A steering structure of an electrically powered baby carriage

Abstract

The utility model discloses a kind of steering structure of electric baby carriage, including steering shaft, one end of the steering shaft is fixedly connected with spline sleeve, the inner wall of the spline sleeve is slidably connected with spline shaft of hollow structure, one end of the spline shaft is fixedly connected with steering wheel, the inside of the spline shaft is placed with U type metal pole, the outer wall of the U type metal pole is fixedly equipped with convex column, the inner wall of the spline shaft is provided with annular groove. The utility model is through the sliding connection of spline shaft and spline sleeve, cooperate by the quick locking mechanism that U type metal pole, convex column and torsional spring constitute, realized the stepless telescopic of steering wheel and multi-gear lock solid, can adapt to children of different height and body shape;Through the composite support structure that roller bearing, joint bearing and ball head connecting rod are composed, and by work type mounting bracket provides firm installation, greatly enhance the radial stability of steering shaft, avoid steering virtual position.

Description

Technical Field

[0001] This utility model relates to the field of electric children's vehicle technology, and in particular to a steering structure for an electric children's vehicle. Background Technology

[0002] Electric children's vehicles are miniature electric vehicles designed specifically for children. They are typically powered by rechargeable batteries and propelled forward by an electric motor. They mimic the shape and operation of real cars, equipped with basic control devices such as a steering wheel, accelerator pedal, and brakes. They travel at relatively slow speeds and prioritize safety, primarily providing entertainment and early driving experiences for children. They are commonly found in flat areas such as family yards and parks.

[0003] In existing technologies, the steering wheel position in electric strollers is usually fixed, and it is impossible to adjust the fore-and-aft position according to the child's height, body shape, and sitting posture. This may affect the driving comfort and steering safety of children at different stages of growth due to improper operating posture. Furthermore, the traditional steering structure has a rudimentary design for supporting the steering shaft, often using a single fixed component. This makes the steering shaft prone to radial wobble during rotation, which not only aggravates component wear but also leads to play problems. Therefore, we propose a steering structure for electric strollers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a steering structure for an electric children's vehicle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steering structure for an electric children's vehicle includes a steering shaft. One end of the steering shaft is fixedly connected to a spline sleeve. A hollow spline shaft is slidably connected to the inner wall of the spline sleeve. One end of the spline shaft is fixedly connected to a steering wheel. A U-shaped metal rod is placed inside the spline shaft. A convex post is fixedly sleeved on the outer wall of the U-shaped metal rod. An annular groove is formed on the inner wall of the spline shaft. The inner wall of the annular groove is rotatably connected to the outer wall of the convex post. A torsion spring is sleeved on the outer wall of the U-shaped metal rod. A shift groove is formed on the outer wall of the spline sleeve. Two arc-shaped grooves are formed on the outer wall of the spline shaft. The inner walls of the two arc-shaped grooves are slidably connected to the outer walls of both ends of the U-shaped metal rod. One end of the U-shaped metal rod is located inside the shift groove. A steering assembly is provided at one end of the steering shaft.

[0007] Preferably, the steering assembly includes two ball joints, two steering plates are fixedly connected to the outer wall of the steering shaft, one end of each ball joint is fixedly connected to the outer wall of one of the steering plates, and the other end of each ball joint is fixedly connected to a wheel. The ball joint structures at both ends of the ball joints have multi-directional rotational flexibility.

[0008] Preferably, a rubber sleeve is fixedly connected to the outer wall of the spline shaft.

[0009] Preferably, a roller bearing is fixedly sleeved on the outer wall of the steering shaft, which reduces the frictional resistance when the steering shaft rotates.

[0010] Preferably, a spherical bearing is fixedly sleeved on the outer wall of the steering shaft, and an I-shaped mounting bracket is fixedly connected to the outer wall of the spherical bearing. The I-shaped mounting bracket is a connecting component between the steering structure and the electric children's vehicle body.

[0011] Preferably, one end of the torsion spring is fixedly connected to the outer wall of the convex column, and the other end of the torsion spring is fixedly connected to the inner wall of the spline shaft.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This solution achieves stepless extension and multi-position locking of the steering wheel through the sliding connection between the spline shaft and the spline sleeve, combined with a quick-locking mechanism consisting of a U-shaped metal rod, a convex column, and a torsion spring, making it suitable for children of different heights and body types. The composite support structure composed of roller bearings, spherical bearings, and ball joints, along with a stable mounting bracket, greatly enhances the radial stability of the steering shaft and avoids steering play. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the steering structure of an electric children's vehicle proposed in this utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the steering structure of an electric children's vehicle proposed in this utility model.

[0017] Figure 3 This utility model proposes a steering structure for an electric children's vehicle. Figure 2 A magnified structural diagram of part A in the diagram;

[0018] Figure 4 This is a schematic diagram of the spline sleeve and spline shaft structure of the steering structure of an electric children's vehicle proposed in this utility model.

[0019] In the diagram: 1. Steering shaft; 2. Spline sleeve; 3. Rubber bushing; 4. Spline shaft; 5. Steering wheel; 6. U-shaped metal rod; 7. Convex column; 8. Torsion spring; 9. Shift groove; 10. Roller bearing; 11. Steering pad; 12. Spherical plain bearing; 13. I-beam mounting bracket; 14. Ball joint connecting rod; 15. Wheel. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Depend on Figures 1-4 As shown, a steering structure for an electric children's vehicle is disclosed, including a steering shaft 1. A spline sleeve 2 is fixedly connected to one end of the steering shaft 1. A hollow spline shaft 4 is slidably connected to the inner wall of the spline sleeve 2. The spline shaft 4 and the spline shaft 4 cooperate to transmit huge torque without slipping, and at the same time provide a guide track for the axial sliding of the spline shaft 4. A rubber sleeve 3 is fixedly connected to the outer wall of the spline shaft 4.

[0022] One end of the spline shaft 4 is fixedly connected to the steering wheel 5. A U-shaped metal rod 6 is placed inside the spline shaft 4. The U-shaped metal rod 6 achieves the positioning and unlocking of the steering wheel 5 by changing its own position. The U-shaped structure makes the force on both ends balanced, ensuring that the action is synchronized during adjustment and avoiding jamming.

[0023] A convex post 7 is fixedly fitted onto the outer wall of the U-shaped metal rod 6. An annular groove is formed on the inner wall of the spline shaft 4. The inner wall of the annular groove is rotatably connected to the outer wall of the convex post 7. The convex post 7 provides stable support and guidance for the U-shaped metal rod 6, restricting its movement to only along the annular groove. A torsion spring 8 is fitted onto the outer wall of the U-shaped metal rod 6. One end of the torsion spring 8 is fixedly connected to the outer wall of the convex post 7, and the other end of the torsion spring 8 is fixedly connected to the inner wall of the spline shaft 4. A shift groove 9 is formed on the outer wall of the spline sleeve 2. Two arc-shaped grooves are formed on the outer wall of the spline shaft 4. The inner walls of the two arc-shaped grooves are slidably connected to the outer walls of both ends of the U-shaped metal rod 6, and one end of the U-shaped metal rod 6 is located inside the shift groove 9.

[0024] A roller bearing 10 is fixedly sleeved on the outer wall of the steering shaft 1. The roller bearing 10 reduces the frictional resistance when the steering shaft 1 rotates. A spherical bearing 12 is fixedly sleeved on the outer wall of the steering shaft 1. The spherical bearing 12 can adapt to the slight angular deviation of the steering shaft 1 during the steering process and avoid steering jamming. An I-shaped mounting bracket 13 is fixedly connected to the outer wall of the spherical bearing 12.

[0025] One end of the steering shaft 1 is provided with a steering assembly, which includes two ball joints 14. The ball joint structure at both ends of the ball joints 14 has multi-directional rotational flexibility, which can smoothly convert the swing of the steering vane 11 into the steering action of the wheel 15. Two steering vanes 11 are fixedly connected to the outer wall of the steering shaft 1. One end of each of the two ball joints 14 is fixedly connected to the outer wall of one of the steering vanes 11 through the inner wall of the ball joint. The other end of each of the two ball joints 14 is fixedly connected to a wheel 15 through the inner wall of the ball joint.

[0026] Working principle: The roller bearing 10 and the I-shaped mounting bracket 13 are fixed inside the electric children's car with existing screws. When the electric children's car turns, the steering wheel 5 is turned. The steering wheel 5 drives the spline shaft 4 to rotate. Since the spline shaft 4 is slidably connected to the inner wall of the spline sleeve 2 and the spline sleeve 2 is fixed to one end of the steering shaft 1, the rotation of the spline shaft 4 is transmitted to the steering shaft 1 through the spline sleeve 2. When the steering shaft 1 rotates, the two steering pieces 11 fixed to its outer wall rotate synchronously. The steering pieces 11 drive the two ball joint connecting rods 14 to rotate. The two wheels 15 connected to the other end of the two ball joint connecting rods 14 turn accordingly, thus realizing steering.

[0027] The roller bearing 10 fixed to the outer wall of the steering shaft 1 ensures its smooth rotation, while the spherical bearing 12 and the I-shaped mounting bracket 13 fixed to the outer wall provide stable support for the steering shaft 1 without affecting the steering action.

[0028] When it is necessary to adjust the extension and retraction of the steering wheel 5, move one end of the U-shaped metal rod 6 along the strip groove, thereby causing the convex column 7 to rotate in the annular groove on the inner wall of the spline shaft 4. At the same time, the torsion spring 8 undergoes elastic deformation, causing the other end of the U-shaped metal rod 6 to disengage from the shift groove 9 on the outer wall of the spline sleeve 2. At this time, the steering wheel 5 can be pushed or pulled, causing the spline shaft 4 to slide along the inner wall of the spline sleeve 2 to achieve extension and retraction. After adjustment, release the U-shaped metal rod 6, the torsion spring 8 resets, and pushes the convex column 7 and the U-shaped metal rod 6 back. One end of the U-shaped metal rod 6 is re-engaged into the shift groove 9 to complete the fixation.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A steering structure for an electric children's vehicle, comprising a steering shaft (1), characterized in that, One end of the steering shaft (1) is fixedly connected to a spline sleeve (2), and a hollow spline shaft (4) is slidably connected to the inner wall of the spline sleeve (2). One end of the spline shaft (4) is fixedly connected to a steering wheel (5). A U-shaped metal rod (6) is placed inside the spline shaft (4). A convex column (7) is fixedly sleeved on the outer wall of the U-shaped metal rod (6). An annular groove is opened on the inner wall of the spline shaft (4). The inner wall of the annular groove is rotatably connected to the outer wall of the convex column (7). A torsion spring (8) is sleeved on the outer wall of the U-shaped metal rod (6). A shift groove (9) is opened on the outer wall of the spline sleeve (2). Two arc-shaped grooves are opened on the outer wall of the spline shaft (4). The inner walls of the two arc-shaped grooves are slidably connected to the outer walls of the two ends of the U-shaped metal rod (6). One end of the U-shaped metal rod (6) is located inside the shift groove (9). A steering assembly is provided at one end of the steering shaft (1).

2. The steering structure of an electrically driven stroller according to claim 1, wherein The steering assembly includes two ball joints (14), and two steering blades (11) are fixedly connected to the outer wall of the steering shaft (1). One end of each ball joint (14) is fixedly connected to the outer wall of one of the steering blades (11), and the other end of each ball joint (14) is fixedly connected to a wheel (15).

3. The steering structure of an electric children's vehicle according to claim 1, characterized in that, A rubber sleeve (3) is fixedly connected to the outer wall of the spline shaft (4).

4. The steering structure of an electric children's vehicle according to claim 1, characterized in that, The outer wall of the steering shaft (1) is fixedly fitted with a roller bearing (10).

5. The steering structure of an electric children's vehicle according to claim 1, characterized in that, The outer wall of the steering shaft (1) is fixedly fitted with a spherical bearing (12), and the outer wall of the spherical bearing (12) is fixedly connected with an I-shaped mounting bracket (13).

6. The steering structure of an electric children's vehicle according to claim 1, characterized in that, One end of the torsion spring (8) is fixedly connected to the outer wall of the convex column (7), and the other end of the torsion spring (8) is fixedly connected to the inner wall of the spline shaft (4).

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