Integral stroller frame front tube securement device

Abstract

This utility model discloses an integrated front tube fixing device for a children's stroller frame, comprising a five-cavity tube body and a first positioning block and a second positioning block disposed within the five-cavity tube body. The five-cavity tube body has a through-hole for mounting the headset, and a headset mechanism is disposed within the mounting hole. The first positioning block has a first bowl groove, and the second positioning block has a second bowl groove. The headset mechanism is positioned and engaged within the first and second positioning blocks, and its upper and lower parts are respectively limited by the first and second bowl grooves. This utility model uses an embedded five-cavity tube body to mount the headset, with two positioning blocks for stable positioning. The process is simple, assembly is convenient, and the structure has higher strength and stability.

Description

Technical Field

[0001] This utility model relates to the field of bicycle manufacturing technology, and in particular to an integrated children's bicycle frame front tube fixing device. Background Technology

[0002] Currently, in the bicycle manufacturing industry, especially in traditional children's bicycle frames, a split welding structure is often used, which involves welding the front tube, middle tube, and fork together. This method is prone to stress concentration at the welded parts, affecting the structural strength. Then, a hole needs to be made in the front tube to install the headset, which is the bearing component used to assemble the stem, and then the stem tube is inserted into it.

[0003] Traditional headset installation requires assembling the frame and headset simultaneously. The frame itself is heavy, making assembly difficult and increasing the risk of damage during handling and handling. To ensure structural strength and headset stability, traditional methods first weld the headset in place before using nuts and bolts to secure it. However, welded areas are prone to stress concentration, affecting structural strength and posing risks of weld fatigue fracture and structural failure. Welding also results in poor impact resistance and potential loosening over time. Furthermore, welding requires high precision and is time-consuming, labor-intensive, and complex, increasing labor costs. Additionally, the exposed headset, along with weld seams, detracts from the bike's aesthetics and does not align with modern bicycle design trends. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an integrated children's stroller frame front tube fixing device. It adopts a five-cavity tube body embedded mounting cup assembly, and is used with two positioning blocks for limiting and stabilizing. The process is simple, the assembly is convenient, and the structural strength and stability are higher.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: An integrated children's stroller frame front tube fixing device includes a five-cavity tube body and a first positioning block and a second positioning block disposed within the five-cavity tube body; The five-cavity tube body has a through-hole for mounting the bowl assembly, and a bowl assembly mechanism is installed inside the bowl assembly mounting hole. The first positioning block has a first bowl-shaped groove, and the second positioning block has a second bowl-shaped groove. The bowl assembly mechanism is positioned and engaged within the first and second positioning blocks, and the upper and lower parts of the bowl assembly mechanism are respectively limited by the first and second bowl-shaped grooves.

[0006] Furthermore, the five-cavity tube body has a partition plate that divides the upper cavity and the lower cavity. The first positioning block and the second positioning block are respectively disposed in the upper cavity and the lower cavity. The first bowl-shaped groove is opened at the top of the first positioning block, and the second bowl-shaped groove is opened at the bottom of the second positioning block.

[0007] Furthermore, two vertical reinforcing plates are formed inside the upper cavity of the five-cavity tube body, and a horizontal limiting slot is provided on the first positioning block, which is engaged with the two reinforcing plates.

[0008] Furthermore, the front end of the reinforcing plate is provided with an avoidance opening.

[0009] Furthermore, the bowl assembly includes an upper bowl assembly, a lower bowl assembly, and a supporting tube in the middle; The upper bowl assembly is fitted into the first bowl groove at the top of the first positioning block, and the lower bowl assembly is fitted into the second bowl groove at the bottom of the second positioning block.

[0010] Furthermore, both the first positioning block and the second positioning block have a central hole, and the support tube is assembled inside the central hole.

[0011] Furthermore, the first positioning block is fixed to the five-cavity tube body by a long screw on the bottom side, and the second positioning block is fixed to the five-cavity tube body by a short screw on the bottom side.

[0012] Furthermore, the second positioning block has at least two threaded holes and at least two through holes at its corners, and the first positioning block has at least two threaded holes at its corners. The long screw passes through the five-cavity tube and the through hole of the second positioning block from the bottom and is then locked and fixed with the threaded hole of the first positioning block. The short screw passes through the five-cavity tube from the bottom and is locked and fixed with the threaded hole of the second positioning block.

[0013] Furthermore, the five-cavity tube body is integrally extruded.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects: 1. This utility model, through the design of a five-cavity tube body and the first and second positioning blocks arranged vertically inside it, as well as the first and second bowl grooves opened on the first and second positioning blocks, can position and assemble the upper and lower bowl assemblies. After tightening with nuts, effective fixation can be achieved. In this way, the bowl assembly can be stably positioned without welding, and the risk of weld fatigue fracture existing in traditional welding methods is overcome, welding failure is avoided, structural strength and impact resistance are improved, and the assembly process and process difficulty are simplified. There is no need for multiple positioning and welding, making the operation more convenient and faster, and reducing labor costs.

[0015] 2. This utility model uses a limiting slot on the first positioning block to engage with the two reinforcing plates, and with the addition of long and short screws to lock and fix the first and second positioning blocks, the stability and structural strength of the assembly can be improved, making the positioning and assembly of the bowl assembly more stable.

[0016] 3. This utility model, through the setting of the support tube between the upper and lower cup groups and the design of the center hole on the first and second positioning blocks, assembles the support tube into the center hole. On the one hand, it can improve the coaxiality of the upper and lower parts, ensuring the convenience of assembly and the accuracy of positioning. On the other hand, it can enhance the structural strength and assembly stability of the upper and lower cup groups after the nuts are tightened.

[0017] 4. This utility model conceals and embeds the bowl assembly into the bowl assembly mounting hole of the five-cavity tube body, and uses the first positioning block and the second positioning block for stable positioning. From the outside, the concealed effect is more aesthetically pleasing, and it reduces the erosion of rainwater and dust, making it more durable.

[0018] 5. This utility model differs from the traditional split-welded structure by adopting a one-piece extruded five-cavity tube body, which improves the structural strength and impact resistance, simplifies the assembly process, and reduces the overall structural weight. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure assembly of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the bottom structure of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal structure assembly of an embodiment of the present utility model; Figure 4 This is a vertical cross-sectional structural diagram of an embodiment of the present utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of an embodiment of the present utility model; Figure 6 This is an exploded view of the structure of an embodiment of the present utility model; Figure 7 This is a schematic diagram of the structure of the cavity tube body in Embodiment 5 of this utility model; Figure 8 This is a schematic diagram of the bowl assembly mechanism according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the structure of the first positioning block in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the second positioning block in an embodiment of the present invention; Figure 11 This is a schematic diagram illustrating a usage example of an embodiment of the present utility model; Among them, 1. Five-cavity tube body; 11. Partition plate; 12. Reinforcing plate; 120. Clearance opening; 100. Bowl assembly mounting hole; 2. First positioning block; 20. First bowl mouth groove; 21. Limiting slot; 200. Center hole; 3. Second positioning block; 30. Second bowl mouth groove; 4. Bowl assembly mechanism; 41. Upper bowl assembly; 42. Lower bowl assembly; 43. Support tube; 5. Long screw; 6. Short screw; 7. Branch tube; 8. Middle tube. Detailed Implementation

[0020] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] like Figure 1-11 As shown, this embodiment provides an integrated children's stroller frame front tube fixing device, which mainly consists of a five-cavity tube body 1, a first positioning block 2, a second positioning block 3, and a headset mechanism 4. The five-cavity tube body 1 is integrally extruded. In actual use, it can be referenced... Figure 11 In the example of this model, the two front ends of the upper branch tubes 7 and the front end of the lower middle tube 8, together with the two short tubes at the front end, can be integrally extruded to form the current five-cavity tube body 1, which is the front tube. This integrated frame and the structure of the five-cavity tube body 1 can effectively improve structural strength and impact resistance, simplify the assembly process, and reduce the overall structural weight.

[0022] To position and assemble the bowl assembly mechanism 4, a first positioning block 2 and a second positioning block 3 are provided inside the five-cavity tube 1 in this embodiment. The five-cavity tube 1 has a through-hole 100 for the bowl assembly, allowing the bowl assembly mechanism 4 to be concealed and embedded within the mounting hole 100. The formed five-cavity tube 1 has a partition plate 11 dividing the upper and lower cavities. The first positioning block 2 and the second positioning block 3 are respectively located in the upper and lower cavities. The first positioning block 2 has a first bowl groove 20 at its top, and the second positioning block 3 has a second bowl groove 30 at its bottom. The bowl assembly mechanism 4 is positioned and engaged within the first positioning block 2 and the second positioning block 3, with the upper and lower parts of the bowl assembly mechanism 4 being limited by the first bowl groove 20 and the second bowl groove 30, respectively. This allows for the positioning and assembly of the upper and lower parts of the cup assembly mechanism 4. After tightening with nuts, effective fixation can be achieved. This eliminates the need for welding to achieve stable positioning of the cup assembly, overcomes the risk of weld fatigue fracture associated with traditional welding methods, avoids welding failure, improves structural strength and impact resistance, simplifies the assembly process and reduces technical difficulty, eliminates the need for multiple positioning and welding operations, making operation more convenient and faster, and reducing labor costs.

[0023] To improve structural strength and assembly stability, two vertical reinforcing plates 12 are formed inside the upper cavity of the five-cavity tube body 1 in this embodiment. A horizontal limiting slot 21 is provided on the first positioning block 2. The first positioning block 2 is U-shaped, and the limiting slot 21 of the first positioning block 2 engages with the two reinforcing plates 12, thus making the assembly of the first positioning block 2 more stable. At the same time, an avoidance opening 120 is also provided at the front end of the reinforcing plate 12, allowing the first positioning block 2 to fit snugly into it, thereby improving the assembly rationality of the structure while ensuring the strength of the five-cavity tube body 1.

[0024] Specifically, the bowl assembly 4 in this embodiment includes an upper bowl assembly 41, a lower bowl assembly 42, and a supporting tube 43 in the middle. The upper bowl assembly 41 is fitted into the first bowl groove 20 at the top of the first positioning block 2, and the lower bowl assembly 42 is fitted into the second bowl groove 30 at the bottom of the second positioning block 3. Both the first positioning block 2 and the second positioning block 3 have a central hole 200, and the supporting tube 43 is fitted into the central hole 200. Fitting the supporting tube 43 into the central hole 200 in this way can improve the coaxiality of the upper and lower parts, ensuring convenient assembly and positioning accuracy. On the other hand, it can enhance the structural strength and assembly stability of the upper bowl assembly 41 and the lower bowl assembly 42 after the nut is tightened.

[0025] In addition, to further improve assembly stability, in this embodiment, the first positioning block 2 is fixed to the five-cavity tube 1 by two long screws 5 on the bottom side, and the second positioning block 3 is fixed to the five-cavity tube 1 by two short screws 6 on the bottom side. The second positioning block 3 has two threaded holes and two through holes at opposite corners, and the first positioning block 2 has two threaded holes at opposite corners. The two long screws 5 pass through the through holes of the five-cavity tube 1 and the second positioning block 3 from the bottom and are then locked in place with the threaded holes of the first positioning block 2. The two short screws 6 pass through the five-cavity tube 1 from the bottom and are locked in place with the threaded holes of the second positioning block 3. Of course, the locking method of this utility model is not limited to this. The locking method in this embodiment is the optimal solution chosen for ease of assembly and consideration of processing errors. By using the limiting slot 21 on the first positioning block 2 to engage with the two reinforcing plates 12, and by using the two long screws 5 and the two short screws 6 to lock and fix the first positioning block 2 and the second positioning block 3, the stability of the assembly and the structural strength can be improved, making the positioning assembly of the bowl assembly more stable.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The above specific embodiments further illustrate the technical problems solved by this utility model, the technical solutions, and the beneficial effects. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. 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 integral stroller frame front tube securement device, characterized by: It includes a five-lumen tube body (1) and a first positioning block (2) and a second positioning block (3) disposed within the five-lumen tube body (1); The five-cavity tube body (1) is provided with a bowl assembly mounting hole (100) that runs vertically through the tube, and a bowl assembly mechanism (4) is provided inside the bowl assembly mounting hole (100). The first positioning block (2) has a first bowl groove (20), and the second positioning block (3) has a second bowl groove (30). The bowl assembly mechanism (4) is positioned and engaged in the first positioning block (2) and the second positioning block (3). The upper and lower parts of the bowl assembly mechanism (4) are respectively limited by the first bowl groove (20) and the second bowl groove (30).

2. The integral stroller frame front tube securement device of claim 1, wherein: The five-cavity tube body (1) has a partition plate (11) that divides the upper cavity and the lower cavity. The first positioning block (2) and the second positioning block (3) are respectively located in the upper cavity and the lower cavity. The first bowl groove (20) is opened on the top of the first positioning block (2), and the second bowl groove (30) is opened on the bottom of the second positioning block (3).

3. The integral stroller frame front tube securement device of claim 2, wherein: The upper cavity of the five-cavity tube (1) has two vertical reinforcing plates (12) formed inside. The first positioning block (2) has a horizontal limiting slot (21) which is engaged with the two reinforcing plates (12).

4. The integral stroller frame front tube securement device of claim 3, wherein: The front end of the reinforcing plate (12) is provided with an avoidance opening (120).

5. The integral stroller frame front tube securement of claim 2, wherein: The bowl assembly (4) includes an upper bowl assembly (41), a lower bowl assembly (42), and a middle support tube (43). The upper bowl assembly (41) is fitted into the first bowl groove (20) at the top of the first positioning block (2), and the lower bowl assembly (42) is fitted into the second bowl groove (30) at the bottom of the second positioning block (3).

6. The integral stroller frame front tube securement device of claim 5, wherein: The first positioning block (2) and the second positioning block (3) are both provided with a central hole (200), and the support tube (43) is assembled in the central hole (200).

7. The integral stroller frame front tube securement device of claim 2, wherein: The first positioning block (2) is fixed to the five-cavity tube body (1) by a long screw (5) on the bottom side, and the second positioning block (3) is fixed to the five-cavity tube body (1) by a short screw (6) on the bottom side.

8. The integral stroller frame front tube securement device of claim 7, wherein: The second positioning block (3) has at least two threaded holes and at least two through holes at its corners. The first positioning block (2) has at least two threaded holes at its corners. The long screw (5) passes through the five-cavity tube (1) and the through hole of the second positioning block (3) from the bottom and is then locked and fixed with the threaded hole of the first positioning block (2). The short screw (6) passes through the five-cavity tube (1) from the bottom and is locked and fixed with the threaded hole of the second positioning block (3).

9. The integral stroller frame front tube securement device of claim 1, wherein: The five-cavity tube (1) is integrally extruded.

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