A brushless wheel hub motor mounting structure for a toy vehicle
Patent Information
- Application Number
- CN202522306845.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-31
AI Technical Summary
1.电机与车轮连接稳固性不足：现有安装方式多依赖单一塑料卡扣或单组螺栓实现电机与车轮内圈的连接，玩具车在前进、后退或转向过程中，车轮内圈的塑料部件易因受力发生形变，导致电机与车轮的连接间隙逐渐增大，长期使用后甚至出现电机整体从车轮内圈脱落的风险；
本实用新型中，通过第一稳固结构与第二稳固结构的协同传力设计，针对性解决了现有安装结构传力不可靠、轮子易卡顿的问题，同时契合实现无刷轮毂电机与玩具车驱动轮稳固连接的核心需求。第一稳固结构借助电机本体外周与安装腔内壁的凸起部分、凹陷部分精准嵌合，直接形成电机本体与轮毂组件的转动力传递一体结构；第二稳固结构通过第二稳固组件的卡合结构（带凸起与凹陷）与电机盖体刹车固定柱嵌合，进一步实现电机盖体与第一轮毂组件的转动力传递，确保电机外转子转动时能同步带动轮毂组件整体转动，完全适配玩具车高频启停、轻度碰撞的场景，避免现有结构“传力断层”导致的驱动不稳定问题。
Smart Images
Figure CN224911746U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of toy car accessories, specifically relating to a brushless hub motor mounting structure for toy cars. Background Technology
[0002] In the field of toy car component technology, brushless hub motors, with their advantages of low operating noise and long service life, have gradually replaced traditional brushed motors and become the core power component of toy car drive wheels. To prevent damage to the motor from dust and moisture, the industry generally adopts the installation approach of embedding the brushless hub motor inside the toy car drive wheel. This design also references existing wheel technology for children's passenger vehicles. In some existing wheel solutions for children's passenger vehicles, the brushless motor has already been embedded inside the wheel, and the structural strength has been improved by using metal fixing components, which has solved the problem of easy damage to external motors to some extent.
[0003] However, for the specific use cases of toy cars (such as high-frequency start-stop, minor collisions, and the use of lightweight plastic materials for the body and wheel hubs), the existing brushless wheel hub motor mounting structure still has significant drawbacks: 1. Insufficient stability of the connection between the motor and the wheel: Existing installation methods mostly rely on a single plastic clip or a single set of bolts to connect the motor and the inner ring of the wheel. When the toy car moves forward, backward or turns, the plastic parts of the inner ring of the wheel are prone to deformation due to stress, which causes the connection gap between the motor and the wheel to gradually increase. After long-term use, there is even a risk that the motor will fall off the inner ring of the wheel. 2. Lack of effective anti-rotation fixation for the motor's central shaft: When a brushless hub motor is running, it relies on the outer rotor to drive the wheel to rotate synchronously, while the motor's central shaft needs to remain fixed to ensure transmission stability. However, the existing mounting structure only uses a simple plastic sleeve to limit the central shaft, which cannot effectively restrict the circumferential rotation of the central shaft. During operation, the central shaft is prone to rotating synchronously with the outer rotor, which not only reduces transmission efficiency but also aggravates the wear between the central shaft and the plastic sleeve, further shortening the service life of the mounting structure. 3. Poor adaptability of existing solutions: Existing wheel motor installation solutions for children's vehicles mostly use metal wheels, and the motor fixing structure does not take into account the lightweight (mostly plastic wheel hubs) and high-frequency motion characteristics of toy cars. The simple combination of "built-in motor + metal fixing parts" cannot solve the problem of motor loosening caused by deformation of plastic wheel hubs in toy cars, and is difficult to adapt to the installation requirements of brushless wheel hub motors for toy cars.
[0004] In summary, the existing brushless hub motor mounting structure still faces technical challenges in toy car scenarios, such as "unstable connection, difficulty in fixing the central shaft, and poor scenario adaptability." There is an urgent need for a targeted mounting structure design to overcome these shortcomings. Utility Model Content
[0005] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a brushless hub motor mounting structure for toy cars, which is particularly suitable for the assembly of toy car drive wheels and brushless hub motors. It aims to achieve a stable connection between the brushless hub motor and the toy car drive wheel through a specific mounting structure, solve the problem of easy loosening and falling off of existing brushless hub motors in toy cars after installation, and adapt to the lightweight and low-noise usage requirements of toy cars.
[0006] To achieve the above objectives, this utility model provides a brushless hub motor mounting structure for toy cars, comprising: A wheel hub assembly, comprising at least a first wheel hub assembly and a second wheel hub assembly, wherein the first wheel hub assembly and the second wheel hub assembly are fixedly connected after being covered; the first wheel hub assembly and the second wheel hub assembly have mounting cavities for accommodating a brushless wheel hub motor; A brushless hub motor, comprising a motor body, a motor cover and a motor central shaft, wherein the motor central shaft is provided with a limiting anti-rotation structure at both ends; The first stabilizing structure is disposed between the inner wall of the mounting cavity of the motor body and the hub assembly. The first stabilizing structure includes a protruding part and a recessed part on the inner wall of the mounting cavity and a protruding part and a recessed part on the outer periphery of the motor body, which is used to realize the transmission of rotational power between the motor body and the hub assembly. The second stabilizing structure is disposed between the first wheel hub assembly and the motor cover. The second stabilizing structure includes a hollow second stabilizing component, and the outer periphery of the second stabilizing component is provided with a locking structure for realizing the transmission of rotational power between the motor cover and the first wheel hub assembly.
[0007] Furthermore, the second wheel assembly is provided with an outer wheel hub fixing post and an inner wheel hub fixing post, and the first wheel assembly is provided with an outer ring hole and an inner ring hole at the positions corresponding to the outer wheel hub fixing post and the inner wheel hub fixing post, respectively; after the first wheel assembly and the second wheel assembly are fitted together, bolts are passed through the outer ring hole and the inner ring hole of the first wheel assembly and enter the outer wheel hub fixing post and the inner wheel hub fixing post of the second wheel assembly, so as to achieve a fixed connection between the two.
[0008] Furthermore, in the first stabilizing structure, the protruding portion of the outer periphery of the motor body is fitted into the recessed portion of the inner wall of the mounting cavity, and the recessed portion of the outer periphery of the motor body is fitted into the protruding portion of the inner wall of the mounting cavity, so that the motor body and the hub assembly form an integrated structure for power transmission.
[0009] Furthermore, the motor body is also provided with a second reinforcing rib, the second reinforcing rib having a through hole, and the inner wall of the mounting cavity of the second hub assembly is provided with a motor fixing post; the screw passes through the through hole and is driven into the motor fixing post to fix the motor body and the second hub assembly as one unit, while also helping to limit the displacement of the motor body in the mounting cavity.
[0010] Furthermore, the motor body is also provided with a first reinforcing rib, and the first reinforcing rib has a screw hole; the bolt passes through the screw hole and covers the end of the motor body to form an integral part, so that the motor cover rotates synchronously with the motor body, adapting to the power transmission of the first stabilizing structure and the second stabilizing structure.
[0011] Furthermore, the second stabilizing component is fixed to the first wheel hub assembly by bolts, forming an integral part with the first wheel hub assembly; the engaging structure of the second stabilizing component has a protruding part and a recessed part, and a plurality of brake fixing posts are arranged around the outer periphery of the motor cover. The outer periphery of the brake fixing posts is adapted to the protruding part and the recessed part of the engaging structure, and the engaging structure is engaged with the brake fixing posts; the engaging structure realizes the transmission of rotational power between the motor cover and the first wheel hub assembly through engagement, and at the same time helps to limit the displacement of the motor cover in the mounting cavity.
[0012] Furthermore, brake pads are installed on the brake mounting post.
[0013] Furthermore, the limiting and anti-rotation structure of the motor central shaft includes: both ends of the motor central shaft are set as square structures; the limiting and anti-rotation structure also includes a square tube, the inner hole shape of which is adapted to the square structure of the motor central shaft, and the square tube is sleeved outside the square structure of the motor central shaft to restrict the circumferential rotation of the motor central shaft.
[0014] The present invention, by adopting the above technical solution, has at least the following beneficial effects: In this invention, the coordinated force transmission design of the first and second stabilizing structures effectively solves the problems of unreliable force transmission and wheel jamming in existing installation structures, while also meeting the core requirement of a stable connection between the brushless hub motor and the toy car's drive wheel. The first stabilizing structure precisely fits the protruding and recessed parts of the outer periphery of the motor body with the inner wall of the mounting cavity, directly forming an integrated structure for the transmission of rotational power between the motor body and the hub assembly. The second stabilizing structure, through the engaging structure (with protrusions and recesses) of the second stabilizing component, engages with the brake fixing post of the motor cover, further realizing the transmission of rotational power between the motor cover and the first hub assembly. This ensures that when the outer rotor of the motor rotates, it can synchronously drive the entire hub assembly to rotate, fully adapting to the high-frequency start-stop and light collision scenarios of toy cars, and avoiding the drive instability problem caused by the "force transmission discontinuity" of existing structures.
[0015] This invention solves the problems of insufficient stability in the connection between the motor and the wheel, and easy detachment after long-term use, through a multi-stabilization design combining interlocking positioning and screw fixing, thus achieving the goal of "preventing the motor from loosening and falling off after installation." The protrusions and recesses of the first stabilizing structure first radially position the motor body to prevent the motor from shifting within the mounting cavity; then, the screws of the second reinforcing rib of the motor body are driven into the motor fixing post of the second wheel hub assembly, fixing the two together and helping to limit axial displacement; at the same time, the motor cover is fixed to the motor body by the bolts of the first reinforcing rib, forming a firm connection between the motor and the wheel hub assembly, completely avoiding the problem of motor detachment caused by deformation of plastic parts due to existing single buckle or bolt fixing, and significantly improving the service life of the installation structure.
[0016] In this invention, the square structure of the motor's central shaft, combined with the fitting of a suitable square tube, effectively solves the problem in the prior art where the motor's central shaft lacks effective anti-rotation fixation and is prone to rotation with the external rotor, thus meeting the requirement of "ensuring transmission stability" in the invention's objective. The two ends of the motor's central shaft are designed with square structures, and the inner hole of the square tube is fitted to and sleeved onto the outside of the square structure, directly restricting the circumferential rotation of the central shaft. This ensures that the central shaft remains fixed during motor operation, avoiding transmission efficiency loss and reducing friction and wear between the shaft and surrounding components. Furthermore, this design does not rely on the metal fixing rods found in existing children's vehicle solutions, better aligning with the lightweight design characteristics of toy cars and solving the defect of "poor scene adaptability" in existing related solutions.
[0017] This invention, through the structural design of the motor's built-in mounting cavity and the reserved assembly of the brake fixing posts, takes into account the requirements of low noise and expandability for toy cars, while also overcoming the shortcomings of existing solutions that are limited in function and require additional modifications. The motor is built into the mounting cavity of the wheel hub assembly, which effectively reduces the operating noise of the toy car and improves safety compared to an external motor. The brake fixing posts surrounding the motor cover provide a base for the second stabilizing structure and can also expand the braking function by installing brake pads, avoiding the problem of existing mounting structures requiring additional modifications to adapt to braking, further improving the practicality and scenario adaptability of the structure. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0019] Figure 1 This is a schematic diagram of the brushless hub motor mounting structure of this utility model installed on a motorcycle; Figure 2 This is a schematic diagram of the brushless hub motor mounting structure of this utility model installed on the rear wheel; Figure 3 This is a schematic diagram of the structure of the present invention with the mounting cavity portion; Figure 4 This is a schematic diagram of one side of the brushless hub motor mounting structure of this utility model; Figure 5 This is a schematic diagram of the other side of the brushless hub motor mounting structure of this utility model; Figure 6 This is a schematic diagram of the utility model with brake pads. Figure 1 ; Figure 7 This is a schematic diagram of the utility model with brake pads. Figure 2 ; Figure 8 This is a schematic diagram of the utility model with a motor installed. Figure 1 ; Figure 9 This is a schematic diagram of the utility model with a motor installed. Figure 2 ; Figure 10 This is a schematic diagram of the motor structure of this utility model; Figure 11 This is a schematic diagram of the second wheel hub assembly of this utility model. Figure 1 ; Figure 12 This is a schematic diagram of the second wheel hub assembly of this utility model. Figure 2 .
[0020] In the diagram: 1. First hub assembly; 2. Second hub assembly; 3. Mounting cavity; 4. Motor body; 5. Motor cover; 6. Motor central shaft; 7. Protruding part; 8. Recessed part; 9. Second stabilizing component; 10. Outer ring hub fixing post; 11. Inner ring hub fixing post; 12. Outer ring hole; 13. Inner ring hole; 14. Square tube; 15. First reinforcing rib; 16. Second reinforcing rib; 17. Brake fixing post; 18. Brake pad; 19. Motor fixing post. Detailed Implementation
[0021] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.
[0022] Please see Figures 1 to 12 As shown, this embodiment provides a brushless hub motor mounting structure for toy cars, including: The wheel hub assembly includes at least a first wheel hub assembly 1 and a second wheel hub assembly 2, wherein the first wheel hub assembly 1 and the second wheel hub assembly 2 are fixedly connected after being covered; the first wheel hub assembly 1 and the second wheel hub assembly 2 have mounting cavities 3 for accommodating a brushless wheel hub motor. A brushless hub motor, comprising a motor body 4, a motor cover 5, and a motor central shaft 6, wherein the motor central shaft 6 is provided with a limiting anti-rotation structure at both ends; The first stabilizing structure is disposed between the inner wall of the motor body 4 and the mounting cavity 3 of the hub assembly. The first stabilizing structure includes a protruding part 7 and a recessed part 8 on the inner wall of the mounting cavity 3 and a protruding part 7 and a recessed part 8 on the outer periphery of the motor body 4, which are used to realize the transmission of rotational power between the motor body 4 and the hub assembly. The second stabilizing structure is disposed between the first hub assembly 1 and the motor cover 5. The second stabilizing structure includes a hollow second stabilizing component 9. The outer periphery of the second stabilizing component 9 is provided with a locking structure to realize the transmission of rotational power between the motor cover 5 and the first hub assembly 1.
[0023] In one embodiment, the second wheel hub assembly 2 is provided with an outer ring wheel hub fixing post 10 and an inner ring wheel hub fixing post 11. The first wheel hub assembly 1 is provided with an outer ring hole 12 and an inner ring hole 13 at the positions corresponding to the outer ring wheel hub fixing post 10 and the inner ring wheel hub fixing post 11, respectively. After the first wheel hub assembly 1 and the second wheel hub assembly 2 are closed, bolts are passed through the outer ring hole 12 and the inner ring hole 13 of the first wheel hub assembly 1 and enter the outer ring wheel hub fixing post 10 and the inner ring wheel hub fixing post 11 of the second wheel hub assembly 2 to achieve a fixed connection between the two.
[0024] In one embodiment, in the first stabilizing structure, the protruding portion 7 on the outer periphery of the motor body 4 is fitted into the recessed portion 8 on the inner wall of the mounting cavity 3, and the recessed portion 8 on the outer periphery of the motor body 4 is fitted into the protruding portion 7 on the inner wall of the mounting cavity 3, so that the motor body 4 and the hub assembly form an integrated structure for power transmission.
[0025] As one implementation method, the motor body 4 in this embodiment is further provided with a second reinforcing rib 16, the second reinforcing rib 16 is provided with a through hole, and the inner wall of the mounting cavity 3 of the second hub assembly 2 is provided with a motor fixing post; the screw passes through the through hole and is driven into the motor fixing post to fix the motor body 4 and the second hub assembly 2 into one piece, while also helping to limit the displacement of the motor body 4 in the mounting cavity 3.
[0026] As one implementation method, the motor body 4 in this embodiment is further provided with a first reinforcing rib 15, and the first reinforcing rib 15 has a screw hole; the bolt passes through the screw hole and covers the motor cover 5 on the end of the motor body 4 and forms an integral part, so that the motor cover 5 rotates synchronously with the motor body 4, adapting to the rotational power transmission of the first stabilizing structure and the second stabilizing structure.
[0027] In one embodiment, the second stabilizing component 9 is fixed to the first wheel hub assembly 1 by bolts, forming an integral part with the first wheel hub assembly 1; the engaging structure of the second stabilizing component 9 has a protruding portion 7 and a recessed portion 8, and a plurality of brake fixing posts 17 are arranged around the outer periphery of the motor cover 5. The outer periphery of the brake fixing posts 17 is adapted to the protruding portion 7 and the recessed portion 8 of the engaging structure, and the engaging structure is engaged with the brake fixing posts 17; the engaging structure realizes the transmission of rotational power between the motor cover 5 and the first wheel hub assembly 1 through engagement, and at the same time helps to limit the displacement of the motor cover 5 in the mounting cavity 3.
[0028] In one embodiment, a brake pad 18 is installed on the brake fixing post 17.
[0029] As one implementation method, the limiting and anti-rotation structure of the motor central shaft 6 in this embodiment includes: both ends of the motor central shaft 6 are set as square structures; the limiting and anti-rotation structure also includes a square tube 14, the inner hole shape of the square tube 14 is adapted to the square structure of the motor central shaft 6, and the square tube 14 is sleeved outside the square structure of the motor central shaft 6 to restrict the circumferential rotation of the motor central shaft 6.
[0030] This embodiment provides a brushless hub motor mounting structure for toy cars. The aim is to address the problems of loosening, easy rotation of the central shaft, and poor scene adaptability of existing brushless hub motors for toy cars through targeted structural design, achieving a stable connection and reliable transmission between the motor and the hub assembly. The specific structure and assembly process are as follows: Overall structural composition: The brushless hub motor mounting structure for toy cars in this embodiment mainly includes four core parts: hub assembly, brushless hub motor, first stabilizing structure and second stabilizing structure. Each part works together to realize the transmission of rotational power between the motor and the hub, and to ensure the stability of the overall installation, which is fully suitable for the lightweight and high-frequency start-stop usage scenarios of toy cars.
[0031] Wheel hub assembly: The wheel hub assembly includes at least a first wheel hub assembly 1 and a second wheel hub assembly 2, both made of high-strength plastic material commonly used in toy cars, balancing lightweight and structural strength requirements. Among them: The second wheel hub assembly 2 is integrally formed with an outer ring wheel hub fixing post 10 and an inner ring wheel hub fixing post 11. The inner ring area of the second wheel hub assembly 2 (i.e., the inner wall of the mounting cavity 3) is provided with a protruding part 7 and a recessed part 8 that are adapted to the motor body 4. At the same time, the inner wall of the mounting cavity 3 is also provided with a motor fixing post for fixing the motor. The first wheel hub assembly 1 has an outer ring hole 12 and an inner ring hole 13 respectively at the positions corresponding to the outer ring wheel hub fixing post 10 and the inner ring wheel hub fixing post 11. The inner ring area of the first wheel hub assembly 1 also has a protruding part 7 and a recessed part 8, which are symmetrically arranged with the protruding and recessed parts 8 of the second wheel hub assembly 2. After the first hub assembly 1 and the second hub assembly 2 are closed, bolts are sequentially inserted through the outer ring hole 12 and the inner ring hole 13 of the first hub assembly 1, and then into the outer ring hub fixing post 10 and the inner ring hub fixing post 11 of the second hub assembly 2, thus achieving a fixed connection between the two and forming a closed mounting cavity 3 for accommodating the brushless hub motor. The size of the mounting cavity 3 is precisely matched with the overall size of the brushless hub motor to prevent the motor from shaking inside the cavity.
[0032] Brushless hub motor: The brushless hub motor includes the motor body 4, the motor cover 5, and the motor central shaft 6. The three components work together to achieve power output and structural adaptation. The motor body 4 has a protruding part 7 and a recessed part 8 on its outer periphery. The shape of the protruding and recessed parts 8 is completely matched with the protruding and recessed parts 8 on the inner wall of the wheel hub assembly mounting cavity 3. At the same time, the motor body 4 is integrally formed with a first reinforcing rib 15 and a second reinforcing rib 16: the first reinforcing rib 15 has a screw hole for fixing the motor cover 5; the second reinforcing rib 16 has a through hole for connecting with the motor fixing post of the second wheel hub assembly 2. The motor cover 5 is a circular cover plate structure, with several brake fixing posts 17 arranged around its outer perimeter. The brake fixing posts 17 have mounting holes, and the brake pads 18 can be fixed to the brake fixing posts 17 by bolts, which provides a structural foundation for the subsequent assembly of the braking system on the toy car. At the same time, the motor cover 5 is fixed to the end of the motor body 4 by bolts passing through the screw holes of the first reinforcing rib 15, forming a non-rotatable whole with the motor body 4, ensuring that the two move synchronously when the motor is running. The motor central shaft 6 is equipped with a limiting anti-rotation structure at both ends. Specifically, the motor central shaft 6 is machined into a square structure at both ends, and the outer periphery of the square structure is tapped with external threads. The limiting anti-rotation structure also includes a square tube 14 and a lock nut. The inner hole shape of the square tube 14 is adapted to the square structure of the motor central shaft 6, and a square patch is welded and fixed on the square tube 14. During assembly, the square tube 14 is sleeved on the square structure of the motor central shaft 6. After the motor central shaft 6 passes through the square patch, it is tightened and fixed by the lock nut and the external thread of the shaft body, which directly restricts the circumferential rotation of the motor central shaft 6 and ensures that the central shaft always remains fixed when the motor is running.
[0033] First stabilizing structure: The first stabilizing structure is located between the inner wall of the motor body 4 and the mounting cavity 3 of the hub assembly. It is the core structure for realizing the transmission of rotational power between the motor body 4 and the hub assembly and for initial fixation. It specifically includes two parts: Interlocking force transmission structure: The protruding part 7 on the outer periphery of the motor body 4 is interlocked with the recessed part 8 on the inner wall of the mounting cavity 3, and the recessed part 8 on the outer periphery of the motor body 4 is interlocked with the protruding part 7 on the inner wall of the mounting cavity 3, forming a "flower-shaped interlocking" structure. This structure directly solidifies the rotational force transmission path between the motor body 4 and the hub assembly, avoids relative sliding between the motor body 4 and the mounting cavity 3, and ensures that when the outer rotor of the motor rotates, it can directly drive the hub assembly to rotate synchronously through the motor body 4. Screw reinforcement structure: Based on the interlocking positioning, self-tapping screws are passed through the through hole of the second reinforcing rib 16 of the motor body 4 and driven into the motor fixing post on the inner wall of the mounting cavity 3 of the second wheel hub assembly 2, fixing the motor body 4 and the second wheel hub assembly 2 into one piece; this reinforcement structure not only further enhances the connection reliability between the motor body 4 and the wheel hub assembly, but also helps to limit the axial displacement of the motor body 4 in the mounting cavity 3, avoiding motor displacement caused by deformation of plastic parts when the toy car moves.
[0034] Second stabilizing structure: The second stabilizing structure is located between the first hub assembly 1 and the motor cover 5, and is used to realize the transmission of rotational power between the motor cover 5 and the first hub assembly 1, and to axially limit the motor cover 5. Specifically, it includes a hollow second stabilizing component 9. The second stabilizing component 9 is made of the same plastic material as the first hub component 1. The inner diameter of the hollow ring is adapted to the outer diameter of the square tube 14 of the motor central shaft 6. The outer periphery of the hollow ring is provided with a locking structure (the locking structure consists of a protruding part 7 and a recessed part 8, the shape of which is completely matched with the outer periphery of the brake fixing post 17 of the motor cover 5). During assembly, the second stabilizing component 9 is first fixed to the inner side of the first hub assembly 1 with bolts (the bolts pass through the reserved holes of the second stabilizing component 9 and the screw holes of the first hub assembly 1, forming an integral structure that cannot rotate relative to each other). Then, the brake fixing post 17 of the motor cover 5 is engaged with the locking structure of the second stabilizing component 9. The brake fixing post 17 is embedded in the recessed part 8 of the locking structure, and the protruding part 7 of the locking structure is correspondingly embedded in the gap between the brake fixing post 17. This not only realizes the transmission of rotational power between the motor cover 5 and the first hub assembly 1 (when the motor cover 5 rotates, it drives the second stabilizing component 9 and the first hub assembly 1 to rotate synchronously through the brake fixing post 17), but also limits the axial movement of the motor cover 5 to prevent the motor cover 5 from moving axially in the mounting cavity 3, ensuring the overall smooth operation of the motor.
[0035] Assembly process summary: The brushless hub motor mounting structure for toy cars in this embodiment has a simple and efficient assembly process. The specific steps are as follows: Assembly of motor cover 5 and motor body 4: The motor cover 5 is placed on the end of the motor body 4, and bolts are passed through the screw holes of the first reinforcing rib 15 of the motor body 4 and tightened to fix the two into one piece. Assembly of the motor with the second hub assembly 2: Align the motor body 4 with the mounting cavity 3 of the second hub assembly 2, so that the protrusion / recessed part 8 on the outer periphery of the motor body 4 fits into the recessed / protrusioned part 7 on the inner wall of the mounting cavity 3, and then use self-tapping screws to pass through the through hole of the second reinforcing rib 16 and drive into the motor fixing post to complete the fixing of the motor with the second hub assembly 2. Anti-rotation structure assembly for motor central shaft 6: Square tubes 14 (with square patches welded on the square tubes 14) are fitted onto both ends of motor central shaft 6, and anti-loosening nuts are tightened to restrict the rotation of the central shaft; The second stabilizing component 9 is assembled with the first hub assembly 1: the second stabilizing component 9 is fixed to the inside of the first hub assembly 1 by bolts, ensuring that the engaging structure faces the motor cover 5. First hub assembly 1 and second hub assembly 2 are fitted together: First hub assembly 1 is fitted onto second hub assembly 2, so that the brake fixing post 17 of motor cover 5 is engaged with the locking structure of second stabilizing component 9. At the same time, the outer ring hole 12 and inner ring hole 13 of first hub assembly 1 are aligned with the outer ring and inner ring fixing post of second hub assembly 2, bolts are inserted and tightened to fix them, and the overall assembly is completed.
[0036] This embodiment, through the above structural design, has significant advantages over existing technologies: The first and second stable structures form a dual force transmission path. The motor body 4 drives the second hub assembly 2 through flower-shaped fitting, and the motor cover 5 drives the first hub assembly 1 through a snap-fit structure, ensuring that the hub assembly rotates synchronously as a whole without the risk of force transmission failure. In this embodiment, a triple fixing method of interlocking positioning, screw fixing, and snap-fit limiting is adopted to completely solve the problem of easy loosening of the existing single fixing of the installation structure, and meet the needs of long-term high-frequency use of toy cars. The entire structure is made of plastic, eliminating the need for metal fixing rods and perfectly meeting the lightweight requirements of toy cars. It also has 18 brake pad installation positions, making it more expandable. The matching design of the square shaft and square tube 14 directly restricts the rotation of the central shaft, eliminating additional frictional losses and improving transmission efficiency and structural lifespan.
[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A brushless hub motor mounting structure for toy cars, characterized in that, include: A wheel hub assembly, comprising at least a first wheel hub assembly and a second wheel hub assembly, wherein the first wheel hub assembly and the second wheel hub assembly are fixedly connected after being covered; the first wheel hub assembly and the second wheel hub assembly have mounting cavities for accommodating a brushless wheel hub motor; A brushless hub motor, comprising a motor body, a motor cover and a motor central shaft, wherein the motor central shaft is provided with a limiting anti-rotation structure at both ends; The first stabilizing structure is disposed between the inner wall of the mounting cavity of the motor body and the hub assembly. The first stabilizing structure includes a protruding part and a recessed part on the inner wall of the mounting cavity and a protruding part and a recessed part on the outer periphery of the motor body, which is used to realize the transmission of rotational power between the motor body and the hub assembly. The second stabilizing structure is disposed between the first wheel hub assembly and the motor cover. The second stabilizing structure includes a hollow second stabilizing component, and the outer periphery of the second stabilizing component is provided with a locking structure for realizing the transmission of rotational power between the motor cover and the first wheel hub assembly.
2. The brushless hub motor mounting structure for toy cars according to claim 1, characterized in that, The second wheel assembly is provided with an outer wheel hub fixing post and an inner wheel hub fixing post. The first wheel assembly is provided with an outer ring hole and an inner ring hole at the positions corresponding to the outer wheel hub fixing post and the inner wheel hub fixing post, respectively. After the first wheel assembly and the second wheel assembly are closed, bolts are passed through the outer ring hole and the inner ring hole of the first wheel assembly and enter the outer wheel hub fixing post and the inner wheel hub fixing post of the second wheel assembly, so as to achieve a fixed connection between the two.
3. The brushless hub motor mounting structure for toy cars according to claim 1, characterized in that, In the first stabilizing structure, the protruding part of the outer periphery of the motor body is fitted into the recessed part of the inner wall of the mounting cavity, and the recessed part of the outer periphery of the motor body is fitted into the protruding part of the inner wall of the mounting cavity, so that the motor body and the hub assembly form an integrated structure for power transmission.
4. The brushless hub motor mounting structure for toy cars according to claim 3, characterized in that, The motor body is also provided with a second reinforcing rib, the second reinforcing rib having a through hole, and the inner wall of the mounting cavity of the second hub assembly having a motor fixing post; the screw passes through the through hole and is driven into the motor fixing post to fix the motor body and the second hub assembly as one unit, while also helping to limit the displacement of the motor body in the mounting cavity.
5. The brushless hub motor mounting structure for toy cars according to claim 3, characterized in that, The motor body is also provided with a first reinforcing rib, and the first reinforcing rib has a screw hole; the bolt passes through the screw hole and covers the end of the motor body to form an integral part, so that the motor cover rotates synchronously with the motor body, adapting to the rotational power transmission of the first stabilizing structure and the second stabilizing structure.
6. The brushless hub motor mounting structure for toy cars according to claim 1, characterized in that, The second stabilizing component is fixed to the first wheel hub assembly by bolts, forming an integral part with the first wheel hub assembly; the locking structure of the second stabilizing component has a protruding part and a recessed part, and a plurality of brake fixing posts are arranged around the outer periphery of the motor cover. The outer periphery of the brake fixing posts is adapted to the protruding part and the recessed part of the locking structure, and the locking structure is engaged with the brake fixing posts; the locking structure realizes the transmission of rotational power between the motor cover and the first wheel hub assembly through engagement, and at the same time helps to limit the displacement of the motor cover in the mounting cavity.
7. The brushless hub motor mounting structure for toy cars according to claim 6, characterized in that, Brake pads are installed on the brake mounting post.
8. The brushless hub motor mounting structure for toy cars according to any one of claims 1 to 7, characterized in that, The limiting and anti-rotation structure of the motor central shaft includes: both ends of the motor central shaft are set as square structures; the limiting and anti-rotation structure also includes a square tube, the inner hole shape of which is adapted to the square structure of the motor central shaft, and the square tube is sleeved outside the square structure of the motor central shaft to restrict the circumferential rotation of the motor central shaft.