Electric drive axle air suspension system

Abstract

The utility model discloses an air suspension system of an electric drive axle, and belongs to the technical field of vehicle suspensions. The drive axle housing assembly comprises a drive axle housing, a suspension assembly and a frame, the suspension assembly comprises a pair of guide arms arranged on the drive axle housing; wherein the first end part of the guide arm is connected with a guide arm bracket, and the second end part of the guide arm is connected with an air spring; a thrust rod assembly is connected between the pair of guide arms and comprises a suspension support and a rotating disc arranged on the suspension support. Wherein the two ends of the suspension support are connected with the ends of the guide arms respectively, the rotating disc is connected with two thrust rods which are horizontally distributed, and the free ends of the two thrust rods extend in the opposite directions and are connected with a vehicle frame support. According to the electric drive axle air suspension, the thrust rod is used for rigidly supporting the frame, the rigidity of the rotating disc can be used for further improving the roll rigidity of the suspension, and therefore the electric drive axle air suspension can be driven more stably.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle suspension technology, and more specifically, relates to an electric drive axle air suspension system. Background Technology

[0002] A vehicle's running system typically includes wheels, a frame, axles, and suspension. The axles are connected to the frame via the suspension. Wheels are mounted at both ends of the axles. The suspension's function is to transmit forces and torques acting between the wheels and the frame, and to cushion impacts from uneven road surfaces transmitted to the frame or body, damping the resulting vibrations to ensure a smooth ride.

[0003] In recent years, air suspension has been widely used in the automotive industry due to its excellent comfort and stability, low impact on roads and bridges, and ability to extend the service life of vehicles and their components. An air suspension system typically consists of components such as an axle, guide arms, a support assembly, a bracket, and air springs. One end of the guide arm is connected to the vehicle frame via a bracket, and the other end is connected to the air spring. The middle of the guide arm is connected to the support assembly and the axle via a fixing assembly. However, existing air suspension systems have limited roll stiffness, posing a certain risk of rollover when vehicles undergo emergency lane changes or encounter large lateral forces.

[0004] A search revealed a patent, CN222223849U, which discloses an anti-roll air suspension system. In this application, a locating pin is installed at the bottom of the fixed arm to position the fixed arm and the lower support. Fasteners at both ends and the locating pin form a three-point stabilization structure. This three-point stabilization structure ensures the overall rigidity of the air suspension system, thereby guaranteeing the vehicle's anti-roll performance.

[0005] For example, patent CN218197806U discloses a commercial vehicle follow-up axle composite air suspension. In this application, by setting a V-shaped thrust rod, the lateral stiffness of the suspension system is improved while meeting the vehicle's load-bearing requirements, thereby helping to reduce the risk of vehicle rollover.

[0006] The above designs optimize air suspension from different directions and can effectively improve the roll stiffness of the suspension system, but the industry still needs more diverse and richer designs. Utility Model Content

[0007] 1. The problem to be solved

[0008] In view of at least some of the problems existing in the prior art, this utility model proposes an electric drive axle air suspension system, the purpose of which is to solve the problem that the existing air suspension system has limited roll stiffness and that the vehicle has a certain risk of rollover when changing lanes in an emergency or encountering a large lateral force.

[0009] 2. Technical Solution

[0010] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0011] This utility model discloses an electric drive axle air suspension system, including a drive axle housing, a suspension assembly, and a vehicle frame; the suspension assembly includes a pair of guide arms mounted on the drive axle housing; wherein, the first end of each guide arm is connected to a guide arm bracket, and the second end is connected to an air spring;

[0012] A thrust rod assembly is connected between the pair of guide arms. The thrust rod assembly includes a suspension support and a rotating disk mounted on the suspension support.

[0013] The two ends of the suspension support are respectively connected to the ends of the guide arm. Two horizontally distributed thrust rods are connected to the rotating disk. The free ends of the two thrust rods extend in opposite directions and are connected to the frame support.

[0014] In some embodiments, the rotating disk is rotatably mounted on one side of the suspension support; the thrust rod is hinged to the rotating disk and the frame support, and the hinge points between the rotating disk and the two thrust rods are symmetrically distributed vertically with the rotation point of the rotating disk as the center.

[0015] In some embodiments, the suspension support is connected to the second end of the guide arm, and the air spring is disposed on the suspension support.

[0016] In some embodiments, the guide arm is connected to the drive axle housing via a connecting assembly; the connecting assembly includes an upper support, a lower support, and fasteners; wherein,

[0017] The upper support and lower support cover the top and bottom of the guide arm, respectively. Fasteners are used to pass through the lower support, upper support and the fixing part on the drive axle housing in sequence to lock the drive axle housing and the guide arm together.

[0018] In some embodiments, a shock absorber is provided between the lower support and the frame, and the shock absorber is vertically arranged.

[0019] In some embodiments, a wear-resistant plate is provided between the upper support and / or lower support and the guide arm.

[0020] In some embodiments, the interior of the drive axle housing forms an installation space for mounting a power source.

[0021] In some embodiments, the frame includes a frame structure formed by a plurality of longitudinal beams and crossbeams; the bottom of the longitudinal beams is provided with a first connecting seat for connecting an air spring, and the outer side is provided with a second connecting seat for connecting a shock absorber.

[0022] In some embodiments, a pad is connected to the outer side of the longitudinal beam, and the lower surface of the longitudinal beam and the pad together form a mounting surface for connection with the guide arm bracket.

[0023] In some embodiments, a first reinforcing rib is provided between the pad and the longitudinal beam; a second reinforcing rib is provided between the two guide arm supports; and a third reinforcing rib is provided between the guide arm support and the longitudinal beam.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] (1) The electric drive axle air suspension system of this utility model, through the setting of the rotating disk and two thrust rods, can not only improve the lateral stiffness of the suspension by utilizing the rigid connection between the thrust rod and the vehicle frame, but also further improve the lateral stiffness of the suspension by utilizing the rigidity of the rotating disk itself, thereby making the electric drive axle air suspension drive more smoothly.

[0027] (2) The electric drive axle air suspension system of this utility model can effectively avoid the motion interference of the structure during the suspension stroke by optimizing the positional relationship between the hinge point of the thrust rod and the rotation center of the rotating disk itself, and also avoid the lateral movement of the axle caused by the up-and-down jump of the axle.

[0028] (3) The electric drive axle air suspension system of this utility model can ensure the stability of the connection between the guide arm and the drive axle housing by using the upper and lower supports to surround the guide arm. At the same time, wear-resistant plates are provided between the upper and lower supports and the guide arm, which can further improve the anti-slip coefficient between the guide arm and the drive axle housing.

[0029] (4) The electric drive axle air suspension system of this utility model forms an installation space in the middle area of ​​the drive axle housing. This installation space can be used to assemble a power source to expand the layout space of the power source. This not only effectively improves the space utilization of the whole vehicle, but also lays a solid foundation for realizing the long range requirement of the vehicle. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of an electric drive axle air suspension system according to the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of an electric drive axle air suspension system of this utility model after the vehicle frame has been removed;

[0032] Figure 3 This is a schematic diagram of the thrust rod assembly in this utility model;

[0033] Figure 4This is a schematic diagram of the assembly between the connecting component and the guide arm in this utility model;

[0034] Figure 5 This is a schematic diagram of the frame structure in this utility model;

[0035] Figure 6 This is a schematic diagram of the drive axle housing in this utility model.

[0036] In the diagram: 100, drive axle housing; 110, mounting space; 120, mounting part;

[0037] 200. Suspension assembly; 210. Guide arm; 220. Guide arm bracket; 230. Air spring; 240. Thrust rod assembly; 241. Suspension support; 242. Rotary disc; 243. Thrust rod; 244. Frame support; 250. Connecting assembly; 251. Upper support; 252. Lower support; 253. Fastener; 260. Shock absorber;

[0038] 300, Frame; 310, Longitudinal beam; 320, Crossbeam; 330, Pad; 340, First reinforcing rib; 350, Second reinforcing rib; 360, First connecting seat; 370, Second connecting seat; 380, Third reinforcing rib. Detailed Implementation

[0039] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] The present invention will be further described below with reference to specific embodiments.

[0042] like Figure 1 As shown in Figure 2, the electric drive axle air suspension system of this embodiment has the same basic structure as a conventional air suspension system, including a drive axle housing 100, a suspension assembly 200, and a frame 300. The two ends of the drive axle housing 100 are connected to the suspension assembly 200; the top of the suspension assembly 200 is connected to the frame 300; and the frame 300 is used for connection to a semi-trailer.

[0043] The suspension assembly 200 includes a pair of guide arms 210 mounted on the drive axle housing 100. Each guide arm 210 includes a first end for connecting to a guide arm bracket 220 and a second end for connecting to an air spring 230. The first and second ends extend towards both sides of the drive axle housing 100. That is, the guide arm bracket 220 and the air spring 230 are located on both sides of the drive axle housing 100 for connection to the vehicle frame 300.

[0044] In this embodiment, to improve the roll stiffness of the suspension system, a thrust rod assembly 240 is connected between the two guide arms 210. Specifically, refer to... Figure 3 As shown, the thrust rod assembly 240 includes a suspension support 241 and a rotating disk 242 mounted on the suspension support 241. Both ends of the suspension support 241 are connected to the ends of the guide arm 210. Two horizontally distributed thrust rods 243 are connected to the rotating disk 242. The free ends of the two thrust rods 243 extend in opposite directions and are connected to a frame support 244, which is used to connect to the vehicle frame 300.

[0045] In this embodiment, by setting up the rotating disk 242 and the two thrust rods 243, in addition to using the rigid connection between the thrust rods 243 and the frame 300 to improve the roll stiffness of the suspension, the rigidity of the rotating disk 242 itself can also be used to further improve the roll stiffness of the suspension, thereby making the electric drive axle air suspension drive more smoothly.

[0046] In some embodiments, the rotating disk 242 is rotatably mounted on one side of the suspension support 241, and the thrust rod 243 is hinged to the rotating disk 242 and the frame support 244. The specific rotation method and hinge method can adopt existing technology and are not specifically limited here.

[0047] Preferably, the hinge points between the rotating disk 242 and the two thrust rods 243 are symmetrically distributed vertically around the rotation point of the rotating disk 242 (i.e., the connection point between the rotating disk and the suspension support 241). This design allows the hinge points between the two thrust rods 243 and the rotating disk 242 to move within a certain range as the rotating disk 242 is subjected to lateral forces, enabling the two thrust rods 243 to form a Z-shaped structure. Figure 3 The dotted line structure in the design not only effectively avoids structural motion interference during suspension travel, but also prevents lateral axle movement caused by axle vertical jump.

[0048] In some embodiments, the suspension support 241 is connected to the second end of the guide arm 210, and the suspension support 241 is located between the guide arm 210 and the air spring 230. That is, the end of the suspension support 241 is located at the top of the guide arm 210, and the air spring 230 is located at the top of the suspension support 241.

[0049] This embodiment provides an electric drive axle air suspension system, which serves as a specific connection method between the guide arm 210 and the drive axle housing 100, such as... Figure 4 , Figure 6 As shown, the guide arm 210 is connected to the drive axle housing 100 via a connecting assembly 250. Specifically, the connecting assembly 250 includes an upper support 251, a lower support 252, and a fastener 253. The upper support 251 and the lower support 252 respectively cover the top and bottom of the guide arm 210 near the middle. The fastener 253 passes through the lower support 252, the upper support 251, and the fixing part 120 on the drive axle housing 100 in sequence, locking the drive axle housing 100 and the guide arm 210 together to ensure the stability of the connection between the guide arm 210 and the drive axle housing 100.

[0050] In this specific embodiment, the fastener 253 can be a bolt or nut. Of course, the upper support 251, the lower support 252, and the fixing part 120 all need to have assembly holes for the bolts to pass through.

[0051] In addition, a wear-resistant plate (not shown in the figure) is provided between the upper support 251, the lower support 252 and the guide arm 210. The wear-resistant plate is provided to further improve the anti-slip coefficient between the guide arm 210 and the drive axle housing 100.

[0052] In some implementations, vertically distributed shock absorbers 260 are also provided between the under-axle support 251 and the frame 300. In traditional suspension systems, the shock absorber 260 must bear not only vertical impact forces but also a certain amount of lateral forces. Therefore, the shock absorber 260 is generally installed at an angle.

[0053] In this embodiment, the lateral stiffness of the suspension can be effectively ensured by the arrangement of the rotating disk 242 and the two thrust rods 243. Therefore, where space permits, the shock absorber 260 can be vertically arranged, which can directly and more efficiently absorb and buffer vertical impacts from the road surface, effectively reducing the intensity and frequency of vibrations transmitted to the vehicle body, thereby significantly improving the overall ride comfort and driving stability of the vehicle.

[0054] refer to Figure 6As shown, in some optional embodiments, a mounting space 110 is formed in the middle region of the drive axle housing 100. This mounting space 110 can be used to assemble a power source, thereby expanding the space available for the power source. This not only effectively improves the overall vehicle space utilization but also lays a solid foundation for achieving the vehicle's long-range requirements.

[0055] like Figure 5 As shown, in this embodiment, as one implementation of the frame 300, the frame 300 is a frame structure composed of several longitudinal beams 310 and cross beams 320 to ensure the overall structural strength of the frame 300. A first connecting seat 360 for connecting the air spring 230 and a second connecting seat 370 for connecting the shock absorber 260 are provided on the longitudinal beams 310. Meanwhile, the guide arm bracket 220 and the frame support 244 are both fixed to the longitudinal beams 310.

[0056] Specifically, in this embodiment, the guide arm bracket 220, the frame support 244, and the first connecting seat 360 are all located at the bottom of the longitudinal beam 310; while the second connecting seat 370 is located on the outer side wall of the longitudinal beam 310.

[0057] In some embodiments, the bottom of the longitudinal beam 310 is connected to a pad 330 that extends outwards as a whole. The bottom surface of the pad 330 and the bottom surface of the longitudinal beam 310 together form a mounting surface, and the top surface of the guide arm bracket 220 is welded to this mounting surface. This not only ensures the effective mounting area between the guide arm bracket 220 and the frame 300, guaranteeing the stability of the connection between the two, but also allows the pad 330 to compensate for the deviation between the center distance of the two longitudinal beams and the center distance of the two guide arms.

[0058] In addition, to ensure the connection strength between the frame 300 and the suspension assembly 200, a first reinforcing rib 340 can be added between the pad 330 and the longitudinal beam 310; a second reinforcing rib 350 can be added between the two guide arm brackets 220; and a third reinforcing rib 380 can be added between the guide arm bracket 220 and the longitudinal beam 310.

[0059] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An electric drive axle air suspension system, comprising a drive axle housing (100), a suspension assembly (200), and a vehicle frame (300); said suspension assembly (200) includes a pair of guide arms (210) disposed on the drive axle housing (100); wherein, The first end of the guide arm (210) is connected to a guide arm bracket (220), and the second end is connected to an air spring (230); The feature is that a thrust rod assembly (240) is connected between the pair of guide arms (210), the thrust rod assembly (240) including a suspension support (241) and a rotating disk (242) disposed on the suspension support (241); wherein, The two ends of the suspension support (241) are respectively connected to the ends of the guide arm (210). Two horizontally distributed thrust rods (243) are connected to the rotating disk (242). The free ends of the two thrust rods (243) extend in opposite directions and are connected to the frame support (244).

2. The electric drive axle air suspension system according to claim 1, characterized in that: The rotating disk (242) is rotatably mounted on one side of the suspension support (241); the thrust rod (243) is hinged to the rotating disk (242) and the frame support (244), and the hinge points between the rotating disk (242) and the two thrust rods (243) are symmetrically distributed vertically with the rotation point of the rotating disk (242) as the center.

3. The electric drive axle air suspension system according to claim 2, characterized in that: The suspension support (241) is connected to the second end of the guide arm (210), and the air spring (230) is mounted on the suspension support (241).

4. An electric drive axle air suspension system according to any one of claims 1-3, characterized in that: The guide arm (210) is connected to the drive axle housing (100) via a connecting assembly (250); the connecting assembly (250) includes an upper support (251), a lower support (252), and fasteners (253); wherein, The upper support (251) and lower support (252) respectively cover the top and bottom of the guide arm (210), and the fastener (253) is used to pass through the fixing part (120) on the lower support (252), the upper support (251) and the drive axle housing (100) in sequence to lock the drive axle housing (100) and the guide arm (210) together.

5. The electric drive axle air suspension system according to claim 4, characterized in that: A shock absorber (260) is provided between the lower support (252) and the frame (300), and the shock absorber (260) is vertically arranged.

6. The electric drive axle air suspension system according to claim 4, characterized in that: A wear-resistant plate is provided between the upper support (251) and / or the lower support (252) and the guide arm (210).

7. The electric drive axle air suspension system according to claim 1, characterized in that: The interior of the drive axle housing (100) forms an installation space (110) for installing a power source.

8. The electric drive axle air suspension system according to claim 5, characterized in that: The frame (300) includes a frame structure formed by a plurality of longitudinal beams (310) and crossbeams (320); the bottom of the longitudinal beams (310) is provided with a first connecting seat (360) for connecting an air spring (230), and the outer side is provided with a second connecting seat (370) for connecting a shock absorber (260).

9. An electric drive axle air suspension system according to claim 8, characterized in that: A pad (330) is connected to the outer side of the longitudinal beam (310), and the lower surfaces of the longitudinal beam (310) and the pad (330) together form a mounting surface for connecting with the guide arm bracket (220).

10. An electric drive axle air suspension system according to claim 9, characterized in that: The pad (330) and the longitudinal beam (310) are provided with a first reinforcing rib (340); the two guide arm supports (220) are provided with a second reinforcing rib (350); and the guide arm support (220) and the longitudinal beam (310) are provided with a third reinforcing rib (380).

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