Toy car gear box convenient to assemble

Abstract

The toy car gearbox convenient to assemble comprises a shell, a motor and a gear set, the motor and the gear set are fixedly connected in the shell, the gear set is used for being in transmission connection with the motor and a wheel rotating shaft, a first cavity used for installing the motor and a second cavity used for installing the gear set are arranged in the shell, and the first cavity is communicated with the second cavity. A through hole is formed in the end, away from the first cavity, in the second cavity, the two sides of the through hole are each provided with a connecting part, each connecting part comprises a clamping block and a stabilizing block which are sequentially distributed in the axis direction of the wheel rotating shaft, and open grooves are formed in the clamping blocks and the stabilizing blocks; two clamping jaws capable of being elastically opened and closed are further arranged at the notch of the open groove of the clamping block, the wheel rotating shaft can be clamped into the clamping jaws so as to be rotationally connected into the open groove, and at the moment, a transmission gear on the wheel rotating shaft is meshed with the gear set through the through hole.

Description

Technical Field

[0001] This utility model relates to the field of toy car technology, and more particularly to a toy car gearbox that is easy to assemble. Background Technology

[0002] Gearboxes are essential components of toys such as toy cars. Currently, to save costs, most gearbox components in toy cars are made of plastic. During assembly, the gear assembly, shaft, and motor are first placed in their corresponding positions on the housing, and then the housing is fixed in place. Once the housing is fixed, the gear assembly, shaft, and motor are all secured within it. A similar structure is disclosed in Chinese Patent Publication No. CN219501968U for an electric toy car. However, this design suffers from cumbersome wheel assembly and disassembly. Gearbox manufacturers typically can only securely connect the motor, gear set, wheel shaft, and wheel together within the housing after knowing the customer's required wheel structure. This undoubtedly prolongs the gearbox's production and assembly time, resulting in low assembly efficiency. 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 gearbox that is easy to assemble.

[0004] To achieve the aforementioned objectives, this utility model provides a conveniently assembled toy car gearbox, comprising a housing, a motor and a gear set fixedly connected within the housing, the gear set being used for transmission connection between the motor and the wheel axle, the housing having a first chamber for mounting the motor and a second chamber for mounting the gear set, the second chamber having a through hole at one end away from the first chamber, and a connecting portion on each side of the through hole, the connecting portion including a clamping block and a stabilizing block sequentially distributed along the axial direction of the wheel axle, both the clamping block and the stabilizing block having an opening groove, the clamping block also having two elastically opening and closing claws at the opening of its opening groove, the wheel axle being able to be inserted into the claws to be rotatably connected to the opening groove, at which time the transmission gear on the wheel axle meshes with the gear set through the through hole.

[0005] As a preferred embodiment, the shape of the first chamber matches the shape of the motor, and both the upper and lower sides of the first chamber are open structures, with heat dissipation holes respectively provided on the left and right sides of the first chamber.

[0006] As a preferred embodiment, a connecting groove is formed through the end of the first chamber away from the second chamber, and the connecting groove is parallel to the line connecting the two connecting parts and is located on the same horizontal plane.

[0007] As a preferred embodiment, the inner wall of the second chamber is provided with a plurality of shafts for rotatably connecting the connecting shafts of each gear in the gear set, and the side of the shaft opposite to the adjacent gear is provided with a clearance surface.

[0008] As a preferred embodiment, the gear set includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear, and a sixth gear. Except for the first and sixth gears, which are single-linked gears, the other gears are double-linked gears. The first gear is fixed to the output shaft of the motor. The second and third gears are coaxially rotatably connected. The fourth and fifth gears are coaxially rotatably connected. The sixth gear is positioned corresponding to the through hole. The first gear meshes with the second gear, the second gear meshes with the fourth gear, the fourth gear meshes with the third gear, the third gear meshes with the fifth gear, the fifth gear meshes with the sixth gear, and the sixth gear meshes with the transmission gear.

[0009] As a preferred embodiment, the transmission ratios between the first gear and the second gear, the second gear and the fourth gear, the fourth gear and the third gear, and the third gear and the fifth gear are all the same and greater than one, while the transmission ratio between the fifth gear and the sixth gear is less than one.

[0010] As a preferred embodiment, the transmission ratio between the first gear and the second gear is 11:4, the transmission ratio between the fifth gear and the sixth gear is 3:4, and the transmission ratio between the sixth gear and the transmission gear is 1:1.

[0011] As a preferred embodiment, the transmission gear includes a fixed gear and a movable gear. The fixed gear is tightly fitted and fixed to the wheel axle, and the movable gear is movably sleeved on the wheel axle. One side of the movable gear is connected to the limiting block of the wheel axle with an elastic element, and the other side of the movable gear is provided with interlocking tooth surfaces with the fixed gear. The movable gear meshes with the gear set and is controlled to drive the fixed gear to rotate.

[0012] As a preferred embodiment, the housing includes a first housing and a second housing that are detachably connected. The first housing is provided with splicing holes at the junction of its first chamber and the second chamber and at both ends of the first housing. The second housing is provided with splicing posts at positions corresponding to each of the splicing holes for splicing and fixing.

[0013] As a preferred embodiment, the first housing is further provided with a threaded groove at the junction of its first chamber and second chamber, and the second housing is provided with a countersunk hole at the position corresponding to the threaded groove, so that the threaded part can pass through the countersunk hole and be screwed into the threaded groove.

[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 toy car gearbox provided by this utility model, which is easy to assemble, has a through hole at the end of the second chamber. A connecting part is provided on each side of the through hole. Because the connecting part has an opening groove and a pliably opening and closing claw structure, the wheel axle can be securely rotated and connected to the opening groove by inserting it into the claw. At this time, the transmission gear on the wheel axle meshes with the gear set through the through hole, thus enabling the wheel axle to rotate under the transmission of the gear set. This utility model, by improving the housing structure, allows gearbox manufacturers to pre-assemble and fix the housing, motor, and gear set. After knowing the customer's requirements, they only need to insert the wheel axle with the corresponding wheel structure into the two connecting parts to complete the gearbox assembly, thereby significantly improving the assembly efficiency of the gearbox. At the same time, the gearbox structure provided by this utility model also facilitates the replacement of the transmission gear, thereby changing the transmission ratio between the gear set and the transmission gear to meet other production needs of customers and improve practicality. 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 Exploded view of the gearbox.

[0017] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the middle shell.

[0018] Figure 4 for Figure 1 A schematic diagram of the structure of the motor, gear set and wheel axle.

[0019] Figure 5 for Figure 1 A schematic diagram of the intermediate gearbox from a top-down perspective.

[0020] Figure 6 for Figure 1 A cross-sectional view of the intermediate gearbox.

[0021] Figure 7 for Figure 1 A cross-sectional view of the gearbox from another angle.

[0022] In the diagram: 1: Housing; 11: First housing; 111: Assembly hole; 112: Threaded groove; 12: Second housing; 121: Assembly column; 122: Countersunk hole; 10: First chamber; 101: Heat dissipation hole; 102: Connecting groove; 20: Second chamber; 201: Through hole; 202: Connecting part; 2021: Clamping block; 2022: Stabilizing block; 2023: Opening groove; 2024: Claw; 203: Shaft column; 2031: Clearance section; 2: Motor; 3: Gear set; 31: First gear; 32: Second gear; 33: Third gear; 34: Fourth gear; 35: Fifth gear; 36: Sixth gear; 4: Wheel axle; 41: Transmission gear; 411: Fixed gear; 412: Moving gear; 413: Tooth surface; 42: Limiting block; 5: Wheel. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Please refer to the following at the same time Figure 1-7This embodiment provides a toy car gearbox that is easy to assemble, including a housing 1, a motor 2 and a gear set 3 fixedly connected in the housing 1. The gear set 3 is used to drive the motor 2 and the wheel axle 4, so that the motor 2 can control the rotation of the wheel axle 4 through the gear set 3.

[0026] The housing 1 includes a detachably connected first housing 11 and a second housing 12. When the first housing 11 and the second housing 12 are assembled and fixed together, the housing 1 forms a first chamber 10 for mounting the motor 2 and a second chamber 20 for mounting the gear set 3. It is understood that the first housing 11 has assembly holes 111 at the junction of its first chamber 10 and the second chamber 20, as well as at both ends. Correspondingly, the second housing 12 has assembly posts 121 at positions corresponding to each assembly hole 111 for assembly and fixation. During assembly, the gear connecting shafts of the motor 2 and the gear set 3 are placed in the corresponding positions of the first housing 11, and then the assembly posts 121 in the second housing 12 are pressed into the corresponding assembly holes 111, thus quickly assembling and fixing the housing 1, the motor 2, and the gear set 3. In this embodiment, the first housing 11 is further provided with a threaded groove 112 at the junction of its first chamber 10 and second chamber 20. Correspondingly, the second housing 12 is provided with a countersunk hole 122 at the position corresponding to the threaded groove 112, so that screws and other threaded parts can pass through the countersunk hole 122 and be screwed into the threaded groove 112, thereby further fixing the first housing 11 and the second housing 12, and making the assembly structure of housing 1, motor 2 and gear set 3 relatively more stable. In other embodiments, the first housing 11 and the second housing 12 can be detachably fixed only by the splicing hole 111 and the splicing post 121, or the threaded groove 112 and the countersunk hole 122 can be replaced by other structures that can assist in fixing, such as a snap-fit ​​structure, a magnetic structure, etc.

[0027] It is understood that the shape of the first chamber 10 matches the shape of the motor 2, allowing the motor 2 to be securely inserted into the first chamber 10 and preventing it from falling out. Furthermore, the first chamber 10 has openings on both its top and bottom sides, and heat dissipation holes 101 are provided on its left and right sides. These features facilitate heat dissipation and extend the motor's lifespan. In this embodiment, a connecting groove 102 is formed through the end of the first chamber 10 furthest from the second chamber 20. The connecting groove 102 is used to mate with the toy car's outer shell to connect the wheel axle of the follower wheel. In other embodiments, the connecting groove 102 may not be provided on the first chamber 10; in this case, the wheel axle of the follower wheel can be simply inserted into the toy car's outer shell as needed.

[0028] The second chamber 20 has a through hole 201 at one end away from the first chamber 10. A connecting part 202 is provided on each side of the through hole 201. Each connecting part 202 includes a clamping block 2021 and a stabilizing block 2022 sequentially distributed along the axis of the wheel axle 4. The line connecting the two connecting parts 202 is parallel to the connecting groove 102 and located on the same horizontal plane. Both the clamping block 2021 and the stabilizing block 2022 have opening slots 2023. The clamping block 2021 also has two elastically opening and closing claws 2024 at the opening of its opening slot 2023. Because the claws 2024 have elastic opening and closing capabilities, during assembly, force can be applied to clamp the wheel axle 4 into the claws 2024 so that the wheel axle 4 can rotate and connect to the opening slot 2023. At this time, the transmission gear 41 on the wheel axle 4 meshes with the gear set 3 through the through hole 201. It should be noted that the openings 2023 of both the clamping block 2021 and the stabilizing block 2022 are opened facing the ground. When the wheel axle 4 is engaged in the two connecting portions 202, each stabilizing block 2022 is positioned adjacent to one wheel 5. This arrangement, on the one hand, can restrict the movement of the wheel axle 4 in its axial direction to a certain extent, thereby making the connection of the wheel axle 4 in the connecting portion 202 relatively stable; on the other hand, the stabilizing block 2022 can also extend the length of the openings 2023 in the connecting portion 202, which can prevent the wheel axle 4 from rotating arbitrarily to a certain extent, thereby making the connection of the wheel axle 4 in the connecting portion 202 relatively more stable.

[0029] To reduce the overall length of the housing 1 and make the gearbox suitable for smaller toy cars, in this embodiment, the inner wall of the second chamber 20 is provided with multiple shafts 203 for rotatably connecting the gear shafts of each gear in the gear set 3. Some of these shafts 203 have a clearance surface 2031 on the side opposite to the adjacent gear. The clearance surface 2031 can shorten the distance between two adjacent sets of gears, thereby making the distribution of each gear in the gear set 3 more compact. Therefore, the length of the second chamber 20 can be shortened accordingly, thus achieving the purpose of reducing the overall length of the housing 1. In other embodiments, the shafts 203 may not have a clearance surface 2031.

[0030] In this embodiment, the gear set 3 includes a first gear 31, a second gear 32, a third gear 33, a fourth gear 34, a fifth gear 35, and a sixth gear 36. Except for the first gear 31 and the sixth gear 36, which are single gears, the other gears in the gear set 3 are double gears. The first gear 31 is fixed to the output shaft of the motor 2. The second gear 32 and the third gear 33 are coaxially rotatably connected. The fourth gear 34 and the fifth gear 35 are coaxially rotatably connected. The sixth gear 36 is positioned corresponding to the through hole 201. The first gear 31 meshes with the second gear 32, the second gear 32 meshes with the fourth gear 34, the fourth gear 34 meshes with the third gear 33, the third gear 33 meshes with the fifth gear 35, the fifth gear 35 meshes with the sixth gear 36, and the sixth gear 36 meshes with the transmission gear 41. With this structure, when the motor 2 starts, the gears in the gear set 3 can cooperate to drive the transmission gear 41 to rotate, thereby driving the wheel axle 4 to rotate, realizing the movement function of the toy car. In other embodiments, the gear set 3 may consist of other numbers and other arrangements of gears and / or drive belts.

[0031] It is understood that in this embodiment, the transmission ratios of the first gear 31 to the second gear 32, the second gear 32 to the fourth gear 34, the fourth gear 34 to the third gear 33, and the third gear 33 to the fifth gear 35 are all the same and greater than one; specifically, this transmission ratio is 11:4. The transmission ratio of the fifth gear 35 to the sixth gear 36 is less than one; specifically, this transmission ratio is 3:4. The transmission ratio of the sixth gear 36 to the transmission gear 41 is 1:1. This arrangement helps to improve the working stability and reliability of the motor 2 and the gear set 3. In other embodiments, the values ​​of the above transmission ratios can also be adaptively adjusted according to requirements.

[0032] In this embodiment, the transmission gear 41 includes a fixed gear 411 and a movable gear 412. The fixed gear 411 is tightly fitted and fixed to the wheel axle 4, and the movable gear 412 is movably sleeved on the wheel axle 4. An elastic element (such as a spring, not shown in the figure) is connected between one side of the movable gear 412 and the limiting block 42 of the wheel axle 4. The limiting block 42 is disposed on the other side of the movable gear 412 relative to the fixed gear 411. When the wheel axle 4 is engaged in the two connecting parts 202, both the fixed gear 411 and the limiting block 42 are disposed adjacent to a clamping block 2021 to further restrict the movement of the wheel axle 4 in its axial direction. The other side of the movable gear 412 is provided with a toothed surface 413 that engages with the fixed gear 411. The movable gear 412 meshes with the sixth gear 36, and under the push of the elastic element, the movable gear 412 can engage and fix the fixed gear 411 via the tooth surface 413. Therefore, when the motor 2 drives the movable gear 412 to rotate through the gear set 3, the movable gear 412 can controllably drive the fixed gear 411 to rotate, thereby enabling the wheel axle 4 to rotate and drive both wheels 5 to rotate simultaneously. It can be understood that the above-mentioned arrangement of the transmission gear 41 helps to extend the service life of the motor 2. Specifically, even when the wheel 5 is jammed, causing the fixed gear 411 to remain stationary, the movable gear 412 can still be driven to rotate by the gear set 3, thus ensuring that the motor 2 will not burn out due to jamming. In other embodiments, the transmission gear 41 can be configured as a single gear tightly fitted onto the wheel axle 4 and meshing with the gear set 3.

[0033] In summary, the gearbox provided in this embodiment can pre-assemble and fix the housing 1, motor 2 and gear set 3 during the production and assembly process. After knowing the customer's requirements, the gearbox can be assembled simply by inserting the wheel axle 4 with the corresponding wheel structure into the two connecting parts 202, thereby greatly improving the assembly efficiency of the gearbox.

[0034] 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 conveniently assembled toy car gearbox, comprising a housing, a motor and a gear set fixedly connected within the housing, the gear set being used for a transmission connection between the motor and a wheel axle, characterized in that, The housing contains a first chamber for mounting the motor and a second chamber for mounting the gear set. The second chamber has a through hole at one end away from the first chamber. A connecting part is provided on each side of the through hole. The connecting part includes a clamping block and a stabilizing block arranged sequentially along the axis of the wheel shaft. Both the clamping block and the stabilizing block have opening slots. The clamping block also has two elastically opening and closing claws at the opening of its opening slot. The wheel shaft can be inserted into the claws to be rotatably connected to the opening slot. At this time, the transmission gear on the wheel shaft is engaged with the gear set through the through hole.

2. The easily assembled toy car gearbox as described in claim 1, characterized in that, The shape of the first chamber matches the shape of the motor, and both the upper and lower sides of the first chamber are open structures, with heat dissipation holes on the left and right sides of the first chamber respectively.

3. The easily assembled toy car gearbox as described in claim 2, characterized in that, A connecting groove is formed through the end of the first chamber away from the second chamber. The connecting groove is parallel to the line connecting the two connecting parts and is located on the same horizontal plane.

4. The easy-to-assemble toy car gearbox as described in claim 1, characterized in that, The inner wall of the second chamber is provided with a plurality of shafts for rotatably connecting the connecting shafts of each gear in the gear set, and the side of the shaft opposite to the adjacent gear is provided with a clearance surface.

5. The easily assembled toy car gearbox as described in claim 1, characterized in that, The gear set includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear, and a sixth gear. Except for the first gear and the sixth gear, which are single gears, the other gears are double gears. The first gear is fixed to the output shaft of the motor. The second gear and the third gear are coaxially rotatably connected. The fourth gear and the fifth gear are coaxially rotatably connected. The sixth gear is disposed corresponding to the through hole. The first gear meshes with the second gear, the second gear meshes with the fourth gear, the fourth gear meshes with the third gear, the third gear meshes with the fifth gear, the fifth gear meshes with the sixth gear, and the sixth gear meshes with the transmission gear.

6. The easily assembled toy car gearbox as described in claim 5, characterized in that, The transmission ratios between the first gear and the second gear, the second gear and the fourth gear, the fourth gear and the third gear, and the third gear and the fifth gear are all the same and greater than one, while the transmission ratio between the fifth gear and the sixth gear is less than one.

7. The easily assembled toy car gearbox as described in claim 6, characterized in that, The transmission ratio between the first gear and the second gear is 11:4, the transmission ratio between the fifth gear and the sixth gear is 3:4, and the transmission ratio between the sixth gear and the transmission gear is 1:

1.

8. The easily assembled toy car gearbox as described in claim 1, characterized in that, The transmission gear includes a fixed gear and a movable gear. The fixed gear is tightly fitted and fixed to the wheel axle, and the movable gear is movably sleeved on the wheel axle. One side of the movable gear is connected to the limiting block of the wheel axle with an elastic element, and the other side of the movable gear is provided with interlocking tooth surfaces with the fixed gear. The movable gear meshes with the gear set and is controlled to drive the fixed gear to rotate.

9. The easily assembled toy car gearbox as described in claim 1, characterized in that, The housing includes a first housing and a second housing that are detachably connected. The first housing has splicing holes at the junction of its first chamber and the second chamber and at both ends. The second housing has splicing posts that are spliced ​​and fixed to each of the splicing holes.

10. The easy-to-assemble toy car gearbox as described in claim 9, characterized in that, The first housing is provided with a threaded groove at the junction of its first chamber and second chamber, and the second housing is provided with a countersunk hole at the position corresponding to the threaded groove, so that the threaded part can pass through the countersunk hole and be screwed into the threaded groove.

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