Driving device suitable for track structure of toy car

Abstract

The utility model provides a driving device suitable for a track structure of a toy car, which comprises a motor, a driving wheel fixed with a driving wheel of the track structure, and a transmission wheel group in transmission connection between the motor and the driving wheel, the transmission wheel set comprises a first gear fixed to a rotating shaft of the motor, a second gear meshed with the first gear and a gear set meshed between the second gear and the driving wheel, and the gear set comprises two multi-linkage gears meshed in sequence. Each multi-linkage gear comprises at least two transmission teeth which are coaxially and rotatably connected, each transmission tooth comprises a large gear and a small gear which are fixed, the large gears and the small gears in the same multi-linkage gear are sequentially distributed at intervals along the axis, and in the two sequentially meshed multi-linkage gears, the large gears and the small gears are coaxially and rotatably connected. The large gear of one multi-linkage gear is meshed with the small gear of the other multi-linkage gear; the transmission ratio of each meshing gear pair in the transmission wheel set is larger than one.

Description

Technical Field

[0001] The utility model relates to the technical field of toy driving devices, in particular to a driving device suitable for a toy car crawler structure. Background Art

[0002] There are many kinds of children's toys, and toy cars are one of them. Patent document CN201415060Y provides a toy remote-controlled engineering excavator. A driving device is installed in the excavator to realize the track drive of the toy car. The motor drives the speed change gear to control the drive gear to change speed and rotate, so as to drive the track driving wheel to rotate.

[0003] Traditional crawler toy cars use low-speed motors with slow speeds, so only one or two speed transmissions are required between the motor and the crawler driving wheel to achieve the required driving force or desired movement speed. However, the traditional speed gear structure is not suitable for high-speed motors. Therefore, in view of this, the existing structure and defects are studied and improved to provide a driving device suitable for the crawler structure of a toy car, in order to achieve a more practical purpose. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a driving device suitable for a toy car crawler structure, aiming to solve the problem that the speed change gear structure of the existing crawler toy car is not suitable for a high-speed motor.

[0005] In order to achieve the aforementioned purpose, the utility model provides a driving device suitable for a toy car track structure, comprising a motor, a driving wheel fixed to the driving wheel of the track structure, and a transmission wheel group transmission-connected between the motor and the driving wheel, the transmission wheel group comprising a first gear fixed to the rotating shaft of the motor, a second gear meshing with the first gear, and a gear group meshing between the second gear and the driving wheel, the gear group comprising two multi-linked gears meshing in sequence, each of the multi-linked gears comprising at least two transmission teeth coaxially connected, each of the transmission teeth comprising a fixed large gear and a small gear, a plurality of large gears and small gears in the same multi-linked gear are sequentially spaced and distributed along the axis, and in the two multi-linked gears meshing in sequence, the large gear of one of the multi-linked gears meshes with the small gear of the other multi-linked gear; the transmission ratio of each meshing gear pair in the transmission wheel group is greater than one.

[0006] As a preferred embodiment, the first gear is a spur gear, the second gear is a double gear consisting of a spur gear and a crown gear, the first gear is fixed to the rotating shaft of the motor, the crown gear of the second gear is meshed with the first gear, and the spur gear of the second gear is meshed with the large gear of one of the multi-gears.

[0007] As a preferred solution, the transmission ratio of the second gear to the first gear is 2:1, and the transmission ratio of the second gear to the large gear of the multi-stage gear is 3:1.

[0008] As a preferred solution, the transmission ratio of the large gear to the small gear of the two multi-stage gears is 15:7.

[0009] As a preferred solution, the driving wheel meshes with the small gear of the other multi-stage gear, and the transmission ratio between them is 16:7.

[0010] As a preferred solution, the number of teeth of the spur gears in the first gear and the second gear is 10, the number of teeth of the crown gear in the second gear is 20, the large gear of the transmission gear is a spur gear with 30 teeth, the small gear of the transmission gear is a spur gear with 14 teeth, and the driving wheel is a spur gear with 32 teeth.

[0011] As a preferred solution, the number of transmission teeth in each multi-stage gear is two.

[0012] As a preferred solution, the motor, the driving wheel and the transmission wheel set are installed in a housing. The housing includes a fixed first housing and a second housing. A connection groove is provided on the outer surface of the first housing, and the shaft body of the driving wheel is rotatably connected in the connection groove.

[0013] As a preferred solution, connection holes protruding from the outer surface are provided on the first housing and / or the second housing, and heat dissipation holes are provided on the first housing and the second housing corresponding to the motor.

[0014] As a preferred solution, a plurality of connection shaft columns are respectively protrudingly provided on the inner surface of the first housing corresponding to the positions of the gears in the transmission wheel set, and the gears of the transmission wheel set are rotatably connected to the connection shaft columns correspondingly; connection shaft cavities are provided on the inner surface of the second housing corresponding to the connection shaft columns, and the connection shaft cavities are rotatably connected to the connection shaft columns in a one-to-one correspondence.

[0015] The functions and beneficial effects that can be obtained by the present utility model are as follows: The driving device applicable to the track structure of a toy car provided by the present utility model is provided with a gear set inside the transmission wheel set. The gear set is composed of two multi-link gears that are sequentially engaged. Each multi-link gear includes at least two transmission teeth that are rotatably connected coaxially. Each transmission tooth includes a fixed large gear and a small gear, so that the multiple large gears and small gears of the multi-link gear are sequentially spaced along the axis. It also makes the large gear and the small gear in two adjacent multi-link gears engaged with each other, and the transmission ratios of multiple pairs of engaged gear pairs in the transmission wheel set are all greater than one. Through the setting of the above multi-link gear speed reduction structure, the transmission wheel set can be applicable to a high-speed motor, and can also transmit and output the required transmission ratio efficiently and stably. At the same time, the structure of the transmission wheel set can be made more flattened, realizing the miniaturization of the driving device, which is more conducive to being arranged on the track structure of a small toy car. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present utility model.

[0017] Figure 2 is Figure 1 a schematic exploded structural diagram of the driving device in

[0018] Figure 3 is Figure 2 a schematic structural diagram of the first housing in

[0019] Figure 4 is Figure 1 a schematic structural diagram of the motor and the transmission wheel set in

[0020] In the figure: 1: housing; 11: first housing; 111: connection groove; 112: connection shaft column; 12: second housing; 121: positioning shaft column; 122: connection shaft cavity; 13: connection hole; 14: heat dissipation hole; 2: motor; 3: driving wheel; 31: shaft body; 4: transmission wheel set; 41: first gear; 42: second gear; 43: gear set; 430: multi-link gear; 431: transmission tooth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model. It can be understood that the accompanying drawings are only for reference and illustration, and are not used to limit the present utility model. The connections shown in the drawings are only for clear description and do not limit the connection method.

[0022] It should be understood that the terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like are based on the directions or positional relationships shown in the drawings to describe the present invention, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating that the devices or elements referred to must have a special direction or positional relationship, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a piece is considered to be "connected" to another piece, it may be directly connected to the other piece or there may be a central piece at the same time. It should be understood that the terms such as "first", "second", "third", "fourth" and the like are only for the convenience of describing the technical solution of the present invention, rather than indicating that the devices or elements referred to must have a special order, and therefore cannot be understood as a limitation on the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] Please also refer to Figures 1-4 This embodiment provides a driving device suitable for a toy car track structure, including a housing 1, and a motor 2, a driving wheel 3 and a transmission wheel set 4 correspondingly installed in the housing 1. The driving wheel 3 is fixed to the driving wheel of the toy car track structure, and the transmission wheel set 4 is connected between the motor 2 and the driving wheel 3. When the motor 2 is started, the driving wheel 3 can be driven to rotate by the transmission wheel set 4, thereby driving the driving wheel to rotate synchronously, so as to realize the rotation of the track structure. It can be understood that the track structure of the toy car is usually provided with a driving device for controlling the rotation of the left and right driving wheels. Through the cooperation of the two driving devices, the track structure of the toy car can be controlled to realize the functions of moving forward, backward, turning left and right, and circling.

[0024] In other embodiments, the driving device may not be provided with a housing 1, and in this case the motor 2, the driving wheel 3 and the transmission wheel set 4 are directly fixed in the housing of the crawler structure.

[0025] The housing 1 includes a fixed first housing 11 and a second housing 12. A connecting groove 111 is provided on the outer surface of the first housing 11, and a driving wheel 3 is rotatably connected in the connecting groove 111, so that the driving wheel 3 can pass through the connecting groove 111 and extend out of the outer surface of the first housing 11. In this embodiment, a plurality of connecting shaft columns 112 are protrudingly provided on the inner surface of the first housing 11 corresponding to the positions of the gears in the transmission wheel set 4, and the connecting shaft columns 112 are correspondingly rotatably connected to the gears of the transmission wheel set 4. It can be understood that the connecting shaft columns 112 can simplify the installation steps of the gears of the transmission wheel set 4, reduce the steps of fixing the rotating shaft on the gears of the transmission wheel set 4, and help save product assembly time and improve assembly efficiency.

[0026] On the inner surface of the second housing 12, a positioning shaft post 121 is protrudingly provided at a position corresponding to the connecting groove 111. The positioning shaft post 121 is used for rotatably mounting the driving wheel 3. The positioning shaft post 121 can simplify the installation steps of the driving wheel 3 and further improve the assembly efficiency of the product. On the inner surface of the second housing 12, a connecting shaft cavity 122 is provided at a position corresponding to the connecting shaft post 112. The connecting shaft cavity 122 is rotatably connected to the connecting shaft post 112 in a one-to-one correspondence, enabling the stable connection of the transmission wheel set 4 between the first housing 11 and the second housing 12. In other embodiments, the inner surface of the first housing 11 may not be provided with the connecting shaft post 112. At this time, the inner surface of the first housing 11 may be provided with a shaft cavity for cooperating with the connecting shaft cavity 122 to rotatably connect the gears in the transmission wheel set 4. Similarly, the inner surface of the second housing 12 may not be provided with the positioning shaft post. At this time, the inner surface of the second housing 12 may be provided with a shaft cavity for rotatably connecting the rotating shaft of the driving wheel 3.

[0027] In this embodiment, a connecting hole 13 protruding from the outer surface is provided on the first housing 11. Through the connecting hole 13, the driving device can be fixed between the two outer housings. The first housing 11 and the second housing 12 are provided with heat dissipation holes 14 corresponding to the motor 2. By providing the heat dissipation holes 14, it is beneficial to improve the heat dissipation efficiency of the motor 2. In other embodiments, the connecting hole 13 may also be provided only on the first housing 11, or provided on both the first housing 11 and the second housing 12. The housing 1 may not be provided with the connecting hole 13 and / or the heat dissipation hole 14.

[0028] It can be understood that the shaft body 31 in the middle of the driving wheel 3 passes through the connecting groove 111 and is rotatably connected in the connecting groove 111, and the end of the shaft body 31 located in the connecting groove 111 is provided as a multi-prism for plugging and fixing with the driving wheel, realizing circumferential clamping and preventing the situation where the driving wheel 3 cannot drive the driving wheel to rotate.

[0029] The transmission wheel set 4 includes a first gear 41 fixed to the rotating shaft of the motor 2, a second gear 42 meshing with the first gear 41, and a gear set 43 meshing between the second gear 42 and the driving wheel 3. In this embodiment, the gear set 43 includes two multi-stage gears 430 meshing in sequence. Each multi-stage gear 430 includes two transmission teeth 431 rotatably connected coaxially. Each transmission tooth 431 includes a fixed large gear and a small gear. Among them, the multiple large gears and small gears of the same multi-stage gear 430 are sequentially spaced along the axis. Among the two multi-stage gears 430 meshing in sequence, the large gear of one multi-stage gear 430 meshes with the small gear of the other multi-stage gear 430. In other embodiments, the number of transmission teeth 431 in each multi-stage gear 430 may also be three or more than four.

[0030] It can be understood that the transmission ratios of the meshing gear pairs in the transmission wheel set 4 are all greater than one, and the transmission ratio between the multi-stage gear 430 and the driving wheel 3 is also greater than one. The above settings can reduce the speed of the high-speed motor and transmit it to the driving wheel 3, and at the same time increase the torque of the driving device to control the stable running of the crawler structure of the toy car, so that the crawler structure of the toy car has excellent acceleration ability and climbing ability.

[0031] In this embodiment, the first gear 41 is a spur gear, and the second gear 42 is a multi-stage gear composed of a spur gear and a crown gear. The first gear 41 is fixed to the rotating shaft of the motor 2. The crown gear of the second gear 42 meshes with the first gear 41, and their transmission ratio is 2:1. The spur gear of the second gear 42 meshes with the large gear of one of the multi-stage gears 430, and their transmission ratio is 3:1. In other embodiments, the first gear 41 can also be a worm gear, and the corresponding second gear 42 is a multi-stage gear composed of two spur gears.

[0032] In this embodiment, the transmission ratio between the large gear and the small gear of the two multi-stage gears 430 is 15:7. The driving wheel 3 meshes with the small gear of the other multi-stage gear 430, and their transmission ratio is 16:7. Among them, the number of teeth of the spur gears in the first gear 41 and the second gear 42 is 10, the number of teeth of the crown gear in the second gear 42 is 20, the large gear of the transmission tooth 431 is a spur gear with 30 teeth, the small gear of the transmission tooth 431 is a spur gear with 14 teeth, and the driving wheel 3 is a spur gear with 32 teeth. In other embodiments, the number of teeth of each gear in the transmission wheel set 4 can also be set to other values according to the size of the transmission ratio.

[0033] It can be understood that the above settings of the number of teeth of each gear can meet the transmission ratio requirements of each meshing gear pair, making the driving device more suitable for high-speed motors. Moreover, the above settings of the number of teeth of each gear can set the occupied volume of the transmission wheel set 4 within a reasonable range, making the structure of the driving device compact. Combined with the flattened multi-stage gear reduction structure, it can achieve a smaller volume ratio compared with the structure with the same transmission ratio, which is more conducive to being arranged on the crawler structure of a small toy car.

[0034] For clarity, certain features described in the individual embodiments of the present invention can be combined and used in a single embodiment. Moreover, the various features of the present invention described in a single embodiment can also be used separately or in any suitable form in sub-combinations.

Claims

1. A driving device applicable to a crawler structure of a toy car, comprising a motor, a driving wheel fixed to a driving wheel of the crawler structure, and a transmission wheel set drivingly connected between the motor and the driving wheel, characterized in that, The drive wheel set includes a first gear fixed to the rotating shaft of the motor, a second gear meshing with the first gear, and a gear set meshing between the second gear and the drive wheel. The gear set includes two multi-stage gears meshing in sequence. Each multi-stage gear includes at least two transmission teeth rotatably connected coaxially. Each transmission tooth includes a fixed large gear and a small gear. The multiple large gears and small gears in the same multi-stage gear are sequentially spaced along the axis. In two sequentially meshing multi-stage gears, the large gear of one multi-stage gear meshes with the small gear of the other multi-stage gear; the transmission ratio of each meshing gear pair in the drive wheel set is greater than one.

2. The drive device applicable to the crawler structure of a toy car according to claim 1, characterized in that, The first gear is a spur gear, the second gear is a double gear composed of a spur gear and a crown gear. The first gear is fixed to the rotating shaft of the motor, the crown gear of the second gear meshes with the first gear, and the spur gear of the second gear meshes with the large gear of one of the multi-stage gears.

3. The drive device applicable to the track structure of a toy car according to claim 2, characterized in that, The transmission ratio between the second gear and the first gear is 2:1, and the transmission ratio between the second gear and the large gear of the multi-stage gear is 3:

1.

4. The drive device applicable to the crawler structure of a toy car according to claim 3, characterized in that, The transmission ratio between the large gear and the small gear in the two multi-stage gears is 15:

7.

5. The drive device applicable to the track structure of a toy car according to claim 4, characterized in that, The drive wheel meshes with the small gear of the other multi-stage gear, and the transmission ratio between them is 16:

7.

6. The drive device applicable to the crawler structure of a toy car according to claim 5, characterized in that, The number of teeth of the spur gears in the first gear and the second gear is 10. The number of teeth of the crown gear in the second gear is 20. The large gear of the transmission tooth is a spur gear with 30 teeth, the small gear of the transmission tooth is a spur gear with 14 teeth, and the drive wheel is a spur gear with 32 teeth.

7. The drive device applicable to the crawler structure of a toy car according to any one of claims 1-6, characterized in that, The number of transmission teeth in each multi-stage gear is two.

8. The drive device applicable to the crawler structure of a toy car according to any one of claims 1-6, characterized in that, The motor, the drive wheel and the drive wheel set are installed in a housing. The housing includes a fixed first housing and a second housing. A connecting groove is provided on the outer surface of the first housing, and the shaft body of the drive wheel is rotatably connected in the connecting groove.

9. The drive device applicable to the track structure of a toy car according to claim 8, characterized in that, Connecting holes protruding from the outer surface are provided on the first housing and / or the second housing. The first housing and the second housing are provided with heat dissipation holes corresponding to the motor.

10. The drive device applicable to the crawler structure of a toy car according to claim 8, characterized in that, A plurality of connecting shaft columns are respectively protrudingly provided on the inner surface of the first housing corresponding to the positions of the gears in the drive wheel set. The connecting shaft columns are rotatably connected with the respective gears of the drive wheel set; a connecting shaft cavity is provided on the inner surface of the second housing corresponding to the connecting shaft columns, and the connecting shaft cavity is rotatably connected with the connecting shaft columns one by one.

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