A speed change device for a toy vehicle

Abstract

The utility model discloses a speed changer of toy car, including speed changer body and drive arrangement, speed changer body includes driving rod, conversion subassembly, first gear train subassembly and second gear train subassembly, first gear train subassembly, conversion subassembly and second gear train subassembly are sequentially inserted on driving rod, the output of drive arrangement is connected with the input of driving rod, wherein, when first gear train subassembly is connected with conversion subassembly, driving rod drives first gear train subassembly to rotate, and first gear train subassembly is connected first output through first drive link, and speed changer is in acceleration state, when second gear train subassembly is connected with conversion subassembly, driving rod drives second gear train subassembly to rotate, and second gear train subassembly is connected second output through second drive link, and speed changer is in deceleration state. Children observe the rotation and switching process of gear intuitively in playing. Cultivate their interest in science and technology in the form of play.

Description

Technical Field

[0001] This utility model relates to the field of toy speed change, specifically a speed change device for a toy car. Background Technology

[0002] Most existing toy car transmission mechanisms are relatively simple, typically involving a fixed set of transmission gears driving the wheel axle to rotate after the motor is started. For example, Chinese utility model CN217773216U discloses a variable speed drive device for a toy car, characterized by including a starting component and a speed-changing component. The starting component includes a motor, and the speed-changing component includes a first gear set, a second gear set, a rotating rod, and a toggle member. The transmission ratio of the first gear set is greater than that of the second gear set, and the first gear set includes meshing first and second gears. The second gear set includes meshing third and fourth gears. The first and third gears are coaxially connected and driven to rotate by the motor. The second and fourth gears are slidably fitted onto the rotating rod. The toggle member is axially movable and connected to the rotating rod, and is detachably connected to both the second and fourth gears. When the toggle member moves to connect with either the second or fourth gear, it rotates accordingly, driving the rotating rod to rotate.

[0003] The applicant's research revealed that existing technologies are not only structurally complex but also limit the diverse speed and control needs of toy cars for different age groups, including teenagers and children, significantly reducing overall fun. Furthermore, while some toy cars currently offer speed adjustment functions, their adjustment mechanisms are often quite complex, potentially leading to switching failures due to insufficient force or incorrect direction. In addition, the lack of visual gear indicators hinders operation. These limitations make widespread application in the general youth toy car market difficult, failing to meet teenagers' expectations for toy cars that are both simple to use and offer flexible speed adjustment. Utility Model Content

[0004] In order to overcome the technical defects of the prior art, such as complex structure and the possibility of switching failure due to insufficient force or incorrect direction, this utility model provides a speed change device for a toy car.

[0005] To solve the above problems, this utility model is implemented according to the following technical solution:

[0006] The present invention discloses a speed-changing device for a toy car, comprising a speed-changing device body and a drive device; the speed-changing device body includes a drive rod, a conversion assembly, a first gear train assembly, and a second gear train assembly; the first gear train assembly, the conversion assembly, and the second gear train assembly are sequentially inserted into the drive rod; the output end of the drive device is kinetically connected to the input end of the drive rod; wherein, when the first gear train assembly is connected to the conversion assembly, the drive rod drives the first gear train assembly to rotate, and the first gear train assembly is connected to the first output end through a first transmission rod, and the speed-changing device is in an acceleration state; when the second gear train assembly is connected to the conversion assembly, the drive rod drives the second gear train assembly to rotate, and the second gear train assembly is connected to the second output end through a second transmission rod, and the speed-changing device is in a deceleration state.

[0007] Preferably, the first gear train assembly includes a first driving gear train and a first driven gear train; the first driving gear train meshes with the first driven gear train; the first driving gear train is disposed on the driving rod, and the first driving gear train is provided with a first engaging portion.

[0008] Preferably, the second gear train assembly includes a second driving gear train and a second driven gear train; the second driving gear train meshes with the second driven gear train; the second driving gear train is disposed on the driving rod, and a second engaging portion is provided on the second driving gear train.

[0009] Preferably, the conversion assembly includes a first switching part and a second switching part; the conversion assembly can selectively engage the first switching part with the first engaging part or engage the second switching part with the second engaging part by axial sliding, thereby realizing the switching of power between the first gear train assembly and the second gear train assembly.

[0010] Preferably, the first driven gear train is connected to the second driven gear train via a driven rod.

[0011] Preferably, the number of gears in the second driving gear system is greater than the number of gears in the first driving gear system.

[0012] Preferably, the conversion assembly further includes: a lever, a fixed rod, a sliding member, and a connecting rod; the lever is fixed to the chassis frame; a bushing is provided on the sliding member, and the bushing is sleeved on the fixed rod, so that the sliding member can slide relative to the fixed rod; the connecting rod connects the lever and the sliding member; wherein, the sliding member is embedded between the first switching part and the second switching part, and the lever drives the sliding member to slide along the fixed rod through the connecting rod, thereby driving the first switching part and the second switching part to slide axially.

[0013] Preferably, a shock-absorbing device is connected below the drive device, and the shock-absorbing device is used to protect the drive device.

[0014] Preferably, a toy car provided in the second aspect of the present invention includes a chassis frame and a transmission device as described in the first aspect of the present invention, wherein the transmission device is mounted on the chassis frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The speed-changing device described in this application can be applied to various toy cars, enabling them to achieve two speed modes. When the first gear train assembly is connected to the conversion assembly, the toy car is in a high-speed state, simulating a real vehicle at high speed; when the second gear train assembly is connected to the conversion assembly, the toy car decelerates, simulating a vehicle slowing down. This speed-changing function makes the toy car more varied and challenging to play with, increasing children's fun and novelty, allowing them to experience the joy of driving more deeply, as if they were controlling a real car, thus improving the toy car's playability. The design of the speed-changing device itself allows the toy car to adjust its speed according to different road conditions and play needs. In wide, flat areas, such as outdoor playgrounds or large open spaces, children can switch to acceleration mode to make the toy car move quickly and enjoy the thrill of speed. In narrow spaces, such as indoor rooms or areas with obstacles, switching to deceleration mode allows the toy car to move slowly and steadily, making it easier for children to control the direction and avoid obstacles. This improves the toy car's adaptability and maneuverability in various environments, enabling children to more precisely control the car's movement and enhancing their autonomy and sense of accomplishment during play. The structure of this variable-speed toy car is relatively simple and intuitive. The speed-changing function is achieved through the cooperation of the drive lever, conversion assembly, first gear train assembly, and second gear train assembly. During play, children can directly observe the rotation and switching process of the gears, gaining a preliminary sensory understanding of the mechanical transmission principles of vehicles. This edutainment approach helps stimulate children's curiosity and desire to explore mechanical knowledge, laying a foundation for their future studies in physics, mechanical engineering, and other related fields, and cultivating their interest and love for science and technology. Attached Figure Description

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the transmission device of a toy car according to the present invention;

[0019] Figure 2 This is a schematic diagram of the speed change device of a toy car according to this utility model from another perspective.

[0020] Figure 3 yes Figure 2 Sectional view of AA;

[0021] Figure 4 This is a schematic diagram of the internal structure of the transmission device body in a toy car according to the present invention.

[0022] Figure 5 This is a schematic diagram of the internal structure of the transmission device body in a toy car according to this utility model from another perspective.

[0023] Figure 6 yes Figure 5 Sectional view of BB;

[0024] In the diagram: 1 - Chassis frame;

[0025] 2-Transmission device body, 21-Input end, 22-Drive lever, 23-Conversion assembly, 231-First switching part, 232-Second switching part, 233-Pulse lever, 234-Fixed rod, 235-Sliding member, 2351-Shaft sleeve, 236-Connecting rod, 24-First gear train assembly, 241-First driving gear train, 2411-First locking part, 242-First driven gear train, 25-Second gear train assembly, 251-Second driving gear train, 2511-Second locking part, 252-Second driven gear train, 26-Driven lever;

[0026] 3-Drive device, 31-Output terminal;

[0027] 4-Shock absorber; 41-Spring;

[0028] 5 - First output end, 51 - First transmission rod;

[0029] 6 - Second output end, 61 - Second transmission rod. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] like Figures 1-6 As shown, the toy car transmission device of this utility model includes a transmission device body 2 and a drive device 3; the transmission device body 2 includes a drive rod 22, a conversion component 23, a first gear train component 24 and a second gear train component 25; the first gear train component 24, the conversion component 23 and the second gear train component 25 are sequentially inserted into the drive rod 22; the output end 31 of the drive device 3 is connected to the input end 21 of the drive rod 22.

[0032] The first gear train assembly 24 is connected to the conversion assembly 23, the driving rod 22 drives the first gear train assembly 24 to rotate, and the first gear train assembly 24 is connected to the first output end 5 through the first transmission rod 51; when the second gear train assembly 25 is connected to the conversion assembly 23, the driving rod 22 drives the second gear train assembly 25 to rotate, and the second gear train assembly 25 is connected to the second output end 6 through the second transmission rod 61.

[0033] It is understood that the speed change device described in this utility model includes a speed change device body 2 and a drive device 3. The chassis frame 1 is the main frame structure of the toy car, which is used to bear and support the parts of the entire toy car, ensuring the stability and integrity of the toy car. Its shape and size are adapted to the size and design requirements of the toy car.

[0034] The gear transmission unit 2 is a key component for realizing speed changes in the toy car. It is cleverly set on the chassis frame 1. This layout helps to ensure the power transmission efficiency and body balance of the toy car, and avoids left and right deviation or instability during the driving process caused by improper positioning of the gear transmission unit 2.

[0035] The drive unit 3 is the part that provides the power source for the toy car. Its output end 31 is connected to the input end 21 of the transmission unit body 2 through an appropriate transmission method (such as gear transmission, belt transmission, etc.) to ensure that the power can be smoothly and effectively transmitted from the drive unit 3 to the transmission unit body 2, thereby driving the entire toy car.

[0036] The transmission device body 2 is specifically composed of a drive lever 22, a conversion assembly 23, a first gear train assembly 24, and a second gear train assembly 25. The drive lever 22, as the core drive shaft of the transmission device body 2, runs through the entire body, enabling all components to work collaboratively under its drive to achieve speed conversion. The first gear train assembly 24, the conversion assembly 23, and the second gear train assembly 25 are sequentially inserted into the drive lever 22. This insertion method facilitates position adjustment and switching of each component on the drive lever 22, ensuring quick and accurate speed change operation under different driving requirements. The first gear train assembly 24 typically consists of multiple meshing or cooperating gears. Its design parameters and gear ratios allow it to effectively increase the toy car's speed when connected to the conversion assembly 23, thus accelerating the toy car. Conversely, the second gear train assembly 25, based on its gear configuration and transmission ratio, reduces the toy car's speed when connected to the conversion assembly 23, achieving a deceleration effect and meeting the speed control needs of the toy car in different scenarios. The conversion component 23 plays a crucial role in the speed change process. It uses a reasonable mechanical structure (such as a shift fork, clutch, or other common conversion structures) to switch between the first gear train component 24 and the second gear train component 25, thereby changing the power transmission path and transmission ratio, and thus controlling the acceleration or deceleration of the toy car. This makes the entire speed change process smooth and reliable, providing the toy car with a variety of speed options and enhancing its playability and functionality.

[0037] When the transmission is in acceleration mode, the conversion component 23 connects to the first gear train component 24. This connection allows power to be transmitted through the first gear train component 24, which is connected to the first output end 5 via the first transmission rod 51. In this way, after being converted by the first gear train component 24, the power is efficiently transmitted to the first output end 5, driving it to rotate rapidly, thus accelerating the toy car. The first output end 5, acting as the power wheel, provides strong driving force during acceleration, enabling the toy car to quickly increase its speed.

[0038] When the transmission is in deceleration mode, the conversion component 23 connects to the second gear train component 25. At this time, power is transmitted via the second gear train component 25 and connected to the second output end 6 via the second transmission rod 61. The design of the second gear train component 25 allows for adjustment of power transmission, reducing the wheel speed and achieving a deceleration effect. The second output end 6 plays a crucial role in the deceleration process; by controlling its speed, the toy car's speed can be stably reduced, ensuring a smooth and controllable deceleration process.

[0039] This design not only enables the toy car to accelerate and decelerate, but also ensures the stability and reliability of power transmission under different driving conditions through reasonable power transmission path distribution. It also provides the toy car with diverse driving mode options. By switching between the first gear train assembly 24 and the second gear train assembly 25 via the conversion component 23, the toy car can flexibly cope with different road conditions and usage needs, enhancing its playability and practicality.

[0040] In one embodiment, the first gear train assembly 24 includes a first driving gear train 241 and a first driven gear train 242; the first driving gear train 241 meshes with the first driven gear train 242; the first driving gear train 241 is disposed on the driving rod 22, and a first engaging portion 2411 is provided on the first driving gear train 241. The second gear train assembly 25 includes a second driving gear train 241 and a second driven gear train 252; the second driving gear train 241 meshes with the second driven gear train 252; the second driving gear train 241 is disposed on the driving rod 22, and a second engaging portion 2511 is provided on the second driving gear train 241.

[0041] Understandably, such as Figure 6 As shown, the first driving gear system 241 is precisely mounted on the driving rod 22. It is fixed to the driving rod 22 via a reliable mechanical connection to ensure that during high-speed rotation and power transmission, the first driving gear system 241 can rotate stably with the driving rod 22 without relative slippage or loosening, thus guaranteeing accurate power transmission. The first driving gear system 241 typically consists of one or more mating gears. The number of teeth, module, and other parameters of these gears are carefully designed and calculated to achieve a specific transmission ratio. Its main function is to initially transmit power from the driving rod 22 and change the transmission speed and torque according to the set transmission relationship, laying the foundation for the subsequent acceleration process. A first engaging part 2411 is cleverly provided on the first driving gear system 241. This first engaging part 2411 can be a slot, a block, or other structure with engaging function. Its main function is to cooperate with the conversion component 23. When acceleration is required, the conversion component 23 can precisely engage with the first engaging part 2411, thereby forming a tightly connected whole between the first driving gear system 241 and the conversion component 23. This ensures that power can be smoothly transmitted from the first driving gear system 241 to the conversion component 23, which in turn drives the first driven gear system 242 to work, realizing the acceleration function of the toy car. This engaging method is not only reliable but also facilitates quick switching between different driving modes.

[0042] The first driven gear system 242 meshes with the first driving gear system 241 and is typically mounted on another driven rod 26 parallel to the driving rod 22. It is fixed to the chassis frame 1 by bearings and other support structures to ensure high stability and precision during rotation and to maintain good meshing with the first driving gear system 241. The first driven gear system 242 consists of one or more gears, with a relatively larger number of teeth compared to the first driving gear system 241 (determined according to actual transmission ratio requirements). This allows it to achieve a speed reduction and torque increase effect when meshing with the first driving gear system 241 (because gears with more teeth have lower speeds and higher torque). When the first driving gear system 241 rotates, it drives the first driven gear system 242 to rotate through gear meshing, thereby transmitting power to subsequent transmission mechanisms (such as wheels), providing the toy car with sufficient driving force to accelerate.

[0043] The second driving gear system 241 is also precisely mounted on the driving rod 22, and a stable connection (such as a key connection) is used between them to ensure synchronous rotation during operation and effective power transmission. Its structure is similar to the first driving gear system 241, also composed of gears, but the number of teeth, module, and other parameters differ to meet different transmission ratio requirements. Its main function is to transmit the power of the driving rod 22 according to a different transmission relationship, serving the deceleration process of the toy car. A second engaging part 2511 is provided on the second driving gear system 241, which functions similarly to the first engaging part 2411, cooperating with the conversion component 23. When deceleration is required, the conversion component 23 engages with the second engaging part 2511, connecting the second driving gear system 241 and the conversion component 23 into a single unit, thereby transmitting power to the second driven gear system 252, thus achieving the deceleration function of the toy car. This snap-fit ​​design allows for quick and easy switching between different driving modes, ensuring smoothness and reliability during gear shifting.

[0044] The second driven gear system 252 meshes with the second driving gear system 241. The second driven gear system 252 is typically mounted on the driven rod 26 (it can share the same driven rod 26 as the first driven gear system 242, or they can be mounted on different driven rods 26, depending on the design layout). It is fixed to the chassis frame 1 by a suitable support structure to ensure stable rotation and maintain good meshing. The second driven gear system 252 consists of gears with fewer teeth than the second driving gear system 241 (determined according to the transmission ratio requirements). When meshing with the second driving gear system 241, it achieves the effect of increasing speed and reducing torque (because gears with fewer teeth have higher speed and lower torque). When the second driving gear system 241 rotates, it drives the second driven gear system 252 to rotate at high speed. However, due to the relatively reduced torque, the toy car's speed decreases, thus achieving deceleration to adapt to different driving scenarios and needs.

[0045] In one embodiment, the first driven gear train 242 is connected to the second driven gear train 252 via a driven rod 26.

[0046] The driven rod 26 can be made of high-strength, lightweight metal materials (such as aluminum alloy) or high-quality engineering plastics to ensure sufficient strength and rigidity during power transmission, preventing deformation or damage and thus ensuring the stability and reliability of power transmission. Its surface is finely machined, exhibiting good smoothness and wear resistance, reducing frictional loss during rotation and extending service life. The driven rod 26 is mounted parallel to the driving rod 22 on the chassis frame 1, supported by high-precision bearings at both ends, ensuring high stability and accuracy during rotation. The bearings are installed in pre-drilled holes in the chassis frame 1 and are securely connected to the chassis frame 1 using appropriate fixing methods (such as screws, retaining rings, etc.) to prevent axial movement or radial wobble of the driven rod 26 during operation, ensuring the parallelism between the driven rod 26 and the driving rod 22 and the accuracy of gear meshing. The first driven gear train 242 is tightly connected to one end of the driven rod 26 via a spline connection, key connection, or other reliable mechanical connection method. This connection method ensures that the first driven gear train 242 and the driven rod 26 can rotate synchronously without relative slippage, thus ensuring accurate power transmission. When the first driving gear train 241 rotates, it drives the first driven gear train 242 to rotate through meshing with it. Since the first driven gear train 242 is connected to the driven rod 26, it transmits power to the driven rod 26, causing it to start rotating. In this process, the driven rod 26 plays a crucial transitional role, transmitting the power of the first gear train assembly 24 to the subsequent second driven gear train 252.

[0047] The second driven gear train 252 is also connected to the other end of the driven rod 26 via a reliable mechanical connection. This connection not only ensures synchronous rotation between the second driven gear train 252 and the driven rod 26, but also facilitates the installation and removal of the second driven gear train 252 on the driven rod 26, making it convenient to repair or replace the gear train when needed. When the second driving gear train 241 rotates, it drives the second driven gear train 252 to rotate through meshing with it. Since the second driven gear train 252 is connected to the driven rod 26, the driven rod 26 transmits power to the second driven gear train 252, thereby realizing the transmission of power from the second gear train assembly 25 to the second driven gear train 252, providing power support for the toy car's deceleration.

[0048] Driven rod 26, acting as the link between the first driven gear train 242 and the second driven gear train 252, is a key component for power transmission in the entire transmission device 2. It transmits power from the first gear train assembly 24 to the second driven gear train 252, ensuring smooth power flow throughout the transmission system under different driving modes (acceleration or deceleration), allowing the toy car to accelerate or decelerate as needed. Due to the tight connection between driven rod 26 and the first and second driven gear trains 242 and 252, as well as the high-precision installation and stable rotation of driven rod 26 itself, power transmission is guaranteed to remain uninterrupted or unstable during gear changes. When the conversion assembly 23 switches between the first gear train assembly 24 and the second gear train assembly 25, driven rod 26 smoothly transfers power from one gear train to the other, achieving seamless switching and making the toy car's movement smoother and more fluid. The installation accuracy of driven rod 26 and the chassis frame 1 is crucial to the performance of the entire transmission device 2. During installation, it is necessary to precisely control parameters such as the parallelism between the driven rod 26 and the driving rod 22, the perpendicularity between the driven rod 26 and the chassis frame 1, and the meshing clearance between the driven rod 26 and the gear train. By using appropriate adjustment devices (such as adjusting nuts and shims), the position of the driven rod 26 can be fine-tuned to ensure the meshing accuracy and power transmission efficiency between the gear trains. The proper arrangement and installation of the driven rod 26 and its supporting structure enhances the overall strength and rigidity of the chassis frame 1. During the toy car's operation, especially during acceleration and deceleration, the driven rod 26 can withstand certain torque and bending moment, working together with the chassis frame 1 to ensure the stability and deformation resistance of the entire vehicle structure, thereby improving the toy car's service life and driving safety.

[0049] In one embodiment, the conversion component 23 includes a first switching part 231 and a second switching part 232; the conversion component 23 can selectively engage the first switching part 231 with the first engaging part 2411 or engage the second switching part 232 with the second engaging part 2511 by axial sliding, thereby realizing the switching of power between the first gear train assembly 24 and the second gear train assembly 25.

[0050] Understandably, such as Figure 3 and Figure 6 As shown, the conversion assembly 23 includes a first switching part 231 and a second switching part 232, both of which can slide together along the axial direction of the drive rod 22, but can also independently engage with the first engaging part 2411 and the second engaging part 2511 respectively. The first switching part 231 and the second switching part 232 are typically made of high-strength, wear-resistant materials, such as engineering plastics or alloys, to ensure good durability and reliability during frequent switching. Their shape and size are adapted to the first engaging part 2411 and the second engaging part 2511 to achieve precise engagement. The conversion assembly 23 is integrally mounted on the drive rod 22 and is connected to the drive rod 22 through an appropriate sliding fit structure (such as a sliding spline, sliding key, etc.). This ensures that the conversion assembly 23 can slide freely along the axial direction of the drive rod 22 and can also rotate synchronously with the drive rod 22 in the circumferential direction. Thus, during power switching, the conversion assembly 23 can rotate together with the drive rod 22, driving the entire transmission device body 2 to work.

[0051] When no power switching occurs, the conversion assembly 23 is in its initial position. At this time, neither the first switching part 231 nor the second switching part 232 engages with the first engaging part 2411 or the second engaging part 2511, and the entire transmission device body 2 is in a standby state, not transmitting power. At this time, the drive lever 22 rotates freely under the drive of the drive device 3, while neither the first gear train assembly 24 nor the second gear train assembly 25 participates in power transmission.

[0052] When acceleration is required, an external control device (such as a remote control or button) sends a signal to drive the conversion assembly 23 to slide axially along the drive rod 22, causing the first switching part 231 to move closer to the first engaging part 2411. During the sliding process, the conversion assembly 23 and the drive rod 22 rotate synchronously to ensure smooth engagement. After the first switching part 231 contacts the first engaging part 2411, under the action of mutually cooperating structures (such as the cooperation of a locking block and a locking slot), the first switching part 231 and the first engaging part 2411 achieve a tight engagement, forming a whole. At this time, the power of the drive rod 22 is transmitted to the conversion assembly 23 (first switching part 231) through the first drive gear system 241, and then transmitted to the first driven gear system 242 through the conversion assembly 23, realizing the transmission of power from the first gear system assembly 24 to the driven rod 26, driving the wheels and other drive components to rotate faster, thus accelerating the toy car.

[0053] When deceleration is required, the external control device sends a signal to drive the conversion component 23 to slide in the opposite direction along the axis of the drive rod 22, causing the second switching part 232 to move closer to the second engaging part 2511. During the sliding process, the conversion component 23 continues to rotate synchronously with the drive rod 22, ensuring smooth engagement. After the second switching part 232 contacts the second engaging part 2511, they engage tightly under the action of their mutually cooperating structures, forming a whole. At this time, the power of the drive rod 22 is transmitted to the conversion component 23 (second switching part 232) through the second drive gear system 241, and then to the second driven gear system 252 through the conversion component 23, realizing the transmission of power from the second gear system component 25 to the driven rod 26. However, due to the design of the second gear system component 25, deceleration is achieved during power transmission, causing the wheels and other drive components to rotate at a slower speed, thus slowing down the toy car.

[0054] In one embodiment, the number of gears in the second drive gear train 241 is greater than the number of gears in the first drive gear train 241.

[0055] The increased number of gears results in more gear meshing during power transmission. This not only disperses the impact force during power transmission but also makes the deceleration process smoother. When simulating the deceleration and braking of real vehicles, this design can better simulate the deceleration behavior of real vehicles, providing a more realistic driving experience. More gears also increase torque output. During deceleration, although the speed decreases, the increased torque ensures that the toy car still has sufficient driving force at low speeds, preventing the vehicle from stalling due to excessively low speed. Simultaneously, during acceleration, the fewer gears in the first gear train assembly 24 can ensure higher rotational speeds, thus achieving rapid acceleration response. By optimizing the distribution of gear numbers, mechanical wear caused by power transmission impact is reduced. More gears distribute the pressure of power transmission, reducing the load on individual gears, thereby extending the service life of the gears and improving the reliability of the entire transmission unit 2.

[0056] In one embodiment, the conversion assembly 23 further includes: a lever 233 fixed to the chassis frame 1; a fixed rod 234; a sliding member with a bushing 2351 sleeved on the fixed rod 234, allowing the sliding member to slide relative to the fixed rod 234; and a connecting rod 236 connecting the lever 233 and the sliding member. The sliding member is embedded between the first switching part 231 and the second switching part 232, and the lever 233 drives the sliding member to slide along the fixed rod 234 via the connecting rod 236, thereby driving the first switching part 231 and the second switching part 232 to slide axially.

[0057] The lever 233 is fixed to the chassis frame 1, serving as the starting point for the operation of the entire transmission body 2. The lever 233 can be designed in various shapes, such as the common rod-shaped, plate-shaped, or crank-shaped, to meet different operational needs and spatial layouts. Its fixing method can be threaded connection, welding, or snap-fit, ensuring it will not loosen or shift during operation. The position and angle of the lever 233 can also be optimized according to ergonomic principles for user convenience. The fixing rod 234 provides a sliding track for the sliding component, ensuring that the sliding component moves along a predetermined path. The fixing rod 234 is typically made of rigid materials, such as metal or high-strength plastic, to withstand the friction and pressure generated by the sliding component during sliding. Its surface is finely machined, possessing good straightness and smoothness, reducing sliding resistance and extending service life.

[0058] A bushing 2351 is provided on the sliding member, and the bushing 2351 is fitted onto the fixed rod 234, allowing the sliding member to slide relative to the fixed rod 234. The sliding member is usually made of wear-resistant material, such as engineering plastic or metal alloy, to withstand frequent sliding friction. During sliding, the sliding member is in close contact with the fixed rod 234, while maintaining an appropriate distance and contact with the first switching part 231 and the second switching part 232. The sliding member plays a key transmission role in the conversion assembly 23. When the lever 233 is operated, the sliding member slides on the fixed rod 234, driving them to slide axially through contact and interaction with the first switching part 231 and the second switching part 232. This sliding transmission method has the advantages of simple structure, convenient operation, and stable transmission. A connecting rod 236 connects the lever 233 and the sliding member, serving as a transmission link between the two. Its length and shape can be adjusted according to the actual layout to ensure that power can be effectively transmitted when the lever 233 is operated, driving the sliding member to slide along the fixed rod 234.

[0059] When the user operates the lever 233, the lever 233 drives the slider 235 to slide along the fixed rod 234 via the connecting rod 236. The slider 235 is embedded between the first switching part 231 and the second switching part 232, so the sliding of the slider 235 will drive the first switching part 231 and the second switching part 232 to slide axially. In this way, the conversion assembly 23 can selectively engage the first switching part 231 with the first engaging part 2411, or engage the second switching part 232 with the second engaging part 2511, thereby realizing the switching of power between the first gear train assembly 24 and the second gear train assembly 25.

[0060] In one embodiment, a shock-absorbing device 4 is connected below the drive device 3, and the shock-absorbing device 4 is used to protect the drive device 3. The drive device 3 is a motor.

[0061] The shock absorber 4 uses a high-strength coil spring 41 made of fatigue-resistant alloy steel, capable of withstanding repeated compression and tension forces. The stiffness of the spring 41 is precisely calculated to provide sufficient support while effectively absorbing impact energy when encountering bumps. The outer surface of the spring 41 is treated with anti-corrosion coating to ensure good performance under various environmental conditions. Rubber buffer pads or elastic sleeves are respectively installed at the upper and lower ends of the shock absorber 4. These elastic connectors not only further absorb vibrations but also provide insulation and soundproofing, reducing noise transmission and improving the overall comfort and quietness of the toy car.

[0062] When the toy car travels on uneven surfaces, the wheels experience impact forces from the ground. These impact forces are transmitted through the wheels to the shock absorber 4. The spring 41 assembly initially buffers the impact force, converting some of the impact energy into the elastic potential energy of the spring 41. Subsequently, the shock absorber takes effect, further dissipating and attenuating the remaining vibration energy through internal oil flow or gas compression. The elastic connector plays a supporting role in shock absorption and sound insulation throughout the process, ensuring that only minor vibrations are transmitted to the drive unit 3, thereby effectively protecting the drive unit 3 from damage.

[0063] The shock absorber 4 is connected to the bottom of the drive unit 3 via a sturdy bracket. The bracket is made of high-strength aluminum alloy, ensuring a secure connection without adding excessive weight. The connection is typically secured with bolts or screws and equipped with anti-loosening washers to prevent loosening during vibration. The other end of the shock absorber 4 is connected to the chassis frame 1, usually via an elastic sleeve or ball joint. This connection method allows the shock absorber 4 some room for movement when subjected to impacts from different directions, while maintaining overall stability and ensuring effective shock absorption. By buffering and absorbing impacts from the road surface, the shock absorber 4 effectively reduces the stress and vibration amplitude experienced by the drive unit 3, reducing the risk of component damage and malfunction due to vibration, thereby extending the service life of the drive unit 3. The cushioning effect of the shock absorber 4 helps maintain the stability of the toy car during driving, ensuring good contact between the wheels and the ground, improving grip, reducing directional deviation and speed fluctuations caused by vibration, and ensuring the toy car can travel smoothly on various road surfaces. This allows the toy car to better adapt to different road conditions. On flat surfaces, the first gear train assembly 24 can be used to achieve fast travel; on rough or rough surfaces that require fine control, the additional number of gears in the second gear train assembly 25 can provide stable low-speed travel capability, enhancing the toy car's passability and adaptability.

[0064] In one embodiment, when the transmission accelerates, the drive device 3 drives the first gear train assembly 24 via the conversion component 23, and the first gear train assembly 24 drives the first transmission rod 51 to rotate, thereby causing the first output end 5 to rotate; the first output end 5 is the rear wheel; when the transmission decelerates, the drive device 3 drives the second gear train assembly 25 via the conversion component 23, and the second gear train assembly 25 drives the second transmission rod 61 to rotate, thereby causing the second output end 6 to rotate; the first output end 5 is the front wheel.

[0065] Specifically, when acceleration is needed, the conversion component 23 is activated, engaging the first switching part 231 with the first engaging part 2411. After this action, the power generated by the drive device 3 is transmitted through the first gear train assembly 24, driving the first transmission rod 51 to rotate, thereby driving the rear wheel (first output end 5) to rotate at high speed, achieving the acceleration effect. In deceleration mode, the conversion component 23 engages the second switching part 232 with the second engaging part 2511. Subsequently, the power of the drive device 3 is transmitted through the second gear train assembly 25, driving the second transmission rod 61 to rotate, causing the front wheel (second output end 6) to rotate at a lower speed, achieving deceleration. This design not only realizes the acceleration and deceleration functions of the toy car, but also ensures the stability and reliability of power transmission under different driving conditions through reasonable power transmission path allocation, while also providing the toy car with diverse driving mode options.

[0066] Other structures of the speed change device described in this embodiment are referred to in the prior art.

[0067] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A gear shift device for a toy vehicle, characterized by, Includes the transmission unit and the drive unit; The transmission device body includes a drive lever, a conversion assembly, a first gear train assembly, and a second gear train assembly; The first gear train assembly, the conversion assembly, and the second gear train assembly are sequentially inserted into the drive rod; The output end of the drive device is connected to the input end of the drive rod; When the first gear train assembly is connected to the conversion assembly, the drive rod drives the first gear train assembly to rotate, and the first gear train assembly is connected to the first output end through the first transmission rod, and the speed change device is in an acceleration state. When the second gear train assembly is connected to the conversion assembly, the drive rod drives the second gear train assembly to rotate, and the second gear train assembly is connected to the second output end through the second transmission rod, and the speed change device is in a deceleration state.

2. The speed transmission device for a toy car according to claim 1, characterized in that: The first gear train assembly includes a first driving gear train and a first driven gear train; The first driving gear system meshes with the first driven gear system; The first drive gear system is disposed on the drive rod, and the first drive gear system is provided with a first engaging part.

3. The transmission device for a toy car according to claim 2, characterized in that: The second gear train assembly includes a second driving gear train and a second driven gear train; The second driving gear system meshes with the second driven gear system; The second drive gear system is disposed on the drive rod, and the second drive gear system is provided with a second engaging part.

4. A speed-changing device according to claim 3, characterized in that: The conversion component includes a first switching unit and a second switching unit; The conversion component can selectively engage the first switching part with the first engaging part or the second switching part with the second engaging part by axial sliding, thereby realizing the switching of power between the first gear train assembly and the second gear train assembly.

5. The transmission device for a toy car according to claim 3, characterized in that: The first driven gear system is connected to the second driven gear system via a driven rod.

6. The transmission device for a toy car according to claim 3, characterized in that: The number of gears in the second driving gear system is greater than the number of gears in the first driving gear system.

7. A gear shift for a toy vehicle as defined in claim 4, wherein The conversion assembly also includes a lever, a fixed lever, a slider, and a connecting rod; The sliding member is provided with a bushing, which is sleeved on the fixed rod, so that the sliding member can slide relative to the fixed rod; The connecting rod connects the lever and the sliding member; The sliding member is embedded between the first switching part and the second switching part, and the lever drives the sliding member to slide along the fixed rod through the connecting rod, thereby driving the first switching part and the second switching part to slide axially.

8. The speed transmission device for a toy car according to claim 1, characterized in that: A shock-absorbing device is connected below the drive unit, and the shock-absorbing device is used to protect the drive unit.

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