Supporting structure and carrier

Abstract

The utility model relates to the technical field of carts, and discloses a supporting structure and a carrier. The supporting structure comprises a supporting rod, a front support, a bottom support, a side rod and a linkage piece, the bottom support comprises a front bottom rod and a rear bottom rod which are in sliding connection, the supporting rod is rotationally connected with the front support, the lower end of the front support is rotationally connected with the front bottom rod, and the two ends of the side rod are rotationally connected with the lower end of the supporting rod and the front bottom rod respectively. The two ends of the linkage piece are rotationally connected with the rear bottom rod and the upper end of the front support respectively. The front bottom rod, the front support, the supporting rods and the side rods form a plane four-rod mechanism. When the supporting rod rotates forwards relative to the front support to be folded, the front support and the side rods can be driven to be close to the bottom support, and meanwhile the linkage piece drives the rear bottom rod to slide relative to the front bottom rod. The carrier includes a support structure. In the process of folding the supporting structure, the linkage piece drives the rear bottom rod to slide relative to the front bottom rod, so that the size of the folded supporting structure is smaller, the supporting structure can be driven to be folded by rotating the supporting rod, and operation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of trolley technology, and in particular to a support structure and carrier. Background Technology

[0002] There are many types of stroller frames available, varying in the number of links, their connections, and their positions, resulting in different folding principles and methods. However, existing strollers often remain bulky even when folded, making them unsuitable for storage in confined spaces and failing to meet the growing demand for compact, foldable strollers. Furthermore, the folding process of existing strollers is complex and often requires both hands, causing inconvenience and significantly reducing the user experience.

[0003] Therefore, there is an urgent need for a support structure and carrier to solve the above-mentioned technical problems. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a support structure and carrier that can be easily folded and has a small volume after folding.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A support structure has an unfolded state and a folded state, including a strut, a front support, a bottom support, side rods, and a linkage. The bottom support includes a front bottom rod and a rear bottom rod that are slidably connected. The strut is rotatably connected to the front support, and the lower end of the front support is rotatably connected to the front bottom rod. The two ends of the side rod are rotatably connected to the lower end of the strut and the front bottom rod, respectively. The two ends of the linkage are rotatably connected to the rear bottom rod and the upper end of the front support, respectively. The front bottom rod, the front support, the strut, and the side rods form a planar four-bar linkage. When the strut rotates forward relative to the front support to fold, it can drive the front support and the side rods to move closer to the bottom support, while the linkage drives the rear bottom rod to slide relative to the front bottom rod.

[0007] In some possible implementations, the upper end of the front bracket is rotatably connected to the upper end of the linkage via a first axis; the front bracket is rotatably connected to the support rod via a second axis; the lower end of the support rod is rotatably connected to the upper end of the side rod via a third axis; the linkage is rotatably connected to the rear bottom rod via a fourth axis; the lower end of the side rod is rotatably connected to the front bottom rod via a fifth axis; and the lower end of the front bracket is rotatably connected to the front end of the front bottom rod via a sixth axis; the first axis, second axis, third axis, fourth axis, fifth axis, and sixth axis are all arranged parallel to each other.

[0008] In some possible implementations, when the support structure is in the folded state, at least one of the strut, the side rod, and the linkage is folded inside the base bracket; and / or,

[0009] The side rod and the linkage are disposed on both sides of the front bottom rod; and / or,

[0010] The strut is collinear or parallel to the front support.

[0011] In some possible implementations, the fourth axis is located in front of the first axis, and when the strut rotates forward relative to the front support to fold, the linkage drives the rear bottom rod to slide toward the front bottom rod.

[0012] In some possible implementations, one of the front bottom rod and the rear bottom rod is fixed with a sliding sleeve, and the other is slidably inserted into the sliding sleeve.

[0013] In some possible implementations, the linkage is a straight pull rod, a first connecting seat is provided on the rear bottom rod, and the lower end of the straight pull rod is rotatably connected to the first connecting seat via the fourth shaft; and / or,

[0014] A second connecting seat is provided on the front bottom rod, and the lower end of the side rod is rotatably connected to the second connecting seat through the fifth axis.

[0015] In some possible implementations, the front bottom rod includes a sleeve, and the rear bottom rod slides through the sleeve; or,

[0016] The rear bottom rod is sleeved on the outside of the front bottom rod.

[0017] In some possible implementations, the sidewall of the sleeve is provided with a groove extending axially therein, through which the fourth shaft passes and is slidable; and / or,

[0018] The linkage is a U-shaped frame, including two longitudinal connecting rods on both sides and a transverse connecting rod disposed between the two longitudinal connecting rods. The transverse connecting rod is connected to the lower ends of the two longitudinal connecting rods. The upper ends of the two longitudinal connecting rods are respectively rotatably connected to the upper ends of the front brackets on both sides through the first shaft, and the lower ends of the two longitudinal connecting rods are respectively rotatably connected to the rear bottom rods on both sides through the fourth shaft.

[0019] In some possible implementations, the lower end of the support rod is provided with a first adapter, and the upper end of the side rod is rotatably connected to the first adapter via the third shaft; the upper end of the front bracket is provided with a second adapter, and the upper end of the linkage is rotatably connected to the second adapter via the first shaft; the first adapter and the second adapter are rotatably connected via the second shaft.

[0020] A vehicle comprising the support structure described in any of the above embodiments;

[0021] The vehicle is a trolley, with a front wheel assembly connected to the front bottom rod and a rear wheel assembly connected to the rear bottom rod.

[0022] The beneficial effects of this utility model are:

[0023] The support structure provided by this utility model, during folding, flips the support rod forward, and through a planar four-bar linkage, drives the front support and side rods to flip and fold backward. Simultaneously, a linkage mechanism drives the connecting element to flip backward, which in turn causes the rear bottom rod to slide relative to the front bottom rod. This not only reduces the height of the support structure, making the folded structure flatter, but also significantly reduces the length of the support structure along the front-to-back direction when the rear bottom rod slides and retracts towards the front bottom rod, resulting in a smaller volume of the folded support structure, facilitating storage, handling, and transportation. Furthermore, this utility model allows the entire support structure to fold simply by rotating the support rod, making operation simple and convenient, allowing for one-handed operation and improving the user experience. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the support structure provided in Embodiment 1 of this utility model;

[0025] Figure 2 This is a side view of the support structure provided in Embodiment 1 of this utility model in its unfolded state;

[0026] Figure 3 This is a side view of the support structure provided in Embodiment 1 of this utility model in its first folded state;

[0027] Figure 4 This is a side view of the support structure provided in Embodiment 1 of this utility model in its second folded state;

[0028] Figure 5 This is a side view of the support structure provided in Embodiment 1 of this utility model in its final folded state;

[0029] Figure 6 This is a three-dimensional schematic diagram of the support structure provided in Embodiment 2 of this utility model;

[0030] Figure 7 This is a side view of the support structure provided in Embodiment 2 of this utility model in its unfolded state;

[0031] Figure 8 This is a side view of the support structure provided in Embodiment 2 of this utility model in a folded state in the middle;

[0032] Figure 9This is a side view of the support structure provided in Embodiment 2 of this utility model in its final folded state;

[0033] Figure 10 This is a three-dimensional schematic diagram of the trolley provided in Embodiment 3 of this utility model.

[0034] In the picture:

[0035] 11. Support rod; 12. Front bracket; 13. Front bottom rod; 131. Slide groove; 14. Rear bottom rod; 15. Side rod; 16. Linkage component; 21. First shaft; 22. Second shaft; 23. Third shaft; 24. Fourth shaft; 25. Fifth shaft; 26. Sixth shaft; 31. Sliding sleeve; 32. First connecting seat; 33. Second connecting seat; 34. Adapter; 41. First adapter; 42. Second adapter; 51. Front wheel assembly; 52. Rear wheel assembly. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this utility model, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0040] Example 1

[0041] like Figures 1 to 5 As shown, this embodiment provides a support structure that can be used on trolleys, rocking chairs or other vehicles to solve the problem that trolleys, rocking chairs or other vehicles are still large in size after folding and that folding is inconvenient in the prior art.

[0042] The support structure provided in this embodiment has an unfolded state and a folded state. It includes two sets of side supports located on the left and right sides, and a cross brace assembly connecting the two sets of side supports. Each side support includes a support rod 11, a front support 12, a bottom support, a side rod 15, and a linkage 16. The bottom support includes a front bottom rod 13 and a rear bottom rod 14 that are slidably connected. The rear bottom rod 14 can slide along the axial direction of the front bottom rod 13 to achieve retraction or unfolding. The support rod 11 is rotatably connected to the front support 12 and is located above the front support 12. The lower end of the front support 12 is rotatably connected to the front bottom rod 13. The upper end of the side rod 15 is rotatably connected to the lower end of the support rod 11, and the lower end of the side rod 15 is rotatably connected to the front bottom rod 13. The upper end of the linkage 16 is rotatably connected to the upper end of the front support 12, and the lower end of the linkage 16 is rotatably connected to the rear bottom rod 14. In this embodiment, the front base rod 13, the front bracket 12, the support rod 11, and the side rod 15 constitute a planar four-bar linkage. Rotating the support rod 11 can drive the front bracket 12 and the side rod 15 to rotate. When folding this support structure, the support rod 11 is flipped forward relative to the front bracket 12. The support rod 11 drives the front bracket 12 and the side rod 15 to flip backward and fold through the planar four-bar linkage. At the same time, the linkage 16 is driven to rotate through the linkage action, and then the linkage 16 drives the rear base rod 14 to slide relative to the front base rod 13.

[0043] refer to Figure 1 and Figure 2When the support structure is in the unfolded state, both the strut 11 and the front bracket 12 extend from front to back and upwards at an angle. Optionally, the strut 11 and the front bracket 12 extend in the same direction, that is, the strut 11 and the front bracket 12 are collinear or parallel. This arrangement makes the unfolded support structure appear flatter and more aesthetically pleasing, and improves safety by preventing collisions. The side rod 15 and the linkage 16 also extend from front to back and upwards at an angle, and both the side rod 15 and the linkage 16 are located below the strut 11. Optionally, the side rod 15 and the linkage 16 are respectively located on both sides of the front bottom rod 13. This arrangement makes the folding and unfolding process of the support structure smoother, avoids interference between the rods, and helps to reduce the volume of the support structure after folding. (Reference) Figures 3-5 When the support structure is in a folded state, at least one of the strut 11, side rod 15, and linkage 16 is folded inside the base bracket to reduce the size after folding. In this embodiment, preferably, the strut 11 and side rod 15 are folded inside the base bracket, and the linkage 16 is folded outside the base bracket.

[0044] Specifically, the upper end of the front bracket 12 is rotatably connected to the upper end of the linkage 16 via a first shaft 21; the front bracket 12 is rotatably connected to the support rod 11 via a second shaft 22; the lower end of the support rod 11 is rotatably connected to the upper end of the side rod 15 via a third shaft 23; the lower end of the linkage 16 is rotatably connected to the front end of the rear bottom rod 14 via a fourth shaft 24; the lower end of the side rod 15 is rotatably connected to the front bottom rod 13 via a fifth shaft 25; and the lower end of the front bracket 12 is rotatably connected to the front end of the front bottom rod 13 via a sixth shaft 26. The first shaft 21, second shaft 22, third shaft 23, fourth shaft 24, fifth shaft 25, and sixth shaft 26 are all arranged parallel to each other and extend along the left-right direction of the support structure. This arrangement allows the support rod 11, front bracket 12, side rod 15, and linkage 16 to all rotate along the front-back direction of the support structure, facilitating the folding of the entire support structure directly by operating the support rod 11. This makes the folding process smoother, and the folded support structure flatter, reducing its volume after folding.

[0045] In this embodiment, the linkage 16 can drive the rear bottom rod 14 to slide forward relative to the front bottom rod 13, and can also drive the rear bottom rod 14 to slide backward relative to the front bottom rod 13. For example, when the support structure is in the unfolded state, if the fourth shaft 24 is located behind the first shaft 21, then when the support rod 11 rotates forward relative to the front bracket 12 to fold, the linkage 16 can drive the rear bottom rod 14 to slide backward relative to the front bottom rod 13. Preferably, when the support structure in this embodiment is in the unfolded state, the fourth shaft 24 is located in front of the first shaft 21. At this time, when the support rod 11 rotates forward relative to the front bracket 12 to fold, the linkage 16 can drive the rear bottom rod 14 to slide towards the front bottom rod 13 to retract. This arrangement not only reduces the height of the support structure when folding, making the folded support structure flatter, but also greatly reduces the length of the support structure in the front-to-back direction when the rear bottom rod 14 slides towards the front bottom rod 13 to retract, making the volume of the folded support structure smaller, which is convenient for storage, handling, and transportation. Furthermore, in this embodiment, the entire support structure can be folded by rotating the strut 11, which is simple and convenient to operate, allowing users to operate with one hand and improving the user experience.

[0046] Optionally, such as Figure 1 As shown, in this embodiment, the front bottom rod 13 and the rear bottom rod 14 are slidably connected by a sliding sleeve 31. Specifically, the sliding sleeve 31 can be fixed to the front bottom rod 13, and the rear bottom rod 14 slides from back to front through the through hole of the sliding sleeve 31; or the sliding sleeve 31 can be fixed to the rear bottom rod 14, and the front bottom rod 13 slides from front to back through the through hole of the sliding sleeve 31. Both of these methods can achieve relative sliding between the front bottom rod 13 and the rear bottom rod 14, thereby reducing the size of the support structure in the front-to-back direction during folding by the mutual contraction of the front bottom rod 13 and the rear bottom rod 14.

[0047] Furthermore, the front wheel assembly can be connected to the front bottom rod 13, and the rear wheel assembly can be connected to the rear bottom rod 14. When the rear bottom rod 14 slides and retracts to the front bottom rod 13, it can drive the rear wheel assembly closer to the front wheel assembly, thereby effectively reducing the distance between the front wheel assembly and the rear wheel assembly after the support structure is folded, making the entire support structure smaller in size after folding, and convenient for storage and carrying.

[0048] Optionally, in this embodiment, the linkage 16 is a straight tie rod, which has a simple structure, is easy to process, and is convenient to assemble. Further, a first connecting seat 32 is fixed to the front end of the rear bottom rod 14, and a fourth shaft 24 passes through the first connecting seat 32 and the lower end of the straight tie rod in sequence to achieve rotation of the straight tie rod relative to the first connecting seat 32; a second connecting seat 33 is fixed to the front bottom rod 13, and a fifth shaft 25 passes through the second connecting seat 33 and the lower end of the side rod 15 in sequence to achieve rotation of the side rod 15 relative to the second connecting seat 33; simultaneously, the lower end of the front bracket 12 and the front end of the front bottom rod 13 are rotatably connected through an adapter 34. The above configuration improves the rotational reliability of the linkage 16, the side rod 15, and the front bracket 12 relative to the bottom bracket, ensuring the structural strength of the support structure.

[0049] Furthermore, the support structure also includes a locking element for locking the support structure in the deployed state. For example, the locking element can be a latch located on the pivot of the strut 11 and the front bracket 12. Of course, the locking element can also adopt other structures; for specific details, please refer to the relevant content in the prior art, which will not be elaborated upon in this embodiment.

[0050] Example 2

[0051] like Figures 6-9 As shown, this embodiment provides another support structure, which is basically the same as the structure in Embodiment 1. It also includes two sets of side supports located on the left and right sides, and a cross brace assembly connecting the two sets of side supports. Each side support includes a support rod 11, a front support 12, a front bottom rod 13, a rear bottom rod 14, a side rod 15, and a linkage 16. The differences between this embodiment and Embodiment 1 are: the sliding structure between the front bottom rod 13 and the rear bottom rod 14, the specific arrangement of the linkage 16, and the rotation structure between the support rod 11 and the front support 12. Structures identical to those in Embodiment 1 will not be described again in this embodiment.

[0052] In this embodiment, the front bottom rod 13 is a sleeve, and the rear bottom rod 14 slides through the cavity of the sleeve. A groove 131 extending axially through the side wall of the sleeve is provided. The fourth shaft 24 passes sequentially through the front end of the rear bottom rod 14, the groove 131, and the lower end of the linkage 16, thereby achieving a rotatable connection between the linkage 16 and the rear bottom rod 14. Simultaneously, the fourth shaft 24 can slide back and forth along the groove 131, allowing the linkage 16 to drive the rear bottom rod 14 to extend and retract relative to the front bottom rod 13 during rotation. This configuration simplifies the sliding structure between the front bottom rod 13 and the rear bottom rod 14, making processing convenient and ensuring reliable movement. It should be noted that in other embodiments, the rear bottom rod 14 can also be sleeved on the outside of the front bottom rod 13, achieving a similar sliding connection between the rear bottom rod 14 and the front bottom rod 13.

[0053] Furthermore, a front wheel assembly 51 is connected to the front base rod 13, and a rear wheel assembly 52 is connected to the rear base rod 14. When the rear base rod 14 slides and retracts to the front base rod 13, it can drive the rear wheel assembly 52 to move closer to the front wheel assembly 51, thereby effectively reducing the distance between the front wheel assembly 51 and the rear wheel assembly 52 after the support structure is folded, making the entire support structure smaller in size after folding, and convenient for storage and carrying.

[0054] like Figure 6 As shown, the linkage 16 in this embodiment is a U-shaped frame, including two longitudinal connecting rods on both sides and a transverse connecting rod disposed between the two longitudinal connecting rods. The transverse connecting rod is connected to the lower ends of the two longitudinal connecting rods. The upper ends of the two longitudinal connecting rods are respectively rotatably connected to the upper ends of the front brackets 12 on both sides via the first shaft 21, and the lower ends of the two longitudinal connecting rods are respectively rotatably connected to the front ends of the rear bottom rods 14 on both sides via the fourth shaft 24. In this embodiment, the linkage 16 is set as a U-shaped frame, and the transverse connecting rod strengthens the lateral support of the support structure, increasing the structural strength between the two sets of side brackets and ensuring the safety and reliability of the stroller or other carriers during use. Furthermore, when the support structure is in a folded state, at least one of the support rod 11, side rod 15, and linkage 16 is folded inside the bottom bracket to reduce the size after folding. Preferably, in this embodiment, the support rod 11 and linkage 16 are folded inside the bottom bracket, and the side rod 15 is folded outside the bottom bracket.

[0055] In this embodiment, a first adapter 41 is fixed to the lower end of the support rod 11, and a second adapter 42 is fixed to the upper end of the front support 12. The first adapter 41 and the second adapter 42 are rotatably connected via a second shaft 22, thereby achieving reliable rotation between the support rod 11 and the front support 12. Similarly, the support structure in this embodiment also includes a locking member for locking the support structure in the unfolded state. The locking member can be disposed between the first adapter 41 and the second adapter 42 to restrict their relative rotation. Further, the first adapter 41 is provided with a downwardly extending first connecting piece, and the upper end of the side rod 15 is rotatably connected to the first connecting piece via a third shaft 23; the second adapter 42 is provided with a downwardly extending second connecting piece, and the upper end of the linkage 16 is rotatably connected to the second connecting piece via a first shaft 21. In addition, the lower end of the front support 12 and the front end of the front bottom rod 13 are rotatably connected via an adapter 34. The above structure is reasonably designed, convenient to connect, and reliable in movement.

[0056] Example 3

[0057] This embodiment provides a carrier, including the support structure described in Embodiment 1 or Embodiment 2. The carrier can specifically be a stroller, rocking chair, baby carriage, etc. Figure 10As shown, the carrier in this embodiment is a trolley, with a front wheel assembly 51 connected to the front base rod 13 and a rear wheel assembly 52 connected to the rear base rod 14. During the folding process, the trolley uses the linkage 16 to drive the rear base rod 14 to retract towards the front base rod 13, reducing the distance between the front wheel assembly 51 and the rear wheel assembly 52. ​​This results in a smaller folded size, making it easier to store, collect, and transport. Furthermore, the frame can be folded by rotating the support rod 11, making the operation simple and convenient, allowing for one-handed operation and improving the user experience.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A support structure having an unfolded state and a folded state, characterized in that, The device includes a strut, a front support, a bottom support, side rods, and a linkage. The bottom support includes a front bottom rod and a rear bottom rod that are slidably connected. The strut is rotatably connected to the front support, and the lower end of the front support is rotatably connected to the front bottom rod. Both ends of the side rod are rotatably connected to the lower end of the strut and the front bottom rod, respectively. Both ends of the linkage are rotatably connected to the rear bottom rod and the upper end of the front support, respectively. The front bottom rod, the front support, the strut, and the side rods form a planar four-bar linkage. When the strut rotates forward relative to the front support to fold, it can drive the front support and the side rods to move closer to the bottom support, while the linkage drives the rear bottom rod to slide relative to the front bottom rod.

2. The support structure according to claim 1, characterized in that, The upper end of the front bracket is rotatably connected to the upper end of the linkage via a first shaft; the front bracket is rotatably connected to the support rod via a second shaft; the lower end of the support rod is rotatably connected to the upper end of the side rod via a third shaft; the linkage is rotatably connected to the rear bottom rod via a fourth shaft; the lower end of the side rod is rotatably connected to the front bottom rod via a fifth shaft; the lower end of the front bracket is rotatably connected to the front end of the front bottom rod via a sixth shaft; the first shaft, second shaft, third shaft, fourth shaft, fifth shaft, and sixth shaft are all arranged parallel to each other.

3. The support structure according to claim 2, characterized in that, When the support structure is in the folded state, at least one of the strut, the side rod, and the linkage is folded inside the base bracket; and / or, The side rod and the linkage are disposed on both sides of the front bottom rod; and / or, The strut is collinear or parallel to the front support.

4. The support structure according to claim 2, characterized in that, The fourth axis is located in front of the first axis. When the support rod rotates forward relative to the front bracket to fold, the linkage drives the rear bottom rod to slide toward the front bottom rod.

5. The support structure according to claim 2, characterized in that, One of the front bottom rod and the rear bottom rod is fixed with a sliding sleeve, and the other is slidably inserted into the sliding sleeve.

6. The support structure according to claim 5, characterized in that, The linkage component is a straight pull rod, and a first connecting seat is provided on the rear bottom rod. The lower end of the straight pull rod is rotatably connected to the first connecting seat through the fourth shaft; and / or, A second connecting seat is provided on the front bottom rod, and the lower end of the side rod is rotatably connected to the second connecting seat through the fifth axis.

7. The support structure according to claim 2, characterized in that, The front bottom rod includes a sleeve, and the rear bottom rod slides through the sleeve; or... The rear bottom rod is sleeved on the outside of the front bottom rod.

8. The support structure according to claim 7, characterized in that, The sleeve has a groove extending axially along its sidewall, through which the fourth shaft passes and can slide along the groove; and / or, The linkage is a U-shaped frame, including two longitudinal connecting rods on both sides and a transverse connecting rod disposed between the two longitudinal connecting rods. The transverse connecting rod is connected to the lower ends of the two longitudinal connecting rods. The upper ends of the two longitudinal connecting rods are respectively rotatably connected to the upper ends of the front brackets on both sides through the first shaft, and the lower ends of the two longitudinal connecting rods are respectively rotatably connected to the rear bottom rods on both sides through the fourth shaft.

9. The support structure according to claim 7, characterized in that, The lower end of the support rod is provided with a first adapter, and the upper end of the side rod is rotatably connected to the first adapter via the third shaft; the upper end of the front bracket is provided with a second adapter, and the upper end of the linkage is rotatably connected to the second adapter via the first shaft; the first adapter and the second adapter are rotatably connected via the second shaft.

10. A vehicle, characterized in that, Includes the support structure as described in any one of claims 1-9; The vehicle is a trolley, with a front wheel assembly connected to the front bottom rod and a rear wheel assembly connected to the rear bottom rod.

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