A single drive toy vehicle convertible to a six-wheeled vehicle

Abstract

The utility model provides a single drive toy car of refitting six -wheeled, on the basis of existing four -wheeled toy car still includes third wheel assembly and refitting upgrade support, and the refitting upgrade support fixed mounting is in the car body, and third wheel assembly is detachably connected in refitting upgrade support, thereby upgrading six -wheeled toy car, therefore brings the joy of assembling for the player, the third wheel assembly includes third wheel frame, connecting rod component, third drive link and two third wheels, and connecting rod component is used for connecting third wheel frame and refitting upgrade support, and third wheel frame is equipped with transmission in, and third drive link is used for transmitting the power of drive arrangement to transmission, so one drive arrangement can drive six wheels rotation simultaneously, this not only reduces the quantity of drive arrangement, makes toy car more light and flexible, and the design cost is lower, and can guarantee that each wheel rotates always with the same speed, improves its driving stability, further reduces the probability of car overturning.

Description

Technical Field

[0001] This utility model relates to the field of toy car technology, specifically to a single-drive toy car that can be modified into a six-wheeled vehicle. Background Technology

[0002] Toy cars are a common toy for children and are well-known. Among them, off-road toy cars are especially popular with boys of all ages due to their high entertainment value, cool appearance, and off-road capabilities. However, most existing off-road toy cars have four wheels connected to the body through a shock absorption mechanism to adapt to various terrains. But four-wheeled off-road toy cars have relatively poor stability during driving, are prone to tipping over, and their traction is also affected by the smaller contact area of ​​the wheels and the rugged terrain.

[0003] To address the aforementioned shortcomings, six-wheeled toy vehicles have been designed. For example, patent publication number CN209530094U discloses a six-wheeled toy climbing vehicle, including a shell, a body, a control device, a body extension plate, a first wheel assembly, a second wheel assembly, and a third wheel assembly. The shell and control device are mounted on the body. The front end of the body extension plate is connected to the rear end of the body. The first wheel assembly is connected to the front end of the body, the second wheel assembly is connected to the rear end of the body or the front end of the body extension plate, and the third wheel assembly is connected to the rear end of the body extension plate. Each of the first, second, and third wheel assemblies has three drive devices connected to the control device. This six-wheeled toy climbing vehicle has good driving performance, is stable when moving, and is not prone to tipping over when climbing obstacles. However, neither the four-wheeled toy car nor the patented six-wheeled toy climbing car has the function of being modified, so its fun is relatively weak. Moreover, the patented six-wheeled toy car requires multiple drive devices to work with the control device for driving control, which makes the toy very expensive. It is also easy for the performance of a certain drive device to deteriorate, resulting in a loss of speed and thus affecting the driving performance. At the same time, it is also difficult to control, requiring the simultaneous control of the start and stop of three drive devices, which is not very friendly to young children. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems and shortcomings by providing a single-drive toy car that can be modified to have six wheels, thereby effectively solving the problems of current toy cars being unable to be modified, costing a lot, and being difficult to operate.

[0005] The technical solution of this utility model is implemented as follows: This utility model discloses a convertible six-wheeled single-drive toy car, comprising a vehicle body, a drive unit, a transmission unit, a first wheel assembly, and a second wheel assembly. The drive unit is installed in the middle of the vehicle body, with a front drive rod and a rear drive rod extending from its front and rear ends, respectively. The first wheel assembly is located at the lower front end of the vehicle body, and includes a first wheel frame and two first wheels, with the transmission unit housed within the first wheel frame. The second wheel assembly is located at the lower rear end of the vehicle body, and includes a second wheel frame and two second wheels, with the transmission unit housed within the second wheel frame. The front drive rod is drively connected to the transmission unit within the first wheel frame, and the rear drive rod is connected to the second wheel frame. The transmission device is connected within the vehicle body; characterized in that it further includes a third wheel assembly and a modification and upgrade bracket, the modification and upgrade bracket being fixedly installed on the vehicle body, and the third wheel assembly being detachably connected to the modification and upgrade bracket; the third wheel assembly includes a third wheel frame, a connecting rod assembly, a third drive rod, and two third wheels, the connecting rod assembly being used to connect the third wheel frame to the modification and upgrade bracket, the transmission device being provided inside the third wheel frame, one end of the third drive rod being connected to the transmission device inside the third wheel frame, and the other end of the third drive rod being connected to the transmission device inside the first wheel frame or the second wheel frame, so as to realize that the drive device transmits power to the third wheels.

[0006] In some embodiments, the retrofit and upgrade bracket includes two parallel connecting rods and at least one connecting frame. The connecting rods are provided with multiple connecting positions at intervals. The connecting frame can be selectively installed on one of the connecting positions. The connecting rod assembly is movably connected to the connecting frame.

[0007] Furthermore, the connecting frame is provided with two pairs of connecting feet, and each pair of connecting feet is provided with two sets of vertically staggered connecting holes; the connecting rod assembly includes four connecting rods, one end of each connecting rod is connected to one set of connecting holes, and the other end is connected to the third wheel frame.

[0008] Furthermore, the connecting rod includes a rod body and two rotors. Each rotor includes a central spherical portion and symmetrically arranged cylinders at both ends of the spherical portion with a diameter smaller than that of the spherical portion. A through hole is coaxially provided along the axis of the cylinder, penetrating both sides of the cylinder. Each end of the rod body has a ball-and-socket hole. The spherical portion of the rotor is rotatably fitted into the ball-and-socket hole. The connecting rod is connected to the connecting frame by bolts passing through the connecting hole and the through hole. The third wheel frame has four sets of connecting holes corresponding to the through hole for bolt connection.

[0009] In some embodiments, the first wheel frame or the second wheel frame on which the transmission device connected to the third drive rod is located has an opening, into which the third drive rod extends to achieve a transmission connection with the transmission device.

[0010] Furthermore, the opening is provided with a cover to block the opening, and the third drive rod can extend into the opening and be connected to the transmission device after the cover is opened or removed and the opening is exposed.

[0011] In some embodiments, the transmission device includes a rotating shaft with a large bevel gear and bearings sleeved at both ends of the rotating shaft. The ends of the front drive link and the rear drive link of the driving device are provided with small bevel gears. The small bevel gears mesh with the large bevel gears to enable the driving device to drive the transmission device to rotate. The rotating shaft has an axle hole in the middle, and the wheel axle extends into the axle hole to enable the wheel axle to rotate synchronously with the rotating shaft.

[0012] Furthermore, the third drive rod includes a telescopic part and two rotating parts. The telescopic part includes a sleeve and a rod. The rod is inserted into the sleeve and moves relative to the sleeve along the axial direction. The two rotating parts are respectively connected to the end of the sleeve away from the rod and the end of the rod away from the sleeve via a multi-directional rotating member. The two rotating parts are connected to a third bevel gear at the end away from the multi-directional rotating member. One of the third bevel gears meshes with the large bevel gear of the transmission device in the third wheel frame, and the other third bevel gear meshes with the large bevel gear of the transmission device in the first wheel frame or the second wheel frame.

[0013] In some embodiments, the third wheel assembly further includes a third shock absorber mechanism, which includes a mounting frame and two third suspension rods. The mounting frame is fixedly installed at the rear or front of the vehicle body where the third wheel frame is located, and each of the two third suspension rods is rotatably connected at one end to the mounting frame and at the other end to the third wheel frame.

[0014] In some embodiments, the drive device includes a drive motor, a gearbox, and a shifting device. The drive motor is connected to the gearbox. The front drive lever and the rear drive lever extend from the front and rear ends of the gearbox, respectively. The shifting device cooperates with the rear drive lever. The shifting device has at least a rear drive state that drives the rear drive lever to rotate and a neutral state that disengages from the rear drive lever.

[0015] The beneficial effects of this utility model are: 1. By setting up a modification and upgrade bracket, the original four-wheeled toy car can be modified and upgraded to a six-wheeled toy car. Therefore, a high-performance six-wheeled all-terrain toy car can be easily assembled, which not only brings players the fun of assembly, but also allows them to fully enjoy the fun of off-road driving.

[0016] 2. By using a single drive unit to simultaneously rotate the wheels of the first wheel assembly, the second wheel assembly, and the third wheel assembly, the number of drive units is reduced, making the toy car lighter, more flexible, and with lower design costs. Furthermore, a single drive unit ensures that all wheels rotate at the same speed, improving driving stability and further reducing the probability of tipping over.

[0017] 3. By modifying a four-wheeled toy car into a six-wheeled toy car, the contact area of ​​the wheels and tires is increased, which effectively improves the traction of the toy car on rough terrain and makes it travel more smoothly.

[0018] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention before modification; Figure 2 This is a three-dimensional structural diagram of the modified present invention; Figure 3 This is an exploded view of the modified structure of this utility model; Figure 4 This is an exploded structural diagram of the modified and upgraded bracket of this utility model; Figure 5 This is an exploded structural diagram of the third wheel assembly of this utility model; Figure 6 This is an exploded structural diagram of the connecting rod of this utility model; Figure 7 This is a schematic diagram of the connection structure of the third drive rod of this utility model; Figure 8 This is a three-dimensional structural diagram of the third shock-absorbing mechanism of this utility model; Figure 9 This is an exploded structural diagram of the drive device of this utility model.

[0020] Figure label: Vehicle body 1; Drive unit 2; Front drive linkage 21, rear drive linkage 22, small bevel gear 23, drive motor 24, gearbox 25, shifting device 26; Transmission device 3; Shaft 31, large bevel gear 32, bearing 33, axle hole 34, axle 35; First wheel assembly 4; First wheel frame 41, first wheel 42; Second wheel assembly 5; Second wheel frame 51, second wheel 52, opening 53, cover 54; Third wheel assembly 6; Third wheel frame 61, third wheel 62, connecting rod assembly 63, connecting rod 630, rod body 631, ball socket 6311, rotor 632, ball part 6321, cylinder 6322, through hole 6323, third drive rod 64, sleeve 641, insert rod 642, rotating part 643, multi-directional rotating part 644, third bevel gear 645, bolt 65, through hole cover 66; Upgrade bracket 7; Connecting rod 71, connecting bracket 72, connecting foot 721, connecting hole 722, connecting position 73, screw 74; Third shock absorption mechanism 8; Fixed frame 81, third suspension rod 82. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] 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.

[0025] The following description, in conjunction with the accompanying drawings, describes the present invention: a convertible six-wheeled single-drive toy car.

[0026] like Figure 1 As shown, this utility model relates to a single-drive toy car with six wheels that can be modified, including a car body 1, a drive device 2, a transmission device 3, a first wheel assembly 4, and a second wheel assembly 5. The drive device 2 is installed in the middle of the car body 1, and a front drive rod 21 and a rear drive rod 22 extend from the front end and rear end of the drive device 2, respectively. The first wheel assembly 4 is located at the lower end of the front part of the car body 1. The first wheel assembly 4 includes a first wheel frame 41 and two first wheels 42. The transmission device 3 is provided in the first wheel frame 41, and the two first wheels 42 are rotatably mounted on the first wheel assembly 5. The wheel frame 41 has two ends; the second wheel assembly 5 is located at the lower rear of the vehicle body 1. The second wheel assembly 5 includes a second wheel frame 51 and two second wheels 52. The second wheel frame 51 is also equipped with a transmission device 3. The front drive linkage 21 is connected to the transmission device 3 in the first wheel frame 41, and the rear drive linkage 22 is connected to the transmission device 3 in the second wheel frame 51. Therefore, the power of the drive device 2 can be transmitted to the transmission device 3 of the first wheel assembly 4 and the second wheel assembly 5 through the front and rear drive linkages 22, and then the transmission device 3 drives the wheels to rotate.

[0027] The above structure constitutes a complete four-wheeled toy car, which players can operate and play with. Based on this, this invention also includes a third wheel assembly 6 and a modification and upgrade bracket 7, such as... Figure 2 As shown, the modification and upgrade bracket 7 is fixedly installed on the vehicle body 1. The fixing method can include screw fastening, welding, or plugging. The third wheel assembly 6 is detachably connected to the modification and upgrade bracket 7, thus allowing the toy car to be modified and upgraded into a six-wheeled toy car. Therefore, a high-performance six-wheeled all-terrain toy car can be easily assembled, providing players with not only the fun of assembly but also the enjoyment of off-road driving. Figure 3 and Figure 5As shown, the third wheel assembly 6 includes a third wheel frame 61, a connecting rod assembly 63, a third drive rod 64, and two third wheels 62. The connecting rod assembly 63 is used to connect the third wheel frame 61 to the modification and upgrade bracket 7. The third wheel frame 61 is equipped with a transmission device 3. One end of the third drive rod 64 is connected to the transmission device 3 in the third wheel frame 61, and the other end of the third drive rod 64 is connected to the transmission device 3 in the first wheel frame 41 or the second wheel frame 51. This enables the power of the drive device 2 on the toy car to be transmitted to the third wheels 62. Therefore, this utility model can drive the wheels of the first wheel assembly 4, the second wheel assembly 5, and the third wheel assembly 6 to rotate simultaneously with one drive device 2. This not only reduces the number of drive devices 2, making the toy car lighter and more flexible, and lowering the design cost, but also ensures that each wheel rotates at the same speed, improving its driving stability and further reducing the probability of tipping over.

[0028] Understandably, the third wheel assembly 6 can be installed at the front or rear of the toy car (e.g., ...). Figure 2 (As shown). Therefore, the modification and upgrade bracket 7 can be designed to extend to both the front and rear ends of the toy car, allowing players to choose between front-end or rear-end installation. Furthermore, for ease of modification, the modification and upgrade bracket 7 is located at the bottom of the vehicle body 1, and at least the front and rear parts of the modification and upgrade bracket 7 are exposed. This exposure can be downward, i.e., outside the chassis of the vehicle body 1; or forward or backward, i.e., extending to the front or rear of the vehicle body 1.

[0029] The modification and upgrade bracket 7 can be a single frame, installed on the vehicle body 1 using a convenient disassembly and fixing method. Players can remove it and reinstall it at the front or rear of the toy car as needed, thereby changing the installation position of the third wheel assembly 6. The modification and upgrade bracket 7 can also be... Figure 4 The structure shown in this embodiment, the modification and upgrade bracket 7 includes two parallel connecting rods 71 ​​and at least one connecting frame 72. Multiple connecting positions 73 are spaced apart on the connecting rods 71. The connecting frame 72 can be selectively installed on one of the connecting positions 73. The connecting rod assembly 63 is movably connected to the connecting frame 72. The connecting rods 71 ​​are locked to the bottom of the vehicle body 1 by screws 74. The two ends of the connecting rods 71 ​​extend to the front and rear of the vehicle body 1, respectively. Therefore, the user can choose to install the connecting frame 72 at the front or rear end of the connecting rods 71, thereby adjusting the installation position of the third wheel assembly 6. Furthermore, the connecting rods 71 ​​have multiple connecting positions 73 for the connecting frame 72 to choose from, thus further increasing the freedom of modification and allowing for adjustable relative installation distance of the third wheel assembly 6.

[0030] Understandably, the connecting bracket 72 of the modification and upgrade bracket 7 in this embodiment can be a single one or two. When two are configured, one can be installed at the front and one at the rear of the connecting rod 71, which will make it more convenient for the player to choose the installation position of the third wheel assembly 6.

[0031] Specifically, such as Figure 4 The connection between the modified upgrade bracket 7 and the third wheel assembly 6 in the illustrated embodiment is as follows: The connecting bracket 72 has two pairs of connecting feet 721, and each pair of connecting feet 721 has two sets of vertically staggered connecting holes 722; the connecting rod assembly 63 of the third wheel assembly 6 includes four connecting rods 630, one end of each connecting rod 630 being connected to a set of connecting holes 722, and the other end being connected to the third wheel frame 61. Furthermore, to improve the flexibility of the third wheel frame 61 and avoid the wheel frame being unable to swing or move slightly due to rigid connection, the connecting rod 630 is designed as follows... Figure 6 The structure shown is as follows: The connecting rod 630 includes a rod body 631 and two rotors 632. The rotors 632 include a ball portion 6321 located in the middle and cylinders 6322 with a diameter smaller than that of the ball portion 6321 symmetrically arranged at both ends of the ball portion 6321. A through hole 6323 is provided coaxially along the axis of the cylinders 6322, penetrating the cylinders 6322 on both sides. Each end of the rod body 631 is provided with a ball socket hole 6311. The ball portion 6321 of the rotor 632 is rotatably fitted into the ball socket hole 6311. The connecting rod 630 is connected to the connecting frame 72 by bolts 65 passing through the connecting hole 722 and the through hole 6323. The third wheel frame 61 is also provided with four sets of connecting holes 722 to be connected to the through hole 6323 by bolts 65. With this design, the connecting rod 630 can not only fix the third wheel frame 61 to the toy car, but also allow the connecting rod 71 to swing slightly relative to the third wheel frame 61 and the connecting frame 72, making the third wheel frame 61 more suitable for rugged terrain and ensuring that the two third wheels 62 are always in contact with the ground.

[0032] To facilitate power transmission from the third drive linkage 64, an opening 53 is provided on the first wheel frame 41 or the second wheel frame 51 where the transmission device 3 connected to the third drive linkage 64 is located. Figure 3The illustrated embodiment features an opening 53 on the second wheel frame 51, into which the third drive rod 64 extends, enabling a transmission connection with the transmission device 3. This allows the power transmitted from the drive device 2 to the transmission device 3 on the second wheel frame 51 to be simultaneously transmitted to the third wheel 62 via the third drive rod 64. Furthermore, to prevent mud and sand from easily entering the opening 53 and affecting the performance of the transmission device 3 when the toy car is in four-wheeled mode, a cover 54 is provided to conceal the opening 53. The third drive rod 64 can extend into the opening 53 and connect with the transmission device 3 after the cover 54 is opened or removed, exposing the opening 53. The cover 54 can be threaded onto the opening 53, snapped onto the opening 53, or locked onto the opening 53 with screws.

[0033] The function of the transmission device 3 of this utility model is to transmit the power of the drive device 2 to the wheels. Therefore, the transmission device 3 includes a rotating shaft 31 with a large bevel gear 32 and bearings 33 sleeved at both ends of the rotating shaft 31. The bearings 33 are provided to reduce the friction between the rotating shaft 31 and the wheel frame, thereby improving the driving performance of the toy car. Correspondingly, the ends of the front drive rod 21 and the rear drive rod 22 of the drive device 2 are provided with small bevel gears 23. Through the meshing of the small bevel gears 23 and the large bevel gears 32, the drive device 2 can drive the transmission device 3 to rotate, that is, the rotating shaft 31 can rotate. The rotating shaft 31 has a wheel axle 35 hole 34 in the middle. The wheel axle 35 extends into the wheel axle 35 hole 34 to realize that the wheel axle 35 rotates synchronously with the rotating shaft 31. Figure 7 In the illustrated embodiment, the structures of the front drive linkage 21 and the rear drive linkage 22 are identical to those of the third drive linkage 64. Therefore, the specific structures of the front drive linkage 21 and the rear drive linkage 22 can be found in the third drive linkage 64. This design significantly reduces mold design, thereby further reducing production costs. The transmission devices 3 in the first wheel assembly 4, the second wheel assembly 5, and the third wheel assembly 6 have identical structures, thus reducing mold design and ensuring the synchronization of power transmission.

[0034] like Figure 7As shown, the third drive rod 64 in this embodiment includes a telescopic part and two rotating parts 643. The telescopic part includes a sleeve 641 and a rod 642. The rod 642 is inserted into the sleeve 641 and moves relative to the sleeve 641 along the axial direction. Therefore, it can automatically extend and retract to adapt to the length when the third wheel frame 61 deviates slightly relative to the vehicle body 1, effectively preventing the third drive rod 64 from being torn or unable to extend and retract, thus affecting the adaptive terrain fine-tuning function of the third wheel frame 61. It can be understood that since the third drive rod plays the role of transmitting power, the rotation of the transmission device 3 in the third wheel frame 61 is achieved through its rotation. Therefore, the sleeve 641 and the rod 642 must be designed to ensure that they cannot rotate relative to each other and can only move along the axial direction. Otherwise, it will affect the transmission of power. In this embodiment, the interior of the sleeve 641 is designed as a spline-shaped hole, and the rod 642 is designed as a spline-shaped rod body 631. Two rotating parts 643 are respectively connected to the ends of the sleeve 641 away from the insertion rod 642 and the ends of the insertion rod 642 away from the sleeve 641 via multi-directional rotating members 644. Their rotatable design is also intended to enable the third wheel frame 61 to adapt to different terrains. The multi-directional rotating member 644 can be a swivel ball or a cross-shaped pivot 31. Its lateral axis is rotatably connected to the sleeve 641 or the insertion rod 642, and its vertical axis is rotatably connected to the rotating parts 643. At the ends of the two rotating parts 643 away from the multi-directional rotating member 644, a third bevel gear 645 is connected. One of the third bevel gears 645 meshes with the large bevel gear 32 of the transmission device 3 within the third wheel frame 61, and the other third bevel gear 645 meshes with the large bevel gear 32 of the transmission device 3 within the first wheel frame 41 or the second wheel frame 51. Similarly, to prevent the transmission performance from being affected by mud and sand during the meshing and transmission of the third bevel gear 645 and the large bevel gear 32, this embodiment provides a through-hole cover 66 at the opening 53, so that the shaft end of the third bevel gear 645 passes through the hole of the through-hole cover 66 and extends into the opening 53 to mesh with the large bevel gear 32. At the same time, the through-hole cover 66 is fixedly connected to the second wheel frame 51, thus covering the transmission device 3 and the third bevel gear 645.

[0035] To further improve the ability of the third wheel assembly 6 to adapt to rough terrain, such as Figure 8 As shown, the third wheel assembly 6 in this embodiment also includes a third shock absorption mechanism 8. The third shock absorption mechanism 8 includes a fixing frame 81 and two third suspension rods 82. The fixing frame 81 is fixedly installed at the rear or front of the vehicle body 1 where the third wheel frame 61 is located (in this embodiment, it is installed at the rear of the vehicle body 1). Each of the two third suspension rods 82 has one end rotatably connected to the fixing frame 81 and the other end rotatably connected to the third wheel frame 61. The third suspension rod 82 is similar to the suspension rod structure of existing toy cars and is considered prior art; therefore, it will not be described in detail further.

[0036] The drive device 2 of this invention can achieve bidirectional drive, specifically through two output gears in the gearbox 25. To further improve the controllability of the toy car, for example, it can drive only the two first wheels 42 to rotate, while the second wheel 52 and the third wheel 62 are driven wheels; or it can drive all six wheels to rotate synchronously. Figure 9 In the illustrated embodiment, the drive device 2 includes a drive motor 24, a gearbox 25, and a shifting device 26. The drive motor 24 is connected to the gearbox 25. A front drive lever 21 and a rear drive lever 22 extend from the front and rear ends of the gearbox 25, respectively. The shifting device 26 cooperates with the rear drive lever 22. The shifting device 26 has at least a rear drive state that drives the rear drive lever 22 to rotate and a neutral state that disengages from the rear drive lever 22. The shifting device 26 of this invention includes a shifting servo, a push-pull rod, and a shift sleeve. The shift sleeve can move along the axial direction of the output shaft and rotates 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 shift sleeve. The shifting servo drives the push-pull rod to move the shift sleeve along the axial direction of the output shaft. The end of the push-pull rod connected to the shift servo is located at an eccentric position on the shift servo shaft. When the shift servo shaft rotates, it drives the push-pull rod to rotate eccentrically, causing displacement along its length and thus pushing or pulling the shift sleeve connected to its other end. The applicant has previously filed related patent applications for this drive device, so they will not be elaborated upon here. Because this drive device 2 allows the toy car to freely switch between drive modes, it improves the toy car's controllability, meets the user's operational needs, and fulfills different entertainment requirements in different scenarios.

[0037] 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.

[0038] 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 convertible six-wheeled single-drive toy car, comprising a vehicle body, a drive unit, a transmission unit, a first wheel assembly, and a second wheel assembly; the drive unit is installed in the middle of the vehicle body, and a front drive rod and a rear drive rod extend from the front end and rear end of the drive unit, respectively; the first wheel assembly is located at the lower end of the front position of the vehicle body, and the first wheel assembly includes a first wheel frame and two first wheels, with the transmission unit disposed within the first wheel frame; the second wheel assembly is located at the lower end of the rear position of the vehicle body, and the second wheel assembly includes a second wheel frame and two second wheels, with the transmission unit disposed within the second wheel frame; the front drive rod is drive-connected to the transmission unit within the first wheel frame, and the rear drive rod is drive-connected to the transmission unit within the second wheel frame; Its features are: It also includes a third wheel assembly and a modification and upgrade bracket. The modification and upgrade bracket is fixedly installed on the vehicle body, and the third wheel assembly is detachably connected to the modification and upgrade bracket. The third wheel assembly includes a third wheel frame, a connecting rod assembly, a third drive rod, and two third wheels. The connecting rod assembly is used to connect the third wheel frame to the modification and upgrade bracket. The transmission device is provided in the third wheel frame. One end of the third drive rod is drivenly connected to the transmission device in the third wheel frame, and the other end of the third drive rod is drivenly connected to the transmission device in the first wheel frame or the second wheel frame, so that the drive device can transmit power to the third wheels.

2. The single-drive toy car with six wheels that can be modified according to claim 1, characterized in that, The modification and upgrade bracket includes two parallel connecting rods and at least one connecting frame. The connecting rods are provided with multiple connecting positions at intervals. The connecting frame can be selectively installed on one of the connecting positions. The connecting rod assembly is movably connected to the connecting frame.

3. The single-drive toy car with six wheels that can be modified according to claim 2, characterized in that, The connecting frame is provided with two pairs of connecting feet, and each pair of connecting feet is provided with two sets of vertically staggered connecting holes; the connecting rod assembly includes four connecting rods, one end of each connecting rod is connected to one set of connecting holes, and the other end is connected to the third wheel frame.

4. The single-drive toy car with six wheels that can be modified according to claim 3, characterized in that, The connecting rod includes a rod body and two rotors. Each rotor includes a central spherical portion and symmetrically arranged cylinders at both ends of the spherical portion with a diameter smaller than that of the spherical portion. A through hole is coaxially provided along the axis of the cylinders, penetrating both sides of the cylinders. Each end of the rod body has a ball-and-socket hole. The spherical portion of the rotor is rotatably fitted into the ball-and-socket hole. The connecting rod is connected to the connecting frame by bolts passing through the connecting hole and the through hole. The third wheel frame has four sets of connecting holes corresponding to the through hole for bolt connection.

5. The single-drive toy car with six wheels that can be modified according to claim 1, characterized in that, An opening is provided on the first wheel frame or the second wheel frame where the transmission device connected to the third drive rod is located, and the opening allows the third drive rod to extend into it to achieve a transmission connection with the transmission device.

6. The single-drive toy car with six wheels that can be modified according to claim 5, characterized in that, The opening is provided with a cover to block the opening. After the third drive rod is opened or the cover is removed and the opening is exposed, it can extend into the opening and be connected to the transmission device for transmission.

7. The single-drive toy car with six wheels that can be modified according to claim 1, characterized in that, The transmission device includes a rotating shaft with a large bevel gear and bearings sleeved at both ends of the rotating shaft. The ends of the front drive rod and the rear drive rod of the driving device are provided with small bevel gears. The small bevel gears mesh with the large bevel gears to enable the driving device to drive the transmission device to rotate. The rotating shaft has an axle hole in the middle, and the wheel axle extends into the axle hole to enable the wheel axle to rotate synchronously with the rotating shaft.

8. The single-drive toy car with six wheels that can be modified according to claim 7, characterized in that, The third drive linkage includes a telescopic part and two rotating parts. The telescopic part includes a sleeve and a rod. The rod is inserted into the sleeve and moves relative to the sleeve along the axial direction. The two rotating parts are respectively connected to the end of the sleeve away from the rod and the end of the rod away from the sleeve via a multi-directional rotating member. The two rotating parts are connected to a third bevel gear at the end away from the multi-directional rotating member. One of the third bevel gears meshes with the large bevel gear of the transmission device in the third wheel frame, and the other third bevel gear meshes with the large bevel gear of the transmission device in the first wheel frame or the second wheel frame.

9. The single-drive toy car with six wheels that can be modified according to claim 1, characterized in that, The third wheel assembly also includes a third shock absorption mechanism, which includes a fixed frame and two third suspension rods. The fixed frame is fixedly installed at the rear or front of the vehicle body where the third wheel frame is located. Each of the two third suspension rods is rotatably connected at one end to the fixed frame and at the other end to the third wheel frame.

10. The convertible six-wheeled single-drive toy car according to claim 1, characterized in that, The drive device includes a drive motor, a gearbox, and a shifting device. The drive motor is connected to the gearbox. The front drive lever and the rear drive lever extend from the front and rear ends of the gearbox, respectively. The shifting device cooperates with the rear drive lever. The shifting device has at least a rear drive state that drives the rear drive lever to rotate and a neutral state that disengages from the rear drive lever.

Images