Transmission mechanism of an interactive intelligent toy

Abstract

The application relates to the technical field of toys, in particular to a transmission mechanism of an interactive intelligent toy, which comprises a motor, a support and a base, the motor and the support are fixedly installed on the upper surface of the base; the transmission mechanism further comprises a rear wheel transmission assembly and a front wheel transmission assembly; when the rear wheel is empty and the toy is stuck, the compression spring pushes the friction wheel and the friction disc to extrude and perform friction transmission, so that power is transmitted to the front wheel transmission assembly; when the power is transmitted to the front wheel through gear transmission, the driving of the rear wheel is disconnected through the elastic force of the return spring and the compression spring, so that the intelligent toy car is automatically changed into front wheel driving according to the use condition, the intelligent toy car is prevented from being stuck and overturned, the intelligent toy car runs more stably, the power consumption is reduced, the structure is simple, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of toy technology, and more specifically to a transmission mechanism for an interactive intelligent toy. Background Technology

[0002] Interactive smart toys refer to toys that respond to actions performed by people. Voice-controlled smart toy cars are among the most common interactive smart toys. The transmission mechanisms of existing voice-controlled smart toy cars are generally divided into four-wheel drive transmission mechanisms and rear-wheel drive transmission mechanisms.

[0003] Existing toy four-wheel drive vehicles maintain four-wheel drive throughout the entire driving process, with the motor output torque distributed to the front and rear wheels in a fixed ratio, resulting in good handling performance. However, they cannot adjust the torque distribution according to road conditions during use, and they consume a lot of power and electricity.

[0004] Existing rear-wheel drive toy cars have transmission mechanisms that allow the front wheels to focus on steering, making them more agile when turning, with even weight distribution between the front and rear, resulting in good handling stability and smooth driving, and also helping to extend tire life. Furthermore, the rear-wheel drive transmission simplifies the layout of the control mechanism and the structure of the steering mechanism, making maintenance easier. However, when a rear-wheel drive car is cornering, the center of gravity shifts forward due to deceleration, reducing the grip of the rear wheels and making it prone to oversteer. Or, if the rear wheels do not contact the ground due to uneven road surfaces, the toy car loses its driving force, which can easily lead to jamming or rollover.

[0005] In view of the above, in order to overcome the above technical problems, the present invention designs a transmission mechanism for an interactive intelligent toy, which solves the above technical problems. Summary of the Invention

[0006] The technical problem to be solved by this invention is that the transmission mechanism of existing interactive intelligent toy cars is difficult to control the driving of the wheels according to the road conditions, which makes the toy cars consume more electricity and prone to tipping over, affecting the normal use of the toy cars and also affecting the lifespan of the toys.

[0007] To address the above problems, the present invention provides the following technical solution:

[0008] The present invention provides a transmission mechanism for an interactive smart toy, comprising a motor, a bracket, and a base, wherein the motor and the bracket are fixedly mounted on the upper surface of the base; it also includes a rear wheel transmission assembly and a front wheel transmission assembly, wherein the rear wheel transmission assembly transmits power to the front wheel transmission assembly through friction transmission when the rear wheel is airborne and the toy is stuck, and the front wheel transmission assembly transmits power to the front wheel through gear transmission while simultaneously disconnecting the drive of the rear wheel by the elastic force of a spring.

[0009] The motor is connected to the rear wheel drive assembly, enabling the intelligent toy car of this invention to control the rear wheel drive via a voice system during normal use. The rear wheel drive simplifies the structure of the transmission and steering mechanisms, making the intelligent toy car more agile when turning, stable in handling, and smooth in driving. The front wheel drive assembly automatically switches to front wheel drive when the rear wheels of the toy car cannot drive the front wheels to turn, making the toy car easier to operate and maintain, with low manufacturing costs, and more energy-efficient during use.

[0010] The rear wheel drive assembly includes a return spring, an internal meshing spur gear, a transmission spur gear, a rear transmission bevel gear, a rear wheel bevel gear, a rear wheel rod, a rear drive rod, and a friction disc. The return spring is engaged between the internal meshing spur gear and the transmission spur gear, allowing the transmission spur gear to slide while meshing inside the internal meshing spur gear. The rear transmission bevel gear generates friction by pressing against the transmission spur gear, causing the rear transmission bevel gear to rotate while simultaneously driving two rear wheel bevel gears with opposite axes, the same module, but different diameters to rotate, thereby driving the two rear wheel rods to rotate with the same transmission ratio. The connection between the rear wheel rod and the bracket is symmetrically provided with limiting blocks to prevent the rear wheel rod from sliding. The end of the rear drive rod is rotatably connected to the rear transmission bevel gear on the same axis, and the other end of the rear drive rod is fixedly mounted with a friction disc that transmits the rear wheel drive to the front wheel.

[0011] A limiting block is installed at the rotatable connection between the rear wheel rod and the bracket. This prevents the rear wheel rod from sliding left and right during the toy car's forward movement, thus avoiding interference with the meshing transmission between the rear drive bevel gear and the rear wheel bevel gear. A layer of high-friction material such as asbestos, leather, rubber, plastic, or fiber is adhered to the working surface of the drive spur gear near the rear drive bevel gear. Similarly, a layer of high-friction material is adhered to the side of the rear drive bevel gear closest to the drive spur gear. This generates significant friction when the return spring pushes the drive spur gear and the rear drive bevel gear into contact and compress, achieving frictional transmission. Torque is transmitted through friction, preventing slippage of the rear wheel drive assembly when overloaded. This ensures safe, stable, and efficient transmission, and facilitates assembly.

[0012] The rear drive bevel gear is rotatably connected to the rear drive rod, and a connecting rod is fixedly installed between the two rear drive bevel gears. The connecting rod is hollow cylindrical in shape, and its length is equal to the sum of the radii of the two rear drive bevel gears, so that the two rear drive bevel gears mesh with the two rear drive bevel gears respectively.

[0013] The two rear bevel gears are axially opposite but have different diameters. When the toy car moves forward, the two rear transmission bevel gears mesh with the two rear wheel bevel gears respectively, so that the rear wheel rods on both sides of the rear transmission bevel gears rotate with the rear wheel bevel gears without interfering with the rotation of the front transmission rod. The two rear wheel bevel gears have the same module, so the rotation frequency of the rear wheel rods on both sides is the same.

[0014] A circular stop is provided on the side of the internal meshing spur gear near the motor. The diameter of the circular stop is equal to the outer diameter of the internal meshing spur gear. The inner side of the circular stop is limited to the transmission spur gear inside the internal meshing spur gear by the elastic force of the return spring.

[0015] When the motor drives the internal meshing spur gear to rotate, the transmission spur gear and the internal meshing spur gear rotate and mesh coaxially. The width of the internal meshing spur gear is longer than that of the transmission spur gear, providing space for the sliding of the transmission spur gear. A circular stop is set on the side of the internal meshing spur gear closest to the motor, so that the motor can be fixedly connected to the circular stop to provide rotational torque to the internal meshing spur gear. The inner side of the circular stop is engaged with one end of the return spring, which can provide pressure to the return spring. After the thrust on the transmission spur gear disappears, the elastic force of the return spring causes the transmission spur gear to return to its original position and squeeze against the rear transmission bevel gear, achieving the effect of friction transmission.

[0016] A push rod is installed inside the rear transmission rod, and a rectangular protrusion is provided on the outer wall of the push rod. A cylindrical groove for sliding of the push rod is opened inside the rear transmission rod, and a rectangular groove is opened on the outer side of the rear transmission rod. The rectangular groove and the rectangular protrusion cooperate to limit the sliding and rotation of the push rod in the rear transmission rod.

[0017] One end of the push rod is fixedly connected to the transmission spur gear, so that while the push rod slides in the cylindrical groove of the rear transmission rod, it drives the transmission spur gear to slide in the internal meshing spur gear, and the push rod rotates with the rotation of the transmission spur gear; the rectangular protrusion on the outer wall of the push rod can be locked in the rectangular groove of the rear transmission rod to drive the rear transmission rod to rotate, so that the rotation of the rear transmission rod is synchronized with the drive of the motor, and is not affected when switching between rear wheel and front wheel drive.

[0018] The friction disc has a guide groove inside for guiding the front wheel drive assembly, and a push groove is provided at the bottom of the friction disc. The push groove communicates with the cylindrical slide groove, so that the front wheel drive assembly enters the cylindrical slide groove under the guidance of the push groove, thereby pushing the push rod to disconnect the transmission path of the rear wheel drive assembly.

[0019] The guide groove and push groove of the friction disc guide the front wheel drive assembly, preventing it from dislodging from its original position when the toy car is subjected to external force and vibrates, thus preventing the friction transmission path of the front wheel drive assembly from failing and causing the push rod to be unable to receive the thrust of the front wheel drive assembly when switching drive modes. The bottom surface of the inner wall of the guide groove of the friction disc is made of a material with high friction, allowing the friction disc to conduct friction transmission with the front wheel drive assembly through the guide groove, realizing the conversion between front-wheel drive and rear-wheel drive.

[0020] The front wheel drive assembly includes a front wheel rod, universal joints, a front wheel bevel gear, a front drive bevel gear, a front drive rod, a friction wheel, a fixed wheel, and a compression spring. Universal joints for steering are installed at both ends of the front wheel rod. The two front wheel rods are fixedly connected to two front wheel bevel gears with opposite axial directions, the same module, but different diameters. The two front drive bevel gears mesh with the two front wheel bevel gears. A friction wheel is slidably mounted on the end of the front drive rod near the rear drive device. The diameter of the friction wheel is the same as the diameter of the guide groove. A rectangular groove for the friction wheel to slide is provided on the outer side of the front drive rod. An iron ring is fixedly installed on the side of the fixed wheel near the friction wheel. The compression spring is engaged between the fixed wheel and the friction wheel, and the spring force pushes the friction wheel against the friction disc, causing the friction wheel and friction disc to transmit power under friction.

[0021] The front drive bevel gear is fixedly connected to the front drive rod, allowing it to transmit torque to the front drive rod when the front wheel is rotating. When the front wheel has no torque, it transmits the torque from the front drive rod to the front drive bevel gear, causing the bevel gear to drive the front wheel rod and the front wheel to rotate coaxially, thus achieving front wheel drive. The diameter of the friction wheel is the same as the diameter of the guide groove, allowing the friction wheel to slide and transmit power within the guide groove. If the diameter is too small, the toy car will deviate from its central position when subjected to external forces and vibrations, changing the transmission ratio of the friction drive and affecting the transmission. The mechanism operates normally; the compression spring, which is engaged between the fixed wheel and the friction wheel, provides a driving force to the friction wheel when the rear wheel switches to front wheel drive, satisfying the pressure required for friction transmission. This allows the motor's drive to be transmitted to the front wheel, preventing the toy car from tipping over when it makes a sharp turn or goes downhill and its rear end is airborne, causing the rear wheel to spin freely while the front wheel stops due to lack of driving force. The outer side of the compression spring is fitted with a silicone sleeve to prevent interference with the connection between the fixed wheel and the friction wheel under magnetic force when the rear wheel is in drive mode, thus achieving the effect of automatically switching between front and rear wheel drive.

[0022] A push rod is coaxially mounted on the side of the friction wheel near the friction disc. The diameter of the push rod is the same as the diameter of the push groove, and the length of the push rod is greater than the depth of the push groove. When the push rod slides under the guidance of the push groove, it pushes the push rod in the cylindrical slide groove to slide in the same direction.

[0023] The material on the side of the friction wheel closest to the friction disc is also a material with high friction, which can better achieve the effect of friction transmission and slip under overload, preventing the toy car from lurching forward and tipping over when the front wheel drive is overloaded, thus protecting the intelligent toy car. The diameter of the push rod is the same as the diameter of the push groove, which can better realize the guiding function of the push groove, so that the center of the push rod and the friction wheel are accurately positioned in the push groove and guide groove of the friction disc. This prevents the friction wheel from deviating from the center position when the toy car is subjected to external forces and vibrations, which would change the transmission ratio of friction transmission and affect the transmission process of the front wheel drive assembly.

[0024] An annular electromagnet is fixedly installed on the other side of the friction wheel, and a sliding rod is fixedly installed at the center of the same side of the friction wheel. The sliding rod has a cylindrical groove with the same diameter as the front drive rod inside. A rectangular protrusion is provided inside the cylindrical groove. The sliding rod slides on the outside of the front drive rod under the limiting action of the rectangular protrusion, so that the friction wheel and the front drive rod rotate synchronously.

[0025] The sum of the height of the annular electromagnet and the height of the iron ring mounted on the fixed plate is greater than the height of the sliding rod mounted on the friction wheel. This allows the annular electromagnet and the iron ring to connect under magnetic force during rear-wheel drive, thereby fixing the friction wheel and disconnecting the transmission path between the friction wheel and the rear-wheel drive assembly. The sliding distance of the rectangular protrusion in the sliding rod within the rectangular groove is greater than the distance from the end of the friction wheel closest to the friction disc to the bottom of the guide groove when the friction wheel is connected to the fixed wheel. This allows the friction wheel to contact and press against the friction disc under the elastic force of the compression spring, without being affected by other limiting structures.

[0026] A copper coil is installed in the middle of the outer wall of the front drive rod. A ring magnet is sleeved on the outside of the copper coil. The ring magnet is fixedly connected to the base. The copper coil controls the ring electromagnet to be energized by rotating inside the ring magnet, thereby controlling the connection between the friction disc and the fixed wheel.

[0027] A closed copper coil is fixedly installed on the outer wall of the front drive rod, and a ring magnet is sleeved on the outside of the copper coil. The two ends of the copper coil are connected to the input and output ends of the ring electromagnet, respectively. When the toy car is moving normally, the rear wheel drive drives the front wheel to rotate, so that the copper coil stably generates current. When the rear wheel is lifted off the ground and the driving force of the front wheel disappears and stops rotating, the copper coil stops generating current, thus automatically changing the driving mode of the intelligent toy car. This eliminates the complex structure of conventional drive mode switching, and increases the endurance of the intelligent toy car while saving manufacturing costs. It also achieves the effect of automatically controlling the change of driving mode according to the actual movement of the toy car.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The transmission mechanism of the interactive smart toy of the present invention, when passing through uneven roads or slipping when turning, the compression spring in the front wheel transmission assembly pushes the friction wheel and the friction disc to squeeze and transmit power, so that the smart toy car automatically switches to front-wheel drive according to the usage situation, preventing the smart toy car from getting stuck and overturning, making the smart toy car drive more stably, reducing power consumption, and having a simple structure that reduces manufacturing costs.

[0030] 2. In the transmission mechanism of an interactive smart toy of the present invention, when switching from front-wheel drive to rear-wheel drive, the push rod on the friction disc wheel will push the push rod to disconnect the transmission path in the rear-wheel drive assembly. Without changing the output torque of the motor, the rear-wheel drive of the smart toy car will automatically switch to front-wheel drive, which is efficient, saves power, and increases the range of the smart toy car.

[0031] 3. The front wheel transmission assembly and the rear wheel transmission assembly of the transmission mechanism of the interactive smart toy of the present invention transmit torque by means of friction between the friction structure, so that the transmission mechanism can slip when overloaded, which plays a protective role, is safe, stable and efficient, and easy to assemble. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0034] Figure 1 This is a schematic diagram of the toy's exterior according to the present invention;

[0035] Figure 2 This is a schematic diagram of the present invention;

[0036] Figure 3 This is a schematic diagram of the rear wheel drive assembly of the present invention;

[0037] Figure 4 This invention is in Figure 3 A cross-sectional view along the AA direction;

[0038] Figure 5 This invention is in Figure 4 A magnified view of position B in the middle;

[0039] Figure 6 This is a schematic diagram of the front wheel drive assembly of the present invention;

[0040] Figure 7 This invention is in Figure 6 A cross-sectional view along the CC direction;

[0041] Figure 8 This invention is in Figure 7 A magnified view of position D in the middle;

[0042] Figure 9This is a schematic diagram of the rear wheel drive assembly and the front wheel drive assembly of the present invention in front wheel drive mode;

[0043] Figure 10 This invention is in Figure 9 A cross-sectional view along the EE direction;

[0044] Figure 11 This invention is in Figure 10 A magnified view of position F in the middle.

[0045] In the diagram: 1. Motor; 2. Bracket; 3. Base; 4. Rear wheel drive assembly; 41. Return spring; 42. Internal meshing spur gear; 421. Circular stop; 43. Drive spur gear; 44. Rear drive bevel gear; 441. Connecting rod; 45. Rear wheel bevel gear; 46. Rear wheel rod; 47. Rear drive rod; 471. Push rod; 4711. Rectangular protrusion; 472. Cylindrical groove; 473. Rectangular groove; 48. Friction disc; 481. Guide groove; 4 82. Push groove; 5. Front wheel drive assembly; 51. Front wheel rod; 52. Universal joint; 53. Front wheel bevel gear; 54. Front drive bevel gear; 55. Front drive rod; 551. Rectangular groove; 552. Copper coil; 553. Ring magnet; 56. Friction wheel; 561. Push rod; 562. Ring electromagnet; 563. Sliding rod; 5631. Cylindrical groove; 5632. Rectangular protrusion; 57. Fixed wheel; 571. Iron ring; 58. Compression spring. Detailed Implementation

[0046] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figure 1 and Figure 2 As shown, a transmission mechanism for an interactive smart toy includes a motor 1, a bracket 2, and a base 3. The motor 1 and the bracket 2 are fixedly mounted on the upper surface of the base 3. It also includes a rear wheel transmission assembly 4 and a front wheel transmission assembly 5. When the rear wheel is airborne and the toy is stuck, the rear wheel transmission assembly 4 transmits power to the front wheel transmission assembly 5 through friction transmission. The front wheel transmission assembly 5 transmits power to the front wheel through gear transmission while simultaneously disconnecting the drive of the rear wheel through the elastic force of a spring.

[0048] When in normal use, the intelligent toy car is controlled by a voice system to start the motor 1. The motor 1 is connected to the rear wheel transmission assembly 4, and the motor 1 drives the rear wheel to rotate under the transmission action of the rear wheel transmission assembly 4. When the rear wheel of the toy car cannot drive the front wheel to rotate, the front wheel transmission assembly 5 and the rear wheel transmission assembly 4 transmit the torque of the motor 1 to the front wheel through friction. Throughout the process, the rear wheel transmission assembly 4 and the front wheel transmission assembly 5 are fixed on the bracket 2. The entire transmission mechanism is simple, making the toy car easy to operate and maintain, with low manufacturing cost, and more energy-efficient during use.

[0049] like Figure 3 and Figure 4 As shown, the rear wheel drive assembly 4 includes a return spring 41, an internal meshing spur gear 42, a transmission spur gear 43, a rear transmission bevel gear 44, a rear wheel bevel gear 45, a rear wheel rod 46, a rear drive rod 47, and a friction disc 48. The return spring 41 is engaged between the internal meshing spur gear 42 and the transmission spur gear 43, allowing the transmission spur gear 43 to slide while meshing internally with the internal meshing spur gear 42. The rear transmission bevel gear 44 generates friction by pressing against the transmission spur gear 43, causing the rear transmission bevel gear 44 to rotate while simultaneously driving two rear wheel bevel gears 45 with opposite axes, the same module, but different diameters, to rotate, thereby driving the two rear wheel rods 46 to rotate with the same transmission ratio. The rear wheel rod 46 is symmetrically provided with limiting blocks at the connection between it and the bracket 2 to prevent the rear wheel rod 46 from sliding. The end of the rear drive rod 47 is rotatably connected to the rear transmission bevel gear 44 on the same axis, and the other end of the rear drive rod 47 is fixedly mounted with a friction disc 48 that transmits the rear wheel drive to the front wheel.

[0050] During normal operation of the toy car, the internal meshing spur gear 42 rotates, driving the coaxial transmission spur gear 43 to mesh and rotate. The elastic force of the return spring 41 pushes the transmission spur gear 43 to contact and squeeze with the rear transmission bevel gear 44. After squeezing, a large frictional force is generated to realize the frictional transmission between the transmission spur gear 43 and the rear transmission bevel gear 44. The limiting block limits the rear wheel rod 46 in the bracket 2, fixing the position of the rear transmission bevel gear 44. The rotation of the rear transmission bevel gear 44 drives the meshing rear wheel bevel gear 45 to rotate, which in turn drives the rear wheel rod 46 to rotate, causing the rear wheel of the toy car to rotate. At the same time, the rear transmission rod 47 and the friction disc 48 also rotate together with the transmission spur gear 43.

[0051] The surface of the spur gear 43 near the rear bevel gear 44 is coated with a material with high friction, such as asbestos, leather, rubber cloth, plastic or fiber material. The rear bevel gear 44 is also coated with a material with high friction on the side close to the spur gear 43. This allows the rear wheel drive assembly 4 to transmit torque by friction, causing the rear wheel drive assembly 4 to slip when overloaded, thus achieving safe, stable and efficient transmission, and facilitating assembly.

[0052] The rear drive bevel gear 44 is rotatably connected to the rear drive rod 47. A connecting rod 441 is fixedly installed between the two rear drive bevel gears 44. The connecting rod 441 is hollow cylindrical in shape. The length of the connecting rod 441 is equal to the sum of the radii of the two rear wheel bevel gears 45, so that the two rear drive bevel gears 44 mesh with the two rear wheel bevel gears 45 respectively.

[0053] When the toy car is in normal operation, the surfaces with high friction between the transmission spur gear 43 and the rear transmission bevel gear 44 transmit power through friction. The connecting rod 441 connects the two rear wheel bevel gears 45, so that the rotation of the transmission spur gear 43 drives the two rear transmission bevel gears 44 to rotate. The two rear transmission bevel gears 44 mesh with the two rear wheel bevel gears 45 with opposite axes, the same module but different diameters, so that the two rear wheel bevel gears 45 rotate with the same transmission ratio, driving the two rear wheels to rotate in the same frequency and direction.

[0054] like Figure 5 and Figure 10 As shown, a circular stop 421 is provided on the side of the internal meshing spur gear 42 near the motor 1. The diameter of the circular stop 421 is equal to the outer diameter of the internal meshing spur gear 42. The inner side of the circular stop 421 is limited to the transmission spur gear 43 inside the internal meshing spur gear 42 by the elastic force of the return spring 41.

[0055] Motor 1 drives the circular stop 421 of the internal meshing spur gear 42 to rotate, thereby driving the transmission spur gear 43, which rotates coaxially with the internal meshing spur gear 42, to rotate. When the rear wheels of the toy car are driven, the elastic force of the return spring 41 pushes the transmission spur gear 43 to slide in the internal meshing spur gear 42 and squeeze with the rear transmission bevel gear 44 for friction transmission. When the rear wheels of the toy car do not contact the ground during the driving process, causing the front wheels to stop rotating, the transmission spur gear 43 is subjected to a thrust greater than the elastic force of the return spring 41, causing the transmission spur gear 43 to slide in the internal meshing spur gear 42. The transmission spur gear 43 loses contact with the rear transmission bevel gear 44, thus breaking the transmission path of the rear wheels.

[0056] like Figure 6 , Figure 9 and Figure 10 As shown, a push rod 471 is installed inside the rear transmission rod 47, and a rectangular protrusion 4711 is provided on the outer wall of the push rod 471. A cylindrical groove 472 for sliding of the push rod 471 is opened inside the rear transmission rod 47, and a rectangular groove 473 is opened on the outer side of the rear transmission rod 47. The rectangular groove 473 and the rectangular protrusion 4711 cooperate to limit the sliding and rotation of the push rod 471 inside the rear transmission rod 47.

[0057] When the toy car is in normal operation, motor 1 drives the rear wheels of the toy car. One end of push rod 471 is fixedly connected to transmission spur gear 43. The rotation of transmission spur gear 43 drives push rod 471 to rotate. At the same time, the rectangular protrusion 4711 on the outer wall of push rod 471 is locked in the rectangular slide groove 473 of rear transmission rod 47, driving rear transmission rod 47 to rotate. When switching to front wheel drive, push rod 471 slides in the cylindrical slide groove 472 of rear transmission rod 47, and at the same time drives transmission spur gear 43 to slide in the internal meshing spur gear 42, so that the drive of the rear wheels is disengaged.

[0058] The friction disc 48 has a guide groove 481 inside for guiding the front wheel drive assembly 5, and a push groove 482 at the bottom of the friction disc 48, which communicates with the cylindrical slide groove 472. This allows the front wheel drive assembly 5 to enter the cylindrical slide groove 472 under the guidance of the push groove 482, thereby pushing the push rod 471 to disconnect the transmission path of the rear wheel drive assembly 4. The guide groove 481 and push groove 482 of the friction disc 48 guide the front wheel drive assembly 5, preventing it from dislodging from its original position and causing the friction transmission path of the front wheel drive assembly 5 to fail when the toy car vibrates under external force. The bottom surface of the inner wall of the guide groove 481 of the friction disc 48 is made of a material with high friction, allowing the friction disc 48 to perform friction transmission with the front wheel drive assembly 5 through the guide groove 481, thus achieving the conversion between front-wheel drive and rear-wheel drive.

[0059] Throughout the toy car's operation, motor 1 drives the internal meshing spur gear 42 to rotate, which in turn drives the transmission spur gear 43 to rotate, thereby driving the push rod 471 to rotate. The rectangular protrusion 4711 on the outer wall of the push rod 471 engages the rear transmission rod 47. The friction disc 48 is fixedly connected to the rear transmission rod 47, ensuring that the friction disc 48 always rotates following the transmission rod 47. When the front wheels of the intelligent toy car are not rotating, the friction disc 48 contacts and presses against the front wheel transmission assembly 5 through the guide groove 481 to perform friction transmission. At this time, the front wheel transmission assembly 5 enters the cylindrical slide groove 472 in the rear transmission rod 47 through the push groove 482 and pushes the push rod 471 to disengage the transmission spur gear 43 from the rear transmission bevel gear 44, thus disconnecting the rear wheel drive and switching from rear wheel drive to front wheel drive.

[0060] When the transmission mechanism disconnects the transmission path of the rear wheel during front-wheel drive, it can automatically switch the rear-wheel drive of the intelligent toy car to front-wheel drive without changing the output torque of motor 1. This makes the transmission mechanism more efficient, saves electricity, and increases the range of the intelligent toy car.

[0061] like Figures 6 to 11As shown, the front wheel drive assembly 5 includes a front wheel rod 51, a universal joint 52, a front wheel bevel gear 53, a front drive bevel gear 54, a front drive rod 55, a friction wheel 56, a fixed wheel 57, and a compression spring 58. The front wheel rod 51 has universal joints 52 for steering installed at both ends. The two front wheel rods 51 are respectively fixedly connected to two front wheel bevel gears 53 with opposite axial directions, the same module, but different diameters. The two front drive bevel gears 54 mesh with the two front wheel bevel gears 53 respectively. The front drive rod 55 is positioned near... A friction wheel 56 is slidably mounted on one end of the near-rear transmission device. The diameter of the friction wheel 56 is the same as the diameter of the guide groove 481. A rectangular groove 551 for the friction wheel 56 to slide is provided on the outer side of the front transmission rod 55. An iron ring 571 is fixedly mounted on the side of the fixed wheel 57 near the friction wheel 56. The compression spring 58 is engaged between the fixed wheel 57 and the friction wheel 56. The spring force pushes the friction wheel 56 to squeeze the friction disc 48, so that the friction wheel 56 and the friction disc 48 are transmitted under the action of friction.

[0062] When the toy car is in normal motion, the universal joint 52 adjusts the direction of the front wheels. The rotation of the front wheels drives the front wheel rod 51, which is fixedly connected to it, to rotate. The rotation of the front wheel rod 51 causes the front wheel bevel gear 53 to rotate. The front drive bevel gear 54 meshes with the front wheel bevel gear 53 and rotates. The front drive rod 55 rotates together with the front drive bevel gear 54. At this time, the friction wheel 56 and the fixed wheel 57 are connected by magnetic force, and the compression spring 58 is engaged between the friction wheel 56 and the fixed wheel 57 and is in a compressed state. When the rear wheels of the toy car do not contact the ground during the driving process, causing the front wheels to stop rotating, the magnetic force between the friction wheel 56 and the fixed wheel 57 disappears, the elastic force stored in the compression spring 58 is released, and the friction wheel 56 is pushed to slide in the rectangular groove 551 on the outside of the front drive rod 55 until the friction wheel 56 is pressed against the friction disc 48 in the rear wheel drive device to perform friction transmission. This causes the friction wheel 56 to rotate, which drives the front drive rod 55 to rotate, and then drives the front wheels of the toy car to rotate through gear meshing, thus realizing front wheel drive.

[0063] The compression spring 58, which is engaged between the fixed wheel 57 and the friction wheel 56 in the front transmission assembly, can provide a pushing force to the friction wheel 56 when the rear wheel is switched to front wheel drive, satisfying the pressure required for friction transmission, thereby enabling the drive of the motor 1 to be transmitted to the front wheel. This avoids the situation where the rear wheel spins freely and the front wheel stops without driving force when the toy car is making a sharp turn or going downhill and the rear side is airborne, causing the toy car to tip over.

[0064] like Figures 9 to 11 As shown, a push rod 561 is coaxially mounted on the side of the friction wheel 56 near the friction disc 48. The diameter of the push rod 561 is the same as the diameter of the push groove 482, and the length of the push rod 561 is greater than the depth of the push groove 482. When the push rod 561 slides under the guidance of the push groove 482, it pushes the push rod 471 in the cylindrical slide groove 472 to slide in the same direction.

[0065] The push groove 482 in the friction disc 48 guides the push rod 561, and the guide groove 481 in the friction disc 48 guides the friction wheel 56, so that when the front wheel of the toy car is driven, the friction wheel 56 accurately performs friction transmission with the friction disc 48 at a constant transmission ratio. The push rod 561 slides in the push groove 482 and pushes the push rod 471 in the rear transmission rod 47 to slide in the cylindrical slide groove 472, thereby pushing the transmission spur gear 43 in the rear wheel transmission assembly 4 to slide in the internal meshing spur gear 42.

[0066] An annular electromagnet 562 is fixedly installed on the other side of the friction wheel 56. A sliding rod 563 is fixedly installed at the center position on the same side of the friction wheel 56. A cylindrical groove 5631 with the same diameter as the front drive rod 55 is opened inside the sliding rod 563. A rectangular protrusion 5632 is provided inside the cylindrical groove 5631. The sliding rod 563 slides on the outside of the front drive rod 55 under the limiting action of the rectangular protrusion 5632, so that the friction wheel 56 and the front drive rod 55 rotate synchronously.

[0067] The front drive rod 55 slides within the cylindrical groove 5631 of the sliding rod 563, and the rectangular protrusion 5632 within the cylindrical groove 5631 is engaged within the rectangular groove 551 of the front drive rod 55. This limits the sliding distance of the sliding rod 563 to the length of the rectangular groove 551. When the transmission mechanism switches from rear-wheel drive to front-wheel drive, the sliding rod 563 slides outside the front drive rod 55, causing the friction wheel 56 to contact the friction disc 48 for friction transmission. The rotation of the friction disc 48 drives the friction wheel 56 to rotate, and the sliding rod 563 rotates along with the friction wheel 56, simultaneously driving the front drive rod 55 to rotate. The meshing of the gears achieves the driving effect of the front wheels.

[0068] A copper coil 552 is installed in the middle of the outer wall of the front drive rod 55. A ring magnet 553 is sleeved on the outside of the copper coil 552. The ring magnet 553 is fixedly connected to the base 3. The copper coil 552 controls the annular electromagnet 562 to be energized by rotating inside the annular magnet 553, thereby controlling the connection between the friction disc 48 and the fixed wheel 57.

[0069] When the toy car is in normal motion, the rear wheels drive the toy car forward, simultaneously rotating the front wheels. This causes the front drive rod 55 to rotate under gear meshing. A closed copper coil 552 is fixedly installed on the outer wall of the front drive rod 55, and a ring magnet 553 is sleeved on the outside of the copper coil 552. When the front drive rod 55 rotates, the copper coil 552 cuts magnetic field lines to stably generate current. The two ends of the copper coil 552 are respectively connected to the input and output ends of the ring electromagnet 562, thereby energizing the ring electromagnet 562 and generating magnetic force. The iron ring 571 of the fixed wheel 57 and Friction wheel 56 is connected under the action of magnetic force; when the rear wheel is lifted off the ground and the driving force of the front wheel disappears and stops rotating, the front drive rod 55 stops rotating, the copper coil 552 does not cut the magnetic field lines and does not generate current, no current flows in the annular electromagnet 562, so the magnetic force on the friction wheel 56 disappears, the elastic force of the compression spring 58 is greater than the magnetic force between the friction wheel 56 and the fixed wheel 57, the compression spring 58 pushes the sliding rod 563 of the friction wheel 56 to slide on the front drive rod 55, so that the friction wheel 56 and the friction disc 48 are pressed into contact and transmitted through friction.

[0070] This automatically changes the driving mode of the intelligent toy car, eliminating the complex structure of conventional driving mode switching. It also increases the battery life of the intelligent toy car while saving manufacturing costs, and achieves the effect of automatically controlling the driving mode change according to the actual movement of the toy car.

[0071] In the transmission mechanism of an interactive intelligent toy of the present invention, during normal operation, the motor 1 drives the internal meshing spur gear 42 in the rear wheel transmission assembly 4 to rotate, and simultaneously drives the transmission spur gear 43 to rotate. Under the elastic force of the return spring 41, the transmission spur gear 43 drives the rear transmission gear to rotate through friction transmission, thereby driving the rear wheel to rotate. At this time, the front wheel rotates under the action of the bottom surface friction force during driving, and drives the front transmission rod 55 to rotate under the gear meshing transmission. The rotation of the front transmission rod 55 causes the annular electromagnet 562 in the friction wheel 56 to generate magnetic force and interact with the fixed wheel. 57 connection; when the rear wheels do not contact the ground during driving, causing the front wheels to not rotate, the front wheel rod 51 does not rotate, causing the annular electromagnet 562 in the friction wheel 56 to lose its magnetic force and the friction wheel 56 to perform friction transmission with the friction disc 48 under the elastic force of the compression spring 58. At the same time, the push rod 561 in the friction wheel 56 pushes the push rod 471 to make the friction transmission between the transmission spur gear 43 and the rear transmission bevel gear 44 fail, disconnecting the drive of the rear wheels, thereby realizing the automatic switching of the drive mode from rear-wheel drive to front-wheel drive according to the different rotation conditions of the front wheels.

[0072] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A transmission mechanism for an interactive smart toy, comprising a motor, a bracket, and a base, wherein the motor and the bracket are fixedly mounted on the upper surface of the base; characterized in that, It also includes a rear wheel drive assembly and a front wheel drive assembly. When the rear wheel is airborne and the toy is stuck, the rear wheel drive assembly transmits power to the front wheel drive assembly through friction. The front wheel drive assembly transmits power to the front wheel through gear transmission while simultaneously disconnecting the drive of the rear wheel through the elastic force of a spring. The rear wheel drive assembly includes a drive spur gear, a rear drive rod, and a friction disc; the other end of the rear drive rod is fixedly equipped with a friction disc that transmits the drive from the rear wheels to the front wheels. The aforementioned front wheel drive assembly includes a friction wheel and a compression spring; A push rod is installed inside the rear drive rod; A push rod is coaxially mounted on the side of the friction wheel near the friction disc; The friction disc contacts and presses against the front wheel drive assembly through the guide groove to perform friction transmission. At this time, the front wheel drive assembly enters the cylindrical slide groove in the rear drive rod through the push groove, and pushes the push rod to disconnect the transmission spur gear from the rear transmission bevel gear, thus disconnecting the drive of the rear wheel and realizing the change from rear wheel drive to front wheel drive.

2. The transmission mechanism of an interactive intelligent toy according to claim 1, characterized in that: The rear wheel drive assembly includes a return spring, an internal meshing spur gear, a rear drive bevel gear, a rear wheel bevel gear, and a rear wheel rod. The return spring is engaged between the internal meshing spur gear and the drive spur gear, allowing the drive spur gear to slide while meshing inside the internal meshing spur gear. The rear drive bevel gear generates friction by pressing against the drive spur gear, causing the rear drive bevel gear to rotate while simultaneously driving two rear wheel bevel gears with opposite axes, the same module, but different diameters, to rotate, thereby driving the two rear wheel rods to rotate with the same transmission ratio. The connection between the rear wheel rod and the bracket is symmetrically provided with limiting blocks to prevent the rear wheel rod from sliding. The end of the rear drive rod is rotatably connected to the rear drive bevel gear on the same axis.

3. The transmission mechanism of an interactive intelligent toy according to claim 2, characterized in that: The rear drive bevel gear is rotatably connected to the rear drive rod, and a connecting rod is fixedly installed between the two rear drive bevel gears. The connecting rod is hollow cylindrical in shape, and its length is equal to the sum of the radii of the two rear drive bevel gears, so that the two rear drive bevel gears mesh with the two rear drive bevel gears respectively.

4. The transmission mechanism of an interactive intelligent toy according to claim 2, characterized in that: A circular stop is provided on the side of the internal meshing spur gear near the motor. The diameter of the circular stop is equal to the outer diameter of the internal meshing spur gear. The inner side of the circular stop is limited to the transmission spur gear inside the internal meshing spur gear by the elastic force of the return spring.

5. The transmission mechanism of an interactive intelligent toy according to claim 2, characterized in that: The outer wall of the push rod is provided with a rectangular protrusion; the interior of the rear transmission rod is provided with a cylindrical groove for the push rod to slide, and the outer side of the rear transmission rod is provided with a rectangular groove. The rectangular groove and the rectangular protrusion cooperate to limit the sliding and rotation of the push rod in the rear transmission rod.

6. The transmission mechanism of an interactive intelligent toy according to claim 2, characterized in that: The friction disc has a guide groove inside for guiding the front wheel drive assembly, and a push groove is provided at the bottom of the friction disc. The push groove communicates with the cylindrical slide groove, so that the front wheel drive assembly enters the cylindrical slide groove under the guidance of the push groove, thereby pushing the push rod to disconnect the transmission path of the rear wheel drive assembly.

7. The transmission mechanism of an interactive intelligent toy according to claim 1, characterized in that: The front wheel drive assembly includes a front wheel rod, universal joints, a front wheel bevel gear, a front drive bevel gear, a front drive rod, and a fixed wheel. Universal joints for steering are installed at both ends of the front wheel rod. The two front wheel rods are fixedly connected to two front wheel bevel gears with opposite axial directions, the same module, but different diameters. The two front drive bevel gears mesh with the two front wheel bevel gears. A friction wheel is slidably mounted on the end of the front drive rod near the rear drive device. The diameter of the friction wheel is the same as the diameter of the guide groove. A rectangular groove for the friction wheel to slide is provided on the outer side of the front drive rod. An iron ring is fixedly installed on the side of the fixed wheel near the friction wheel. A compression spring is engaged between the fixed wheel and the friction wheel, and the spring force pushes the friction wheel against the friction disc, causing the friction wheel and friction disc to transmit power under friction.

8. The transmission mechanism of an interactive intelligent toy according to claim 6, characterized in that: The diameter of the push rod is the same as the diameter of the push groove, and the length of the push rod is greater than the depth of the push groove, so that when the push rod slides under the guidance of the push groove, it pushes the push rod in the cylindrical slide groove to slide in the same direction.

9. The transmission mechanism of an interactive intelligent toy according to claim 7, characterized in that: An annular electromagnet is fixedly installed on the other side of the friction wheel, and a sliding rod is fixedly installed at the center of the same side of the friction wheel. The sliding rod has a cylindrical groove with the same diameter as the front drive rod inside. A rectangular protrusion is provided inside the cylindrical groove. The sliding rod slides on the outside of the front drive rod under the limiting action of the rectangular protrusion, so that the friction wheel and the front drive rod rotate synchronously.

10. The transmission mechanism of an interactive intelligent toy according to claim 7, characterized in that: A copper coil is installed in the middle of the outer wall of the front drive rod. A ring magnet is sleeved on the outside of the copper coil. The ring magnet is fixedly connected to the base. The copper coil controls the ring electromagnet to be energized by rotating inside the ring magnet, thereby controlling the connection between the friction disc and the fixed wheel.

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