Frame suspension bracket structure

Abstract

The utility model relates to the technical field of frame suspension support, disclose a kind of frame suspension support structure, including upper sheet member, lower sheet member and crossbeam, upper and lower sheet member are sheet metal parts, upper and lower combination and edge are fixed with bolt into hollow cavity, a piece of upper sheet member and a piece of lower sheet member constitute a group of sheet metal fixing parts, crossbeam both ends each bolt fixed a group and symmetrically set;Upper sheet member is folded into three faces, including a top surface and two side surfaces;Lower sheet member is bent into the bottom surface cooperation with the three faces of upper sheet member, and the hollow cavity is thus formed;Crossbeam section is rectangular, at the bolt fixing place of sheet metal fixing part and crossbeam, upper and lower sheet member respectively with the corresponding surface of crossbeam is attached;To solve the technical problem that the welding seam connection of suspension support made of sheet metal part is prone to cracking.

Description

Technical Field

[0001] This utility model relates to the field of vehicle frame suspension bracket technology, and specifically to a vehicle frame suspension bracket structure. Background Technology

[0002] In the commercial vehicle sector, NVH (Noise, Vibration, and Harshness) performance is one of the key indicators for measuring vehicle quality. As the primary power source for commercial vehicles, the engine inevitably generates vibrations during operation. If these vibrations are directly transmitted to the vehicle body, they not only cause abnormal wear on internal components, reducing their lifespan, but also produce unpleasant noise, severely impacting the comfort of passengers and ultimately reducing the vehicle's overall quality and market competitiveness.

[0003] The engine mount plays a crucial role in this process. As an elastic connecting element between the engine and the vehicle body, it absorbs and attenuates the vibration energy generated by the engine through its own elastic deformation, thereby reducing the transmission of vibration to the vehicle body. The engine mount bracket is an essential component for mounting the engine mount, providing a stable mounting base for the engine mount and ensuring that the engine mount can perform its vibration damping function properly.

[0004] Currently, commercial vehicles generally use suspension brackets designed with cast parts. Casting has many advantages, such as the ability to manufacture parts with complex shapes, allowing the suspension brackets to be optimized according to the structure and stress conditions of the vehicle frame, thereby better meeting the rigidity and strength requirements of the frame.

[0005] However, with the automotive industry's pursuit of energy conservation, emission reduction, and improved vehicle performance, lightweight chassis has become a crucial development trend. Cast suspension brackets, due to their material and manufacturing process, are relatively heavy. This not only increases the overall weight of the vehicle, leading to increased fuel consumption, but also contradicts the requirements for lightweight chassis. Furthermore, the high production costs of casting, including mold making, raw material procurement, and energy consumption during production, put significant pressure on cost control for cast suspension brackets.

[0006] To meet the requirements for lightweight chassis and reduce production costs, the industry has begun to consider using sheet metal welding to design suspension brackets. Sheet metal components have advantages such as light weight, high material utilization, and relatively low production costs. Through reasonable structural design and welding processes, they can, to a certain extent, meet the basic performance requirements of the chassis for suspension brackets.

[0007] However, this type of sheet metal mounting bracket also has significant drawbacks. During actual vehicle operation, the mounting bracket bears alternating loads generated by engine vibration. Fatigue durability simulation analysis revealed that due to limitations in the welding process and variations in material properties in the weld area, significant stress concentration occurs at the weld joints of the sheet metal mounting bracket. This makes the area highly susceptible to fatigue cracks that gradually propagate and eventually lead to weld cracking under long-term alternating loads. Once the weld cracks, the structural integrity of the mounting bracket is compromised, failing to provide stable support for the engine mount, thus affecting the normal operation of the engine and potentially causing the connection between the engine and the vehicle body to fail, posing a significant threat to vehicle safety. Utility Model Content

[0008] The present invention aims to provide a vehicle frame suspension bracket structure to solve the technical problem that the weld joints of suspension brackets made of sheet metal are prone to cracking.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a vehicle frame suspension bracket structure, comprising an upper sheet metal part, a lower sheet metal part, and a crossbeam;

[0010] Both the upper and lower sheet metal parts are sheet metal parts, and they are combined vertically. The edges are fixed with bolts to form a hollow cavity. One upper sheet metal part and one lower sheet metal part are combined to form a set of sheet metal fasteners. Each end of the crossbeam is fixed with a set of sheet metal fasteners by bolts, and the sheet metal fasteners at both ends of the crossbeam are symmetrically arranged.

[0011] The upper sheet metal is folded into three sides, namely a top surface and two side surfaces. The two side surfaces are located on both sides of the top surface and are folded downwards relative to the top surface. The lower sheet metal is curved to form a bottom surface that matches the three sides of the upper sheet metal. The hollow cavity is composed of a top surface, two side surfaces and a bottom surface.

[0012] The cross-section of the beam is rectangular. At the fixing point between the sheet metal fastener and the beam bolt, the top surface and two sides of the upper sheet metal part are respectively attached to the top surface and two sides of the beam, and the bottom surface of the lower sheet metal part is attached to the bottom surface of the beam.

[0013] The principle and advantages of this solution are as follows: It abandons traditional casting and welding connection methods, adopting a structure where upper and lower sheet metal parts are combined and bolted together to form a hollow cavity, which is then bolted to the crossbeam. This structure utilizes the inherent characteristics of sheet metal parts and a reasonable bolt connection layout to change the force transmission path and stress distribution, enabling the suspension bracket to effectively disperse stress and avoid stress concentration when subjected to alternating loads generated by engine vibration.

[0014] The use of sheet metal components for the suspension bracket, compared to traditional cast parts, effectively reduces the weight of the bracket while ensuring the basic requirements of frame rigidity and strength. This aligns with the automotive industry's trend towards energy conservation, emission reduction, and lightweight chassis, contributing to a reduction in overall vehicle weight and fuel consumption. Replacing welding with bolted connections avoids the stress concentration at weld joints, fatigue cracking, and subsequent propagation that can occur in sheet metal suspension brackets due to limitations in welding processes and variations in material properties in the weld area. This effectively ensures the structural integrity and safety performance of the suspension bracket.

[0015] Sheet metal parts have a high material utilization rate, and the bolt connection process is less expensive than the casting process in terms of mold making, raw material procurement and energy consumption during production. This can reduce the production cost of suspension brackets to a certain extent and improve the market competitiveness of the products.

[0016] Preferably, as an improvement, the top surface of the upper sheet metal is curved in three segments, namely a first top surface segment, a second top surface segment, and a third top surface segment. The first top surface segment and the third top surface segment are curved in opposite directions relative to the second top surface segment. The third top surface segment is in contact with the crossbeam and is horizontally arranged. The first top surface segment and the second top surface segment are both inclined, and the slope of the first top surface segment is less than the slope of the second top surface segment.

[0017] The bottom surface of the lower sheet metal is also curved into three sections, namely the first bottom section, the second bottom section and the third bottom section. The first bottom section and the third bottom section are curved in the same direction relative to the second bottom section. The first bottom section is set vertically, and the third bottom section is set horizontally in contact with the bottom surface of the crossbeam.

[0018] The beneficial effects of this improvement are: the top surface of the upper sheet metal is curved into three segments with different slopes, and the bottom surface of the lower sheet metal is also curved into three segments with a specific fit with the upper sheet metal. This complex three-segment bending structure changes the force transmission path. When the suspension bracket is subjected to alternating loads generated by engine vibration, the different bending segments can distribute the force to different directions and areas. Compared with a simple structure, this avoids excessive local stress concentration, further improving the fatigue resistance of the suspension bracket and extending its service life.

[0019] This design allows for more complex and diverse contact areas and connections between the upper and lower sheet metal parts, enhancing their mutual constraint. During vehicle operation, facing various complex road conditions and vibrations, this structure better maintains its shape and positional stability, providing more reliable support for the engine mounts and ensuring normal engine operation.

[0020] Preferably, as an improvement, the upper edge of the first top surface section of the upper sheet metal is provided with an outwardly extending fixing edge, and the fixing edge of the first top surface section is folded upward to fit against the first bottom surface section of the lower sheet metal.

[0021] The upper sheet metal has outwardly extending fixing edges on its two sides. The fixing edges on the sides are folded over each other and successively fit against the edges of the first bottom section, the second bottom section and the third bottom section.

[0022] The beneficial effects of this improvement are as follows: The first top section and two sides of the upper sheet metal are respectively provided with outwardly extending fixing edges that fit snugly against the corresponding parts of the lower sheet metal. This significantly increases the connection area between the upper and lower sheet metals. Under the same load, the stress per unit area is reduced, thereby improving the strength and reliability of the connection and reducing the risk of loosening or failure. When the force generated by engine vibration acts on the upper sheet metal, the fixing edges can distribute some of the force to different parts of the lower sheet metal, avoiding excessive local stress and further improving the overall mechanical performance of the suspension bracket.

[0023] Preferably, as an improvement, the upper sheet metal part has a fixing edge and the lower sheet metal part edge that fits against the fixing edge are provided with matching mounting holes;

[0024] The first top section has two symmetrical mounting holes along its fixing edge, and four mounting holes are provided along the fixing edge of one side. The mounting holes on both sides are symmetrical, and the lower sheet metal has mounting holes corresponding to those on the upper sheet metal.

[0025] The benefits of this improvement are: the addition of mounting holes makes the installation and removal of the suspension brackets more convenient and quick. During vehicle production, workers can quickly and accurately fasten the upper and lower sheet metal parts together with bolts; during later maintenance, they can also easily disassemble for inspection or replacement of parts, improving production efficiency and maintenance convenience.

[0026] Preferably, as an improvement, the top of the lower sheet metal is provided with mounting holes for bolting to a reinforcing plate inside the frame;

[0027] The first top surface section of the upper sheet metal is provided with mounting holes for connection with engine suspension bolts;

[0028] The upper sheet metal has mounting holes at the joint between the third top surface section and the crossbeam, and at the joint between the third bottom surface section and the crossbeam, for fixing with bolts to the crossbeam.

[0029] The beneficial effects of this improvement are: these mounting holes allow the suspension bracket to reliably connect with multiple components such as the chassis, engine mount, and crossbeam, forming a complete mechanical system. This ensures that engine vibrations are effectively transmitted and attenuated, while maintaining the relative positional stability of the components. During vehicle operation, facing various dynamic loads, this rigid structure effectively resists deformation, maintains the normal operating condition of the engine mount system, and improves the vehicle's NVH performance and driving safety. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0031] Figure 2 This is a front view of the sheet metal fastener according to an embodiment of the present utility model.

[0032] Figure 3 This is a top view of the sheet metal fastener according to an embodiment of the present utility model.

[0033] Figure 4 This is a cross-sectional view of the structure of an embodiment of the present utility model.

[0034] The reference numerals in the accompanying drawings include: upper sheet metal 1, lower sheet metal 2, crossbeam 3, top surface 4, first top surface section 4-1, second top surface section 4-2, third top surface section 4-3, side surface 5, first bottom surface section 6-1, second bottom surface section 6-2, third bottom surface section 6-3, fixing edge 7-1, fixing edge 7-2, assembly fixing hole 8-1, assembly fixing hole 8-2, mounting hole 9-1, mounting hole 9-2, and mounting hole 9-3. Detailed Implementation

[0035] The following detailed description illustrates the specific implementation method:

[0036] Example

[0037] The basics are as follows: Figure 1 As shown, a vehicle frame suspension bracket structure includes an upper sheet metal part 1, a lower sheet metal part 2, and a crossbeam 3. The upper sheet metal part 1 and the lower sheet metal part 2 are assembled vertically and fixed at the edges with bolts to form a hollow cavity. One upper sheet metal part and one lower sheet metal part are combined to form a set of sheet metal fasteners, and each end of the crossbeam 3 is bolted with a set of sheet metal fasteners. Both the upper sheet metal part 1 and the lower sheet metal part 2 are sheet metal parts.

[0038] As attached Figure 2 Appendix Figure 3 and attached Figure 4 As shown, the upper sheet metal 1 is folded into three sides: a top surface 4 and two side surfaces 5. The two side surfaces 5 are located on either side of the top surface 4 and are folded downwards relative to the top surface 4. The lower sheet metal 2 is curved and forms a bottom surface that mates with the three sides of the upper sheet metal 1. This results in the hollow cavity being composed of the top surface 4, the two side surfaces 5, and the bottom surface. The crossbeam 3 has a rectangular cross-section. At one end of the sheet metal fastener and the crossbeam bolt, the top surface 4 and the two side surfaces 5 of the upper sheet metal are respectively attached to the top surface and the two side surfaces of the crossbeam 3, and the bottom surface of the lower sheet metal 2 is attached to the bottom surface of the crossbeam 3. This allows the sheet metal fastener to wrap around the four sides of the crossbeam at the fixed end of the crossbeam. The sheet metal fasteners at both ends of the crossbeam are symmetrically arranged.

[0039] The top surface of the upper sheet metal 1 is curved into three segments: the first top surface segment 4-1, the second top surface segment 4-2, and the third top surface segment 4-3. The first top surface segment 4-1 and the third top surface segment 4-3 are curved in opposite directions relative to the second top surface segment 4-2. Because the third top surface segment 4-3 is in contact with the crossbeam 3, it is horizontally positioned. The first top surface segment 4-1 and the second top surface segment 4-2 are both inclined, and the slope of the first top surface segment 4-1 is less than that of the second top surface segment 4-2.

[0040] The lower sheet metal 2 is also curved in three sections on its bottom surface: the first bottom section 6-1, the second bottom section 6-2, and the third bottom section 6-3. The first bottom section 6-1 and the third bottom section 6-3 are curved in the same direction relative to the second bottom section 6-2. The first bottom section 6-1 is vertically positioned, while the third bottom section 6-3 is horizontally positioned and fits against the bottom surface of the crossbeam 3.

[0041] The upper edge of the first top surface section 4-1 of the upper sheet metal is provided with an outwardly extending fixing edge 7-1, which is folded upward and fits against the first bottom surface section 6-1 of the lower sheet metal. The two sides 5 of the upper sheet metal are respectively provided with outwardly extending fixing edges 7-2, which are folded against each other and fit against the edges of the first bottom surface section 6-1, the second bottom surface section 6-2, and the third bottom surface section 6-3 in sequence.

[0042] The upper sheet metal has a fixing edge and the lower sheet metal edge that fits with the fixing edge, and is provided with matching mounting holes. Specifically, the fixing edge of the first top surface section is provided with two symmetrical mounting holes 8-1, and the fixing edge of one side is provided with four mounting holes 8-2 in sequence. The mounting holes on both sides are symmetrical, and the lower sheet metal is provided with mounting holes corresponding to the upper sheet metal.

[0043] The lower sheet metal has two mounting holes 9-1 on its top for fixing to the reinforcing plate bolts inside the frame. The upper sheet metal has two mounting holes 9-2 on its first top surface for connecting to engine mount bolts. The upper sheet metal has two mounting holes 9-3 where it meets the crossbeam on its third top surface, and the lower sheet metal has two mounting holes where it meets the crossbeam on its third bottom surface. The upper and lower sides of the crossbeam where they meet the upper and lower sheet metal have corresponding mounting holes for securing the upper and lower sheet metal to the upper and lower sides of the crossbeam with bolts.

[0044] The chassis suspension bracket structure, while ensuring the rigidity and strength of the chassis, makes full use of the thin-walled and high-strength characteristics of sheet metal parts, effectively reducing the weight of the suspension bracket and achieving the goal of chassis lightweighting, which helps to improve the vehicle's fuel economy and power performance.

[0045] This multi-segment bending structure can better disperse and bear loads from different directions, making the stress distribution more uniform and avoiding local stress concentration. This improves the load-bearing capacity and fatigue resistance of the entire suspension bracket, further ensuring the rigidity and strength of the frame.

[0046] By employing bolted connections, the upper and lower sheet metal parts are assembled into a sheet metal fastener, which is then bolted to the crossbeam. This connection method avoids the risk of cracking in the suspension bracket welds during durability fatigue testing, a risk associated with traditional welding methods. Bolted connections offer advantages such as detachability, reliable connection strength, and uniform stress distribution. Even under complex alternating loads during long-term use, they effectively ensure the stability of the connection points, thereby guaranteeing the safety performance of the chassis suspension bracket and extending its service life.

[0047] The fixing edge and fixing holes for assembling the upper and lower sheet metal parts increase the connection area between them, improve the connection's firmness, and provide convenient operating space for bolt installation. This makes the assembly process simpler and more efficient, helping to improve production efficiency and reduce production costs.

[0048] This embodiment also provides a dimensional example, wherein the included angle between the first top surface segment of the upper sheet metal and the first bottom surface segment of the lower sheet metal can be 60°. The included angle between the first bottom surface segment and the second bottom surface segment can be 134°, and the included angle between the second bottom surface segment and the third bottom surface segment can be 136°. The included angle between the first top surface segment and the second top surface segment can be 155°, and the included angle between the second top surface segment and the third top surface segment can be 124°. This data is only a dimensional example, and the specific values ​​can be adjusted according to the vehicle body size.

[0049] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A frame suspension bracket structure, characterized by: Includes upper sheet metal, lower sheet metal, and crossbeam; Both the upper and lower sheet metal parts are sheet metal parts, and they are combined vertically. The edges are fixed with bolts to form a hollow cavity. One upper sheet metal part and one lower sheet metal part are combined to form a set of sheet metal fasteners. Each end of the crossbeam is fixed with a set of sheet metal fasteners by bolts, and the sheet metal fasteners at both ends of the crossbeam are symmetrically arranged. The upper sheet metal is folded into three sides, namely a top surface and two side surfaces. The two side surfaces are located on both sides of the top surface and are folded downwards relative to the top surface. The lower sheet metal is curved to form a bottom surface that matches the three sides of the upper sheet metal. The hollow cavity is composed of a top surface, two side surfaces and a bottom surface. The cross-section of the beam is rectangular. At the fixing point between the sheet metal fastener and the beam bolt, the top surface and two sides of the upper sheet metal part are respectively attached to the top surface and two sides of the beam, and the bottom surface of the lower sheet metal part is attached to the bottom surface of the beam.

2. A frame suspension bracket structure according to claim 1, characterized in that: The top surface of the upper sheet metal is curved into three segments: a first top surface segment, a second top surface segment, and a third top surface segment. The first top surface segment and the third top surface segment are curved in opposite directions relative to the second top surface segment. The third top surface segment is in contact with the crossbeam and is horizontally arranged. The first top surface segment and the second top surface segment are both inclined, and the slope of the first top surface segment is less than the slope of the second top surface segment. The bottom surface of the lower sheet metal is also curved into three sections, namely the first bottom section, the second bottom section and the third bottom section. The first bottom section and the third bottom section are curved in the same direction relative to the second bottom section. The first bottom section is set vertically, and the third bottom section is set horizontally in contact with the bottom surface of the crossbeam.

3. A frame suspension bracket structure according to claim 2, wherein: The upper edge of the first top surface section of the upper sheet metal is provided with an outwardly extending fixing edge, and the fixing edge of the first top surface section is folded upward to fit against the first bottom surface section of the lower sheet metal. The upper sheet metal has outwardly extending fixing edges on its two sides. The fixing edges on the sides are folded over each other and successively fit against the edges of the first bottom section, the second bottom section and the third bottom section.

4. A frame suspension bracket structure according to claim 3, wherein: The upper sheet metal part has a fixing edge and the lower sheet metal part edge that fits against the fixing edge, and is provided with matching mounting and fixing holes. The first top section has two symmetrical mounting holes along its fixing edge, and four mounting holes are provided along the fixing edge of one side. The mounting holes on both sides are symmetrical, and the lower sheet metal has mounting holes corresponding to those on the upper sheet metal.

5. A frame suspension bracket structure according to claim 4, wherein: The top of the lower sheet metal is provided with mounting holes for bolting to the reinforcing plate inside the frame; The first top surface section of the upper sheet metal is provided with mounting holes for connection with engine suspension bolts; The upper sheet metal has mounting holes at the joint between the third top surface section and the crossbeam, and at the joint between the third bottom surface section and the crossbeam, for fixing with bolts to the crossbeam.

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