A suspension bracket assembly and assembly method

Abstract

This invention discloses a suspension bracket assembly and its assembly method, relating to the field of automotive parts technology. The assembly includes a suspension bracket and a sheet metal bracket. The suspension bracket has a first connection point and a second connection point. One end of the sheet metal bracket is connected to the first connection point, and the other end is connected to the second connection point. Both sides of the sheet metal bracket have flanges that extend a predetermined length from the first connection point towards the second connection point. This invention solves the squealing problem caused by insufficient Y-axis dynamic stiffness by increasing the number of connection points in the sheet metal bracket and optimizing its structure.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and in particular to a suspension bracket assembly and its assembly method. Background Technology

[0002] The car engine is mounted on a suspension bracket, which bears the reciprocating inertial forces and torques generated by the engine's rotation and translational mass. The suspension bracket also serves to isolate vibrations. Currently, in addition to focusing on vehicle reliability, automakers are paying more attention to comfort and fuel efficiency. To improve energy efficiency while maintaining comfort, suspension components need to meet higher performance requirements.

[0003] Traditional suspension brackets such as Figure 1 As shown, the top of the suspension bracket is bolted to a sheet metal bracket, with only one connection point between the sheet metal bracket and the suspension bracket. The sheet metal bracket is 4mm thick and has no flanged structure. Since gasoline vehicles are less sensitive to the Y-axis dynamic stiffness of the suspension bracket than hybrid vehicles, this structure meets the overall vehicle NVH requirements. However, hybrid vehicles, with their higher powertrain compression ratios and higher power outputs, are more sensitive to the Y-axis dynamic stiffness of the bracket, requiring a Y-axis dynamic stiffness greater than 10000 N / mm. Traditional suspension bracket structures cannot meet the NVH requirements of hybrid vehicles. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a suspension bracket assembly and assembly method, which solves the squealing problem caused by the Y-direction dynamic stiffness not meeting the design requirements by increasing the connection points of the sheet metal bracket and optimizing the sheet metal bracket structure.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, embodiments of the present invention provide a suspension bracket assembly, including a suspension bracket and a sheet metal bracket. The suspension bracket is provided with a first connection point and a second connection point. One end of the sheet metal bracket is connected to the first connection point and the other end is connected to the second connection point. Both sides of the sheet metal bracket are provided with flanges, and the flanges extend a predetermined length from the first connection point to the second connection point.

[0007] As a further implementation, the first connection point is located at the top of the suspension bracket, and the second connection point is located beside the first connection point.

[0008] As a further implementation, the thickness of the sheet metal bracket is greater than 4mm and less than or equal to 7mm.

[0009] As a further implementation, the sheet metal bracket includes a first bending portion and a second bending portion connected as one piece, and both sides of the first bending portion are provided with flanges.

[0010] As a further implementation, the flange extends to the junction of the second bend and the first bend.

[0011] As a further implementation, the sheet metal bracket is connected to the cantilever bracket by bolts.

[0012] As a further implementation, it also includes a suspension support arm and a suspension main spring, wherein the suspension support arm is inserted into the suspension bracket through the suspension main spring;

[0013] The main suspension spring is equipped with a flow channel system.

[0014] Secondly, embodiments of the present invention also provide a method for assembling a suspension bracket assembly, comprising:

[0015] Assemble the flow channel system into the main suspension spring, press the suspension support arm into the main suspension spring, and press the main suspension spring into the suspension bracket.

[0016] The two ends of the sheet metal bracket are respectively connected to the first connection point and the second connection point, and the sheet metal bracket and the suspension bracket are connected by bolts.

[0017] As a further implementation method, the bolts at both ends of the sheet metal bracket are pre-tightened, and then the bolts are tightened.

[0018] As a further implementation method, a diagonal line is drawn after tightening.

[0019] The beneficial effects of this invention are as follows:

[0020] (1) The present invention adds a connection point with the vehicle body and uses two bolts to assemble the sheet metal bracket, making the structure more stable; and sets flanges on both sides of the sheet metal bracket to improve the dynamic stiffness of the bracket in the Y direction; without modifying the vehicle body structure and without significantly changing the suspension itself, the NVH of the whole vehicle is improved while reducing development costs and development cycle.

[0021] (2) The suspension assembly of the present invention only changes the sheet metal bracket structure. The suspension bracket is equipped with new mounting holes. The sheet metal bracket is thicker than 4mm and adopts a bending structure and a flanged structure to increase rigidity and support strength. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of a traditional suspension structure;

[0024] Figure 2This is a schematic diagram of the suspension spring structure according to one or more embodiments of the present invention;

[0025] Figure 3 This is a schematic diagram of the suspension assembly structure according to one or more embodiments of the present invention;

[0026] Figure 4 This is a comparison diagram of the CAE analysis results of the present invention with traditional structures based on one or more embodiments.

[0027] Among them, 1. Flow channel system, 2. Suspension main spring, 3. Suspension support arm, 4. Suspension bracket, 5. First bolt, 6. Sheet metal bracket, 7. Second bolt, 8. Flanged edge. Detailed Implementation

[0028] It should be noted that the following detailed description is illustrative and intended to provide further explanation 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.

[0029] Example 1:

[0030] In a typical embodiment of the present invention, such as Figure 2 and Figure 3 As shown, a suspension bracket assembly is presented.

[0031] like Figure 1 As shown, the top of the traditional suspension bracket is connected to the sheet metal bracket by bolts. The sheet metal bracket and the suspension bracket have only one connection point, and the sheet metal bracket is 4mm thick and has no flange structure. The above structure does not meet the Y-direction stiffness requirements of hybrid vehicles.

[0032] Based on this, this embodiment provides a suspension bracket assembly, such as... Figure 2 and Figure 3 As shown, the suspension bracket assembly includes a flow channel system 1, a suspension main spring 2, a suspension support arm 3, a suspension bracket 4, and a sheet metal bracket 6. The suspension main spring 2 is provided with the flow channel system 1. The suspension support arm 3 is inserted into the suspension main spring 2. The suspension main spring 2 is inserted into the suspension bracket 4. The sheet metal bracket 6 is connected to the suspension bracket 4.

[0033] The sheet metal bracket 6 in this embodiment is stamped from a plate with a thickness greater than 4mm and less than or equal to 7mm, and all bends are connected by flanges 8; an additional connection point with the vehicle body is added, which improves the dynamic stiffness of the bracket in the Y direction; without modifying the vehicle body structure and with little change to the mounting itself, the overall NVH of the vehicle is improved, while development costs and development cycle are reduced.

[0034] Specifically, such as Figure 3As shown, a first connection point, i.e. the original connection point, is set at the top of the suspension bracket 4, and a second connection point, i.e. the newly added connection point, is set next to the first connection point. The sheet metal bracket 6 is connected between the first connection point and the second connection point.

[0035] In this embodiment, the second connection point is located on one side of the suspension bracket 4; of course, in other embodiments, the second connection point may also be located at the top of the suspension bracket or other positions.

[0036] The sheet metal bracket 6 includes a first bending part and a second bending part, which are integral structures. The first bending part is connected to a first connection point by a first bolt 5, and the second bending part is connected to a second connection point by a second bolt 7. The junction of the second bending part and the first bending part forms a corner structure.

[0037] In this embodiment, the first bolt 5 and the second bolt 7 are of different types; the first bolt 5 is an M8 bolt, and the second bolt 7 is an M6 bolt.

[0038] Specifically, taking the first connection point as the starting end, the first bend portion consists of a horizontal segment, an arc-shaped transition segment, and an inclined segment connected in sequence from the starting end to the other end, with the inclined segment inclined towards the second bend portion. The second bend portion consists of an inclined segment and a horizontal segment connected in sequence from its connection end with the first bend portion to the other end, with the horizontal segment connected to the second connection point; the inclined segment of the second bend portion has a mounting hole.

[0039] like Figure 3 As shown, flanges 8 are provided on both sides of the first bend, and the flanges 8 on the outer side of the first bend extend to the inclined section of the second bend. By providing flanges 8 at the bend, the stiffness in the Y direction is increased.

[0040] like Figure 4 As shown, compared to traditional suspension brackets, this embodiment adds a sheet metal bracket 6 mounting hole (i.e., the second connection point) to the suspension bracket 4, and uses two bolts to assemble the sheet metal bracket 6; and provides flanges 8 on both sides of the sheet metal bracket 6 to improve the Y-direction stiffness, solve the squealing problem caused by the Y-direction dynamic stiffness not meeting the design requirements, and can withstand the higher compression ratio and power of the hybrid vehicle powertrain; the suspension assembly structure of this embodiment has small changes, low cost changes, and short development cycle.

[0041] Example 2:

[0042] This embodiment provides an assembly method for a suspension bracket assembly. The suspension bracket assembly adopts the structure described in Embodiment 1, and its assembly process is as follows:

[0043] First, assemble the flow channel system 1 into the suspension main spring 2, then press the suspension support arm 3 into the suspension main spring 2, and then press the suspension main spring 2 into the suspension bracket 4; then install the sheet metal bracket 6 with the bolts corresponding to the first connection point and the second connection point: first pre-tighten the first bolt 5, then pre-tighten the second bolt 7, then tighten the first bolt 5 again, with a tightening torque of 30±3N.m, and finally tighten the second bolt 7, with a tightening torque of 10±1N.m, and mark the tightened bolts with diagonal lines.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A suspension bracket assembly, characterized in that, The device includes a suspension bracket and a sheet metal bracket. The suspension bracket has a first connection point and a second connection point. One end of the sheet metal bracket is connected to the first connection point and the other end is connected to the second connection point. Both sides of the sheet metal bracket are provided with flanges, and the flanges extend a predetermined length from the first connection point to the second connection point. The first connection point is located at the top of the suspension bracket, and the second connection point is located beside the first connection point; The sheet metal bracket includes a first bending portion and a second bending portion connected as one piece, and both sides of the first bending portion are provided with flanges; the flanges extend to the connection section between the second bending portion and the first bending portion.

2. The suspension bracket assembly according to claim 1, characterized in that, The thickness of the sheet metal bracket is greater than 4mm and less than or equal to 7mm.

3. A suspension bracket assembly according to claim 1 or 2, characterized in that, The sheet metal bracket is connected to the cantilever bracket by bolts.

4. A suspension bracket assembly according to claim 1 or 2, characterized in that, It also includes a suspension support arm and a suspension main spring, wherein the suspension support arm is inserted into the suspension bracket through the suspension main spring; The main suspension spring is equipped with a flow channel system.

5. The assembly method of a suspension bracket assembly according to any one of claims 1-4, characterized in that, include: Assemble the flow channel system into the main suspension spring, press the suspension support arm into the main suspension spring, and press the main suspension spring into the suspension bracket. The two ends of the sheet metal bracket are respectively connected to the first connection point and the second connection point, and the sheet metal bracket and the suspension bracket are connected by bolts.

6. The assembly method of a suspension bracket assembly according to claim 5, characterized in that, Pre-tighten the bolts at both ends of the sheet metal bracket, and then tighten the bolts.

7. The assembly method of a suspension bracket assembly according to claim 6, characterized in that, Tighten and mark with a diagonal line.

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