Gear box transmission clutch structure of small baby carriage

Abstract

The utility model relates to a gearbox transmission clutch structure of a small baby carriage, which comprises a gear upper cover and a gear lower cover, an accommodating cavity is formed between the gear upper cover and the gear lower cover, and a gear transmission mechanism is assembled in the accommodating cavity; a limiting groove is formed outside the gear upper cover, a driving motor is assembled in the limiting groove, a driving shaft of the driving motor penetrates through the gear upper cover to be connected with a motor gear, and the motor gear is connected with a gear transmission mechanism; the gear transmission mechanism comprises a first gear and a second gear which are meshed with each other; the second large gear is arranged close to the inner wall of the gear box, all gears and parts are reasonably arranged, the overall size is reduced, space is saved, the design requirement of a small electric baby carriage is better met, and miniaturization and light weight of the whole baby carriage are facilitated.

Description

Technical Field

[0001] This utility model belongs to the technical field of children's vehicle accessories, specifically relating to a gearbox transmission clutch structure for a small children's vehicle. Background Technology

[0002] Children's vehicles are a major category of children's toys, including five main types: children's bicycles, strollers, baby walkers, tricycles, and electric children's vehicles. With scientific development and the progress of the times, more and more electric children's vehicles are entering people's homes. Electric children's vehicles are a relatively new type of children's toy, similar to small cars. Children can drive them themselves or interact with their parents. They are driven by motors and are safe to operate, making them realistic electric toy cars. They not only increase children's enjoyment but also bring certain benefits to children's intellectual development and enhance their brain development.

[0003] Currently, the gearbox structures of existing electric children's vehicles on the market are mainly designed for driving large children's vehicles such as electric cars, electric motorcycles, electric engineering vehicles, and plush toy electric cars. However, there are no suitable gearbox structures for small electric children's vehicles (such as twist cars and bumper cars), which are small in size and require high speed and torque. Moreover, many existing gearbox structures for electric children's vehicles have problems such as high noise and easy breakage of transmission gears during operation.

[0004] Therefore, improvements are needed to address the aforementioned technical issues. Utility Model Content

[0005] The present invention aims to overcome the defects in the prior art and provide a gearbox transmission clutch structure for a small children's vehicle that is ingeniously designed, simple in structure, and has the functions of reducing noise and current.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a gearbox transmission clutch structure for a small children's vehicle, including an upper gear cover and a lower gear cover, with a receiving cavity formed between the upper gear cover and the lower gear cover, and a gear transmission mechanism assembled in the receiving cavity; a limiting groove is formed on the outside of the upper gear cover, and a drive motor is assembled in the limiting groove; the drive shaft of the drive motor passes through the upper gear cover and connects to a motor gear, and the motor gear connects to the gear transmission mechanism; the gear transmission mechanism includes a first gear and a second gear that mesh with each other; a first connecting shaft and a positioning cylinder are arranged inside the upper gear cover; the first gear is movably sleeved on the first connecting shaft, and the second gear is movably sleeved on the positioning cylinder; the first gear meshes with the motor gear; the second gear is connected to a separation mechanism; the separation mechanism is equipped with a connecting part that extends out of the lower gear cover for connection with the children's vehicle wheel assembly.

[0007] In a preferred embodiment of this utility model, the first gear includes a first large gear and a first small gear; the second gear includes a second large gear and an output seat; the first large gear meshes with the motor gear, the first small gear meshes with the second large gear, and the separation mechanism is assembled on the output seat.

[0008] In a preferred embodiment of this utility model, a bearing limiting groove is formed inside the second large gear, and a second bearing is assembled inside the bearing limiting groove; the second bearing is sleeved on the positioning cylinder.

[0009] In a preferred embodiment of this invention, the diameter of the second large gear is larger than the diameter of the first large gear; the second large gear of the second gear is located close to the inner wall of the gearbox.

[0010] In a preferred embodiment of this utility model, a first bearing is fixedly provided inside both the first large gear and the first small gear; the first gear is movably sleeved on the first connecting shaft through the first bearing.

[0011] In a preferred embodiment of this utility model, the connecting part includes a connecting cylinder and a connecting member fixed on the connecting cylinder; the connecting cylinder is fitted onto the separation mechanism, and the side wall of the connecting member is provided with concave and convex limiting parts along the circumferential direction for connecting the children's vehicle wheels.

[0012] In a preferred embodiment of this utility model, the separation mechanism includes a positioning ring, a baffle plate, and two clutch magnets; one side of the positioning ring is sleeved on the output seat, and the other side of the positioning ring is connected to the baffle plate. Notches are formed on both sides of the positioning ring, and the clutch magnets are installed in the notches; a limiting groove is formed inside the connecting cylinder, and the connecting cylinder is fitted around the positioning ring. The limiting groove is adapted to and connected to the clutch magnets; the connecting cylinder, the baffle plate, and the second gear confine the clutch magnets within the notches.

[0013] In a preferred embodiment of this invention, the notch is symmetrically arranged along the central axis of the positioning ring.

[0014] In a preferred embodiment of this utility model, a limiting cylinder is fixedly provided at the end of the baffle away from the positioning ring. Multiple limiting grooves are formed inside the limiting cylinder. Correspondingly, multiple limiting protrusions that are adapted to the limiting grooves are arranged on the outer side of the top of the positioning cylinder. When the limiting cylinder is connected to the positioning cylinder, the limiting grooves are embedded in the limiting protrusions.

[0015] In a preferred embodiment of this utility model, the meshing teeth on the motor gear are helical teeth, and correspondingly, the first large gear on the first gear is also a helical gear.

[0016] The beneficial effects of this utility model are:

[0017] 1. The present invention has a compact structure: by placing the second large gear close to the inner wall of the gearbox, the gears and components are arranged in a reasonable manner, reducing the overall volume, saving space, and making it more suitable for the design requirements of small electric children's vehicles, which is conducive to the miniaturization and lightweighting of the children's vehicle as a whole.

[0018] 2. This utility model has high transmission efficiency: the two-stage reduction transmission structure (the first large gear meshes with the motor gear, and the first small gear meshes with the second large gear) can effectively reduce the speed and increase the torque; the first gear and the second gear are respectively connected to the connecting shaft and the positioning cylinder through bearings, which reduces friction during the transmission process and improves the transmission efficiency.

[0019] 3. This utility model has strong stability: the bearing limiting groove in the second large gear cooperates with the second bearing, the first bearing is fixed in the first large gear and the first small gear, and the baffle and the positioning cylinder are connected through the limiting groove and the limiting protrusion, all of which enhance the stability of the gear transmission process and ensure the reliability of power transmission.

[0020] 4. This utility model has low noise: The motor gear and the first large gear adopt a helical gear design. By utilizing the characteristics of helical gears, such as large overlap, strong load-bearing capacity and low noise, the noise generated during transmission is effectively reduced, creating a quiet riding environment for children.

[0021] 5. This utility model is easy to assemble and maintain: the structure of each component is reasonably designed and the connection method is simple. For example, the connection part cooperates with the limiting slot and clutch magnet of the separation mechanism, which is convenient for disassembly and installation. The separation mechanism can easily realize power separation, making operation convenient during maintenance or repair and reducing assembly and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the gearbox structure according to an embodiment of the present utility model;

[0023] Figure 2 This is an exploded view of the gearbox structure according to an embodiment of the present utility model;

[0024] Figure 3 This is an exploded view of the first gear and the first bearing in an embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the first gear and the first bearing in an embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the second gear in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the gearbox structure without the lower gear cover according to an embodiment of the present invention;

[0028] Figure 7This is a schematic diagram of the connection part in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the baffle in an embodiment of this utility model;

[0030] Figure 9 This is a schematic diagram of the gearbox structure of this utility model embodiment with the gear cover and connecting part removed;

[0031] The attached figures are labeled as follows: 1. Gear upper cover; 2. Gear lower cover; 3. Drive motor; 4. Gear transmission mechanism; 5. First gear; 5-1. First large gear; 5-2. First small gear; 6. Second gear; 6-1. Second large gear; 6-2. Output seat; 6-3. Bearing limiting groove; 7. Separation mechanism; 8. Connecting part; 10. Limiting groove; 11. First connecting shaft; 12. Positioning cylinder; 13. Limiting cylinder; 14. Limiting groove; 15. Limiting protrusion; 30. Drive shaft; 31. Motor gear; 50. First bearing; 60. Second bearing; 70. Positioning ring; 71. Baffle; 72. Clutch magnet; 73. Notch; 80. Connecting cylinder; 81. Connecting piece; 82. Limiting part; 83. Limiting slot. Detailed Implementation

[0032] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] Example:

[0034] like Figure 1 , Figure 2 , Figure 6 and Figure 9 As shown, this mainly targets small children's vehicles, such as twist cars and bumper cars. These vehicles are characterized by small wheels and high speed. Specifically, a gearbox transmission clutch structure for a small children's vehicle includes an upper gear cover 1 and a lower gear cover 2. A receiving cavity is formed between the upper gear cover 1 and the lower gear cover 2, and a gear transmission mechanism 4 is assembled in the receiving cavity. A limiting groove 10 is formed on the outside of the upper gear cover 1, and a drive motor 3 is assembled in the limiting groove 10. The drive shaft 30 of the drive motor 3 passes through the upper gear cover 1 and connects to a motor gear 31. The motor gear 31 is connected to the gear transmission mechanism 4. The gear transmission mechanism 4 includes a first gear 5 and a second gear 6 that mesh with each other. The cover 1 is provided with a first connecting shaft 11 and a positioning cylinder 12; a first gear 5 is movably sleeved on the first connecting shaft 11, and a second gear 6 is movably sleeved on the positioning cylinder 12; the first gear 5 meshes with the motor gear 31; the second gear 6 is connected to a separation mechanism 7; the separation mechanism 7 is equipped with a connecting part 8 that extends out of the gear cover 2 for connecting with the children's vehicle wheel assembly; the structure of each component of this utility model is reasonably designed and the connection method is simple. For example, the connecting part cooperates with the limiting slot and clutch magnet of the separation mechanism, which is convenient for disassembly and installation; the separation mechanism facilitates power separation, making operation convenient during maintenance or repair, and reducing assembly and maintenance costs.

[0035] like Figures 3-5 As shown, the first gear 5 includes a first large gear 5-1 and a first small gear 5-2; the second gear 6 includes a second large gear 6-1 and an output seat 6-2; the first large gear 5-1 meshes with the motor gear 31, and the first small gear 5-2 meshes with the second large gear 6-1, forming a two-stage reduction transmission structure, which effectively reduces the speed and increases the torque; the separation mechanism 7 is mounted on the output seat 6-2 to realize the power transmission and separation functions.

[0036] In this embodiment, the first large gear 5-1, the first small gear 5-2, and the second large gear 6-1 are all spur gears.

[0037] This utility model has a simple structure. Through a two-stage reduction transmission structure (the first large gear meshes with the motor gear, and the first small gear meshes with the second large gear), the rotational speed can be effectively reduced and the torque increased. The first gear and the second gear are respectively connected to the connecting shaft and the positioning cylinder through bearings, which reduces friction during the transmission process and improves the transmission efficiency.

[0038] like Figures 4-5 As shown, to improve transmission efficiency and stability, a bearing limiting groove 6-3 is formed inside the second large gear 6-1. A second bearing 60 is assembled inside the bearing limiting groove 6-3 and is sleeved on the positioning cylinder 12, enabling the second gear 6 to rotate smoothly. Meanwhile, the diameter of the second large gear 6-1 is larger than the diameter of the first large gear 5-1, and the second large gear 6-1 is positioned close to the inner wall of the gearbox. This structural design makes the overall structure of the gearbox more compact.

[0039] like Figure 3 As shown, a first bearing 50 is fixedly installed inside both the first large gear 5-1 and the first small gear 5-2; the first gear 5 is movably sleeved on the first connecting shaft 11 through the first bearing 50; this further improves transmission efficiency and stability, and reduces friction and noise.

[0040] like Figure 6 and Figure 7 As shown, the connecting part 8 includes a connecting cylinder 80 and a connecting member 81 fixed on the connecting cylinder 80; the connecting cylinder 80 is fitted onto the separating mechanism 7, and the side wall of the connecting member 81 is provided with a concave-convex limiting part 82 along the circumferential direction for connecting the stroller wheel; it is used to reliably connect with the stroller wheel to ensure that the power can be effectively transmitted to the wheel.

[0041] like Figure 2 , Figure 7 and Figure 9As shown, the separation mechanism 7 includes a positioning ring 70, a baffle 71, and two clutch magnets 72. One side of the positioning ring 70 is sleeved on the output seat 6-2, and the other side of the positioning ring 70 is connected to the baffle 71. Notches 73 are formed on both sides of the positioning ring 70, and the clutch magnets 72 are installed in the notches 73. A limiting groove 83 is formed in the connecting cylinder 80. The connecting cylinder 80 is fitted around the positioning ring 70, and the limiting groove 83 is adapted to and connected to the clutch magnets 72. The connecting cylinder 80, the baffle 71, and the second gear 6 limit the clutch magnets 72 within the notches 73.

[0042] When the drive motor 3 is activated, the clutch magnet 72, driven by the gears at each stage, moves within the notch 73 area under centrifugal force. The clutch magnet 72 moves to the edge of the positioning ring 70, partially embedding into the limiting groove 83, thus locking the connecting piece 81 with the positioning ring 70. This drives the connecting cylinder 80 to rotate, thereby driving the wheel to rotate. When the drive motor 3 stops, pulling the stroller causes the wheel to rotate, which in turn drives the connecting cylinder 80 to rotate. During the transmission process of the connecting cylinder 80, displacement occurs between the limiting groove 83 and the positioning ring 70, causing the clutch magnet 72 to be squeezed out of the limiting groove 83 and enter the notch 73 area. This separates the connecting cylinder 80 from the positioning ring 70, allowing the connecting cylinder 80 to rotate freely. The connecting cylinder 80 is also separated from the gears at each stage and the drive motor 3, thereby reducing wheel resistance and wear on the gears at each stage and the drive motor 3. This effectively extends the service life of the stroller, reduces user costs, and facilitates the promotion and application of electric strollers in the market.

[0043] The separation mechanism 7 in this embodiment acts as a drive when energized and rotates freely when de-energized.

[0044] The notch 73 is symmetrically arranged along the central axis of the positioning ring 70, that is, one notch 73 is symmetrically arranged on both sides of the central axis of the positioning ring 70, and the two parts of the notch 73 are symmetrical along the central axis of the positioning ring 70. This implementation can ensure that the clutch magnet 72 moves within the notch 73 and reduce the resistance of the clutch magnet 72 during the movement.

[0045] like Figure 2 and Figure 8 As shown, a limiting cylinder 13 is fixed at the end of the baffle 71 away from the positioning ring 70. Multiple limiting grooves 14 are formed inside the limiting cylinder 13. Correspondingly, multiple limiting protrusions 15, which are adapted to the limiting grooves 14, are arranged on the outer side of the top of the positioning cylinder 12. When the limiting cylinder 13 is connected to the positioning cylinder 12, the limiting grooves 14 are embedded within the limiting protrusions 15. This connection between the limiting cylinder 13 and the positioning cylinder 12 further enhances the stability and reliability of the structure.

[0046] To reduce transmission noise and improve transmission smoothness, the meshing teeth on the motor gear 31 are helical teeth, and correspondingly, the first large gear 5-1 on the first gear 5 is also a helical gear. Helical gear transmission has advantages such as high overlap ratio, strong load-bearing capacity, and low noise.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0048] Although this document uses numerous reference numerals from the accompanying drawings, such as gear upper cover 1, gear lower cover 2, drive motor 3, gear transmission mechanism 4, first gear 5, first large gear 5-1, first small gear 5-2, second gear 6, second large gear 6-1, output seat 6-2, bearing limiting groove 6-3, separation mechanism 7, connecting part 8, limiting groove 10, first connecting shaft 11, positioning cylinder 12, limiting cylinder 13, limiting groove 14, limiting protrusion 15, drive shaft 30, motor gear 31, first bearing 50, second bearing 60, positioning ring 70, baffle 71, clutch magnet 72, notch 73, connecting cylinder 80, connecting piece 81, limiting part 82, limiting slot 83, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A gearbox transmission clutch structure for a small children's vehicle, characterized in that: The device includes an upper gear cover (1) and a lower gear cover (2), with a receiving cavity formed between the upper gear cover (1) and the lower gear cover (2), and a gear transmission mechanism (4) is assembled in the receiving cavity; a limiting groove (10) is formed on the outside of the upper gear cover (1), and a drive motor (3) is assembled in the limiting groove (10). The drive shaft (30) of the drive motor (3) passes through the upper gear cover (1) and connects to a motor gear (31), and the motor gear (31) connects to the gear transmission mechanism (4); the gear transmission mechanism (4) includes mutually meshing... The gear has a first gear (5) and a second gear (6); a first connecting shaft (11) and a positioning cylinder (12) are arranged inside the gear cover (1); the first gear (5) is movably sleeved on the first connecting shaft (11), and the second gear (6) is movably sleeved on the positioning cylinder (12); the first gear (5) meshes with the motor gear (31); the second gear (6) is connected to a separation mechanism (7); the separation mechanism (7) is equipped with a connecting part (8) that extends out of the gear cover (2) for connecting with the children's vehicle wheel assembly.

2. The gearbox transmission clutch structure for a small children's vehicle according to claim 1, characterized in that: The first gear (5) includes a first large gear (5-1) and a first small gear (5-2); the second gear (6) includes a second large gear (6-1) and an output seat (6-2); the first large gear (5-1) meshes with the motor gear (31), the first small gear (5-2) meshes with the second large gear (6-1), and the separation mechanism (7) is mounted on the output seat (6-2).

3. The gearbox transmission clutch structure for a small children's vehicle according to claim 2, characterized in that: The second large gear (6-1) has a bearing limiting groove (6-3) formed inside, and a second bearing (60) is assembled inside the bearing limiting groove (6-3); the second bearing (60) is sleeved on the positioning cylinder (12).

4. The gearbox transmission clutch structure for a small children's vehicle according to claim 3, characterized in that: The diameter of the second large gear (6-1) is larger than the diameter of the first large gear (5-1); the second large gear (6-1) of the second gear (6) is located close to the inner wall of the gearbox.

5. The gearbox transmission clutch structure for a small children's vehicle according to claim 2, characterized in that: The first large gear (5-1) and the first small gear (5-2) are both fixed with a first bearing (50); the first gear (5) is movably sleeved on the first connecting shaft (11) through the first bearing (50).

6. The gearbox transmission clutch structure for a small children's vehicle according to claim 1, characterized in that: The connecting part (8) includes a connecting cylinder (80) and a connector (81) fixed on the connecting cylinder (80); the connecting cylinder (80) is fitted onto the separating mechanism (7), and the side wall of the connector (81) is provided with a concave-convex limiting part (82) for connecting the children's vehicle wheels.

7. The gearbox transmission clutch structure for a small children's vehicle according to claim 6, characterized in that: The separation mechanism (7) includes a positioning ring (70), a baffle (71), and two clutch magnets (72); one side of the positioning ring (70) is sleeved on the output seat (6-2), and the other side of the positioning ring (70) is connected to the baffle (71). Notches (73) are formed on both sides of the positioning ring (70), and the clutch magnets (72) are installed in the notches (73); a limiting groove (83) is formed in the connecting cylinder (80), and the connecting cylinder (80) is fitted around the positioning ring (70). The limiting groove (83) is adapted to the clutch magnets (72); the connecting cylinder (80), the baffle (71), and the second gear (6) limit the clutch magnets (72) in the notches (73).

8. The gearbox transmission clutch structure for a small children's vehicle according to claim 7, characterized in that: The notch (73) is symmetrically arranged along the central axis of the positioning ring (70).

9. The gearbox transmission clutch structure for a small children's vehicle according to claim 7, characterized in that: The end of the baffle (71) away from the positioning ring (70) is fixed with a limiting cylinder (13). Multiple limiting grooves (14) are formed inside the limiting cylinder (13). Correspondingly, multiple limiting protrusions (15) that are adapted to the limiting grooves (14) are arranged on the outer side of the top of the positioning cylinder (12). When the limiting cylinder (13) is connected to the positioning cylinder (12), the limiting grooves (14) are embedded in the limiting protrusions (15).

10. The gearbox transmission clutch structure for a small children's vehicle according to claim 1, characterized in that: The meshing teeth on the motor gear (31) are helical teeth, and correspondingly, the first large gear (5-1) on the first gear (5) is also a helical gear.

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