A child trailer integration device

Abstract

The utility model relates to children's trailer technical field especially, it relates to a children's trailer integration device, aims at solving the problem of the unstable connection of front wheel steering axle and frame in the existing children's trailer, including the frame tube, front wheel steering axle, clamping structure and socket seat, wherein the lower part of the front end of frame tube is equipped with the inserted section, and the inserted section forms stable connection through the cooperation with the socket seat on the front wheel steering axle, the inserted section and socket seat are through the interference fit of center positioning column and through -hole, have guaranteed radial positioning and axial location, have strengthened the stability of connection, the utility model has the advantages of simplifying assembly, improving stability, enhancing the shock resistance and impact resistance etc, can effectively improve the safety and service life of children's trailer.

Description

Technical Field

[0001] This utility model relates to the field of child trailer technology, and in particular to an integrated device for child trailers. Background Technology

[0002] Currently, child trailers are a common baby product widely used in daily travel, providing a convenient and safe riding environment. As people's demands for child safety and ease of use gradually increase, existing child trailer designs mostly adopt modular structures, including trailer frames, wheel systems, and front-wheel steering systems. However, existing technologies still have certain structural shortcomings, such as complex connection methods for various components, which can easily lead to instability or loosening during assembly, thus affecting the trailer's stability and safety.

[0003] For example, in existing child trailers, the front wheel steering axle is often connected to the frame using threaded connections, riveting, or welding. While these methods improve connection strength to some extent, they also increase the complexity of the manufacturing process. Furthermore, during use, factors such as vibration and impact can cause the connecting parts to loosen, affecting the overall structural stability. In addition, the front wheel steering system of a child trailer, as a key component for controlling direction and stability, has a significant impact on overall performance due to its connection design. Traditional steering structure designs often prioritize functionality but neglect ease of assembly and connection stability, leading to wear and loosening issues after prolonged use. Therefore, designing an integrated device for child trailers is essential. Utility Model Content

[0004] The purpose of this invention is to provide an integrated child trailer device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an integrated device for a child trailer, including a frame tube, a front wheel steering shaft and a snap-fit ​​structure, wherein the lower front end of the frame tube is provided with a plug-in section and the middle of the plug-in section is provided with a through hole; the upper end of the front wheel steering shaft is fixed with a sleeve seat, the sleeve seat including an outer ring seat and a central positioning post, and the inner wall of the outer ring seat is provided with an annular slot. The plug segment is inserted into the socket, the through hole and the center positioning post are fitted together, and the end face of the plug segment abuts against the end face of the outer ring seat, thereby achieving radial positioning and axial limiting.

[0006] According to the above technical solution, the plug section is an integrally injection-molded cylindrical structure with a smooth mating surface on its outer surface, which is used to fit tightly with the annular slot.

[0007] According to the above technical solution, the top of the central positioning post is provided with a guide chamfer to guide the insertion of the through hole of the plug section, which facilitates assembly.

[0008] According to the above technical solution, the socket includes several radial connecting ribs, which connect the central positioning post to the outer ring seat to maintain coaxiality and improve structural rigidity.

[0009] According to the above technical solution, the end face of the insertion segment abuts against the end face of the outer ring seat to form an axial limit, thereby preventing loosening.

[0010] According to the above technical solution, the through hole and the central positioning post are interference fit to improve the stability of radial positioning and the reliability of connection.

[0011] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model, through the matching structure of the plug-in section and the socket, uses the interference fit between the central positioning post and the through hole to achieve radial positioning, and achieves axial limiting through the abutment between the end face of the plug-in section and the end face of the outer ring seat, thus forming a stable and reliable connection. This design not only simplifies the assembly process and avoids complex processes such as threading, riveting, or welding, but also effectively withstands the vibration and impact loads during the operation of the child trailer, significantly improving the stability and durability of the connection. Therefore, this utility model, while ensuring safety, improves assembly efficiency and service life, and solves the problems of easy loosening and insufficient stability in existing technologies. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an integrated child trailer device proposed in this utility model; Figure 2 This is a schematic diagram of the socket structure in an integrated device for a child trailer proposed in this utility model; Figure 3 This is a schematic diagram of the plug-in section structure in an integrated child trailer device proposed in this utility model.

[0013] In the diagram: 1. Frame tube; 2. Front wheel steering shaft; 3. Snap-fit ​​structure; 31. Socket; 32. Insertion section; 33. Through hole; 34. Center positioning post; 35. Annular slot; 36. Outer ring seat. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example: Reference Figure 1-3 An integrated device for a child trailer includes a frame tube 1, a front wheel steering shaft 2, a snap-fit ​​structure 3, a socket 31, a plug section 32, a through hole 33, a central positioning post 34, an annular slot 35, and an outer ring seat 36.

[0016] The frame tube 1 serves as the frame tube for both sides of the child trailer, with a plug-in section 32 at its lower front end. The plug-in section 32 is a one-piece injection-molded plastic structure, cylindrical in shape, with an insertion portion at its end for mating with the socket 31 on the front wheel steering axle 2. A circular through hole 33 is provided in the center of the plug-in section 32, extending axially for insertion into the central positioning post 34 of the socket 31. The outer surface of the plug-in section 32 forms a smooth mating surface for tight contact with the annular slot 35 of the socket 31, ensuring insertion stability.

[0017] The front wheel steering axle 2 is vertically positioned, with a socket 31 fixed to its upper end. The socket 31 is an integrally injection-molded annular seat, mainly composed of an outer ring seat 36, a central positioning post 34, and several radial connecting ribs. The inner wall of the outer ring seat 36 forms an annular slot 35, which mates with the outer surface of the insertion section 32. The end face of the outer ring seat 36 forms a bearing platform, which abuts against the end face of the insertion section 32, forming an axial limit. The central positioning post 34 is located at the center of the socket 31, protruding upward along the axial direction. It has a cylindrical cross-section, and its outer circle is inserted into the through hole 33 of the insertion section 32. The top end is provided with a guide chamfer to facilitate the guiding installation of the insertion section 32. Several radial connecting ribs connect the central positioning post 34 and the outer ring seat 36, which can maintain coaxiality, reduce overall weight, and improve structural rigidity.

[0018] The snap-fit ​​structure 3 includes a plug section 32 and a socket 31. After the plug section 32 is inserted into the socket 31, the through hole 33 of the plug section 32 is fitted with the central positioning post 34 to ensure radial positioning; the end face of the plug section 32 abuts against the bearing surface of the outer ring seat 36 to achieve axial limiting.

[0019] During assembly, the insert section 32 of the frame tube 1 is first inserted into the socket 31 of the front wheel steering shaft 2, so that the through hole 33 and the center positioning post 34 are fitted together, and the end face of the insert section 32 abuts against the end face of the outer ring seat 36. Through the interference fit formed by the center positioning post 34 and the through hole 33, the coaxiality and stability between the insert section 32 and the socket 31 are ensured, and the assembly of the frame tube 1 and the front wheel steering shaft 2 is completed.

[0020] Through the above structure, a stable and reliable connection is achieved between the frame tube 1 and the front wheel steering shaft 2. The center positioning post 34 and the through hole 33 provide radial positioning, while the end face of the bearing platform and the end face of the insertion section provide axial restraint, which can effectively withstand the vibration and impact loads during trailer use.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated device for a child trailer, characterized in that, Including a frame tube (1), a front wheel steering axle (2), and a snap-fit ​​structure (3), characterized in that: The lower front end of the frame tube (1) is provided with a plug section (32), and the middle part of the plug section (32) is provided with a through hole (33); the upper end of the front wheel steering shaft (2) is fixed with a socket (31), the socket (31) includes an outer ring seat (36) and a central positioning post (34), and the inner wall of the outer ring seat (36) is provided with an annular slot (35). The plug section (32) is inserted into the socket (31), the through hole (33) is fitted with the center positioning post (34), and the end face of the plug section (32) abuts against the end face of the outer ring seat (36), thereby achieving radial positioning and axial limiting.

2. The integrated child trailer device according to claim 1, characterized in that, The plug section (32) is an integrally injection-molded cylindrical structure with a smooth mating surface on its outer surface, which is used to fit tightly with the annular slot (35).

3. The integrated child trailer device according to claim 1, characterized in that, The top of the central positioning post (34) is provided with a guide chamfer to guide the insertion of the through hole (33) of the plug section (32) for easy assembly.

4. The integrated child trailer device according to claim 1, characterized in that, The socket (31) includes several radial connecting ribs that connect the central positioning post (34) to the outer ring seat (36) to maintain coaxiality and improve structural rigidity.

5. The integrated child trailer device according to claim 1, characterized in that, The end face of the insertion section (32) abuts against the end face of the outer ring seat (36) to form an axial limit, thereby preventing loosening.

6. The integrated child trailer device according to claim 1, characterized in that, The through hole (33) and the center positioning post (34) are interference fit to improve the stability of radial positioning and the reliability of connection.

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