Semitrailer walking mechanism with electric drive axle

Abstract

The utility model discloses a semitrailer walking mechanism with an electric drive axle, and belongs to the technical field of trailers. The air suspension comprises a connecting frame and a plurality of air suspensions which are distributed along the length direction of the connecting frame, wherein the air suspensions at least comprise electric drive axle suspensions; the electric drive axle suspension comprises a drive axle housing, the drive axle housing comprises a first section and second sections located on the two sides of the first section, and the height size of the first section is larger than that of the second sections; wherein the second section is connected with a guide arm assembly, and the drive axle housing is connected with the connecting frame through the guide arm assembly; a mounting space is formed on the first section, and a power source is arranged in the mounting space; and the power source is connected with the tire assembly positioned at the free end of the second section. The specific structure of the drive axle housing is optimally designed, so that the drive axle housing can be provided with a power source, and autonomous driving force can be provided for the whole semitrailer walking mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of trailer technology, and more specifically, relates to a semi-trailer traveling mechanism with an electric drive axle. Background Technology

[0002] A trailer is a vehicle towed by a car but without its own power drive. It is a combination of a car (truck, tractor, or forklift) and one or more trailers. The truck and the tractor are the driving sections of the truck train, called the tractor unit, and the driven sections towed by the tractor unit are called trailers.

[0003] Traditional trailer running gear consists of wheels, axles, and suspension. The axles are connected to the chassis via the suspension; the wheels are mounted at both ends of the axles. The suspension's function is to transmit forces and torques between the wheels and the chassis, and to buffer the impact forces transmitted from uneven road surfaces to the chassis or body, damping the resulting vibrations to ensure smooth vehicle movement. However, because traditional trailer running gear is mostly a non-powered structure, lacking independent drive and braking capabilities and relying solely on the tractor's drive system, it suffers from problems such as braking delay, high energy consumption, and inability to move independently, while also increasing the risk of slippage when going uphill or downhill.

[0004] A search revealed a detachable trailer running gear in patent CN219770002U. This application includes a suspension assembly with two suspension connecting pipes welded to its top. Suspension connecting plates are welded to opposite sides of each connecting pipe, and a crossbeam is welded between the opposite sides of the two connecting plates. A frame longitudinal beam is welded to one side of each connecting plate, and a set of bolts is installed on one side of each connecting plate. The running gear assembly is fixed to the bottom of the two longitudinal beams by multiple sets of bolts. This application changes the traditional welded chassis to a bolted, detachable chassis, enabling quick assembly and disassembly, improving transportation efficiency, and reducing vehicle operating costs. However, the trailer running gear in this application remains a non-powered structure and lacks autonomous drive and braking capabilities. Utility Model Content

[0005] 1. The problem to be solved

[0006] In view of at least some of the problems existing in the prior art, this utility model proposes a semi-trailer traveling mechanism with an electric drive axle, the purpose of which is to solve a series of defects caused by the lack of active drive capability in the existing trailer traveling mechanism.

[0007] 2. Technical Solution

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] The present invention provides a semi-trailer traveling mechanism with an electric drive axle, comprising a connecting frame and a plurality of air suspensions distributed along the length of the connecting frame, wherein the air suspensions include at least an electric drive axle suspension.

[0010] The electric drive axle suspension includes a drive axle housing, which comprises a first section and second sections located on both sides of the first section, wherein the height of the first section is greater than that of the second section; wherein,

[0011] The second section is connected to a guide arm assembly, and the drive axle housing is connected to the connecting frame through the guide arm assembly;

[0012] An installation space is formed on the first segment, and a power source is provided in the installation space; the power source is connected to the tire assembly located at the free end of the second segment.

[0013] In some embodiments, the guide arm assembly includes a guide arm disposed at the bottom of the second section, one end of which is connected to the connecting frame via a guide arm bracket, and the other end of which is connected to the connecting frame via an air spring.

[0014] In some embodiments, a shock absorber is provided between the guide arm and the connecting frame, and the shock absorber is vertically distributed.

[0015] In some embodiments, a thrust rod is hinged to the top of the first segment, and the other end of the thrust rod is hinged to the connecting frame, with the thrust rod being inclined as a whole.

[0016] In some embodiments, the connecting frame includes a pair of longitudinal beams arranged opposite each other, each longitudinal beam having an upright plate connected to its opposite side, and a plurality of crossbeams provided between the two upright plates; wherein,

[0017] The bottom area of ​​the longitudinal beam is larger than the bottom area of ​​the vertical plate, and it is used to connect with the guide arm bracket, air spring and shock absorber.

[0018] The side surface area of ​​the upright plate is larger than that of the longitudinal beam, and it is used to connect with the thrust rod. The upright plate is also provided with fasteners for connecting the semi-trailer frame.

[0019] In some embodiments, an oblique support is also provided between the crossbeam and the guide arm bracket.

[0020] In some implementations, the two guide arm supports of the same air suspension are connected by a stabilizer plate.

[0021] In some embodiments, the air suspension is provided in three parts, including two unpowered suspensions and one electric drive axle suspension; wherein the electric drive axle suspension is located between the two unpowered suspensions.

[0022] In some embodiments, the end of the connecting frame is provided with a gas storage tank.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] (1) The present invention provides a semi-trailer traveling mechanism with an electric drive axle. By optimizing the specific structure of the drive axle housing, an installation space can be formed on it. The installation space is equipped with a power source, which can provide autonomous driving force for the entire semi-trailer traveling mechanism, thereby solving a series of defects caused by the lack of traditional trailers. On the other hand, it expands the space for the power source, which not only effectively improves the utilization rate of the vehicle space, but also lays the foundation for realizing the long range requirement of the vehicle.

[0026] (2) The semi-trailer traveling mechanism with electric drive axle of this utility model has a shock absorber that is set vertically, which can maximize its mechanical performance advantages in the vertical direction and directly and efficiently absorb and buffer the vertical impact from the road surface; it can effectively reduce the intensity and frequency of vibration transmitted to the vehicle body, and greatly improve the ride comfort and driving stability of the whole vehicle. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a semi-trailer traveling mechanism with an electrically driven axle according to the present invention;

[0028] Figure 2 This is a top view of a semi-trailer traveling mechanism with an electrically driven axle according to the present invention.

[0029] Figure 3 This is a schematic diagram of the electric drive axle suspension in this utility model;

[0030] Figure 4 This is a schematic diagram of the assembly between the drive axle housing and the power source in this utility model;

[0031] Figure 5 This is a schematic diagram of the connecting frame in this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the unpowered suspension in this utility model.

[0033] In the diagram: 100a, electric drive axle suspension; 100b, unpowered suspension; 110, drive axle housing; 111, first section; 112, second section; 121, guide arm; 122, guide arm bracket; 123, air spring; 124, shock absorber; 125, thrust rod; 130, tire assembly; 140, power source;

[0034] 200. Connecting frame; 210. Longitudinal beam; 220. Vertical plate; 230. Horizontal beam; 240. Stabilizing plate; 250. Fastener; 260. Diagonal support; 300. Gas storage tank. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] The present invention will be further described below with reference to specific embodiments.

[0038] like Figure 1 , Figure 2 As shown, a semi-trailer traveling mechanism with an electric drive axle according to this embodiment includes a connecting frame 200 and a plurality of air suspensions distributed along the length of the connecting frame 200; wherein, the air suspension includes at least an electric drive axle suspension 100a, used to provide automatic driving force for the entire semi-trailer traveling mechanism. Meanwhile, an air tank 300 is provided at the end of the connecting frame 200.

[0039] like Figure 3 , Figure 4 As shown, the electric drive axle suspension 100a includes a drive axle housing 110, a guide arm assembly, a tire assembly 130, and a power source 140. The drive axle housing 110 includes a first section 111 and second sections 112 located on either side of the first section 111, with the first section 111 being larger in height than the second section 112. The guide arm assembly is mounted on the second section 112, and the drive axle housing 110 is connected to the connecting frame 200 via this guide arm assembly. The tire assembly 130 is also connected to the free end of the second section 112.

[0040] Because the first segment 111 is relatively large in the height direction, an installation space can be formed on the first segment 111. A power source 140 is installed in the installation space, which is connected to the tire assembly 130, thereby providing autonomous driving force for the entire semi-trailer traveling mechanism.

[0041] This embodiment of a semi-trailer traveling mechanism with an electric drive axle provides autonomous driving force to the entire semi-trailer traveling mechanism by incorporating a power source 140 in the drive axle housing 110, thus overcoming a series of shortcomings caused by the lack of such a capability in traditional trailers. Furthermore, the power source 140 is positioned within the installation space of the drive axle housing 110, effectively expanding the space available for power source placement. This not only improves the overall space utilization of the vehicle but also lays the foundation for achieving the vehicle's long-range driving requirements.

[0042] In some embodiments, reference Figure 3 As shown, the guide arm assembly includes a guide arm 121, which is horizontally positioned at the bottom of the second section 112, and the axis of the guide arm 121 is perpendicular to the axis of the drive axle housing 110. Guide arm brackets 122 and air springs 123 are respectively connected to the two ends of the guide arm 121, and the tops of both the guide arm bracket 122 and the air springs 123 are connected to the connecting frame 200.

[0043] In some embodiments, a shock absorber 124 is provided between the guide arm 121 and the connecting frame 200. Preferably, the shock absorber 124 is vertically distributed to maximize its mechanical performance advantages in the vertical direction, and can directly and efficiently absorb and buffer vertical impacts from the road surface to reduce the intensity and frequency of vibrations transmitted to the vehicle body, thereby significantly improving the ride comfort and driving stability of the entire vehicle.

[0044] In some embodiments, a thrust rod 125 is further provided between the drive axle housing 110 and the connecting frame 200, and the thrust rod 125 is inclined to improve the vehicle's anti-roll performance. Specifically, one end of the thrust rod 125 is hinged to the mounting seat at the top of the first section 111, and the other end is hinged to the connecting frame 200 through the mounting seat.

[0045] Preferably, the thrust rod 125 is horizontally positioned.

[0046] refer to Figure 5 As shown, the connecting frame 200 in this embodiment includes a pair of longitudinal beams 210 arranged opposite each other. Each of the opposite sidewalls of the longitudinal beams 210 is connected to a vertical plate 220, and a plurality of crossbeams 230 are provided between the two vertical plates 220. This design makes the longitudinal beams 210 and the vertical plates 220 form an L-shaped structure to facilitate the connection operation with the guide arm assembly.

[0047] Specifically, since the bottom area of ​​the longitudinal beam 210 is larger than the bottom area of ​​the vertical plate 220, the guide arm bracket 122, the air spring 123, and the shock absorber 124 can be connected to the bottom of the longitudinal beam 210. Since the side area of ​​the vertical plate 220 is larger than the side area of ​​the longitudinal beam 210, the thrust rod 125 can be connected to the inner wall of the vertical plate 220.

[0048] Meanwhile, a series of fasteners 250 are also provided on the upright plate 220 along its length. Preferably, the fasteners 250 can be fastening bolts. For assembly, the semi-trailer frame is first placed on the longitudinal beam 210, and then the fasteners 250 are used to lock the semi-trailer frame to the upright plate 220, so as to realize quick assembly and disassembly between the semi-trailer frame and the connecting frame 200.

[0049] In some embodiments, a diagonal support 260 is provided between the crossbeam 230 and the guide arm bracket 122; at the same time, the two guide arm brackets 122 of the same air suspension are connected by a stabilizing plate 240 to further ensure the stability of the connection between the guide arm assembly and the connecting frame 200.

[0050] This embodiment of a semi-trailer running gear with an electric drive axle may include an air suspension system that, in addition to the electric drive axle suspension 100a, also includes a non-powered suspension 100b. (See reference) Figure 6 As shown, the structure of the unpowered suspension 100b and the electric drive axle suspension 100a is basically the same, with the biggest difference being the specific structure of the drive axle housing 110.

[0051] Specifically, the unpowered suspension 100b includes a drive axle housing 110 and a guide arm assembly; wherein, the drive axle housing 110 is a conventional connecting shaft, and no mounting space is provided on it for mounting the power source 140. The two free ends of the drive axle housing 110 are also connected to the tire assembly 130.

[0052] The guide arm assembly includes a guide arm 121 and a shock absorber 124. The guide arm 121 is horizontally positioned at the bottom of the second section 112, and its axis is perpendicular to the axis of the drive axle housing 110. A guide arm bracket 122 and an air spring 123 are respectively connected to the two ends of the guide arm 121. The tops of both the guide arm bracket 122 and the air spring 123 are connected to the connecting frame 200. One end of the shock absorber 124 is connected to the guide arm 121, and the other end is connected to the connecting frame 200.

[0053] Specifically, in this embodiment, three air suspensions are provided, including two unpowered suspensions 100b and one electric drive axle suspension 100a; wherein the electric drive axle suspension 100a is positioned between the two unpowered suspensions 100b. The center distance L2 of the air suspensions is 1024mm; the wheelbase L1 is 1310mm.

[0054] 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. A semi-trailer traveling mechanism with an electric drive axle, comprising a connecting frame (200) and a plurality of air suspensions distributed along the length of the connecting frame (200), characterized in that: The air suspension includes at least an electric drive axle suspension (100a); The electric drive axle suspension (100a) includes a drive axle housing (110), which includes a first section (111) and a second section (112) located on both sides of the first section (111), wherein the height of the first section (111) is greater than that of the second section (112); wherein, The second segment (112) is connected to a guide arm assembly, and the drive axle housing (110) is connected to the connecting frame (200) through the guide arm assembly; An installation space is formed on the first segment (111), and a power source (140) is provided in the installation space; the power source (140) is connected to a tire assembly (130) located at the free end of the second segment (112).

2. The semi-trailer traveling mechanism with an electrically driven axle according to claim 1, characterized in that: The guide arm assembly includes a guide arm (121) disposed at the bottom of the second section (112). One end of the guide arm (121) is connected to the connecting frame (200) via a guide arm bracket (122), and the other end is connected to the connecting frame (200) via an air spring (123).

3. The semi-trailer traveling mechanism with an electrically driven axle according to claim 2, characterized in that: A shock absorber (124) is provided between the guide arm (121) and the connecting frame (200), and the shock absorber (124) is vertically distributed.

4. The semi-trailer traveling mechanism with an electrically driven axle according to claim 3, characterized in that: The top of the first segment (111) is hinged with a thrust rod (125), and the other end of the thrust rod (125) is hinged to the connecting frame (200). The thrust rod (125) is inclined as a whole.

5. The semi-trailer traveling mechanism with an electrically driven axle according to claim 4, characterized in that: The connecting frame (200) includes a pair of longitudinal beams (210) arranged opposite to each other, each longitudinal beam (210) having a vertical plate (220) connected to its opposite side, and a plurality of crossbeams (230) provided between the two vertical plates (220); wherein, The bottom area of ​​the longitudinal beam (210) is larger than the bottom area of ​​the vertical plate (220), and it is used to connect with the guide arm bracket (122), the air spring (123) and the shock absorber (124); The side surface area of ​​the upright plate (220) is larger than that of the longitudinal beam (210), and it is used to connect with the thrust rod (125). The upright plate (220) is also provided with fasteners (250) for connecting the semi-trailer frame.

6. The semi-trailer traveling mechanism with an electrically driven axle according to claim 5, characterized in that: An oblique support (260) is also provided between the crossbeam (230) and the guide arm bracket (122).

7. A semi-trailer traveling mechanism with an electrically driven axle according to claim 5, characterized in that: The two guide arm supports (122) of the same air suspension are connected by a stabilizer plate (240).

8. A semi-trailer traveling mechanism with an electrically driven axle according to any one of claims 1-7, characterized in that: The air suspension system has three components, including two unpowered suspensions (100b) and one electric drive axle suspension (100a); wherein the electric drive axle suspension (100a) is positioned between the two unpowered suspensions (100b).

9. A semi-trailer traveling mechanism with an electrically driven axle according to claim 8, characterized in that: The end of the connecting frame (200) is provided with a gas storage tank (300).

Images