Four-wheel-drive controllable driving device

Abstract

The utility model provides a four-wheel-drive controllable driving device which comprises a driving motor and a gearbox, the gearbox is provided with a front output shaft and a rear output shaft, the four-wheel-drive controllable driving device further comprises two gear shifting devices, the first gear shifting device is matched with the front output shaft, and the second gear shifting device is matched with the rear output shaft. The first gear shifting device and the second gear shifting device both have a driving state and a neutral gear state, so that switching control of a four-wheel drive mode, a front-wheel drive mode or a rear-wheel drive mode can be achieved, the controllability of the toy or the model is improved, the control requirement of a user is met, and different entertainment requirements are met in different scenes; and the rotation directions of the front output shaft and the rear output shaft are opposite, so that the shaft effect during rotation of the front output shaft and the shaft effect during rotation of the rear output shaft are mutually counteracted, the vehicle head is kept stable and does not incline during power driving starting, and the problems that the head of a toy or a model is prone to shaking and the gravity center is unstable during starting are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of drive devices for toys or models, and specifically to a four-wheel drive controllable drive device. Background Technology

[0002] A drive mechanism for a toy or model, installed within the toy or model, uses battery power to drive the toy or model to move. The drive mechanism typically includes a drive motor and a gearbox, with the drive motor and gearbox connected in a transmission connection. The gearbox contains multiple gears for power transmission.

[0003] Currently, some toys or models, especially toy cars or model cars, have four-wheel drive functionality. This means that the output gear in the gearbox drives a driveshaft, and the front and rear ends of this driveshaft mesh with the front and rear axles respectively through gear engagement for synchronous transmission, thus enabling the front and rear wheels of the toy car or model car to rotate simultaneously in the same direction, achieving four-wheel drive. However, the drive mode of these existing toys or models cannot be adjusted or changed. If it is inherently four-wheel drive, it can only maintain the four-wheel drive mode and cannot be switched to front-wheel drive or rear-wheel drive, so users cannot switch the drive mode according to their needs. Furthermore, while four-wheel drive toys or models offer smoother acceleration and are less prone to tipping over compared to front-wheel drive or rear-wheel drive, they require more space to turn or make U-turns. If the space is narrow, turning or making a U-turn cannot be achieved, or multiple back-and-forth movements are required to complete the turn or U-turn. Furthermore, since this type of four-wheel drive toy or model only has one drive shaft, there will be a shaft effect when the drive shaft rotates. Under the influence of this shaft effect, the front head of the toy or model will tilt to the side when the front wheels start, which will cause the toy or model to wobble and become unstable.

[0004] The existing four-wheel drive toys or models cannot switch drive modes, resulting in poor controllability; turning or making U-turns is troublesome, resulting in a poor user experience; and the center of gravity is unstable when starting, thus affecting their driving performance. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems and shortcomings by providing a four-wheel drive controllable drive device, which effectively solves the problems of poor controllability, poor user experience, and poor walking performance of toys or models currently on the market.

[0006] The technical solution of this utility model is implemented as follows:

[0007] This utility model discloses a four-wheel drive controllable drive device, comprising a drive motor and a gearbox. The drive motor is connected to the gearbox for transmission. The gearbox has a front output shaft for controlling the front moving parts of a toy or model and a rear output shaft for controlling the rear moving parts of the toy or model. The device is characterized by further including two shifting devices. A first shifting device cooperates with the front output shaft and has at least a forward-drive state where it engages with a gear on the front output shaft to drive the front output shaft to rotate and a neutral state where it disengages from the gear on the front output shaft to allow the front output shaft to idle. A second shifting device cooperates with the rear output shaft and has a rear-drive state where it engages with a gear on the rear output shaft to drive the rear output shaft to rotate and a neutral state where it disengages from the gear on the rear output shaft to allow the rear output shaft to idle.

[0008] In some embodiments, a front steering device is also included, which is disposed at the front of the toy or model to control the steering of the front moving part. When the first shifting device is in the front drive state and the second shifting device is in the neutral state, the front steering device drives the front moving part to turn so that the toy or model can perform a tank turn.

[0009] In some embodiments, the gearbox includes a high-speed gear set and a low-speed gear set, the transmission ratios of which are different. The output gears in both gear sets are rotatably mounted on the front output shaft relative to it. The first shifting device has a high-speed drive state in which it engages with the output gears of the high-speed gear set to drive the front output shaft to rotate, a low-speed drive state in which it engages with the output gears of the low-speed gear set to drive the front output shaft to rotate, and a neutral state in which it disengages from all the output gears to allow the front output shaft to idle.

[0010] In some embodiments, the gearbox includes a first shaft and a second shaft. A first gear and a second gear are mounted on the first shaft, with a certain distance between them and each rotating relative to the first shaft. A third gear and a fourth gear are mounted on the second shaft, with a certain distance between them and each rotating relative to the second shaft. A fifth gear and a sixth gear are mounted on the front output shaft, with a certain distance between them and each rotating relative to the front output shaft. The first, second, and third gears are all double gears, while the fourth, fifth, and sixth gears are all single gears. The first large gear of the first gear meshes with the shaft gear of the drive motor, and the first small gear of the first gear meshes with the third large gear of the third gear. The third small gear of the third gear meshes with the second large gear of the second gear, and the third large gear meshes with the fifth gear. The second small gear of the second gear meshes with the fourth gear, and the fourth gear meshes with the sixth gear.

[0011] Furthermore, the fourth gear can be replaced with a double gear, wherein the second small gear meshes with the fourth large gear of the fourth gear, and the sixth gear meshes with the fourth small gear of the fourth gear or with the fourth large gear of the fourth gear.

[0012] In some embodiments, a seventh gear that rotates relative to the rear output shaft is mounted on the rear output shaft, and one of the gears, namely the third large gear, the fourth gear, or the linkage gear that rotates synchronously with the front output shaft mounted on the front output shaft, meshes with the seventh gear.

[0013] In some embodiments, the shifting device includes a shifting servo, a push-pull rod, and a shifting sleeve; the shifting sleeve is sleeved on the output shaft, and the shifting sleeve can move along the axial direction of the output shaft and rotate synchronously with the output shaft; one end of the push-pull rod is connected to the shifting servo, and the other end of the push-pull rod is connected to the shifting sleeve, and the shifting servo drives the push-pull rod to realize the movement of the shifting sleeve along the axial direction of the output shaft.

[0014] Furthermore, the shift sleeve of the first shifting device is sleeved on the front output shaft and located at a distance between the fifth gear and the sixth gear. When the shift sleeve is engaged with the fifth gear, the first shifting device is in a high-speed driving state; when the shift sleeve is engaged with the sixth gear, the first shifting device is in a low-speed driving state; when the shift sleeve is disengaged from both the fifth gear and the sixth gear, the first shifting device is in a neutral state.

[0015] Furthermore, the shift sleeve of the second shifting device is sleeved on the rear output shaft and located on one side of the seventh gear. When the shift sleeve is engaged with the seventh gear, the second shifting device is in the rear drive state; when the shift sleeve is disengaged from the seventh gear, the second shifting device is in the neutral state.

[0016] In some embodiments, the gearbox is mounted to the toy or model in the same direction as the length direction of the toy or model, with the axial direction of the front output shaft being the same.

[0017] The beneficial effects of this utility model are:

[0018] (1) Two shifting devices are used to control the rotation of the front output shaft and the rear output shaft respectively. When the two shifting devices drive the front and rear output shafts to output at the same time, the four-wheel drive mode is realized; when only the front output shaft outputs, the front-wheel drive mode is realized; when only the rear output shaft outputs, the rear-wheel drive mode is realized. Therefore, this drive device allows toys or models to switch drive modes at will, thereby improving the controllability of toys or models, meeting the user's control needs, and meeting different entertainment needs in different scenarios.

[0019] (2) Since the drive mode can be switched, it can be combined with the front steering device on the toy or model to realize that the rear output shaft is stationary while the front output shaft and the steering device are driven at the same time to enable the toy or model to turn around like a tank. Therefore, it can enable the toy or model to turn or turn around in narrow places, and is more applicable to different scenarios.

[0020] (3) Since the front output shaft and the rear output shaft rotate in opposite directions, the shaft effect when the front output shaft rotates cancels out the shaft effect when the rear output shaft rotates, thus keeping the front of the car stable and not tilting when starting with power, effectively solving the problem that toys or models are prone to shaking and unstable center of gravity when starting.

[0021] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the four-wheel drive mode of this utility model;

[0024] Figure 3 This is a schematic diagram of the rear-drive configuration of this utility model;

[0025] Figure 4 This is a structural schematic diagram of the front-wheel drive mode or tank turning mode of this utility model;

[0026] Figure 5 This is a schematic diagram of the front steering device of this utility model;

[0027] Figure 6 This is a schematic diagram of the internal structure of the gearbox in the reverse transmission embodiment of this utility model;

[0028] Figure 7 This is an exploded view of the gear shifting device of this utility model;

[0029] Figure 8 This is a three-dimensional structural diagram of the connection between the gearbox of this utility model and a toy or model.

[0030] Figure label:

[0031] Gearbox 1;

[0032] First gear 11, second gear 12, third gear 13, fourth gear 14, fifth gear 15, sixth gear 16, seventh gear 17, linkage gear 18, recess 19;

[0033] Housing 100, first shaft 101, second shaft 102, front output shaft 103, rear output shaft 104, hexagonal column 105;

[0034] Gear shifting device 2;

[0035] First gear shifting device 201, second gear shifting device 202;

[0036] 21. Shift servo motor, 22. Rotating part, 220. Eccentric hole, 23. Connecting rod, 24. Push-pull rod, 240. Through hole, 241. Baffle, 25. Shift fork, 251. Forked part, 252. Vertical rod part, 26. Shift sleeve, 261. Recess, 262. Protrusion, 263.

[0037] Front steering device 3;

[0038] Steering servo 31, rocker arm 32, push rod 33, linkage rod 34, steering sleeve 35;

[0039] Support frame 4;

[0040] Drive motor 5;

[0041] Rotating shaft gear 51;

[0042] Toys or models 6;

[0043] Wheels 61, front axle frame 62. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] In the description of this utility model, it should be understood that the terms "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0046] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "fitting," "connected," "linked," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] The four-wheel drive controllable drive device of this utility model is described below with reference to the accompanying drawings.

[0049] like Figures 1 to 4As shown, this utility model relates to a four-wheel drive controllable drive device, including a drive motor 5 and a gearbox 1. The drive motor 5 is connected to the gearbox 1 in a transmission. The gearbox 1 has a front output shaft 103 that controls the front action of the toy or model 6 and a rear output shaft 104 that controls the rear action of the toy or model 6. Understandably, the front or rear action can be a wheel 61, a swing arm 32, etc. Its features include two shifting devices 2, wherein the first shifting device 201 cooperates with the front output shaft 103, and the first shifting device 201 has at least a front drive state that meshes with the gear on the front output shaft 103 to drive the front output shaft 103 to rotate and a neutral state that disengages from the gear on the front output shaft 103 to allow the front output shaft 103 to idle; the second shifting device 202 cooperates with the rear output shaft 104, and the second shifting device 202 has a rear drive state that meshes with the gear on the rear output shaft 104 to drive the rear output shaft 104 to rotate and a neutral state that disengages from the gear on the rear output shaft 104 to allow the rear output shaft 104 to idle.

[0050] It can also be understood that the gearbox 1 here can control the front output shaft 103 and the rear output shaft 104 respectively, meaning that the rotation of the rear output shaft 104 is not interfered with or controlled by the front output shaft 103. When the front and rear output shafts 104 are controlled by the gearbox 1 respectively, three driving modes can be switched: a four-wheel drive mode when the first shifting device 201 is in front-wheel drive and the second shifting device 202 is in rear-wheel drive; a front-wheel drive mode when the first shifting device 201 is in front-wheel drive and the second shifting device 202 is in neutral; and a rear-wheel drive mode when the first shifting device 201 is in neutral and the second shifting device 202 is in rear-wheel drive. Therefore, this drive device allows the toy or model 6 to switch driving modes at will, thereby improving the controllability of the toy or model 6, meeting the user's control needs, and satisfying different entertainment needs in different scenarios.

[0051] Of course, the gearbox 1 can also transmit power only to the front output shaft 103, while the rear output shaft 104 indirectly transmits power through the front output shaft 103. In this way, if the front output shaft 103 is in an idling state, then the rear output shaft 104 will also be in an idling state. With this connection method, the drive unit only has two drive modes: four-wheel drive and front-wheel drive. Similarly, the opposite connection method can also be used, so that the drive unit only has two drive modes: four-wheel drive and rear-wheel drive.

[0052] like Figure 5As shown, in this embodiment, the drive device further includes a front steering device 3, which is located at the front of the toy or model 6 to control the steering of the front moving part. The front steering device 3 includes a steering servo 31, a swing arm 32, a push rod 33, and a linkage rod 34. The steering servo 31 is fixedly mounted on the front bridge 62 at the front of the toy or model 6. The axial end of the swing arm 32 is connected to the rotating shaft of the steering servo 31. The swing end of the swing arm 32 is connected to one end of the push rod 33. The other end of the push rod 33 is connected to one end of the linkage rod 34. In this embodiment, the front moving part is a wheel 61. The two ends of the linkage rod 34 are respectively connected to the steering sleeves 35 of the two wheels 61. When the steering sleeves 35 deflect, the wheels 61 deflect synchronously. The deflection of the steering sleeves 35 is achieved by the left and right movement of the linkage rod 34. The left and right movement of the linkage rod 34 is controlled by the push rod 33. The steering servo 31 drives the swing arm 32 to swing, which can drive the push rod 33 to control the left and right movement of the linkage rod 34. Therefore, this drive unit can perform the following turning operation: The first shifting device 201 is in front-drive mode, meaning the front wheels 61 remain rotating; while the second shifting device 202 is in neutral mode, meaning the rear wheels 61 stop rotating; then the front steering device 3 is activated, causing the front wheels 61 to turn, thus enabling the toy or model 6 to perform a tank turn. A tank turn refers to a turn on the spot, where the rear wheels are locked, allowing the toy or model 6 to turn in narrow spaces. This design makes it very useful in confined spaces, eliminating the need for back-and-forth movement. The tank turn method allows the toy or model 6 to turn or make a U-turn in narrow spaces, making it more suitable for confined environments. Of course, other conventional turning operations are also possible, such as directly activating the front steering device 3 in four-wheel drive mode to turn the front wheels 61 and achieve a turn or U-turn. Users can make their own judgments and choose the turning or U-turn operation method according to their needs.

[0053] To further improve the driving performance of the drive device, in some embodiments, the gearbox 1 may be equipped with a high-speed gear set and a low-speed gear set. The transmission ratios of these two gear sets are different, so their final output speeds are also divided into high-speed and low-speed. The output gears in both gear sets can be rotated relative to the front output shaft 103 and fitted onto the front output shaft 103. This design allows the first shifting device 201 to have three driving states: ① The first shifting device 201 engages with the output gear of the high-speed gear set to achieve high-speed rotation of the front output shaft 103, i.e., high-speed drive state; ② The first shifting device 201 engages with the output gear of the low-speed gear set to drive the front output shaft 103 to rotate at low speed, i.e., low-speed drive state; ③ The first shifting device 201 is disengaged from all output gears, and the front output shaft 103 rotates freely, i.e., neutral state.

[0054] Understandably, the aforementioned high-speed gear set and low-speed gear set can be two independent gear sets, which are then driven to rotate by the shaft gear 51 of the drive motor 5. Alternatively, they can be as follows: Figures 2 to 4 In the embodiment shown, the gearbox 1 also has a high-speed gear set and a low-speed gear set, but these two gear sets are poorly coupled. Specifically, the gearbox 1 includes a first shaft 101 and a second shaft 102. A first gear 11 and a second gear 12 are mounted on the first shaft 101. The first gear 11 and the second gear 12 are spaced apart and each rotates relative to the first shaft 101, meaning that the first gear 11 and the second gear 12 do not rotate synchronously at the same speed. A third gear 13 and a fourth gear 14 are mounted on the second shaft 102. Gear 13 and fourth gear 14 are spaced apart and each rotates relative to the second shaft 102. A fifth gear 15 and a sixth gear 16 are mounted on the front output shaft 103, also spaced apart and rotating relative to the front output shaft 103. In this embodiment, the first gear 11, second gear 12, and third gear 13 are all double gears, while the fifth gear 15 and sixth gear 16 are single gears. The fourth gear 14 can be either a single gear or a double gear; in this embodiment, a double gear is used. The meshing relationships between these gears are as follows: the first large gear of the first gear 11 meshes with the shaft gear 51 of the drive motor 5; the first small gear of the first gear 11 meshes with the third large gear of the third gear 13; the third small gear of the third gear 13 meshes with the second large gear of the second gear 12, and simultaneously, the third large gear meshes with the fifth gear 15; the second small gear of the second gear 12 meshes with the fourth large gear of the fourth gear 14, and the fourth large gear meshes with the sixth gear 16. As shown above, the six gears are divided into two sets of transmission gears. The first set consists of: drive motor shaft 5 gear 51 - first gear 11 - third gear 13 - fifth gear 15; the second set consists of: drive motor shaft 5 gear 51 - first gear 11 - third gear 13 - second gear 12 - fourth gear 14 - sixth gear 16. The front output shaft 103 driven by these two sets of transmission gears rotates at different speeds; the first set is the high-speed gear set, and the second set is the low-speed gear set.

[0055] In the above embodiment, only the fourth large gear 14 engages in meshing transmission; the fourth small gear does not mesh with any other gear. Therefore, the fourth gear 14 can be a single-gear configuration. However, if a double-gear configuration is used, the sixth gear 16 can mesh with the fourth small gear of the fourth gear 14, resulting in a lower rotational speed for the second set of transmission gears.

[0056] Understandably, the single-coupling gear described in this invention refers to a gear with only one arc surface, on which teeth are evenly distributed. The double-coupling gear described in this invention refers to a gear with two arc surfaces of different diameters, whose axes are collinear, and each arc surface has evenly distributed teeth. To reduce the types of molds required for each component during production and to lower costs, the first gear 11, second gear 12, third gear 13, and fourth gear 14 of this invention are double-coupling gears with identical structure and dimensions. The fifth gear 15 and sixth gear 16 are single-coupling gears with identical structure and dimensions.

[0057] The above embodiment uses only six gears to realize both high-speed and low-speed gear sets, and these six gears have only two specifications, so production is simpler, production efficiency is improved, and the assembly structure is simplified. Moreover, compared with the independent design of two gear sets, the gearbox 1 in this embodiment has a more compact overall structure, and the gears are all in a meshing state. The structure is simple and the transmission performance is better. It occupies less internal space in the toy or model 6, effectively reducing the volume of the toy or model 6, thereby improving the walking performance of the toy or model 6.

[0058] In this invention, a seventh gear 17, rotating relative to the rear output shaft 104, is fitted onto the rear output shaft 104. One of the following gears meshes with the seventh gear 17: the third large gear, the fourth gear 14, or the linkage gear 18 fitted onto the front output shaft 103 that rotates synchronously with the front output shaft 103. If the seventh gear 17 meshes with the third large gear or the fourth gear 14, then the rotation of the rear output shaft 104 is not interfered with or controlled by the front output shaft 103; both can rotate or stop independently. Figure 3 In the embodiment shown, the seventh gear 17 meshes with the fourth gear 14; and if the seventh gear 17 meshes with the linkage gear 18, then the rotation of the rear output shaft 104 is linked to the rotation of the front output shaft 103, as shown. Figure 4 The example shown.

[0059] To achieve mutual cancellation between the shaft effects of the front output shaft 103 and the rear output shaft 104 during rotation, in some embodiments, the rotation directions of the front output shaft 103 and the rear output shaft 104 are opposite, such as... Figure 6In the illustrated embodiment, a linkage gear 18 is sleeved on the front output shaft 103. The linkage gear 18 is synchronously connected to the front output shaft 103. Specifically, a pin is provided on the front output shaft, and this pin engages with a pin groove in the shaft hole of the linkage gear 18. The linkage gear 18 is a single-link gear, designed with a pin groove engaging with a pin, rather than having a polygonal shaft hole. This design ensures that the linkage gear 18 has the same structure as the fifth gear 15 and the sixth gear 16, thereby reducing structural and mold design and simplifying production. The seventh gear 17 on the rear output shaft 104 meshes with the linkage gear 18. The seventh gear 17 is also a single gear, and its structure is the same as that of the linkage gear 18. Therefore, the power of the seventh gear 17 comes from the linkage gear 18. If the linkage gear 18 rotates clockwise with the front output shaft 103, then the seventh gear 17 rotates counterclockwise. Since the seventh gear 17 and the linkage gear 18 are the same size, they rotate at the same speed. Thus, when the second reversing device engages with the seventh gear 17, the rear output shaft 104 will rotate counterclockwise at the same speed as the seventh gear 17. This achieves the opposite rotation directions of the front output shaft 103 and the rear output shaft 104, thereby keeping the front of the vehicle stable and not tilting when starting with power, effectively solving the problem of easy head shaking and unstable center of gravity when starting the toy or model 6.

[0060] To reduce the number of gears, the shifting device 2 of this invention does not use a clutch gear for shifting. Instead, it includes a shifting servo 21, a push-pull rod 24, and a shift sleeve 26. The shift sleeve 26 can move along the axis of the output shaft and rotates synchronously with it. One end of the push-pull rod 24 is connected to the shifting servo 21, and the other end is connected to the shift sleeve 26. The shifting servo 21 drives the push-pull rod 24 to move the shift sleeve 26 along the axis of the output shaft. The end of the push-pull rod 24 connected to the shifting servo 21 is located at an eccentric position on the shaft of the shifting servo 21. When the shaft of the shifting servo 21 deflects, it causes the push-pull rod 24 to deflect eccentrically, resulting in displacement along its length, thus pushing and pulling the shift sleeve 26 connected to its other end.

[0061] For ease of production, the first gear shifting device 201 and the second gear shifting device 202 of this utility model have the same structure. In particular, the shifting sleeve 26 of the first gear shifting device 201 is sleeved on the front output shaft 103 and is located between the fifth gear 15 and the sixth gear 16. When the push-pull rod 24 is pushed, it causes the shift sleeve 26 to engage with the fifth gear 15. At this time, the front output shaft 103 rotates synchronously with the fifth gear 15, and the first shifting device 201 is in a high-speed drive state, with the front output shaft 103 rotating at high speed. When the push-pull rod 24 is pulled, it causes the shift sleeve 26 to engage with the sixth gear 16. At this time, the front output shaft 103 rotates synchronously with the sixth gear 16, and the first shifting device 201 is in a low-speed drive state, with the front output shaft 103 rotating at low speed. When the push-pull rod 24 is in the middle position, it causes the shift sleeve 26 to disengage from both the fifth gear 15 and the sixth gear 16. The first shifting device 201 is in neutral, and the front output shaft 103 rotates freely due to the inertia of the forward-moving component of the toy or model 6.

[0062] The shift sleeve 26 of the second shifting device 202 is sleeved on the rear output shaft 104 and located on one side of the seventh gear 17. When the push-pull rod 24 is pushed, it causes the shift sleeve 26 to engage with the seventh gear 17. At this time, the rear output shaft 104 and the seventh gear 17 rotate synchronously, and the second shifting device 202 is in the rear drive state. When the push-pull rod 24 is pulled, it causes the shift sleeve 26 to disengage from the seventh gear 17. At this time, the second shifting device 202 is in the neutral state, and the rear output shaft 104 rotates freely due to the walking inertia of the rear moving part of the toy or model 6.

[0063] Understandably, the engagement between the shift sleeve 26 and the fifth gear 15, the sixth gear 16, or the seventh gear 17 is not achieved through meshing, but rather through a locking engagement between protrusions 262 and protrusions 262 or an insertion engagement between protrusions 262 and recesses 19.

[0064] To make the shifting device 2 shift gears more smoothly and quickly, in such a way... Figure 7In the illustrated embodiment, the shift device 2 of this embodiment includes a shift actuator 21, a connecting rod 23, a push rod 24, a shift fork 25, and a shift sleeve 26. A support frame 4 is fixedly connected to the outside of the housing 100 of the transmission 1. Two shift actuators 21 are fixedly connected to the support frame 4 side by side by screws. A rotating member 22 is sleeved on the rotating shaft of the shift actuator 21. An eccentric hole 220 is provided on the rotating member 22. The connecting rod 23 is a deformable metal wire rod. One end of the connecting rod 23 is bent into a "匚" shape and then connected to the eccentric hole 220, so that the bent portion can deflect within the eccentric hole 220. The other end of the connecting rod 23 is bent into an "L" shape and inserted into a through hole 240 at the end of the push rod 24 away from the shift actuator 21. Similarly, the bent portion can also deflect within the through hole 240. Therefore, during the rotation of the connecting rod 23 driven by the shift actuator 21, although it will sway and swing, since both ends are deflectably connected, the power transmitted to the push rod 24 is only the power to drive the push rod 24 to move back and forth along its length direction. The push rod 24 also passes through the housing 100, and both ends thereof extend out of the housing 100 respectively. Since the push rod 24 only has the power to move back and forth, it will not generate excessive friction with the housing 100 and cause the push rod 24 to jam. The shift fork 25 is a generally "Y" - shaped shifting member. A circular hole is provided in the vertical rod portion 252 of the shift fork 25. The circular hole is sleeved on the middle part of the push rod 24. A convex step is provided on one side of the push rod 24 to limit the displacement of the shift fork 25 to this side, and a stop piece 241 is provided on the other side of the push rod 24 to limit the displacement of the shift fork 25 to this side. Therefore, the shift fork 25 is limited in the middle of the push rod 24 but can rotate relative to the axis of the push rod 24. The bifurcated part 251 of the shift fork 25 forms an arc - shaped notch, and the arc surface of the arc - shaped notch overlaps with the arc surface of a recessed portion 261 provided in the middle of the shift sleeve 26. Therefore, the bifurcated part of the shift fork 25 can only be within the recessed portion 261. When the push rod 24 moves back and forth, it will drive the shift fork 25 to move back and forth, and the shift fork 25 will further drive the shift sleeve 26 to move back and forth. Convex blocks 262 are provided on both side surfaces of the shift sleeve 26. Corresponding concave positions 19 are provided on the side surface of the fifth gear 15, the sixth gear 16, and the seventh gear 17 facing the shift sleeve 26. The length of the concave position 19 can be longer than the length of the convex block 262, which makes it more convenient for the convex block 262 to extend into the concave position 19. When the convex block 262 enters the concave position 19, when the shift sleeve 26 rotates, the gears cooperating with it will drive the shift sleeve 26 to rotate synchronously. At this time, since the shift fork 25 and the shift sleeve 26 are only in contact with each other through the arc surface of the arc - shaped notch and the arc surface, the friction is small and will not affect the rotational speed of the shift sleeve 26, ensuring a stable and fast rotational speed.

[0065] It can be understood that, in order to enable the shift sleeve 26 and the output shaft to move relatively and rotate synchronously, as in Figure 7In the illustrated embodiment, a hexagonal post 105 is provided at the location of the shift sleeve 26 on the front output shaft 103 or the rear output shaft 104, and a hexagonal hole 263 corresponding to the shift sleeve 26 is provided in the middle to mate with the hexagonal post 105. Therefore, the two can rotate synchronously, and the shift sleeve 26 can slide smoothly on the hexagonal post 105. At the same time, the hexagonal post 105 can also limit gear misalignment.

[0066] like Figure 8 As shown, the drive device of this utility model is installed with the toy or model 6 in the same direction as the axis of the front output shaft 103. The drive device has the largest dimension in the direction of the axis of the front output shaft 103 relative to its dimensions in the other two directions. Therefore, aligning the direction of the largest dimension with the length direction of the toy or model 6 (which is generally also the direction of the largest dimension of the toy or model 6) ensures that the dimensions of the toy or model 6 in the other two directions are not affected by the size of the drive device, thereby increasing the design space for the toy or model 6. Therefore, this drive device is also suitable for relatively long and narrow toys or models 6, and has a wide range of applications.

[0067] The toy or model 6 of this utility model can be a toy car, a remote-controlled model car, an animal model, a toy doll, etc. No limitation is made herein.

[0068] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A four-wheel drive controllable drive device, comprising a drive motor and a gearbox, wherein the drive motor is drive-connected to the gearbox, and the gearbox has a front output shaft for controlling a front actuator of a toy or model and a rear output shaft for controlling a rear actuator of the toy or model, characterized in that, It also includes two shifting devices, wherein the first shifting device cooperates with the front output shaft, and the first shifting device has at least a front drive state that engages with the gear on the front output shaft to drive the front output shaft to rotate and a neutral state that disengages from the gear on the front output shaft to allow the front output shaft to idle; the second shifting device cooperates with the rear output shaft, and the second shifting device has a rear drive state that engages with the gear on the rear output shaft to drive the rear output shaft to rotate and a neutral state that disengages from the gear on the rear output shaft to allow the rear output shaft to idle.

2. The four-wheel drive controllable drive device according to claim 1, characterized in that, It also includes a front steering device, which is disposed at the front of the toy or model to control the steering of the front moving part. When the first shifting device is in the front drive state and the second shifting device is in the neutral state, the front steering device drives the front moving part to turn so that the toy or model can perform a tank turn.

3. The four-wheel drive controllable drive device according to claim 1, characterized in that, The gearbox is provided with a high-speed gear set and a low-speed gear set. The transmission ratios of the two gear sets are different. The output gears in both gear sets can be rotated relative to the front output shaft and sleeved on the front output shaft. The first shifting device has a high-speed drive state in which it engages with the output gear of the high-speed gear set to drive the front output shaft to rotate, a low-speed drive state in which it engages with the output gear of the low-speed gear set to drive the front output shaft to rotate, and a neutral state in which it disengages from all the output gears to allow the front output shaft to idle.

4. The four-wheel drive controllable drive device according to claim 1, characterized in that, The gearbox includes a first shaft and a second shaft. A first gear and a second gear are mounted on the first shaft, with a certain distance between them and each rotating relative to the first shaft. A third gear and a fourth gear are mounted on the second shaft, with a certain distance between them and each rotating relative to the second shaft. A fifth gear and a sixth gear are mounted on the front output shaft, with a certain distance between them and each rotating relative to the front output shaft. The first gear, the second gear, and the third gear are all double gears, while the fourth gear, the fifth gear, and the sixth gear are all single gears. The first large gear of the first gear meshes with the shaft gear of the drive motor; the first small gear of the first gear meshes with the third large gear of the third gear; the third small gear of the third gear meshes with the second large gear of the second gear, and the third large gear meshes with the fifth gear; the second small gear of the second gear meshes with the fourth gear, and the fourth gear meshes with the sixth gear.

5. The four-wheel drive controllable drive device according to claim 4, characterized in that, The fourth gear can be replaced by a double gear, wherein the second small gear meshes with the fourth large gear of the fourth gear, and the sixth gear meshes with the fourth small gear of the fourth gear or with the fourth large gear of the fourth gear.

6. The four-wheel drive controllable drive device according to claim 4, characterized in that, A seventh gear that rotates relative to the rear output shaft is fitted on the rear output shaft. One of the gears, namely the third large gear, the fourth gear, or the linkage gear that rotates synchronously with the front output shaft and is fitted on the front output shaft, meshes with the seventh gear.

7. The four-wheel drive controllable drive device according to claim 6, characterized in that, The shifting device includes a shifting servo, a push-pull rod, and a shifting sleeve; the shifting sleeve is sleeved on the output shaft, and the shifting sleeve can move along the axial direction of the output shaft and rotate synchronously with the output shaft; one end of the push-pull rod is connected to the shifting servo, and the other end of the push-pull rod is connected to the shifting sleeve, and the shifting servo drives the push-pull rod to realize the movement of the shifting sleeve along the axial direction of the output shaft.

8. The four-wheel drive controllable drive device according to claim 7, characterized in that, The shift sleeve of the first shifting device is sleeved on the front output shaft and located at a distance between the fifth gear and the sixth gear. When the shift sleeve is engaged with the fifth gear, the first shifting device is in a high-speed driving state. When the shift sleeve is engaged with the sixth gear, the first shifting device is in a low-speed driving state. When the shift sleeve is disengaged from both the fifth gear and the sixth gear, the first shifting device is in a neutral state.

9. The four-wheel drive controllable drive device according to claim 7, characterized in that, The shift sleeve of the second shifting device is sleeved on the rear output shaft and located on one side of the seventh gear. When the shift sleeve is engaged with the seventh gear, the second shifting device is in the rear drive state. When the shift sleeve is disengaged from the seventh gear, the second shifting device is in the neutral state.

10. The four-wheel drive controllable drive device according to any one of claims 1-9, characterized in that, The gearbox is mounted and connected to the toy or model in the same direction as the length direction of the toy or model, with the axis of the front output shaft aligned with that of the toy or model.

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