CN211472670U - Telescopic beam structure and excavator - Google Patents
Telescopic beam structure and excavator Download PDFInfo
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- CN211472670U CN211472670U CN201922387257.8U CN201922387257U CN211472670U CN 211472670 U CN211472670 U CN 211472670U CN 201922387257 U CN201922387257 U CN 201922387257U CN 211472670 U CN211472670 U CN 211472670U
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Abstract
The application relates to the technical field of engineering vehicles, in particular to a telescopic beam structure and an excavator, wherein the telescopic beam structure comprises a first main beam, and the first main beam is provided with a first telescopic assembly; the second main beam is arranged in parallel with the first main beam; the second main beam is provided with a second telescopic component, and the first telescopic component is connected with the second telescopic component and used for enabling the first main beam and the second main beam to be close to or far away from each other; the first telescopic assembly comprises a first telescopic beam and a second telescopic beam, and the first telescopic beam and the second telescopic beam are mutually attached; the second telescopic assembly comprises a third telescopic beam and a fourth telescopic beam, and the third telescopic beam and the fourth telescopic beam are mutually attached. The application provides a thickness of a plurality of flexible arms of flexible beam structure is showing the increase at the bending resistance coefficient under the condition that equals with the thickness of current flexible arm, avoids stress concentration, reduces the probability that flexible roof beam atress was buckled, can effectively reduce the condition that flexible roof beam rocked, the off tracking, improves vehicle operation process's stability.
Description
Technical Field
The application relates to the technical field of engineering vehicles, in particular to a telescopic beam structure and an excavator.
Background
The telescopic beam structure of the excavator is one of important structures of the micro-excavation walking frame, the connection mode and the rigidity of the telescopic beam structure directly influence the stable operation of the excavator, and the improvement of the structural connection mode is one of important methods for improving the stability of a micro-excavation lower frame. At present, the bending resistance coefficient of the slightly-excavated telescopic beam is low, so that the stress concentration of the telescopic beam is easily caused, the stress exceeds the bearing capacity of a steel plate, a lower frame is cracked, and the stability of the lower frame is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flexible girder construction and excavator to solve the flexible roof beam's of excavator bending resistance that exists among the prior art to a certain extent and be more weak, influence the technical problem of the stability of frame down.
The application provides a telescopic beam structure, include:
the first main beam is provided with a first telescopic assembly;
the second main beam is arranged in parallel with the first main beam;
the second main beam is provided with a second telescopic assembly, and the first telescopic assembly is connected with the second telescopic assembly and used for enabling the first main beam and the second main beam to approach or depart from each other;
the first telescopic assembly comprises a first telescopic beam and a second telescopic beam, and the first telescopic beam and the second telescopic beam are mutually attached;
the second telescopic assembly comprises a third telescopic beam and a fourth telescopic beam, and the third telescopic beam is attached to the fourth telescopic beam.
In the above technical solution, further, the length of the second telescopic beam is greater than the length of the first telescopic beam, the length of the third telescopic beam is greater than the length of the fourth telescopic beam, the first telescopic beam can abut against the third telescopic beam, and the second telescopic beam can abut against the fourth telescopic beam.
In any of the above technical solutions, further, the first telescopic beam, the second telescopic beam, the third telescopic beam and the fourth telescopic beam all have a pentagonal prism structure in which two adjacent inner angles are right angles.
In any of the above technical solutions, further, each of the first telescopic beam, the second telescopic beam, the third telescopic beam and the fourth telescopic beam includes three continuous and perpendicular wall surfaces, so that two adjacent inner angles of the pentagonal prism structure are right angles, and the two right angles are distributed in a vertical direction in a state where the telescopic beam structure is mounted on the vehicle chassis.
In any one of the above technical solutions, further, the vehicle body further includes a connecting sleeve, and one end of the first telescopic assembly, which is far away from the first main beam, is disposed in one end of the connecting sleeve;
one end, far away from the second main beam, of the second telescopic assembly is arranged in the other end of the connecting sleeve.
In any of the above technical solutions, the vehicle seat further includes a connecting sleeve, and inclined planes of the first telescopic beam, the second telescopic beam, the third telescopic beam and the fourth telescopic beam, except three wall surfaces forming a right angle, are all attached to an inner wall of the connecting sleeve.
In any one of the above technical solutions, further, three wall surfaces of each of the first telescopic beam, the second telescopic beam, the third telescopic beam and the fourth telescopic beam, which are used for forming a right angle, are a first wall surface, a second wall surface and a third wall surface respectively, the second wall surface is perpendicular to the first wall surface and the second wall surface, a gap is formed between the first wall surface and the inner wall of the connecting sleeve, and the third wall surface is attached to the inner wall of the connecting sleeve; the second wall surface of the first telescopic beam is attached to the second wall surface of the second telescopic beam, and the second wall surface of the third telescopic beam is attached to the second wall surface of the fourth telescopic beam.
In any one of the above technical solutions, further, the number of the first telescopic assemblies, the number of the second telescopic assemblies and the number of the connecting sleeves are the same and are at least two.
The application also provides an excavator, including any one of the above technical scheme the telescopic girder structure, therefore, have all beneficial technical effects of this telescopic girder structure, here, no longer give unnecessary details.
The application also provides another excavator, which comprises the telescopic beam structure and the chassis central body in any technical scheme, wherein the side wall of the connecting sleeve is connected with the chassis central body.
Compared with the prior art, the beneficial effect of this application is:
the application provides a telescopic beam structure includes: the first main beam, the second main beam, the first telescopic assembly and the third telescopic assembly; the first main beam and the second main beam are arranged in parallel and have symmetrical structures; the first telescopic assembly is arranged on the first main beam, the second telescopic assembly is arranged on the second main beam, and the first telescopic assembly and the second telescopic assembly are telescopically connected with each other, so that the first telescopic assembly and the second telescopic assembly can be close to each other until the first telescopic assembly and the second telescopic assembly are abutted, or the first telescopic assembly and the second telescopic assembly can be far away from each other to change the distance between the first main beam and the second main beam; the second telescopic assembly comprises a third telescopic beam and a fourth telescopic beam, the third telescopic beam and the fourth telescopic beam are mutually attached, and the strength and the bending resistance of the first telescopic assembly and the second telescopic assembly are obviously enhanced.
The application provides a flexible roof beam structure's first flexible subassembly and second flexible subassembly both can be close to each other or keep away from to the distance between adjustment first girder and the second girder, and first flexible subassembly and the flexible subassembly of second have stronger intensity and bending resistance.
The application provides an excavator, including the aforesaid flexible girder construction for the excavator chassis, therefore, through this flexible girder construction, two track roof beams that can make the chassis of excavator have scalability, and the flexible girder construction that this application provided has very strong bending resistance, is difficult for impairedly, the fracture, ensures the stability that the excavator was got off.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a telescopic beam structure provided in an embodiment of the present application;
fig. 2 is a partial structural schematic view of a telescopic beam structure provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a telescopic beam structure provided in an embodiment of the present application;
fig. 4 is a cross-sectional view of a first telescoping assembly of a telescoping beam structure provided in an embodiment of the present application.
Reference numerals:
1-a first main beam, 11-a first telescopic assembly, 101-a first telescopic beam, 102-a second telescopic beam, 2-a second main beam, 21-a second telescopic assembly, 201-a third telescopic beam, 202-a fourth telescopic beam, 3-a connecting sleeve and 4-a chassis central body.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The following describes a telescopic girder structure and an excavator according to some embodiments of the present application with reference to fig. 1 to 4.
Example one
Referring to fig. 1 and 3, an embodiment of the present application provides a telescopic beam structure including: the first main beam 1, the first main beam 1 is provided with a first telescopic assembly 11; the second main beam 2 is arranged in parallel with the first main beam 1; the second main beam 2 is provided with a second telescopic assembly 21, and the first telescopic assembly 11 is connected with the second telescopic assembly 21.
Further, the first telescopic assembly 11 includes a first telescopic beam 101 and a second telescopic beam 102, and the first telescopic beam 101 and the second telescopic beam 102 are attached to each other.
Further, the second telescopic assembly 21 includes a third telescopic beam 201 and a fourth telescopic beam 202, and the third telescopic beam 201 and the fourth telescopic beam 202 are attached to each other.
In this embodiment, taking as an example that the telescopic beam structure provided in the present application is specifically applied to an excavator chassis, the telescopic beam structure includes: the main beam structure comprises a first main beam 1, a second main beam 2, a first telescopic assembly 11 and a third telescopic assembly; the excavator comprises a first main beam 1, a second main beam 2, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein the first main beam 1 and the second main beam 2 are two walking crawler beams of the excavator, the first main beam 1 and the second main beam 2 are arranged in parallel, and the first main beam 1 and the second main beam; the first telescopic beam 101 and the second telescopic beam 102 of the first telescopic assembly 11 are arranged on the first main beam 1, and the first telescopic beam 101 and the second telescopic beam 102 are both perpendicular to the first main beam 1; the third telescopic beam 201 and the fourth telescopic beam 202 are arranged on the second main beam 2, the third telescopic beam 201 and the fourth telescopic beam 202 are perpendicular to the second main beam 2, the first telescopic assembly 11 and the second telescopic assembly 21 are telescopically connected with each other, the first telescopic beam 101 and the second telescopic beam 102 (the first telescopic assembly 11) can be close to or far away from the third telescopic beam 201 and the fourth telescopic beam 202 (the second telescopic assembly 21), the two crawler beams of the excavator are close to or far away from each other, the chassis is telescopic, namely, the chassis of the excavator is telescopic in the width direction of the excavator. It should be noted that, the first telescopic beam 101 and the second telescopic beam 102 are attached to each other, and the first telescopic beam and the second telescopic beam can be welded intermittently or fully, so as to enhance the connection strength between the first telescopic beam and the second telescopic beam, improve the bending resistance of the first telescopic assembly 11, bear a large force, and are not easy to bend or break, thereby ensuring the stability of the excavator during getting off.
The application provides a first flexible subassembly 11 and the flexible subassembly 21 of second of flexible beam structure both can be close to each other or keep away from to adjust distance between first girder 1 and the second girder 2, and first flexible subassembly 11 and the flexible subassembly 21 of second have stronger intensity and bending resistance.
In one embodiment of the present application, as shown in fig. 3, preferably, the length of the second telescopic beam 102 is greater than the length of the first telescopic beam 101, the length of the third telescopic beam 201 is greater than the length of the fourth telescopic beam 202, and the first telescopic beam 101 can abut against the third telescopic beam 201, and the second telescopic beam 102 can abut against the fourth telescopic beam 202.
In this embodiment, when the distance between the first main beam 1 and the second main beam 2 reaches the minimum value, the first telescopic beam 101 abuts against the third telescopic beam 201, and the second telescopic beam 102 abuts against the fourth telescopic beam 202, so that the stress points of the first telescopic beam 101 and the second telescopic beam 102 (the third telescopic beam 201 and the fourth telescopic beam 202) when being extruded are different due to different lengths, thereby enhancing the force dispersion effect, further avoiding force concentration, enhancing the bearing capacity of the first telescopic assembly 11 and the second telescopic assembly 21, and enlarging the telescopic range between the first main beam 1 and the second main beam 2.
In one embodiment of the present application, preferably, as shown in fig. 2 and 4, each of the first telescopic beam 101, the second telescopic beam 102, the third telescopic beam 201, and the fourth telescopic beam 202 has a pentagonal prism structure in which two adjacent inner angles are right angles.
Further, the first telescopic beam 101, the second telescopic beam 102, the third telescopic beam 201, and the fourth telescopic beam 202 each include three wall surfaces that are continuously perpendicular, so that two adjacent inner angles of the pentagonal prism structure are right angles, and the two right angles are distributed in the vertical direction in a state where the telescopic beam structure is mounted on the vehicle chassis.
Further, the telescopic device also comprises a connecting sleeve 3, and one end of the first telescopic component 11, which is far away from the first main beam 1, is arranged in one end of the connecting sleeve 3;
one end of the second telescopic assembly 21, which is far away from the second main beam 2, is arranged in the other end of the connecting sleeve 3.
Further, the inclined surfaces of the first telescopic beam 101, the second telescopic beam 102, the third telescopic beam 201, and the fourth telescopic beam 202, except for three wall surfaces forming a right angle, are all attached to the inner wall of the connecting sleeve 3.
Further, three wall surfaces of each of the first telescopic beam 101, the second telescopic beam 102, the third telescopic beam 201 and the fourth telescopic beam 202, which are used for forming a right angle, are a first wall surface, a second wall surface and a third wall surface respectively, the second wall surface is perpendicular to the first wall surface and the third wall surface, a gap is formed between the first wall surface and the inner wall of the connecting sleeve 3, and the third wall surface is attached to the inner wall of the connecting sleeve 3; and the second wall surface of the first telescopic beam 101 and the second wall surface of the second telescopic beam 102 are attached to each other, and the second wall surface of the third telescopic beam 201 and the second wall surface of the fourth telescopic beam 202 are attached to each other.
In this embodiment, the cross section of any one of the telescopic beams is a pentagon having two right angles, that is, any one of the telescopic beams has a pentagonal prism structure in which two adjacent inner angles are right angles, such that the pentagonal prism has a first wall surface, a third wall surface, and a second wall surface which is located between the first wall surface and the third wall surface and is perpendicular to the first wall surface and the third wall surface, and two inclined surfaces which are formed with a sharp angle in front and are distributed toward the horizontal direction instead of the vertical direction, wherein the second wall surface of the first telescopic beam 101 and the second wall surface of the second telescopic beam 102 are attached to each other such that the cross section of the first telescopic assembly 11 as a whole is a hexagon, and the upper surface and the lower surface of the first telescopic assembly 11 are flat surfaces, such that when the first telescopic assembly 11 and the second telescopic assembly 21 are abutted against and pressed against each other, the force that first flexible subassembly 11 received is shared by first flexible roof beam 101 and the flexible roof beam 102 of second, can show the ability that improves and bear the weight of the atress to the closed angle of first flexible roof beam 101 and the flexible roof beam 102 of second distributes along the horizontal direction, can effectively reduce the stress concentration of flexible roof beam lower part (lower surface), and then avoids flexible roof beam atress to buckle. Similarly, the third telescopic beam 201 and the fourth telescopic beam 202 are arranged in the same manner as the first telescopic beam 101 and the second telescopic beam 102, and have the same effect.
In this embodiment, the shape of the cross section of connecting sleeve 3 is the hexagon, after first flexible roof beam 101 and the flexible roof beam 102 of second laminating and connect each other, make the cross section of first flexible subassembly 11 also be the hexagon, and two hypotenuses of the flexible roof beam 101 of first flexible roof beam 101 and the flexible roof beam 102 of second two hypotenuses and the inner wall of connecting sleeve 3 laminate mutually, can avoid flexible in-process, first flexible roof beam 101, take place to shake between the flexible roof beam 102 of second, and then arouse whole excavator chassis and even whole car and take place to rock, and simultaneously, leave the gap between the upper surface of first flexible roof beam 101 and the flexible roof beam 102 of second and the inner wall face of connecting sleeve 3, it is too inseparable to avoid cooperating between first flexible roof beam 101 and the flexible roof beam 102 of second, lead to being difficult to assemble or influence the flexible roof beam 101 of first flexible roof beam 102 of second and flexible connecting sleeve. Similarly, the connection mode between the second telescopic assembly 21 and the connection sleeve 3 is the same, and is not described in detail.
In one embodiment of the present application, preferably, as shown in fig. 1 to 3, the number of the first telescopic assembly 11, the second telescopic assembly 21 and the connecting sleeve 3 is the same and each is at least two.
In this embodiment, the number of the first telescopic assemblies 11, the second telescopic assemblies 21 and the connecting sleeves 3 is the same and corresponds to one another, wherein one first telescopic assembly 11 and one second telescopic assembly 21 are connected through one connecting sleeve 3; when the quantity of the first telescopic assemblies 11, the quantity of the second telescopic assemblies 21 and the quantity of the connecting sleeves 3 are respectively two, the two first telescopic assemblies 11 are arranged on the first main beam 1 at parallel intervals, the two second telescopic assemblies 21 are arranged on the second main beam 2 at parallel intervals, when the quantity of the first telescopic assemblies 11, the quantity of the second telescopic assemblies 21 and the quantity of the connecting sleeves 3 are respectively a plurality of, the plurality of first telescopic assemblies 11 are arranged on the first main beam 1 at parallel intervals, the plurality of second telescopic beams 102 are arranged on the second main beam 2 at parallel intervals, one first telescopic assembly 11 and one second telescopic assembly 21 are connected through one connecting sleeve 3, the bearing capacity of the telescopic beam structure is enhanced, and meanwhile, the stability of connection between the first main beam 1 and the second main beam 2 and the stability of the excavator for getting off are enhanced.
To sum up, the inside cavity of the first telescopic assembly 11, the second telescopic assembly 21 of the telescopic beam structure that this application provided, and the bending resistance coefficient of the thickness of a plurality of telescopic booms is showing the increase under the condition that equals with the thickness of current telescopic boom, avoids stress concentration, reduces the probability that telescopic beam atress was buckled to this telescopic beam structure can effectively reduce the condition that telescopic beam rocked, the off tracking at flexible in-process, improves vehicle operation process's stability.
Example two
The embodiment of the application further provides an excavator, which comprises the telescopic beam structure in any one of the embodiments, so that all beneficial technical effects of the telescopic beam structure are achieved, and the details are not repeated herein.
In one embodiment of the present application, preferably, as shown in fig. 1, the excavator further includes a floor center body 4, and the side wall of the connection sleeve 3 is connected with the floor center body 4.
In this embodiment, the connecting sleeve 3 is disposed on the central body 4 and is fixedly connected to the central body 4, when two track beams of the excavator are far away from each other, the first telescopic assembly 11 and the second telescopic assembly 21 extend out relative to the connecting sleeve 3 and are far away from each other, and when two track beams of the excavator are close to each other, the first telescopic assembly 11 and the second telescopic assembly 21 retract relative to the connecting sleeve 3 and are close to each other.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A telescoping beam structure for a vehicle chassis, comprising:
the first main beam is provided with a first telescopic assembly;
the second main beam is arranged in parallel with the first main beam;
the second main beam is provided with a second telescopic assembly, and the first telescopic assembly is connected with the second telescopic assembly and used for enabling the first main beam and the second main beam to approach or depart from each other;
the first telescopic assembly comprises a first telescopic beam and a second telescopic beam, and the first telescopic beam and the second telescopic beam are mutually attached;
the second telescopic assembly comprises a third telescopic beam and a fourth telescopic beam, and the third telescopic beam is attached to the fourth telescopic beam.
2. The telescopic beam structure according to claim 1, wherein the second telescopic beam has a length greater than that of the first telescopic beam, the third telescopic beam has a length greater than that of the fourth telescopic beam, and the first telescopic beam can abut against the third telescopic beam and the second telescopic beam can abut against the fourth telescopic beam.
3. The telescopic beam structure according to claim 1, wherein the first telescopic beam, the second telescopic beam, the third telescopic beam and the fourth telescopic beam each have a pentagonal prism structure in which two adjacent inner angles are right angles.
4. The telescopic beam structure according to claim 3, wherein the first telescopic beam, the second telescopic beam, the third telescopic beam, and the fourth telescopic beam each include three wall surfaces that are continuously perpendicular, so that two adjacent inner angles of the pentagonal prism structure are right angles, and the two right angles are distributed in a vertical direction in a state in which the telescopic beam structure is mounted to the vehicle chassis.
5. The telescoping beam structure of claim 4, further comprising a connector sleeve, an end of the first telescoping assembly distal from the first main beam being disposed within an end of the connector sleeve;
one end, far away from the second main beam, of the second telescopic assembly is arranged in the other end of the connecting sleeve.
6. The telescopic beam structure according to claim 5, wherein the inclined surfaces of the first, second, third and fourth telescopic beams, except for three wall surfaces forming a right angle, are all attached to the inner wall of the connection sleeve.
7. The telescopic beam structure according to claim 6, wherein the three walls of each of the first, second, third and fourth telescopic beams for forming a right angle are a first wall, a second wall and a third wall, respectively, the second wall is perpendicular to the first wall and the second wall, a gap is formed between the first wall and the inner wall of the connecting sleeve, and the third wall is attached to the inner wall of the connecting sleeve; the second wall surface of the first telescopic beam is attached to the second wall surface of the second telescopic beam, and the second wall surface of the third telescopic beam is attached to the second wall surface of the fourth telescopic beam.
8. The telescoping beam structure of claim 5, wherein the first telescoping assembly, the second telescoping assembly, and the connecting sleeve are equal in number and are each at least two.
9. An excavator comprising a telescopic beam structure as claimed in any one of claims 1 to 8.
10. Excavator, characterized in that it comprises a telescopic beam structure according to claim 5, and a chassis central body to which the side walls of the connection sleeves of the telescopic beam structure are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922387257.8U CN211472670U (en) | 2019-12-26 | 2019-12-26 | Telescopic beam structure and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922387257.8U CN211472670U (en) | 2019-12-26 | 2019-12-26 | Telescopic beam structure and excavator |
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| CN211472670U true CN211472670U (en) | 2020-09-11 |
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| CN201922387257.8U Active CN211472670U (en) | 2019-12-26 | 2019-12-26 | Telescopic beam structure and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735082A (en) * | 2022-04-01 | 2022-07-12 | 岚图汽车科技有限公司 | Telescopic beam, telescopic chassis and vehicle |
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2019
- 2019-12-26 CN CN201922387257.8U patent/CN211472670U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735082A (en) * | 2022-04-01 | 2022-07-12 | 岚图汽车科技有限公司 | Telescopic beam, telescopic chassis and vehicle |
| WO2023184967A1 (en) * | 2022-04-01 | 2023-10-05 | 岚图汽车科技有限公司 | Telescopic beam, telescopic chassis, and vehicle |
| CN114735082B (en) * | 2022-04-01 | 2024-04-09 | 岚图汽车科技有限公司 | Telescopic beam, telescopic chassis and vehicle |
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