Two-stage independent suspension system and multi-shaft distributed driving vehicle

Abstract

The utility model provides a two-stage independent suspension system and a multi-shaft distributed driving vehicle. The suspension system comprises a main frame, a first shock absorber, an auxiliary frame, a second shock absorber and a suspension body which are sequentially arranged from top to bottom. The suspension body comprises a hub, a suspension swing arm and a driving motor, the hub is connected to the suspension swing arm, and the suspension swing arm is rotationally connected to the auxiliary frame through two second rotating shafts to form an independent suspension structure; the multi-axle distributed driving vehicle adopts the two-stage independent suspension system, and independent power distribution among hubs is realized through the hub motors mounted at the hubs, so that accurate torque control and quick response are realized; a steering machine is further installed in the two-stage independent suspension system of the vehicle, the wheel hub is controlled to rotate by being connected with a steering pull rod, and the vehicle is suitable for multi-shaft distributed driving vehicles with cross-country and high passing ability requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle suspension, in particular to a two-stage independent suspension system and a multi-axle distributed drive vehicle. Background Art

[0002] Off-road vehicles are typically designed to handle extreme driving conditions, such as mud, snow, and desert, and even operate in roadless areas. Traditional off-road vehicles, thanks to their non-load-bearing body structure and powerful four-wheel drive system, offer strong maneuverability and stability.

[0003] However, with the growing demand for off-road driving and increasing terrain complexity, existing shock absorber technology is gradually exposing its limitations in complex terrain conditions. For example, due to the limited shock absorber travel, traditional modification methods often cannot fully cope with complex terrain fluctuations, making it difficult to ensure vehicle stability and controllability in various off-road environments.

[0004] In order to solve the above problems, there is an urgent need for a vehicle including a two-stage independent suspension system and a multi-axle distributed drive layout to enhance the flexibility and adaptability of the vehicle. Utility Model Content

[0005] The purpose of the utility model is to provide a two-stage independent suspension system and a multi-axle distributed drive vehicle, so as to increase the stroke of the shock absorber and improve the stability of the vehicle.

[0006] The present invention provides a two-stage independent suspension system in a first aspect, comprising:

[0007] Main frame;

[0008] A sub-frame, wherein the main frame is connected to the sub-frame via a first rotating shaft, so that the main frame rotates relative to the sub-frame around the first rotating shaft; at least two first shock absorbers are provided between the main frame and the sub-frame for buffering relative movement between the main frame and the sub-frame; the first shock absorbers are symmetrically distributed on both sides of the first rotating shaft;

[0009] The suspension body is fixedly mounted on the sub-frame. At least two second shock absorbers are provided between the sub-frame and the suspension body for buffering the relative movement between the sub-frame and the suspension body.

[0010] Specifically, the first shock absorber is vertically or obliquely arranged between the main frame and the sub-frame, and the second shock absorber is obliquely arranged between the sub-frame and the suspension body; the suspension body includes two second rotating shafts, and the suspension body is rotationally connected to the sub-frame through the second rotating shafts to form an independent suspension structure.

[0011] Preferably, the suspension body includes a wheel hub, a suspension swing arm and a drive motor, the wheel hub is connected to the suspension swing arm, and the suspension swing arm is rotationally connected to the sub-frame through the second rotating shaft.

[0012] Furthermore, the second shock absorber is arranged between the suspension swing arm and the subframe.

[0013] In a second aspect, the utility model provides a multi-axle distributed drive vehicle with a two-stage independent suspension, which includes at least two two-stage independent suspension systems, a drive motor and a steering gear. The two-stage independent suspension system includes a main frame and a suspension body arranged in sequence from top to bottom, at least one first shock absorber is provided between the main frame and the suspension body, and at least one second shock absorber is provided on the suspension body.

[0014] Preferably, the suspension body includes a wheel hub, a suspension swing arm and a suspension box, the wheel hub is connected to the suspension swing arm, and the suspension swing arm is rotatably connected to the suspension box; the second shock absorber is arranged between the suspension swing arm and the suspension box.

[0015] Furthermore, the drive motor includes a hub motor, and each hub is provided with at least one hub motor.

[0016] Furthermore, the suspension swing arm includes an upper swing arm, a steering rod and a lower swing arm; the lower end of the second shock absorber is connected to the lower swing arm, and the upper end is connected to the suspension box.

[0017] Furthermore, the suspension box is provided with a flange, and the upper end of the second shock absorber is connected to the flange.

[0018] Preferably, the flange is arranged obliquely, and the second shock absorber is arranged obliquely between the lower arm and the flange.

[0019] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0020] First, the two-stage independent suspension system of this utility model enables the vehicle to adapt to a variety of complex road conditions. By placing a first shock absorber between the main frame and subframe, and a second shock absorber between the subframe and the suspension body, a two-stage vibration reduction effect is achieved. This solution provides a wider range of vibration reduction travel, making the suspension system more adaptable to the impact of complex terrain, thereby improving the vehicle's driving comfort in off-road conditions. It also provides greater maneuverability when traversing rough or extreme terrain, while maintaining the vehicle's balance, significantly improving the vehicle's handling stability.

[0021] Second, each wheel of the two-stage independent suspension multi-axle distributed drive vehicle of the present invention is equipped with a drive motor, and more preferably, by adopting a hub motor, more precise torque control can be achieved, and different wheels can achieve differential steering through speed differences; the independent drive of each wheel is achieved through the distributed drive system, making the vehicle's torque distribution more precise. Compared with traditional four-wheel drive, this design enables the vehicle to adjust the torque distribution more flexibly when driving at high speed or making sharp turns, thereby improving the vehicle's stability and handling performance under complex road conditions.

[0022] Third, the two-stage independent suspension multi-axle distributed drive vehicle of the utility model includes at least two two-stage independent suspension systems, which enables the vehicle to be configured with multiple axles, improves the overall load-bearing capacity, and can be flexibly assembled into chassis with various drive forms such as 4×4, 6×6, 8×8 according to needs to adapt to different application scenarios; the multi-axle design is combined with a distributed drive system of multiple drive motors to achieve more flexible steering; the multi-axle drive system can also achieve more precise torque control, which can achieve more flexible steering and more stable driving in high-speed driving and sharp turns; and this solution is particularly suitable for heavy-loaded off-road vehicles, so that they have stronger stability and higher off-road performance in complex terrain, while ensuring driving safety and reliability.

[0023] Fourth, the first shock absorbers of the present invention are evenly distributed on both sides of the first rotating shaft, distributing vibration and impact forces evenly. This prevents lateral deviation or tilting caused by uneven force on one side, ensuring smoother and more controlled movement between the main frame and subframe, and improving vehicle stability. The symmetrical distribution of the first shock absorbers more effectively supports the main frame and subframe, reducing localized stress concentrations that can occur due to eccentric force. This design reduces wear on the rotating shaft and other connecting components, extending the service life of the suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic structural diagram of a two-stage independent suspension system according to a first embodiment of the present invention;

[0026] Figure 2 This is a structural schematic diagram of a two-stage independent suspension multi-axle distributed drive vehicle according to the second embodiment of the present utility model.

[0027] Description of Reference Numerals

[0028] 1. Main frame; 2. First shock absorber; 3. First rotating shaft; 4. Subframe; 5. Second shock absorber; 6. Suspension body; 61. Wheel hub; 611. Steering knuckle; 612. Wheel rim; 62. Suspension swing arm; 621. Upper swing arm; 622. Lower swing arm; 623. Steering rod; 63. Suspension box; 7. Drive motor; 71. Wheel hub motor; 8. Steering gear. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] The following describes the implementation of the present invention through specific concrete examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The present invention can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; in this application, off-road vehicles are used as the preferred embodiment of the two-stage independent suspension system, but various types of vehicles in other embodiments can adopt the two-stage independent suspension system of the utility model.

[0031] In the existing technology, due to the limited shock absorber travel, traditional modification methods are often unable to fully cope with complex terrain fluctuations, and it is difficult to ensure the vehicle's driving stability and controllability in various off-road environments; based on this, the embodiment of this specification proposes a solution: this solution adopts a two-stage independent suspension system in conjunction with a multi-axis distributed drive system to achieve good vehicle passability and flexible steering.

[0032] Example 1:

[0033] like Figure 1As shown, this embodiment provides a two-stage independent suspension system, which is particularly suitable for off-road vehicles. The two-stage independent suspension system includes a main frame 1, a subframe 4, a suspension body, and at least two shock absorbers. The shock absorbers include a first shock absorber 2 and a second shock absorber 5. From top to bottom, the two-stage independent suspension system consists of the main frame 1, the first shock absorber 2, the subframe 4, the second shock absorber 5, and the suspension body. The main frame 1 is connected to the subframe 4 via a first rotating shaft 3, and the first shock absorbers 2 are symmetrically distributed on both sides of the first rotating shaft 3. The first shock absorber 2 and the second shock absorber 5 are preferably elastic shock absorbers. The two-stage shock absorbers increase the damping stroke of the suspension system, thereby increasing the damping effect and enhancing the overall stability of the vehicle. The two-stage independent suspension system of this solution is an independent suspension, allowing each wheel to move up and down independently. When driving on uneven roads, each wheel can independently adapt to the undulations of the road surface without transmitting vibrations to the entire vehicle body, thereby maintaining vehicle stability. This greatly improves the vehicle's maneuverability when cornering or navigating bumps, thereby reducing the risk of rollover.

[0034] In a preferred embodiment, refer again to Figure 1 The suspension body includes a wheel hub 61, a suspension swing arm 62 and a drive motor 7. The wheel hub 61 is connected to the suspension swing arm 62, and the suspension swing arm 62 is rotatably connected to the subframe 4 through a second rotating shaft to form an independent suspension structure; preferably, the number of the first shock absorber 2 and the second shock absorber 5 is 2, and the second shock absorber 5 is arranged between the suspension swing arm 62 and the subframe 4.

[0035] It should be understood that the first shock absorber in this embodiment can be arranged vertically or obliquely, and since the second shock absorber is installed inside the independent suspension and the space is small, it is preferably arranged obliquely; and the second shock absorber first bears the impact of the vehicle. Under complex road conditions, the obliquely arranged shock absorber can more effectively support the suspension system when the vehicle rises and falls or turns, and provide stronger lateral stability when turning or rolling, thereby improving the vehicle's handling, which is particularly suitable for special vehicles traveling on complex terrain.

[0036] Example 2:

[0037] Based on Example 1, a multi-axle distributed drive vehicle with a two-stage independent suspension is further designed. The vehicle includes three two-stage independent suspension systems and a drive motor 7. The two-stage independent suspension system includes a main frame 1 and a suspension body arranged in sequence from top to bottom. Two first shock absorbers 2 are provided between the main frame 1 and the suspension body, and two second shock absorbers 5 are provided on the suspension body.

[0038] It should be noted that, in this embodiment, the suspension box 63 acts as the subframe 4 and the suspension body 6, and the multi-axis distribution means that the vehicle includes more than two two-stage independent suspension systems, which can turn more flexibly; in this embodiment, the two two-stage independent suspension systems are only preferred, and in other embodiments, three or more two-stage independent suspension systems can be used to form the suspension of a multi-axis distributed drive vehicle.

[0039] In a preferred embodiment, the suspension body includes a wheel hub 61, a suspension swing arm 62 and a suspension box 63, the wheel hub 61 includes a steering knuckle 611 and a wheel rim 612, the wheel hub 61 is connected to the suspension swing arm 62 through the steering knuckle 611, and the suspension swing arm 62 is rotatably connected to the suspension box 63; the second shock absorber 5 is arranged between the suspension swing arm 62 and the suspension box 63; the suspension swing arm 62 includes an upper swing arm 621 and a lower swing arm 622; the lower end of the second shock absorber 5 is connected to the lower swing arm 622, and the upper end is connected to the suspension box 63; the suspension box 63 is provided with a flange, and the upper end of the second shock absorber 5 is connected to the flange; the flange is arranged obliquely, and the second shock absorber 5 is arranged obliquely between the lower swing arm 622 and the flange.

[0040] In a preferred embodiment, to achieve power distribution among the wheel hubs 61, compared to the two-stage independent suspension system of Example 1, this embodiment replaces the drive motor 7 with an in-wheel motor 71, which is directly mounted on the wheel hub 61. By independently controlling the power output of each wheel hub 61, precise control of the torque of each wheel hub 61 is achieved. The distributed drive system with the in-wheel motor 71 is more responsive, facilitates real-time power adjustment in complex terrain, and ensures the stability and flexibility of the vehicle under different road conditions. Preferably, a steering gear 8 is provided in the suspension box 63, and the suspension swing arm 62 also includes a steering rod 623. The steering gear 8 is connected to the steering rod 623 to control the rotation of the wheel hub 61. The combination of the independent in-wheel motor 71 and the steering gear 8 enables independent operation of power distribution and steering control for each wheel, thereby enhancing the off-road maneuverability of the vehicle. Each wheel can adjust power and steer independently according to real-time demand, ensuring that the vehicle maintains high handling stability in rugged or extreme terrain. It should be understood that the use of the in-wheel motor 71 in this embodiment is merely preferred and should not be construed as limiting the scope of protection of the independent claims of the utility model.

[0041] It should be understood that in this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments; in particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the aforementioned embodiments.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A two-stage independent suspension system, characterized in that: include: Main frame; A sub-frame, wherein the main frame is connected to the sub-frame via a first rotating shaft, so that the main frame rotates relative to the sub-frame around the first rotating shaft; at least two first shock absorbers are provided between the main frame and the sub-frame for buffering relative movement between the main frame and the sub-frame; the first shock absorbers are symmetrically distributed on both sides of the first rotating shaft; A suspension body is fixedly mounted on the sub-frame, and at least two second shock absorbers are provided between the sub-frame and the suspension body for buffering the relative movement between the sub-frame and the suspension body; Specifically, the first shock absorber is vertically or obliquely arranged between the main frame and the sub-frame, and the second shock absorber is obliquely arranged between the sub-frame and the suspension body; the suspension body includes two second rotating shafts, and the suspension body is rotationally connected to the sub-frame through the second rotating shafts to form an independent suspension structure.

2. The two-stage independent suspension system according to claim 1, characterized in that: The suspension body includes a wheel hub, a suspension swing arm and a drive motor. The wheel hub is connected to the suspension swing arm, and the suspension swing arm is rotationally connected to the sub-frame through the second rotating shaft.

3. The two-stage independent suspension system according to claim 2, characterized in that: The second shock absorber is arranged between the suspension arm and the subframe.

4. A multi-axle distributed drive vehicle with two-stage independent suspension, characterized in that: It includes at least two two-stage independent suspension systems, a drive motor and a steering gear. The two-stage independent suspension system includes a main frame and a suspension body arranged in sequence from top to bottom. At least one first shock absorber is provided between the main frame and the suspension body, and at least one second shock absorber is provided on the suspension body.

5. The multi-axle distributed drive vehicle with two-stage independent suspension according to claim 4, characterized in that: The suspension body includes a wheel hub, a suspension swing arm and a suspension box, the wheel hub is connected to the suspension swing arm, and the suspension swing arm is rotatably connected to the suspension box; the second shock absorber is arranged between the suspension swing arm and the suspension box.

6. The multi-axle distributed drive vehicle with two-stage independent suspension according to claim 5, characterized in that: The drive motor includes a hub motor, and each wheel hub is provided with at least one hub motor.

7. The multi-axle distributed drive vehicle with two-stage independent suspension according to claim 5, characterized in that: The suspension swing arm includes an upper swing arm, a steering rod and a lower swing arm; the lower end of the second shock absorber is connected to the lower swing arm, and the upper end is connected to the suspension box.

8. The multi-axle distributed drive vehicle with two-stage independent suspension according to claim 7, characterized in that: The suspension box is provided with a flange, and the upper end of the second shock absorber is connected to the flange.

9. The multi-axle distributed drive vehicle with two-stage independent suspension according to claim 8, characterized in that: The flange is arranged obliquely, and the second shock absorber is arranged obliquely between the lower swing arm and the flange.

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