Suspension testing device and method for detecting assembly deviation

Abstract

The application relates to a suspension testing fixture and an assembly deviation detection method. The suspension testing fixture comprises a vehicle frame simulation piece, an axle target piece and a suspension simulation piece, and the suspension simulation piece is installed between the vehicle frame simulation piece and the axle target piece. The suspension simulation piece comprises a steel plate spring simulation piece, the steel plate spring simulation piece comprises a leaf spring, a hook and a first adjusting mechanism, the hook is connected with the vehicle frame simulation piece, the leaf spring is connected with the axle target piece, and the first adjusting mechanism is arranged between the leaf spring and the hook. The first adjusting mechanism is configured to adjust the positional relationship between the leaf spring and the hook, so as to change the shape of the steel plate spring simulation piece. In the suspension testing fixture, the steel plate spring simulation piece in the suspension simulation piece can change the relative positional relationship between the hook and the leaf spring by means of the first adjusting mechanism, so as to change the shape of the steel plate spring simulation piece, realize detection and analysis on the influence of the steel plate spring simulation piece in different deviation states on the assembly deviation, and improve the detection efficiency of the assembly deviation.

Description

Technical Field

[0001] This application relates to the field of inspection tool technology, and in particular to suspension inspection tools and assembly deviation detection methods. Background Technology

[0002] Leaf spring suspensions are widely used in commercial vehicles, and their assembly precision is closely related to vehicle performance. Considering manufacturing costs, the tolerances for suspension components, especially leaf springs, are designed to be relatively lenient. During the assembly of these components into the rear suspension assembly, the accumulation of deviations is unavoidable, potentially leading to quality defects such as out-of-tolerance issues after assembly. Some inspection tools in related technologies are unable to simulate multiple dimensional deviations of the same part, resulting in low efficiency in deviation detection. Summary of the Invention

[0003] Based on this, a suspension fixture is provided that can detect assembly deviations of leaf springs, so as to analyze the dimensional deviations of the suspension and improve the detection efficiency of assembly deviations.

[0004] In one aspect, this application provides a suspension fixture, the suspension fixture comprising a vehicle frame simulation component, an axle target component, and a suspension simulation component; the suspension simulation component is installed between the vehicle frame simulation component and the axle target component;

[0005] The suspension simulator includes a leaf spring simulator, which includes a leaf spring, a coil arm, and a first adjustment mechanism.

[0006] The coiled ear is connected to the vehicle frame simulation component, and the leaf spring is connected to the axle target component;

[0007] The first adjustment mechanism is located between the leaf spring and the coil lug;

[0008] The first adjustment mechanism is configured to adjust the positional relationship between the leaf spring and the lug to change the shape of the leaf spring simulator.

[0009] In one embodiment, the first adjustment mechanism includes a first guide member; the first guide member is connected to the leaf spring, and the lug is configured to move relative to the first guide member in a first direction to change the chord length of the leaf spring simulator; and / or

[0010] The first adjustment mechanism includes a second guide member; the second guide member is connected to the leaf spring, and the lug is configured to move relative to the second guide member in a second direction to change the lateral bending of the leaf spring simulator; and / or

[0011] The first adjustment mechanism includes an adjustment member disposed between the lug and the leaf spring; the adjustment member is configured to adjust the distance between the lug and the leaf spring in a third direction to change the arc height of the leaf spring simulation member.

[0012] In one embodiment, the target axle component is an axle simulation component or an axle component to be tested;

[0013] The suspension simulator can be replaced with the suspension test component.

[0014] In one embodiment, the suspension simulator includes a bracket assembly simulator connected between the vehicle frame simulator and the leaf spring target component; the leaf spring target component is the leaf spring simulator or the leaf spring test piece; or

[0015] The suspension test component includes a bracket assembly test component; the bracket assembly test component is connected between the vehicle frame simulation component and the leaf spring target component; the leaf spring target component is either the leaf spring simulation component or the leaf spring test component.

[0016] In one embodiment, the suspension simulator includes a suspension ring simulator; the suspension ring simulator is connected between the vehicle frame simulator and the leaf spring target component; the leaf spring target component is the leaf spring simulator or the leaf spring test piece; or

[0017] The suspension test component includes a suspension ring test component; the suspension ring test component is connected between the vehicle frame simulation component and the leaf spring target component; the leaf spring target component is either the leaf spring simulation component or the leaf spring test component.

[0018] In one embodiment, the suspension simulator includes a shock absorber bracket simulator connected between the axle target and the leaf spring target; the axle target is an axle simulator or an axle under test, and the leaf spring target is the leaf spring simulator or the leaf spring under test; or

[0019] The suspension test component includes a shock absorber bracket test component, which is connected between the axle target component and the leaf spring target component; the axle target component is an axle simulation component or an axle test component, and the leaf spring target component is the leaf spring simulation component or the leaf spring test component.

[0020] In one embodiment, the axle simulator includes an axle body simulator, a flange simulator, and a second adjustment mechanism;

[0021] The second adjustment mechanism is located between the axle body simulation component and the flange simulation component;

[0022] The flange simulator can be rotated relative to the axle body simulator by means of the second adjustment mechanism to be adjusted to a preset angle.

[0023] Another aspect of this application provides a method for detecting assembly deviations, the method comprising:

[0024] The suspension simulator is assembled into a preset position on the frame simulator in the suspension fixture; the suspension simulator includes a leaf spring simulator; the leaf spring simulator includes a leaf spring, a coil lug, and a first adjustment mechanism, the first adjustment mechanism being configured to adjust the positional relationship between the leaf spring and the coil lug to change the shape of the leaf spring simulator;

[0025] The target axle component is assembled onto the suspension simulation component;

[0026] Assembly deviations are determined based on the suspension fixture.

[0027] In one embodiment, before determining the assembly deviation based on the suspension gauge, the step further includes:

[0028] Replace the suspension simulator with the suspension test component.

[0029] In one embodiment, replacing the suspension simulator with the suspension test component specifically includes:

[0030] Replace the bracket assembly simulation component in the suspension simulation component with the bracket assembly under test; and / or

[0031] Replace the suspension simulation component with the suspension test component; and / or

[0032] Replace the shock absorber bracket simulation component in the suspension simulation component with the shock absorber bracket under test; and / or

[0033] Replace the leaf spring simulator in the suspension simulator with the leaf spring test piece.

[0034] The aforementioned suspension fixture and assembly deviation detection method include a suspension fixture comprising at least a frame simulator, an axle target component, and a suspension simulator. The leaf spring simulator within the suspension simulator can change the relative positional relationship between the leaf spring and the coil arm via a first adjustment mechanism, thereby altering the shape of the leaf spring simulator. This allows for the detection and analysis of the influence of the leaf spring simulator under different deviation states on assembly deviations, improving the efficiency of assembly deviation detection. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a suspension gauge according to an embodiment of this application;

[0036] Figure 2This is a cross-sectional view of point M in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the structure of the first adjusting mechanism according to an embodiment of this application;

[0038] Figure 4 This is an exploded view of the first adjusting mechanism according to an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the structure of a front support simulation component according to an embodiment of this application;

[0040] Figure 6 This is a schematic diagram of the structure of the second adjustment mechanism according to an embodiment of this application;

[0041] Figure 7 This is a schematic flowchart of an assembly deviation detection method according to an embodiment of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Suspension inspection fixture;

[0044] 110. Chassis simulation component; 111. Spherical surface; 112. Reference block;

[0045] 120. Axle simulation component; 121. Axle body simulation component; 122. Flange simulation component; 122A. First center hole; 123. Second adjustment mechanism; 1231. Adjustment body; 1232. Kingpin; 1232A. Second center hole; 1233. Connecting plate; 1233A. Arc-shaped hole; 124. Steering knuckle simulation component;

[0046] 130. Suspension simulator; 131. Leaf spring simulator; 1311. Leaf spring; 1312. Coil; 1312A. First oblong hole; 1313. First adjustment mechanism; 1313A. First guide; a1. First guide groove; a2. Second oblong hole; 1313B. Second guide; b. Second guide groove; 1313C. Adjustment component; 1313D. First connector; 1313E. Second connector; 1313F. First mounting component; 1313G. Second mounting component; 132. Bracket assembly simulator; 1321. Front bracket simulator; 1321A. Bushing; 1321B. Set screw; 1322. Rear bracket simulator; 133. Hanging ring simulator; 134. Shock absorber bracket simulator; 135. U-bolt;

[0047] 140. Mounting bracket; 141. Guide plate; 142. Mounting bracket; 143. Mounting plate;

[0048] 150. Bolt assembly; 151. Washer; 152. Stud; 153. Nut;

[0049] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0051] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0056] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0057] To facilitate understanding of the technical solution of this application, before proceeding with a detailed explanation, the suspension gauge in the relevant technology will be described first.

[0058] Most domestic automakers need to control the dimensional accuracy of leaf spring suspensions by focusing on the manufacturing precision of components. Considering manufacturing costs, component tolerances are often designed to be relatively lenient. However, after assembly, the accumulation of deviations is unavoidable and can easily lead to out-of-tolerance issues. Currently, out-of-tolerance issues are difficult to manage effectively, making it difficult to guarantee the quality of assembly and to understand the impact of each component on the assembly. Therefore, it is difficult to solve these problems by optimizing dimensional chain tolerances. The inventors attempted to develop a fixture; however, the fixture cannot simulate dimensional deviations, requiring the manufacture or selection of samples with one or more deviation states during dimensional analysis. This process necessitates repeated disassembly and reassembly of the suspension. Compared to passenger cars, commercial vehicle suspension components are larger and heavier, significantly increasing the difficulty of disassembly and reassembly. Furthermore, the measurement of wheel alignment parameters typically relies on dedicated four-wheel alignment equipment, making it difficult to use general-purpose fixtures.

[0059] Based on this, the inventors conducted in-depth research and improved the structure of the suspension inspection tool and the method for detecting deviations, enabling the detection and analysis of the influence of leaf spring simulation parts under different deviation states on assembly deviations, thereby improving the detection efficiency of assembly deviations.

[0060] For ease of description, the accompanying drawings only show structures relevant to embodiments of this application.

[0061] Figure 1 A schematic diagram of the structure of a suspension gauge 100 according to an embodiment of this application is shown; Figure 2 A cross-sectional schematic diagram at point M is shown in one embodiment of this application; Figure 3 A schematic diagram of the structure of the first adjustment mechanism 1313 according to an embodiment of this application is shown.

[0062] See Figure 1 and combined Figure 2 and Figure 3 An embodiment of this application provides a suspension fixture 100, including a frame simulator 110, an axle target component, and a suspension simulator 130. The suspension simulator 130 is installed between the frame simulator 110 and the axle target component. The suspension simulator 130 includes a leaf spring simulator 131, which includes a leaf spring 1311, a coil arm 1312, and a first adjustment mechanism 1313. The coil arm 1312 is connected to the frame simulator 110, and the leaf spring 1311 is connected to the axle target component. The first adjustment mechanism 1313 is disposed between the leaf spring 1311 and the coil arm 1312. The first adjustment mechanism 1313 is configured to adjust the positional relationship between the leaf spring 1311 and the coil arm 1312 to change the shape of the leaf spring simulator 131.

[0063] The suspension fixture 100 provided in this application embodiment includes at least a frame simulation component 110, an axle target component, and a suspension simulation component 130. The leaf spring simulation component 131 within the suspension simulation component 130 can change the relative positional relationship between the coil lug 1312 and the leaf spring 1311 via a first adjustment mechanism 1313, thereby altering the shape of the leaf spring simulation component 131. This allows for the detection and analysis of the influence of the leaf spring simulation component 131 under different deviation states on assembly deviations, improving the detection efficiency of assembly deviations.

[0064] Continue reading Figure 1In some embodiments, the suspension fixture 100 further includes a mounting bracket 140 on which the frame simulator 110 is mounted. The mounting bracket 140 is mounted on a flat surface, such as the ground, to ensure the stability of the suspension fixture 100. The mounting bracket 140 is provided with a guide plate 141 to guide the installation of the frame simulator 110, thereby reducing the occurrence of collisions. Specifically, the mounting bracket 140 and the frame simulator 110 are fixedly connected by a bolt assembly 150. The frame simulator 110 has a spherical surface 111 machined on it to mate with the washer 151 in the bolt assembly 150. When the frame simulator 110 is leveled, the installation error of the stud 152 in the bolt assembly 150 in the vertical direction can also be eliminated, ensuring that the nut 153 in the bolt assembly 150 is reliably locked and fixed.

[0065] Furthermore, mounting bracket 142 and mounting plate 143 are mounted on mounting frame 140. In conjunction with some embodiments described later, mounting bracket 142 provides a mounting point for the front support simulation 1321 in the leaf spring simulation 131, and mounting plate 143 provides a mounting point for the rear support simulation 1322. By changing the dimensions and structure of mounting bracket 142 and mounting plate 143, or by replacing them, different mounting points can be provided for the leaf spring target component, improving versatility.

[0066] Figure 4 An exploded view of a first adjustment mechanism 1313 according to an embodiment of this application is shown.

[0067] like Figure 4 As shown, combined with Figure 3In some embodiments, the first adjustment mechanism 1313 includes a first guide member 1313A connected to the leaf spring 1311. The lug 1312 is configured to move relative to the first guide member 1313A along a first direction X to change the chord length of the leaf spring simulator 131. Changing the chord length of the leaf spring simulator 131 by means of the first guide member 1313A simulates the chord length under different deviation states. Specifically, the first guide member 1313A has a first guide groove a1, and the lug 1312 is slidably connected to the first guide groove a1 along the first direction X. Furthermore, the first adjustment mechanism 1313 also includes a first connecting member 1313D. In conjunction with some embodiments described later, the first adjustment mechanism 1313 further includes a first mounting member 1313F connected to the second guide member 1313B. The first connecting member 1313D passes through the first mounting member 1313F and is threadedly connected to the lug 1312. The lug 1312 can slide relative to the first guide groove a1 under the rotational action of the first connecting member 1313D, thereby adjusting the positional relationship between the lug 1312 and the leaf spring 1311 in the first direction X to simulate the chord length under different deviation states. Furthermore, the lug 1312 has a first oblong hole 1312A, which, with the aid of bolts and the first oblong hole 1312A, allows the lug 1312 to be locked and fixed after adjustment.

[0068] In some embodiments, the first adjustment mechanism 1313 includes a second guide member 1313B connected to the leaf spring 1311. The lug 1312 is configured to move relative to the second guide member 1313B along a second direction Y to change the lateral bending of the leaf spring simulator 131. The second guide member 1313B can simulate the lateral bending deviation of the leaf spring simulator 131 under different deviation states. Thus, by means of the second guide member 1313B, the distance between the lug 1312 and the leaf spring 1311 in the second direction Y can be changed, thereby changing the lateral bending. In conjunction with the foregoing embodiments, the second guide member 1313B has a second guide groove b, and a first guide member 1313A is installed in the second guide groove b, and the first guide member 1313A is slidably connected to the second guide groove b along the second direction Y. Furthermore, the first adjustment mechanism 1313 also includes a second connecting member 1313E and a second mounting member 1313G connected to the second guide member 1313B. The second connecting member 1313E passes through the second mounting member 1313G and is threadedly connected to the first guide member 1313A. The first guide member 1313A can slide relative to the second guide groove b under the rotation of the second connecting member 1313E, thereby adjusting the positional relationship between the coil ear 1312 and the leaf spring 1311 in the second direction Y to simulate lateral bending under different deviation states. Furthermore, the first guide member 1313A has a second oblong hole a2, which, with the aid of bolts and the second oblong hole a2, can lock and fix the first guide member 1313A and the second guide member 1313B after adjustment.

[0069] In some embodiments, the first adjustment mechanism 1313 includes an adjustment member 1313C disposed between the lug 1312 and the leaf spring 1311. The adjustment member 1313C is configured to adjust the distance between the lug 1312 and the leaf spring 1311 in the third direction Z to change the arc height of the leaf spring simulation member 131. Thus, the adjustment member 1313C can simulate arc height deviations under different conditions. In conjunction with some of the foregoing embodiments, the adjustment member 1313C is disposed between the second guide member 1313B and the leaf spring 1311. Exemplarily, the adjustment member 1313C can be a shim, and the thickness of the shim can be adjusted to simulate arc heights under different conditions.

[0070] In this system, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Understanding this, the first direction X is the front-back direction, the second direction Y is the left-right direction, and the third direction Z is the up-down direction.

[0071] As a traditional elastic element in automotive suspension systems, leaf springs bear the weight of the vehicle and its loads, operating under harsh conditions. Significant deviations in the assembly of leaf springs directly impact vehicle handling, ride comfort, and safety. The first adjustment mechanism 1313 simulates deviations in the chord length, lateral bending, and arc height of the leaf spring under different conditions. This allows for adjustment of only the chord length, lateral bending, or arc height, or various combinations thereof to simulate different states. The adjustment amount can be adjusted according to actual conditions, such as simulating deviations under extreme environments to improve suspension assembly precision and ultimately enhance overall vehicle performance.

[0072] In some embodiments, the target axle component is an axle simulator 120 or an axle test component, and the suspension simulator 130 can be replaced with the suspension test component. Thus, by replacing the axle simulator 120 with the axle test component, the effect of the axle test component's deviation on the assembly can be measured. Similarly, replacing the suspension test component can reveal the effect of the suspension test component's deviation. It should be noted that the suspension simulator 130 in this application includes numerous parts; replacing at least one of these parts with the corresponding test component constitutes replacing the suspension simulator 130 with the suspension test component.

[0073] In some embodiments, the suspension simulator 130 includes a bracket assembly simulator 132 connected between the frame simulator 110 and the leaf spring target component. The leaf spring target component is either the leaf spring simulator 131 or the leaf spring test component. Alternatively, the suspension test component includes a bracket assembly test component connected between the frame simulator 110 and the leaf spring target component. The leaf spring target component is either the leaf spring simulator 131 or the leaf spring test component. Thus, by replacing the bracket assembly simulator 132, the assembly deviation of the bracket assembly test component can be determined.

[0074] It should be noted that the bracket assembly simulation 132 includes a front bracket simulation 1321 and a rear bracket simulation 1322. Correspondingly, the bracket assembly test piece includes a front bracket test piece and a rear bracket test piece. The front bracket simulation 1321 or the front bracket test piece is connected between the leaf spring target piece and the frame simulation 110. In conjunction with some of the foregoing embodiments, the front bracket simulation 1321 or the front bracket test piece is connected between the leaf spring target piece and the mounting bracket 142. The rear bracket simulation 1322 or the rear bracket test piece is connected between the leaf spring target piece and the frame simulation 110. In conjunction with some of the embodiments described above, the rear bracket simulation 1322 or the rear bracket test piece is connected between the lifting ring target piece and the mounting plate 143.

[0075] It should also be noted that during replacement, the assembly deviation of a single part, that is, the impact of the manufacturing error of a single part on the assembly, can be determined by replacing any one of them. Alternatively, all parts can be replaced to determine the assembly deviation of the entire bracket assembly. This will not be elaborated further.

[0076] Figure 5 A schematic diagram of the structure of a front support simulation component 1321 according to an embodiment of this application is shown.

[0077] like Figure 5 As shown, in some specific embodiments, the front support simulation component 1321 is also provided with a bushing 1321A. By adjusting the distance between the two bushings 1321A, different opening widths at the assembly point of the front support simulation component 1321 and the rolling ear 1312 can be simulated. The bushing 1321A can be fixed by means of a set screw 1321B. At the same time, by adjusting the two bushings 1321A to the left or to the right simultaneously, the lateral bending can be adjusted, which can replace the lateral bending adjustment method of the second guide component 1313B. In conjunction with some embodiments described later, the bushing 1321A can also be provided on the lifting ring simulation component 133 to meet different needs, and no limitation is made here.

[0078] See again Figure 1 In some embodiments, the suspension simulator 130 includes a suspension ring simulator 133 connected between the frame simulator 110 and the leaf spring target component. The leaf spring target component is either the leaf spring simulator 131 or the leaf spring test component. Alternatively, the suspension test component includes a suspension ring test component connected between the frame simulator 110 and the leaf spring target component. The leaf spring target component is either the leaf spring simulator 131 or the leaf spring test component. Thus, assembly deviations of the suspension ring test component can be determined by replacing the suspension ring simulator 133.

[0079] See Figure 1 In some embodiments, the suspension simulator 130 includes a shock absorber bracket simulator 134 connected between the axle target component and the leaf spring target component. The axle target component is either the axle simulator 120 or the axle test component, and the leaf spring target component is either the leaf spring simulator 131 or the leaf spring test component. Alternatively, the suspension test component includes a shock absorber bracket test component connected between the axle target component and the leaf spring target component. The axle target component is either the axle simulator 120 or the axle test component, and the leaf spring target component is either the leaf spring simulator 131 or the leaf spring test component. Thus, by replacing the shock absorber bracket simulator 134, the assembly deviation of the shock absorber bracket test component can be determined, and by replacing the axle simulator 120, the assembly deviation of the axle test component can be determined.

[0080] Figure 6A schematic diagram of the structure of the second adjustment mechanism 123 according to an embodiment of this application is shown;

[0081] like Figure 6 As shown, combined with Figure 1 In some embodiments, the axle simulator 120 includes an axle body simulator 121, a flange simulator 122, and a second adjustment mechanism 123, which is disposed between the axle body simulator 121 and the flange simulator 122. The flange simulator 122 can be rotated relative to the axle body simulator 121 by means of the second adjustment mechanism 123 to be adjusted to a preset angle. The flange simulator 122 is used to mount a wheel, and it can be understood that adjusting the rotation angle of the flange simulator 122 represents the rotation angle of the wheel. The flange simulator 122 has a first center hole 122A and a rim mounting surface for mounting the wheel. The wheel camber angle can be obtained by measuring the first center hole 122A and the rim mounting surface.

[0082] Furthermore, the axle simulation component 120 also includes a steering knuckle simulation component 124 connected between the flange simulation component 122 and the second adjustment mechanism 123. The second adjustment mechanism 123 includes an adjustment body 1231 and a kingpin 1232. The adjustment body 1231 is connected between the steering knuckle simulation component 124 and the axle body simulation component 121. The kingpin 1232 passes through the adjustment body 1231 and the steering knuckle simulation component 124, so that the steering knuckle simulation component 124 can rotate relative to the axle simulation component 120 about the axis of rotation of the kingpin 1232, thereby adjusting the wheel angle and wheel toe-in. Furthermore, the second adjustment mechanism 123 also includes a connecting plate 1233. The connecting plate 1233 has an arc-shaped hole 1233A. By means of a clamping screw cooperating with the arc-shaped hole 1233A, the steering knuckle simulation component 124 can be locked and fixed to the adjustment body 1231 after the steering knuckle simulation component 124 is rotated to a preset angle. It should be noted that the two ends of the kingpin 1232 are provided with second center holes 1232A. By measuring the two second center holes 1232A, the axis of the kingpin 1232 can be obtained, and thus the back tilt angle and the inclination angle of the kingpin 1232 can be determined.

[0083] Figure 7 A schematic flowchart of an assembly deviation detection method according to an embodiment of this application is shown.

[0084] like Figure 7 As shown, combined with Figure 1 In another aspect, this application also provides a method for detecting assembly deviations, the method comprising:

[0085] S110. Assemble the suspension simulation component 130 onto a preset position on the frame simulation component 110 in the suspension fixture 100; the suspension simulation component 130 includes a leaf spring simulation component 131; the leaf spring simulation component 131 includes a leaf spring 1311, a coil lug 1312 and a first adjustment mechanism 1313, the first adjustment mechanism 1313 being configured to adjust the positional relationship between the leaf spring 1311 and the coil lug 1312 to change the shape of the leaf spring simulation component 131;

[0086] S120. Assemble the target axle component onto the suspension simulation component 130.

[0087] S130, Determine assembly deviations based on suspension fixture 100.

[0088] In step S110, by changing the shape of the leaf spring simulator 131, the effects of different deviation states can be simulated. In conjunction with some of the foregoing embodiments, specifically, at least one of the arc length, lateral bending, and arc height of the leaf spring simulator 131 is changed by the first adjustment mechanism 1313.

[0089] In step S120, the target axle component is either the axle simulation component 120 or the axle component to be tested.

[0090] In some embodiments, before step S130, a reference coordinate system is established based on the chassis simulation component 110. Specifically, the chassis simulation component 110 has multiple reference blocks 112 along its circumference, and all reference blocks 112 are coplanar to form a reference plane. The reference plane and the third direction Z jointly establish a coordinate system. In this way, the three-dimensional coordinates of each part can be determined, thereby improving the accuracy and ease of deviation determination.

[0091] Further, the suspension simulator 130 and axle simulator 120 are sequentially installed onto the frame simulator 110 to determine the theoretical three-dimensional coordinates of each component. Specifically, based on the reference coordinate system, the theoretical three-dimensional coordinates of the first center hole 122A of the flange simulator 122 on the axle simulator 120 are determined. After replacing the component, the actual three-dimensional coordinates of the first center hole 122A can be determined, and the assembly deviation can be determined based on the theoretical and actual three-dimensional coordinates. It should be noted that when the flange simulator 122 in the axle simulator 120 is replaced with a flange under test, the actual three-dimensional coordinates can be determined through the corresponding center hole on the flange under test.

[0092] In some embodiments, before step S130, a step of replacing the suspension simulator 130 with the suspension test component is included. It is understood that when the suspension simulator 130 is replaced with the suspension test component, and the target axle component is the axle simulator 120, the assembly deviation of the suspension test component can be measured. Similarly, when only the axle simulator 120 is replaced with the axle test component, the assembly deviation of the axle test component can be measured. When all components are replaced with test components, the cumulative effect of each component during the assembly process on the assembly can be determined, thereby determining the assembly accuracy.

[0093] In some embodiments, the suspension simulator 130 is replaced with a suspension test piece, specifically including replacing the bracket assembly simulator 132 in the suspension simulator 130 with a bracket assembly test piece; and / or, replacing the suspension ring simulator 133 in the suspension simulator 130 with a suspension ring test piece; and / or, replacing the shock absorber bracket simulator 134 in the suspension simulator 130 with a shock absorber bracket test piece; and / or, replacing the leaf spring simulator 131 in the suspension simulator 130 with a leaf spring test piece. Thus, when only the bracket assembly test piece is replaced, the deviation of the bracket assembly test piece can be measured. When only the suspension ring test piece is replaced, the deviation of the suspension ring test piece can be measured. When only the shock absorber bracket test piece is replaced, the deviation of the shock absorber bracket test piece can be measured. When only the leaf spring test piece is replaced, the deviation of the leaf spring test piece can be measured. When all the above parts are replaced, the cumulative deviation during step-by-step installation can be determined, as well as the degree of influence of the deviation of each part on the assembly.

[0094] For example, in conjunction with some of the foregoing embodiments, the influence of manufacturing deviations of the front bracket test piece on assembly deviations will be explained. After the frame simulation piece 110 is mounted on the mounting bracket 140 and leveled, a reference coordinate system is established using the reference block 112 on the frame simulation piece 110 to determine the theoretical three-dimensional coordinates of the first positioning hole on the flange simulation piece 122. During the test, the front bracket test piece is mounted on the mounting bracket 142, the rear bracket simulation piece 1322 is mounted on the mounting plate 143, the lifting ring simulation piece 133 is mounted on the rear bracket simulation piece 1322 by means of leaf spring pins, the two end loops 1312 of the leaf spring simulation piece 131 are mounted on the front bracket test piece and the lifting ring simulation piece 133 by means of leaf spring pins, and then the cover plate simulation piece, leaf spring 1311, and shock absorber lower bracket simulation piece are connected to the axle simulation piece 120 by means of U-bolts 135 and nuts. The wheel angle is adjusted to achieve symmetry using the second adjustment mechanism 123, and the clamping screws are tightened after the wheel toe-in requirements are met. By measuring the first center hole 122A of the flange simulation 122 on the axle simulation 120, the wheel alignment parameters, and the functional dimensions of the suspension simulation 130, the influence of manufacturing deviations of the front bracket test piece on assembly can be determined. By adjusting the chord length, arc height, and lateral bending of the leaf spring simulation 131 using the first adjustment mechanism 1313, the influence of manufacturing deviations of the leaf spring simulation 131 on assembly can be determined through the first center hole 122A. Similarly, by replacing the axle simulation 120 with the axle test piece, the influence of manufacturing deviations of the axle test piece can be measured.

[0095] For example, in conjunction with some of the foregoing embodiments, the influence of the cumulative effect of manufacturing deviations on assembly deviations will be explained. A front support test piece and a rear support test piece are assembled on a chassis simulator 110. A reference coordinate system is determined using a reference block 112. A lifting ring test piece is installed using a leaf spring pin, and a leaf spring test piece is installed onto the front support test piece and the lifting ring test piece. The cover plate simulator, the leaf spring test piece, and the shock absorber lower support test piece are fixed to the axle test piece using U-bolts 135 and nuts, completing the assembly. The influence of manufacturing deviations on the assembly can be determined using the flange test piece on the axle test piece.

[0096] The suspension fixture 100 and assembly deviation detection method provided in this application include at least a frame simulation component 110, an axle target component, and a suspension simulation component 130. The leaf spring simulation component 131 within the suspension simulation component 130 can change the relative positional relationship between the coil lug 1312 and the leaf spring 1311 via a first adjustment mechanism 1313, thereby altering the shape of the leaf spring simulation component 131. This allows for the detection and analysis of the influence of the leaf spring simulation component 131 under different deviation states on assembly deviations, improving the detection efficiency of assembly deviations. Furthermore, by replacing individual parts, the impact of the manufacturing deviation of a single part on the assembly can be determined; by replacing all parts, the cumulative effect of the manufacturing deviations of the parts on the assembly can be determined.

[0097] It should be noted that the technical solutions described above can be implemented as independent embodiments or combined with each other as combined embodiments in actual implementation. The technical solutions described above are exemplary solutions, and the specific combination for implementation can be selected according to actual needs; this application does not impose specific limitations. Furthermore, the description of the embodiments of this application is based solely on the idea of ​​convenient explanation, and different embodiments are described in a corresponding order, such as according to the preset order required in the actual implementation process, rather than limiting the execution order between different embodiments. Accordingly, in actual implementation, if multiple embodiments provided by this application need to be implemented, it is not necessary to follow the execution order provided when describing the embodiments in this invention; instead, the execution order between different embodiments can be arranged according to needs.

[0098] It should be understood that, although Figure 7 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 7 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A suspension tester characterized by, The suspension testing device comprises a vehicle frame simulation part, an axle target part and a suspension simulation part; the suspension simulation part is installed between the vehicle frame simulation part and the axle target part; The suspension simulation part comprises a leaf spring simulation part; the leaf spring simulation part comprises a leaf spring, a winding ear and a first adjusting mechanism; The winding ear is connected with the vehicle frame simulation part, and the leaf spring is connected with the axle target part; The first adjusting mechanism is arranged between the leaf spring and the winding ear; The first adjusting mechanism is configured to adjust the positional relationship between the leaf spring and the winding ear, so as to change the shape of the leaf spring simulation part; the first adjusting mechanism comprises a first guide part; the first guide part is connected with the leaf spring, and the winding ear is configured to move along a first direction relative to the first guide part, so as to change the chord length of the leaf spring simulation part; and / or The first adjusting mechanism comprises a second guide part; the second guide part is connected with the leaf spring, and the winding ear is configured to move along a second direction relative to the second guide part, so as to change the lateral bending of the leaf spring simulation part; and / or The first adjusting mechanism comprises an adjusting part arranged between the winding ear and the leaf spring; the adjusting part is configured to adjust the distance between the winding ear and the leaf spring in a third direction, so as to change the camber of the leaf spring simulation part.

2. The suspension tester of claim 1, wherein, The axle target part is an axle simulation part or an axle to-be-tested part; The suspension simulation part can be replaced by a suspension to-be-tested part.

3. The suspension tester of claim 2 wherein, The suspension simulation part comprises a bracket group simulation part; the bracket group simulation part is connected between the vehicle frame simulation part and a leaf spring target part; the leaf spring target part is the leaf spring simulation part or a leaf spring to-be-tested part; or The suspension to-be-tested part comprises a bracket group to-be-tested part; the bracket group to-be-tested part is connected between the vehicle frame simulation part and a leaf spring target part; the leaf spring target part is the leaf spring simulation part or a leaf spring to-be-tested part.

4. The suspension tester of claim 2 wherein, The suspension simulation part comprises a hanger ring simulation part; the hanger ring simulation part is connected between the vehicle frame simulation part and a leaf spring target part; the leaf spring target part is the leaf spring simulation part or a leaf spring to-be-tested part; or The suspension to-be-tested part comprises a hanger ring to-be-tested part; the hanger ring to-be-tested part is connected between the vehicle frame simulation part and a leaf spring target part; the leaf spring target part is the leaf spring simulation part or a leaf spring to-be-tested part.

5. The suspension tester of claim 2 wherein, The suspension simulation part comprises a shock absorber bracket simulation part; the shock absorber bracket simulation part is connected between the axle target part and a leaf spring target part; the axle target part is an axle simulation part or an axle to-be-tested part, and the leaf spring target part is the leaf spring simulation part or a leaf spring to-be-tested part; or The suspension to-be-tested part comprises a shock absorber bracket to-be-tested part; the shock absorber bracket to-be-tested part is connected between the axle target part and a leaf spring target part; the axle target part is an axle simulation part or an axle to-be-tested part, and the leaf spring target part is the leaf spring simulation part or a leaf spring to-be-tested part. The axle simulation part comprises an axle body simulation part, a flange simulation part and a second adjusting mechanism; 6. The suspension tester of claim 2 wherein, ​ The second adjusting mechanism is arranged between the axle body simulation piece and the flange simulation piece; The flange simulation piece is rotatable relative to the axle body simulation piece by means of the second adjusting mechanism to adjust to a preset angle.

7. An assembly variation detection method for the suspension tester as claimed in any one of claims 1 to 6, characterized by, The method comprises: Assembling a suspension simulation piece to a preset position on a frame simulation piece in a suspension testing fixture; the suspension simulation piece comprises a leaf spring simulation piece; the leaf spring simulation piece comprises a leaf spring, a eyelet and a first adjusting mechanism, the first adjusting mechanism is configured to be able to adjust the positional relationship between the leaf spring and the eyelet to change the shape of the leaf spring simulation piece; Assembling an axle target piece to the suspension simulation piece; Determining an assembly deviation based on the suspension testing fixture.

8. The assembly variation detection method according to claim 7, wherein Before the step of determining an assembly deviation based on the suspension testing fixture, the method further comprises the step of: Replacing the suspension simulation piece with a suspension to-be-tested piece.

9. The assembly variation detection method according to claim 8, wherein The step of replacing the suspension simulation piece with a suspension to-be-tested piece specifically comprises: Replacing a support group simulation piece in the suspension simulation piece with a support group to-be-tested piece; and / or Replacing a hanger ring simulation piece in the suspension simulation piece with a hanger ring to-be-tested piece; and / or Replacing a shock absorber support simulation piece in the suspension simulation piece with a shock absorber support to-be-tested piece; and / or Replacing a leaf spring simulation piece in the suspension simulation piece with a leaf spring to-be-tested piece.

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