Method for adjusting camber of a tire during assembly and device for adjusting camber of a tire during assembly

Abstract

The application discloses a kind of adjustment methods of tire camber in assembly process, it is related to automobile assembly technical field, comprising the following steps: step one, the subframe assembly of preliminary assembly is placed on assembly platform by positioning assembly, step two, left knuckle shaft head upper bearing inner ring installation site and right knuckle shaft head upper bearing inner ring installation site are fixedly arranged on corresponding upper and lower V-shaped block assembly respectively, step three, height difference is adjusted, during adjustment, corresponding upper and lower V-shaped block assembly will be slightly left and right displacement on slide rail, step four, after pre-tightening, gap width is adjusted, during adjustment, corresponding upper and lower V-shaped block assembly will be slightly left and right displacement on slide rail, step five, locking is carried out;The application will not change camber during assembly adjustment process and after subsequent upper and lower V-shaped block assembly is removed, and during gap adjustment process, gap difference cannot be adjusted to less than 0.5mm due to internal stress.

Description

Technical Field

[0001] This invention relates to the field of automotive assembly technology, and in particular to a method and device for adjusting the camber angle of a tire during the assembly process. Background Technology

[0002] The camber angle of the suspension system, also known as the wheel camber angle or wheel tilt angle, is an important geometric parameter of the vehicle suspension system. The camber angle has a direct impact on the vehicle's handling performance, driving stability, tire wear, and vehicle alignment.

[0003] The camber angle of the tire is adjusted on the assembly platform during the assembly process. During operation, the initially assembled subframe assembly is first placed on the assembly platform using the positioning components. Then, after fixing the steering knuckle shaft end, the adjustment pivot heights of the left and right lower A-arms are adjusted accordingly. During the adjustment process, the entire system will undergo slight deformation, and there will be significant internal stress between the various linkages. When the upper and lower V-block assemblies are subsequently removed, the camber angle will change and may exceed the tolerance. Furthermore, during the clearance adjustment process, the internal stress prevents the clearance difference from being adjusted to less than 0.5mm. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art:

[0005] (1) During the adjustment process of the existing method, the entire system will undergo slight deformation, and there is a large internal stress between the rods. When the upper and lower V-block components are removed, the outward tilt angle will change and may exceed the tolerance.

[0006] (2) During the gap adjustment process, the gap difference could not be adjusted to less than 0.5mm due to internal stress.

[0007] A method and equipment for adjusting the tire camber angle during the assembly process are proposed.

[0008] To achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A method for adjusting the camber angle of a tire during assembly includes the following steps:

[0010] Step 1: Place the preliminarily assembled subframe assembly onto the assembly platform using the positioning components;

[0011] Step 2: Fix the bearing inner ring mounting positions on the left and right steering knuckle axle heads onto the corresponding upper and lower V-block assemblies respectively.

[0012] Step 3: Adjust the height difference. During the adjustment process, the corresponding upper and lower V-shaped block components will slightly shift left and right on the slide rail.

[0013] Step 4: After pre-tightening, adjust the gap width. During the adjustment process, the corresponding upper and lower V-shaped block components will slightly shift left and right on the slide rail.

[0014] Step 5: Lock the device.

[0015] As a further technical solution of the present invention, in step two, the bearing inner ring mounting positions on the left steering knuckle shaft head and the bearing inner ring mounting positions on the right steering knuckle shaft head are respectively placed on the corresponding lower V-blocks, and then V-blocks are installed on the two lower V-blocks respectively.

[0016] As a further technical solution of the present invention, in step two, the lower V-block and the corresponding upper V-block are locked together by a nut.

[0017] As a further technical solution of the present invention, in step three, a height gauge is used to measure the connection point height between the left support arm and the left upper A arm, the connection point height between the subframe body and the left upper A arm, the connection point height between the subframe body and the right upper A arm, and the connection point height between the right support arm and the right upper A arm, with the upper surface of the assembly platform as the reference surface. By adjusting the adjustment fulcrum height of the left lower A arm and the right lower A arm, the connection point heights between the left support arm and the left upper A arm, the subframe body and the left upper A arm, the subframe body and the right upper A arm, and the right support arm and the right upper A arm are all adjusted to the same height.

[0018] As a further technical solution of the present invention, in step four, the locking openings of the left upper A-arm, the left lower A-arm, the right upper A-arm, and the right lower A-arm are pre-tightened, and then the left and right clearance widths between each left upper A-arm and the corresponding mounting plate of the subframe body, the left and right clearance widths between each right upper A-arm and the corresponding mounting plate of the subframe body, the left and right clearance widths between each left lower A-arm and the corresponding mounting plate of the subframe body, and the left and right clearance widths between each right lower A-arm and the corresponding mounting plate of the subframe body are adjusted until the difference between each group is less than 0.5mm.

[0019] As a further technical solution of the present invention, in step five, the connection points of the left support arm and the left upper A arm, the right support arm and the right upper A arm, the left support arm and the left lower A arm, and the right support arm and the right lower A arm are locked, and then the locking openings of the left upper A arm, the left lower A arm, the right upper A arm, and the right lower A arm are locked.

[0020] A device for adjusting the camber angle of a tire during assembly includes an assembly platform for placing a subframe assembly. The assembly platform is characterized in that a positioning component is fixed on its upper end surface, and two upper and lower V-shaped block assemblies are symmetrically and movably arranged on the upper end surface of the assembly platform. Each upper and lower V-shaped block assembly is provided with a sliding unit between itself and the assembly platform.

[0021] Each of the upper and lower V-block components includes a lower V-block, and an upper V-block can be detachably mounted on the upper surface of each lower V-block.

[0022] Each of the lower V-blocks and upper V-blocks is locked together by a nut.

[0023] Each of the sliding units includes a slide rail fixed to the upper surface of the assembly platform, a slide block slidably disposed on each slide rail, and each lower V-block fixed to the upper surface of the corresponding slide block.

[0024] The beneficial effects of this invention are:

[0025] 1. Using a height gauge and taking the upper surface of the assembly platform as the reference plane, measure the connection point heights of the left support arm and the left upper A-arm, the subframe body and the left upper A-arm, the subframe body and the right upper A-arm, and the right support arm and the right upper A-arm. Ensure that the connection points of the subframe body and the left upper A-arm and the subframe body and the right upper A-arm are consistent. Adjust the heights of the adjustment fulcrums of the left lower A-arm and the right lower A-arm to align the connection points of the left support arm and the left upper A-arm, and the subframe body and the left upper A-arm. The connection point height, the connection point height between the subframe body and the right upper A-arm, and the connection point height between the right support arm and the right upper A-arm are adjusted to the same height. Since the bearing inner ring mounting positions on the left and right steering knuckle axle heads are fixed between the corresponding lower and upper V-blocks (the upper and lower V-block assemblies are set with an outward camber angle of 0.5°), the corresponding upper and lower V-block assemblies will have slight left and right displacement during the adjustment process. At the same time, the internal stress of each linkage is eliminated. The outward camber angle will not change during the entire assembly and adjustment process and after the upper and lower V-block assemblies are removed.

[0026] 2. Pre-tighten the locking openings of the left upper A-arm, left lower A-arm, right upper A-arm, and right lower A-arm. Then adjust the left and right clearance widths between each left upper A-arm and the corresponding mounting plate of the subframe body, the left and right clearance widths between each right upper A-arm and the corresponding mounting plate of the subframe body, the left and right clearance widths between each left lower A-arm and the corresponding mounting plate of the subframe body, and the left and right clearance widths between each right lower A-arm and the corresponding mounting plate of the subframe body until the difference between each group is less than 0.5mm (when the clearance difference is greater than 0.5mm, each left upper A-arm, each right upper A-arm, each left lower A-arm, and each right lower A-arm may make friction noise during movement). During the adjustment process, the corresponding upper and lower V-block components will have slight left and right displacement, which also eliminates the internal stress of each rod system. The internal stress will not prevent the clearance difference from being adjusted to less than 0.5mm, and the clearance difference will not change after adjustment. Attached Figure Description

[0027] Figure 1 This is a flowchart of the method of the present invention;

[0028] Figure 2 This is a schematic diagram showing the connection between the assembly platform and the slide rail in this invention;

[0029] Figure 3 for Figure 2 Sectional view along the RR line.

[0030] In the diagram: 1. Assembly platform; 2. Positioning component; 3. Lower V-block; 4. Upper V-block; 5. Slide rail; 6. Slide block; 7. Left steering knuckle; 8. Right steering knuckle; 9. Left support arm; 10. Left upper A-arm; 11. Subframe body; 12. Right upper A-arm; 13. Right support arm; 14. Left lower A-arm; 15. Right lower A-arm; 16. Upper and lower V-block components. Detailed Implementation

[0031] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0032] Reference Figures 1-3 A method for adjusting the camber angle of a tire during assembly includes the following steps:

[0033] Step 1: Place the preliminarily assembled subframe assembly onto the assembly platform 1 using positioning component 2;

[0034] Step 2: Fix the bearing inner ring mounting positions on the left steering knuckle 7 axle head and the right steering knuckle 8 axle head to the corresponding upper and lower V-block assemblies 16 respectively.

[0035] Step 3: Adjust the height difference. During the adjustment process, the corresponding upper and lower V-shaped block components 16 will slightly shift left and right on the slide rail 5.

[0036] Step 4: After pre-tightening, adjust the gap width. During the adjustment process, the corresponding upper and lower V-shaped block components 16 will slightly shift left and right on the slide rail 5.

[0037] Step 5: Lock the device.

[0038] In step two, the bearing inner ring mounting positions on the left steering knuckle 7 and the right steering knuckle 8 are placed on the corresponding lower V-blocks 3, and then V-blocks 4 are installed on the two lower V-blocks 3 respectively.

[0039] In step two, the lower V-block 3 and the corresponding upper V-block 4 are locked together by nuts.

[0040] In step three, using a height gauge with the upper surface of assembly platform 1 as the reference plane, measure the connection point heights of the left support arm 9 and the left upper A arm 10, the subframe body 11 and the left upper A arm 10, the subframe body 11 and the right upper A arm 12, and the right support arm 13 and the right upper A arm 12. By adjusting the adjustment fulcrum heights of the left lower A arm 14 and the right lower A arm 15, adjust all the connection point heights of the left support arm 9 and the left upper A arm 10, the subframe body 11 and the left upper A arm 10, the subframe body 11 and the right upper A arm 12, and the right support arm 13 and the right upper A arm 12 to the same height.

[0041] In step four, pre-tighten the locking openings of the left upper A-arm 10, left lower A-arm 14, right upper A-arm 12, and right lower A-arm 15. Then adjust the left and right clearance widths between each left upper A-arm 10 and the corresponding mounting plate of the subframe body 11, the left and right clearance widths between each right upper A-arm 12 and the corresponding mounting plate of the subframe body 11, the left and right clearance widths between each left lower A-arm 14 and the corresponding mounting plate of the subframe body 11, and the left and right clearance widths between each right lower A-arm 15 and the corresponding mounting plate of the subframe body 11, until the difference between each group is less than 0.5mm.

[0042] In step five, the connection points of the left support arm 9 and the left upper A arm 10, the right support arm 13 and the right upper A arm 12, the left support arm 9 and the left lower A arm 14, and the right support arm 13 and the right lower A arm 15 are locked. Then, the locking openings of the left upper A arm 10, the left lower A arm 14, the right upper A arm 12, and the right lower A arm 15 are locked.

[0043] The present invention also discloses a tire camber adjustment device during assembly, including an assembly platform 1 for placing a subframe assembly, a positioning component 2 fixed on the upper surface of the assembly platform 1 (the positioning component 2 is prior art), and two upper and lower V-shaped block components 16 symmetrically and movably arranged on the upper surface of the assembly platform 1, with a sliding unit provided between each upper and lower V-shaped block component 16 and the assembly platform 1.

[0044] Each upper and lower V-block assembly 16 includes a lower V-block 3, and an upper V-block 4 is detachably mounted on the upper end face of each lower V-block 3. Each lower V-block 3 and upper V-block 4 are locked together by a nut.

[0045] Each sliding unit includes a slide rail 5 fixed to the upper surface of the assembly platform 1, and a slide block 6 is slidably arranged on each slide rail 5. Each lower V-shaped block 3 is fixed to the upper surface of the corresponding slide block 6.

[0046] In use, the subframe assembly to be processed is placed on the assembly platform 1 through the positioning assembly 2. This operation is a conventional technical method. Then, the bearing inner ring mounting positions on the left steering knuckle 7 and the right steering knuckle 8 are respectively placed on the corresponding lower V-blocks 3 (the lower V-blocks 3 are set with an outward camber angle of 0.5°). Then, V-blocks 4 are installed on the two lower V-blocks 3 respectively, and the lower V-blocks 3 and the corresponding upper V-blocks 4 are locked with nuts.

[0047] Using a height gauge with the upper surface of assembly platform 1 as the reference plane, measure the connection point heights of the left support arm 9 and the left upper A arm 10, the subframe body 11 and the left upper A arm 10, the subframe body 11 and the right upper A arm 12, and the right support arm 13 and the right upper A arm 12. Ensure the connection points of the subframe body 11 and the left upper A arm 10 and the subframe body 11 and the right upper A arm 12 are consistent. Adjust the heights of the adjustment fulcrums of the left lower A arm 14 and the right lower A arm 15 to align the connection points of the left support arm 9 and the left upper A arm 10, and the subframe body 11 and the left upper A arm 12. The connection point heights of the upper A-arm 10, the subframe body 11 and the right upper A-arm 12, and the right support arm 13 and the right upper A-arm 12 are all adjusted to the same height. Since the bearing inner ring mounting positions on the left steering knuckle 7 and the right steering knuckle 8 are fixed between the corresponding lower V-block 3 and upper V-block 4 (the upper and lower V-block assemblies 16 are set with an outward tilt angle of 0.5°), the corresponding upper and lower V-block assemblies 16 will have slight left and right displacements during the adjustment process, which also eliminates the internal stress of each linkage. The outward tilt angle will not change during the entire assembly and adjustment process and after the upper and lower V-block assemblies 16 are removed.

[0048] Pre-tighten the locking openings of the left upper A-arm 10, left lower A-arm 14, right upper A-arm 12, and right lower A-arm 15. Then adjust the left and right clearance widths between each left upper A-arm 10 and the corresponding mounting plate of the subframe body 11, each right upper A-arm 12 and the corresponding mounting plate of the subframe body 11, each left lower A-arm 14 and the corresponding mounting plate of the subframe body 11, and each right lower A-arm 15 and the corresponding mounting plate of the subframe body 11, until the difference between each group is less than 0.5mm (when the clearance difference is greater than 0.5mm, each left upper A-arm 10, each right upper A-arm 12, each left lower A-arm 14, and each right lower A-arm 15 may cause friction noise during movement). During the adjustment process, the corresponding upper and lower V-block assemblies 16 will have slight left and right displacement, which also eliminates the internal stress of each rod system. The internal stress will not prevent the clearance difference from being adjusted to less than 0.5mm, and the clearance difference will not change after adjustment.

[0049] Tighten the connection points of the left support arm 9 with the left upper A arm 10, the right support arm 13 with the right upper A arm 12, the left support arm 9 with the left lower A arm 14, and the right support arm 13 with the right lower A arm 15. Then tighten the locking openings of the left upper A arm 10, the left lower A arm 14, the right upper A arm 12, and the right lower A arm 15. Each tightening should reach the required torque.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for adjusting the camber angle of a tire during assembly, characterized in that, Includes the following steps: Step 1: Place the pre-assembled subframe assembly onto the assembly platform (1) using the positioning component (2); Step 2: Fix the bearing inner ring mounting positions on the left steering knuckle (7) axle head and the bearing inner ring mounting positions on the right steering knuckle (8) axle head onto the corresponding upper and lower V-block assemblies (16); Step 3: Adjust the height difference. During the adjustment process, the corresponding upper and lower V-shaped block components (16) will move left and right on the slide rail (5). Step 4: After pre-tightening, adjust the gap width. During the adjustment process, the corresponding upper and lower V-shaped block components (16) will move left and right on the slide rail (5). Step 5: Tighten; In step three, using a height gauge with the upper surface of the assembly platform (1) as the reference surface, measure the connection point heights of the left support arm (9) and the left upper A arm (10), the subframe body (11) and the left upper A arm (10), the subframe body (11) and the right upper A arm (12), and the right support arm (13) and the right upper A arm (12). By adjusting the adjustment fulcrum heights of the left lower A arm (14) and the right lower A arm (15), adjust the connection point heights of the left support arm (9) and the left upper A arm (10), the subframe body (11) and the left upper A arm (10), the subframe body (11) and the right upper A arm (12), and the right support arm (13) and the right upper A arm (12) to the same height. In step four, the locking openings of the left upper A-arm (10), the left lower A-arm (14), the right upper A-arm (12), and the right lower A-arm (15) are pre-tightened. Then, the left and right gap widths of the corresponding mounting plates of each left upper A-arm (10) and the subframe body (11), the left and right gap widths of each right upper A-arm (12) and the subframe body (11), the left and right gap widths of each left lower A-arm (14) and the subframe body (11), and the left and right gap widths of each right lower A-arm (15) and the subframe body (11) are adjusted until the difference between the left and right gaps of each group is less than 0.5mm.

2. The method for adjusting the camber angle of a tire during assembly according to claim 1, characterized in that, In step two, the bearing inner ring mounting positions on the left steering knuckle (7) shaft head and the bearing inner ring mounting positions on the right steering knuckle (8) shaft head are respectively placed on the corresponding lower V-blocks (3), and then V-blocks (4) are installed on the two lower V-blocks (3) respectively.

3. The method for adjusting the camber angle of a tire during assembly according to claim 2, characterized in that, In step two, the lower V-block (3) and the corresponding upper V-block (4) are locked together by nuts.

4. The method for adjusting the camber angle of a tire during assembly according to claim 1, characterized in that, In step five, the connection points of the left support arm (9) and the left upper A arm (10), the right support arm (13) and the right upper A arm (12), the left support arm (9) and the left lower A arm (14), and the right support arm (13) and the right lower A arm (15) are locked. Then, the locking openings of the left upper A arm (10), the left lower A arm (14), the right upper A arm (12), and the right lower A arm (15) are locked.

5. A method for adjusting tire camber angle during assembly according to claim 1, comprising an assembly platform (1) for placing subframe components, characterized in that, The upper end face of the assembly platform (1) is fixed with a positioning component (2). The upper end face of the assembly platform (1) is symmetrically and movably provided with two upper and lower V-shaped block components (16). Each upper and lower V-shaped block component (16) is provided with a sliding unit between it and the assembly platform (1).

6. The method for adjusting the camber angle of a tire during assembly according to claim 5, characterized in that, Each of the upper and lower V-block components (16) includes a lower V-block (3), and an upper V-block (4) can be detachably provided on the upper end face of each lower V-block (3).

7. The method for adjusting the camber angle of a tire during assembly according to claim 6, characterized in that, Each of the lower V-block (3) and upper V-block (4) is locked together by a nut.

8. The method for adjusting the camber angle of a tire during assembly according to claim 5, characterized in that, Each of the sliding units includes a slide rail (5) fixed to the upper surface of the assembly platform (1), and a slide block (6) is slidably arranged on each slide rail (5). Each lower V-shaped block (3) is fixed to the upper surface of the corresponding slide block (6).

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