Rear suspension mounting arrangement for range extender

Abstract

The utility model discloses a kind of range extender rear suspension mounting devices, including I-shaped support crossbeam and rear suspension mounting bracket, the I-shaped support crossbeam is installed between the left longitudinal beam and right longitudinal beam of frame;Rear suspension mounting bracket is fixed in the top of the upper flange of I-shaped support crossbeam, for installing the rear suspension of range extender;In the structure of this range extender rear suspension mounting device, the moment of inertia of I-shaped section beam is larger, can effectively resist vertical vibration load generated when range extender works;Rear suspension mounting bracket is installed in the top of the upper flange of I-shaped support crossbeam, I-shaped support crossbeam plays a good supporting role, the dynamic stiffness of rear suspension mounting bracket mounting point part is good, can better inhibit the transmission of range extender vibration to frame, can effectively optimize the whole vehicle NVH performance.

Description

Technical Field

[0001] This utility model relates to the field of vehicle structure design technology, specifically to a range extender rear suspension mounting device. Background Technology

[0002] Range-extended commercial vehicles generally employ a non-load-bearing body structure, with the range extender's rear suspension typically mounted on the frame crossbeam. Previously, the rear suspension mounting crossbeam often used a single C-section beam structure. In this structure, the Z-direction (vehicle height direction) stiffness of the mounting crossbeam is relatively weak, resulting in poor dynamic stiffness (the structure's ability to resist deformation under dynamic loads) near the rear suspension mounting point, and consequently, poor vibration isolation performance of the rear suspension. More seriously, this vibration is amplified and transmitted to the frame longitudinal beams through the mounting crossbeam, and then introduced into the cab via the vehicle body transmission path, forming significant structural noise and low-frequency vibration. With increasing consumer demands for driving comfort, this NVH (Noise, Vibration, Harshness) problem caused by insufficient dynamic stiffness of the mounting crossbeam has become a key bottleneck restricting the quality improvement of range-extended commercial vehicles. Especially under prolonged high-speed conditions, the accumulation of vibration energy accelerates the generation of abnormal noises from interior components and exacerbates driver fatigue.

[0003] Therefore, how to solve the problem of poor NVH quality of the whole vehicle caused by insufficient dynamic stiffness of the rear suspension mounting beam has become a technical problem that needs to be solved. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a rear suspension mounting device for a range extender, which has good dynamic stiffness near the mounting point of the rear suspension bracket and can effectively optimize the NVH performance of the whole vehicle.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a range extender rear suspension mounting device, comprising: an I-beam support beam, the I-beam support beam being installed between the left and right longitudinal beams of the vehicle frame; and a rear suspension mounting bracket, fixed to the top of the upper flange of the I-beam support beam, for mounting the rear suspension of the range extender.

[0006] Furthermore, the I-shaped support beam is formed by two channel beams fixed back to back with opposite opening directions.

[0007] Furthermore, a reinforcing plate is fixedly attached to the upper surface of the upper flange of the I-shaped support beam, and the reinforcing plate covers the joint left when the two channel beams are fixedly attached.

[0008] Furthermore, the reinforcing plates extend beyond the upper flange on both sides of the upper flange of the I-shaped support beam in the width direction, and the extended portions are bent downward to form flanged parts.

[0009] Furthermore, it also includes an L-shaped reinforcing plate located below the rear suspension mounting bracket. The L-shaped reinforcing plate has a vertical plate portion and a horizontal plate portion. The vertical plate portion is fixed to the web of the I-shaped support beam, and the horizontal plate portion is fixed to the upper flange of the I-shaped support beam.

[0010] Furthermore, the L-shaped reinforcing plate consists of two pieces, which are symmetrically arranged on the front and rear sides of the web of the I-shaped support beam.

[0011] Furthermore, the L-shaped reinforcing plate is provided with multiple reinforcing ribs along its own length.

[0012] Furthermore, the web of the I-shaped support beam is provided with multiple weight-reducing holes.

[0013] Furthermore, a left longitudinal beam connecting plate and a right longitudinal beam connecting plate are respectively fixed at both ends of the I-shaped support beam.

[0014] Furthermore, both the left longitudinal beam connecting plate and the right longitudinal beam connecting plate are U-shaped structural plates, and the two flanges of the left longitudinal beam connecting plate are respectively fixed to the top surface of the upper flange and the bottom surface of the lower flange of the I-shaped support beam, and the two flanges of the right longitudinal beam connecting plate are respectively fixed to the top surface of the upper flange and the bottom surface of the lower flange of the I-shaped support beam.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The range extender rear suspension mounting device provided by this utility model has good dynamic stiffness near the rear suspension bracket mounting point, which can effectively suppress range extender vibration and optimize the NVH performance of the whole vehicle. Specifically, the I-beam cross-section has a larger moment of inertia, which can effectively resist the vertical vibration load generated by the range extender during operation; the rear suspension mounting bracket is installed on the top of the upper flange of the I-beam support beam, and the I-beam support beam plays a good supporting role. The good dynamic stiffness at the mounting point of the rear suspension bracket can better suppress the transmission of range extender vibration to the vehicle frame, thereby reducing vibration in the cab and optimizing the NVH performance of the whole vehicle.

[0017] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0019] Figure 2This is an isometric structural diagram of an I-beam supporting crossbeam.

[0020] Figure 3 This is a schematic diagram of the isometric structure of the L-shaped reinforcing plate.

[0021] Reference numerals: 1-I-shaped support beam; 1a-weight reduction hole; 101-slot beam; 102-left longitudinal beam connecting plate; 103-right longitudinal beam connecting plate; 2-rear suspension mounting bracket; 3-reinforcing plate; 3a-flanged edge; 4-L-shaped reinforcing plate; 4a-vertical plate; 4b-horizontal plate; 401-reinforcing rib. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only for illustrating the basic concept of this utility model. Unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0023] Please see Figure 1-3This embodiment discloses a rear suspension mounting device for a range extender, including an I-beam support beam 1 and a rear suspension mounting bracket 2. The I-beam support beam 1 is installed between the left and right longitudinal beams of the vehicle frame. The rear suspension mounting bracket 2 is fixed to the top of the upper flange of the I-beam support beam 1 and is used to mount the rear suspension of the range extender. It is understood that "top of the upper flange" here refers to the top in the vertical direction. The I-beam support beam 1 serves as the support beam for the rear suspension mounting bracket 2, providing a reliable support point for the range extender. The I-beam support beam 1 can be made of rolled I-beams or welded composite I-beam structures. More specifically, the width of the lower flange of the I-beam support beam 1 is the same as or slightly wider than the upper flange. The rear suspension mounting bracket 2 can be an existing vibration isolation bracket, etc., and its mounting position on the upper flange can be adjusted to the middle or near the end of the I-beam support beam 1 according to the range extender layout requirements; details will not be elaborated here. The rear suspension mounting bracket 2 is preferably fixed to the upper flange of the I-beam support beam 1 with bolts; the I-beam cross-section facilitates bolt assembly. The connection between the I-beam support beam 1 and the left and right longitudinal beams of the frame can be achieved using a flange connection structure, with reliable fixing through high-strength bolts. This technical solution significantly improves the Z-direction bending stiffness of the support beam by replacing the traditional C-beam structure with an I-beam cross-section support beam. Specifically, the I-beam cross-section beam has a larger moment of inertia, which can effectively resist the vertical vibration load generated during the operation of the range extender; by mounting the rear suspension mounting bracket 2 on the top of the upper flange of the I-beam support beam 1, the I-beam support beam 1 provides excellent support, and the dynamic stiffness at the mounting point of the rear suspension mounting bracket 2 is good, which can better suppress the transmission of range extender vibration to the frame, thereby optimizing the NVH performance of the entire vehicle.

[0024] See Figure 2 In this embodiment, the I-beam support beam 1 is formed by two channel beams 101 fixed back-to-back with opposite opening directions. Specifically, the channel beam 101 refers to a metal plate with a U-shaped cross-section, having two parallel flanges and a web connecting the flanges. Preferably, the webs of the two channel beams 101 are riveted together to form the I-beam support beam 1 with an I-shaped cross-section. The thickness of the channel beam 101 can be selected according to the load-bearing requirements, typically within the range of 3-8mm; the material can be high-strength steel or aluminum alloy, etc. Thus, by adopting a structure with double channel beams 101 connected back-to-back, the bending stiffness of the support beam in the Z direction is significantly improved compared to the traditional single C-beam. At the same time, the I-beam support beam 1 in this structural design is simple to process; the two channel beams 101 can be directly stamped from sheet metal, which helps to save costs. Furthermore, the web portion formed by the superimposed webs of the two channel beams 101 effectively improves the support strength.

[0025] See Figure 2In this embodiment, a reinforcing plate 3 is fixedly attached to the upper surface of the upper flange of the I-beam support beam 1, and the reinforcing plate 3 covers the joint left when the two channel beams 101 are fixedly attached. Specifically, the reinforcing plate 3 is a flat plate structure, and preferably, the width of the reinforcing plate 3 is slightly wider (usually 2-5mm) than the width of the upper flange of the I-beam support beam 1. The rear suspension mounting bracket 2 is fixedly connected to the reinforcing plate 3 and the upper flange of the I-beam support beam 1 by bolts. Preferably, in this embodiment, the length of the reinforcing plate 3 is equal to the length of the I-beam support beam 1. The fixing connection method of the reinforcing plate 3 includes, but is not limited to, welding, riveting or bolting. This technical solution further improves the overall rigidity of the beam by setting the reinforcing plate 3 on the top of the I-beam support beam 1. Specifically, the reinforcing plate 3 forms a rigid connection with the upper flanges of the two channel beams 101, which significantly enhances the bending resistance of the I-beam support beam 1 in the Z direction. At the same time, it improves the connection reliability of the two channel beams 101. As a result, the dynamic stiffness near the mounting point of the rear suspension bracket 2 is improved, which can better suppress the transmission of range extender vibration to the vehicle frame.

[0026] See Figure 2 In this embodiment, the reinforcing plate 3 extends beyond the upper flange on both sides of the upper flange of the I-shaped support beam 1 in the width direction, and the extended portions are bent downwards to form flanges 3a. The flanges 3a strengthen the spatial structure of the I-shaped support beam 1, providing better torsional stiffness and bending resistance. Specifically, the flanges 3a are vertical extension structures formed by bending the edges of the reinforcing plate 3 downwards by 90 degrees. Furthermore, the thickness of the flanges 3a can be consistent with the main body of the reinforcing plate 3, typically made of 3-5mm thick steel plate. Therefore, by providing flanges 3a on both sides of the reinforcing plate 3, the torsional stiffness of the reinforcing plate 3 can be significantly improved, which helps reduce deformation caused by stress concentration. This design allows vibration energy to be better absorbed and dispersed during transmission, helping to better reduce the transmission efficiency of range extender vibration to the frame. This solution, while maintaining a lightweight structure, achieves a significant improvement in the torsional stiffness of the support beam through simple structural improvements.

[0027] In this embodiment, an L-shaped reinforcing plate 4 is also included below the rear suspension mounting bracket 2. The L-shaped reinforcing plate 4 has a vertical plate portion 4a and a horizontal plate portion 4b. The vertical plate portion 4a is fixed to the web of the I-beam support beam 1, and the horizontal plate portion 4b is fixed to the upper flange of the I-beam support beam 1. Specifically, the L-shaped reinforcing plate 4 is located directly below the rear suspension mounting bracket 2 in the vertical direction. The vertical plate portion 4a of the L-shaped reinforcing plate 4 can be fixed to the web of the I-beam support beam 1 by welding or bolting, and the horizontal plate portion 4b can be fixed to the upper flange of the I-beam support beam 1 in the same way. The connection position between the vertical plate portion 4a and the web can be selected in the middle of the web or near the upper flange. The horizontal plate portion 4b can extend to cover part or all of the width of one side of the upper flange. The L-shaped reinforcing plate 4 can be stamped from high-strength steel plate. A rounded transition can be provided at the corner of the L-shaped reinforcing plate 4 to avoid stress concentration. This technical solution further enhances the local stiffness near the mounting point of the rear suspension bracket 2 by installing an L-shaped reinforcing plate 4 on the I-beam support beam 1. The connection between the vertical plate 4a and the web plate strengthens the bending resistance of the I-beam support beam 1 in the vertical direction, while the connection between the horizontal plate 4b and the upper wing plate improves the horizontal stability of the I-beam support beam 1. As a result, the dynamic stiffness of the rear suspension mounting point is significantly improved, better suppressing the transmission of range extender vibration to the vehicle frame, thereby reducing NVH problems caused by this. This solution has a simple and reliable structure, is easy to install, and does not significantly increase the overall weight.

[0028] In this embodiment, there are two L-shaped reinforcing plates 4, symmetrically arranged on the front and rear sides of the web of the I-beam support beam 1. Here, "front and rear sides" refers to the side closer to the front of the vehicle and the side closer to the rear. Therefore, by symmetrically arranging two sets of L-shaped reinforcing plates, the torsional and bending stiffness of the support beam under rear suspension loads can be effectively improved. Specifically, when the rear suspension mounting bracket 2 is subjected to Z-axis vibration loads, the symmetrically arranged L-shaped reinforcing plates 4 can work together to resist the torsional deformation of the web; when subjected to longitudinal or lateral loads, the two sets of L-shaped reinforcing plates 4 can share the load, avoiding stress concentration on one side. This allows for a more uniform stiffness distribution in the I-beam support beam 1, thereby significantly improving the dynamic stiffness performance of the rear suspension mounting point and effectively suppressing vibration transmission.

[0029] In this embodiment, multiple reinforcing ribs 401 are provided along the length of the L-shaped reinforcing plate 4. These reinforcing ribs further enhance the structural strength of the L-shaped reinforcing plate 4. After the L-shaped reinforcing plate 4 is installed on the I-beam support beam 1, it further improves the local torsional stiffness of the I-beam support beam 1, and can further resist the vibration load generated during the operation of the range extender, suppressing the transmission of vibration energy and further optimizing the NVH performance of the entire vehicle. Specifically, the reinforcing ribs 401 are vertically welded to the junction of the vertical plate portion 4a and the horizontal plate portion 4b of the L-shaped reinforcing plate. As a preferred embodiment, the reinforcing ribs 401 can be made of triangular steel plates, with their right-angled sides welded and fixed to the vertical plate portion 4a and the horizontal plate portion 4b respectively. Of course, the reinforcing ribs can also be designed as trapezoidal structures. Thus, by adding multiple reinforcing ribs 401, the bending stiffness of the L-shaped reinforcing plate 4 in the length direction can be significantly improved. When the vibration load generated during the operation of the range extender is transmitted to the rear suspension mounting bracket 2, the reinforcing rib 401 can effectively suppress the local deformation of the L-shaped reinforcing plate 4, thereby reducing the transmission of vibration energy. This structure in particular improves the stiffness matching of the connection area between the upper flange and the web of the I-beam support beam 1, so that the vibration energy is dissipated more evenly during transmission.

[0030] In this embodiment, the web of the I-beam support beam 1 is provided with multiple weight-reducing holes 1a. Specifically, the weight-reducing holes 1a are through holes opened in the web of the I-beam support beam 1, and their shapes can be circular, elliptical, or polygonal. As a preferred embodiment, the weight-reducing holes 1a are circular holes and are evenly arranged along the length of the web. In addition, the weight-reducing holes 1a can be formed by stamping or laser cutting, and the edges of the holes need to be chamfered to avoid stress concentration. Thus, by providing weight-reducing holes in the web of the I-beam support beam 1, the weight of the beam can be effectively reduced while ensuring the overall structural rigidity. This design optimizes the material distribution, so that the web can still maintain a sufficient moment of inertia when subjected to bending loads, while reducing the vibration amplification effect caused by mass inertia.

[0031] In this embodiment, a left longitudinal beam connecting plate 102 and a right longitudinal beam connecting plate 103 are fixedly mounted at both ends of the I-shaped support beam 1, respectively. The provision of the left longitudinal beam connecting plate 102 and the right longitudinal beam connecting plate 103 facilitates a reliable connection with the left and right longitudinal beams of the vehicle frame.

[0032] Specifically, in this embodiment, both the left longitudinal beam connecting plate 102 and the right longitudinal beam connecting plate 103 are U-shaped structural plates. The two flanges of the left longitudinal beam connecting plate 102 are respectively fixed to the top surface of the upper flange and the bottom surface of the lower flange of the I-shaped supporting beam 1, and the two flanges of the right longitudinal beam connecting plate 103 are respectively fixed to the top surface of the upper flange and the bottom surface of the lower flange of the I-shaped supporting beam 1. More specifically, the opening directions of both the left longitudinal beam connecting plate 102 and the right longitudinal beam connecting plate 103 are arranged along the length direction of the I-shaped supporting beam 1. The upper flange of the left longitudinal beam connecting plate 102 is fixed to the upper flange of the supporting beam 1 with bolts. The lower flange of the left longitudinal beam connecting plate 102 is fixed to the lower flange of the supporting beam 1 with bolts. The upper flange of the right longitudinal beam connecting plate 103 is fixed to the upper flange of the supporting beam 1 with bolts. The lower flange of the right longitudinal beam connecting plate 103 is bolted to the lower flange of the supporting crossbeam 1. When installed with the frame, the web of the left longitudinal beam connecting plate 102 is bolted to the left longitudinal beam of the frame; the web of the left longitudinal beam connecting plate 103 is bolted to the right longitudinal beam of the frame. Thus, by setting U-shaped connecting plates at both ends of the I-beam supporting crossbeam 1, the connection strength and stiffness between the I-beam supporting crossbeam 1 and the frame longitudinal beams can be significantly improved. The double-sided fixing structure of the U-shaped connecting plate effectively disperses the vibration load transmitted by the suspension system, avoiding local stress concentration; thereby improving the problem of range extender vibration being transmitted to the frame. This connection structure is particularly suitable for commercial vehicles with range extenders that need to withstand large dynamic loads, and can help to better improve the vibration isolation performance of the suspension system.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rear suspension mounting device for a range extender, characterized in that, include: I-beam support beam (1), which is installed between the left and right longitudinal beams of the frame; The rear suspension mounting bracket (2) is fixed to the top of the upper flange of the I-beam support beam (1) and is used to install the rear suspension of the range extender.

2. The range extender rear suspension mounting device according to claim 1, characterized in that: The I-shaped support beam (1) is formed by two channel beams (101) fixed back to back with opposite opening directions.

3. The range extender rear suspension mounting device according to claim 2, characterized in that: A reinforcing plate (3) is fixedly attached to the upper surface of the upper flange of the I-shaped support beam (1), and the reinforcing plate (3) covers the joint left when the two channel beams (101) are fixedly attached.

4. The range extender rear suspension mounting device according to claim 3, characterized in that: The reinforcing plate (3) extends beyond the upper wing plate on both sides of the upper wing plate of the I-shaped support beam (1) in the width direction, and the extended parts are bent downward to form flanges (3a).

5. The range extender rear suspension mounting device according to claim 1, characterized in that: It also includes an L-shaped reinforcing plate (4) located below the rear suspension mounting bracket (2), the L-shaped reinforcing plate (4) having a vertical plate portion (4a) and a horizontal plate portion (4b), the vertical plate portion (4a) being fixed to the web of the I-shaped support beam (1), and the horizontal plate portion (4b) being fixed to the upper flange of the I-shaped support beam (1).

6. The range extender rear suspension mounting device according to claim 5, characterized in that: The L-shaped reinforcing plate (4) consists of two pieces, which are symmetrically arranged on the front and rear sides of the web of the I-shaped support beam (1).

7. The range extender rear suspension mounting device according to claim 5, characterized in that: The L-shaped reinforcing plate (4) has multiple reinforcing ribs (401) arranged along its own length direction.

8. The range extender rear suspension mounting device according to claim 1, characterized in that: The web of the I-shaped support beam (1) is provided with multiple weight-reducing holes (1a).

9. The range extender rear suspension mounting device according to claim 1, characterized in that: The two ends of the I-shaped support beam (1) are respectively fixed with a left longitudinal beam connecting plate (102) and a right longitudinal beam connecting plate (103).

10. The range extender rear suspension mounting device according to claim 9, characterized in that: The left longitudinal beam connecting plate (102) and the right longitudinal beam connecting plate (103) are both U-shaped structural plates. The two wing plates of the left longitudinal beam connecting plate (102) are respectively fixed to the top surface of the upper wing plate and the bottom surface of the lower wing plate of the I-shaped support beam (1), and the two wing plates of the right longitudinal beam connecting plate (103) are respectively fixed to the top surface of the upper wing plate and the bottom surface of the lower wing plate of the I-shaped support beam (1).

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