotatably mounted on the second fixing member. One end of the torsion spring body abuts against the torsion spring stop bar, the other end of the torsion spring body abuts against the third fixing member, and the pawl body abuts against the second link.

[0006] The first fixing component is a connecting rod pin, which is fixedly connected to the first connecting rod and located at one end of the first connecting rod.

[0007] The second fixing component is a pawl pin, which is fixedly connected to the first connecting rod and located in the middle of the first connecting rod.

[0008] The third fixing component is a torsion spring pin, which is fixedly connected to the first connecting rod and located at the other end of the first connecting rod, and the other end of the torsion spring body abuts against the torsion spring pin.

[0009] The second link has an unlocked end, a critical end, and a locked end.

[0010] This invention discloses a locking and retaining mechanism for a pedestrian protection hinge in a vehicle. The first connecting rod is fixed by a connecting rod pin, with a pawl pin and a torsion spring pin serving as the rotation center and abutment point of the pawl body and the torsion spring body, respectively. In the untriggered state, the torsion spring body has low torque, and the pawl body makes light contact with the second connecting rod. After detonation, as the first and second connecting rods rotate relative to each other, the torsion spring body compresses, increasing torque and pushing the pawl body into the locking end of the second connecting rod to lock, effectively suppressing the downward rebound of the detonator. This design reduces resistance during the lifting process, allowing the detonator to reach its maximum height in a shorter time, improving pedestrian protection, while also reducing the energy requirements of the detonator, thus reducing cost and energy consumption. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a split diagram of the locking and retaining mechanism of the pedestrian protection hinge for automobiles according to this utility model.

[0013] Figure 2 This is a schematic diagram of the locking and retaining mechanism of the automobile pedestrian protection hinge of this utility model when it is not triggered.

[0014] Figure 3 This is a schematic diagram of the locking and retaining mechanism of the automobile pedestrian protection hinge of this utility model when it is in a critical state.

[0015] Figure 4 This is a schematic diagram of the locking and retaining mechanism of the automobile pedestrian protection hinge of this utility model when it is triggered.

[0016] 1-First link, 2-Pawl body, 3-Torsion spring body, 4-Second link, 5-Torsion spring stop bar, 6-Link pin, 7-Pawl pin, 8-Torsion spring pin, 9-Unlocked end, 10-Critical end, 11-Locked end. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] Please see Figures 1 to 4 This utility model provides a locking and retaining mechanism for a pedestrian protection hinge for automobiles, including a first link 1, a pawl body 2, a torsion spring body 3, and a second link 4. One end of the first link 1 is provided with a first fixing member, the middle of the first link 1 is provided with a second fixing member, and the other end of the first link 1 is provided with a third fixing member. The pawl body 2 is provided with a torsion spring stop bar 5. The first link 1 is rotatably mounted on the first fixing member. The pawl body 2 and the torsion spring body 3 are both rotatably mounted on the second fixing member. One end of the torsion spring body 3 abuts against the torsion spring stop bar 5, the other end of the torsion spring body 3 abuts against the third fixing member, and the pawl body 2 abuts against the second link 4.

[0019] In this embodiment, through the synergistic effect of the various components, the resistance of the locking mechanism to the lifting process of the detonator after detonation is significantly reduced. The torsion spring stop bar 5 can be integrated into the pawl body 2. The first connecting rod 1 serves as a basic support component. Through the dynamic cooperation between the pawl body 2 and the second connecting rod 4, combined with the elastic control of the torsion spring body 3, the detonator can be quickly stabilized to a specified height within milliseconds, effectively improving the pedestrian protection effect. At the same time, it reduces the energy requirement of the detonator, thereby reducing costs and energy consumption.

[0020] Furthermore, the first fixing member is a connecting rod pin 6, which is fixedly connected to the first connecting rod 1 and located at one end of the first connecting rod 1.

[0021] In this embodiment, the connecting rod pin 6 serves as the fixing and rotation center of the first connecting rod 1, ensuring the stability and rotational accuracy of the structure. Its design enables the first connecting rod 1 to maintain a stable trajectory when it rotates relative to the second connecting rod 4 after the detonator is activated, avoiding additional resistance caused by loose or misaligned components, thereby ensuring the smoothness and efficiency of the shell lifting process.

[0022] Furthermore, the second fixing member is a pawl pin 7, which is fixedly connected to the first connecting rod 1 and located in the middle of the first connecting rod 1.

[0023] In this embodiment, using the pawl pin 7 as the rotation center of the pawl body 2 not only simplifies the structural complexity but also improves the pawl's response speed and locking accuracy. After the detonator is activated, the pawl body 2 can quickly and accurately rotate around the pawl pin 7, entering the recessed area of ​​the second connecting rod 4 to form a lock, effectively suppressing the downward rebound of the hood and ensuring the immediacy and reliability of the pedestrian protection function.

[0024] Furthermore, the third fixing member is a torsion spring pin 8, which is fixedly connected to the first connecting rod 1 and located at the other end of the first connecting rod 1, and the other end of the torsion spring body 3 abuts against the torsion spring pin 8.

[0025] In this embodiment, the torsion spring pin 8 can be integrated into the first connecting rod 1. Through the design of the torsion spring pin 8, the compression range and torque output of the torsion spring body 3 are precisely controlled. During the detonation process of the blaster, the torsion spring body 3 achieves a gradual increase and stable release of torque through the action of the torsion spring pin 8. This ensures that the pawl body 2 effectively locks the second connecting rod 4, and avoids component damage or energy waste caused by excessive torque, further improving the durability and economy of the mechanism.

[0026] Furthermore, the second link 4 has an unlocked end 9, a critical end 10, and a locked end 11.

[0027] In this embodiment, during the initial detonation of the explosive, the pawl body 2 contacts the unlocked end 9 of the second connecting rod 4, resulting in low resistance and facilitating rapid lifting of the explosive cover. As the rotation angle increases, upon entering the critical end 10, the torque of the torsion spring body 3 reaches its extreme value, preparing for locking. Finally, upon entering the locking end 11, the pawl body 2, pushed by the torsion spring body 3, enters the locking end 11, forming a stable locking effect. This design ensures that the explosive cover remains stably stopped at the designated height within milliseconds, achieving optimal pedestrian protection.

[0028] In this invention, after the blaster detonates, the first connecting rod 1 rotates around the connecting rod pin 6, simultaneously driving the pawl body 2 to rotate around the pawl pin 7. At this time, the torsion spring body 3 provides elastic torque through the torsion spring pin 8. As the first connecting rod 1 and the second connecting rod 4 rotate relative to each other, the pawl body 2 gradually approaches and eventually enters the locking end 11 of the second connecting rod 4. During this process, the torque of the torsion spring body 3 gradually increases to its extreme value and pushes the pawl body 2 to form a stable lock, effectively suppressing the downward rebound of the hood after reaching the highest point, ensuring that the hood stops stably at the specified height within milliseconds, thereby achieving a highly efficient pedestrian protection function.

[0029] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A locking and retaining mechanism for a pedestrian protection hinge in a vehicle, characterized in that, The device includes a first connecting rod, a pawl body, a torsion spring body, and a second connecting rod. One end of the first connecting rod is provided with a first fixing member, the middle of the first connecting rod is provided with a second fixing member, and the other end of the first connecting rod is provided with a third fixing member. The pawl body is provided with a torsion spring stop bar. The first connecting rod is rotatably mounted on the first fixing member. The pawl body and the torsion spring body are both rotatably mounted on the second fixing member. One end of the torsion spring body abuts against the torsion spring stop bar, the other end of the torsion spring body abuts against the third fixing member, and the pawl body abuts against the second connecting rod.

2. The locking and retaining mechanism for a pedestrian protection hinge for automobiles as described in claim 1, characterized in that, The first fixing component is a connecting rod pin, which is fixedly connected to the first connecting rod and located at one end of the first connecting rod.

3. The locking and retaining mechanism for a pedestrian protection hinge for automobiles as described in claim 2, characterized in that, The second fixing component is a pawl pin, which is fixedly connected to the first connecting rod and located in the middle of the first connecting rod.

4. The locking and retaining mechanism for a pedestrian protection hinge for automobiles as described in claim 3, characterized in that, The third fixing component is a torsion spring pin, which is fixedly connected to the first connecting rod and located at the other end of the first connecting rod, and the other end of the torsion spring body abuts against the torsion spring pin.

5. The locking and retaining mechanism for a pedestrian protection hinge for automobiles as described in claim 4, characterized in that, The second link has an unlocked end, a critical end, and a locked end.

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