A fender support-based cover hinge structure and position adjusting method

Abstract

The application belongs to the technical field of white car body, and provides a fender support-based hood hinge structure and position adjusting method, which comprises a fixed leaf, a movable leaf and a fender support; the fixed leaf is fixed to the automobile body; the movable leaf is used for mounting the engine cover plate and is movably connected with the fixed leaf; the fender support is used for mounting the fender body and is detachably connected with the fixed leaf through a screw assembly, and the outer diameter of the screw thread of the screw assembly is smaller than the corresponding hole diameter of the fender support or the fixed leaf. The fender support is additionally arranged between the fixed leaf and the movable leaf, and in the installation process, in order to ensure the installation accuracy of the subsequent fender body, the installation accuracy of the fender support can be adjusted first, and the subsequent fender body is directly mounted on the fender support, thereby avoiding adjusting the installation accuracy of the fender body one by one during on-site installation.

Description

Technical Field

[0001] This invention belongs to the field of body-in-white technology, and specifically relates to a hood hinge structure and position adjustment method based on a fender bracket. Background Technology

[0002] In existing traditional automobile models, the engine hood hinge and fender bracket are mostly arranged in separate independent structures. The fender does not have a dedicated stable mounting benchmark, and there are many technical defects in the welding and sheet metal matching process of the whole vehicle body.

[0003] First, the traditional fender lacks an integrated adjustable support reference. Due to the combined effects of welding tolerances of the body-in-white and stamping manufacturing tolerances of parts, it is difficult to match the gap surface difference between the fender and the engine hood, headlights, and front bumper. It is impossible to achieve batch standardized adjustment on the welding adjustment line. It can only rely on manual adaptation and fine adjustment of each part at the subsequent final assembly station, which is a large amount of debugging work and time-consuming.

[0004] In addition, the conventional split bracket structure is not rigid enough, and the corresponding installation position of the lower windshield trim panel lacks effective reinforcement support. This can easily lead to problems such as weak sheet metal at the installation point and deformation under stress, which in turn can cause appearance and assembly defects such as loosening, warping, and uneven gaps in the lower windshield trim panel assembly, resulting in poor consistency of the assembly quality of the whole vehicle parts. Summary of the Invention

[0005] To address the problems in the background art, this invention proposes a hatch hinge structure and position adjustment method based on a fender bracket.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hatch hinge structure based on a fender bracket includes a fixed flap, a movable flap, and a fender bracket; The mounting plate is fixed to the car body; The movable page is used to install the engine cover and is movably connected to the fixed page; The fender bracket is used to mount the fender body and is detachably connected to the fixing plate via a screw assembly. The outer diameter of the screw assembly thread is smaller than the corresponding hole diameter of the fender bracket or the fixing plate.

[0007] Furthermore, the surface of the fixed page is provided with a number of first mating holes, and the surface of the fender bracket is provided with a number of fourth mating holes equal to the number of first mating holes; The first mating hole and the fourth mating hole are connected by a screw assembly.

[0008] Furthermore, the screw assembly includes a fastening screw and a fastening nut screwed to the fastening screw; When the outer diameter of the fastening screw thread is equal to the diameter of the first mating hole, the diameter of the fourth mating hole is larger than the diameter of the first mating hole; When the outer diameter of the fastening screw thread is equal to the diameter of the fourth mating hole, the diameter of the fourth mating hole is smaller than the diameter of the first mating hole.

[0009] Furthermore, the surface of the fastening nut is provided with several claw-shaped fins.

[0010] Furthermore, the surface of the fixing page is provided with several second mating holes, which are used to mate bolts to fix the fixing page to the car body.

[0011] Furthermore, a first hinge hole is provided at one end of the fixed page, and a second hinge hole is provided at one end of the movable page. The first hinge hole and the second hinge hole are hinged together by a pin.

[0012] Furthermore, a number of third mating holes are provided on one surface of the active page, which are used to install the engine cover plate.

[0013] Furthermore, a number of fifth mating holes are provided on one surface of the fender bracket, which are used to install the fender body.

[0014] Furthermore, a lower windshield trim panel is snapped onto the surface of the fender body away from the fender bracket.

[0015] A position adjustment method, based on the aforementioned hood hinge structure based on a fender bracket, includes the following steps: After the fixing plate is fixed to the car body, the fender bracket is pre-tightened to the fixing plate using the screw assembly; When the outer diameter of the screw assembly thread is smaller than the corresponding hole diameter of the fender bracket, and the outer diameter of the thread is equal to the corresponding hole diameter of the fixed page, move the fender bracket to adjust the position of the fender bracket relative to the fixed page. When the outer diameter of the screw assembly's thread is smaller than the corresponding hole diameter of the fixed page, and the outer diameter of the thread is equal to the corresponding hole diameter of the fender bracket, move the screw assembly to adjust the position of the fender bracket relative to the fixed page.

[0016] The beneficial effects of this invention are: 1. The present invention adds a fender bracket between the fixed page and the movable page. During the installation process, in order to ensure the installation accuracy of the fender body, the installation accuracy of the fender bracket can be adjusted first, and the fender body can be directly installed on the fender bracket, avoiding the need to adjust the installation accuracy of the fender body one by one on site. 2. The outer diameter of the screw in the screw assembly of the present invention is smaller than that of the fender bracket or the fixing plate. During the pre-installation stage before installation, the fender bracket or the fixing plate can have a certain displacement margin in the radial direction of the outer diameter of the screw to ensure the installation accuracy of the fender bracket. During the subsequent return to the factory for maintenance, the fastening screw can be loosened, and then only the relative position of the fender bracket and the fixing plate needs to be adjusted, which reduces the amount of debugging work and the time required. 3. This invention clips the lower windshield trim panel onto the surface of the fender body, allowing the lower windshield trim panel to be reinforced and supported by the fender bracket, thereby improving structural rigidity and solving the problem of weak sheet metal at the installation point and deformation under stress.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a hatch hinge structure based on a fender bracket according to the present invention is shown. Figure 2 A schematic diagram of the fixed page structure of the present invention is shown; Figure 3 A schematic diagram of the active page structure of the present invention is shown; Figure 4 A schematic diagram of the structure of the fender bracket of the present invention is shown; Figure 5 A schematic diagram of the screw assembly of the present invention is shown; Figure 6 An assembly cross-sectional view of a hatch hinge structure based on a fender bracket according to the present invention is shown; Figure 7 An exploded view of a hatch hinge structure based on a fender bracket according to the present invention is shown; Figure 8 A flowchart of a position adjustment method according to the present invention is shown.

[0020] In the diagram: 1. Fixed flap; 101. First mating hole; 102. First hinge hole; 103. Second mating hole; 2. Movable flap; 201. Second hinge hole; 202. Third mating hole; 3. Fender bracket; 301. Fourth mating hole; 302. Fifth mating hole; 4. Screw assembly; 401. Fastening screw; 402. Fastening nut; 403. Claw-shaped flap; 5. Engine cover; 6. Lower windshield trim panel; 7. Fender body; 8. Searchlight base. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, a hood hinge structure based on a fender bracket is disclosed, consisting of a fixed leaf 1, a movable leaf 2, and a fender bracket 3. The fixed leaf 1 can be fixedly connected to the vehicle body, specifically to the longitudinal beam of the front engine compartment, the upper crossbeam of the radiator, or the front body sheet metal. The movable leaf 2 can mount the engine hood 5 and is movably connected to the fixed leaf 1, allowing the movable leaf 2 to rotate flexibly relative to the fixed leaf 1, thereby driving the engine hood 5 to open and close. This meets the daily inspection and maintenance needs of the vehicle's engine compartment. The design of the movable connection must ensure smooth rotation and sufficient structural strength to prevent jamming or loosening during the opening of the engine hood 5. The fender bracket 3 is used to mount the fender body 7, and it is detachably connected to the fixed leaf 1 via a screw assembly 4. The outer diameter of the screw assembly 4 thread is smaller than the corresponding hole diameter of the fender bracket 3 or the fixed leaf 1, so that there is an adjustable allowance between the fixed leaf 1 or the fender bracket 3 and the screw assembly 4.

[0023] It should be noted that this embodiment integrates the fender bracket 3 and the hood hinge fixing page 1 into a single structure, replacing the conventional layout where the hood hinge and fender bracket are independent and separately arranged. This integrated, one-piece design effectively simplifies the composition of the front-end components, significantly reduces the number of scattered parts, and rationally compresses the structural volume within the limited front-end space, effectively saving installation space in the engine compartment and surrounding areas, and reserving ample redundant space for the layout of other vehicle accessories.

[0024] At the same time, the integrated structure eliminates the cumbersome process of positioning and assembling two independent parts separately in the traditional structure, which significantly simplifies the overall assembly process of the production line, reduces the process steps and operational difficulties caused by the alignment and installation of multiple parts, effectively shortens the assembly time in the automobile manufacturing process, improves the assembly efficiency of the assembly line, and effectively controls and reduces the overall vehicle manufacturing cost from the process end.

[0025] In addition, the detachable connection structure adopted in this solution further enhances the convenience of after-sales inspection and routine maintenance of the vehicle. During long-term use of the vehicle, if any component of the fender bracket 3 or the hood hinge becomes deformed, worn, corroded, or functionally damaged, it is not necessary to disassemble and replace the entire related structure. The faulty component can be disassembled and replaced individually, making the maintenance operation simple and efficient. This avoids the drawbacks of traditional one-piece, non-detachable structures that can only be replaced as a whole, significantly reducing the cost of replacement parts and maintenance labor costs in the later stages of vehicle maintenance. It has good practicality, economy, and maintenance convenience.

[0026] It should be further explained that the fixed page 1, movable page 2, and fender bracket 3 can be manufactured by stamping and forming with high-strength stamped steel plate or aerospace-grade aluminum alloy, depending on the vehicle's lightweight and structural strength requirements. High-strength stamped steel plate has advantages such as high tensile strength, strong resistance to deformation, good structural stability, and controllable cost, meeting the load-bearing and protection requirements under complex driving conditions. Aluminum alloy, on the other hand, has lower density and excellent corrosion resistance, significantly reducing the weight of unsprung parts and some components while maintaining structural support rigidity and assembly strength. This effectively reduces vehicle energy consumption, lowers fuel or electricity consumption, and comprehensively contributes to energy conservation and emission reduction, improving range performance and driving dynamics.

[0027] Meanwhile, the movable hinge joint between the active page 2 and the fixed page 1 can be optimized with features such as an embedded oil storage lubrication structure, a dustproof and wear-resistant bushing, and a gap-adaptive lubrication groove. By incorporating a long-lasting lubricating medium, the frictional resistance during hinge rotation can be significantly reduced, improving the smoothness and damping uniformity of the opening, closing, and rotation processes. It also effectively prevents problems such as jamming, abnormal noise, and looseness after long-term use, reduces component wear and aging, and isolates external impurities such as dust and mud from intruding into the friction pairs. This significantly improves the overall stability and weather resistance of the device, effectively extending the overall product lifespan and reducing subsequent maintenance and replacement costs.

[0028] Combination Figure 2 and Figure 4 It can be seen that a number of first mating holes 101 are provided on the surface of the fixed page 1, and correspondingly, a number of fourth mating holes 301 are provided on the surface of the fender bracket 3, which are the same as the number of first mating holes 101. The screw assembly 4 passes through the first mating holes 101 and the fourth mating holes 301 to realize the detachable connection between the fixed page 1 and the fender bracket 3.

[0029] It should be noted that the number of the first mating hole 101 and the fourth mating hole 301 are set in a corresponding manner to ensure that the installation position of the screw assembly 4 is evenly distributed, so that the connection between the fixing page 1 and the fender bracket 3 is evenly stressed, and structural deformation caused by excessive local stress is avoided.

[0030] Optionally, the structural design can be flexibly configured. The first mating hole 101 and the fourth mating hole 301 can be designed and manufactured using a standard round hole structure. During manufacturing, the hole diameter accuracy must be strictly controlled, with dimensional tolerances strictly controlled within ±0.1mm. This ensures the coaxiality and matching accuracy of the assembly between the two mating holes and the screw assembly 4, avoiding problems such as assembly jamming, uneven gaps, or loosening and abnormal noise caused by hole position deviations. Simultaneously, the number of mating holes can be flexibly set according to the actual assembly conditions, load-bearing capacity, and structural layout requirements of the vehicle. A standard configuration is 2 to 4 holes, with 2 being the preferred number. All mating holes must be evenly and symmetrically arranged at the corresponding installation positions of the fixed page 1 and the fender bracket 3. Through a reasonable hole layout and multi-point mating structure, the assembly stress is effectively distributed, further improving the connection rigidity, assembly firmness, and overall structural stability between the two.

[0031] Optionally, the fixing page 1 has two first mating holes 101 symmetrically formed along its length, with the two holes maintaining a reasonable spacing and arranged symmetrically from left to right. On the mounting surface of the fender bracket 3 that mates with the fixing page 1, two fourth mating holes 301 are formed corresponding to the holes, with the hole diameter and shape perfectly matching the first mating holes 101. During assembly, the two sets of screw assemblies 4 are inserted one-to-one for locking, employing a two-point fixing method. This results in a simple structural layout, low cost for parts processing and mold opening, simple and quick assembly, and convenient disassembly and maintenance. This two-hole arrangement provides reliable positioning and limits front-to-back and left-to-right offset, making it suitable for fender connection scenarios in conventional vehicle models with normal loads and low vibrations. It can meet the assembly, fixing, and structural support requirements under daily driving conditions.

[0032] Optionally, depending on the vehicle's structural strength, load-bearing capacity, and vibration level requirements, three, four, or more first mating holes 101 can be evenly distributed on the fixed page 1. These holes can be arranged in a triangular, equidistant, or rectangular quadrangular pattern. Simultaneously, the fender bracket 3 has an equal number and specification of fourth mating holes 301, ensuring one-to-one alignment. Multiple sets of screw assemblies 4 are simultaneously tightened and fixed, sharing the load at multiple points, resulting in stronger overall connection, superior resistance to torsion, swaying, and fatigue. This design is commonly used in heavy-duty vehicles, off-road vehicles, or in scenarios with complex road conditions and significant vibration, effectively improving the overall rigidity and connection strength of the fixed page 1 and the fender bracket 3.

[0033] It should be noted that the number of the first mating hole 101 and the fourth mating hole 301 are strictly corresponding, which can ensure that the installation position of each screw assembly 4 is evenly distributed along the mating surface, and the locking force and external load can be evenly distributed to each hole position. This makes the overall connection between the fixing page 1 and the fender bracket 3 balanced, avoids stress concentration and excessive force at local points, and prevents problems such as panel warping, local dents, loose connections and structural deformation. This greatly improves the assembly accuracy, structural stability and long-term durability of the device.

[0034] Furthermore, combined Figure 5 It can be seen that the screw assembly 4 includes a fastening screw 401 and a fastening nut 402 screwed to the fastening screw 401, and there are two mating methods, as follows: The first mating method: When the outer diameter of the thread of the fastening screw 401 is equal to the diameter of the first mating hole 101, the diameter of the fourth mating hole 301 is larger than the diameter of the first mating hole 101. At this time, the fastening screw 401 and the first mating hole 101 form a tight fit and cannot move relative to each other. However, because the diameter of the fourth mating hole 301 is larger, it provides adjustment space for the movement of the fender bracket 3 relative to the fixed page 1.

[0035] This method uses the fixed page 1 as the positioning reference. The fastening screw 401 and the first mating hole 101 on the fixed page 1 are designed with equal diameter matching. After assembly, the two form a tight fit without gaps. The fastening screw 401 has no radial movement or offset sliding inside the first mating hole 101. The screw is completely locked and fixed relative to the fixed page 1, establishing a stable and reliable assembly reference. The fourth mating hole 301 on the fender bracket 3 adopts an enlarged hole design, with a hole diameter significantly larger than the outer diameter of the screw and the diameter of the first mating hole. This creates an annular radial clearance allowance between the inner wall of the fourth mating hole and the outer circle of the fastening screw. During assembly and adjustment, the fender bracket 3 can be slightly moved and its position finely adjusted in the front-back and left-right radial directions, using this clearance range as the center. This structure, with a fixed reference and adjustable driven parts, can compensate for part machining tolerances, body welding errors, and cumulative assembly deviations. It can flexibly correct the gap and surface difference deviations between the fender and the surrounding covering parts. The adjustment range is controllable, the reference is unified, the assembly positioning stability is strong, and it is not easy to cause secondary displacement deformation after the adjustment is completed and locked.

[0036] The second type of engagement: When the outer diameter of the thread of the fastening screw 401 is equal to the diameter of the fourth engagement hole 301, the diameter of the fourth engagement hole 301 is smaller than the diameter of the first engagement hole 101. At this time, the fastening screw 401 and the fourth engagement hole 301 form a tight engagement, and can move together with the fender bracket 3 in the larger diameter first engagement hole 101, thereby realizing the adjustment of the position of the fender bracket 3.

[0037] The second method switches the positioning reference to the fender bracket 3. The fastening screw 401 and the fourth mating hole 301 on the fender bracket 3 are matched in diameter. After assembly, the screw and the fourth mating hole 301 form a tight interference or transition fit, and the two are firmly attached as a whole. The fastening screw 401 can move synchronously with the fender bracket 3 without relative slippage. At the same time, the first mating hole 101 on the fixing page 1 adopts a large-diameter design, with the hole diameter larger than the outer diameter of the fastening screw 401, leaving sufficient clearance between the inner wall of the first mating hole and the outer circumference of the screw. In the actual assembly and adjustment process, it is only necessary to directly move and adjust the installation position of the fender bracket 3, and the fastening screw 401 will move freely radially inside the large-diameter first mating hole 101 with the bracket as a whole, and simultaneously complete the position alignment and clearance matching. This method is intuitive to operate and the adjustment action is integrated. There is no need to align the screw reference separately. The matching calibration can be completed directly with the bracket as the main body of adjustment. It is suitable for convenient adjustment operations in narrow installation spaces, and the operation is simpler and more flexible when disassembling, assembling and repairing.

[0038] It should be noted that both of the above-mentioned fitting methods utilize the difference in diameter between different fitting holes to create a controllable radial adjustment margin. The fastening screws 401 form a tight fit with either the first fitting hole 101 or the fourth fitting hole 301, selectively restricting the displacement freedom of either the fixed page 1 or the fender bracket 3, while simultaneously reserving reasonable adjustment space for the other. Both structures operate on the same principle, smoothly achieving fine-tuning of the fender bracket 3 relative to the fixed page 1. This effectively solves the industry pain points inherent in traditional integrated hole-mounted structures, such as the inability to perform secondary fine-tuning after installation, difficulty in compensating for part tolerances, uneven assembly gaps and surface differences in the vehicle body, and poor matching consistency. This significantly improves the overall vehicle body assembly precision, mass production consistency, and ease of subsequent repair and adjustment.

[0039] Furthermore, the surface of the fastening nut 402 is provided with a plurality of claw-shaped fins 403. When the fastening nut 402 is screwed and tightened with the fastening screw 401, the claw-shaped fins 403 will closely fit with the surface of the fixing page 1 or the fender bracket 3, generating a certain elastic pressure. On the one hand, this increases the friction between the fastening nut 402 and the contact surface, preventing the fastening nut 402 from loosening due to vibration during vehicle operation. On the other hand, it can also provide a certain buffering effect on the tightening position, reducing the impact of vibration on the connection structure. This embodiment does not limit the number of claw-shaped fins 403; for example, Figure 5 The number of claw-shaped winglets 403 is set to 4, which are evenly distributed on the circumferential surface of the fastening nut 402 to ensure uniform force distribution; the claw-shaped winglets 403 can be made of elastic steel sheet material, which has good elasticity and wear resistance, and extends service life.

[0040] It is worth noting that the claw-shaped wing 403 in the above structure can significantly enhance the overall anti-loosening and locking reliability of the screw assembly 4. During daily driving, vehicles are continuously subjected to multi-dimensional alternating loads such as road bumps, body vibration, and engine operating vibration, which can easily cause the fastening nut 402 to become loose or stripped. The claw-shaped wing 403 can effectively suppress the loosening trend caused by vibration by relying on its own structural interlocking and limiting effect, thereby avoiding the risk of the fastening nut 402 loosening on its own. This stabilizes the assembly reference position of the fender bracket 3, prevents assembly deviation problems such as bracket displacement and misalignment caused by nut loosening, and ensures the matching accuracy of the vehicle appearance and long-term stability.

[0041] Furthermore, such as Figure 2 As shown, the surface of the fixing page 1 has a plurality of second mating holes 103, which are used to engage bolts to fix the fixing page 1 to the vehicle body. This embodiment does not limit the number of second mating holes 103; for example, it can be set to two.

[0042] Furthermore, such as Figure 2 As shown, a first hinge hole 102 is provided at one end of the fixed page 1, as... Figure 3 As shown, a second hinge hole 201 is provided at one end of the movable page 2. The first hinge hole 102 and the second hinge hole 201 are hinged together by a pin.

[0043] It should be noted that the pin passes through the first hinge hole 102 and the second hinge hole 201, connecting the fixed page 1 and the movable page 2 into a whole. The pin and the hinge hole adopt a clearance fit to ensure that the movable page 2 can rotate flexibly around the pin, thereby driving the engine cover 5 to open and close.

[0044] Optionally, the pin surface can be galvanized or chrome-plated to improve rust resistance and wear resistance; a bushing can be added inside the hinge hole to reduce wear between the pin and the hinge hole and extend the service life of the rotating structure; at the same time, a limiting structure can be added to the hinge part to limit the rotation angle of the movable page 2 and avoid damage to the components caused by excessive opening angle of the engine cover 5.

[0045] Furthermore, the upper surface of the active page 2 is provided with a plurality of third mating holes 202, which are used to install the engine cover plate 5. This embodiment does not limit the number of third mating holes 202; for example, Figure 3 There are two third mating holes 202 in the middle.

[0046] Furthermore, a plurality of fifth mating holes 302 are formed on one surface of the fender bracket 3. These fifth mating holes 302 are used to install the fender body 7. This embodiment does not limit the number of fifth mating holes 302; for example, such as… Figure 4 As shown, there can be two fifth mating holes 302.

[0047] It should be noted that by passing bolts through the fifth mating hole 302, the fender body 7 is firmly fixed to the fender bracket 3, so that the position adjustment of the fender bracket 3 can synchronously drive the position adjustment of the fender body 7. The number and distribution of the mating holes have been optimized to ensure that the fender body 7 is firmly installed and the force is evenly distributed, and to prevent the fender body 7 from deforming or loosening.

[0048] Furthermore, such as Figure 6 As shown, a lower windshield trim panel 6 is snapped onto the surface of the fender body 7 away from the fender bracket 3. The lower windshield trim panel 6 can adopt a flexible snap-fit ​​structure, which cooperates with the preset slot of the fender body 7 to achieve quick snap-fit ​​fixation between the lower windshield trim panel 6 and the fender body 7. The lower windshield trim panel 6 is used to cover the gap between the fender body 7 and the windshield, improve the overall appearance and aesthetics of the vehicle body, and at the same time play a role in dust and water protection, preventing dust and rainwater from entering the interior of the vehicle body.

[0049] like Figure 8 As shown, an adjustment method based on the aforementioned hood hinge structure based on a fender bracket includes the following steps: S1: After fixing the fixing plate 1 to the car body, pre-tighten the fender bracket 3 to the fixing plate 1 using the screw assembly 4; specifically, fix the fixing plate 1 to the car body by engaging the bolt through the second mating hole 103, ensuring that the fixing plate 1 is not loose; then, pre-tighten the fender bracket 3 to the fixing plate 1 using the screw assembly 4. At this time, the screw assembly 4 is not completely tightened, leaving a certain adjustment margin to facilitate subsequent position adjustment.

[0050] S2: When the outer diameter of the thread of the screw assembly 4 is smaller than the corresponding hole diameter of the fender bracket 3 (the hole diameter of the fourth mating hole 301), and the outer diameter of the thread is equal to the corresponding hole diameter of the fixed page 1 (the hole diameter of the first mating hole 101), the fender bracket 3 is moved to adjust the position of the fender bracket 3 relative to the fixed page 1; when the outer diameter of the thread of the screw assembly 4 is smaller than the corresponding hole diameter of the fixed page 1, and the outer diameter of the thread is equal to the corresponding hole diameter of the fender bracket 3, the screw assembly 4 is moved to adjust the position of the fender bracket 3 relative to the fixed page 1.

[0051] S3: After the fender bracket 3 is adjusted to the preset position, tighten the fastening screw 401 and fastening nut 402. Through the anti-loosening effect of the claw-shaped wing 403, ensure that the fender bracket 3 is firmly fixed and complete the adjustment operation.

[0052] It should be noted that the above adjustment method is based on the fit between two apertures, utilizing the adjustment margin formed by the aperture difference to adjust the position of the fender bracket 3. The two adjustment methods can be flexibly selected according to actual assembly needs, adapting to different assembly scenarios. Moreover, the above adjustment method is simple and convenient to operate, requiring no complex tools, and can quickly achieve fine-tuning of the position of the fender bracket 3, effectively solving the problems of the inability to adjust the position of the traditional fender after installation and uneven assembly gaps, thus improving assembly efficiency and quality. At the same time, no other parts need to be disassembled during the adjustment process, reducing assembly difficulty and labor intensity, making it suitable for assembly operations in mass production.

[0053] It should be further explained that during the adjustment process, a ruler or positioning fixture can be used to further improve the adjustment accuracy of the fender bracket 3; for mass production scenarios, an adjustment benchmark can be preset to ensure the consistency of the fender position of each vehicle; after the adjustment is completed, the tightening torque of the screw assembly 4 can be tested to ensure that it is tightened in place and to avoid loosening later.

[0054] The following is an introduction Figure 7 Application of the adjustment method in three stages: Before the screw assembly 4 is tightened, the above method provides the necessary adjustment margin for the fender bracket 3 in the X direction (front-to-back direction of the vehicle body) and the Z direction (up-and-down direction of the vehicle body), thereby effectively compensating for the manufacturing error of the parts and the cumulative error of the vehicle body.

[0055] Phase 1: The goal of this phase is to proactively control deviations and perform batch calibration using tooling before the assembly is installed on the vehicle. Specifically, the fender bracket 3 is pre-fixed to the fixed page 1 using screw assembly 4, with the fastening screw 401 in a loose state. A dedicated adjustment tooling, which integrates standard positioning data, is used. This tooling will position and guide the fender bracket 3 in all hinge assemblies of this batch to the theoretically optimal position to compensate for batch part deviations. With the tooling in the positioned state, the screw assembly 4 is pre-installed to the specified torque to complete the standardized pre-assembly of the hinge assembly.

[0056] First, the fender bracket 3 is pre-assembled and temporarily fixed to the fixed page 1 structure using screw assembly 4. During assembly, the fastening screws 401 must be kept completely loose and not tightened to allow for subsequent fine-tuning. Then, a dedicated adjustment fixture is used for positioning. This fixture has pre-integrated theoretical standard positioning data and reference parameters for the entire vehicle, enabling unified benchmarking and batch adaptation. Using this dedicated fixture, the fender brackets 3 in all hinge assemblies to be assembled in this batch can be centrally positioned and guided in one go, uniformly adjusting each bracket to the theoretically optimal assembly position specified in the design. This effectively compensates for batch manufacturing tolerances and form deviations inherent in the components, ensuring consistent assembly benchmark height for products in the same batch. After the fixture completes positioning and remains locked, the screw assembly 4 is initially tightened in stages according to the standard torque values ​​specified in the process documents. This locks the relative assembly position of the fender brackets, ultimately completing the standardized and consistent pre-assembly of the entire hinge assembly.

[0057] It is worth noting that the introduction of specialized tooling during fender assembly effectively enables standardized and regulated batch adjustments of fenders produced in the pre-assembly or welding adjustment stages, achieving the preset assembly adjustment goals. This tooling application model fundamentally transforms the inefficient traditional production process that relies excessively on manual adjustments by operators in the final assembly stage, effectively addressing many pain points of traditional manual adjustments. The use of specialized tooling, through standardized positioning benchmarks and standardized adjustment procedures, achieves unified and modular fender adjustment operations. It eliminates reliance on operators' personal experience, allowing for rapid and efficient batch adjustments of fenders. This significantly shortens the adjustment time per vehicle, effectively improves the overall production cycle, ensures production progress stability, minimizes human error, and greatly enhances the consistency and stability of fender assembly quality.

[0058] Phase Two: The core objective of this phase is to conduct fine-tuning and calibration of the fender body 7's fit and alignment accuracy under actual vehicle assembly conditions. This begins with the hinge assembly (see [link to previous phase]) that has already undergone pre-calibration. Figure 1 The fender body 7 is then formally installed in its corresponding position on the body-in-white. Following this, the fender body 7 is positioned and installed, and its main mounting points are initially tightened. After assembly, the operator visually inspects the area between the fender body 7 and the fender bracket 3 from a side view of the vehicle body, and simultaneously touches the contact area to check for any visible gaps or mismatch issues such as support misalignment or localized "soft support."

[0059] If any gaps or inadequate support are found during inspection, the screw assembly 4 can be loosened appropriately, with the rotation angle controlled between 30° and 45°, allowing for slight adjustment of the fender bracket 3. The operator manually lifts the fender bracket 3 to its optimal fit, simultaneously finely adjusting the Z-axis installation height until the bracket support surface and the inner wall of the fender body 7 are completely flush, without gaps or play. After confirming the fit is correct, the bolts are finally tightened to the standard torque specified in the process. This meticulous adjustment and tightening process ensures uniform and reliable rigid support for the fender body 7, effectively eliminating assembly defects and significantly improving the smoothness and appearance quality of the entire vehicle.

[0060] The third stage: This structural design offers excellent adjustability in vehicle after-sales maintenance, effectively avoiding and resolving spatial interference and disassembly / removal limitations associated with certain components during assembly. During routine maintenance work, such as the removal and replacement of the lower windshield trim panel 6, it is often necessary to adjust the installation position of the fender bracket 3 to create sufficient space for disassembly and assembly, ensuring smooth maintenance. In practice, the fixing bolts of the fender bracket 3 can be completely loosened, allowing the bracket to slide freely within the pre-reserved adjustment range of the bolt holes, adjusting it to a suitable position for construction, based on the actual space requirements of the on-site maintenance work. After all relevant maintenance procedures are completed, the fender bracket 3 can either be returned to its original design reference position and the bolts tightened, or it can be directly fixed and locked in the adjusted new position according to the actual assembly state. Meanwhile, if... Figure 8 As shown in the structural diagram, in addition to fulfilling the original vehicle assembly and maintenance adjustment functions, the fender bracket also has a reserved adaptation installation structure, which can serve as a reliable installation point for the eco-friendly retrofit searchlight base 8, and has the dual use value of maintenance adaptation and later modification expansion.

[0061] In summary, the process for adjusting the matching gaps in this vehicle model is a complete closed-loop control system that covers the entire vehicle production process and runs through the main production line in the workshop and the after-sales terminal in the market.

[0062] In the early stages of sub-assembly and pre-adjustment, advance inspection and fine-tuning of components during pre-assembly can predict and avoid problems such as dimensional deviations of components and cumulative assembly deviations, achieving proactive prevention and control of assembly deviations. This stage can effectively reduce the amount of rework and rectification work in subsequent workstations, significantly optimize the assembly rhythm of the vehicle mainline, reduce the risk of assembly delays and line stoppages, and simultaneously improve the first-pass yield of the entire vehicle, laying a solid foundation for the smooth and efficient progress of subsequent processes.

[0063] In the mid-term welding fine-tuning stage, relying on the professional tooling, testing methods, and standardized adjustment processes of the welding station, the key joint parts and appearance matching areas of the vehicle body are meticulously corrected and controlled to achieve final locking and closed-loop termination of the body matching quality. From a process perspective, key appearance characteristic indicators such as body gaps, surface differences, and flatness are strictly controlled to fundamentally ensure the matching accuracy between body exterior components and the overall appearance quality, thus stabilizing the basic quality of the vehicle upon delivery.

[0064] In the later stages of final assembly repair and adjustment, as well as after-sales maintenance adjustments, a comprehensive set of repair and calibration standards and operating procedures are established. This provides standardized technical support for production line anomaly repairs and end-user after-sales maintenance, effectively ensuring dual quality assurance for both the finished vehicle and its market use. Simultaneously, ample operational space and process flexibility are provided for repair operations, adapting to different fault conditions and varying degrees of component wear and tear. This ensures that after repair or after-sales maintenance, all matching parameters, appearance, and performance are restored to original factory standards, achieving post-repair quality consistent with that of a new vehicle.

[0065] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hatch hinge structure based on a fender bracket, characterized in that, Includes a fixed page (1), a movable page (2), and a fender bracket (3); The fixing page (1) is fixed to the car body; The movable page (2) is used to install the engine cover plate (5) and is movably connected to the fixed page (1); The fender bracket (3) is used to install the fender body (7) and is detachably connected to the fixing page (1) by a screw assembly (4), wherein the outer diameter of the thread of the screw assembly (4) is smaller than the corresponding hole diameter of the fender bracket (3) or the fixing page (1).

2. The hatch hinge structure based on a fender bracket according to claim 1, characterized in that, The surface of the fixed page (1) is provided with a plurality of first mating holes (101), and the surface of the fender bracket (3) is provided with a fourth mating hole (301) in the same number as the first mating holes (101). The first mating hole (101) and the fourth mating hole (301) are connected by the screw assembly (4).

3. The hatch hinge structure based on a fender bracket according to claim 2, characterized in that, The screw assembly (4) includes a fastening screw (401) and a fastening nut (402) screwed to the fastening screw (401). When the outer diameter of the thread of the fastening screw (401) is equal to the diameter of the first mating hole (101), the diameter of the fourth mating hole (301) is greater than the diameter of the first mating hole (101). When the outer diameter of the thread of the fastening screw (401) is equal to the diameter of the fourth mating hole (301), the diameter of the fourth mating hole (301) is smaller than the diameter of the first mating hole (101).

4. The hatch hinge structure based on a fender bracket according to claim 3, characterized in that, The fastening nut (402) has a number of claw-shaped fins (403) on its surface.

5. The hatch hinge structure based on a fender bracket according to claim 1, characterized in that, The surface of the fixing page (1) is provided with a plurality of second mating holes (103), which are used to fit bolts to fix the fixing page (1) to the car body.

6. The hatch hinge structure based on a fender bracket according to claim 1, characterized in that, The fixed page (1) has a first hinge hole (102) at one end, and the movable page (2) has a second hinge hole (201) at one end. The first hinge hole (102) and the second hinge hole (201) are hinged by a pin.

7. The hatch hinge structure based on a fender bracket according to claim 1, characterized in that, The active page (2) has a plurality of third mating holes (202) on one surface, and the third mating holes (202) are used to install the engine cover plate (5).

8. The hatch hinge structure based on a fender bracket according to claim 1, characterized in that, The fender bracket (3) has a plurality of fifth mating holes (302) on one surface, and the fifth mating holes (302) are used to install the fender body (7).

9. A hatch hinge structure based on a fender bracket according to claim 8, characterized in that, The fender body (7) has a windshield trim panel (6) attached to the surface away from the fender bracket (3).

10. A position adjustment method, based on a hatch hinge structure based on a fender bracket as described in any one of claims 1-9, characterized in that, Includes the following steps: After the fixing page (1) is fixed to the car body, the fender bracket (3) is pre-tightened to the fixing page (1) by the screw assembly (4); When the outer diameter of the thread of the screw assembly (4) is smaller than the corresponding hole diameter of the fender bracket (3) and the outer diameter of the thread is equal to the corresponding hole diameter of the fixed page (1), the fender bracket (3) is moved to adjust the position of the fender bracket (3) relative to the fixed page (1). When the outer diameter of the thread of the screw assembly (4) is smaller than the corresponding hole diameter of the fixed page (1) and the outer diameter of the thread is equal to the corresponding hole diameter of the fender bracket (3), the screw assembly (4) is moved to adjust the position of the fender bracket (3) relative to the fixed page (1).

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