Anti-fracture safety rear axle structure of three-wheel baby carriage

Abstract

The utility model relates to the field of buggies, and discloses an anti-fracture safety rear axle structure of a three-wheel buggy, which comprises two wheels, bearings are fixedly arranged in the two wheels, a main shaft is fixedly arranged between the two bearings, two reinforcing rings are fixedly arranged on the outer wall of the main shaft, and the two reinforcing rings are fixedly arranged on the outer wall of the main shaft. Two connecting blocks are arranged on the outer wall of the main shaft, two fixing blocks are arranged on the outer wall of the main shaft, clamping grooves are formed in the connecting blocks and the fixing blocks, and the clamping grooves are movably connected with the outer wall of the reinforcing ring in a clamped mode. In the utility model, the local stress can be effectively reduced by increasing the stress area, the reduction of the local stress is beneficial to avoiding the generation and expansion of cracks caused by stress concentration, and meanwhile, the overall stability can be improved by increasing the stress area, so that the structure is more stable when being subjected to impact or non-uniform load; and the fracture risk caused by instability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of baby carriages, in particular to a fracture-proof safety rear axle structure of a three-wheeled baby carriage. Background Art

[0002] Baby carriages are a major category of children's toys, and are designed as a means of transportation for infants or children. They usually consist of a frame and wheels to meet the mobility and transportation needs of children. Baby carriages are also called baby carriages, child carriages, or strollers. There are many types of baby carriages, including children's bicycles, child strollers, baby walkers, children's tricycles, and children's electric toy cars.

[0003] The rear axle of a three-wheeled baby stroller is an important part of the baby stroller. It connects the rear wheels and the frame of the tricycle, and plays the role of transmitting power and supporting the body. In the design of a three-wheeled baby stroller, the rear axle usually needs to have a certain strength and durability to adapt to the various activities and loads when children use it. The rear axle of a three-wheeled baby stroller usually consists of a shaft, bearings, shaft ends and other parts. The shaft is the main body of the rear axle, which connects the two rear wheels and is connected to the wheels through bearings. The shaft end is used to fix the rear axle to the frame.

[0004] The above scheme still has the following disadvantages: since the rear axle not only has to bear the weight of the tricycle during use, but also needs to withstand the vibration during movement, it is prone to breakage. The breakage of the conventional straight-axle rear axle will affect the stability of the entire tricycle, causing the vehicle to roll over and become unusable, which lacks safety. For this reason, we propose an anti-fracture safety rear axle structure for a three-wheeled children's vehicle. Utility Model Content

[0005] The purpose of the utility model is to provide a fracture-proof safety rear axle structure of a three-wheeled baby carriage, so as to solve the problem that the rear axle not only has to bear the weight of the three-wheeled vehicle during use, but also needs to bear the vibration occurring during the movement, and is prone to fracture. The fracture of the conventional straight-axle rear axle will affect the stability of the entire three-wheeled vehicle, causing the vehicle to roll over and become unusable, thereby lacking safety.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a fracture-proof safety rear axle structure of a three-wheeled baby carriage, comprising two wheels, bearings are fixedly installed inside the two wheels, a main shaft is fixedly installed between the two bearings, two reinforcement rings are fixedly installed on the outer wall of the main shaft, two connecting blocks are provided on the outer wall of the main shaft, two fixing blocks are provided on the outer wall of the main shaft, and the connecting blocks and the fixing blocks are provided with clamping grooves inside, and the clamping grooves are movably clamped with the outer walls of the reinforcement rings.

[0007] Preferably, a vacuum groove is provided inside the main shaft.

[0008] Preferably, mounting plates are fixedly installed on both sides of the connecting block, two fixing plates are fixedly installed on the outer wall of the fixing block, a thread groove begins to be provided on the top surface of the fixing plate, the internal thread of the mounting plate is connected with a bolt, and one end of the bolt passes through the interior of the mounting plate and is threadedly connected to the inner wall of the thread groove.

[0009] Preferably, a protective cover is fixedly installed between the two connecting blocks, and a protective shield is fixedly installed between the two fixing blocks.

[0010] Preferably, the outer wall of the main shaft is provided with two clamping plates, a plurality of threaded columns are fixedly mounted on the outer wall of the main shaft, and the clamping plates are movably plugged into the outer wall of the threaded columns.

[0011] Preferably, the outer wall of the threaded column is threadedly connected with a nut.

[0012] Compared with the prior art, the anti-fracture safety rear axle structure of a three-wheeled baby carriage adopting the above technical solution has the following beneficial effects:

[0013] 1. When in use, by increasing the stress-bearing area, local stress can be effectively reduced. The reduction of local stress helps to avoid the generation and expansion of cracks caused by stress concentration. At the same time, increasing the stress-bearing area can improve the overall stability, making the structure more stable when subjected to impact or uneven load, reducing the risk of fracture caused by instability;

[0014] Second, the vacuum groove can transform the spindle into a closed tubular structure. Compared with a solid shaft, the rear axle can provide higher strength and rigidity while maintaining the same weight. The threaded groove can connect the connecting block and the fixing block through the mounting plate and the fixing plate, which is convenient for loading and unloading and improves practicality. Through the protective cover, when the connecting block and the fixing block are connected, the protective cover fits with the protective cover to protect the spindle, prevent foreign objects from directly hitting the spindle, reduce the risk of accidental damage, and improve the anti-fracture effect.

[0015] 3. Through the clamping plate, when the main shaft breaks, the two clamping plates still clamp the main shaft to prevent the bearing from tilting after the main shaft breaks, causing the baby carriage to roll over, thereby improving the safety of the rear axle. Through the nut, the clamping plate can be fixed to the surface of the main shaft through the threaded column, and it is easy to load and unload it, which improves practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2It is an exploded schematic diagram of an embodiment.

[0018] Figure 3 It is a schematic diagram of an explosion at a connecting block in an embodiment.

[0019] Figure 4 It is a schematic diagram of the explosion at the clamping plate in the embodiment.

[0020] In the figure: 1. wheel; 2. bearing; 3. main shaft; 4. reinforcement ring; 5. connecting block; 6. fixing block; 7. snap-in groove; 8. mounting plate; 9. fixing plate; 10. threaded groove; 11. bolt; 12. protective cover; 13. protective cover; 14. vacuum groove; 15. clamping plate; 16. threaded column; 17. nut. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 3 As shown, a fracture-proof safety rear axle structure of a three-wheeled baby carriage comprises two wheels 1, bearings 2 are fixedly installed inside the two wheels 1, a main shaft 3 is fixedly installed between the two bearings 2, two reinforcement rings 4 are fixedly installed on the outer wall of the main shaft 3, a connecting block 5 is provided on the outer wall of the main shaft 3, two fixing blocks 6 are provided on the outer wall of the main shaft 3, and clamping grooves 7 are provided inside the connecting blocks 5 and the fixing blocks 6, and the clamping grooves 7 are movably clamped with the outer wall of the reinforcement ring 4.

[0023] During use, the connecting block 5 can be connected to the stroller frame through the connecting block 5, and then the connecting block 5 can be clamped with the reinforcement ring 4. The reinforcement ring 4 and the connecting block 5 can effectively increase the stress area at the connection between the main shaft 3 and the stroller frame. By increasing the stress area, the local stress can be effectively reduced. The reduction of local stress helps to avoid the generation and expansion of cracks caused by stress concentration. At the same time, increasing the stress area can improve the overall stability, so that when subjected to impact or uneven load, the structure is more stable, reducing the risk of fracture due to instability.

[0024] like Figure 2-Figure 4 As shown, a vacuum groove 14 is opened inside the main shaft 3, mounting plates 8 are fixedly installed on both sides of the connecting block 5, two fixing plates 9 are fixedly installed on the outer wall of the fixing block 6, a thread groove 10 begins on the top surface of the fixing plate 9, and the internal thread of the mounting plate 8 is connected with a bolt 11, and one end of the bolt 11 passes through the interior of the mounting plate 8 and is threadedly connected to the inner wall of the thread groove 10.

[0025] During use, the vacuum groove 14 can transform the main shaft 3 into a closed tubular structure. Compared with a solid shaft, the rear shaft can provide higher strength and rigidity while maintaining the same weight. The threaded groove 10 can connect the connecting block 5 and the fixing block 6 through the mounting plate 8 and the fixing plate 9, which is convenient for loading and unloading and improves practicality. Through the protective cover 12, when the connecting block 5 and the fixing block 6 are connected, the protective cover 12 fits with the protective cover 13 to protect the main shaft 3, prevent foreign objects from directly hitting the main shaft 3, reduce the risk of accidental damage, and improve the anti-fracture effect.

[0026] like Figure 1-Figure 4 As shown, a protective cover 12 is fixedly installed between the two connecting blocks 5, a protective cover 13 is fixedly installed between the two fixing blocks 6, two clamping plates 15 are provided on the outer wall of the main shaft 3, and a plurality of threaded columns 16 are fixedly installed on the outer wall of the main shaft 3. The clamping plates 15 can be movably inserted into the outer wall of the threaded column 16, and the outer wall of the threaded column 16 is threadedly connected with a nut 17.

[0027] During use, through the clamping plate 15, when the main shaft 3 breaks, the two clamping plates 15 still clamp the main shaft 3 to prevent the bearing 2 from tilting after the main shaft 3 breaks, causing the baby carriage to roll over, thereby improving the safety of the rear axle. Through the nut 17, the clamping plate 15 can be fixed to the surface of the main shaft 3 through the threaded column 16, and it is convenient to load and unload it, thereby improving practicality.

[0028] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A fracture-proof safety rear axle structure of a three-wheeled baby carriage, comprising two wheels (1), characterized in that: Bearings (2) are fixedly installed inside the two wheels (1), a main shaft (3) is fixedly installed between the two bearings (2), two reinforcement rings (4) are fixedly installed on the outer wall of the main shaft (3), two connecting blocks (5) are arranged on the outer wall of the main shaft (3), two fixing blocks (6) are arranged on the outer wall of the main shaft (3), and the connecting blocks (5) and the fixing blocks (6) are both provided with engaging grooves (7) inside, and the engaging grooves (7) are movably engaged with the outer wall of the reinforcement ring (4).

2. The anti-fracture safety rear axle structure of a three-wheeled baby carriage according to claim 1, characterized in that: A vacuum groove (14) is provided inside the main shaft (3).

3. The anti-fracture safety rear axle structure of a three-wheeled baby carriage according to claim 1, characterized in that: Mounting plates (8) are fixedly mounted on both sides of the connection block (5); two fixing plates (9) are fixedly mounted on the outer wall of the fixing block (6); a threaded groove (10) is formed at the top surface of the fixing plate (9); a bolt (11) is threadedly connected to the inside of the mounting plate (8); one end of the bolt (11) passes through the inside of the mounting plate (8) and is threadedly connected to the inner wall of the threaded groove (10).

4. The anti-fracture safety rear axle structure of a three-wheeled baby carriage according to claim 1, characterized in that: A protective cover (12) is fixedly installed between the two connecting blocks (5), and a protective cover (13) is fixedly installed between the two fixing blocks (6).

5. The anti-fracture safety rear axle structure of a three-wheeled baby carriage according to claim 1, characterized in that: The outer wall of the main shaft (3) is provided with two clamping plates (15), and a plurality of threaded columns (16) are fixedly mounted on the outer wall of the main shaft (3), and the clamping plates (15) are movably plugged into the outer wall of the threaded columns (16).

6. The anti-fracture safety rear axle structure of a three-wheeled baby carriage according to claim 5, characterized in that: The outer wall of the threaded column (16) is threadedly connected with a nut (17).

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