Mounting structure and mounting method of a body-integrated suspension

Abstract

The application discloses a mounting structure and a mounting method of a body integrated suspension, and the mounting structure comprises a suspension and a limiting structure, the suspension comprises a suspension main spring and a suspension supporting arm, and the suspension main spring and the suspension supporting arm are vulcanized into an integrated structure; the limiting structure is located at the edge of a shock tower mounted on the upper surface of a body longitudinal beam and is an integrated structure with the body longitudinal beam, the limiting structure is a frame with a rectangular space, the suspension is mounted in the rectangular space of the frame to limit the suspension, and the suspension is integrated in the frame of the body longitudinal beam; the mounting structure of the body integrated suspension provided by the application achieves the function of limiting by forming features on the body, releases Y and X spaces, enables the shock tower to be stronger, improves the strength and rigidity of the shock tower itself, and improves the vibration absorption performance of the whole vehicle; meanwhile, the mounting point of the suspension on the longitudinal beam is cancelled, the collapse area of the collision safety is increased, and the collision safety of the whole vehicle is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension assembly structure design, in particular to a mounting structure and mounting method of a body integrated suspension. BACKGROUND

[0002] At present, the automobile industry is booming, and new energy vehicles are leading the trend in the international market. Major automakers are releasing new models one after another. In order to reduce research and development costs, major automakers pay great attention to platform development. The same platform covers SUV / MPV / A / B vehicles, and takes into account different needs such as comfort and off-road performance. This requires that the maximum motion envelope be considered during component development. As a result, the suspension layout space is very small, and the shock tower dynamic stiffness is insufficient.

[0003] The engine suspension serves to reduce and control the transmission of engine vibration and acts as a supporting automobile power assembly. The existing suspension structure, as shown in Figure 1 , includes a suspension main spring 1, a suspension bracket 2, and a suspension drag arm 3. The suspension main spring 1 is located in the suspension bracket 2. Three bolt holes are provided on the suspension bracket 2. The two bottom bolt holes are connected to the longitudinal beam by bolts, and the top bolt hole is connected to the shock tower by a bolt. The suspension bracket 2 serves to limit and fix the suspension main spring 1. The suspension main spring 1 is connected to the suspension drag arm 3, which is connected to the engine to provide support for the engine. The existing suspension assembly is installed as a separate component on the longitudinal beam and the shock tower. The suspension bracket needs to be provided with multiple bolt holes to achieve the installation of the suspension bracket, which results in a large space occupied by the entire suspension bracket in the X and Y directions. Due to space limitations, the suspension main spring structure is relatively small, and the shock isolation performance is poor. In addition, the shock tower has no space for reinforcement, resulting in low vehicle dynamic stiffness and poor vibration absorption performance. SUMMARY

[0004] The purpose of the present application is to provide a mounting structure and mounting method of a body integrated suspension, which can solve the problems of insufficient layout space and insufficient shock tower dynamic stiffness, and improve the shock tower dynamic stiffness and the overall vehicle NVH performance.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] In a first aspect, the embodiments of the present application provide a mounting structure of a body integrated suspension, which includes a suspension and a limiting structure. The suspension includes a suspension main spring and a suspension drag arm, and the suspension main spring and the suspension drag arm are vulcanized into an integrated structure. The limiting structure is located at the edge of the shock tower installed on the upper surface of the vehicle body longitudinal beam, and is an integrated structure with the vehicle body longitudinal beam. The limiting structure is a frame with a rectangular space. The suspension is installed in the rectangular space of the frame to limit the suspension, so that the suspension is integrated in the frame of the vehicle body longitudinal beam.

[0007] As a further technical solution, a sheet metal support is arranged on the inner wall surface of the frame, the size of the sheet metal support is smaller than the size of the frame, and the sheet metal support is connected with the frame through a plurality of riveting bolts.

[0008] As a further technical solution, a groove and a threaded hole are arranged at the bottom of the sheet metal support, and the size of the groove matches the size of the base of the suspension main spring.

[0009] As a further technical solution, a gap fit is adopted between the sheet metal support and the suspension main spring, and the assembly is fixed through a bottom bolt. The bolt is sequentially threaded through the threaded hole on the upper surface of the body longitudinal beam, the threaded hole at the bottom of the sheet metal support, and the threaded hole of the base of the suspension main spring to fix the suspension main spring.

[0010] As a further technical solution, a round corner transition is adopted at the corner of the sheet metal support.

[0011] As a further technical solution, a suspension flow channel is arranged in the suspension main spring, and the suspension flow channel is filled with damping liquid.

[0012] As a further technical solution, the size of the suspension main spring cavity is greater than 80 mm, the damping angle is greater than 40°, and the X-direction limiting length is greater than 12 mm.

[0013] In a second aspect, an embodiment of the present application provides a mounting method of a mounting structure of a body integrated suspension, comprising the following steps:

[0014] First, vulcanize the support arm together with the rubber to obtain a suspension main spring with a support arm;

[0015] Then, assemble the flow channel system into the suspension main spring, and fill the flow channel system with damping liquid;

[0016] Then, install the sheet metal support into the limiting structure on the body longitudinal beam;

[0017] Finally, assemble the suspension main spring into the limiting structure on the body longitudinal beam, and tighten and fix it through the bolt. The sheet metal support is used to limit and support the suspension main spring, so as to realize the integration of the suspension on the vehicle body.

[0018] As a further technical solution, when the suspension main spring is tightened and fixed by the bolt, the tightening torque is 110±11 N·m, and a diagonal line is marked.

[0019] As a further technical solution, when installing the sheet metal support, different thicknesses of sheet metal supports are selected for installation according to the need for limiting distance.

[0020] The beneficial effects of the above embodiments of the present application are as follows:

[0021] The mounting structure of the body integrated suspension provided by the application cancels the suspension support, installs the suspension main spring on the vehicle body, achieves the limiting function through the features on the vehicle body, releases the Y direction and X direction space, enables the shock tower to be stronger, improves the strength and rigidity of the shock tower itself, and improves the vibration absorption performance of the whole vehicle; meanwhile, the suspension and the mounting point on the longitudinal beam are canceled, the collapse area of the collision safety is increased, and the collision safety of the whole vehicle is improved.

[0022] The mounting structure of the body integrated suspension provided by the application rivets the sheet metal support and the limiting structure, improves the dynamic rigidity of the side of the vehicle body, improves the NVH performance of the whole vehicle, meanwhile, the sheet metal support adopts large round corners around, is convenient for assembling with the shock tower, the thickness of the sheet metal support can be adjusted during the whole vehicle tuning, the purpose of adjusting the limiting distance is achieved, is beneficial to the whole vehicle tuning, and is easy to realize in batches.

[0023] The mounting structure of the body integrated suspension provided by the application adopts gap fit, is assembled through bottom bolt fixation, the number of assembly bolts in the general assembly workshop is reduced from three to one, the assembly efficiency of the production line is improved; the conventional main spring cavity diameter is 60 mm, the damping angle is > 35°, the main spring cavity structure diameter of the application can be 80 mm, the damping angle is > 40°, the X direction limiting block of the conventional main spring is about 12 mm, the length of the X direction limiting block of the suspension main spring of the application can be 15 mm, the X direction dynamic-static ratio during acceleration can be reduced, and the acceleration working condition comfort of the whole vehicle is improved.

[0024] The mounting method of the body integrated suspension provided by the application integrates the suspension on the vehicle body instead of installing it as a separate part, can solve the problems of insufficient arrangement space and insufficient dynamic rigidity of the shock tower, improve the dynamic rigidity of the shock tower, and further improve the NVH performance of the whole vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings accompanying the specification of the application form a part of the application and serve to further understand the application. The schematic embodiments of the application and the description thereof serve to explain the application and do not constitute an improper limitation of the application.

[0026] Figure 1 is a structure schematic diagram of an existing engine suspension;

[0027] Figure 2 is a structure schematic diagram of the suspension of the application;

[0028] Figure 3 is a schematic diagram of the limiting structure of the suspension of the application;

[0029] Figure 4 is a schematic diagram of the suspension of the application after installation.

[0030] The diagram is for illustrative purposes only.

[0031] Among them, 1. main suspension spring; 101. main suspension spring base; 2. suspension bracket; 3. suspension support arm; 4. suspension flow channel; 5. body longitudinal beam; 6. shock absorber tower; 7. limiting structure; 8. sheet metal bracket; 801. groove; 802. threaded hole; 9. riveting bolt; 10. bolt. Detailed Implementation

[0032] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] Example 1

[0034] like Figure 1 The suspension structure shown requires a large space for installation, and suffers from problems such as the small size of the main suspension spring and the inability to reinforce the shock absorber tower. In a typical embodiment of the present invention, as shown... Figures 2-4 As shown, a mounting structure for an integrated vehicle body suspension is provided, including a suspension and a limiting structure 7. The suspension includes a main suspension spring 1 and a suspension support arm 3, which are vulcanized into a single structure. The limiting structure 7 is located at the edge of the upper surface of the vehicle body longitudinal beam 5 where the shock absorber tower 6 is mounted, and is an integral structure with the vehicle body longitudinal beam. The limiting structure 7 is a frame with a rectangular space. The suspension is installed within the rectangular space of the frame to limit the suspension, so that the suspension is integrated within the frame of the vehicle body longitudinal beam.

[0035] Existing suspension mounts are fixed and limited by suspension brackets. When there is insufficient space, this invention proposes to eliminate the suspension brackets and mount the main suspension spring onto the vehicle body longitudinal beam. By making feature improvements on the vehicle body longitudinal beam, the limiting function can be achieved. This can save the space occupied by the suspension brackets, which can be used to increase the size of the main suspension spring. It can also strengthen the shock absorber tower at the corresponding position to improve the dynamic stiffness of the shock absorber tower. This can improve the overall NVH performance of the vehicle, solve the layout problem, and reduce costs.

[0036] In this embodiment, a sheet metal bracket 8 is provided on the inner wall of the frame. The size of the sheet metal bracket 8 is smaller than the size of the frame, and the sheet metal bracket 8 is connected to the frame by multiple riveting bolts 9. Specifically, the three surfaces of the sheet metal bracket that are in contact with the frame are fixed with two riveting bolts each; welding can also be used for connection. The thickness of the sheet metal bracket can be selected according to the required limiting distance of the main suspension spring, so as to achieve standardization and mass production of the vehicle body longitudinal beam and limiting structure.

[0037] Further, the bottom of the sheet metal bracket 8 is provided with a groove 801 and a threaded hole 802, the size of the groove 801 matches the size of the base of the suspension main spring 1. Further, the sheet metal bracket 8 and the suspension main spring 1 are assembled in clearance fit and fixed by a bottom bolt 10, the bolt 10 sequentially penetrates the threaded hole on the upper surface of the vehicle body longitudinal beam 5, the threaded hole at the bottom of the sheet metal bracket 8 and the threaded hole of the base 101 of the suspension main spring, and then the suspension main spring 1 is fixed. The suspension main spring 1 is fixed by only one bottom bolt, the number of assembly bolts is reduced from three to one, and the assembly efficiency of the production line is improved.

[0038] In the embodiment, the corners of the sheet metal bracket 8 are rounded, which facilitates assembly with the limiting structure, and the installation strength of the suspension is improved by the provided sheet metal bracket, and the lateral dynamic stiffness of the vehicle body is further improved.

[0039] In the embodiment, the suspension main spring 1 is provided with a suspension flow channel 4, and the suspension flow channel 4 is filled with damping liquid. The damping liquid flows back and forth between the suspension channels, forms a certain damping effect, realizes large damping effect at low frequency, and weakens the amplitude of vibration.

[0040] The installation structure of the vehicle body integrated suspension provided in the embodiment has the following advantages: the size of the suspension main spring is greater than 80 mm, the damping angle is greater than 40°, and the X-direction limiting length is greater than 12 mm. The conventional main spring cavity diameter is 60 mm, and the damping angle is greater than 35°. The cavity structure diameter of the suspension main spring of the present application can reach 80 mm, and the damping angle is greater than 40°. The large-size suspension main spring improves the damping angle and the damping effect, which can effectively attenuate the vibration of the engine, thereby improving the riding comfort; the X-direction limiting width of the conventional suspension main spring is about 12 mm, and the X-direction limiting block length of the suspension main spring of the present application can reach 15 mm, which can reduce the X-direction dynamic-static ratio during acceleration and improve the comfort of the vehicle during acceleration.

[0041] The sequence of the installation structure of the vehicle body integrated suspension provided in the embodiment is as follows:

[0042] The first step is to vulcanize the suspension bracket arm together with the rubber to obtain a bracket arm main spring structure; the second step is to assemble the flow channel system into the suspension main spring, and then fill the damping liquid; the third step is to assemble the sheet metal bracket with the vehicle body longitudinal beam by riveting and bolting; the fourth step is to assemble the main spring on the vehicle body, and tighten the assembly bolt with a tightening torque of 110±11 N.m, and mark the diagonal line.

[0043] The first and second steps in the steps are carried out at the suspension supplier to obtain a main spring assembly; the third step is carried out in the vehicle body welding workshop to obtain a vehicle body with suspension limiting; and the fourth step is carried out in the assembly workshop to complete the assembly.

[0044] The application breaks through the conventional suspension structure form, and provides an operable suspension structure design scheme when the arrangement space is insufficient. In the conventional suspension structure, the suspension bracket reaches the limiting effect, the size of the suspension is relatively large, and the shock tower space is occupied. If the shock tower needs to be avoided, the dynamic stiffness of the whole vehicle is sacrificed, and the processing difficulty of the shock tower is increased. The suspension limiting bracket is cancelled in the application, and the limiting is performed by the boundary of the shock tower, which has the following advantages: 1. The Y direction and X direction space is released, the strength and stiffness of the shock tower itself are improved, and the vibration absorption performance of the whole vehicle is improved; 2. The conventional main spring cavity diameter is 60 mm, and the damping angle is greater than 35°. The main spring cavity structure diameter of the structure is 80 mm, and the damping angle is greater than 40°; 3. The conventional main spring X direction limiting block is about 12 mm, and the length of the main spring X direction limiting block of the structure is 15 mm, which reduces the X direction dynamic static ratio during acceleration and improves the acceleration working condition comfort of the whole vehicle; 4. The suspension and the longitudinal beam upper mounting point are cancelled, the collapse area of the crash safety is increased, and the crash safety of the whole vehicle is improved; 5. The sheet metal bracket is riveted with the shock tower, the dynamic stiffness of the side of the vehicle body is improved, and the NVH performance of the whole vehicle is improved; 6. The sheet metal bracket is transitioned by a large round corner around, which is convenient for assembly with the edge of the shock tower; 7. The thickness of the sheet metal bracket can be adjusted during the whole vehicle tuning, the purpose of adjusting the limiting distance is achieved, which is beneficial to the whole vehicle tuning, and is easy to realize in batches; 8. The conventional suspension main spring and the bracket are assembled by interference fit, and the structure is assembled by gap fit through bottom bolt fixation; 9. The number of assembly bolts in the general assembly workshop is reduced from three to one, and the assembly efficiency of the production line is improved.

[0045] Example 2

[0046] In a typical embodiment of the application, a mounting method of a mounting structure of a vehicle body integrated suspension is provided, comprising the following steps:

[0047] First, the bracket arm is vulcanized with rubber to obtain a suspension main spring with a bracket arm;

[0048] Then, the flow channel system is assembled into the suspension main spring, and the damping liquid is filled into the flow channel system;

[0049] Then, the sheet metal bracket is installed into the limiting structure on the vehicle body longitudinal beam;

[0050] Finally, the suspension main spring is assembled into the limiting structure on the vehicle body longitudinal beam, and is fixed by screwing, and the sheet metal bracket is used to limit and support the suspension main spring, so as to realize the integration of the suspension on the vehicle body.

[0051] Further, when the suspension main spring is fixed by screwing, the tightening torque is 110±11 N·m, and a diagonal line mark is marked.

[0052] Further, when the sheet metal bracket is installed, different thicknesses of the sheet metal bracket are selected according to the needs of the limiting distance for installation.

[0053] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mounting structure for an integrated vehicle body suspension, characterized in that, The device includes a suspension mount and a limiting structure. The suspension mount includes a main suspension spring and a suspension support arm, which are vulcanized into a single structure. The limiting structure is located at the edge where the shock absorber tower is mounted on the upper surface of the vehicle body longitudinal beam and is an integral structure with the vehicle body longitudinal beam. The limiting structure is a frame with a rectangular space. The suspension mount is installed within the rectangular space of the frame to limit the suspension mount, so that the suspension mount is integrated into the frame of the vehicle body longitudinal beam. A sheet metal bracket is provided on the inner wall of the frame. The size of the sheet metal bracket is smaller than the size of the frame. The sheet metal bracket is connected to the frame by multiple riveting bolts. The bottom of the sheet metal bracket is provided with a groove and a threaded hole, and the size of the groove matches the size of the base of the main spring suspension. The sheet metal bracket and the main suspension spring are fitted with a clearance fit and assembled by fixing with bottom bolts. The bolts pass through the threaded holes on the upper surface of the vehicle body longitudinal beam, the threaded holes at the bottom of the sheet metal bracket, and the threaded holes in the main suspension spring base to fix the main suspension spring.

2. The mounting structure of the vehicle body integrated suspension as described in claim 1, characterized in that, The edges and corners of the sheet metal bracket are rounded.

3. The mounting structure of the vehicle body integrated suspension as described in claim 1, characterized in that, The main suspension spring is provided with a suspension flow channel, which is filled with damping fluid.

4. The mounting structure of the vehicle body integrated suspension as described in claim 1, characterized in that, The size of the suspension main spring cavity is greater than 80mm, the damping angle is greater than 40°, and the X-direction limiting length is greater than 12mm.

5. An installation method for a vehicle body integrated suspension mounting structure as described in any one of claims 1-4, characterized in that, Includes the following steps: First, the support arm and rubber are vulcanized together to obtain the suspension spring with the support arm; Then the flow channel system is assembled into the suspension main spring, and damping fluid is filled into the flow channel system; Then install the sheet metal bracket into the limiting structure on the longitudinal beam of the vehicle body; Finally, the main suspension spring is assembled into the limiting structure on the longitudinal beam of the vehicle body and fixed by bolts. Sheet metal brackets are used to limit and support the main suspension spring, so as to integrate the suspension into the vehicle body.

6. The installation method of the vehicle body integrated suspension mounting structure as described in claim 5, characterized in that, When tightening the main suspension spring with bolts, the tightening torque is 110±11Nm, and a diagonal line is drawn to mark it.

7. The installation method of the vehicle body integrated suspension mounting structure as described in claim 5, characterized in that, When installing sheet metal brackets, select sheet metal brackets of different thicknesses according to the required limiting distance.

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