An axle assembly and a toy vehicle

Abstract

This application relates to the field of toy vehicle technology, specifically disclosing a wheel and axle assembly and a toy vehicle. The wheel and axle assembly includes an axle, a wheel assembly having a first receiving cavity and a first hole, and a sleeve assembly having a second receiving cavity. Along the axial direction of the wheel assembly, the first receiving cavity communicates with the outside through the first hole. A portion of the sleeve assembly is housed in the first receiving cavity and partially extends through the first hole, allowing the wheel assembly to rotate relative to the sleeve assembly about its axis. The portion of the sleeve assembly extending through the first hole has a second hole, through which the second receiving cavity communicates with the outside, and the second hole is located on the same side as the first hole. One end of the axle extends through the second hole into the second receiving cavity, and the portion of the axle housed in the second receiving cavity has a first limiting portion for preventing the axle from disengaging from the second hole. This wheel and axle assembly allows the wheel assembly of the toy vehicle to rotate relative to the sleeve assembly and has high structural stability and reliability.

Description

Description 1 [ ] This application relates to the field of toy car technology, specifically to a wheel and axle assembly and a toy car. 5 [ ] Toy cars are small vehicles that are different from motor vehicles, combining entertainment and fun, and are loved by children and car enthusiasts. Compared to motor vehicles, toy cars are relatively small in size. Toy cars are basically fixed directly to the wheels on the left and right sides by the axle, so that the two wheels are connected. Under the drive of external force or internal electric current, the wheels and axle rotate together, driving the car body to complete the actions of moving forward, backward or turning, etc. Because the wheels and axle are directly fixed, during the driving process, it can be observed along the axis of the axle that the wheels and axle have different rotation speeds or the wheels rotate while the axle is relatively stationary. Or, although the wheels and axle can achieve relative rotation, the relative rotation of the various components in the wheel and axle assembly reduces the structural stability and reliability of the toy car. 15 [ ] The purpose of this application is to provide a wheel and axle assembly and a toy car, so that the various components in the wheel and axle assembly of the toy car can rotate relative to each other, and have high structural stability and reliability. The specific technical solution is as follows: A wheel and axle assembly includes: 20 A wheel body assembly, the wheel body assembly having a first receiving cavity, and a first hole along the axial direction of the wheel body assembly, the first receiving cavity communicating with the outside through the first hole; A sleeve assembly, a portion of the sleeve assembly being housed in the first receiving cavity and a portion extending through the first hole, the wheel body assembly being rotatable relative to the sleeve assembly about the axis of the wheel body assembly; the sleeve assembly having a second receiving cavity, the portion of the sleeve assembly extending through the first hole having a second hole, 25 the second receiving cavity communicating with the outside through the second hole, and the second hole being disposed on the same side as the first hole; A vehicle axle, one end of the vehicle axle extending through the second hole and into the second receiving cavity, the portion of the vehicle axle housed in the second receiving cavity having a first limiting portion, the first limiting portion being used to restrict the vehicle axle from disengaging from the second hole. In some possible embodiments, in the axial direction of the wheel body assembly, the size of the first limiting portion is smaller than the size of the second receiving cavity. In some possible implementations, the size of the first limiting portion is smaller than the size of the second receiving cavity in the axial direction perpendicular to the wheel assembly. In some possible implementations, the first limiting portion may have a first orthographic projection on a plane perpendicular to the axial direction of the second hole, and the second hole may enclose a second orthographic projection; at least a portion of the first orthographic projection extends beyond the second orthographic projection.In some possible embodiments, the socket assembly includes: 10 a first socket, the first socket having a first groove at its end facing the first hole, the opening of the first groove facing the first hole; 15 a second socket, the second socket having a second groove at its end facing the first socket, the opening of the second groove facing the first groove, a portion of the second socket being embedded in the first groove and connected to the first socket, so that the first groove and the second groove enclose the second receiving cavity, the second hole being disposed in the second socket and communicating with the second groove. In some possible embodiments, the portion of the socket assembly that passes through the first hole is exposed at the end of the first hole away from the first receiving cavity. In some possible implementations, the wheel axle assembly further includes a bearing mounted in the first hole, the outer ring of the bearing being connected to the wheel body assembly, and the inner ring of the bearing being connected to the portion of the sleeve assembly that passes through the first hole; and / or, the wheel axle assembly further includes a bearing mounted in the first hole, the outer ring of the bearing being connected to the wheel body assembly; the inner ring of the bearing being connected to the portion of the sleeve assembly that passes through the first hole; the inner sidewall of the first hole is provided with a flange for restricting the bearing from sliding out of the first hole. In some possible implementations, the socket assembly is provided with a second limiting portion, which abuts against the axle to restrict the rotation of the axle relative to the socket assembly; or, the frictional force between the axle and the inner sidewall of the second hole is greater than the frictional force between the socket assembly and the inner sidewall of the first hole; or, a lubricant is added between the socket assembly and the first hole; or, the socket assembly is provided with a third limiting portion, which is used to engage and limit the socket assembly with the chassis of the toy car. 5. In some possible embodiments, the wheel assembly includes a wheel and a tire, the tire being fitted onto the outer periphery of the wheel; the wheel has the first receiving cavity, and the end of the wheel assembly opposite to the first hole has a hollow portion, the hollow portion communicating with the first receiving cavity; the size of the fitting assembly located within the first receiving cavity is smaller than the size of the first receiving cavity; and / or, 10. The wheel assembly includes a wheel and a tire, the tire being fitted onto the outer periphery of the wheel, the outer periphery of the wheel having a protrusion, the protrusion protruding along the radial direction of the wheel in a direction away from the first receiving cavity. Further, a toy car is provided, the toy car including the wheel axle assembly described in any of the above embodiments.Compared to existing technologies, the wheel axle assembly of this application has a first receiving cavity in the wheel body assembly, and the sleeve assembly for the axle to pass through is housed in the first receiving cavity. This allows the axle and the wheel body assembly to not be in direct contact, and the axle does not need to be directly fixed to the wheel body assembly. The wheel body assembly can rotate relative to the axle and the sleeve assembly using the axle of the wheel body assembly as a rotation axis, effectively realizing the relative rotation of the components in the wheel axle assembly of the toy car. At the same time, a first limiting part is provided at the part where the axle passes through the second receiving cavity of the sleeve assembly, effectively preventing the axle from coming off the wheel body assembly during the toy car's operation or under the action of external force, thereby improving the overall structural stability and reliability of the wheel axle assembly and the toy car. [ ] Figure 1 is a three-dimensional structural schematic diagram of the wheel and axle assembly provided in the embodiment of this application; Figure 2 is an exploded structural schematic diagram of the wheel and axle assembly provided in the embodiment of this application; Figure 3 is a front view schematic diagram of the wheel and axle assembly provided in the embodiment of this application; Figure 4 is a cross-sectional schematic diagram along line AA in Figure 3 in the embodiment of this application; Figure 5 is a partially enlarged schematic diagram of point M in Figure 4 in the embodiment of this application; Figure 6 is a longitudinal section schematic diagram of the wheel in the embodiment of this application; Figure 7 is a longitudinal section schematic diagram of the sleeve assembly in the embodiment of this application; Figure 8 is a frontal projection schematic diagram of the first limiting part and the second hole in the embodiment of this application; Figure 9 is a side view schematic diagram of the toy car provided in the embodiment of this application; Figure 10 is a partial longitudinal section schematic diagram of the wheel and axle assembly provided in another embodiment of this application; Figure 11 is a partial longitudinal section schematic diagram of the wheel and axle assembly provided in yet another embodiment of this application; Figure 12 is a three-dimensional structural schematic diagram of the wheel and axle assembly provided in yet another embodiment of this application; Figure 13 is a partial top view schematic diagram of the toy car with the chassis and wheel and axle assembly installed in yet another embodiment of this application. Reference numerals: 10. Wheel and axle assembly; 11. Wheel assembly; 110. First receiving cavity; 1101. First hole; 1102. Third hole; 111. Wheel; 1110. Hollowed-out part; 1111. Protrusion; 1112. Flange; 112. Tire; 113. Outer cover; 15 12. Sleeve assembly; 120. Second receiving cavity; 1201. Second hole; 12010. Second orthographic projection; 121. First sleeve; 1210. First groove; 122. Second sleeve; 1220. Second groove; 123. Second limiting part; 124. Third limiting part; 1200. Marking; 13. Axle; 131. First limiting part; 1310. First orthographic projection; 14. Bearing; 20 20. Toy car; 21. Chassis; 211. Snap-fit ​​part. 【 】 The present application will be further described below with reference to the accompanying drawings and embodiments. In this specification, appropriate interpretations may be made based on the actual situation.25 Please refer to Figures 1, 2, 5, 6 and 9. The wheel and axle assembly 10 provided in this application embodiment includes a wheel assembly 11, a sleeve assembly 12 and an axle 13. The wheel assembly 11 has a first receiving cavity 110. Along the axial direction of the wheel assembly 11, the wheel assembly 11 has a first hole 1101, through which the first receiving cavity 1101 communicates with the outside. A portion of the sleeve assembly 12 is housed in the first receiving cavity 110 and partially extends through the first hole 1101. The wheel assembly 11 can rotate relative to the sleeve assembly 12 about its axis. The sleeve assembly 12 has a second receiving cavity 120. The portion of the sleeve assembly 12 that extends through the first hole 1101 has a second hole 1201, through which the second receiving cavity 120 communicates with the outside. The second hole 1201 is located on the same side as the first hole 1101. One end of the axle 13 extends through the second hole 1201. Extending to the second receiving cavity 120, the portion of the axle 13 that is received in the second receiving cavity 120 is provided with a first limiting part 131, which is used to restrict the axle 13 from coming out of the second hole 1201. In the above embodiment, the sleeve assembly 12 is housed in the first receiving cavity 110 of the wheel assembly 11. The sleeve assembly 12 is provided with a second receiving cavity 120. One end of the axle 13 passes through the second receiving cavity 120, and the axle 13 located in the second receiving cavity 120 is provided with a first limiting part 131. This can prevent the axle 13 of the toy car 20 from being directly fixedly connected to the wheel assembly 11, and can also effectively prevent the axle 13 from coming off. More importantly, the wheel assembly 11 can rotate relative to the sleeve assembly 12 with the axle of the wheel assembly 11 as the rotation axis. This can effectively realize that the wheels and axle 13 of the toy car 20 can rotate relative to each other or that the axle 13 can be stationary relative to the wheels, while ensuring that the structure of the wheel assembly 10 has high stability and reliability. 15. Referring to Figures 2, 5, and 9, in some embodiments, the wheel assembly 11 includes a wheel 111 and a tire 112. The wheel 111 has a first receiving cavity 110. The size of the sleeve assembly 12 in the first receiving cavity 110 is smaller than the size of the first receiving cavity 110, thereby effectively preventing friction between the wheel assembly 11 and the sleeve assembly 12 when rotating, which would cause the toy car 20 to drop in speed rapidly. Along the axial direction of the wheel 111, a first hole 1101 is provided at one end of the wheel 111. The first hole 1101 is used for partial passage of the sleeve assembly 12, and the tire 112 is fitted onto the outer periphery of the wheel 111.By providing a tire 112 on the outer periphery of the wheel 111, the rigid collision contact between the toy car 20 and the ground is reduced, thereby effectively improving the structural stability and reliability of the toy car 20 during operation. Referring to Figures 1, 2, 5, and 6, in some embodiments, the wheel assembly 11 further includes an outer cover 113, which is disposed at the end of the wheel 111 opposite to the end where the first hole 1101 is located. The wheel 111 has a third hole 1102, which is opposite to the first hole 1101, for the outer cover 113 to be inserted and installed. Referring to Figures 1, 5, and 9, in some embodiments, the wheel assembly 11 also has a hollow portion 1110, which is disposed at the end of the wheel assembly 11 opposite to the first hole 1101, and the hollow portion 1110 communicates with the first receiving cavity 110. In some embodiments, the cutout portion 1110 is provided on the outer cover 113. By providing the cutout portion 1110, it is possible to effectively observe the relative rotation of the wheel assembly 11 and the sleeve assembly 12 during the movement of the toy car 20, or the state where the wheel assembly 11 rotates while the sleeve assembly 12 does not rotate. Referring to Figures 2 and 6, in some embodiments, the outer periphery of the wheel 111 is provided with a protrusion 1111. The protrusion 1111 protrudes along the radial direction of the wheel 111 in a direction away from the first receiving cavity 110. By providing the protrusion 1111, the stability and reliability of the connection between the tire 112 and the wheel 111 can be effectively improved. In some embodiments, the protrusion 1111 is arranged around the circumference of the wheel 111, while in some embodiments, a plurality of protrusions 1111 are spaced apart along the circumference of the wheel 111. Referring to Figures 6 and 5, in some embodiments, in the wheel 111, the diameter of the first hole 1101 is 10 smaller than the radial dimension of the first receiving cavity 110 in the axle 13, and the radial dimension of the first receiving cavity 110 in the axle 13 is smaller than the diameter of the third hole 1102. This structural arrangement facilitates the installation of the axle 13 and the sleeve assembly 12, etc., into the wheel 111. Referring to Figures 7, 5, and 9, in some embodiments, the sleeve assembly 12 includes a first sleeve 121 and a second sleeve 122.The first sleeve 121 has a first groove 1210 at its end facing the first hole 1101, with the opening of the first groove 1210 facing the first hole 1101. The second sleeve 122 has a second groove 1220 at its end facing the first sleeve 121, with the opening of the second groove 1220 facing the first groove 1210. A portion of the second sleeve 122 is embedded in the first groove 1210, and the second sleeve 122 is connected to the first sleeve 121, so that the first groove 1210 and the second groove 1220 enclose a second receiving cavity 120. A second hole 1201 is provided in the second sleeve 122, and the second hole 1201 communicates with the second groove 1220. In some embodiments, the first connector 121 and the second connector 122 are connected by snap-fit, glue, or welding, thereby effectively improving the stability and reliability of the connection between the first connector 121 and the second connector 122, and effectively reducing the possibility of the toy car 20 disintegrating due to driving or accidental falls. In the aforementioned embodiments, the first connector 121 and the second connector 122 are separate structures, which facilitates the manufacturing process of the wheel axle assembly 10. First, one end of the axle 13 is placed in the second groove 1220, and then the first connector 121 and the second connector 122 are assembled, thereby housing one end of the axle 13 within the second receiving cavity 120. In some embodiments, the first socket 121 and the second socket 122 may also be integrally formed, as long as it enables the axle 13 to be installed into the socket assembly 12 and the socket assembly 12 to be installed into the first receiving cavity 110. In some embodiments, the end of the first socket 121 facing away from the first groove 1210 has a gap with the end of the wheel assembly 11 facing away from the first hole 1101, so as to effectively prevent the wheel assembly 11 from rubbing against the socket assembly 12 when it rotates relative to the socket assembly 12. Referring to Figures 5 and 7, in some embodiments, in the socket assembly 12, the portion passing through the first hole 11015 extends outward from the end of the first hole 1101 away from the first receiving cavity 110. Specifically, along the axial direction of the wheel assembly 11, the length of the first hole 1101 is smaller than the length of the portion of the sleeve assembly 12 that extends through the first hole 1101. That is, in the second sleeve 122, the end away from the second groove 1220, in addition to passing through the first hole 1101, also extends to be exposed outside the first hole 1101.The structure of the second fitting 122 effectively improves the strength of the connection with the axle 13, thereby improving the structural stability and reliability of the wheel axle assembly 10. Referring to Figure 10, in some alternative embodiments, the frictional force between the axle 13 and the inner wall of the second hole 1201 is greater than the frictional force between the fitting 12 and the inner wall of the first hole 1101, thus making relative rotation between the wheel assembly 11 and the fitting 12 easier relative to that between the axle 13 and the fitting 12. In other alternative embodiments, a lubricant 15 is applied between the first hole 1101 and the fitting 12, making relative rotation between the wheel assembly 11 and the fitting 12 easier relative to that between the axle 13 and the fitting 12. Referring to Figure 11, in some embodiments, the sleeve assembly 12 is provided with a second limiting portion 123, which abuts against the axle 13 to restrict the rotation of the axle 13 relative to the sleeve assembly 12. In some embodiments, the second limiting portion 123 extends along the axial direction of the wheel axle assembly 10 and is located in the direction of the 20th sleeve 121 facing the axle 13. In this way, by applying an external force to the end of the wheel axle assembly 10 opposite to the first hole 1101, the first sleeve 121 is subjected to an external force and deforms in the direction of the axle 13, so that the second limiting portion 123 abuts against the axle 13, making the sleeve assembly 12 and the axle 13 integrated, thereby restricting the rotation of the axle 13 relative to the sleeve assembly 12. In this case, both the outer cover 113 and the first sleeve 121 have a certain degree of elasticity to meet the requirement of deformation when an external force is applied. In some embodiments, the second limiting portion 123 may also be disposed on the second socket 122 and extend radially along the axle 13 to abut against the axle 13. In some embodiments, the second limiting portion 123 may be a screw or stud disposed at one end of the socket assembly 12 exposed in the first hole 1101 and extending radially along the axle 13, and may be screwed in or out as needed to connect or separate the socket assembly 12 from the axle 13. For example, it may be disposed at one end of the second socket 122 away from the first socket 121. When screwed in, the second socket 122 may be tightly connected to the axle 13, and when screwed out, the second socket 122 may be separated from the axle 13. Please refer to Figures 12, 9, 7 and 13. In some embodiments, the socket assembly 12 is provided with a third limiting portion 124 for engaging and limiting with the chassis 21 of the toy car 20.In some embodiments, the third limiting part 124 is provided on the second socket 122 to facilitate engagement and limiting with the chassis 21 of the toy car 20. In some embodiments, the third limiting part 124 is provided at the end of the second socket 122 away from the first socket 121 and extends along the axial direction of the second hole 1201 or along the radial direction of the second hole 1201, so as to effectively engage with the chassis 21 of the toy car 20 without occupying space, not affecting the aesthetics of the toy car 20, and not affecting the rotation of the wheel axle assembly 10, thereby restricting the rotation of the socket assembly 12. By setting the third limiting part 124, if a mark 1200 is provided on the end of the sleeve assembly 12 facing away from the first hole 1101, for example, after the end of the first sleeve 121 facing away from the second sleeve 122 is painted with a different color, when the wheel assembly 11 in the wheel axle assembly 10 rotates relative to the sleeve assembly 12 and the axle 13, the mark 1200 will remain fixed. That is, when the wheel assembly 11 rotates relative to the sleeve assembly 12 and the axle 13, although there is no brake drum and brake pads, it can achieve a visual effect similar to the brake drum rotating while the brake pads do not rotate when the vehicle is in motion. More importantly, the third limiting part 124 effectively ensures that the structure of the wheel axle assembly 10 has high stability and reliability. Referring to Figures 5, 2, and 6, in some embodiments, the wheel axle assembly 10 further includes a bearing 14, which is installed within the first hole 1101, and the outer ring of the bearing 14 is connected to the wheel body assembly 11. Simultaneously, the bearing 14 is sleeved on the outer periphery of the sleeve assembly 12, allowing the wheel body assembly 11 to rotate relative to the axle 13 and the sleeve assembly 12 under the action of the bearing 14. Specifically, the bearing 14 is sleeved on the outer periphery of the portion of the sleeve assembly 12 that passes through the first hole 1101, such that a portion of the sleeve assembly 12 passes through the inner ring of the bearing 14, while the wheel body assembly 11 is connected to the outer ring of the bearing 14. When the wheel axle assembly 10 also includes the bearing 14, the wheel 111 is provided with a flange 1112, which is located on the inner sidewall of the first hole 110125 and extends towards the central axis of the first hole 1101, effectively preventing the bearing 14 from slipping out of the first hole 1101. In some embodiments, the flange 1112 is located at the end of the first hole 1101 that is away from the first receiving cavity 110.8 HK 30135238 A Specification 9 Please refer to Figures 6 and 5. In some embodiments, in the axial direction of the wheel assembly 11, the size of the first limiting portion 131 is smaller than the size of the second receiving cavity 120, thereby allowing the axle 13 to have free space to move within the second receiving cavity 120. In some embodiments, in the axial direction perpendicular to the wheel assembly 11, the size of the first limiting portion 131 is smaller than the size of the second receiving cavity 120, to effectively prevent the axle 13 from getting stuck when rotating relative to the sleeve assembly 12. 5. Referring to Figures 8, 5, and 7, in some embodiments, on a plane perpendicular to the axial direction of the second hole 1201, the first limiting portion 131 may have a first orthographic projection 1310 formed on this plane, and the second hole 1201 may enclose a second orthographic projection 12010 on this plane. At least a portion of the first orthographic projection 1310 extends beyond the second orthographic projection 12010, which effectively ensures that the first limiting portion 131 limits the axle 13 and prevents the axle 13 from coming out of the second hole 1201. In some embodiments, the first limiting portion 131 may be circumferentially arranged along the radial direction of the axle 13, as shown in Figure 8(A). Of course, in some alternative embodiments, the first limiting part 131 may only protrude along one radial direction of the axle 13, as shown in Figure 8 (B); or there may be multiple first limiting parts 131, arranged at intervals along the circumference of the axle 13, as shown in Figure 8 (D); or they may protrude in a fan shape, as specifically shown in Figure 8 (C). Regardless of the form, as long as the axle 13 can be effectively prevented from coming out of the second hole 1201, and a certain structural strength is met, such as effectively preventing the axle 13 from being pulled out of the sleeve assembly 12 by applying opposite external forces to the wheel assembly 11 and the axle 13. Please refer to Figures 1, 3, and 9. In any of the above embodiments, each axle 13 has a wheel assembly 11 and a sleeve assembly 12 at opposite ends, so that the toy car 20 can be obtained by adding the remaining parts of the toy car 20 to the wheel assembly 10. Therefore, this application embodiment further provides a toy car 20, which includes the aforementioned wheel and axle assembly 10.Please refer to Figures 9, 1, 3, 4, and 5. In some embodiments, a toy car 20 includes at least two sets of the aforementioned wheel and axle assemblies 10. Each wheel and axle assembly 10 includes two wheel bodies assemblies 11, two connecting assemblies 12, and an axle 13. One wheel body assembly 11 and one connecting assembly 12 constitute a wheel structure of the toy car 20 in the manner described above. A first limiting portion 131 is provided at each of the opposite ends of the axle 13. Please refer to Figures 13, 12, and 9. In some embodiments, a toy car 20 includes a chassis 21. The chassis 21 is provided with a snap-fit ​​portion 211, which is used to snap-fit ​​and limit the third limiting portion 9 HK 30135238 A Specification 10 124 in the wheel and axle assembly 10. This allows for snap-fit ​​and limiting of the connecting assembly 12 and the chassis 21, restricting the rotation of the connecting assembly 12 and improving the structural stability and reliability of the toy car 20. In some embodiments, only one of the connecting components 12 in one axle assembly 10 needs to have a third limiting part 124. In other embodiments, two connecting components 12 in one axle assembly 10 each have a third limiting part 124, further improving the structural stability and reliability of the toy car 20. By setting the third limiting part 124, if a mark 1200 is provided at the end of the connecting component 12 facing away from the first hole 1101, for example, after the end of the first connecting component 121 facing away from the second connecting component 122 is painted with a different color, when the toy car 20 is in motion, when viewed from the side of the toy car 20, the wheel assembly 11 can be seen to rotate while the mark 1200 remains stationary. That is, the wheel assembly 11 rotates relative to the connecting component 12 and the axle 13. Thus, when the toy car 20 is in motion, although the toy car 20 does not have a brake drum and brake pads, it can achieve a visual effect similar to that of a motor vehicle when the brake drum 10 rotates while the brake pads do not rotate. More importantly, the third limiting part 124 effectively ensures that the overall structure of the toy car 20 has high stability and reliability. The above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this application, such as combining different features in various embodiments, and these all fall within the protection scope of this application.10 HK 30135238 A Claim 1. A wheel and axle assembly, characterized in that it comprises: a wheel body assembly, the wheel body assembly having a first receiving cavity, and along the axial direction of the wheel body assembly, the wheel body assembly having a first hole, the first receiving cavity communicating with the outside through the first hole; a sleeve assembly, a portion of the sleeve assembly being received in the first receiving cavity and a portion extending through the first hole, the wheel body assembly being rotatable relative to the sleeve assembly about the axis of the wheel body assembly; the sleeve assembly having a second receiving cavity, the portion of the sleeve assembly extending through the first hole having a second hole, the second receiving cavity communicating with the outside through the second hole, and the second hole being disposed on the same side as the first hole; an axle, one end of the axle extending through the second hole and into the second receiving cavity, the portion of the axle received in the second receiving cavity having a first limiting portion, the first limiting portion being used to limit the axle from dislodging from the second hole. 2. 1. The wheel and axle assembly according to claim 1, wherein the size of the first limiting portion is smaller than the size of the second receiving cavity in the axial direction of the wheel assembly. 2. The wheel and axle assembly according to claim 1, wherein the size of the first limiting portion is smaller than the size of the second receiving cavity in the axial direction perpendicular to the wheel assembly. 3. The wheel and axle assembly according to claim 1, wherein the first limiting portion may form a first orthographic projection on a plane perpendicular to the axial direction of the second hole, and the second hole may enclose a second orthographic projection; at least a portion of the first orthographic projection extends beyond the second orthographic projection. 5. The wheel and axle assembly according to claim 1, wherein the sleeve assembly comprises: 20 a first sleeve member, the end of the first sleeve member facing the first hole having a first groove, the opening of the first groove facing the first hole; a second sleeve member, the end of the second sleeve member facing the first sleeve member having a second groove, the opening of the second groove facing the first groove, a portion of the second sleeve member being embedded in the first groove and connected to the first sleeve member, so that the first groove and the second groove enclose a 25 second receiving cavity, the second hole being disposed in the second sleeve member and communicating with the second groove. 6. The wheel and axle assembly according to claim 1, wherein the portion of the sleeve assembly passing through the first hole is exposed at the end of the first hole away from the first receiving cavity.1 HK 30135238 A Claim 2 7. The wheel and axle assembly according to any one of claims 1 to 6, characterized in that the wheel and axle assembly further includes a bearing, the bearing being installed in the first hole, the outer ring of the bearing being connected to the wheel body assembly, and the inner ring of the bearing being connected to the portion of the sleeve assembly that passes through the first hole; and / or, 5 The wheel and axle assembly further includes a bearing, the bearing being installed in the first hole, the outer ring of the bearing being connected to the wheel body assembly; the inner ring of the bearing being connected to the portion of the sleeve assembly that passes through the first hole; the inner sidewall of the first hole is provided with a flange, the flange being used to restrict the bearing from sliding out of the first hole. 8. The wheel and axle assembly according to any one of claims 1 to 6, characterized in that the sleeve assembly 10 is provided with a second limiting portion, the second limiting portion being used to abut against the axle to restrict the rotation of the axle relative to the sleeve assembly; or, the frictional force between the axle and the inner sidewall of the second hole is greater than the frictional force between the sleeve assembly and the inner sidewall of the first hole; or, a lubricant is added between the sleeve assembly and the first hole; or, the sleeve assembly 15 is provided with a third limiting portion, the third limiting portion being used to engage and limit the sleeve assembly with the chassis of the toy car. 9. According to claim 1, the wheel assembly is characterized in that the wheel assembly includes a wheel and a tire, the tire being fitted onto the outer periphery of the wheel; the wheel has a first receiving cavity, the end of the wheel assembly opposite to the first hole has a hollow portion, the hollow portion communicating with the first receiving cavity, and the size of the fitting assembly located in the first receiving cavity is smaller than the size of the first receiving cavity; and / or, the wheel assembly includes a wheel and a tire, the tire being fitted onto the outer periphery of the wheel, the outer periphery of the wheel has a protrusion, the protrusion protruding along the radial direction of the wheel in a direction away from the first receiving cavity. 10. A toy car, characterized in that the toy car includes the wheel assembly according to any one of claims 1 to 9.2 HK 30135238 A Instruction Manual Appendix 1 Figure 1 Figure 2 13 11 12 113 11 1110 10 10 13 131 14 11 111 112 113110 1111 1101 12 121 122 14 1 HK 30135238 A Instruction Manual Appendix 2 Figure 3 Figure 4 10 AA 11 11 13 AA M 13 2 HK 30135238 A Instruction Manual Appendix 3 Figure 5 Figure 6 M 1112 1101 1110 113 110 120 11 112 111 121 122 12 13 131 111 1112 1101 110 1102 1111 3 HK 30135238 A Instruction Manual Appendix 4 Figure 7 Figure 8 12 1201 1220 1210 121 122 (A) (B) 1310 12010 1310 12010 1310 12010 1310 12010 (C) (D) 4 HK 30135238 A Instruction Manual Appendix 5 Figure 9 Figure 10 20 10 10 1200 1200 13 120 110 1110 121 122 12 1101 11 112 111 1112113 5 HK 30135238 A Instruction Manual Appendix 6 Figure 11 Figure 12 120 110 1110 123 13 13 11 12 113 11 10 124 124 6 HK 30135238 A Instruction Manual Appendix 7 Figure 13 20 10 124 21 211 7 HK 30135238 A.