A kind of active air intake grille structure for range extender

Abstract

The utility model relates to the technical field of range extending type automobile, especially increase a kind of active air intake grille structure for range extender, including grille frame, the upper or front area of car rear wheel package is provided with grille mounting hole;Grille frame one end is embedded and fixed in the inboard of grille mounting hole, forms air inlet end, the other end is equipped with air outlet end, for connecting the air intake system of range extender;Drive assembly is located on grille frame, for driving flap to carry out overturning movement, to open or close air inlet end. By arranging air inlet end in the upper or front area of car rear wheel package, and setting flap controlled by drive assembly, active opening and closure to air inlet end are realized. When vehicle is in pure electric driving mode, range extender does not need to work, flap closes air inlet end under the action of drive assembly, effectively reduces vehicle front end airflow interference, reduces air resistance, improves pure electric cruising range;When range extender starts, flap is automatically opened, guarantees engine air intake demand.

Description

Technical Field

[0001] This utility model relates to the field of range-extended vehicle technology, and in particular to an active air intake grille structure for a range extender. Background Technology

[0002] With the development of new energy vehicle technology, range-extended electric vehicles (REEVs) have gradually become one of the mainstream models in the market due to their combination of the environmental friendliness of pure electric drive and the long range provided by the range extender. In existing range-extended vehicle designs, to ensure the air intake requirements of the range extender during operation, the front air intake grille of the vehicle usually has a fixed opening to ensure airflow. For example, a vehicle disclosed in utility model publication number CN211519244U includes: a vehicle body and an engine, with the engine located at the rear of the vehicle body. The air intake system is connected to the engine and includes an air intake port located at the front of the vehicle body.

[0003] However, when the vehicle is in pure electric driving mode, the range extender is off and does not require air intake. At this time, the fixed air intake at the front of the vehicle increases wind resistance, reducing the vehicle's pure electric driving range. To solve this problem, it is necessary to provide an active air intake grille structure for the range extender. Utility Model Content

[0004] In view of this, this utility model proposes an active air intake grille structure for a range extender. It achieves active opening and closing of the air intake by arranging the air intake end above or in front of the rear wheel arches and incorporating a flap controlled by a drive assembly. When the vehicle is in pure electric driving mode, the range extender does not need to operate; the flap closes the air intake end under the action of the drive assembly, effectively reducing airflow interference at the front of the vehicle, lowering air resistance, and increasing the pure electric range. When the range extender starts, the flap automatically opens to ensure the engine's air intake needs are met. This utility model solves the technical problem of increased wind resistance and reduced range in existing range extender models due to the fixed front air intake opening in pure electric mode.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides an active air intake grille structure for a range extender, including a grille frame, a flap, a drive assembly, and a rear wheel arch support.

[0007] The area above or in front of the rear wheel arch is provided with a grille mounting hole;

[0008] One end of the grille frame is embedded and fixed inside the grille mounting hole to form an air inlet, and the other end is provided with an air outlet for connecting to the air intake system of the range extender.

[0009] The flap is rotatably disposed on the inner side of the air intake end;

[0010] The drive assembly is located on the grille frame and is used to drive the flap to rotate, so as to open or close the air intake end.

[0011] Based on the above technical solutions, preferably, a mounting seat is fixed to the side of the grille frame, and a support seat is fixed to the inner surface of the rear wheel arch.

[0012] The mounting base is fixedly connected to the support base.

[0013] Based on the above technical solutions, preferably, a rotating shaft is fixed on the flip plate, and the driving assembly includes a motor, wherein...

[0014] Both the motor and the rotating shaft are located inside the grille frame and are vertically arranged;

[0015] The two ends of the rotating shaft are rotatably connected to the grid frame, and the motor is fixedly connected to the grid frame;

[0016] The upper end of the rotating shaft and the output shaft of the motor both extend upward through the grid frame to the top of the grid frame and are connected by a gear and rack transmission.

[0017] Based on the above technical solutions, preferably, the drive assembly further includes a translation rod, a gear, and a rack, wherein,

[0018] The translation rod is located between the upper end of the rotating shaft and the motor output shaft, and is horizontally slidably connected to the grid frame;

[0019] The gear is fixed on both the rotating shaft and the output shaft of the motor;

[0020] The rack is fixed on both sides of the translation rod, and the rack on each side meshes with the gear on the corresponding side.

[0021] Based on the above technical solutions, preferably, the driving component further includes a positioning sleeve, wherein...

[0022] Two positioning sleeves are fixed at the top of the grille frame;

[0023] The translation rod is located between the two positioning sleeves, with its two ends slidingly inserted into the interior of the corresponding positioning sleeves.

[0024] Based on the above technical solutions, preferably, a positioning protrusion is fixed to the top of the motor, and a positioning countersunk hole is opened on the top inner side of the grille frame.

[0025] The positioning protrusion is embedded inside the positioning countersunk hole and is fixedly connected.

[0026] Based on the above technical solution, preferably, several flaps are equidistantly arranged along the sliding direction of the translation rod, wherein,

[0027] Several of the flaps form a louver structure with the grille frame via corresponding pivots.

[0028] Based on the above technical solutions, preferably, an outer cover is fixed to the top of the grille frame, wherein...

[0029] The translation rod, gear, rack, and positioning sleeve are all located inside the outer cover.

[0030] Based on the above technical solutions, preferably, the upper end of the rotating shaft and the upper end of the output shaft of the motor are both rotatably connected to the top of the outer cover.

[0031] Based on the above technical solutions, preferably, in the closed state of the air intake end, the outer surface of the flap is coplanar with the outer end face of the air intake end, and the coplanar area forms a continuous curved surface structure with the local outer surface of the rear wheel arch.

[0032] The active air intake grille structure for a range extender of this utility model has the following advantages over the prior art:

[0033] (1) By arranging the air intake end above or in front of the rear wheel arch and setting a flap controlled by the drive component, the active opening and closing of the air intake end can be achieved. When the vehicle is in pure electric driving mode, the range extender does not need to work, and the flap closes the air intake end under the action of the drive component, effectively reducing airflow interference at the front of the vehicle, reducing air resistance, and improving the pure electric range; when the range extender is started, the flap opens automatically to ensure the engine's air intake needs, thus achieving synergistic optimization of air intake needs and aerodynamic performance.

[0034] (2) By using the combination of translation rod, gear and rack, the rotational motion of the motor is converted into the linear motion of the translation rod, which in turn drives multiple flaps to move synchronously, realizing multi-flap linkage control. The structure is simple, the synchronization is good, and the transmission reliability is high.

[0035] (3) By using two positioning sleeves to slide and guide the two ends of the translation rod, a stable double-support linear guide mechanism is formed, which effectively prevents the translation rod from deflecting or jamming during the movement, ensures the continuous and stable meshing of the rack and gear, and improves the smoothness of transmission.

[0036] (4) By setting the upper end of the rotating shaft and the motor output shaft to be rotatably connected to the top of the outer cover, it is convenient to provide stable axial support with the help of the outer cover, effectively restrict the swing of the shaft end, further enhance the meshing stability between the gear and the rack, and improve the transmission accuracy and the reliability of the system operation.

[0037] (5) When the flap is closed, its outer surface is coplanar with the outer end face of the air intake end and forms a continuous curved surface structure with the local outer surface of the rear wheel arch, so that the air intake area and the body surface can be smoothly transitioned, eliminating the airflow separation point, effectively reducing air resistance, optimizing the aerodynamic performance of the whole vehicle, and further improving the pure electric range. Attached Figure Description

[0038] 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.

[0039] Figure 1 This is a perspective view of an active air intake grille structure for a range extender according to this utility model;

[0040] Figure 2 This is a side view of an active air intake grille structure for a range extender according to this utility model;

[0041] Figure 3 for Figure 2 Sectional view along axis AA;

[0042] Figure 4 for Figure 2 BB-direction sectional view;

[0043] Figure 5 for Figure 2 CC-direction sectional view;

[0044] Figure 6 for Figure 2 DD section view;

[0045] Figure 7 This is a partial perspective view of an active air intake grille structure for a range extender according to this utility model;

[0046] In the diagram: 1. Grille frame; 2. Flip plate; 3. Drive assembly; 4. Rear wheel arch; 11. Mounting base; 12. Outer cover; 21. Shaft; 31. Motor; 32. Translation rod; 33. Gear; 34. Rack; 35. Positioning sleeve; 41. Support seat; 101. Air inlet; 102. Air outlet; 103. Positioning countersunk hole; 311. Positioning protrusion; 401. Grille mounting hole. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0049] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] 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.

[0052] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0053] like Figure 1-7 As shown, the present invention provides an active air intake grille structure for a range extender, comprising a grille frame 1, a flap 2, a drive assembly 3, and a rear wheel arch 4.

[0054] The rear wheel arch 4 has a grille mounting hole 401 above or in front of it. One end of the grille frame 1 is embedded and fixed inside the grille mounting hole 401 to form an air intake end 101 facing the external airflow, and the other end has an air outlet end 102 for connecting to the range extender's air intake system, such as the air intake pipe and air filter.

[0055] The flap 2 is rotatably disposed on the inner side of the air intake end 101 for opening and closing the air intake passage. The drive assembly 3 is disposed on the grille frame 1 for driving the flap 2 to rotate to open or close the air intake end 101.

[0056] When the vehicle is in pure electric driving mode, the range extender is in the off state and does not require air intake. The drive assembly 3 controls the flap 2 to rotate to the closed position, sealing the air intake end 101, effectively reducing airflow interference at the front, reducing air resistance, and improving the aerodynamic performance of the entire vehicle. When the range extender starts or is about to start, the drive assembly 3 drives the flap 2 to open, ensuring that the range extender receives sufficient and stable airflow.

[0057] By arranging the air intake 101 in the rear wheel arch area 4, the fixed opening at the front of the vehicle is avoided. Combined with active opening and closing control, the technical problem of increased wind resistance and reduced range caused by the continuous opening of the front air intake in pure electric mode of traditional range-extended vehicles is solved. This achieves synergistic optimization of air intake demand and aerodynamic performance, taking into account both functionality and energy efficiency.

[0058] Based on the above structure, a mounting seat 11 is fixed to the side of the grille frame 1, and a support seat 41 is fixed to the inner surface of the rear wheel arch 4. The mounting seat 11 and the support seat 41 are fixedly connected by fasteners (such as bolts).

[0059] When using bolt installation, the bolts are pre-welded to the inner surface of the rear wheel arch 4. Holes are made in the mounting base 11 for the bolts to pass through. When installing the grille frame 1, the bolts pass through the holes in the mounting base 11 and nuts are screwed onto them. After tightening the nuts, the mounting base 11 and the support base 41 are firmly connected, thereby achieving reliable fixing of the grille frame 1 and the rear wheel arch 4.

[0060] The fastening connection between the mounting base 11 and the support base 41 facilitates disassembly and maintenance, improving the convenience of repair and the flexibility of modular design.

[0061] Furthermore, once the grille frame 1 is fixed to the rear wheel arch 4, the outer end face of the air intake end 101 of the grille frame 1 is coplanar with a portion of the outer surface of the rear wheel arch 4, ensuring the continuity of the vehicle body surface and a smooth aerodynamic transition. This design not only enhances the structural rigidity and stability of the entire air intake system but also effectively reduces air resistance during vehicle operation, further improving the overall aerodynamic performance and pure electric range of the vehicle.

[0062] Meanwhile, the outer surface of the flap 2 is adapted to a portion of the outer surface of the rear wheel arch 4. That is, when the air intake end 101 is closed, the outer surface of the flap 2 is coplanar with the outer end face of the air intake end 101, and the coplanar area forms a continuous curved surface structure with the portion of the outer surface of the rear wheel arch 4. This structure allows for a smooth transition between the air intake area and the vehicle body surface, eliminating airflow separation points, effectively reducing air resistance, optimizing the overall aerodynamic performance of the vehicle, and further improving the vehicle's range in pure electric mode.

[0063] Based on the above structure, a rotating shaft 21 is fixed on the flap 2, and the drive assembly 3 includes a motor 31. Both the motor 31 and the rotating shaft 21 are located inside the grille frame 1 and are arranged vertically. The two ends of the rotating shaft 21 are rotatably connected to the grille frame 1 through bearings to achieve stable support and flexible rotation; the motor 31 is fixedly connected to the grille frame 1 through clips or screws to ensure stable positioning during operation. The upper end of the rotating shaft 21 and the output shaft of the motor 31 both extend upward through the grille frame 1 to its top and are connected by a gear and rack transmission, thereby transmitting the rotational motion of the motor 31 to the rotating shaft 21.

[0064] When the motor 31 starts, its output shaft drives the rotating shaft 21 to rotate synchronously through a gear and rack transmission, which in turn drives the flap 2 to rotate around its axis, thereby opening or closing the air intake end 101.

[0065] The control logic and drive technology for the flip plate 2 controlled by motor 31 are existing mature technologies in this field. For example, patent document CN116080387A has disclosed a motor drive and control method for an active air intake grille, and its control principle can be applied to this structure. The focus of this utility model is on the integrated design of the overall structural layout and transmission mechanism; related control details will not be elaborated here.

[0066] The aforementioned gear and rack transmission method is implemented as follows: the drive assembly 3 further includes a translation rod 32, a gear 33, and a rack 34. The translation rod 32 is located between the upper end of the rotating shaft 21 and the output shaft of the motor 31, and is horizontally slidably connected to the grille frame 1. Gears 33 are fixed on both the rotating shaft 21 and the output shaft of the motor 31. Racks 34 are fixed on both sides of the translation rod 32, and each rack 34 meshes with the corresponding gear 33, forming a double-sided synchronous transmission structure.

[0067] Several flaps 2 are equidistantly arranged along the sliding direction of the translation rod 32, and each flap 2 is rotatably connected to the grille frame 1 via its rotating shaft 21. Several flaps 2 form a louver structure with the grille frame 1 via corresponding rotating shafts 21. When the motor 31 operates, its output shaft drives a gear 33 on one side to rotate. This gear 33 meshes with a rack 34 on the same side, driving the translation rod 32 to move horizontally in a linear motion. This, in turn, drives the rotating shaft 21 to rotate via the gear 33 on the other side, thus flipping the flap 2. This translational motion is transmitted through the translation rod 32 to the rack 34 on the other side, which in turn drives the gear 33 on the other side to rotate, ultimately driving the rotating shaft 21 to rotate, achieving the flipping action of the flap 2.

[0068] This transmission method converts the rotational motion of the motor 31 into the linear reciprocating motion of the translation rod 32, and then into the rotational motion of the rotating shaft 21 through meshing transmission, thereby synchronously controlling the opening and closing of multiple flaps 2. Since all flaps 2 share the same translation rod 32 for drive, the synchronization of their actions is high.

[0069] To guide the movement of the translation rod 32, the drive assembly 3 also includes positioning sleeves 35, two of which are fixed at the top of the grid frame 1. The translation rod 32 is positioned between the two positioning sleeves 35, with its two ends slidingly inserted into the interior of the corresponding positioning sleeves 35, forming a double-support linear guide structure.

[0070] The dual-pivot guide structure provides stable axial support for the translation rod 32, effectively limiting its radial offset and torsional freedom during movement, preventing the translation rod 32 from deflecting or jamming, and ensuring that the racks 34 on both sides and the corresponding gears 33 always maintain good meshing, significantly improving the smoothness and synchronization of the transmission, as well as the reliability and service life of the system in long-term operation.

[0071] Furthermore, the translation rod 32 is a cylindrical rod structure with axially oriented flat surfaces on both sides for mounting the rack 34. The rack 34 is fixed on the flat surfaces, and after installation, its outer surface does not exceed the original cylindrical contour of the translation rod 32, ensuring that the sliding fit of the translation rod 32 is not affected by the rack 34 when passing through the positioning sleeve 35, thus maintaining smooth linear movement.

[0072] Based on the above structure, a positioning protrusion 311 is fixed on the top of the motor 31, and a positioning countersunk hole 103 is opened on the top inner side of the grille frame 1. The positioning protrusion 311 is embedded in the interior of the positioning countersunk hole 103 and is fixedly connected by bolts.

[0073] Specifically, the edge areas on both sides of the top of the motor 31 extend outward to form a mounting plate structure. A positioning protrusion 311 is located on the top of this mounting plate structure. The entire structure is a single piece, possessing good structural strength and dimensional accuracy. A through bolt hole is provided on the positioning protrusion 311. Correspondingly, an internally threaded hole is provided at the bottom of the positioning countersunk hole 103.

[0074] During installation, align the positioning protrusion 311 of the motor 31 with and insert it into the positioning countersunk hole 103 to accurately position the motor 31; then, pass the hexagon socket bolt through the bolt insertion hole from above and screw it into the internal thread hole at the bottom of the positioning countersunk hole 103, and tighten it gradually to achieve a firm connection between the motor 31 and the grid frame 1.

[0075] This positioning and fixing structure not only enables the rapid and accurate assembly of motor 31, improving installation coaxiality and repeatability, but also effectively reduces the risk of vibration and loosening during operation, ensuring the stability of the gear and rack transmission method.

[0076] Based on the above structure, an outer cover 12 is fixed to the top of the grille frame 1, and the translation rod 32, gear 33, rack 34 and positioning sleeve 35 are all located inside the outer cover 12. After the grille frame 1 is installed, the side of the outer cover 12 fits tightly against the inner surface of the rear wheel arch 4, forming a closed protective space.

[0077] The outer cover 12 effectively isolates external dust, moisture and foreign objects from entering the transmission area, preventing gears 33 and rack 34 from wearing or jamming due to contamination, and improving the environmental tolerance and service life of the drive component 3.

[0078] Specifically, the outer cover 12 is fixed to the top of the grille frame 1 by screws or clips to ensure its stability and reliability. The contact surface between the outer cover 12 and the inner surface of the rear wheel arch 4 can be designed as a sealed structure (such as by setting a sealing gasket) to enhance dust and water resistance. This closed design not only protects the internal transmission components but also makes the entire air intake grille system cleaner and more aesthetically pleasing, improving the overall assembly quality and reliability of the vehicle.

[0079] Based on the above structure, the upper end of the rotating shaft 21 and the upper end of the output shaft of the motor 31 are rotatably connected to the top of the outer cover 12. This structure ensures the free rotation of the transmission shaft while providing stable axial support with the help of the outer cover 12, effectively limiting the swing of the shaft end, further enhancing the meshing stability between the gear 33 and the rack 34, and improving the transmission accuracy and the reliability of the system operation.

[0080] In practical applications, the rotating shaft 21 and the grille frame 1 are rotatably connected by bearings, ensuring that the flap 2 rotates flexibly with low frictional resistance, while also possessing good load-bearing capacity and durability. The grille frame 1 can be a rectangular frame structure, and its external dimensions can be designed according to the actual installation space and air intake requirements. For example, the length and width can be 500mm × 300mm, or it can be adjusted to other adaptable dimensions according to the vehicle platform.

[0081] The method of using the active air intake grille structure for a range extender according to this utility model is as follows:

[0082] First, the grille frame 1, flap 2, and drive assembly 3 are pre-assembled to form a complete air intake grille module. Then, the assembled air intake grille module is aligned with the grille mounting holes 401 opened above or in front of the rear wheel arch 4. The air intake end 101 of the grille frame 1 is inserted into the grille mounting holes 401 from the inside, and its position is adjusted to be flush with the vehicle body surface. At this time, the mounting seat 11 on the side of the grille frame 1 is aligned with the support seat 41 on the inner surface of the rear wheel arch 4. Finally, the mounting seat 11 and the support seat 41 are fixedly connected by fasteners to achieve a secure installation of the air intake grille module on the vehicle body.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An active grille shutter structure for a range extender, characterized by: Includes grille frame (1), flap (2), drive assembly (3), and rear wheel arch (4), wherein, A grille mounting hole (401) is provided above or in front of the rear wheel arch (4). One end of the grille frame (1) is embedded and fixed inside the grille mounting hole (401) to form an air inlet (101), and the other end is provided with an air outlet (102) for connecting to the air intake system of the range extender; The flap (2) is rotatably disposed on the inner side of the air inlet end (101); The drive assembly (3) is disposed on the grille frame (1) and is used to drive the flap (2) to rotate to open or close the air intake end (101).

2. The active air intake grille structure for a range extender of claim 1, wherein: A mounting base (11) is fixed to the side of the grille frame (1), and a support base (41) is fixed to the inner surface of the rear wheel arch (4). The mounting base (11) is fixedly connected to the support base (41).

3. The active air intake grille structure for a range extender as described in claim 1, characterized in that: A rotating shaft (21) is fixed on the flap (2), and the driving assembly (3) includes a motor (31), wherein, The motor (31) and the rotating shaft (21) are both located inside the grid frame (1) and are arranged vertically; The two ends of the rotating shaft (21) are rotatably connected to the grid frame (1), and the motor (31) is fixedly connected to the grid frame (1); The upper end of the rotating shaft (21) and the output shaft of the motor (31) both extend upward through the grid frame (1) to the top of the grid frame (1) and are connected by a gear and rack transmission.

4. The active air intake grille structure for a range extender as described in claim 3, characterized in that: The drive assembly (3) further includes a translation rod (32), a gear (33), and a rack (34), wherein, The translation rod (32) is located between the upper end of the rotating shaft (21) and the output shaft of the motor (31), and is horizontally slidably connected to the grid frame (1); The gear (33) is fixed on both the rotating shaft (21) and the output shaft of the motor (31). The translation rod (32) has racks (34) fixed on both sides, and each rack (34) meshes with the gear (33) on the corresponding side.

5. The active air intake grille structure for a range extender as described in claim 4, characterized in that: The drive assembly (3) further includes a positioning sleeve (35), wherein, Two positioning sleeves (35) are fixed at the top of the grid frame (1); The translation rod (32) is located between the two positioning sleeves (35), and its two ends slide through the interior of the corresponding positioning sleeves (35).

6. The active air intake grille structure for a range extender as described in claim 3, characterized in that: The motor (31) has a positioning protrusion (311) fixed on its top, and the inner top of the grille frame (1) has a positioning countersunk hole (103). The positioning protrusion (311) is embedded inside the positioning countersunk hole (103) and fixedly connected.

7. The active air intake grille structure for a range extender as described in claim 4, characterized in that: The flap (2) is provided with several equidistant units along the sliding direction of the translation rod (32), wherein, Several of the flaps (2) form a louver structure with the grille frame (1) through the corresponding pivot (21).

8. The active air intake grille structure for a range extender as described in claim 5, characterized in that: An outer cover (12) is fixed to the top of the grid frame (1), wherein, The translation rod (32), gear (33), rack (34) and positioning sleeve (35) are all located inside the outer cover (12).

9. The active air intake grille structure for a range extender as described in claim 8, characterized in that: The upper end of the rotating shaft (21) and the upper end of the output shaft of the motor (31) are rotatably connected to the top of the outer cover (12).

10. The active air intake grille structure for a range extender as described in claim 1, characterized in that: When the air intake end (101) is closed, the outer surface of the flap (2) is coplanar with the outer end face of the air intake end (101), and the coplanar area forms a continuous curved surface structure with the local outer surface of the rear wheel arch (4).

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