A face difference adjustment tool and method

Abstract

The application discloses a surface difference adjusting tool and method, which is used for adjusting the surface difference between a front bumper and a bonnet, and comprises a base frame, a mounting structure and an adjusting piece. The mounting structure is arranged on the base frame and is used for mounting the main body with a vehicle frame. The adjusting piece is arranged on the base frame and has a first abutting side and a second abutting side in the up-down direction, one of which is used for abutting with the lower part of the bonnet and the other is used for abutting with the upper part of the front bumper support. In the technical scheme, the association between the bonnet and the front bumper mounting surface is established through the adjusting piece, and after the front bumper is mounted on the front bumper mounting surface, the surface difference between the front bumper and the bonnet can meet the requirements, and the first assembly yield is high.

Description

Technical Field

[0001] This invention relates to the field of automotive assembly technology, and in particular to a surface difference adjustment tooling and method. Background Technology

[0002] To enhance the visual impact of car styling, an increasing number of models are adopting a wraparound front fascia structure, with the hood surrounded by the front bumper and fenders. These components have high matching requirements and no tolerance for error. Conventionally, during final assembly, the hood and front bumper are positioned independently, with no direct correlation between their outlines. Precision is transferred layer by layer through the body-in-white, front frame, and front bumper bracket, resulting in a long dimensional chain and a low first-time assembly pass rate. Summary of the Invention

[0003] The main objective of this invention is to provide a surface difference adjustment fixture and method, which aims to provide a surface difference adjustment fixture capable of establishing the association between the hood and the front bumper mounting surface.

[0004] To achieve the above objectives, the present invention proposes a surface difference adjustment fixture for adjusting the surface difference between the front bumper and the hood. The surface difference adjustment fixture includes:

[0005] Base frame;

[0006] A mounting structure, disposed on the base frame, is used to mount the main body to the vehicle frame; and...

[0007] An adjusting member is disposed on the base frame. The adjusting member has a first abutting side and a second abutting side in the vertical direction. One of the first abutting side and the second abutting side is used to abut against the lower part of the hood, and the other is used to abut against the upper part of the front bumper bracket.

[0008] Optionally, the adjusting member includes a first portion and a second portion disposed on the base frame, wherein the first portion forms a first abutting side on the side opposite to the second portion in the vertical direction, and the second portion forms a second abutting side on the side opposite to the first portion in the vertical direction.

[0009] The first contact side is located above the second contact side.

[0010] Optionally, the base frame extends in a horizontal direction and has two ends in the horizontal direction;

[0011] The first division is configured in at least two parts, and the two first divisions are located near both ends of the base frame.

[0012] Optionally, the upper end of the first portion is inclined; and / or,

[0013] The first and / or second portions are arranged in a bent configuration.

[0014] Optionally, the mounting structure includes an elastic support member disposed on the base frame, the elastic support member extending vertically and being retractable in the vertical direction; and / or,

[0015] The mounting structure includes a positioning pin disposed on the base frame, the positioning pin being used to engage with process holes on the vehicle frame to position the base frame and the vehicle body.

[0016] Optionally, the base frame includes:

[0017] A main body extending along a first direction, the first portion being disposed on the main body; and,

[0018] A connecting portion extends along a second direction and is disposed on the main body portion, and the second portion is disposed on the connecting portion.

[0019] Optionally, at least two connecting portions are provided, and the two connecting portions are spaced apart on the main body portion along the first direction; two second portions are provided on the two connecting portions; and / or,

[0020] The connecting part is provided with a clamping member, which is used to cooperate with the second part to clamp the front bumper bracket.

[0021] Optionally, the mounting structure includes an elastic support member disposed on the base frame, the elastic support member extending vertically and being retractable in the vertical direction;

[0022] The elastic support is located at the end of the connecting portion away from the main body.

[0023] The present invention also proposes a surface difference adjustment method, wherein the surface difference adjustment method is applied to the above-mentioned surface difference adjustment fixture, the surface difference adjustment fixture comprising:

[0024] Base frame;

[0025] A mounting structure, disposed on the base frame, is used to mount the base frame to the vehicle frame; and...

[0026] An adjusting member is disposed on the base frame. The adjusting member has a first abutting side and a second abutting side in the vertical direction. One of the first abutting side and the second abutting side is used to abut against the lower part of the hood, and the other is used to abut against the upper part of the front bumper bracket.

[0027] The surface difference adjustment method includes:

[0028] The front bumper bracket is pre-installed on the front frame of the vehicle body;

[0029] The surface difference adjustment fixture is installed on the vehicle body so that during the closing of the hood, the first abutting side of the adjustment component can abut against the bottom of the hood, and the second abutting side can abut against the top of the front bumper bracket.

[0030] Close the hood to the designated position, so that the hood moves the front bumper bracket through the surface difference adjustment fixture;

[0031] After closing the hood to the designated position, secure the front bumper bracket.

[0032] Optionally, the steps prior to securing the front bumper bracket include:

[0033] Open the cover again;

[0034] Add or remove shims on the first abutting side and / or the second abutting side;

[0035] Close the cover again to the designated position.

[0036] In the technical solution of this invention, the mounting structure is set on the base frame, and the adjusting component is set on the base frame. The adjusting component has a first abutting side and a second abutting side in the vertical direction. The base frame is mounted on the vehicle frame through the mounting structure. After the front bumper bracket is pre-installed, the front cover is closed, so that one of the first abutting side and the second abutting side of the adjusting component abuts against the lower part of the hood, and the other abuts against the upper part of the hood, i.e., the front bumper mounting surface. In this way, the connection between the hood and the front bumper mounting surface can be established through the adjusting component. After the front bumper is installed on the front bumper mounting surface, the surface difference between the front bumper and the hood can meet the requirements, resulting in a high first-time assembly yield. Attached Figure Description

[0037] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the surface difference adjustment tooling provided by the present invention;

[0039] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0040] Figure 3 for Figure 1 A cross-sectional view of the intermediate elastic support component;

[0041] Figure 4 This is a schematic diagram of the assembly structure of the surface difference adjustment tooling and the body-in-white provided by the present invention.

[0042] Explanation of icon numbers:

[0043] 100 surface difference adjustment tooling 22 Positioning pin 1 Base frame 3 Adjustment parts 11 Main body 31 First Division 12 Connection part 32 Second Division 2 Installation structure 301 First contact side 21 elastic support 302 Second contact side 211 sleeve 4 Clamping parts 212 spring 200 frame 213 link 300 hood 214 support block 400 Front bumper bracket

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0047] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0048] To enhance the visual impact of car styling, an increasing number of models are adopting a wraparound front fascia structure, with the hood surrounded by the front bumper and fenders. These components have high matching requirements and no tolerance for error. Conventionally, during final assembly, the hood and front bumper are positioned independently, with no direct correlation between their outlines. Precision is transferred layer by layer through the body-in-white, front frame, and front bumper bracket, resulting in a long dimensional chain and a low first-time assembly pass rate.

[0049] To address the aforementioned issues, this invention proposes a surface difference adjustment fixture and method, aiming to provide a surface difference adjustment fixture capable of establishing the association between the hood and the front bumper mounting surface. Figures 1 to 3 This is a schematic diagram of an embodiment of the present invention.

[0050] Please refer to Figure 1 , Figure 2 and Figure 4 This invention proposes a surface difference adjustment fixture 100 for adjusting the surface difference between the front bumper and the hood 300. The surface difference adjustment fixture 100 includes a base frame 1, a mounting structure 2, and an adjustment component 3. The mounting structure 2 is disposed on the base frame 1 and is used to install the main body to the vehicle frame 200. The adjustment component 3 is disposed on the base frame 1 and has a first abutting side 301 and a second abutting side 302 in the vertical direction. One of the first abutting side 301 and the second abutting side 302 is used to abut against the lower part of the hood 300, and the other is used to abut against the upper part of the front bumper bracket 400.

[0051] In the technical solution of this invention, the mounting structure 2 is disposed on the base frame 1, and the adjusting member 3 is disposed on the base frame 1. The adjusting member 3 has a first abutting side 301 and a second abutting side 302 in the vertical direction. The base frame 1 is mounted on the vehicle frame 200 through the mounting structure 2. After the front bumper bracket 400 is pre-installed, the front cover is closed, so that one of the first abutting side 301 and the second abutting side 302 of the adjusting member 3 abuts against the lower part of the hood 300, and the other abuts against the upper part of the hood 300, i.e., the front bumper mounting surface. In this way, the connection between the hood 300 and the front bumper mounting surface can be established through the adjusting member 3. After the front bumper is installed on the front bumper mounting surface, the surface difference between the front bumper and the hood 300 can meet the requirements, resulting in a high first-time assembly yield.

[0052] When the front bumper bracket 400 is positioned too high, the surface difference adjustment fixture 100 may not be able to be installed onto the vehicle frame 200. To solve this problem, in an embodiment of the invention, the mounting structure 2 includes a positioning pin 22 disposed on the base frame 1. The positioning pin 22 is used to engage with a process hole on the vehicle frame 200 to position the base frame 1 relative to the vehicle body. Thus, the engagement of the positioning pin 22 with the process hole allows the base frame 1 to move up and down and to be positioned horizontally relative to the vehicle frame 200. When the front bumper bracket 400 is positioned too high, when installing the surface difference adjustment fixture 100, the second abutment side 302 of the adjusting member 3 can be directly placed above the front bumper bracket 400, and the positioning pin 22 can be inserted into the process hole to complete the installation.

[0053] The adjusting component 3 can be integral or separate. In order to adapt to the shape and installation position of the hood 300 and the front bumper bracket 400, in this embodiment, the adjusting component 3 includes a first portion 31 and a second portion 32 disposed on the base frame 1. The side of the first portion 31 opposite to the second portion 32 in the vertical direction forms the first abutting side 301, and the side of the second portion 32 opposite to the first portion 31 in the vertical direction forms the second abutting side 302. The first abutting side 301 is located above the second abutting side 302. In this way, the adjusting component 3 is separate, which can correspondingly place the first portion 31 and the second portion 32 in appropriate positions, and the overall weight is lower. The integral adjusting component 3 is more convenient to assemble with the base frame 1.

[0054] To ensure the stability of the contact between the first portion 31 and the cover 300 during the adjustment of surface differences, the base frame 1 extends horizontally and has two ends in the horizontal direction. At least two first portions 31 are provided, with the two first portions 31 respectively located near the two ends of the base frame 1. In this way, the two first portions 31 can support the cover 300 near the two ends, resulting in better support and less likelihood of displacement. The number of first portions 31 is not limited to two, but can be four or more.

[0055] In order to fit the shape of the cover 300, the upper end of the first portion 31 is inclined; in this way, the contact area between the cover 300 and the first portion 31 is larger, and it is not easy for local stress to cause deformation.

[0056] It is understood that the shapes of the hood 300 and the front bumper bracket 400 may deviate. When there is a deviation, shims need to be added or removed to correct the size. In order to better place the shims, in this embodiment, the first portion 31 and the second portion 32 are bent, so that the shims can be limited.

[0057] Since the mounting position of the base frame 1 and the vehicle frame 200 is closer to the interior than the front bumper bracket 400, in order for the second portion 32 to smoothly abut against the front bumper bracket 400, in this embodiment, the base frame 1 includes a main body 11 and a connecting portion 12. The main body 11 extends along a first direction, and the first portion 31 is disposed on the main body 11; the connecting portion 12 extends along a second direction and is disposed on the main body 11, and the second portion 32 is disposed on the connecting portion 12; wherein the first direction is the width direction of the vehicle body, and the second direction is the length direction of the vehicle body.

[0058] Typically, there are two front bumper brackets 400 used for installing the front bumper. In order to adjust the position of the two front bumper brackets 400 simultaneously, in this embodiment, at least two connecting parts 12 are provided. The two connecting parts 12 are spaced apart on the main body 11 along the first direction. There are two second parts 32, which are respectively provided on the two connecting parts 12. It should be noted that the connecting part 12 can also be provided as one, and the two second parts 32 can be connected by one connecting part 12, which makes the installation more convenient. The spaced two connecting parts 12 help to reduce the number of overall surface difference adjustment fixtures 100. In addition, the number of second parts 32 is not limited to two, but can also be four or more.

[0059] To prevent the second portion 32 from disengaging after contacting the front bumper bracket 400, a clamping member 4 is provided on the connecting portion 12. The clamping member 4 is used to cooperate with the second portion 32 to clamp the front bumper bracket 400.

[0060] This design does not limit the specific form of the clamping member 4; it can be threaded, pneumatic, or hydraulic.

[0061] To facilitate better vertical movement of the base frame 1 after installation, the diameter of the positioning pin 22 is set slightly smaller than the corresponding process hole. This reduces resistance during vertical movement. It is understood that if the diameter of the positioning pin 22 is too small, the base frame 1 is prone to misalignment, affecting subsequent adjustments to the surface difference between the front bumper and hood 300. Conversely, if the diameter of the positioning pin 22 is too large (i.e., the dimensional difference between the positioning pin 22 and the corresponding process hole is small), the process hole may jam the positioning pin 22, hindering the vertical movement of the base frame 1. Therefore, the diameter of the positioning pin 22 is set to be 1mm to 2mm smaller than the diameter of the corresponding process hole. Furthermore, the positioning structure is not limited to the positioning pin 22; the base frame 1 can also be installed on the vehicle frame 200 using a telescopic rod.

[0062] To prevent the adjusting member 3 from colliding with the hood 300 and the front bumper bracket 400 when the hood 300 is closed, thus avoiding damage to the hood 300 and the front bumper bracket 400, the mounting structure 2 further includes an elastic support member 21 disposed on the base frame 1. The elastic support member 21 extends vertically and is retractable in the vertical direction. Thus, the base frame 1 can abut against the vehicle frame 200 (e.g., a crash beam) via the elastic support member 21. In actual use, when the hood 300 is closed, the hood 300 contacts the first abutment side 301, subsequently driving the adjusting member... 3. The adjustment member 3 moves downward, descending until its second abutment side 302 abuts against the top of the front bumper bracket 400, until the hood 300 moves to the theoretically closed position. During this process, the elasticity of the elastic support member 21 can cause damage to the hood 300 due to excessive impact force when the hood 300 contacts the adjustment member 3, and can also cause damage to the front bumper bracket 400 when the adjustment member 3 contacts the front bumper bracket 400. This allows the overall surface difference adjustment fixture 100 to avoid the accumulation of tolerances caused by poor shape accuracy of the body-in-white mounting point, hood 300, and front bumper bracket 400.

[0063] In order to provide sufficient buffer space for the elastic support 21, in this embodiment, the elastic support 21 is disposed at the end of the connecting part 12 away from the main body part 11. With this arrangement, the elastic support 21 can extend to the outside of the hood 300 and the front bumper bracket 400, so that it can cooperate with the anti-collision beam and have sufficient buffer space.

[0064] For details, please refer to Figure 3 In this embodiment, the elastic support 21 includes a sleeve 211 fixedly connected to the connecting part 12. A spring 212 is provided inside the sleeve 211. One end of the spring 212 is fixed to the inner bottom wall of the sleeve 211, and the other end is fixedly connected to a connecting rod 213. The connecting rod 213 is slidably connected to the side wall of the sleeve 211, and a support block 214 is fixedly connected to the end away from the spring 212. The support block 214 is used to abut against the anti-collision beam, thereby providing support for the base frame 1.

[0065] Furthermore, in order to reduce the possibility of the support block 214 shifting during the movement of the base frame 1, the support block 214 is bent. This configuration allows the support block 214 to be secured to the anti-collision beam, reducing the possibility of it falling off or shifting.

[0066] Based on the aforementioned surface difference adjustment fixture 100, the present invention also proposes a surface difference adjustment method, comprising:

[0067] The front bumper bracket 400 is pre-installed on the front frame of the vehicle body;

[0068] The surface difference adjustment fixture 100 is installed on the vehicle body so that during the closing of the hood 300, the first abutting side 301 of the adjustment member 3 can abut against the lower part of the hood 300, and the second abutting side 302 can abut against the upper part of the front bumper bracket 400.

[0069] Close the hood 300 to the designated position, so that the hood 300 drives the front bumper bracket 400 to move through the surface difference adjustment fixture 100;

[0070] After closing the hood 300 to the designated position, fix the front bumper bracket 400.

[0071] In the technical solution of this embodiment, the size relationship between the hood 300 and the front bumper bracket 400 is established through the first abutting side 301 and the second abutting side 302 of the adjusting member 3. After the front bumper is installed on the front bumper bracket 400, the surface difference between it and the hood 300 can meet the requirements.

[0072] Because the hood 300 may have a vertical tolerance of 3mm, the installation position of the front bumper bracket 400 may be too high or too low, resulting in a large surface difference between the front bumper and the hood 300. In one embodiment, the steps before fixing the front bumper bracket 400 include:

[0073] Open the cover 300 again;

[0074] Add or remove shims to the first abutting side 301 and, or the second abutting side 302;

[0075] Close the cover 300 again to the designated position.

[0076] In the technical solution of this embodiment, when there is a deviation in the cover 300, the size can be corrected by adding or subtracting shims.

[0077] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A surface difference adjustment fixture, characterized in that, The surface difference adjustment fixture is used to adjust the surface difference between the front bumper and the hood, and includes: Base frame; A mounting structure, disposed on the base frame, is used to mount the base frame to the vehicle frame; and... An adjusting member is disposed on the base frame. The adjusting member has a first abutting side and a second abutting side in the vertical direction. One of the first abutting side and the second abutting side is used to abut against the lower part of the hood, and the other is used to abut against the upper part of the front bumper bracket. The adjusting member includes a first portion and a second portion disposed on the base frame. The first portion forms the first abutting side on the side opposite to the second portion in the vertical direction, and the second portion forms the second abutting side on the side opposite to the first portion in the vertical direction. Wherein, the first abutting side is located above the second abutting side; The base frame includes: A main body extending along a first direction, the first portion being disposed on the main body; and, A connecting portion extends along a second direction and is disposed on the main body portion, and the second portion is disposed on the connecting portion.

2. The surface difference adjustment fixture as described in claim 1, characterized in that, The base frame extends horizontally and has two ends in the horizontal direction; The first division is configured in at least two parts, and the two first divisions are located near both ends of the base frame.

3. The surface difference adjustment fixture as described in claim 1 or 2, characterized in that, The upper end of the first portion is inclined; and / or, The first and / or second portions are arranged in a bent configuration.

4. The surface difference adjustment fixture as described in claim 1, characterized in that, The mounting structure includes an elastic support member disposed on the base frame, the elastic support member extending vertically and being retractable vertically; and / or, The mounting structure includes a positioning pin disposed on the base frame, the positioning pin being used to engage with process holes on the vehicle frame to position the base frame and the vehicle body.

5. The surface difference adjustment fixture as described in claim 1, characterized in that, The connecting portion is provided in at least two parts, and the two connecting portions are spaced apart on the main body part along the first direction; the second portion is provided in two parts, and the two second portions are provided on the two connecting portions; and / or, The connecting part is provided with a clamping member, which is used to cooperate with the second part to clamp the front bumper bracket.

6. The surface difference adjustment fixture as described in claim 1, characterized in that, The installation structure includes an elastic support member disposed on the base frame, the elastic support member extending vertically and being retractable vertically; The elastic support is located at the end of the connecting portion away from the main body.

7. A method for adjusting surface differences, characterized in that, Applied to the surface difference adjustment fixture as described in any one of claims 1 to 6, the surface difference adjustment method includes: The front bumper bracket is pre-installed on the front frame of the vehicle body; The surface difference adjustment fixture is installed on the vehicle body so that during the closing of the hood, the first abutting side of the adjustment component can abut against the bottom of the hood, and the second abutting side can abut against the top of the front bumper bracket. Close the hood to the designated position, so that the hood moves the front bumper bracket through the surface difference adjustment fixture; After closing the hood to the designated position, secure the front bumper bracket.

8. The face difference adjustment method as described in claim 7, characterized in that, The steps prior to securing the front bumper bracket include: Open the cover again; Add or remove shims on the first abutting side and / or the second abutting side; Close the cover again to the designated position.

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