Driving device with adjustable gear speed

Abstract

The utility model provides a driving device with adjustable gear speed, which comprises a driving motor and a gearbox, the gearbox comprises a shell and three shaft bodies, the first shaft body is rotatably sleeved with a first gear and a second gear, and the first gear is meshed with a rotating shaft gear of the driving motor; the second shaft body is rotatably sleeved with a third gear and a fourth gear; the third shaft body is rotatably sleeved with a fifth gear and a sixth gear; the gears respectively form two groups of transmission; the device further comprises a gear shifting device, the gear shifting device can be matched with the fifth gear or the sixth gear to drive the third shaft body to rotate, so that the toy or the model is driven to walk at different gear speeds, the same function as that in the prior art can be achieved only through six gears, and meanwhile at least two gear speeds can be adjusted. The structure is simple, the transmission performance is better, the occupied internal space of the toy or the model is small, the size of the toy or the model is effectively reduced, and then the walking performance of the toy or the model is improved.

Description

Technical Field

[0001] The utility model relates to the field of driving devices for toys or models, and particularly relates to a driving device with adjustable gear speeds. Background Art

[0002] The driving device of a toy or model is installed in the toy or model, and the battery outputs electric power to the driving device to drive the toy or model to act. The driving device generally includes a driving motor and a gearbox. The driving motor is in transmission connection with the gearbox, and multiple gears are arranged in the gearbox for transmission.

[0003] At present, some toys or models have variable speed control, which is mainly achieved by the combination of gears in the gearbox. The existing gearbox is generally a two-speed gearbox, that is, the gearbox has two gears that can be switched. Its structure includes a first gear set, a second gear set, a third gear set and a clutch gear. The clutch gear is always meshed with the first gear set, and the second gear set and the third gear set are respectively located on both sides where the clutch gear can move. The first gear set is meshed with the motor shaft of the driving motor, and the second gear set and the third gear set are both separated from the first gear set; when the driving motor rotates forward, it drives the clutch gear to deflect to one side and mesh with the second gear set, thereby executing the first gear speed; when the driving motor rotates in reverse, it drives the clutch gear to deflect to the other side and mesh with the third gear set, thereby executing the second gear speed. The number and size of the gears in the second gear set and the third gear set are different, so as to realize different speeds of the first gear speed and the second gear speed.

[0004] In the above two-speed gearbox, there are at least multiple double gears in the first gear set that play a role in adjusting the motor speed, at least one single gear in the second gear set, and at least two single gears in the third gear set, and the sizes of at least one of these two single gears must be different from the size of the single gear in the second gear set. Therefore, for the existing gearbox, to achieve two-speed adjustment, at least four different specifications of gears are required: double gears, clutch gears, first single gears and second single gears. At the same time, at least four shafts are required to connect these gears, and the total number of gears required is also relatively large. The layout of the gears is relatively scattered, so the volume of the entire gearbox will be relatively large, occupying the internal space of the toy or model, and ultimately resulting in a relatively large volume of the toy or model, high cost, and also affecting the action performance of the toy or model. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a driving device with adjustable gear speeds in view of the above existing problems and deficiencies, so as to effectively solve the problems of complex structure, large size and poor action performance of toys or models in the current market.

[0006] The technical solution of the utility model is realized as follows:

[0007] A driving device with adjustable gear speeds according to the present utility model includes a driving motor and a gearbox. The driving motor is in transmission connection with the gearbox. The gearbox includes a housing, and a first shaft body, a second shaft body, and a third shaft body that are arranged parallel to each other and spaced apart in the housing. It is characterized in that a first gear and a second gear are rotatably sleeved on the first shaft body. The second gear is a double gear with a second large gear and a second small gear. There is a certain distance between the first gear and the second gear, and they rotate relative to the first shaft body respectively. The first gear meshes with the rotating shaft gear of the driving motor; a third gear and a fourth gear are rotatably sleeved on the second shaft body. The third gear is a double gear with a third large gear and a third small gear. The fourth gear is a single gear. There is a certain distance between the third gear and the fourth gear, and they rotate relative to the second shaft body respectively. The first gear meshes with the third large gear, the second large gear of the second gear meshes with the third small gear, and the second small gear meshes with the fourth gear; a fifth gear and a sixth gear are rotatably sleeved on the third shaft body. Both the fifth gear and the sixth gear are single gears. There is a certain distance between the fifth gear and the sixth gear, and they rotate relative to the third shaft body respectively. The fifth gear meshes with the third large gear, and the sixth gear meshes with the fourth gear; a shifting device is further included, and the shifting device can cooperate with the fifth gear or the sixth gear; the third shaft body is in power transmission connection with the walking part of a toy or a model, and after the shifting device cooperates with the fifth gear or the sixth gear, it drives the third shaft body to rotate.

[0008] In some embodiments, the first gear is a double gear with a first large gear and a first small gear. The first large gear meshes with the rotating shaft gear of the driving motor, and the first small gear meshes with the third large gear.

[0009] Further, the first gear, the second gear, and the third gear are double gears with the same structure and size.

[0010] In some embodiments, the fourth gear, the fifth gear, and the sixth gear are single gears with the same structure and size.

[0011] In some embodiments, the first gear, the second gear, the third gear, the fourth gear, the fifth gear, and the sixth gear are all installed in the housing. The first shaft body and the second shaft body are both located in the housing. Both ends of the third shaft body extend out of the housing, and the extending ends of the third shaft body are in power transmission connection with the walking part.

[0012] Further, the housing is mounted and connected to the toy or model in a direction where the axial direction of the third shaft body is the same as the length direction of the toy or model.

[0013] Furthermore, a concave cavity is provided in the housing along the axial direction of the third shaft body. The first gear and the second gear are located on one side of the upper part of the concave cavity, the third gear and the fourth gear are located on the other side of the upper part of the concave cavity, and the fifth gear and the sixth gear are located in the middle of the lower part of the concave cavity.

[0014] In some embodiments, the shifting device includes a servo motor, a push-pull rod, and a shifting sleeve. The shifting sleeve is sleeved on the third shaft body and is located between the fifth gear and the sixth gear. The shifting sleeve can move along the axial direction of the third shaft body and rotate synchronously with the third shaft body. One end of the push-pull rod is connected to the servo motor, and the other end of the push-pull rod is connected to the shifting sleeve. The servo motor drives the push-pull rod to move the shifting sleeve along the axial direction of the third shaft body.

[0015] Further, the shifting sleeve has a first gear position when cooperating with the fifth gear, a second gear position when cooperating with the sixth gear, and a third gear position in the middle where it is disengaged from both the fifth gear and the sixth gear.

[0016] In some embodiments, a hexagonal column is provided at the position where the third shaft body is spaced between the fifth gear and the sixth gear, and a hexagonal hole corresponding to the hexagonal column is provided in the middle of the shifting sleeve.

[0017] The beneficial effects of the present utility model are as follows:

[0018] (1) By adopting three shaft bodies and installing two gears on each shaft body, the overall structure of the gearbox is made more compact, and the gears are kept in a meshing state. Then, through the shifting device, it is switched to cooperate with the fifth gear or the sixth gear to drive the third shaft body to rotate, thereby driving the toy or model to move. Such a design greatly reduces the number of gears. Only six gears are required to achieve the same function as the prior art, and at the same time, at least two gear speeds can be adjusted. The structure is simple, the transmission performance is better, the internal space of the toy or model is occupied less, the volume of the toy or model is effectively reduced, and the moving performance of the toy or model is improved.

[0019] (2) Since there are only two types of gears in the gearbox, one is a double gear and the other is a single gear, and each of these two types of gears can be made into gears with the same structure and size, that is, there can be only two styles of gears in the gearbox, thus reducing the number of mold openings, improving production efficiency, and simplifying the assembly structure.

[0020] The present utility model will be further described below in conjunction with the accompanying drawings. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 2 is an exploded structural schematic diagram of the present utility model;

[0023] Figure 3 is a three-dimensional structural schematic diagram of the present utility model with the housing hidden;

[0024] Figure 4 is an exploded structural schematic diagram of the shift device of the present utility model;

[0025] Figure 5 is an exploded structural schematic diagram of the third shaft body and the shift sleeve of the present utility model;

[0026] Figure 6 is a three-dimensional structural schematic diagram of the connection between the gearbox of the present utility model and a toy or a model.

[0027] Reference Signs:

[0028] Gearbox 1;

[0029] Housing 11, concave cavity 110, first shaft body 12, second shaft body 13, third shaft body 14, hexagonal column 15, support frame 16;

[0030] First gear 2;

[0031] First large gear 21, first small gear 22;

[0032] Second gear 3;

[0033] Second large gear 31, second small gear 32;

[0034] Third gear 4;

[0035] Third large gear 41, third small gear 42;

[0036] Fourth gear 5;

[0037] Fifth gear 6;

[0038] Sixth gear 7;

[0039] Concave position 70;

[0040] Shift device 8;

[0041] Servo 81, rotating part 82, eccentric hole 820, connecting rod 83, push-pull rod 84, through hole 840, retaining piece 841, fork 85, arc-shaped recess 850, shift sleeve 86, recessed part 861, convex block 862, hexagonal hole 863;

[0042] Drive motor 9;

[0043] Rotating shaft gear 91;

[0044] Toy or model 10. Detailed implementation

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or importance.

[0047] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "cooperate", "be connected", "connect", "install" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The speed-adjustable drive device of the present invention will be described below with reference to the drawings.

[0050] As Figures 1 to 3As shown in the figure, the utility model relates to a driving device with adjustable gear speeds, which includes a driving motor 9 and a gearbox 1. The driving motor 9 is in transmission connection with the gearbox 1. The gearbox 1 includes a housing 11, and a first shaft body 12, a second shaft body 13 and a third shaft body 14 that are arranged parallel to each other and at intervals in the housing 11. A first gear 2 and a second gear 3 are rotatably sleeved on the first shaft body 12. The second gear 3 is a double gear with a second large gear 31 and a second small gear 32. There is a certain distance between the first gear 2 and the second gear 3, and they rotate relative to the first shaft body 12 respectively, that is, the first gear 2 and the second gear 3 do not rotate synchronously and at the same speed. The first gear 2 meshes with the shaft gear 91 of the driving motor 9. Therefore, the power of the driving motor 9 is first transmitted to the first gear 2. A third gear 4 and a fourth gear 5 are rotatably sleeved on the second shaft body 13. The third gear 4 is a double gear with a third large gear 41 and a third small gear 42. The fourth gear 5 is a single gear. There is a certain distance between the third gear 4 and the fourth gear 5, and they rotate relative to the second shaft body 13 respectively. The first gear 2 meshes with the third large gear 41. Therefore, the power of the first gear 2 is transmitted to the third gear 4. The second large gear 31 of the second gear 3 meshes with the third small gear 42. The third gear 4 transmits the power to the second gear 3 again. So the rotation speed of the second gear 3 is different from that of the first gear 2. The second small gear 32 meshes with the fourth gear 5. The second gear 3 further transmits the power to the fourth gear. Therefore, the rotation speed of the fourth gear 5 is also different from that of the third gear 4. A fifth gear 6 and a sixth gear 7 are rotatably sleeved on the third shaft body 14. Both the fifth gear 6 and the sixth gear 7 are single gears. There is a certain distance between the fifth gear 6 and the sixth gear 7, and they rotate relative to the third shaft body 14 respectively. The fifth gear 6 meshes with the third large gear 41. That is, in addition to transmitting its power to the second gear 3, the third gear 4 also transmits its power to the fifth gear 6. The sixth gear 7 meshes with the fourth gear 5. Therefore, the power of the sixth gear 7 comes from the fourth gear 5. As can be seen from the above, the above six gears are divided into two groups of transmission gear sets. The first group is: driving motor 9 shaft gear 91 - first gear 2 - third gear 4 - fifth gear 6; The second group is: driving motor 9 shaft gear 91 - first gear 2 - third gear 4 - second gear 3 - fourth gear 5 - sixth gear 7. The rotation speeds of the third shaft body 14 driven by these two groups of transmission gear sets are different.

[0051] The utility model further includes a shifting device 8, which can cooperate with the fifth gear 6 or the sixth gear 7. In addition, the third shaft body 14 is power transmission connected to the running part of the toy or model 10, that is, the power of the third shaft body 14 can be transmitted to the running part of the toy or model 10, so that the toy or model 10 moves. When the shifting device 8 cooperates with the fifth gear 6 or the sixth gear 7, the third shaft body 14 is driven to rotate. It can be seen that the shifting device 8 and the third shaft body 14 rotate synchronously. Therefore, when the shifting device 8 cooperates with the fifth gear 6 or the sixth gear 7, one or more components of the shifting device 8 rotate with the fifth gear 6 or the sixth gear 7, and then drive the third shaft body 14 to rotate.

[0052] Compared with the utility model patent with the authorization announcement number of CN220435335U applied by the applicant, the structure of the present utility model is more compact and small. The prior patent also discloses a gearbox, which has at least seven gears. The two sets of transmission gear sets of the prior patent are respectively: the first set: the first gear - the third gear - the fifth gear, and the second set: the second gear - the fourth gear - the sixth gear. That is, there is no intersection between these two sets of gears. Therefore, to achieve a speed difference between the two sets of transmission gear sets, the transmission ratios of the two sets of transmission gear sets must be different, and the first shaft body needs to rotate synchronously with the first gear and the second gear. This results in more than two types of gears in the gearbox and relatively large energy consumption due to the synchronous rotation of the shaft bodies. Therefore, the structure and performance of the prior patent are relatively poor. The present utility model only uses three shaft bodies and six gears, and installs every two of the six gears on one shaft body, so that the overall structure of the gearbox 1 is more compact, and the gears are all in a meshing state. Then, through the shifting device 8, it is switched to cooperate with the fifth gear 6 or the sixth gear 7 to drive the third shaft body 14 to rotate, so as to drive the toy or model 10 to move forward. Such a design greatly reduces the number of gears. Only six gears are required to achieve the same functions as the prior art, and at the same time, at least two gear speeds can be adjusted. The structure is simple, the transmission performance is better, the internal space of the toy or model 10 is occupied less, the volume of the toy or model 10 is effectively reduced, and the running performance of the toy or model 10 is improved.

[0053] The first gear 2 of the present utility model can be a double-connected gear having a first large gear 21 and a first small gear 22. The first large gear 21 meshes with the shaft gear 91 of the driving motor 9, and the first small gear 22 meshes with the third large gear 41. Of course, the first gear 2 can also be a single-connected gear. The single-connected gear described in the present utility model means that the gear has only one arc surface, and teeth are evenly distributed on this arc surface. The double-connected gear described in the present utility model means that the gear has two arc surfaces with different diameters, and the axes of these two arc surfaces are on the same straight line, and teeth are evenly distributed on each arc surface.

[0054] In order to reduce the types of mold openings for each component during production and lower costs, the first gear 2, the second gear 3, and the third gear 4 of the present utility model are double-connected gears with the same structure and dimensions. The fourth gear 5, the fifth gear 6, and the sixth gear 7 are single-connected gears with the same structure and dimensions. Therefore, there are only two types of gears in the entire transmission 1, so the production is simpler, the production efficiency is improved, and the assembly structure is simplified.

[0055] As Figure 2 shown, the first gear 2, the second gear 3, the third gear 4, the fourth gear 5, the fifth gear 6, and the sixth gear 7 are all installed in the housing 11. The first shaft body 12 and the second shaft body 13 are both located within the housing 11. Both ends of the third shaft body 14 extend outside the housing 11, and the extended ends of the third shaft body 14 are connected to the power transmission of the walking member. Specifically, a concave cavity 110 is provided in the housing 11 of this embodiment along the axial direction of the third shaft body 14. Among them, the first gear 2 and the second gear 3 are located on one side of the upper part of the concave cavity 110, the third gear 4 and the fourth gear 5 are located on the other side of the upper part of the concave cavity 110, and the fifth gear 6 and the sixth gear 7 are located in the middle of the lower part of the concave cavity 110. Therefore, it can be understood that the three shaft bodies (i.e., the first shaft body 12, the second shaft body 13, and the third shaft body 14) are inserted into the concave cavity 110 in a roughly inverted "pin" shape arrangement. Such a design can make the structure of the transmission 1 more compact and the size relatively smaller, so further space occupied inside the toy or model 10 is saved.

[0056] As Figure 6 shown, for the driving device of the present utility model, its installation direction is to install and connect the housing 11 to the toy or model 10 in a direction where the axial direction of the third shaft body 14 is the same as the length direction of the toy or model 10. Regarding the housing 11, its dimension in the axial direction of the third shaft body 14 is the largest relative to its dimensions in the other two directions. Therefore, aligning the direction with the largest dimension with the length direction of the toy or model 10 (generally, the length direction is also the direction with the largest dimension of the toy or model 10) can ensure that the dimensions of the toy or model 10 in the other two directions are not affected by the size of the transmission 1, thereby increasing the design space of the toy or model 10. Therefore, this driving device can also be applied to relatively long and narrow toys or models 10, and has a wide range of applications.

[0057] In order to reduce the design of gears, the shifting device 8 of the present utility model does not use a clutch gear to achieve shifting. The shifting device 8 of the present utility model includes a steering gear 81, a push-pull rod 84, and a shifting sleeve 86. Among them, the shifting sleeve 86 is sleeved on the third shaft body 14 and is located between the fifth gear 6 and the sixth gear 7. The shifting sleeve 86 can move along the axis direction of the third shaft body 14 and rotate synchronously with the third shaft body 14. One end of the push-pull rod 84 is connected to the steering gear 81, and the other end of the push-pull rod 84 is connected to the shifting sleeve 86. Specifically, the end of the push-pull rod 84 connected to the steering gear 81 is connected to the eccentric position of the rotating shaft of the steering gear 81. That is, when the rotating shaft of the steering gear 81 deflects, it drives the push-pull rod 84 to make an eccentric deflection, so that the push-pull rod 84 can generate a displacement in its length direction, so as to push and pull the shifting sleeve 86 connected to its other end. When the push-pull rod 84 is pulled, it drives the shifting sleeve 86 to cooperate with the sixth gear 7. At this time, the third shaft body 14 rotates synchronously with the sixth gear 7. When the push-pull rod 84 is pushed, it drives the shifting sleeve 86 to cooperate with the fifth gear 6. At this time, the third shaft body 14 rotates synchronously with the fifth gear 6.

[0058] It can be understood that the cooperation between the shifting sleeve 86 and the fifth gear 6 or the sixth gear 7 is not through the meshing method, but through the cooperation of convex blocks with convex blocks or the insertion cooperation of the convex block 862 with the concave position 70 and other methods for connection and cooperation.

[0059] In order to further improve the gear shifting function of the driving device, in a certain embodiment, the shifting sleeve 86 has a first gear position when cooperating with the fifth gear 6, a second gear position when cooperating with the sixth gear 7, and a third gear position located in the middle and disengaged from both the fifth gear 6 and the sixth gear 7 at the same time. Among them, the first gear position is the high-speed gear position. Because in this state, the rotating shaft gear 91 of the driving motor 9 is meshed with the large gear of the first gear 2, and the small gear of the first gear 2 is meshed with the large gear of the third gear 4, and the large gear of the third gear 4 is meshed with the fifth gear 6. Therefore, at this time, the power of the driving motor 9 is transmitted to the fifth gear 6 only after two decelerations, so its speed is relatively fast and belongs to the high-speed gear position. The second gear position is the low-speed gear position. In this state, the rotating shaft gear 91 of the driving motor 9 is meshed with the large gear of the first gear 2, and the small gear of the first gear 2 is meshed with the large gear of the third gear 4, the small gear of the third gear 4 is meshed with the large gear of the second gear 3, the small gear of the second gear 3 is meshed with the fourth gear 5 again, and finally the fourth gear 5 is meshed with the sixth gear 7. Therefore, at this time, the power of the driving motor 9 is transmitted to the sixth gear 7 only after four decelerations, so its speed is relatively slow and belongs to the low-speed gear position. The last third gear position is the neutral gear position, that is, in this state, the third shaft body 14 rotates idly with the running inertia of the running part of the toy or model 10.

[0060] In order to make the shifting device 8 shift more smoothly and quickly, in the embodiment shown in Figure 4 , the shifting device 8 of this embodiment includes a steering gear 81, a connecting rod 83, a push-pull rod 84, a shift fork 85 and a shift sleeve 86. Among them, the steering gear 81 and the transmission 1 are connected by a support frame 16, so that the steering gear 81 is integrally connected to the outside of the housing 11 of the transmission 1; a rotating part 82 is sleeved on the rotating shaft of the steering gear 81, and an eccentric hole 820 is provided on the rotating part 82. The connecting rod 83 is a deformable metal wire rod, and one end of it is bent into a "C" shape and then connected to the eccentric hole 820, so that the bent part can deflect in the eccentric hole 820. The other end of the connecting rod 83 is bent into a "C" shape and inserted into a through hole 840 at the end of the push-pull rod 84 away from the steering gear 81. Similarly, the bent part can also deflect in the through hole 840. Therefore, during the rotation of the connecting rod 83 driven by the steering gear 81, although it will sway, because both ends are deflectably connected, the power transmitted to the push-pull rod 84 is only to drive the push-pull rod 84 to move back and forth along its length direction; the push-pull rod 84 is also inserted through the housing 11, and both ends of it extend out of the housing 11 respectively. Since the push-pull rod 84 only has the power to move back and forth, it will not cause large friction with the housing 11 and cause the push-pull rod 84 to jam. The shift fork 85 is a roughly "3"-shaped shifting part, and it has two arc-shaped recesses 850. One of the arc-shaped recesses 850 is matched with the middle arc surface of the push-pull rod 84. The matching method can be fixed into one body, or stop pieces 841 can be provided on both sides of the matching part for blocking and limiting. The other arc surface is lapped with the arc surface of a recess 861 provided in the middle of the shift sleeve 86. Therefore, the arc-shaped recess 850 of the shift fork 85 can only be within the recess 861. When the push-pull rod 84 moves back and forth, it will drive the shift fork 85 to move back and forth, and the shift fork 85 will further drive the shift sleeve 86 to move back and forth; convex blocks 862 are provided on both side surfaces of the shift sleeve 86, and concave positions 70 are provided on the side surface of the corresponding fifth gear 6 and sixth gear 7 facing the shift sleeve 86. The length of the concave position 70 can be longer than the length of the convex block 862, which is more convenient for the convex block 862 to extend into the concave position 70. When the convex block 862 enters the concave position 70, when the shift sleeve 86 rotates, the gears cooperating with it will drive the shift sleeve 86 to rotate synchronously. At this time, since the shift fork 85 only has an arc-shaped recess 850 and an arc surface lapped with the shift sleeve 86, the friction is small and will not affect the rotation speed of the shift sleeve 86, ensuring a stable and fast rotation speed.

[0061] It can be understood that in order to enable the shift sleeve 86 and the third shaft body 14 to move relative to each other and rotate synchronously, as in Figure 5In the illustrated embodiment, a hexagonal column 15 is provided at the position spaced between the fifth gear 6 and the sixth gear 7 on the third shaft body 14, and a hexagonal hole 863 corresponding to the hexagonal column 15 is provided in the middle of the shift sleeve 86. Therefore, synchronous rotation of the two can be achieved, and the shift sleeve 86 can slide smoothly on the hexagonal column 15.

[0062] The toy or model 10 of the present utility model can be a toy car, a remote control model car, an animal model, a toy doll, etc. No limitation is made here.

[0063] In the description of this specification, the description with reference to terms such as "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A driving device with adjustable gear speeds, comprising a driving motor and a gearbox. The driving motor is in transmission connection with the gearbox. The gearbox includes a housing, and a first shaft body, a second shaft body, and a third shaft body that are arranged in parallel and spaced apart from each other in the housing. It is characterized in that, A first gear and a second gear are rotatably sleeved on the first shaft body. The second gear is a double gear having a second large gear and a second small gear. There is a certain distance between the first gear and the second gear, and they each rotate relative to the first shaft body. The first gear meshes with the shaft gear of the driving motor; A third gear and a fourth gear are rotatably sleeved on the second shaft body. The third gear is a double gear having a third large gear and a third small gear. The fourth gear is a single gear. There is a certain distance between the third gear and the fourth gear, and they each rotate relative to the second shaft body. The first gear meshes with the third large gear, the second large gear of the second gear meshes with the third small gear, and the second small gear of the second gear meshes with the fourth gear; A fifth gear and a sixth gear are rotatably sleeved on the third shaft body. Both the fifth gear and the sixth gear are single gears. There is a certain distance between the fifth gear and the sixth gear, and they each rotate relative to the third shaft body. The fifth gear meshes with the third large gear, and the sixth gear meshes with the fourth gear; It further includes a gear shifting device, which can cooperate with the fifth gear or the sixth gear; the third shaft body is in power transmission connection with the walking part of a toy or a model, and after the gear shifting device cooperates with the fifth gear or the sixth gear, it drives the third shaft body to rotate.

2. The driving device with adjustable gear speed according to claim 1, characterized in that, The first gear is a double gear having a first large gear and a first small gear. The first large gear meshes with the shaft gear of the driving motor, and the first small gear meshes with the third large gear.

3. The drive device with adjustable gear speeds according to claim 2, characterized in that, The first gear, the second gear, and the third gear are double gears with the same structure and size.

4. The drive device with adjustable gear speeds according to claim 1, characterized in that, The fourth gear, the fifth gear, and the sixth gear are single gears with the same structure and size.

5. The drive device with adjustable gear speeds according to claim 1, characterized in that, The first gear, the second gear, the third gear, the fourth gear, the fifth gear, and the sixth gear are all installed in the housing. The first shaft body and the second shaft body are both located inside the housing. The two ends of the third shaft body extend outside the housing, and the extending ends of the third shaft body are in power transmission connection with the walking part.

6. The driving device with adjustable gear speed according to claim 5, characterized in that, The housing is installed and connected to the toy or the model in a direction where the axial direction of the third shaft body is the same as the length direction of the toy or the model.

7. The drive device with adjustable gear speed according to claim 6, characterized in that, A concave cavity is provided in the housing along the axial direction of the third shaft body. Among them, the first gear and the second gear are located on one side of the upper part of the concave cavity, the third gear and the fourth gear are located on the other side of the upper part of the concave cavity, and the fifth gear and the sixth gear are located in the middle of the lower part of the concave cavity.

8. The driving device with adjustable gear speed according to claim 1, characterized in that, The shifting device includes a steering gear, a push-pull rod, and a shifting sleeve; the shifting sleeve is sleeved on the third shaft body and is located between the fifth gear and the sixth gear, and the shifting sleeve can move along the axis direction of the third shaft body and rotate synchronously with the third shaft body; one end of the push-pull rod is connected to the steering gear, and the other end of the push-pull rod is connected to the shifting sleeve, and the steering gear drives the push-pull rod to realize the movement of the shifting sleeve along the axis direction of the third shaft body.

9. The driving device with adjustable gear speed according to claim 8, characterized in that, The shifting sleeve has a first gear position when cooperating with the fifth gear, a second gear position when cooperating with the sixth gear, and a third gear position in the middle where it is disengaged from both the fifth gear and the sixth gear simultaneously.

10. The driving device with adjustable gear speed according to claim 8, characterized in that, The third shaft body is provided with a hexagonal column at the position spaced between the fifth gear and the sixth gear, and a hexagonal hole corresponding to the hexagonal column is provided in the middle of the shifting sleeve.

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