Driving device suitable for digging arm structure of toy car

Abstract

The utility model provides a driving device suitable for a digging arm structure of a toy car, which comprises a motor and a transmission wheel set which are in driving connection, and the transmission wheel set is in driving connection with an eccentric wheel. The transmission wheel set comprises a first wheel set fixed to an output shaft of the motor, a second wheel set fixed to the eccentric wheel and a third wheel set meshed between the first wheel set and the second wheel set. Each of the first wheel set and the second wheel set comprises at least one gear which is sequentially meshed, the third wheel set comprises at least two multi-linkage gears which are sequentially meshed, 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, and the large gear and the small gear are coaxially and rotatably connected. A plurality of large gears and small gears of each multi-linkage gear are sequentially distributed at intervals along the axis; in any two adjacent multi-gear gears, the large gear of one multi-gear gear is meshed with the small gear of the other multi-gear gear, and the transmission ratio of the large gear and the small gear of the other multi-gear gear is larger than one.

Description

Technical Field

[0001] The utility model relates to the technical field of toy driving devices, and particularly to a driving device applicable to the digging arm structure of a toy car. Background Art

[0002] There are a wide variety of children's toys, and toy cars are one of them. Patent document CN104648565A provides a children's ride-on toy car. A driving device composed of a motor and a transmission wheel set is installed in the digging arm. The driving device cooperates with a swing rod to drive the small digging arm. The motor drives the transmission wheel set to control the driving eccentric wheel to drive the power output rod to move, thereby driving the swing rod to drive the small arm body to swing.

[0003] However, the transmission wheel set of the above driving device has problems such as low transmission efficiency and unreliable transmission. Moreover, the torque of the transmission wheel set is not large enough, and its occupied volume is also relatively large. Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a driving device applicable to the digging arm structure of a toy car is provided, in order to achieve a more practical value. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a driving device applicable to the digging arm structure of a toy car, aiming to solve the problems of low transmission efficiency, unreliable transmission, small torque, and large occupied volume of the transmission wheel set of the existing toy car digging arm.

[0005] To achieve the foregoing purpose, the utility model provides a driving device applicable to the digging arm structure of a toy car, including a motor and a transmission wheel set that are drivingly connected. The transmission wheel set is drivingly connected to an eccentric wheel. The transmission wheel set includes a first wheel set fixed to the output shaft of the motor, a second wheel set fixed to the eccentric wheel, and a third wheel set meshing between the first wheel set and the second wheel set. Both the first wheel set and the second wheel set include at least one gear that meshes in sequence. The third wheel set includes two multi-stage gears that mesh in sequence. Each multi-stage gear includes at least two transmission teeth that are coaxially and rotatably connected. Each transmission tooth includes a fixed large gear and a small gear. The large gears and small gears of the same multi-stage gear are sequentially spaced along the axis. Among two adjacent multi-stage gears, the large gear of one multi-stage gear meshes with the small gear of the other multi-stage gear, and their transmission ratio is greater than one.

[0006] As a preferred solution, the first wheel set includes a first gear fixed to the output shaft of the motor, and the first gear meshes with the large gear of one of the multi-stage gears.

[0007] As a preferred solution, the second gear set includes a second gear and a third gear. The second gear is a double gear. The large gear of the second gear meshes with the small gear of one of the other multi-gears, and the small gear of the second gear meshes with the third gear.

[0008] As a preferred solution, the transmission ratio between the first gear and the large gear of the multi-gear, the transmission ratio between the large gear of the second gear and the small gear of the multi-gear, and the transmission ratio between the small gear of the second gear and the third gear are all greater than one.

[0009] As a preferred solution, the transmission ratio between the first gear and the large gear of the multi-gear is 11:3, the transmission ratio between the large gear and the small gear of two adjacent multi-gears is 11:6, the transmission ratio between the large gear of the second gear and the small gear of the multi-gear is 17:6, and the transmission ratio between the small gear of the second gear and the third gear is 11:4.

[0010] As a preferred solution, the first gear is a worm gear with 6 worm teeth, the large gear of the transmission gear and the third gear are spur gears with 22 teeth, the small gear of the transmission gear is a spur gear with 12 teeth, the large gear of the second gear is a spur gear with 34 teeth, and the small gear of the second gear is a spur gear with 8 teeth.

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

[0012] As a preferred solution, the motor and the transmission 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 eccentric wheel is rotatably connected in the connecting groove.

[0013] As a preferred solution, a perforation is provided at the bottom of the connecting groove. The diameter of the perforation is slightly larger than the shaft diameter of the end gear in the second gear set; the inner diameter of the connecting groove is slightly larger than the outer diameter of the connecting shaft in the eccentric wheel.

[0014] As a preferred solution, connection holes protruding from their outer surfaces 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.

[0015] The functions and beneficial effects that can be obtained by the present utility model are as follows: The driving device applicable to the digging arm structure of a toy car provided by the present utility model is provided with a third wheel set in the transmission wheel set. The third wheel set is composed of two multi-gear wheels that are meshed in sequence. Each multi-gear wheel 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-gear wheel are distributed at intervals along the axis in sequence. It also makes the large gear and the small gear in two adjacent meshed multi-gear wheels mesh, and the transmission ratio between the two is greater than one. Through the setting of the above multi-gear reduction structure, while the transmission wheel set can efficiently and stably transmit and output the required transmission ratio, it can also effectively increase the torque of the driving device, make the structure more flattened, realize the miniaturization of the driving device, and is more conducive to the layout of each mechanism in the digging arm structure of the 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 the exploded structural diagram of the driving device in

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

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

[0020] In the figure: 1: housing; 11: first housing; 110: connecting groove; 111: perforation; 12: second housing; 13: connecting hole; 14: heat dissipation hole; 2: motor; 3: transmission wheel set; 31: first wheel set; 311: first gear; 32: second wheel set; 321: second gear; 322: third gear; 33: third wheel set; 330: multi-gear wheel; 331: transmission tooth; 4: eccentric wheel; 41: connecting shaft; 42: eccentric shaft. 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 shall fall within the protection scope of the present utility model. It can be understood that the accompanying drawings are only for reference and description, 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 The present embodiment provides a driving device suitable for a toy car digging arm structure, comprising a housing 1, and a motor 2, a transmission wheel group 3 and an eccentric wheel 4 correspondingly mounted on the housing 1. The eccentric wheel 4 is connected to a power output rod of the toy car digging arm structure, and the transmission wheel group 3 is transmission-connected between the motor 2 and the eccentric wheel 4. When the motor 2 is started, the transmission wheel group 3 can drive the eccentric wheel 4 to rotate, thereby driving the power output rod to move back and forth, so as to control the small arm body of the toy car digging arm structure to swing relative to its large arm body, thereby controlling the digging action.

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

[0025] The housing 1 includes a fixed first housing 11 and a second housing 12. A connecting groove 110 is provided on the outer surface of the first housing 11, and the transmission wheel set 3 and the eccentric wheel 4 are rotatably connected in the connecting groove 110. A through hole 111 is provided at the bottom of the connecting groove 110, and the diameter of the through hole 111 is slightly larger than the shaft diameter of the end gear in the transmission wheel set 3, so that the transmission wheel set 3 can pass through the through hole 111 and extend into the connecting groove 110. The inner diameter of the connecting groove 110 is slightly larger than the outer diameter of the connecting shaft in the eccentric wheel 4, so that the eccentric wheel 4 can rotate in the connecting groove 110.

[0026] In this embodiment, the first shell 11 and the second shell 12 are both provided with connection holes 13 protruding from their outer surfaces, and the drive device can be fixed between the two shells through the connection holes 13. The first shell 11 and the second shell 12 are provided with heat dissipation holes 14 corresponding to the motor 2, and the heat dissipation efficiency of the motor 2 can be improved by providing the heat dissipation holes 14. In other embodiments, the connection holes 13 can also be provided only on the first shell 11 or the second shell 12. The shell 1 may also not be provided with the connection holes 13 and / or the heat dissipation holes 14.

[0027] It can be understood that the shaft end of the transmission wheel group 3 extending from the connection groove 110 is configured as a polygonal column, which is used to be plugged and fixed with the connection shaft 41 of the eccentric wheel 4 to achieve circumferential clamping, thereby preventing the transmission wheel group 3 from being unable to drive the eccentric wheel 4 to rotate. When the eccentric wheel 4 is driven to rotate, the eccentric shaft 42 of the eccentric wheel 4 rotates circumferentially around the axis, and cooperates with the power output rod to drive it to reciprocate.

[0028] The transmission wheel group 3 includes a first wheel group 31 fixed to the output shaft of the motor 2, a second wheel group 32 fixed to the eccentric wheel 4, and a third wheel group 33 meshed between the first wheel group 31 and the second wheel group 32. The first wheel group 31 and the second wheel group 32 each include at least one gear meshed in sequence. In this embodiment, the first wheel group 31 includes a first gear 311 fixed to the output shaft of the motor 2. The second wheel group 32 includes a second gear 321 and a third gear 322. The second gear 321 is a double gear and is transmission-connected between the third wheel group 33 and the third gear 322. The shaft end of the third gear 322 extends out of the connecting groove 110 and is plugged and fixed to the connecting shaft 41.

[0029] The third wheel group 33 includes two multi-linked gears 330 meshing in sequence, and each multi-linked gear 330 includes at least two transmission teeth 331 coaxially connected. In the present embodiment, the number of transmission teeth 331 in each multi-linked gear 330 is two. It can be understood that each transmission tooth 331 includes a fixed large gear and a small gear, and the multiple large gears and small gears of the same multi-linked gear 330 are distributed in sequence along the axis. In the two multi-linked gears 330 meshing in sequence, the large gear of one multi-linked gear 330 is meshed with the small gear of another multi-linked gear 330 and the transmission ratio of the two is greater than one. The above arrangement can reduce the speed of the high-speed motor and transmit it to the second wheel group 32, while also increasing the torque of the drive device.

[0030] In this embodiment, the first gear 311 is a worm gear with 6 worm teeth. The first gear 331 is meshed with a large gear of one of the multi-linked gears 330 , and the transmission ratio between the two is greater than 1, which is 11:3.

[0031] The large gear of the second gear 321 is a spur gear with 34 teeth, the small gear of the second gear 321 is a spur gear with 8 teeth, and the third gear 322 is a spur gear with 22 teeth. Among them, the large gear of the second gear 321 meshes with the small gear of another multi-stage gear 330, and the transmission ratio between the two is greater than one, which is 17:6. The small gear of the second gear 321 meshes with the third gear 322, and the transmission ratio between the two is greater than one, which is 11:4.

[0032] The large gear of the transmission gear 331 is a spur gear with 22 teeth, and the small gear of the transmission gear 331 is a spur gear with 12 teeth. That is, the transmission ratio of the large gear to the small gear in two adjacent multi-stage gears 330 is 11:6.

[0033] In other embodiments, the number of teeth of each gear in the transmission wheel set 3 can also be set to other values according to the size of the transmission ratio.

[0034] It can be understood that the setting of the number of teeth of the above-mentioned gears can meet the transmission ratio requirements of each meshing gear pair, and at the same time can effectively improve the torque of the drive device, so that the digging arm of the toy car has excellent acceleration ability and load-bearing capacity. Moreover, the setting of the number of teeth of the above-mentioned gears can set the occupied volume of the transmission wheel set 3 in a reasonable range, making the structure of the drive device compact. Combining 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 the layout of each mechanism in the structure of the toy car digging arm.

[0035] 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 a sub-combination.

Claims

1. A driving device applicable to the digging arm structure of a toy car, comprising a motor and a transmission wheel set that are drivingly connected, and the transmission wheel set is drivingly connected to an eccentric wheel, characterized in that, The drive pulley set includes a first pulley set fixed to the output shaft of the motor, a second pulley set fixed to the eccentric wheel, and a third pulley set meshing between the first pulley set and the second pulley set; both the first pulley set and the second pulley set include at least one gear meshing in sequence, and the third pulley set includes two compound gears meshing in sequence. Each compound 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 of the same compound gear are spaced apart along the axis in sequence; among the two compound gears meshing in sequence, the large gear of one compound gear meshes with the small gear of the other compound gear and their transmission ratio is greater than one.

2. The drive device applicable to the digging arm structure of a toy car according to claim 1, characterized in that, The first pulley set includes a first gear fixed to the output shaft of the motor, and the first gear meshes with the large gear of one of the compound gears.

3. The drive device applicable to the digging arm structure of a toy car according to claim 2, characterized in that, The second pulley set includes a second gear and a third gear. The second gear is a compound gear. The large gear of the second gear meshes with the small gear of the other compound gear, and the small gear of the second gear meshes with the third gear.

4. The drive device applicable to the digging arm structure of a toy car according to claim 3, characterized in that, The transmission ratio between the first gear and the large gear of the compound gear, the transmission ratio between the large gear of the second gear and the small gear of the compound gear, and the transmission ratio between the small gear of the second gear and the third gear are all greater than one.

5. The drive device applicable to the digging arm structure of a toy car according to claim 4, characterized in that, The transmission ratio between the first gear and the large gear of the compound gear is 11:

3. The transmission ratio between the large gear and the small gear of two adjacent compound gears is 11:

6. The transmission ratio between the large gear of the second gear and the small gear of the compound gear is 17:

6. The transmission ratio between the small gear of the second gear and the third gear is 11:

4.

6. The drive device applicable to the digging arm structure of a toy car according to claim 5, characterized in that, The first gear is a worm gear with 6 worm teeth. The large gear of the transmission tooth and the third gear are spur gears with 22 teeth. The small gear of the transmission tooth is a spur gear with 12 teeth. The large gear of the second gear is a spur gear with 34 teeth. The small gear of the second gear is a spur gear with 8 teeth.

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

8. The drive device applicable to the digging arm structure of a toy car according to any one of claims 1-6, characterized in that, The motor and the drive pulley 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 eccentric wheel is rotatably connected in the connection groove.

9. The drive device applicable to the digging arm structure of a toy car according to claim 8, wherein, A through hole is provided at the bottom of the connection groove. The diameter of the through hole is slightly larger than the shaft diameter of the end gear in the second pulley set; the inner diameter of the connection groove is slightly larger than the outer diameter of the connection shaft in the eccentric wheel.

10. The drive device applicable to the digging arm structure of a toy car according to claim 8, characterized in that, Connection holes protruding from the outer surface are provided on the first housing and / or the second housing. Heat dissipation holes are provided on the first housing and the second housing corresponding to the motor.

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