A McPherson front independent suspension motion characteristics fine-tuning device and fine-tuning method

Abstract

The present invention relates to a fine-tuning device and method for the kinematic characteristics of a McPherson front independent suspension, which comprises: a bushing assembly, which comprises: a bushing base, which is provided with a mounting hole extending along its axial direction and at least two gasket holes, wherein the mounting hole is used to be mounted on a shock absorber through a fastener, and the bushing base can be elastically deformed; a gasket, which is mounted in the gasket hole, and the gasket can adjust the radial stiffness of the bushing base; a ball joint assembly, which is used to be connected to a stabilizer bar, and the ball joint assembly is connected to the bushing assembly through a connecting rod. The bushing base can be elastically deformed, and after the gasket is installed in the gasket hole, the hardness of the bushing base can be changed, so that the radial stiffness of the bushing assembly can be adjusted to meet the kinematic characteristics requirements of the vehicle being adjusted, and the bushing assembly has high precision when in use, low sensitivity to manufacturing errors, and can accurately improve the steering characteristics of the vehicle, thereby having better control over the kinematic characteristics of the vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle steering systems, and in particular to a fine-tuning device and a fine-tuning method for the kinematic characteristics of a McPherson front independent suspension. Background Art

[0002] The McPherson independent suspension is an important part of the automobile safety structure. The driving control and comfort of the automobile have always been closely related to the suspension system in the chassis structure, and the simplicity and complexity of the suspension structure also directly determines the manufacturing cost of the automobile. The McPherson independent suspension is one of many suspension systems. It has won wide market application with its simple structure, low cost and good comfort. The stabilizer bar hanger rod is the connecting rod connecting the stabilizer bar and the shock absorber in the McPherson front independent suspension system of the vehicle.

[0003] In the related art, the stabilizer bar hanger upright in the McPherson front independent suspension only has the function of guiding and connecting. The kinematic pairs at both ends of the hanger connecting rod are spherical hinges, which are rigid connections in kinematics. The ball joint has three degrees of freedom and can be installed and used as long as the motion swing angle is met. It cannot assist in adjusting the steering characteristics of the McPherson front independent suspension, especially under the premise of keeping the original installation position unchanged. In addition, the ball joints at both ends of the hanger are expensive. When the vehicle needs to adjust the steering characteristics, due to key influencing factors and vehicle manufacturing and assembly errors, the adjustment of high-sensitivity influencing factors causes the vehicle's steering characteristics to be too much or too little, and the adjustment process is complicated and costly.

[0004] Therefore, it is necessary to propose a fine-tuning device and method for the kinematic characteristics of a McPherson front independent suspension to solve the above problems. Summary of the invention

[0005] The embodiment of the present invention provides a device and method for fine-tuning the kinematic characteristics of a McPherson front independent suspension, so as to solve the problems in the related art that the ball joint cannot assist in adjusting the steering characteristics of the McPherson front independent suspension, the vehicle steering characteristics are too much or too little, the adjustment process is complicated, and the cost is high.

[0006] In a first aspect, a device for fine-tuning the kinematic characteristics of a McPherson front independent suspension is provided, comprising: a bushing assembly, comprising: a bushing base, which is provided with a mounting hole extending along its axial direction and at least two gasket holes, wherein the mounting hole is used to be mounted on a shock absorber via a fastener, and the bushing base can undergo elastic deformation; a gasket, which is mounted in the gasket hole, and the gasket can adjust the radial stiffness of the bushing base; a ball joint assembly, which is used to be connected to a stabilizer bar, and the ball joint assembly is connected to the bushing assembly via a connecting rod.

[0007] In some embodiments, a base hole is provided on the bushing base, an adjustment base is detachably installed in the base hole, and the gasket hole is provided on the adjustment base.

[0008] In some embodiments, the cross-section of the adjustment base is arc-shaped, and is arranged at intervals around the outer side of the mounting hole with the axis of the bushing base as the central axis.

[0009] In some embodiments, calculated by mass percentage, the adjustment base includes the following raw materials: 43%-55% natural rubber, 3%-4.5% sulfur, 2%-4% zinc oxide, 10%-15% plasticizer, 5%-11% natural resin, 5%-8% clay, and 2.5%-32% accelerator.

[0010] In some embodiments, the gasket includes a first gasket and a second gasket, the cross-sections of the first gasket and the second gasket are both arc-shaped, and the center angle of the first gasket is greater than the center angle of the second gasket.

[0011] In some embodiments, an adjustment base is installed on the bushing base, and at least two gaskets are installed on each of the adjustment bases. The openings of the two gaskets are opposite to each other and are symmetrically arranged. The first gasket is located at the outermost side of each gasket.

[0012] In some embodiments, there are multiple first gaskets and multiple second gaskets, and the opening directions are perpendicular to the radial direction of the bushing base. The multiple first gaskets and multiple second gaskets are arranged at intervals along the extension direction of the adjustment base with the axis of the bushing base as the center axis.

[0013] In some embodiments, the connecting rod includes a first segment connected to the bushing assembly and a second segment connected to the ball joint assembly, the second segment is installed on the inner side of the first segment by means of threads, and the length of the second segment entering the first segment is adjustable.

[0014] In some embodiments, the ball joint assembly includes a ball seat and a ball joint, the ball joint is installed in the ball seat, the ball joint is elliptical, and the major axis of the ellipse is roughly parallel to the axis of the connecting rod, and the axis of the connecting rod is perpendicular to the axis of the bushing base.

[0015] In a second aspect, a method for fine-tuning a McPherson front independent suspension kinematic characteristic fine-tuning device is provided, which comprises the following steps: determining the radial stiffness that the bushing assembly needs to achieve according to the kinematic characteristic requirements of the vehicle; installing a gasket in a gasket hole of a bushing base, and adjusting the radial stiffness of the bushing base using different gasket combinations until the bushing assembly achieves the required radial stiffness.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include:

[0017] 1. The embodiment of the present invention provides a fine-tuning device and method for the kinematic characteristics of a McPherson front independent suspension. The bushing base can be elastically deformed. After the gasket is installed in the gasket hole, the hardness of the bushing base can be changed, so that the radial stiffness of the bushing assembly can be adjusted to meet the kinematic characteristics requirements of the adjusted vehicle. Under the premise of keeping the hard point of the connection position unchanged, the problem of adjusting the steering characteristics of the vehicle by the McPherson front independent suspension stabilizer bar ear upright is solved. The device has high accuracy when in use and low sensitivity to manufacturing errors, and can accurately improve the steering characteristics of the vehicle, thereby having better control over the kinematic characteristics of the vehicle.

[0018] 2. By replacing the ball joint in the related technology with a bushing connection, the degree of freedom of the mechanism is changed, the development cost of the McPherson front independent suspension is reduced, and the configuration and use of simple modified vehicles can play a role in high efficiency and low cost;

[0019] 3. For the vehicle motion characteristics adjustment, there is no need to frequently use trial samples for replacement. Only the combination of gaskets can change the radial stiffness of the bushing, shortening the cycle of vehicle performance adjustment;

[0020] 4. It can be used as a vehicle-mounted tool, which is convenient and portable, and can adjust the vehicle's motion characteristics at any time when needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the overall structure of a device for fine-tuning the kinematic characteristics of a McPherson front independent suspension provided by an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a bushing base of a McPherson front independent suspension kinematic characteristic fine-tuning device provided by an embodiment of the present invention;

[0024] Figure 3 A schematic structural diagram of an adjustment base of a McPherson front independent suspension kinematic characteristic fine-tuning device provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the top view of the structure of an adjustment base of a device for finely adjusting the kinematic characteristics of a McPherson front independent suspension provided by an embodiment of the present invention;

[0026] Figure 5 A schematic structural diagram of a gasket of a McPherson front independent suspension kinematic characteristic fine-tuning device provided by an embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a ball joint assembly of a McPherson front independent suspension kinematic characteristic fine-tuning device provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the effect of a McPherson front independent suspension kinematic characteristic fine-tuning device on vehicle steering characteristic adjustment provided by an embodiment of the present invention;

[0029] Figure 8 A flow chart of a fine-tuning method for a McPherson front independent suspension kinematic characteristic fine-tuning device provided in an embodiment of the present invention.

[0030] Numbers in the figure:

[0031] 1. Bushing assembly; 11. Bushing base; 111. Mounting hole; 112. Base hole; 13. Adjustment base; 131. Gasket hole; 12. Gasket; 121. First gasket; 122. Second gasket; 2. Ball joint assembly; 21. Ball seat; 22. Ball joint; 3. Connecting rod; 31. First segment; 311. Adjustment nut; 312. Threaded hole; 313. Boss; 32. Second segment. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The embodiment of the present invention provides a device and method for fine-tuning the kinematic characteristics of a McPherson front independent suspension, which can solve the problems in the related art that the ball joint cannot assist in adjusting the steering characteristics of the McPherson front independent suspension, the vehicle steering characteristics are too much or too little, the adjustment process is complicated, and the cost is high.

[0034] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a McPherson front independent suspension kinematic characteristic fine-tuning device provided by an embodiment of the present invention may include a bushing assembly 1 and a ball joint assembly.

[0035] The bushing assembly 1 includes a bushing base 11, which is provided with a mounting hole 111 extending along its axial direction and at least two gasket holes 131, the mounting hole 111 is used to be installed on the shock absorber through a fastener, and the bushing base 11 can undergo elastic deformation; a gasket 12, which is installed in the gasket hole 131, and the gasket 12 can adjust the radial stiffness of the bushing base 11; a ball joint assembly 2, which is used to be connected to the stabilizer bar, and the ball joint assembly 2 is connected to the bushing assembly 1 through a connecting rod 3. In this embodiment, the bushing base 11 is made of elastic material and can undergo elastic deformation. The gasket 12 has a certain hardness. After the gasket 12 is installed in the gasket hole 131, the hardness of the bushing base 11 can be changed, thereby adjusting the radial stiffness of the bushing assembly 1 to achieve the purpose of adjusting the motion characteristics of the vehicle. The two ends of the fine-tuning device of the present application are respectively on the vehicle The McPherson front independent suspension system connects the stabilizer bar and the shock absorber. Under the premise of keeping the hard point of the connection position unchanged, the problem of adjusting the steering characteristics of the vehicle by the McPherson front independent suspension stabilizer bar ear upright is solved. It has high accuracy when in use and low sensitivity to manufacturing errors, and can accurately improve the steering characteristics of the vehicle, thereby having better control over the vehicle's motion characteristics. By replacing the ball joint in the relevant technology with a bushing connection, the change in the degree of freedom of the mechanism is satisfied, and the development cost of the McPherson front independent suspension is reduced, which can play a role in high efficiency and low cost for the configuration and use of simple modified vehicles. For the adjustment of the vehicle's motion characteristics, there is no need to frequently use trial samples for replacement. Only the combination of gaskets can be used to change the radial stiffness of the bushing, shortening the cycle of the vehicle's actual vehicle performance adjustment. It can be used as a vehicle-mounted tool, which is convenient and portable, and the vehicle's motion characteristics can be adjusted at any time when needed.

[0036] In some optional embodiments, the bushing base 11 is preferably cylindrical, or conical, or can adopt other shapes according to actual conditions; the bushing base 11 is preferably made of rubber, or can be made of elastic plastic, or can be made of other elastic materials.

[0037] See also Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the bushing base 11 may be provided with a base hole 112, in which an adjustment base 13 is detachably installed, and the adjustment base 13 is provided with the gasket hole 131. In this embodiment, the adjustment base 13 is made of elastic material and can undergo elastic deformation. The gasket 12 is installed on the adjustment base 13, and the adjustment base 13 is installed on the bushing base 11. There are multiple adjustment bases 13. Different numbers, shapes or materials of gaskets 12 installed on each adjustment base 13 can make the adjustment base 13 have different hardness. Different numbers of adjustment bases 13 installed on the bushing base 11 can also make the bushing assembly 1 have different hardness. That is to say, the adjustment can be changed according to the motion characteristics of the vehicle being adjusted. By changing the number, shape or material of the gaskets 12 installed on the adjustment base 13, or changing the number of the adjustment bases 13 installed on the bushing base 11, the radial stiffness of the bushing assembly 1 can be changed to meet various motion characteristic requirements. At the same time, the adjustment accuracy can be higher, and the steering characteristics of the vehicle can be accurately improved, thereby having better control over the vehicle's motion characteristics. After the adjustment base 13 is installed with the gasket 12, the adjustment base 13 with the gasket 12 can be used on different bushing bases 11. If the motion characteristics of multiple vehicles need to be adjusted, it is only necessary to replace the corresponding adjustment base 13 according to the needs, without replacing the bushing base 11 or removing the gasket 12. It has good versatility, saves costs, improves assembly efficiency, and shortens the cycle of vehicle actual vehicle performance adjustment.

[0038] See also Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the cross-section of the adjustment base 13 is arc-shaped, and the axis of the bushing base 11 is used as the central axis, and the adjustment base 13 is arranged at intervals around the outer side of the mounting hole 111. In this embodiment, there are 4 adjustment bases 13, which are arranged around the central axis of the bushing base 11. The connecting lines of the 4 adjustment bases 13 form a circle with the central axis of the bushing base 11 as the center, and the 4 adjustment bases 13 are evenly arranged around the circle. Since the gasket 12 is installed on the adjustment base 13, the arrangement of the adjustment base 13 allows the gasket 12 to be The gaskets 12 are arranged in a circle around the central axis of the bushing base 11, so that the radial stiffness of the bushing assembly 1 can be adjusted from all directions. If the radial stiffness of the bushing assembly 1 at different angles needs to be adjusted, it is only necessary to adjust the gasket 12 on the corresponding adjustment base 13 at this angle. The replacement device can complete the required performance fine-tuning requirements and meet the requirements for adjusting the motion characteristics of the vehicle at different angles. Moreover, since it can be adjusted in all directions, it has high accuracy when used, can accurately improve the steering characteristics of the vehicle, and thus have better control over the motion characteristics of the vehicle.

[0039] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the gasket 12 may include a first gasket 121 and a second gasket 122. The cross-sections of the first gasket 121 and the second gasket 122 are both arc-shaped, and the center angle of the first gasket 121 is greater than the center angle of the second gasket 122. In this embodiment, the first gasket 121 is a metal gasket, which is used when a greater hardness is required. The second gasket 122 is made of engineering plastics with different densities. By making the second gasket 122 with different densities, the radial hardness of the bushing assembly 1 can be adjusted. The first gasket 121 and the second gasket The sheets 122 are all arc-shaped and can produce a certain elastic deformation. When the adjustment base 13 and the bushing base 11 produce elastic deformation, the gasket 12 can also produce elastic deformation, thereby adjusting the radial stiffness of the bushing assembly 1. The central angle of the first gasket 121 is greater than the central angle of the second gasket 122. The deformation amounts of the first gasket 121 and the second gasket 122 are different, and the adjustment effects on the radial stiffness of the bushing assembly 1 are also different. Therefore, according to the different degrees of motion characteristics of the vehicle, the corresponding first gasket 121 and the second gasket 122 can be selected and installed, and the adjustment accuracy is higher.

[0040] See also Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, an adjustment base 13 can be installed on the bushing base 11, and at least two of the gaskets 12 are installed on each of the adjustment bases 13, and the openings of the two gaskets 12 are opposite to each other and symmetrically arranged. In this embodiment, each adjustment base 13 is provided with two gaskets 12, and each gasket 12 includes three second gaskets 122 and one first gasket 121 evenly spaced. The openings of the two groups of first gaskets 121 and second gaskets 122 are relatively symmetrically arranged, and the arrangement positions of the gaskets 12 are relatively regular. When adjusting the radial stiffness of the bushing assembly 1, the number, size, material and installation position of the gaskets 12 to be installed can be determined according to the regularity of the arrangement positions of the gaskets 12 through experience or calculation, thereby avoiding the need to disassemble and assemble the gaskets 12 multiple times, shortening the cycle of actual vehicle performance tuning, and only adjusting the combined gasket 12 or replacing the device is required to meet the required performance fine-tuning requirements.

[0041] See also Figure 4As shown, in some embodiments, the first gasket 121 can be located at the outermost side of each gasket 12. In this embodiment, since the first gasket 121 is made of metal and has a greater hardness, and the second gasket 122 is made of engineering plastic and has a lower hardness than the first gasket 121, when inserting the gasket 12, the second gasket 122 is first inserted to the innermost side, and then the gasket 12 in the subsequent vacant hole position is added according to the hardness adjustment requirements. That is to say, when adjusting the radial stiffness of the bushing assembly 1, the insertion order of the gasket 12 is from the axis of the adjustment base 13 to both sides, and the hardness of the inserted gasket 12 is from small to large, so that different According to the adjustment requirements, different positions are used in combination. For example, first insert the two second gaskets 122 into the innermost gasket holes 131, and then test whether the adjustment requirements of the radial stiffness of the bushing assembly 1 are met. If not, determine which side needs to add the gasket 12, and then insert the gasket 12 into the corresponding position. The hardness of the gasket 12 inserted from the inside to the outside becomes larger, and the radial stiffness of the bushing assembly 1 can be gradually increased to achieve a higher adjustment accuracy. If the first gasket 121 with greater hardness is inserted into the adjustment base 13 at the beginning, the radial stiffness of the bushing assembly 1 is instantly adjusted to a greater extent, and the adjustment accuracy will be lower. In other embodiments, the positions of the first gasket 121 and the second gasket 122 can also be freely changed.

[0042] See also Figure 4 As shown, in some embodiments, there are multiple first gaskets 121 and second gaskets 122, and the opening directions are perpendicular to the radial direction of the bushing base 11. The multiple first gaskets 121 and second gaskets 122 are arranged at intervals along the extension direction of the adjustment base 13 with the axis of the bushing base 11 as the center axis. In this embodiment, the shape of the adjustment base 13 is roughly fan-shaped, and the openings of the two groups of first gaskets 121 and second gaskets 122 are opposite to each other and are symmetrically arranged along the radial direction of the bushing base 11. That is to say, the two groups of first gaskets 121 and second gaskets 122 are evenly arranged around the center of the adjustment base 13 and are symmetrical to each other. Therefore, when the gasket 12 is inserted into the adjustment base 13 to adjust the radial stiffness of the bushing assembly 1, the hardness of the bushing assembly 1 in all directions is relatively uniform, which is convenient for adjusting the combination position of the gasket 12 and shortens the adjustment time.

[0043] See also Figure 1As shown, in some embodiments, the connecting rod 3 may include a first segment 31 connected to the bushing assembly 1 and a second segment 32 connected to the ball joint assembly 2, the second segment 32 is installed on the inner side of the first segment 31 by threads, and the length of the second segment 32 entering the first segment 31 is adjustable. In this embodiment, by adjusting the length of the second segment 32 entering the first segment 31, the length of the connecting rod 3 is adjusted, which can adapt to different suspensions and adjustment requirements under different hard point structures, saving trial production costs. When used in different vehicle models, the connecting rod 3 can be adjusted to an adaptable length, which can be adapted to the McPherson suspension of all vehicle models, reducing the adjustment cost and saving the adjustment time.

[0044] See also Figure 6 As shown, in some embodiments, the ball joint assembly 2 may include a ball seat 21 and a ball joint 22, wherein the ball joint 22 is installed in the ball seat 21, and the ball joint 22 is elliptical, and the major axis of the ellipse is roughly parallel to the axis of the connecting rod 3, and the axis of the connecting rod 3 is perpendicular to the axis of the bushing base 11. In this embodiment, the elliptical ball joint 22 can meet the swing angle and motion stroke requirements of the McPherson front independent suspension under the device, meet the use requirements of the vehicle steering angle, and the long and short axes of the elliptical installation are less changed, and the overall material can be made of steel, aluminum or engineering plastics to meet the requirements.

[0045] Calculated by mass percentage, the adjustment base 13 includes the following raw materials: 43%-55% natural rubber, 3%-4.5% sulfur, 2%-4% zinc oxide, 10%-15% plasticizer, 5%-11% natural resin, 5%-8% clay, and 2.5%-32% accelerator. The device is installed in the connection between the stabilizer bar and the other end of the McPherson front independent suspension, and can replace the original stabilizer bar ear. By changing the composition of the rubber in the adjustment base 13, the required stiffness is achieved by adapting the vehicle performance target decomposition to adjust the steering characteristics of the adapted vehicle to achieve the purpose of optimizing the vehicle performance. The detailed component adaptation method is shown in Table 1.

[0046] Table 1

[0047] Natural rubber sulfur Zinc Oxide Plasticizers Natural resin clay material plan Adjustment results 43％ 3％ 2％ 10％ 5％ 5％ 1 Comfort Type B 47％ 3％ 2％ 11％ 7％ 6％ 2 Comfort Type A 51％ 4％ 4％ 13％ 9％ 7％ 3 Sporty B 55％ 4.5％ 4％ 15％ 11％ 8％ 4 Sporty A

[0048] See also Figure 7 As shown, the horizontal axis is the vehicle displacement, and the vertical axis is the vehicle's yaw angle. The yaw angle is affected by the change of the toe angle of the suspension. The greater the hardness of the rubber, the higher the adaptability to the sports vehicle, and the greater the slope of the corresponding curve. On the contrary, the smaller the hardness of the rubber, the higher the adaptability to the comfort vehicle, and the smaller the slope of the corresponding curve. Combined with Table 1, the composition of the rubber in the adjustment base 13 is changed to achieve the required stiffness to adapt the vehicle's steering characteristics by decomposing the performance target of the vehicle.

[0049] When in use, by measuring the length of the suspension stabilizer bar hanging ear link, adjusting the length of the first segment 31 and the second segment 32, after completing the length adaptation with the suspension stabilizer bar hanging ear link, the radial stiffness of the bushing assembly 1 is adjusted respectively to meet the requirements of adjusting the vehicle's motion characteristics. When using the bushing assembly 1, the first gasket 121 and the second gasket 122 are respectively inserted into the gasket hole 131, and the insertion method is: symmetrically insert the two second gaskets 122 into the innermost gasket hole 131 each time, and then add the gasket 12 in the subsequent vacant gasket hole 131 according to the hardness adjustment requirements, and different positions can also be used in combination to achieve the adjustment effect of changing the hardness of the bushing assembly 1. After the gasket 12 is inserted, the entire adjustment base 13 is inserted into the base hole 112 corresponding to the bushing base 11, and installed on the connecting rod 3 according to the installation direction requirements and hardness adjustment requirements, and finally installed on the vehicle to replace the stabilizer bar hanging ear link. Among them, the adjusting nut 311 can adjust the stroke length of the second section 32 entering the first section 31, so as to adjust the length of the entire device and match the hard point connection of different vehicle models. The bushing base 11 adopts a radial opening design, and the base hole 112 can meet the size of the adjustment base 13 for interference fit. The mounting hole 111 is a bolt hole for fastener fixation, and is connected to the shock absorber or other swing arms through fasteners.

[0050] The embodiment of the present invention also provides a fine tuning method of a McPherson front independent suspension kinematic characteristic fine tuning device, which comprises the following steps: determining the radial stiffness that the bushing assembly 1 needs to achieve according to the kinematic characteristic requirements of the vehicle; installing the gasket 12 in the gasket hole 131 of the bushing base 11, and adjusting the radial stiffness of the bushing base 11 by using different gasket combinations until the bushing assembly 1 achieves the required radial stiffness. The fine tuning method can also implement any of the above-mentioned embodiments of the McPherson front independent suspension kinematic characteristic fine tuning device.

[0051] See also Figure 7 and Figure 8 As shown in the figure, the specific steps of using this device are:

[0052] Step 1: In the early stage of vehicle development, its performance target needs to be confirmed. The performance target related to this is the vehicle's sporty style, which is basically divided into two types: sporty and comfortable. The performance of sporty and comfortable vehicles is contradictory. Sporty vehicles have poorer comfort and are tougher. Comfortable vehicles are softer and have slightly worse sports performance. The main performance parameter of sports performance is stability.

[0053] Step 2: After the vehicle performance target is determined in step 1, it is necessary to decompose the performance target into the suspension system target to meet it. The parameter corresponding to the suspension system performance target is the system KC characteristic, which is mainly the slope of the toe angle change of the system steering characteristic indicator. The larger the slope, the more sporty it is, and the smaller the slope, the more comfortable it is. It needs to be within the bandwidth specified by the target.

[0054] Step 3: The performance target of the suspension system is mainly affected by the hard point layout. After the hard point design is completed, virtual verification needs to be carried out to prepare for the actual vehicle adjustment in step 4.

[0055] Step 4: Real vehicle performance adjustment in the test field, mainly for the replacement of elastic components of the suspension system, using subjective evaluation (driver vehicle driving evaluation) methods;

[0056] Step 5: During the vehicle calibration process, if the existing combination of components has a large adjustment range, resulting in the inability to fine-tune the small parameters, then step 5 can be used to implement the device of the present invention;

[0057] Step 6: Replace the device of the present invention onto the vehicle. After replacement, it does not need to be removed again, saving time and no need to trial-produce related parts again, saving costs.

[0058] Step 7, adopt the corresponding gasket combination to adopt the stiffness requirement configuration of the stabilizer bar hanger bushing required by the driver;

[0059] Step 8. Combined with step 7, after each subjective evaluation, adjust the gasket requirement combination, and repeat steps 6 to 8 to complete the requirements;

[0060] Step 9: Final vehicle unified evaluation and confirmation;

[0061] Step 10: Complete the adjustment.

[0062] The principle of a McPherson front independent suspension kinematic characteristic fine-tuning device provided by an embodiment of the present invention is as follows:

[0063] The two ends of the fine-tuning device of the present application are respectively connected to the stabilizer bar and the shock absorber in the McPherson front independent suspension system of the vehicle. The bushing base 11 is made of elastic material and can undergo elastic deformation. After the gasket 12 is installed in the gasket hole 131, the hardness of the bushing base 11 can be changed, so that the radial stiffness of the bushing assembly 1 can be adjusted. During the actual vehicle adjustment process, there is no need to replace the gasket 12, and the purpose of adjusting the vehicle's motion characteristics can be achieved by directly combining the gasket 12. On the premise of keeping the hard point of the connection position unchanged, the problem of adjusting the vehicle's steering characteristics by the McPherson front independent suspension stabilizer bar ear upright is solved. In addition, the device has high accuracy during use and low sensitivity to manufacturing errors. It can accurately improve the vehicle's steering characteristics, and then have better control over the vehicle's motion characteristics, reduce the development cost of the McPherson front independent suspension, and play a role in high efficiency and low cost for the configuration and use of simple modified vehicles.

[0064] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0065] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for fine-tuning the kinematic characteristics of a McPherson front independent suspension, characterized in that: It includes: A bushing assembly (1), comprising: - a bushing base (11), which is provided with a mounting hole (111) extending along its axial direction and at least two gasket holes (131), wherein the mounting hole (111) is used for being mounted on the shock absorber through a fastener, and the bushing base (11) can be elastically deformed; - a gasket (12) mounted in the gasket hole (131), the gasket (12) being capable of adjusting the radial stiffness of the bushing base (11); A ball joint assembly (2) is used to be connected to the stabilizer bar, and the ball joint assembly (2) is connected to the bushing assembly (1) via a connecting rod (3); The bushing base (11) is provided with a base hole (112), an adjustment base (13) is detachably installed in the base hole (112), and the adjustment base (13) is provided with the gasket hole (131); The cross section of the adjustment base (13) is arc-shaped, and is arranged at intervals around the outer side of the mounting hole (111) with the axis of the bushing base (11) as the central axis; The gasket (12) comprises a first gasket (121) and a second gasket (122); the cross-sections of the first gasket (121) and the second gasket (122) are both arc-shaped, and the center angle of the first gasket (121) is greater than the center angle of the second gasket (122); An adjustment base (13) is installed on the bushing base (11), and at least two gaskets (12) are installed on each of the adjustment bases (13). The openings of the two gaskets (12) are opposite to each other and are symmetrically arranged. The first gasket (121) is located at the outermost side of each gasket (12); There are a plurality of the first gaskets (121) and the second gaskets (122), and the opening directions are perpendicular to the radial direction of the bushing base (11); the plurality of the first gaskets (121) and the second gaskets (122) are arranged at intervals along the extension direction of the adjustment base (13) with the axis of the bushing base (11) as the central axis; The first gasket (121) is a metal gasket, and the second gasket (122) is made of engineering plastics with different densities; When adjusting the radial stiffness of the bushing assembly (1), the inserting order of the gasket (12) is from the axial direction to both sides of the adjustment base (13).

2. The McPherson front independent suspension kinematic characteristics fine-tuning device according to claim 1, characterized in that: Calculated by mass percentage, the regulating base (13) comprises the following raw materials: 43%-55% natural rubber, 3%-4.5% sulfur, 2%-4% zinc oxide, 10%-15% plasticizer, 5%-11% natural resin, 5%-8% clay, and 2.5%-32% accelerator.

3. The device for fine-tuning the kinematic characteristics of the McPherson front independent suspension according to claim 1, characterized in that: The connecting rod (3) includes a first segment (31) connected to the bushing assembly (1) and a second segment (32) connected to the ball joint assembly (2); the second segment (32) is installed on the inner side of the first segment (31) by means of threads; and the length of the second segment (32) entering the first segment (31) is adjustable.

4. The McPherson front independent suspension kinematic characteristics fine-tuning device according to claim 1, characterized in that: The ball joint assembly (2) includes a ball seat (21) and a ball joint (22), wherein the ball joint (22) is installed in the ball seat (21), the ball joint (22) is elliptical, and the major axis of the ellipse is roughly parallel to the axis of the connecting rod (3), and the axis of the connecting rod (3) is perpendicular to the axis of the bushing base (11).

5. A fine-tuning method for the McPherson front independent suspension kinematic characteristics fine-tuning device as claimed in claim 1, characterized in that: It includes the following steps: Determining the radial stiffness that the bushing assembly (1) needs to achieve based on the vehicle's motion characteristics; The gasket (12) is installed in the gasket hole (131) of the bushing base (11), and the radial stiffness of the bushing base (11) is adjusted by using different gasket combinations until the bushing assembly (1) achieves the required radial stiffness.

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