A high-low speed conversion device for a toy

Abstract

This utility model provides a high-low speed conversion device for a toy, including a housing and a motor assembly, as well as a first gear set, a second gear set, an output gear set, and a switching component. The first gear set, the second gear set, and the output gear set are arranged in three rows. The first gear set includes a single gear and at least one first double gear. The second gear set includes at least two second double gears. The gears of the first gear set and the gears of the second gear set are interleaved and meshed. The single gear is driven by the motor assembly. The output gear set includes two output gears that mesh with one of the second double gears of the second gear set. The two output gears are rotatably mounted on an output shaft, and each of their opposite ends is provided with a fitting part. The switching component includes a lever and a positioning member connected to the lever. The positioning member is circumferentially fixed to the output shaft and can be moved and engaged in the fitting part of any output gear under the drive of the lever, so that the output shaft outputs a first speed or a second speed.

Description

Technical Field

[0001] This utility model relates to the field of toy drive device technology, and more particularly to a high-low speed conversion device for toys. Background Technology

[0002] Toys often use gearboxes to control the speed of the toy. For example, Chinese Patent No. CN217977227U discloses a small three-stage gearbox for toy cars. This device uses the meshing of three stages of driving gears and three stages of driven gears to change the output shaft speed, thus achieving a speed-changing function. However, during the gear shifting process, it's impossible to know if the lever is properly engaged, and the lever is prone to slippage, meaning the lever disengages from the engagement point, resulting in no torque output. This leads to poor gear shifting stability and can negatively impact the overall usability of the toy. 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 high-low speed conversion device for toys.

[0004] To achieve the aforementioned objectives, this utility model provides a high-low speed conversion device for a toy, including a housing and a motor assembly, as well as a first gear set, a second gear set, an output gear set, and a switching component. The first gear set, the second gear set, and the output gear set are arranged in three rows. The first gear set includes a single gear and at least one first double gear. The second gear set includes at least two second double gears. The gears of the first gear set and the gears of the second gear set are interleaved and meshed. The single gear is driven by the motor assembly. The output gear set includes two output gears that mesh with one of the second double gears of the second gear set. The two output gears are rotatably mounted on an output shaft, and each of their opposite ends has a meshing portion. The switching component includes a lever and a positioning member connected to the lever. The positioning member is circumferentially fixed to the output shaft and can be moved and engaged in the meshing portion of any of the output gears under the drive of the lever, so that the output shaft outputs a first speed or a second speed.

[0005] As a preferred embodiment, the number of the first double gear is one, and the number of the second double gear is two. The first double gear and the second double gear adopt the same double gear structure, and the double gear is fixedly composed of a large gear and a small gear with different numbers of teeth.

[0006] As a preferred embodiment, the number of teeth of the single gear is the same as the number of teeth of the pinion in the double gear, and the first gear set and the second gear set are connected by a staggered meshing connection of the large gear and the pinion.

[0007] As a preferred embodiment, the two output gears are respectively meshed with the pinions of the two double gears in the second gear set, the ratio of the number of teeth of the large gear and the small gear of the double gear is 3:2, and the ratio of the number of teeth of the small gear of the double gear to the output gear is 2:5.

[0008] As a preferred embodiment, the fitting part includes a groove recessed on one side of the output gear and a plurality of engaging holes formed on the bottom wall of the groove. The positioning member includes two protrusions arranged opposite each other. The protrusions are adapted to the groove and the protrusions have outwardly protruding engaging feet that can be inserted into the engaging holes.

[0009] As a preferred embodiment, the positioning member has a recessed groove between the two protrusions, the groove engaging with the C-shaped head of the lever, and at least a portion of the lever extending out of the housing.

[0010] As a preferred embodiment, the outer casing is provided with a fixed bracket, and a servo motor is fixedly installed in the fixed bracket. The movable end of the servo motor is connected to the lever and is used to drive the lever to move back and forth.

[0011] As a preferred embodiment, a polygonal prism segment is formed in the middle of the output shaft, and the positioning member is movably adapted and connected to the polygonal prism segment.

[0012] As a preferred embodiment, the motor assembly includes a motor, a sun gear fixed to the output shaft of the motor, a planet carrier fixed coaxially with the single gear, and planet gears rotatably connected to the planet carrier. A gear ring is provided on the inner wall of the housing corresponding to the planet gears, and the planet gears mesh with the sun gear and the gear ring.

[0013] As a preferred embodiment, the outer casing includes a first housing and a second housing that are fixedly connected. The first housing has a first cavity and a second cavity that are adjacent to each other and communicate with each other. A motor is fixedly installed at the opening of the first cavity. The gear ring is provided on the inner wall of the first cavity. The second housing is fixedly installed at the opening of the second cavity. The first gear set, the second gear set and the output gear set are arranged in three rows in the second cavity.

[0014] Therefore, based on the technical means of this utility model, the effects that this utility model can achieve are briefly described as follows: The high-low speed conversion device for toys provided by this utility model arranges the first gear set, the second gear set, and the output gear set in three rows inside the housing. Since the first gear set and the second gear set use different gear configurations and are connected by interlocking gear meshing, and the two output gears of the output gear set mesh with one of the double gears of the second gear set, different transmission ratios can be output through the two output gears, thereby enabling the output shaft to output either a first speed or a second speed. Furthermore, since the two output gears are rotatably mounted on the output shaft and both have engaging parts on their opposite ends, when the lever drives the positioning member to move on the output shaft, the positioning member will inevitably engage with the engaging part of either output gear during the movement. This prevents situations where it is impossible to confirm whether the lever is connected in place or where the lever disengages, resulting in no torque output, and ensures that the speed conversion effect of the conversion device is stable and reliable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0016] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the intermediate conversion device.

[0017] Figure 3 for Figure 1 A cross-sectional schematic diagram of the intermediate conversion device.

[0018] Figure 4 for Figure 1 A schematic diagram of the structure in which the output shaft outputs the first rotational speed.

[0019] Figure 5 for Figure 1 A schematic diagram of the structure for outputting the second rotational speed from the output shaft.

[0020] In the diagram: 1: Outer shell; 11: First shell; 111: First cavity; 112: Second cavity; 110: Gear ring; 12: Second shell; 121: Fixed bracket; 2: Motor assembly; 21: Motor; 22: Sun gear; 23: Planet carrier; 24: Planet gear; 3: First gear set; 31: Single gear; 32: First double gear; 4: Second gear set; 41: Second double gear; 5: Output gear set; 51: Output gear; 511: Fitting part; 5111: Groove; 5112: Engaging hole; 6: Switching component; 61: Lever; 611: C-shaped head; 612: Engaging connector; 62: Positioning component; 621: Protrusion; 6211: Engaging foot; 622: Slot; 7: Output shaft; 71: Polygonal prism section; 8: Servo motor. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] Please refer to the following at the same time Figure 1-5 This embodiment provides a high-low speed switching device for a toy, including a housing 1, a motor assembly 2, a first gear assembly 3, a second gear assembly 4, and an output gear assembly 5, all fixedly installed inside the housing 1, a switching component 6 and an output shaft 7 rotatably connected to the housing 1, and a servo motor 8 fixedly installed on the housing 1. In other embodiments, the servo motor 8 may be omitted from the switching device, in which case the switching component 6 is controlled by other power output devices to achieve reciprocating movement, such as an eccentric wheel and a motor.

[0024] The outer casing 1 includes a first casing 11 and a second casing 12 fixedly connected. The first casing 11 and the second casing 12 can be fixedly connected by threaded fasteners or snap-fit ​​fasteners. The first casing 11 has adjacent, communicating cavities 111 and 112. A motor of the motor assembly 2 is fixedly installed at the opening of the first cavity 111. A gear ring 110 is provided on the inner wall of the first cavity 111, which meshes with the planetary gears of the motor assembly 2, thus forming a planetary gear system with the motor assembly 2, achieving a compact structure and stable and efficient power transmission. The second casing 12 is fixedly installed at the opening of the second cavity 112. The second cavity 112 has three rows of gears arranged connecting the first gear set 3, the second gear set 4, and the output gear set 5, further enhancing the compact structure. In this embodiment, a fixed mounting bracket 121 is provided on the outer wall of the second casing 12. A servo motor 8 is fixedly installed in the fixed mounting bracket 121, allowing the movable end of the servo motor 8 to connect with the lever of the switching component 6, driving the lever to reciprocate. In other embodiments, if the switching device eliminates the servo motor 8, the fixing bracket 121 can be correspondingly removed from the outer wall of the second housing 12.

[0025] In this embodiment, the motor assembly 2 includes a motor 21, a sun gear 22 fixed to the output shaft of the motor 21, a planet carrier 23 coaxially fixed to the single gear of the first gear set 3, and planet gears 24 rotatably connected to the planet carrier 23. The entire motor assembly 2 is movably installed within the first cavity 111. The motor 21 is fixedly installed at the opening of the first cavity 111 by means of threaded fasteners or other methods to close the first cavity 111. The planet gears 24 are positioned corresponding to the ring gear 110, and the planet gears 24 mesh with the sun gear 22 and the ring gear 110. When the motor 21 starts, the sun gear 22 rotates accordingly, thereby meshing and driving the planet gears 24 to rotate around the ring gear 110, allowing the planet carrier 23 to rotate continuously at a relatively gentle speed. In other embodiments, the motor assembly 2 may consist of a motor 21 and a spur gear.

[0026] It can be understood that the first gear set 3 includes a single gear 31 and at least one first double gear 32, and the second gear set 4 includes at least two second double gears 41. The single gear 31 is driven by the motor set 2, and the gears of the first gear set 3 and the second gear set 4 are interleaved. The output gear set 5 includes two output gears 51 that mesh with one of the second double gears 41 of the second gear set 4, and the two output gears 51 are rotatably mounted on the output shaft 7. This arrangement allows the two output gears 51 to output different transmission ratios, thereby enabling the output shaft 7 to output a first speed or a second speed, achieving high-speed / low-speed switching.

[0027] Specifically, since the single gear 31 is coaxially fixed with the planetary carrier 23, it can rotate along with the planetary carrier 23 when the motor 21 starts. In this embodiment, there is one first double gear 32 and two second double gears 41. The first double gear 32 and the second double gear 41 are double gears with the same structure, which are fixedly composed of a large gear and a small gear with different numbers of teeth. Meanwhile, the number of teeth on the single gear 31 is the same as the number of teeth on the small gear in the double gear. The first gear set 3 and the second gear set 4 are connected by a staggered meshing connection between the large gear and the small gear. That is, the single gear 31 meshes with the large gear of one of the second double gears 41, the small gear of the second double gear 41 meshes with the large gear of the first double gear 32, and the small gear of the first double gear 32 meshes with the large gear of the other second double gear 41. The two output gears 51 are respectively meshed with the pinions of the two second double gears 41. Therefore, the two transmission ratios output by the two output gears 51 have a significant difference in magnitude, and thus the output shaft 7 can output a first speed and a second speed with significantly different rotational speeds. In other embodiments, the first double gear 32 and the second double gear 41 can be multiple double gears with different tooth ratios. At the same time, multiple double gears in the same gear set can also be selected from multiple double gear structures with different tooth ratios to adjust the required output transmission ratio as needed.

[0028] In this embodiment, the tooth ratio of the large gear to the small gear of the double gear is 3:2, and the tooth ratio of the small gear to the output gear 51 is 2:5. In other embodiments, the tooth ratio of the double gear can be adjusted to other values, and the tooth ratio of the small gear to the output gear 51 can also be adjusted to other values.

[0029] It is understood that each of the two output gears 51 has a fitting part 511 on its opposite end for engaging and fixing the positioning member of the switching assembly 6. The fitting part 511 includes a groove 5111 recessed on one side of the output gear 51 and a plurality of engaging holes 5112 formed on the bottom wall of the groove 5111.

[0030] The switching assembly 6 includes a lever 61 and a positioning member 62 connected to the lever 61. The lever 61 has a C-shaped head 611 and a snap-fit ​​connector 612 fixedly mounted on it. The C-shaped head 611 is used to fix the positioning member 62, and the snap-fit ​​connector 612 extends from the housing 1 to fix the movable end of the servo motor 8. The positioning member 62 is circumferentially fixed to the output shaft 7 and, driven by the lever 61, can move and engage with the engagement portion 511 of any output gear 51, causing the output shaft 7 to output a first speed or a second speed. Specifically, the positioning member 62 includes two opposing protrusions 621, which are adapted to the groove 5111, and each protrusion 621 has an outwardly protruding engagement foot 6211 that can be inserted into the engagement hole 5112. The positioning member 62 has a recessed groove 622 between the two protrusions 621, which engages with the C-shaped head 611 for fixation.

[0031] It is understood that a polygonal prism segment 71 is formed in the middle of the output shaft 7, and the positioning member 62 is movably adapted and connected to the polygonal prism segment 71. Therefore, when the positioning member 62 reciprocates on the output shaft 7, the positioning member 62 can always be kept circumferentially fixed with the output shaft 7 through the polygonal prism segment 71 to ensure that the positioning member 62 can always drive the output shaft 7 to rotate.

[0032] The general workflow of the high-low speed conversion device provided in this embodiment is as follows: Starting the motor 21 causes the sun gear 22 to rotate, driving the planetary gears 24 to rotate within the gear ring 110. This, in turn, drives the single gear 31 to rotate via the planet carrier 23, thereby causing the first gear set 3, the second gear set 4, and the output gear set 5 to rotate accordingly. At this time, activating the servo motor 8 can drive the lever 61 to move, causing the positioning member 62 to move forward or backward on the output shaft 7. This allows any protrusion 621 and engaging foot 6211 on the positioning member 62 to engage with the corresponding engagement portion 511 of the output gear 51, enabling the positioning member 62 to rotate with the corresponding output gear 51, thus causing the output shaft 7 to output a first speed or a second speed. If the servo motor 8 controls the lever 61 to move in the opposite direction, it can move the positioning member 62 to engage with the opposite output gear 51, thereby achieving the purpose of high-low speed conversion.

[0033] 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 high-low speed conversion device for a toy, comprising a housing and a motor group, characterized in that, It also includes a first gear set, a second gear set, an output gear set, and a switching component. The first gear set, the second gear set, and the output gear set are arranged in three rows. The first gear set includes a single gear and at least one first double gear. The second gear set includes at least two second double gears. The gears of the first gear set and the gears of the second gear set are interleaved and meshed. The single gear is driven by the motor set. The output gear set includes two output gears that mesh with one of the second double gears of the second gear set. The two output gears are rotatably sleeved on the output shaft, and both of them have a fitting part on their opposite ends. The switching component includes a lever and a positioning member connected to the lever. The positioning member is circumferentially fixed to the output shaft and can be moved and engaged in the fitting part of any of the output gears under the drive of the lever, so that the output shaft outputs a first speed or a second speed.

2. The high-low speed conversion device for toys according to claim 1, wherein The number of the first double gear is one, and the number of the second double gear is two. The first double gear and the second double gear adopt the same structure of double gear, which is fixedly composed of a large gear and a small gear with different numbers of teeth.

3. The high-low speed conversion device for toys as described in claim 2, characterized in that, The number of teeth of the single gear is the same as the number of teeth of the pinion in the double gear. The first gear set and the second gear set are connected by a staggered meshing connection between the large gear and the pinion.

4. The high-low speed conversion device for toys as described in claim 3, characterized in that, The two output gears are respectively meshed with the pinions of the two double gears in the second gear set. The ratio of the number of teeth of the large gear and the small gear of the double gear set is 3:2, and the ratio of the number of teeth of the small gear of the double gear set to the number of teeth of the output gear is 2:

5.

5. The high-low speed conversion device for a toy as described in claim 1, characterized in that, The fitting part includes a groove recessed on one side of the output gear and a plurality of engaging holes formed on the bottom wall of the groove. The positioning member includes two protrusions arranged opposite each other. The protrusions are adapted to the groove and the protrusions have outwardly protruding engaging feet that can be inserted into the engaging holes.

6. The high-low speed conversion device for a toy as described in claim 5, characterized in that, The positioning member has a recessed groove between the two protrusions, the groove engaging with the C-shaped head of the lever, and at least a portion of the lever protruding from the housing.

7. The high-low speed conversion device for a toy as described in claim 6, characterized in that, The outer casing is provided with a fixed bracket, and a servo motor is fixedly installed in the fixed bracket. The movable end of the servo motor is connected to the lever and is used to drive the lever to move back and forth.

8. The high-low speed conversion device for a toy as described in claim 5, characterized in that, A polygonal prism segment is formed in the middle of the output shaft, and the positioning member is movably adapted to and connected to the polygonal prism segment.

9. The high-low speed conversion device for a toy as described in claim 1, characterized in that, The motor assembly includes a motor, a sun gear fixed to the output shaft of the motor, a planet carrier fixed coaxially with the single gear, and planet gears rotatably connected to the planet carrier. A gear ring is provided on the inner wall of the housing corresponding to the planet gears, and the planet gears mesh with the sun gear and the gear ring.

10. The high-low speed conversion device for a toy as described in claim 9, characterized in that, The outer casing includes a first housing and a second housing that are fixedly connected. The first housing has a first cavity and a second cavity that are adjacent to each other and communicate with each other. A motor is fixedly installed at the opening of the first cavity. The gear ring is provided on the inner wall of the first cavity. The second housing is fixedly installed at the opening of the second cavity. The first gear set, the second gear set and the output gear set are arranged in three rows in the second cavity.

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