Active air-inlet grille capable of realizing self-locking of blades

Abstract

The utility model belongs to the technical field of air-inlet grilles, and relates to an active air-inlet grille capable of realizing self-locking of blades, which comprises the blades, a connecting rod mechanism and a self-locking mechanism consisting of a plurality of groups of connecting rods. The grid blades are self-locked in the skin through a dead point mechanism formed by rotation of two sets of connecting rods in the self-locking mechanism, the self-locking function of the grid blades can be achieved without the need that the motor is in a continuous working state, meanwhile, the grid blades are driven to act through the multiple sets of connecting rods, and state switching between a complete opening state and a complete closing state is achieved. Compared with the prior art, the active air-inlet grille provided by the utility model has the advantages that the whole vehicle domain control is not influenced, an additional motor is not needed, the system development cost is reduced, and the reliability of the mechanism is improved.

Description

Technical Field

[0001] This utility model belongs to the field of air intake grille technology, and in particular relates to an active air intake grille that can achieve blade self-locking. Background Technology

[0002] Against the backdrop of "energy conservation and emission reduction," the automotive industry has responded to this call by improving fuel blending, lightweight vehicle design, and enhancing fuel economy. Among these measures, the design and application of active grille shutters have shown significant effectiveness in improving fuel economy. An active grille shutter is a type of grille that actively and automatically adjusts its opening angle based on the needs of the engine compartment, including vehicle speed, engine temperature, and ambient temperature. This allows it to increase or decrease airflow through the grille, accelerating engine compartment cooling, promoting rapid engine warm-up, and adjusting vehicle drag, thus optimizing overall vehicle aerodynamics and reducing fuel consumption, ultimately improving fuel economy.

[0003] With the increasing popularity of active grille shutters, the size of the grille blades is becoming larger and the opening methods more diverse in pursuit of unique styling during the development of new models. The sliding opening method can be achieved through a linkage mechanism, in which the drive shaft is generally positioned above or below the blades. However, this offset arrangement suffers from a problem: the self-locking torque of the motor when powered off is relatively small (the self-locking torque of a brushless motor is generally less than 1 N·m), leading to the blades being easily pushed open, resulting in a poor user experience. Furthermore, if the motor malfunctions or is damaged, the blades will also be pushed open, affecting user operation. While blade locking can be addressed by adding a locking motor, this involves the sequential action of the two motors in the vehicle's domain control, affecting the overall layout; additionally, adding a locking motor increases system development costs. Therefore, there is an urgent need for an active grille shutter that can achieve blade self-locking.

[0004] Patent publication number CN117818342A discloses a self-locking large-blade external active air intake grille. A first and second linkage group drive the small and large blades to rotate relative to each other, adjusting the airflow. When the small and large blades are closed, the first and second linkage groups form an angle and support the backs of the blades, giving them a self-locking force. The small blades abut against the backs of the large blades, enhancing the large blades' wind resistance and allowing for a larger frontal surface. Compared to traditional external active air intake grilles that rely solely on a motor for self-locking, this patent application allows the small and large blades to maintain self-locking force even without a motor, preventing blade structure failure. However, the pulley and rail structure used in this patent application increases the complexity of the entire system, requiring more components and finer adjustments to ensure synchronized and precise movement. Furthermore, due to the complex structure, more frequent maintenance and inspection are needed to ensure the cleanliness and lubrication of the pulleys and rails, preventing wear and jamming. Patent CN212313273U discloses a self-locking variable intake grille structure. Through a worm gear mechanism, the grille blades achieve self-locking between fully open and fully closed positions, without requiring a continuously operating motor. This self-locking function can replace a stepper motor with a conventional motor, resulting in lower cost and higher reliability. Furthermore, the worm gear mechanism drives the grille blades, achieving the switching between fully open and fully closed states without additional energy consumption, ensuring safety and reliability. However, this patent uses a worm gear mechanism, which is more complex than a simple linkage mechanism, thus increasing manufacturing costs, especially in precision machining and material selection. Secondly, the worm gear mechanism requires more space for installation, potentially limiting its use in space-constrained applications. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an active air intake grille that can achieve blade self-locking. This active air intake grille uses multiple sets of linkages to achieve blade self-locking, which does not affect the overall vehicle domain control and does not require the addition of an extra motor, thereby reducing the cost of system development and improving the reliability of the mechanism.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] This invention provides an active air intake grille with self-locking blades, comprising blades and a linkage mechanism, and a self-locking mechanism including a drive rod and a linkage assembly.

[0008] One end of the connecting rod assembly is mounted on the connecting rod mechanism, and the other end is connected to the drive rod. The drive rod drives the connecting rod assembly to rotate the connecting rod mechanism. When the connecting rod assembly rotates to form a dead point mechanism, the blade self-locks.

[0009] Furthermore, the movement trajectory of the blade is enveloped and controlled by a linkage mechanism, and after the blade self-locks, it matches the skin.

[0010] Furthermore, the linkage mechanism includes staggered driving links and driven links.

[0011] Furthermore, both the driving rod and the driven rod are configured as U-shaped rods, with one end of the U-shaped rod fixed to the back of the blade and the other end fixed to the vehicle frame.

[0012] Furthermore, the linkage assembly includes: a first link, a second link, a third link, and a fourth link.

[0013] The three links are connected end to end in sequence, and the other link is connected to any connection point of the other three links.

[0014] Furthermore, the second and third links constitute any one of an integral U-shaped rod, an integral V-shaped rod, or a triangular plate.

[0015] Furthermore, the linkage assembly includes a first link, a second link, a third link, and a fourth link connected end-to-end in sequence.

[0016] One end of the first connecting rod is connected to the active rod, and the connection point E is located on one side of the U-shaped rod of the active rod;

[0017] The connection point G' between the second link and the third link is fixed to the vehicle frame;

[0018] The fourth link is connected to the third link at one end and to the drive rod at the other end.

[0019] The drive rod drives the fourth link to rotate the other links. When the connection point F between the first link and the second link, and the connection points G' and E are on a straight line, a dead point mechanism is formed, and the blades are self-locked inside the skin.

[0020] Furthermore, one end of the drive rod is connected to the fourth connecting rod, and the other end is connected to the motor. The connection point B' between the drive rod and the motor and the connection point B between the drive rod and the output shaft are coaxial.

[0021] The drive rod rotates around connection point B', driving the fourth link to rotate other links. When the connection points F, G', and E are no longer on the same straight line, the dead point mechanism is decoupled, and the blade moves normally.

[0022] Furthermore, the linkage assembly includes a first link, a second link, and a third link connected end-to-end, and also includes a fourth link.

[0023] One end of the fourth link is located at the connection point M between the second and third links, and the other end is connected to the drive rod;

[0024] One end of the first connecting rod is connected to the active rod, and the connection point J is located on one side of the U-shaped rod of the active rod;

[0025] One end of the third link is fixed to the vehicle frame;

[0026] One end of the drive rod is connected to the motor, and the connection point P between the drive rod and the motor and the connection point B between the drive rod and the output shaft are coaxial.

[0027] The drive rod drives the fourth link to rotate the other links. When the connection point O between the drive rod and the fourth link, and the connection points P and M are on a straight line, a dead point mechanism is formed, and the blades are self-locked inside the skin.

[0028] Furthermore, the drive rod rotates around the connection point P, driving the fourth link to rotate other links. When the connection points P, O, and M are not on the same straight line, the dead point mechanism is decoupled, and the blade moves normally.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] (1) This utility model provides an active air intake grille with self-locking blades. The active air intake grille uses multiple sets of linkages to achieve blade self-locking, which does not affect the overall vehicle domain control and does not require the addition of an extra motor, thereby reducing the system development cost and improving the reliability of the mechanism. Compared with the previous large-blade external active air intake grille that relies solely on the motor for self-locking, the blades of this utility model can still achieve blade self-locking even when the motor's self-locking torque is small after power is off, thus preventing the blades from being pushed open.

[0031] (2) This utility model provides an active air intake grille that can realize blade self-locking. The blade has no fixed shaft and the blade self-locking is achieved by multiple sets of connecting rods. By rotating two sets of connecting rods to form a straight line, a dead point mechanism is formed, so that the grille blades self-lock on the skin. The self-locking function of the grille blades can be achieved without the motor being in a continuous working state. It has low cost and high reliability. At the same time, the grille blades can be driven to move by multiple sets of connecting rods to realize the state switching between fully open and fully closed without additional energy consumption, which is safe and reliable. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the active air intake grille of this utility model in its fully closed state.

[0033] Figure 2 This is a schematic diagram of the assembly of the active air intake grille of this utility model in its fully closed state.

[0034] Figure 3 This is a schematic diagram of the assembly of the active air intake grille of this utility model in its fully open state.

[0035] Figure 4 This is a schematic diagram of the assembly of the active air intake grille of this utility model in the fully closed state.

[0036] Figure 5 This is a schematic diagram of the assembly of the active air intake grille of this utility model in its fully open state.

[0037] Explanation of markings in the diagram:

[0038] 1-Car body frame, 2-Linkage mechanism, 3-Self-locking mechanism, 4-Blade, 5-Skin, 201-Driving rod, 202-Driven rod, 301-First connecting rod, 302-Second connecting rod, 303-Third connecting rod, 304-Fourth connecting rod, 305-Drive rod, A-Connection point between driving rod and blade, B'-Connection point between drive rod and motor in embodiment 1 of this utility model, B-Connection point between driving rod and output shaft, C-Connection point between driven rod and blade, D-Connection point between driven rod and car body frame, E-Connection point between first connecting rod and driving rod in embodiment 1 of this utility model, F-Connection point between first connecting rod and second connecting rod in embodiment 1 of this utility model, G'-Connection point between driving rod and motor in embodiment 1 of this utility model, In Embodiment 1, the connection point between the second and third links is also connected to the vehicle frame. G - Connection point between the third and fourth links in Embodiment 1 of this utility model. H - Connection point between the fourth link and the drive rod in Embodiment 1 of this utility model. J - Connection point between the first link and the drive rod in Embodiment 2 of this utility model. K - Connection point between the first and second links in Embodiment 2 of this utility model. M - Connection point between the second and third links in Embodiment 2 of this utility model. N - Connection point between the third link and the vehicle frame in Embodiment 2 of this utility model. O - Connection point between the fourth link and the drive rod in Embodiment 2 of this utility model. P - Connection point between the drive rod and the motor in Embodiment 2 of this utility model. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0043] Example 1

[0044] This embodiment provides an active air intake grille that enables blade self-locking, such as... Figure 1 , Figure 2 , Figure 3 As shown, it includes blade 4 and linkage mechanism 2, and also includes self-locking mechanism 3. The self-locking mechanism 3 includes drive rod 305 and linkage assembly. One end of the linkage assembly is set on linkage mechanism 2, and the other end is connected to drive rod 305. Drive rod 305 drives linkage assembly to drive linkage mechanism 2 to rotate. When linkage assembly rotates to form dead point mechanism, blade 4 self-locks.

[0045] In this embodiment, please refer again. Figure 2 , Figure 3 As shown, the motion trajectory of blade 4 is enveloped and controlled by linkage mechanism 2. After blade 4 self-locks, it matches with skin 5.

[0046] In this embodiment, please refer again. Figure 2 , Figure 3 As shown, the linkage mechanism 2 includes staggered driving rods 201 and driven rods 202.

[0047] In this embodiment, please refer again. Figure 2 , Figure 3As shown, both the active rod 201 and the driven rod 202 are configured as U-shaped rods, with one end of the U-shaped rod fixed to the back of the blade 4 and the other end fixed to the vehicle frame 1.

[0048] In this embodiment, please refer again. Figure 2 , Figure 3 As shown, the linkage assembly includes a first link 301, a second link 302, a third link 303, and a fourth link 304 connected end to end in sequence. One end of the first link 301 is connected to the drive link 201, and the connection point E is located on one side of the U-shaped rod of the drive link 201. The connection point G' between the second link 302 and the third link 303 is fixed to the vehicle frame 1. One end of the fourth link 304 is connected to the third link 303, and the other end is connected to the drive rod 305. The drive rod 305 drives the fourth link 304 to rotate the other links. When the connection point F between the first link 301 and the second link 302, and the connection points G' and E are on a straight line, a dead point mechanism is formed, and the blade 4 is self-locked inside the skin 5. Figure 2 ).

[0049] In this embodiment, please refer again. Figure 2 , Figure 3 As shown, one end of the drive rod 305 is connected to the fourth link 304, and the other end is connected to the motor. The connection point B' between the drive rod 305 and the motor and the connection point B between the drive rod 201 and the output shaft are coaxial. The drive rod 305 rotates around the connection point B', driving the fourth link 304 to rotate the other links. When the connection points F, G', and E are no longer on the same straight line, the dead-point mechanism is decoupled, and the blade 4 moves normally. Figure 3 ).

[0050] In this embodiment, please refer again. Figure 2 , Figure 3 As shown, the second link 302 and the third link 303 form an integral U-shaped rod.

[0051] The working process of the active air intake grille in this embodiment is as follows:

[0052] like Figure 1 , Figure 2 , Figure 3 As shown, blade 4 is a large-sized blade and an external blade, which matches the skin 5. Blade 4 opens by translation and retraction. Behind blade 4 are two staggered connecting rods: active rod 201 and driven rod 202, which are used to control the movement trajectory of the blade. To avoid the motion envelope of blade 4, active rod 201 and driven rod 202 are designed as U-shaped rods.

[0053] To achieve the self-locking function of the blades, a self-locking mechanism 3 is added. This self-locking mechanism 3 includes a drive rod 305 and a connecting rod assembly. The connecting rod assembly includes a first connecting rod 301, a second connecting rod 302, a third connecting rod 303, and a fourth connecting rod 304 connected end to end in sequence. One end of the first connecting rod 301 is connected to the drive rod 201, and the connection point E is located on one side of the U-shaped rod of the drive rod 201. The second connecting rod 302 and the third connecting rod 303 are set as an integral U-shaped rod, and the connection point G' of the second connecting rod 302 and the third connecting rod 303 is fixed to the vehicle frame 1 through a hole-shaft structure. One end of the fourth connecting rod 304 is connected to the third connecting rod 303, and the other end is connected to the drive rod 305. One end of the drive rod 305 is connected to the fourth connecting rod 304, and the other end is connected to the motor. The connection point B' between the drive rod 305 and the motor and the connection point B between the drive rod 201 and the output shaft are coaxial. Drive rod 305 drives fourth link 304 to rotate other links. When the connection point F between the first link 301 and the second link 302, and connection points G' and E are on a straight line, a dead-point mechanism is formed, and the blade 4 self-locks within the skin 5. Figure 2 The drive rod 305 rotates around connection point B', driving the fourth link 304 to rotate the other links. When the connection points F, G', and E are no longer on the same straight line, the dead-point mechanism is decoupled, and the blade 4 moves normally. Figure 3 ).

[0054] Example 2

[0055] This embodiment provides an active air intake grille that enables blade self-locking, such as... Figure 1 , Figure 4 , Figure 5 As shown, it includes blade 4 and linkage mechanism 2, and also includes self-locking mechanism 3. The self-locking mechanism 3 includes drive rod 305 and linkage assembly. One end of the linkage assembly is set on linkage mechanism 2, and the other end is connected to drive rod 305. Drive rod 305 drives linkage assembly to drive linkage mechanism 2 to rotate. When linkage assembly rotates to form dead point mechanism, blade 4 self-locks.

[0056] In this embodiment, please refer again. Figure 4 , Figure 5 As shown, the motion trajectory of blade 4 is enveloped and controlled by linkage mechanism 2. After blade 4 self-locks, it matches with skin 5.

[0057] In this embodiment, please refer again. Figure 4 , Figure 5 As shown, the linkage mechanism 2 includes a staggered arrangement of a driving link 201 and a driven link 202.

[0058] In this embodiment, please refer again. Figure 4 , Figure 5As shown, both the active rod 201 and the driven rod 202 are configured as U-shaped rods, with one end of the U-shaped rod fixed to the back of the blade 4 and the other end fixed to the vehicle frame 1.

[0059] In this embodiment, please refer again. Figure 4 , Figure 5 As shown, the linkage assembly includes a first link 301, a second link 302, and a third link 303 connected end to end in sequence, and also includes a fourth link 304. One end of the fourth link 304 is located at the connection point M between the second link 302 and the third link 303, and the other end is connected to the drive rod 305. One end of the first link 301 is connected to the drive rod 201, and the connection point J is located on one side of the U-shaped rod of the drive rod 201. One end of the third link 303 is fixed to the vehicle frame 1. One end of the drive rod 305 is connected to the motor, and the connection point P between the drive rod 305 and the motor and the connection point B between the drive rod 201 and the output shaft are coaxial. The drive rod 305 drives the fourth link 304 to rotate the other links. When the connection point O between the drive rod 305 and the fourth link 304, and the connection points P and M are on a straight line, a dead point mechanism is formed, and the blade 4 is self-locked inside the skin 5. Figure 4 ).

[0060] In this embodiment, please refer again. Figure 4 , Figure 5 As shown, the drive rod 305 rotates around connection point P, driving the fourth link 304 to rotate other links. When the connection points P, O, and M are no longer on the same straight line, the dead-point mechanism is decoupled, and the blade 4 moves normally. Figure 5 ).

[0061] In this embodiment, please refer again. Figure 4 , Figure 5 As shown, the second link 302 and the third link 303 form an integral V-shaped rod.

[0062] The working process of the active air intake grille in this embodiment is as follows:

[0063] like Figure 1 , Figure 4 , Figure 5 As shown, blade 4 is a large-sized blade and an external blade, which matches the skin 5. Blade 4 opens by translation and retraction. Behind blade 4 are two staggered connecting rods: active rod 201 and driven rod 202, which are used to control the movement trajectory of the blade. To avoid the motion envelope of blade 4, active rod 201 and driven rod 202 are designed as U-shaped rods.

[0064] To achieve the self-locking function of the blades, a self-locking mechanism 3 is added. This self-locking mechanism 3 includes a drive rod 305 and a connecting rod assembly. The connecting rod assembly includes a first connecting rod 301, a second connecting rod 302, and a third connecting rod 303 connected end to end in sequence, and also includes a fourth connecting rod 304. One end of the fourth connecting rod 304 is located at the connection point M between the second connecting rod 302 and the third connecting rod 303, and the other end is connected to the drive rod 305. One end of the first connecting rod 301 is connected to the active rod 201, and the connection point J is located on one side of the U-shaped rod of the active rod 201. One end of the third connecting rod 303 is fixed to the vehicle frame 1 through a hole-shaft structure, and the fixing point is N. One end of the drive rod 305 is connected to the motor, and the connection point P between the drive rod 305 and the motor and the connection point B between the active rod 201 and the output shaft are coaxial. Drive rod 305 drives fourth link 304 to rotate other links. When the connection point O of drive rod 305 and fourth link 304, and connection points P and M are on a straight line, a dead point mechanism is formed, and blade 4 is self-locked within skin 5. Figure 4 ).

[0065] Drive rod 305 rotates around connection point P, driving fourth link 304 to rotate other links. When the connection points P, O, and M are no longer on the same straight line, the dead-point mechanism is decoupled, and blade 4 moves normally. Figure 5 ).

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Various variations can be made to the above embodiments of the present invention. For example, the drive mechanism of the present invention can be designed on other links, such as link DGE, or a separate linkage mechanism can be designed as the drive mechanism, with the original hinge mechanism serving as the trajectory determination mechanism.

[0067] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. An active air intake grille capable of self-locking blades, comprising blades (4) and a linkage mechanism (2), characterized in that, It also includes a self-locking mechanism (3), which includes a drive rod (305) and a linkage assembly. One end of the connecting rod assembly is set on the connecting rod mechanism (2), and the other end is connected to the drive rod (305). The drive rod (305) drives the connecting rod assembly to rotate the connecting rod mechanism (2). When the connecting rod assembly rotates to form a dead point mechanism, the blade (4) self-locks.

2. The active air intake grille capable of blade self-locking according to claim 1, characterized in that, The blade (4) is self-locked within the skin (5) and matches the skin (5).

3. An active air intake grille capable of blade self-locking according to claim 1, characterized in that, The linkage mechanism (2) includes staggered active rods (201) and driven rods (202); both the active rods (201) and driven rods (202) are U-shaped rods, with one end of the U-shaped rod fixed to the back of the blade (4) and the other end fixed to the vehicle frame (1).

4. An active air intake grille capable of blade self-locking according to claim 1, characterized in that, The linkage assembly includes: a first link (301), a second link (302), a third link (303), and a fourth link (304). The three links are connected end to end in sequence, and the other link is connected to any connection point of the other three links.

5. An active air intake grille capable of blade self-locking according to claim 4, characterized in that, The second link (302) and the third link (303) constitute any one of an integral U-shaped rod, an integral V-shaped rod, or a triangular plate.

6. An active air intake grille capable of blade self-locking according to claim 4, characterized in that, The linkage assembly includes a first link (301), a second link (302), a third link (303), and a fourth link (304) connected end to end in sequence. One end of the first connecting rod (301) is connected to the active rod (201), and the connection point E is located on one side of the U-shaped rod of the active rod (201); The connection point G' between the second link (302) and the third link (303) is fixed on the vehicle frame (1); The fourth link (304) is connected to the third link (303) at one end and to the drive rod (305) at the other end. The drive rod (305) drives the fourth link (304) to rotate the other links. When the connection point F of the first link (301) and the second link (302), the connection point G' and the connection point E are on a straight line, a dead point mechanism is formed, and the blade (4) is self-locked in the skin (5).

7. An active air intake grille capable of blade self-locking according to claim 6, characterized in that, The drive rod (305) is connected to the fourth link (304) at one end and to the motor at the other end. The connection point B' between the drive rod (305) and the motor and the connection point B between the drive rod (201) and the output shaft are coaxial.

8. An active air intake grille capable of blade self-locking according to claim 6, characterized in that, The drive rod (305) rotates around the connection point B', driving the fourth link (304) to rotate the other links. When the connection points F, G', and E are not on the same straight line, the dead point mechanism is decoupled, and the blade (4) moves normally.

9. An active air intake grille capable of blade self-locking according to claim 4, characterized in that, The linkage assembly includes a first link (301), a second link (302), and a third link (303) connected end to end, and also includes a fourth link (304). One end of the fourth link (304) is located at the connection point M between the second link (302) and the third link (303), and the other end is connected to the drive rod (305); One end of the first connecting rod (301) is connected to the active rod (201), and the connection point J is located on one side of the U-shaped rod of the active rod (201); One end of the third link (303) is fixed to the vehicle frame (1); One end of the drive rod (305) is connected to the motor, and the connection point P between the drive rod (305) and the motor and the connection point B between the drive rod (201) and the output shaft are coaxial; The drive rod (305) drives the fourth link (304) to rotate the other links. When the connection point O of the drive rod (305) and the fourth link (304), the connection point P, and the connection point M are on a straight line, a dead point mechanism is formed, and the blade (4) is self-locked in the skin (5).

10. An active air intake grille capable of blade self-locking according to claim 9, characterized in that, The drive rod (305) rotates around the connection point P, driving the fourth link (304) to rotate the other links. When the connection points P, O, and M are not on the same straight line, the dead point mechanism is decoupled, and the blade (4) moves normally.

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