Power driving mechanism of toy car

Abstract

The utility model provides a toy car power driving mechanism which comprises a moving driving device and a steering driving device, the steering driving device comprises a wheel shaft, a steering connecting rod, a steering motor and a steering driving gear, the wheel shaft is driven by the moving driving device to rotate, the two ends of the wheel shaft are respectively and rotatably connected with a wheel seat, and the steering driving gear is connected with the wheel seat. A steering shaft is fixedly arranged on the wheel seat, a rack is arranged on one side of the steering connecting rod, connecting blocks are arranged on the same side of the steering connecting rod and the rack in an outward protruding mode, and the steering shaft is movably sleeved with the connecting blocks in a one-to-one correspondence mode. The steering driving gear comprises a cylindrical gear and a sector gear which are coaxially fixed, a sector step is formed at the joint of the cylindrical gear and the sector gear, the cylindrical gear is in meshed connection with the rack, the sector gear is in transmission connection with the steering motor, and the sector step can rotate to abut against any connecting block for limiting. And the cylindrical gear is continuously connected with the rack, and the sector gear is continuously connected with the steering motor.

Description

Technical Field

[0001] This utility model relates to the field of toy car technology, and more particularly to a toy car power drive mechanism. Background Technology

[0002] Most existing remote-controlled toy cars use a motor-driven mechanical structure to control the steering of the front wheels. The steering mechanism is generally a parallelogram-shaped frame; when the motor rotates, it drives the parallelogram to oscillate left and right, thus rotating the front wheels. Existing patent document CN213285644U provides a steering mechanism for toy cars that adds a potentiometer as a control signal feedback mechanism for the steering angle in the motor-driven steering stage, achieving precise control of the steering angle of the motor-driven wheels. However, it lacks a limiting safety structure between the steering drive gear and the steering linkage. If the potentiometer malfunctions and cannot transmit the angle feedback signal in time, the motor may continue to operate, causing the steering drive gear to disengage from the steering linkage, ultimately resulting in a loss of steering control. Therefore, its safety and reliability are relatively weak. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a toy car power drive mechanism.

[0004] To achieve the aforementioned objectives, this utility model provides a toy car power drive mechanism, including a moving drive device and a steering drive device. The steering drive device includes a wheel axle, a steering linkage, a steering motor, and a steering drive gear. The wheel axle is driven to rotate by the moving drive device. Wheel seats are rotatably connected to both ends of the wheel axle. A steering shaft is fixed on the wheel seat. A rack is provided on one side of the steering linkage, and a connecting block protrudes outward on the same side as the rack. The connecting blocks are movably sleeved on the steering shaft in a corresponding manner. The steering drive gear includes a spur gear and a sector gear fixed coaxially. A sector-shaped step is formed at the contact point between the spur gear and the sector gear. The spur gear is meshed with the rack, and the sector gear is driven by the steering motor. The sector-shaped step can rotate to abut against any of the connecting blocks, so that the spur gear and the rack, and the sector gear and the steering motor can be continuously connected.

[0005] As a preferred embodiment, the distance from one side of the sector step to one side of the sector gear is equal to the distance from the other side of the sector step to the other side of the sector gear.

[0006] As a preferred embodiment, the ratio of the central angle of the sector gear to that of the sector step is in the range of 1.8-2.

[0007] As a preferred embodiment, the steering drive device further includes a transmission gear, which is fixed on the shaft of the steering motor and meshes with the sector gear.

[0008] As a preferred embodiment, the wheel axle includes a gear segment and wheel segments respectively fixed to both ends of the gear segment. The gear segment is fixed with a gear that is connected to the moving drive device. The two ends of the gear segment are respectively provided with fixing holes for detachable connection to the wheel segments. Each wheel segment is rotatably connected to the wheel seat.

[0009] As a preferred embodiment, the mobile drive device includes a housing, a drive motor, and a gear set. The drive motor is fixedly installed inside the housing. The gear set includes a variable speed gear set and a transmission gear set that are meshed together. The variable speed gear set is driven by the drive motor. Part of the transmission gear set is externally mounted on the housing and meshes with the gears of the gear segment.

[0010] As a preferred embodiment, the housing includes a detachable and fixed first housing and a second housing, wherein the outer side of the first housing is raised to form a hollow frame, and the drive motor is held and fixed inside the hollow frame.

[0011] As a preferred embodiment, the gear set includes a first gear, a second gear, a third gear, and a fourth gear that are meshed together in sequence. The first gear is fixed to the shaft of the drive motor, and a connecting shaft is fixed to the center of the shaft of the fourth gear. The connecting shaft is rotatably inserted through both sides of the housing, and the transmission ratio of the gear set is in the range of 13-14.

[0012] As a preferred embodiment, the transmission gear set includes two drive gears fixed at both ends of the transmission shaft, the transmission shaft being rotatably mounted on the housing, one of the drive gears meshing with a gear in the gear segment, and the transmission ratio between the variable speed gear set, the transmission gear set, and the gear is equal to the transmission ratio of the variable speed gear set.

[0013] Therefore, based on the technical means of this utility model, the effects that this utility model can achieve are briefly described as follows: The toy car power drive mechanism provided by this utility model improves the structure of the steering drive gear. A fan-shaped step is formed at the junction of the spur gear and the sector gear of the steering drive gear. Through the cooperation of the fan-shaped step and the connecting block, it can serve as a limiting and safety structure for the steering drive gear and the steering linkage, so as to achieve the purpose of resisting and limiting the steering drive gear and the steering linkage, so that the spur gear and the rack, and the sector gear and the steering motor can be continuously connected, preventing the steering drive gear from disengaging from the steering linkage, and making the steering function safer and more reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0015] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the power drive mechanism of a toy car.

[0016] Figure 3 for Figure 2 A schematic diagram of the steering drive gear.

[0017] Figure 4 for Figure 1 A schematic diagram of the connection structure of the power drive mechanism of a toy car.

[0018] Figure 5 for Figure 1 A schematic diagram of the steering drive device when it is in steering limit position.

[0019] In the diagram: 1: Motion drive device; 11: Housing; 111: First housing; 1110: Hollow frame; 112: Second housing; 12: Drive motor; 13: Gear set; 131: Transmission gear set; 1311: First gear; 1312: Second gear; 1313: Third gear; 1314: Fourth gear; 1315: Connecting shaft; 132: Transmission gear set; 1321: Transmission shaft; 1322: Drive gear; 2: Steering drive device; 21: Wheel axle; 211: Gear segment; 2111: Gear; 2112: Fixing hole; 212: Wheel segment; 22: Steering linkage; 221: Rack; 222: Connecting block; 23: Steering motor; 24: Steering drive gear; 241: Spur gear; 242: Sector gear; 243: Sector step; 25: Wheel seat; 251: Steering shaft; 26: Transmission gear. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present utility model. The connections shown in the drawings are only for clear description and do not limit the connection method.

[0021] It should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer" are used to describe the directional or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, not to indicate that the device or element referred to must have a specific directional or positional relationship, and therefore should not be construed as a limitation of the present invention. It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component present. It should be understood that terms such as "first" and "second" are only for the convenience of describing the technical solution of the present invention, and are not to indicate that the device or element referred to must have a specific order, and therefore should not be construed as a limitation of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention.

[0022] Please refer to the following at the same time Figure 1-5 This embodiment provides a toy car power drive mechanism, including a moving drive device 1 and a steering drive device 2, wherein the moving drive device 1 is used to drive the toy car to move forward or backward, and the steering drive device 2 is used to drive the toy car to turn left or right.

[0023] The mobile drive unit 1 includes a housing 11, a drive motor 12, and a gear set 13. The housing 11 includes a detachably fixed first housing 111 and a second housing 112. A perforated frame 1110 is formed by a raised outer side of the first housing 111, within which the drive motor 12 is held and fixed. The perforated frame 110 facilitates quick installation of the drive motor 12 within the housing 11 and also improves the heat dissipation efficiency of the drive motor 12. The gear set 13 includes a gear shifting gear set 131 and a transmission gear set 132 that mesh with each other. The gear shifting gear set 131 is connected to the drive motor 12, and the transmission gear set 132 is partially externally mounted on the housing 11 and meshes with the wheel axle of the steering drive unit 2.

[0024] In this embodiment, the gear set 131 includes a first gear 1311, a second gear 1312, a third gear 1313, and a fourth gear 1314 that are sequentially meshed. The first gear 1311 is fixed to the shaft of the drive motor 12. A connecting shaft 1315 is fixed to the center of the shaft of the fourth gear 1314. The connecting shaft 1315 rotatably passes through both sides of the housing 11 and is used to fix the rear wheel of the toy car. It can be understood that the transmission ratio of the gear set 131 is set to 13.58 to smoothly drive the rear wheel to rotate, thus achieving the movement function. In other embodiments, the gear composition of the gear set 131 can be adjusted. For example, the gear set 131 can be composed of two, three, or more gears meshing sequentially. The transmission ratio of the gear set 131 can also be adjusted within the range of 13-14, for example, to 13, 14, 13.5, 13.2, 13.8, etc.

[0025] The transmission gear set 132 includes two drive gears 1322 fixed at both ends of the transmission shaft 1321. The transmission shaft 1321 is rotatably mounted on the housing 11. One of the drive gears 1322 meshes with the wheel axle of the steering drive device 2, and is used to synchronously drive the wheel axle to rotate when the drive motor 12 is started. It is understood that the transmission ratio between the gear set 131, the transmission gear set 132, and the gears on the wheel axle is equal to the transmission ratio of the gear set 131, used to smoothly drive the front and rear wheels of the toy car to rotate synchronously.

[0026] The steering drive device 2 includes a wheel axle 21, a steering linkage 22, a steering motor 23, and a steering drive gear 24. The wheel axle 21 is driven to rotate by the moving drive device 1. In this embodiment, the wheel axle 21 includes a gear segment 211 and wheel segments 212 fixed to both ends of the gear segment 211. A gear 2111 is fixed on the gear segment 211 and meshes with one of the drive gears 1322. Fixing holes 2112 for detachably connecting the wheel segments 212 are provided at both ends of the gear segment 211. It can be understood that the fixing holes 2112 are polygonal holes, and one end of the wheel segment 212 is adapted to be inserted into the polygonal hole to increase the connection strength between the wheel segment 212 and the gear segment 211 in the circumferential direction, so that the rotation of the gear segment 211 can drive the wheel segment 212 to rotate.

[0027] Each wheel segment 212 is rotatably connected to a wheel seat 25. The wheel seat 25 is used to fix the front wheel of the toy car. A steering shaft 251 is fixed on the wheel seat 25. The steering shaft 251 is movably inserted into the steering linkage 22. When the steering linkage 22 moves in a straight line, it can drive the steering shaft 251 to rotate left and right, so as to realize the angle adjustment function of the front wheel.

[0028] A rack 221 is provided on one side of the steering link 22, and a connecting block 222 protrudes outward on the same side as the rack 221. The connecting blocks 222 are movably sleeved on the steering shaft 251 in a corresponding manner. The steering link 22 is meshed with the steering drive gear 24 through the rack 221, and can move left and right under the rotation of the steering drive gear 24. The steering link 22 is rotatably connected to the wheel seat 25 through the connecting blocks 222, and can drive the wheel seat 25 to rotate when moving.

[0029] The steering motor 23 is connected to the steering drive gear 24 via the transmission gear 26. The transmission gear 26 is fixed on the rotating shaft of the steering motor 23 and meshes with the sector gear of the steering drive gear 24. When the steering motor 23 is started, it drives the steering drive gear 24 to rotate slowly.

[0030] The steering drive gear 24 includes a coaxially fixed spur gear 241 and a sector gear 242, with a sector-shaped step 243 formed at the junction of the spur gear 241 and the sector gear 242. It can be understood that the distance from one side of the sector-shaped step 243 to one side of the sector gear 242 is equal to the distance from the other side of the sector-shaped step 243 to the other side of the sector gear 242. That is, the sector-shaped step 243 is located in the middle of the sector gear 242, and in this embodiment, the ratio of the central angles of the sector gear 242 and the sector-shaped step 243 is set to 1.89. Specifically, the central angle of the sector gear 242 is set to 170 degrees, and the central angle of the sector-shaped step 243 is set to 90 degrees. This setting limits the rotation angle range of the steering drive gear 24, thereby limiting the rotation angle range of the toy car's front wheels, enabling the toy car's steering function to meet most common road conditions. In other embodiments, the ratio of the central angle of the sector gear 242 to the sector step 243 can be adjusted in the range of 1.8-2, for example, to 1.8, 1.9, 2, etc.

[0031] It is understood that the spur gear 241 meshes with the rack 221, and the sector gear 242 meshes with the transmission gear 26. When the sector gear 242 is controlled to rotate continuously in one direction, the sector-shaped step 243 can rotate until it abuts against the connecting block 222 in the corresponding direction, thus ensuring that the spur gear 241 and rack 221, and the sector gear 242 and transmission gear 26 are continuously connected. This ensures that the connecting structures cannot disengage, guarantees the reliable operation of the steering structure, and improves functional safety and reliability.

[0032] For clarity, certain features described in individual embodiments of the present invention may be used in combination in a single embodiment. Furthermore, various features of the present invention described in individual embodiments may also be used individually or in any suitable form in sub-combinations.

Claims

1. A toy car power drive mechanism, comprising a motion drive device and a steering drive device, wherein the steering drive device includes a wheel axle, a steering linkage, a steering motor, and a steering drive gear, the wheel axle is driven to rotate by the motion drive device, wheel seats are rotatably connected to both ends of the wheel axle, and a steering shaft is fixedly mounted on the wheel seats, characterized in that, One side of the steering linkage is provided with a rack, and a connecting block protrudes outward on the same side as the rack. The connecting blocks are movably sleeved on the steering shaft in a corresponding manner. The steering drive gear includes a spur gear and a sector gear fixed coaxially. A sector-shaped step is formed at the contact point between the spur gear and the sector gear. The spur gear is meshed with the rack, and the sector gear is driven by the steering motor. The sector-shaped step can be rotated to abut against any of the connecting blocks to a stop, so that the spur gear and the rack, and the sector gear and the steering motor can be continuously connected.

2. The toy car power drive mechanism as described in claim 1, characterized in that, The distance from one side of the sector step to one side of the sector gear is equal to the distance from the other side of the sector step to the other side of the sector gear.

3. The toy car power drive mechanism as described in claim 2, characterized in that, The ratio of the central angle between the sector gear and the sector step is in the range of 1.8-2.

4. The toy car power drive mechanism as described in claim 1, characterized in that, The steering drive device further includes a transmission gear, which is fixed on the shaft of the steering motor and meshes with the sector gear.

5. The toy car power drive mechanism as described in claim 1, characterized in that, The wheel axle includes a gear segment and wheel segments fixed to both ends of the gear segment. The gear segment is fixed with a gear that is connected to the moving drive device. The two ends of the gear segment are respectively provided with fixing holes for detachable connection to the wheel segments. Each wheel segment is rotatably connected to the wheel seat.

6. The toy car power drive mechanism as described in claim 5, characterized in that, The mobile drive device includes a housing, a drive motor, and a gear set. The drive motor is fixedly installed inside the housing. The gear set includes a variable speed gear set and a transmission gear set that are meshed together. The variable speed gear set is connected to the drive motor in a transmission manner. Part of the transmission gear set is externally mounted on the housing and meshes with the gears of the gear segment.

7. The toy car power drive mechanism as described in claim 6, characterized in that, The housing includes a detachable and fixed first housing and a second housing. The outer side of the first housing is raised to form a hollow frame, and the drive motor is fixedly held in the hollow frame.

8. The toy car power drive mechanism as described in claim 6, characterized in that, The gear set includes a first gear, a second gear, a third gear, and a fourth gear that are meshed together in sequence. The first gear is fixed on the shaft of the drive motor. A connecting shaft is fixed at the center of the shaft of the fourth gear. The connecting shaft is rotatably inserted through both sides of the housing. The transmission ratio of the gear set is 13-14.

9. The toy car power drive mechanism as described in claim 8, characterized in that, The transmission gear set includes two drive gears fixed at both ends of the transmission shaft, the transmission shaft being rotatably mounted on the housing, one of the drive gears meshing with a gear in the gear segment, and the transmission ratio between the variable speed gear set, the transmission gear set, and the gear is equal to the transmission ratio of the variable speed gear set.

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