CN219312860U - Frame and car - Google Patents
Frame and car Download PDFInfo
- Publication number
- CN219312860U CN219312860U CN202320174042.1U CN202320174042U CN219312860U CN 219312860 U CN219312860 U CN 219312860U CN 202320174042 U CN202320174042 U CN 202320174042U CN 219312860 U CN219312860 U CN 219312860U
- Authority
- CN
- China
- Prior art keywords
- longitudinal
- frame
- cabin
- energy storage
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model relates to a frame and an automobile, which comprise an energy storage cabin and a power cabin, wherein the energy storage cabin comprises at least one mounting cross beam and a mounting longitudinal beam and is used for being connected with a battery pack; the power cabin comprises a first longitudinal beam and a first cross beam, one ends of the two first longitudinal beams are connected with the energy storage cabin, the other ends of the two first longitudinal beams are connected with the first cross beam, and the two first longitudinal beams are provided with at least two connecting hole sites for installing a power assembly. The battery pack can be installed to the installation crossbeam and the installation longeron in energy storage cabin, and the power cabin is connected with the energy storage cabin, and the relative connecting hole site constitutes a pair of on two first longerons, can be used to the power assembly of installation car. When power assemblies of different vehicle types are required to be installed, connecting hole positions which can be matched with the power cabin are determined according to the connecting positions on the power assemblies and are fixedly connected. The frame has strong adaptability, saves development of different power assembly vehicle types on the frame, and reduces development cost and period.
Description
Technical Field
The utility model relates to the technical field of automobile structures, in particular to a frame and an automobile.
Background
The frame is a frame structure that spans the front and rear axles of the vehicle. For different types of automobiles, the connection mode and the installation position of the power assembly and the frame are different, the general frame is difficult to be compatible with the power assemblies of various automobile types, and the carrying compatibility of the pure electric, extended range and fuel cell type power assemblies cannot be realized, so that the development cost of the automobile frame is high and the development period is long.
Disclosure of Invention
Based on the above, it is necessary to provide a vehicle frame with good compatibility, strong adaptability and low development cost, aiming at the problem that the vehicle frame cannot be compatible with power assemblies of different vehicle types.
A frame, the frame comprising:
the energy storage cabin comprises at least one mounting cross beam and a mounting longitudinal beam and is used for being connected with the battery pack;
the power cabin comprises a first longitudinal beam and a first cross beam, wherein one end of the first longitudinal beam is connected with the energy storage cabin, the other end of the first longitudinal beam is connected with the first cross beam, and the first longitudinal beam is provided with at least two connecting hole sites for installing a power assembly.
In one embodiment, the frame further comprises a connecting structure, and two ends of the connecting structure are detachably connected with the first longitudinal beams of the energy storage cabin and the power cabin respectively.
In one embodiment, the connecting structure is made of I-shaped structural steel, one end of the connecting structure is provided with a mounting surface, the mounting surface is connected with the energy storage cabin, and the other end of the connecting structure is connected with the first longitudinal beam of the power cabin.
In one embodiment, the frame further comprises a carrying cabin, the carrying cabin comprises a second longitudinal beam and a second transverse beam, one ends of the two second longitudinal beams are connected with the energy storage cabin, and the other ends of the two second longitudinal beams are connected with the second transverse beam.
In one embodiment, the power cabin further comprises a first connecting beam, wherein the first connecting beam is arranged between the two first longitudinal beams, and two ends of the first connecting beam are respectively connected with the two first longitudinal beams; and/or the number of the groups of groups,
the bearing cabin further comprises a second connecting beam, the second connecting beam is arranged between the two second longitudinal beams, and two ends of the second connecting beam are respectively connected with the two second longitudinal beams.
In one embodiment, the first connecting beam and/or the second connecting beam are/is made of I-shaped structural steel, and limiting plates are arranged at two ends of the first connecting beam and/or the second connecting beam and are in butt joint with the first longitudinal beam or the second longitudinal beam and are fixedly connected with the first longitudinal beam or the second longitudinal beam.
In one embodiment, the first longitudinal beam comprises a main body and first bending parts which are oppositely arranged, the first bending parts are longitudinally arranged on the main body, and the limiting plates of the first connecting beam are abutted with the first bending parts and fixedly connected; and/or the second longitudinal beam is provided with a second bending part which is oppositely arranged, and the limiting plate of the second connecting beam is abutted with the second bending part and fixedly connected with the second bending part.
In one embodiment, one end of each of the two first longitudinal beams is in threaded connection with the energy storage cabin, and the other end of each of the two first longitudinal beams is in threaded connection with the first cross beam; and/or the number of the groups of groups,
one end of each second longitudinal beam is in threaded connection with the energy storage cabin, and the other end of each second longitudinal beam is in threaded connection with the second cross beam.
In one embodiment, the mounting cross beam is provided with at least two first mounting holes, and the mounting longitudinal beam is provided with at least two second mounting holes for connection with a battery pack.
An automobile comprises the frame and
the front suspension assembly is provided with a front suspension connecting lug which is connected with the first longitudinal beam;
the rear suspension assembly is provided with a rear suspension connecting lug which is connected with the second longitudinal beam;
the front axle assembly is connected with the front suspension assembly;
a rear axle assembly connected with the rear suspension assembly;
the wheel comprises a front tire and a rear tire, wherein the front axle assembly comprises a front hub, the front hub is connected with the front tire, the rear axle assembly comprises a rear hub, and the rear hub is connected with the rear tire.
Above-mentioned frame, the installation crossbeam and the installation longeron in energy storage cabin can install the battery package, the power cabin with the energy storage cabin is connected, and two first longerons in power cabin all are equipped with the connection hole site, and every two relative connection hole sites constitute a pair, can be used to install the power assembly of car. When power assemblies of different vehicle types are required to be installed, connecting hole positions which can be matched with the power cabin are determined according to the connecting positions on the power assemblies and are connected and fixed, so that the compatibility of the power assemblies of different vehicle types is realized, and the installation requirements of pure electric, range-extending and fuel cell type power assemblies are met. The frame has strong adaptability, saves development of different power assembly vehicle types on the frame, and reduces development cost and period.
Drawings
FIG. 1 is a schematic view of a frame in an embodiment;
fig. 2 is an exploded schematic view of an automobile body in an embodiment.
Description of the drawings:
100. an energy storage cabin; 200. a power cabin; 300. a carrying cabin; 400. a front suspension assembly; 500. a rear suspension assembly; 600. a front axle assembly; 700; a rear axle assembly; 800. a wheel;
110. a connection structure;
210. a first stringer; 220. a first cross beam; 230. a first connecting beam;
310. a second stringer; 320. a second cross beam; 330. a second connection beam;
410. front suspension connecting lugs; 510. rear suspension connecting lugs.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1, fig. 1 shows a schematic view of a vehicle frame in an embodiment of the present utility model, and an embodiment of the present utility model provides a vehicle frame including an energy storage compartment 100 and a power compartment 200, where the energy storage compartment 100 includes at least one mounting cross member and a mounting longitudinal member, and the mounting cross member and the mounting longitudinal member are capable of mounting a battery pack. In one embodiment, the mounting cross beam is provided with at least two first mounting holes, and the mounting longitudinal beam is provided with at least two second mounting holes for connection with a battery pack. Optionally, 2, 4, 6 or 8 first installation hole sites are uniformly distributed on the installation beam, a plurality of second installation hole sites are uniformly distributed on the installation longitudinal beam, the number of the second installation hole sites is the same as that of the first installation hole sites, and battery packs with different capacities and volumes can be connected and installed through different installation hole sites on the installation beam and the installation longitudinal beam, so that different endurance mileage requirements are realized, and the adaptability of the energy storage cabin 100 is improved.
The power cabin 200 is connected with the energy storage cabin 100, and two first stringers 210 of the power cabin 200 are provided with connecting hole sites, and each two opposite connecting hole sites form a pair, and can be used for installing a power assembly of an automobile. When power assemblies of different vehicle types are required to be installed, connecting hole positions which can be matched with the power cabin 200 are determined according to the connecting positions on the power assemblies and are connected and fixed, so that the compatibility of the power assemblies of different vehicle types is realized, and the installation requirements of pure electric, range-extending and fuel cell type power assemblies are met. The frame has strong adaptability, saves development of different power assembly vehicle types on the frame, and reduces development cost and period.
To facilitate installation of the power pod 200 with different types of power assemblies, alternatively, in one embodiment, the first stringers 210 may be threaded with the power assemblies, and the number of connection holes on each first stringer 210 may be 2, 4, 6, 8, 10, 12, or 14, so as to provide sufficient connection holes for installing different types of power assemblies.
For ease of installation, in one embodiment, one end of each of the first stringers 210 is screwed to the tank 100, and the other end of each of the first stringers 210 is screwed to the first cross member 220. One end of each of the two second longitudinal beams 310 is in threaded connection with the energy storage cabin 100, and the other end of each of the two second longitudinal beams 310 is in threaded connection with the second cross beam 320.
To facilitate replacement of the first longitudinal beam 210, in one embodiment, the frame further includes a connection structure 110, and two ends of the connection structure 110 are detachably connected to the first longitudinal beams 210 of the energy storage compartment 100 and the power compartment 200, respectively.
In order to improve the connection stability between the first longitudinal beam 210 and the energy storage cabin 100, in one embodiment, the connection structure 110 is made of i-shaped structural steel, one end of the connection structure 110 is provided with a mounting surface, the mounting surface is connected with the energy storage cabin 100, and the other end of the connection structure 110 is connected with the first longitudinal beam 210 of the power cabin 200. The connection is more stable by increasing the bearing area of the connection of the energy storage compartment 100 through the mounting surface of the connection structure 110.
Referring to fig. 1 and 2, in one embodiment, the frame further includes a load-bearing cabin 300, where the load-bearing cabin 300 includes a second longitudinal beam 310 and a second transverse beam 320, one end of each of the second longitudinal beams 310 is connected to the energy storage cabin 100, and the other ends of the second longitudinal beams 310 are connected to the second transverse beam 320. The front suspension of the automobile is connected with the first longitudinal beam 210 of the power cabin 200 in a hanging mode, the rear suspension of the automobile is connected with the bearing cabin 300 in a hanging mode, and the front and rear wheelbase of the automobile can be changed by adjusting the length adjustment of the first longitudinal beam 210 of the power cabin 200 and the second longitudinal beam 310 of the bearing cabin 300, so that the automobile is suitable for automobiles such as cars and commercial vehicles, and the wheelbase design requirement of the automobiles is met.
In order to improve structural stability of the vehicle frame, in one embodiment, the power cabin 200 further includes a first connection beam 230, the first connection beam 230 is disposed between the two first stringers 210, two ends of the first connection beam 230 are respectively connected to the two first stringers 210, the first connection beam 230 performs a connection supporting function on the two first stringers 210 of the power cabin 200, supports a middle portion of the first stringers 210, and improves structural stability; similarly, the load-bearing cabin 300 further includes a second connection beam 330, the second connection beam 330 is disposed between the two second stringers 310, two ends of the second connection beam 330 are respectively connected with the two second stringers 310, and the function of the second connection beam 330 is similar to that of the first connection beam 230, which is not repeated herein.
In one embodiment, the first connecting beam 230 and the second connecting beam 330 are made of i-shaped structural steel, and the two ends of the first connecting beam 230 and the second connecting beam 330 are respectively provided with a limiting plate, and the limiting plates are abutted to and fixedly connected with the first longitudinal beam 210 or the second longitudinal beam 310. The contact areas of the first connecting beam 230 and the second connecting beam 330 with the first longitudinal beam 210 and the second longitudinal beam 310 are increased through the limiting plates, and meanwhile, the limiting plates play a role in limiting during installation, so that the first connecting beam 230 and the first longitudinal beam 210 are conveniently positioned and connected and fixed, and the second connecting beam 330 and the second longitudinal beam 310 are conveniently positioned and connected and fixed.
The first connecting beam 230 and the second connecting beam 330 may be provided with a plurality of lengths, and the first connecting beam and the second connecting beam with different lengths are respectively connected with the power cabin and the bearing cabin, so that the adjustment of the widths of the power cabin and the bearing cabin is realized, and the track of the automobile can be changed.
In order to improve the structural stability of the first longitudinal beam 210, in one embodiment, the first longitudinal beam 210 includes a main body and a first bending portion disposed opposite to the main body, the first bending portion is longitudinally disposed on the main body, and the limiting plate of the first connecting beam 230 abuts against and is fixedly connected with the first bending portion; the second longitudinal beam 310 is provided with a second bending portion which is oppositely arranged, and the limiting plate of the second connecting beam 330 is abutted to and fixedly connected with the second bending portion. The first bending part can be integrally formed with the body, so that the first bending part is conveniently connected and fixed with the limiting plate of the first connecting beam 230, and meanwhile, the bending resistance of the first longitudinal beam 210 can be enhanced. Similarly, the second bending portion is arranged to facilitate connection and fixation of the second longitudinal beam 310 and the second connecting beam 330, and to improve bending resistance of the second longitudinal beam 310.
As shown in fig. 2, the present utility model also provides an automobile including the frame as described above, and a front suspension assembly 400, a rear suspension assembly 500, a front axle assembly 600, a rear axle assembly 700, and wheels 800. The front suspension assembly 400 is provided with a front suspension link 410, and the front suspension link 410 is connected with the first longitudinal beam 210; the rear suspension assembly 500 is provided with a rear suspension link 510, and the rear suspension link 510 is connected with the second longitudinal beam 310; the front axle assembly 600 is connected to the front suspension assembly 400; the rear axle assembly 700 is connected to the rear suspension assembly 500; the wheel 800 includes a front tire and a rear tire, the front axle assembly 600 includes a front hub connected with the front tire, and the rear axle assembly 700 includes a rear hub connected with the rear tire. The automobile has the characteristics of strong adaptability of the automobile frame and compatibility with power assembly carrying of different automobile types, and reduces the development cost and period of the automobile frame.
Above-mentioned frame, the battery package can be installed to the installation crossbeam and the installation longeron of energy storage cabin 100, power cabin 200 with energy storage cabin 100 is connected, and two first longerons 210 of power cabin 200 all are equipped with the connection hole site, and every two relative connection hole sites constitute a pair of, can be used to install the power assembly of car. When power assemblies of different vehicle types are required to be installed, connection hole sites which can be matched with the power cabin 200 are determined according to connection positions on the power assemblies and are connected and fixed, compatibility of the power assemblies of different vehicle types is achieved, the vehicle frame is high in adaptability and good in compatibility, development of the vehicle frames of the different power assembly vehicle types is saved, and development cost and development period are reduced.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A frame, the frame comprising:
the energy storage cabin comprises at least one mounting cross beam and a mounting longitudinal beam and is used for being connected with the battery pack;
the power cabin comprises a first longitudinal beam and a first cross beam, wherein one end of the first longitudinal beam is connected with the energy storage cabin, the other end of the first longitudinal beam is connected with the first cross beam, and the first longitudinal beam is provided with at least two connecting hole sites for installing a power assembly.
2. The frame of claim 1, further comprising a connecting structure, wherein two ends of the connecting structure are connected to the first stringers of the energy storage compartment and the power compartment, respectively.
3. The frame of claim 2, wherein the connection structure is an i-shaped structural steel, one end of the connection structure is provided with a mounting surface, the mounting surface is connected with the energy storage cabin, and the other end of the connection structure is connected with the first longitudinal beam of the power cabin.
4. The frame of claim 1, further comprising a load compartment comprising a second longitudinal beam and a second transverse beam, wherein one end of each of the two second longitudinal beams is connected to the energy storage compartment and the other end of each of the two second longitudinal beams is connected to the second transverse beam.
5. The frame of claim 4, wherein the power pod further comprises a first connecting beam disposed between the two first longitudinal beams, and both ends of the first connecting beam are respectively connected to the two first longitudinal beams; and/or the number of the groups of groups,
the bearing cabin further comprises a second connecting beam, the second connecting beam is arranged between the two second longitudinal beams, and two ends of the second connecting beam are respectively connected with the two second longitudinal beams.
6. The frame according to claim 5, wherein the first connecting beam and/or the second connecting beam are/is made of i-shaped structural steel, and both ends of the first connecting beam and/or the second connecting beam are/is provided with a limiting plate, and the limiting plate is abutted to and fixedly connected with the first longitudinal beam or the second longitudinal beam.
7. The frame of claim 6, wherein the first longitudinal beam comprises a main body and a first bending part arranged opposite to the main body, the first bending part is longitudinally arranged on the main body, and the limiting plate of the first connecting beam is abutted against and fixedly connected with the first bending part; and/or the second longitudinal beam is provided with a second bending part which is oppositely arranged, and the limiting plate of the second connecting beam is abutted with the second bending part and fixedly connected with the second bending part.
8. The frame of claim 4, wherein one end of each of the two first longitudinal beams is in threaded connection with the energy storage compartment, and the other end of each of the two first longitudinal beams is in threaded connection with the first cross beam; and/or the number of the groups of groups,
one end of each second longitudinal beam is in threaded connection with the energy storage cabin, and the other end of each second longitudinal beam is in threaded connection with the second cross beam.
9. The frame of claim 1, wherein the mounting cross member is provided with at least two first mounting apertures and the mounting rail is provided with at least two second mounting apertures for connection to a battery pack.
10. An automobile comprising a frame as claimed in any one of claims 4 to 8, and
the front suspension assembly is provided with a front suspension connecting lug which is connected with the first longitudinal beam;
the rear suspension assembly is provided with a rear suspension connecting lug which is connected with the second longitudinal beam;
the front axle assembly is connected with the front suspension assembly;
a rear axle assembly connected with the rear suspension assembly;
the wheel comprises a front tire and a rear tire, wherein the front axle assembly comprises a front hub, the front hub is connected with the front tire, the rear axle assembly comprises a rear hub, and the rear hub is connected with the rear tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320174042.1U CN219312860U (en) | 2023-02-10 | 2023-02-10 | Frame and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320174042.1U CN219312860U (en) | 2023-02-10 | 2023-02-10 | Frame and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219312860U true CN219312860U (en) | 2023-07-07 |
Family
ID=87023975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320174042.1U Active CN219312860U (en) | 2023-02-10 | 2023-02-10 | Frame and car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219312860U (en) |
-
2023
- 2023-02-10 CN CN202320174042.1U patent/CN219312860U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10899387B2 (en) | Vehicle frame arrangement | |
| US9180777B2 (en) | Rear integration of a suspension system and fuel tanks in fuel cell vehicles | |
| US10919575B1 (en) | Vehicle chassis platform | |
| CN215475353U (en) | Frame cross beam and car | |
| CN219312860U (en) | Frame and car | |
| CN211167094U (en) | Chassis frame of pure electric commercial vehicle | |
| US11840136B2 (en) | Structural assembly and vehicle having structural assembly | |
| US20230044178A1 (en) | Battery pack support assembly for electric vehicle | |
| CN217124932U (en) | Frame of commodity circulation car | |
| CN220009893U (en) | Frame and vehicle | |
| CN215436183U (en) | Invisible water tank structure | |
| CN215205064U (en) | New forms of energy car lightweight frame assembly | |
| CN216102381U (en) | Front axle section frame of electric motor coach | |
| CN216969805U (en) | Frame and vehicle | |
| CN215321964U (en) | Middle-mounted power battery system arrangement structure based on light commercial vehicle | |
| CN219727868U (en) | High-power hydrogen fuel cell heavy truck hydrogen storage chassis structure | |
| US20240123808A1 (en) | Structural assembly and vehicle having structural assembly | |
| CN216733809U (en) | Rear suspension and bearing chassis thereof | |
| US20240140530A1 (en) | Structural assembly for vehicle | |
| CN218777592U (en) | Frame assembly of electric truck and heavy truck | |
| CN220430288U (en) | Vehicle body structure and vehicle | |
| US20240034138A1 (en) | Structural assembly and vehicle having structural assembly | |
| CN214396309U (en) | Leaf spring support installing support, frame and bear formula passenger train entirely | |
| CN219029108U (en) | Battery replacement device and vehicle | |
| CN219989379U (en) | Multi-wheel drive trailer system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |