Carrier frame and versatile carrier therefor

Abstract

The utility model discloses a kind of carrier frame and its multifunctional carrier, including upper connecting seat, frame assembly, chassis assembly, front linkage, rear linkage, frame locking assembly, by connecting front linkage, front frame, upper connecting seat, vertical rod group and front chassis to form front four connecting rod mechanism and connecting rear linkage, rear frame, upper connecting seat, vertical rod group and rear chassis to form rear four connecting rod mechanism, can effectively limit the relative motion path between each rod, so that the folding and unfolding action of front frame driving front chassis and rear frame driving rear chassis is along preset motion trajectory, the whole process is smooth, stable, avoids the situation of jam or suddenly sagging, realizes accurate, stable and efficient folding and unfolding motion, and structure simplification, manufacturing and assembly are convenient, effectively improve product market competitiveness.

Description

[Technical Field]

[0001] This utility model relates to the field of children's travel products technology, and in particular to a vehicle frame and its multi-functional vehicle. [Background Technology]

[0002] Existing campervans typically employ a fixed structural design, with the overall frame and walking / pull mechanisms often connected by a rigid, non-removable connection. For example, a portable folding campervan with application number 202422291193.2 suffers from a large storage volume, making it inconvenient to transport and carry, and lacking practical flexibility. Furthermore, the support structure of these campervans often uses two common folding methods: one involves folding forward and backward via X-shaped links on the side supports, and the other relies on a base frame linkage mechanism for folding.

[0003] However, these traditional designs have several inherent flaws. First, at the structural level, complex linkage systems—whether multi-link X-type structures or frame-based linkage folding mechanisms—rely on numerous connecting rods, pivots, and locking devices. This not only increases the complexity and weight of the mechanism but also makes it prone to wear and loosening during long-term use, affecting overall reliability and service life. Second, the numerous and precise components significantly increase material and processing costs, resulting in uncompetitive final product prices. Furthermore, in terms of structural efficiency, X-type linkage solutions often still occupy a considerable amount of space after folding, limiting storage efficiency; while frame-based linkage solutions, due to the inherent compromise between folding functionality and load-bearing rigidity, have many connecting points and moving joints, making the chassis prone to deformation or swaying under load, directly affecting overall load support and pushing stability.

[0004] More importantly, when unfolded, the bottom of most of these vehicles is designed to be completely flat. This flat-bottom structure presents significant functional limitations in practical use, especially when carrying young children: the child can only passively sit within the flat bottom of the frame, severely restricting their movement space; furthermore, for safety reasons, to prevent the child from falling out during pushing, they are usually not allowed to stand or move freely inside the vehicle. While this design ensures basic safety, it also severely restricts the child's posture adjustment and freedom of movement during the ride, directly impacting their comfort and experience.

[0005] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a vehicle frame and its multi-functional vehicle. By connecting the front linkage, front frame, upper connecting seat, vertical rod group and front base frame to form a front four-bar linkage mechanism, and connecting the rear linkage, rear frame, upper connecting seat, vertical rod group and rear base frame to form a rear four-bar linkage mechanism, the relative movement paths between each link can be effectively limited. This allows the folding and unfolding actions of the front frame driving the front base frame and the rear frame driving the rear base frame to proceed along a preset movement trajectory. The whole process is smooth and stable, avoiding jamming or sudden loosening. It achieves precise, stable and efficient folding and unfolding movements, and the structure is simplified, making manufacturing and assembly convenient, effectively improving the product's market competitiveness.

[0007] To solve the above-mentioned technical problems, this utility model provides a vehicle frame, comprising:

[0008] Upper connecting seat 1, wherein the upper connecting seat 1 is provided with a vertical rod group 2 extending downward;

[0009] Frame assembly 3, the frame assembly 3 includes a front frame 31 whose end is pivotally connected to the front side of the upper connecting seat 1 and a rear frame 32 whose end is pivotally connected to the rear side of the upper connecting seat 1;

[0010] The base frame assembly 4 includes a front base frame 41 with its end pivotally connected to the lower end of the vertical rod group 2 and a rear base frame 42 with its end pivotally connected to the lower end of the vertical rod group 2.

[0011] The front linkage 5 is directly or indirectly pivotally connected to the front frame 31 at its upper end, and pivotally connected to the front base frame 41 at its lower part. The front linkage 5, the front frame 31, the upper connecting seat 1, the vertical rod group 2 and the front base frame 41 are connected to form a front four-bar linkage mechanism.

[0012] The rear linkage 6 is directly or indirectly pivotally connected to the rear frame 32 at its upper end, and pivotally connected to the rear base frame 42 at its lower part. The rear linkage 6, the rear frame 32, the upper connecting seat 1, the vertical rod group 2 and the rear base frame 42 are connected to form a rear four-bar linkage mechanism.

[0013] A frame locking assembly 7 is provided on the vehicle frame for locking the front four-bar linkage and the rear four-bar linkage.

[0014] As described above, in a vehicle frame, the vertical rod assembly 2 includes a front vertical rod 21 and a rear vertical rod 22. The upper ends of the front vertical rod 21 and the rear vertical rod 22 are fixedly connected to the upper connecting seat 1 and are spaced apart. The end of the front base frame 41 is pivotally connected to the lower end of the front vertical rod 21, and the end of the rear base frame 42 is pivotally connected to the lower end of the rear vertical rod 22. The front linkage 5, the front frame 31, the upper connecting seat 1, the front vertical rod 21, and the front base frame 41 are connected to form a front four-bar linkage mechanism. The rear linkage 6, the rear frame 32, the upper connecting seat 1, the rear vertical rod 22, and the rear base frame 42 are connected to form a rear four-bar linkage mechanism.

[0015] As described above, in a vehicle frame, a connecting reinforcing rod 23 is provided between the front vertical rod 21 and the rear vertical rod 22 and below the upper connecting seat 1. The front end of the connecting reinforcing rod 23 is connected to the front vertical rod 21, and the rear end of the connecting reinforcing rod 23 is connected to the rear vertical rod 22.

[0016] As described above, in a vehicle frame, a sunken space 20 is formed below the vertical rod group 2, and a sunken space opening 202 is formed between the front frame 31 and the rear frame 32 and at the lower end of the vertical rod group 2.

[0017] As described above, a vehicle frame is provided with a flexible fabric cover 201. The bottom of the flexible fabric cover 201 extends downward relative to the opening of the sinking space 202 to form a sinking space 20 that communicates with the opening of the sinking space 202.

[0018] As described above, in a vehicle frame, a downwardly extending front connecting block 311 is fixedly provided on the front frame 31, and the lower end of the front connecting block 311 is pivotally connected to the upper end of the front linkage 5; a downwardly extending rear connecting block 321 is fixedly provided on the rear frame 32, and the lower end of the rear connecting block 321 is pivotally connected to the upper end of the rear linkage 6.

[0019] As described above, in a vehicle frame, the lower part of the front linkage 5 extends downward to form a front extension 51 for engaging with the front transverse bar of the vehicle frame 100 when the vehicle frame is connected to the vehicle frame 100.

[0020] As described above, in a vehicle frame, the frame locking assembly 7 includes a front locking assembly 71 located between the front frame 31 and the upper connecting seat 1 for locking the front frame 31 relative to the upper connecting seat 1, and a front unlocking assembly 72 that is linked to the front locking assembly 71 is provided on the front frame 31; the frame locking assembly 7 also includes a rear locking assembly 73 located between the rear frame 32 and the upper connecting seat 1 for locking the rear frame 32 relative to the upper connecting seat 1, and a rear unlocking assembly 74 that is linked to the rear locking assembly 73 is provided on the rear frame 32.

[0021] As described above, in a vehicle frame, the front locking assembly 71 includes a front locking portion 711 disposed on the upper connecting seat 1 and a front locking member 712 slidably disposed inside the front frame 31 for locking engagement with the front locking portion 711. A front locking elastic member 713 for driving the front locking member 712 to slide back to its original position is provided between the front locking member 712 and the front frame 31. The front unlocking assembly 72 is linked with the front locking member 712. The rear locking assembly 73 includes a rear locking portion 731 disposed on the upper connecting seat 1 and a rear locking member 732 slidably disposed inside the rear frame 32 for locking engagement with the rear locking portion 731. A rear locking elastic member 733 for driving the rear locking member 732 to slide back to its original position is provided between the rear locking member 732 and the rear frame 32. The rear unlocking assembly 74 is linked with the rear locking member 732.

[0022] As described above, in a vehicle frame, the front side of the upper connecting seat 1 is provided with a front guide arc wall 11 for the current frame 31 to abut against the locking end of the front locking member 712 during rotation relative to the upper connecting seat 1, thereby forcing the front locking member 712 to retract into the front frame 31; the rear side of the upper connecting seat 1 is provided with a rear guide arc wall 12 for the rear frame 32 to abut against the locking end of the rear locking member 732 during rotation relative to the upper connecting seat 1, thereby forcing the rear locking member 732 to retract into the rear frame 32.

[0023] As described above, in a vehicle frame, the upper connecting seat 1 has a front opening groove 13 on its front side for the end of the front frame 31 to be inserted and moved, and the upper end wall of the front opening groove 13 is formed with a front blocking part 131 for blocking and limiting cooperation with the front frame 31; the upper connecting seat 1 has a rear opening groove 14 on its rear side for the end of the rear frame 32 to be inserted and moved, and the upper end wall of the rear opening groove 14 is formed with a rear blocking part 141 for blocking and limiting cooperation with the rear frame 32.

[0024] This utility model also provides a multi-functional vehicle, including a retractable frame 100 and a vehicle frame as described above. The frame 100 is provided with a frame connecting seat 110. The upper connecting seat 1 is provided with a frame adapter 10 that is detachably connected to the frame connecting seat 110. Between the frame adapter 10 and the frame connecting seat 110, there is an adapter locking component 200 for locking the frame adapter 10 relative to the frame connecting seat 110, and an adapter unlocking component 300 that is linked to and releases the adapter locking component 200.

[0025] As described above, in a multi-functional vehicle, the adapter locking assembly 200 includes an adapter locking part 210 disposed on the frame adapter 10 and an adapter locking member 220 movably disposed on the frame connecting seat 110 and locked in cooperation with the adapter locking part 210. An adapter locking elastic member for driving the adapter locking member 220 to reset is provided between the adapter locking member 220 and the frame connecting seat 110. The adapter unlocking assembly 300 is linked with the adapter locking member 220.

[0026] As described above, in a multi-functional vehicle, the adapter locking member 220 is an adapter locking hook. The lower ends of the two adapter locking hooks are respectively hinged to the frame connecting seat 110. The upper parts of the two adapter locking hooks are staggered. The upper parts of the two adapter locking hooks are provided with staggered elongated holes 230. A linkage rod 240 passes through the two elongated holes 230. The hook parts of the two adapter locking hooks are used to engage with the corresponding adapter locking parts 210.

[0027] As described above, in a multi-functional vehicle, the adapter unlocking assembly 300 includes an unlocking button 310 that can be slidably disposed on the frame adapter 10 laterally and an unlocking top pusher 320 that can be slidably disposed on the frame adapter 10 vertically. The upper end of the unlocking top pusher 320 is linked to the inner end of the unlocking button 310, and the lower end of the unlocking top pusher 320 abuts against the adapter locking member 220.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. This utility model connects the front linkage, front frame, upper connecting seat, vertical rod group and front base frame to form a front four-bar linkage mechanism, and connects the rear linkage, rear frame, upper connecting seat, vertical rod group and rear base frame to form a rear four-bar linkage mechanism. It can effectively limit the relative movement path between each link, so that the folding and unfolding actions of the front frame driving the front base frame and the rear frame driving the rear base frame are carried out along the preset movement trajectory. The whole process is smooth and stable, avoiding jamming or sudden loosening. It achieves precise, stable and efficient folding and unfolding movement. Moreover, the structure is simplified, manufacturing and assembly are convenient, and the product's market competitiveness is effectively improved.

[0030] 2. To provide passengers with a good riding space and improve riding comfort, a sunken space is formed below the vertical rod group, and a sunken space opening is formed between the front frame and the rear frame at the lower end of the vertical rod group, so as to make it functionally versatile.

[0031] 3. This utility model rigidly connects the front vertical bar and the rear vertical bar by connecting and reinforcing rods, which can effectively enhance the overall structural strength and stability of the vertical bar group, provide a stable installation foundation for the front and rear four-bar linkage, and ensure the stability, reliability and high safety of the vehicle frame.

[0032] 4. In this utility model, the front frame is pivotally connected to the front linkage component via the front connecting block, and the rear frame is pivotally connected to the rear linkage component via the rear connecting block. This allows the front linkage component to be closer to the front frame, the front base frame to be closer to the front vertical rod, the rear linkage component to be closer to the rear frame, and the rear base frame to be closer to the rear vertical rod when folded. This makes the overall structure of the vehicle frame more compact and minimizes its volume when folded, facilitating subsequent handling and storage.

[0033] 5. In order to provide a multiple support structure and improve the stability and reliability of the vehicle frame when connected to the vehicle frame, the lower part of the front linkage extends downward to form a front extension for engaging with the front transverse bar of the vehicle frame when the vehicle frame is connected to the vehicle frame.

[0034] 6. This utility model, through the cooperation of the two side walls of the front opening groove with the front frame blocking and limiting, can effectively prevent the front frame from shifting or misaligning in the radial direction relative to the upper connecting seat, ensuring smooth retraction and extension of the front frame relative to the upper connecting seat; in addition, the cooperation between the front blocking part and the front frame blocking can better limit and prompt the folding action, avoiding damage to parts due to excessive folding stroke.

[0035] 7. The multi-functional vehicle of this utility model adopts the above-mentioned vehicle frame, which makes it usable as a campervan or as a child vehicle, realizing the multi-purpose function of one vehicle. At the same time, it can also achieve precise, stable and efficient folding and unfolding movements. In addition, the overall structure is compact after folding, minimizing the overall volume, which is convenient for subsequent transportation and storage. [Attached Image Description]

[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0037] Figure 1 This is a perspective view of the vehicle frame in this utility model.

[0038] Figure 2 This is a side view of the vehicle frame in this utility model.

[0039] Figure 3 This is one of the side views of the vehicle frame during the folding process in this utility model.

[0040] Figure 4 This is the second side view of the vehicle frame during the folding process in this utility model.

[0041] Figure 5 This is one of the cross-sectional views of the frame locking component in this utility model.

[0042] Figure 6 This is the second cross-sectional view of the frame locking component in this utility model.

[0043] Figure 7This is an exploded view of the vehicle frame in this utility model.

[0044] Figure 8 This is a perspective view of the multifunctional vehicle in this utility model.

[0045] Figure 9 This is a perspective view of the vehicle frame in this utility model.

[0046] Figure 10 This is one of the cross-sectional views of the adapter locking component and the adapter unlocking component in this utility model.

[0047] Figure 11 This is a second cross-sectional view of the adapter locking component and the adapter unlocking component in this utility model.

[0048] Figure 12 This is the third cross-sectional view of the adapter locking component and the adapter unlocking component in this utility model.

[0049] Figure 13 This is the fourth cross-sectional view of the adapter locking component and the adapter unlocking component in this utility model.

[0050] Figure 14 This is a schematic diagram of the present invention when a passenger is riding in it.

Detailed Implementation Methods

[0051] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0052] like Figure 1-14As shown, this utility model discloses a vehicle frame, including an upper connecting seat 1, a frame assembly 3, a base frame assembly 4, a front linkage 5, a rear linkage 6, and a frame locking assembly 7. The upper connecting seat 1 is provided with a downwardly extending vertical rod group 2; the frame assembly 3 includes a front frame 31 with its end pivotally connected to the front side of the upper connecting seat 1 and a rear frame 32 with its end pivotally connected to the rear side of the upper connecting seat 1; the base frame assembly 4 includes a front base frame 41 with its end pivotally connected to the lower end of the vertical rod group 2 and a rear base frame 42 with its end pivotally connected to the lower end of the vertical rod group 2; the upper end of the front linkage 5 is directly or indirectly pivotally connected to the front frame 31, and the lower part of the front linkage 5 is pivotally connected to the front base frame 41. The moving part 5, the front frame 31, the upper connecting seat 1, the vertical rod group 2 and the front base frame 41 are connected to form a front four-bar linkage mechanism; the upper end of the rear linkage 6 is directly or indirectly pivotally connected to the rear frame 32, and the lower part of the rear linkage 6 is pivotally connected to the rear base frame 42. The rear linkage 6, the rear frame 32, the upper connecting seat 1, the vertical rod group 2 and the rear base frame 42 are connected to form a rear four-bar linkage mechanism; the frame locking assembly 7 is provided on the vehicle frame to lock the front four-bar linkage mechanism and the rear four-bar linkage mechanism. This utility model connects the front linkage, front frame, upper connecting seat, vertical rod group and front base frame to form a front four-bar linkage mechanism, and connects the rear linkage, rear frame, upper connecting seat, vertical rod group and rear base frame to form a rear four-bar linkage mechanism. It can effectively limit the relative movement path between each link, so that the folding and unfolding actions of the front frame driving the front base frame and the rear frame driving the rear base frame are carried out along the preset movement trajectory. The whole process is smooth and stable, avoiding jamming or sudden loosening. It achieves precise, stable and efficient folding and unfolding movement, and the structure is simplified, manufacturing and assembly are convenient, effectively improving the product's market competitiveness.

[0053] This utility model can also control the front four-bar linkage and the rear four-bar linkage to be deployed simultaneously according to usage requirements or different usage scenarios, or it can control only the front four-bar linkage or the rear four-bar linkage to be deployed, making it versatile and highly practical.

[0054] like Figure 1-4 As shown, the vertical rod group 2 includes a front vertical rod 21 and a rear vertical rod 22. The upper ends of the front vertical rod 21 and the rear vertical rod 22 are fixedly connected to the upper connecting seat 1 and are spaced apart. The end of the front base frame 41 is pivotally connected to the lower end of the front vertical rod 21, and the end of the rear base frame 42 is pivotally connected to the lower end of the rear vertical rod 22. The front linkage 5, the front frame 31, the upper connecting seat 1, the front vertical rod 21 and the front base frame 41 are connected to form a front four-bar linkage mechanism. The rear linkage 6, the rear frame 32, the upper connecting seat 1, the rear vertical rod 22 and the rear base frame 42 are connected to form a rear four-bar linkage mechanism.

[0055] like Figure 1-4As shown in Figure 14, a sunken space 20 is formed below the vertical rod assembly 2, and a sunken space opening 202 is formed between the front frame 31 and the rear frame 32 at the lower end of the vertical rod assembly 2. This sunken space 20 can accommodate the passenger's feet, solving the problem of inconvenience caused by the planar structure of the current vehicle frame's underframe assembly. Therefore, this embodiment can provide a good riding space for the passenger, improving riding comfort. Figure 14 As shown.

[0056] like Figure 14 As shown, in order to facilitate carrying, the vehicle frame is fitted with a flexible cloth cover 201. The bottom of the flexible cloth cover 201 extends downward relative to the opening of the sinking space 202 to form a sinking space 20 that communicates with the opening of the sinking space 202.

[0057] like Figure 1-4 As shown, a connecting reinforcing rod 23 is provided between the front vertical rod 21 and the rear vertical rod 22, and below the upper connecting seat 1. The front end of the connecting reinforcing rod 23 is connected to the front vertical rod 21, and the rear end of the connecting reinforcing rod 23 is connected to the rear vertical rod 22. By rigidly connecting the front and rear vertical rods through the connecting reinforcing rod, the overall structural strength and stability of the vertical rod assembly can be effectively enhanced, providing a stable installation foundation for the front and rear four-bar linkage mechanism, ensuring the stability, reliability, and high safety of the vehicle frame.

[0058] like Figure 1-4 As shown, a downwardly extending front connecting block 311 is fixedly provided on the front frame 31, and the lower end of the front connecting block 311 is pivotally connected to the upper end of the front linkage 5; a downwardly extending rear connecting block 321 is fixedly provided on the rear frame 32, and the lower end of the rear connecting block 321 is pivotally connected to the upper end of the rear linkage 6. In this embodiment, the front frame is pivotally connected to the front linkage via the front connecting block, and the rear frame is pivotally connected to the rear linkage via the rear connecting block. This allows the front linkage to be closer to the front frame, the front base frame to be closer to the front vertical bar, the rear linkage to be closer to the rear frame, and the rear base frame to be closer to the rear vertical bar when folded. This makes the overall structure of the vehicle frame more compact and minimizes its volume when folded, facilitating subsequent handling and storage.

[0059] In this embodiment, by adding a front connecting block 311 and a rear connecting block 321 to form a clearance space, the front linkage 5 and the rear linkage 6 can be folded and attached more tightly and neatly relative to the front frame 31 and the rear frame 32, respectively, avoiding the problem of incomplete folding due to direct connection.

[0060] like Figure 1-4As shown in Figure 8, in order to provide a multiple support structure and improve the stability and reliability of the vehicle frame when connected to the vehicle frame, the lower part of the front linkage 5 extends downward to form a front extension 51 for engaging with the front transverse bar of the vehicle frame 100 when the vehicle frame is connected to the vehicle frame 100. In this embodiment, the engagement of the front extension 51 with the front transverse bar further avoids the possibility of swaying of the vehicle frame in the deployed state and further strengthens the load-bearing capacity of the vehicle frame when deployed, ensuring the stability and reliability of the vehicle frame when deployed. In other embodiments, the lower part of the rear linkage 6 extends downward to form a rear extension for engaging with the vehicle frame 100 when the vehicle frame is connected to the vehicle frame 100.

[0061] like Figure 1-7 As shown, for reliable locking and convenient unlocking, the frame locking assembly 7 includes a front locking assembly 71 located between the front frame 31 and the upper connecting seat 1 for locking the front frame 31 relative to the upper connecting seat 1, and a front unlocking assembly 72 that is linked with the front locking assembly 71 is provided on the front frame 31; the frame locking assembly 7 also includes a rear locking assembly 73 located between the rear frame 32 and the upper connecting seat 1 for locking the rear frame 32 relative to the upper connecting seat 1, and a rear unlocking assembly 74 that is linked with the rear locking assembly 73 is provided on the rear frame 32. Specifically, the front locking assembly 71 includes a front locking portion 711 disposed on the upper connecting seat 1 and a front locking member 712 slidably disposed inside the front frame 31 for locking engagement with the front locking portion 711. A front locking elastic member 713 for driving the front locking member 712 to slide back to its original position is provided between the front locking member 712 and the front frame 31. The front unlocking assembly 72 is linked with the front locking member 712. The rear locking assembly 73 includes a rear locking portion 731 disposed on the upper connecting seat 1 and a rear locking member 732 slidably disposed inside the rear frame 32 for locking engagement with the rear locking portion 731. A rear locking elastic member 733 for driving the rear locking member 732 to slide back to its original position is provided between the rear locking member 732 and the rear frame 32. The rear unlocking assembly 74 is linked with the rear locking member 732. During unlocking, the pre-operation unlocking component 72, in conjunction with the front locking member 712, slides relative to the front frame, causing the front locking member 712 to separate from the front locking part 711, thereby releasing the locking state of the front four-bar linkage. Correspondingly, the post-operation unlocking component 74, in conjunction with the rear locking member 732, slides relative to the rear frame, causing the rear locking member 732 to separate from the rear locking part 731, thereby releasing the locking state of the rear four-bar linkage.

[0062] like Figure 5 , 6As shown, the front side of the upper connecting seat 1 is provided with a front guide arc wall 11 for the current frame 31 to abut against the locking end of the front locking member 712 during the rotation of the current frame 31 relative to the upper connecting seat 1, thereby forcing the front locking member 712 to retract into the front frame 31. This effectively prevents the front locking member 712 from being interfered with by other components during the rotation of the front frame 31 relative to the upper connecting seat 1, thus affecting the retraction and extension effect. At the same time, it reduces the friction between the front locking member 712 and the upper connecting seat 1, ensuring smooth retraction and extension. The rear side of the upper connecting seat 1 is provided with a rear guide arc wall 12 for the rear frame 32 to abut against the locking end of the rear locking member 732 during the rotation of the rear frame 32 relative to the upper connecting seat 1, thereby forcing the rear locking member 732 to retract into the rear frame 32. This effectively prevents the rear locking member 732 from being interfered with by other components during the rotation of the rear frame 32 relative to the upper connecting seat 1, thus affecting the retraction and extension effect. At the same time, it reduces the friction between the rear locking member 732 and the upper connecting seat 1, ensuring smooth retraction and extension.

[0063] like Figure 1 , 7 As shown, the upper connecting seat 1 has a front opening groove 13 on its front side for the end of the front frame 31 to be inserted and moved. The upper wall of the front opening groove 13 has a front blocking part 131 for blocking and limiting the front frame 31. By the blocking and limiting cooperation between the two side walls of the front opening groove and the front frame, the radial displacement and misalignment of the front frame relative to the upper connecting seat can be effectively avoided, ensuring that the front frame retracts and expands smoothly relative to the upper connecting seat. In addition, the cooperation between the front blocking part and the front frame can better limit and prompt the folding action, avoiding damage to components due to excessive folding stroke.

[0064] like Figure 1 , 7 As shown, the upper connecting seat 1 has a rear opening groove 14 on its rear side for the rear frame 32 to be inserted into. The upper wall of the rear opening groove 14 has a rear blocking part 141 for blocking and limiting the rear frame 32. By the blocking and limiting cooperation between the two side walls of the rear opening groove and the rear frame, the radial displacement of the rear frame relative to the upper connecting seat can be effectively avoided, ensuring that the rear frame retracts and expands smoothly relative to the upper connecting seat. In addition, the rear blocking part cooperates with the rear frame to better limit and prompt the folding action, avoiding damage to parts due to excessive folding stroke.

[0065] like Figure 1-13As shown, this utility model discloses a multi-functional vehicle, including a retractable frame 100 and a vehicle frame as described above. The frame 100 is provided with a frame connecting seat 110, and the upper connecting seat 100 is provided with a frame adapter 10 detachably connected to the frame connecting seat 110. An adapter locking component 200 for locking the frame adapter 10 relative to the frame connecting seat 110 and an adapter unlocking component 300 that is linked to and releases the adapter locking component 200 are provided between the frame adapter 10 and the frame connecting seat 110. This utility model's multi-functional vehicle, using the aforementioned vehicle frame, can be used as a campervan or a child vehicle, achieving the function of multiple uses in one vehicle. It also enables precise, stable, and efficient retraction and extension. Furthermore, the overall structure is compact when folded, minimizing the overall volume and facilitating subsequent handling and storage.

[0066] like Figure 8-13 As shown, for reliable locking and convenient unlocking, the adapter locking assembly 200 includes an adapter locking part 210 disposed on the frame adapter 10 and an adapter locking member 220 movably disposed on the frame connecting seat 110 and locked in cooperation with the adapter locking part 210. An adapter locking elastic member for driving the adapter locking member 220 to reset is provided between the adapter locking member 220 and the frame connecting seat 110. The adapter unlocking assembly 300 is linked to the adapter locking member 220. Specifically, the adapter locking member 220 is an adapter locking hook. The lower ends of the two adapter locking hooks are respectively hinged to the frame connecting seat 110. The upper parts of the two adapter locking hooks are staggered, and the upper parts of the two adapter locking hooks are provided with staggered elongated holes 230. A linkage rod 240 passes through the two elongated holes 230, and the hook parts of the two adapter locking hooks are used to engage with the corresponding adapter locking part 210. The adapter unlocking assembly 300 includes an unlocking button 310 that can be slidably disposed on the frame adapter 10 and an unlocking top pusher 320 that can be slidably disposed on the frame adapter 10. The upper end of the unlocking top pusher 320 is linked to the inner end of the unlocking button 310, and the lower end of the unlocking top pusher 320 abuts against the adapter locking member 220. An unlocking reset elastic member for driving the unlocking button 310 to slide and reset is provided between the unlocking button 310 and the frame adapter 10. When unlocking, pressing the unlock button 310 causes it to slide relative to the frame adapter 10. The unlock button 310 and the unlock top pusher 320 are linked by two interlocking unlocking inclined walls to drive the unlock top pusher 320 to slide downward relative to the frame adapter 10. The lower end of the frame adapter 10 presses against the upper end of the adapter locking hook, causing the adapter locking hook to rotate downward around the hinge axis between its lower end and the frame connecting seat 110. This causes the hook part of the adapter locking hook to separate from the adapter locking part 210, thereby releasing the locking state of the frame adapter 10 relative to the frame connecting seat 110.

Claims

1. A vehicle frame, characterized in that... include: Upper connecting seat (1), wherein the upper connecting seat (1) is provided with a vertical rod group (2) extending downward; The frame assembly (3) includes a front frame (31) whose end is pivotally connected to the front side of the upper connecting seat (1) and a rear frame (32) whose end is pivotally connected to the rear side of the upper connecting seat (1). The underframe assembly (4) includes a front underframe (41) whose end is pivotally connected to the lower end of the vertical rod group (2) and a rear underframe (42) whose end is pivotally connected to the lower end of the vertical rod group (2); The front linkage (5) is directly or indirectly pivotally connected to the front frame (31) at its upper end and pivotally connected to the front base frame (41) at its lower part. The front linkage (5), the front frame (31), the upper connecting seat (1), the vertical rod group (2) and the front base frame (41) are connected to form a front four-bar linkage mechanism. The rear linkage (6) is directly or indirectly pivotally connected to the rear frame (32) at its upper end and pivotally connected to the rear base frame (42) at its lower part. The rear linkage (6), the rear frame (32), the upper connecting seat (1), the vertical rod group (2) and the rear base frame (42) are connected to form a rear four-bar linkage mechanism. A frame locking assembly (7) is provided on the vehicle frame for locking the front four-bar linkage and the rear four-bar linkage.

2. The vehicle frame according to claim 1, characterized in that... The vertical rod group (2) includes a front vertical rod (21) and a rear vertical rod (22). The upper ends of the front vertical rod (21) and the rear vertical rod (22) are fixedly connected to the upper connecting seat (1) and are spaced apart from each other. The end of the front base frame (41) is pivotally connected to the lower end of the front vertical rod (21), and the end of the rear base frame (42) is pivotally connected to the lower end of the rear vertical rod (22); The front linkage (5), front frame (31), upper connecting seat (1), front vertical rod (21) and front base frame (41) are connected to form a front four-bar linkage mechanism; The rear linkage (6), rear frame (32), upper connecting seat (1), rear vertical rod (22) and rear base frame (42) are connected to form a rear four-bar linkage mechanism.

3. A vehicle frame according to claim 2, characterized in that... A connecting reinforcing rod (23) is provided between the front vertical rod (21) and the rear vertical rod (22) and below the upper connecting seat (1). The front end of the connecting reinforcing rod (23) is connected to the front vertical rod (21), and the rear end of the connecting reinforcing rod (23) is connected to the rear vertical rod (22).

4. A vehicle frame according to claim 2, characterized in that... A sunken space (20) is formed below the vertical rod group (2), and a sunken space opening (202) is formed between the front frame (31) and the rear frame (32) and at the lower end of the vertical rod group (2).

5. A vehicle frame according to claim 4, characterized in that... The vehicle frame is fitted with a flexible cloth cover (201), and the bottom of the flexible cloth cover (201) extends downward relative to the opening of the sinking space (202) to form a sinking space (20) that communicates with the opening of the sinking space (202).

6. A vehicle frame according to claim 1, characterized in that... The front frame (31) is provided with a downwardly extending front connecting block (311) which is fixedly provided on the front frame (31), and the lower end of the front connecting block (311) is pivotally connected to the upper end of the front linkage (5); the rear frame (32) is provided with a downwardly extending rear connecting block (321) which is fixedly provided on the rear frame (32), and the lower end of the rear connecting block (321) is pivotally connected to the upper end of the rear linkage (6).

7. A vehicle frame according to claim 1, characterized in that... The lower part of the front linkage (5) extends downward to form a front extension (51) for engaging with the front transverse bar of the frame (100) when the vehicle frame is connected to the vehicle frame (100).

8. A vehicle frame according to any one of claims 1-7, characterized in that... The frame locking assembly (7) includes a front locking assembly (71) located between the front frame (31) and the upper connecting seat (1) for locking the front frame (31) relative to the upper connecting seat (1), and the front frame (31) is provided with a front unlocking assembly (72) linked with the front locking assembly (71); the frame locking assembly (7) also includes a rear locking assembly (73) located between the rear frame (32) and the upper connecting seat (1) for locking the rear frame (32) relative to the upper connecting seat (1), and the rear frame (32) is provided with a rear unlocking assembly (74) linked with the rear locking assembly (73).

9. A vehicle frame according to claim 8, characterized in that... The front locking assembly (71) includes a front locking part (711) disposed on the upper connecting seat (1) and a front locking member (712) slidably disposed on the inner side of the front frame (31) for locking with the front locking part (711). A front locking elastic member (713) for driving the front locking member (712) to slide back to its original position is provided between the front locking member (712) and the front frame (31). The front unlocking assembly (72) is linked with the front locking member (712). The rear locking assembly (73) includes a rear locking part (731) disposed on the upper connecting seat (1) and a rear locking member (732) slidably disposed on the inner side of the rear frame (32) for locking with the rear locking part (731). A rear locking elastic member (733) for driving the rear locking member (732) to slide back to its original position is provided between the rear locking member (732) and the rear frame (32). The rear unlocking assembly (74) is linked with the rear locking member (732).

10. A vehicle frame according to claim 9, characterized in that... The upper connecting seat (1) has a front guide arc wall (11) on its front side for abutting the locking end of the front locking member (712) during the rotation of the current frame (31) relative to the upper connecting seat (1) to force the front locking member (712) to retract into the front frame (31); the upper connecting seat (1) has a rear guide arc wall (12) on its rear side for abutting the locking end of the rear locking member (732) during the rotation of the rear frame (32) relative to the upper connecting seat (1) to force the rear locking member (732) to retract into the rear frame (32).

11. A vehicle frame according to claim 1, characterized in that... The upper connecting seat (1) has a front opening groove (13) on its front side for the end of the front frame (31) to be inserted into, and the upper wall of the front opening groove (13) has a front blocking part (131) for blocking and limiting the front frame (31); the upper connecting seat (1) has a rear opening groove (14) on its rear side for the end of the rear frame (32) to be inserted into, and the upper wall of the rear opening groove (14) has a rear blocking part (141) for blocking and limiting the rear frame (32).

12. A multi-functional vehicle, characterized in that... The vehicle includes a retractable frame (100) and a vehicle frame as described in any one of claims 1-11. The frame (100) is provided with a frame connecting seat (110). The upper connecting seat (1) is provided with a frame adapter (10) detachably connected to the frame connecting seat (110). An adapter locking assembly (200) for locking the frame adapter (10) relative to the frame connecting seat (110) and an adapter unlocking assembly (300) for releasing the adapter locking assembly (200) are provided between the frame adapter (10) and the frame connecting seat (110).

13. A multi-functional vehicle according to claim 12, characterized in that... The adapter locking assembly (200) includes an adapter locking part (210) disposed on the frame adapter (10) and an adapter locking member (220) movably disposed on the frame connecting seat (110) and locked in cooperation with the adapter locking part (210). An adapter locking elastic member for driving the adapter locking member (220) to reset is provided between the adapter locking member (220) and the frame connecting seat (110). The adapter unlocking assembly (300) is linked with the adapter locking member (220).

14. A multi-functional vehicle according to claim 13, characterized in that... The adapter locking component (220) is an adapter locking hook. The lower ends of the two adapter locking hooks are respectively hinged to the frame connecting seat (110). The upper parts of the two adapter locking hooks are staggered. The upper parts of the two adapter locking hooks are provided with staggered elongated holes (230). A linkage rod (240) passes through the two elongated holes (230). The hook parts of the two adapter locking hooks are used to engage with the corresponding adapter locking parts (210).

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