Foldable balance car

Abstract

The utility model discloses a foldable balance car which comprises a car body, wheels are connected to the left side and the right side of the car body respectively, the wheels are provided with first driving devices for driving the wheels to rotate, and at least three connecting pieces are hinged between the car body and each wheel. The planes where hinge joints at the two ends of all the connecting pieces connected with each wheel are located are parallel to the end faces of the wheels and perpendicular to the length direction of the vehicle body, and when the vehicle body is closest to the wheels, the wheels are located between the top and the bottom of the vehicle body. Second driving devices for driving at least one connecting piece to rotate up and down around the vehicle body are respectively arranged on the left and right sides of the vehicle body; wheels can be folded to reduce the size, and the height of the balance car can be adjusted to avoid road surface protruding obstacles.

Description

Technical Field

[0001] The utility model relates to a balancing car, in particular to a foldable balancing car Background Art

[0002] As people's environmental awareness increases, the number of electric vehicles is increasing day by day. In addition, more and more people are pursuing more flexible and convenient means of transportation. In addition, ordinary means of transportation can be used in a variety of occasions, are large in size, and occupy a large area; and because the two-wheeled self-balancing vehicle is small in size, it can move in a small space. This highly flexible two-wheeled self-balancing vehicle is more suitable as a means of transportation for people.

[0003] The existing two-wheeled self-balancing vehicle is bulky, occupies a large storage space, and is not easy to fold and carry.

[0004] The Chinese utility model patent with the publication number CN212980438U discloses a wheel folding device for a balancing vehicle. The balancing vehicle includes a wheel mechanism and a pedal mechanism. Each wheel mechanism is provided with a folding device. The folding device includes a rotating folding mechanism and a locking mechanism. The locking mechanism includes a locking mechanism installed on the pedal mechanism. One end of the rotating folding mechanism is rotatably connected to the wheel mechanism, and the other end is rotatably connected to the pedal mechanism. The wheel mechanism is flipped and folded to fit under the pedal mechanism by the rotating folding mechanism. Before flipping, the rotating folding mechanism is locked with the first locking opening of the locking mechanism, and after flipping, the rotating folding mechanism is locked with the second locking opening of the locking mechanism. The folding device of the utility model allows each wheel to be folded separately, reducing the difficulty of folding. When folding, the wheel can be folded with only a small force, and the wheel is close to the pedal after folding, saving storage space. Moreover, since the wheel is horizontal and balanced under the pedal, it is more stable than the folding type balancing vehicle.

[0005] Although the above device realizes the folding of the wheels and reduces the overall size of the balance vehicle, it cannot adjust the distance between the body of the balance vehicle and the ground. When encountering an unavoidable bump on the road in a narrow space, the above device cannot make adjustments to allow the balance vehicle to pass smoothly, and the balance vehicle can only be lifted by people to pass. Summary of the invention

[0006] Purpose of the utility model: The purpose of the utility model is to provide a balancing vehicle which can adjust the height to avoid road bumps and can be folded to reduce the volume.

[0007] Technical solution: The foldable balancing car described in the utility model includes a body, with wheels connected to the left and right sides of the body respectively, the wheels are provided with a first driving device for driving the wheels to rotate, at least three connecting parts are hinged between the body and each wheel, the planes where the hinge points at the left and right ends of all the connecting parts connected to each wheel are located are parallel to the end faces of the wheels and perpendicular to the length direction of the body, when the body is closest to the wheels, the wheels are located between the top and bottom of the body; the left and right sides of the body are provided with a second driving device for driving at least one connecting part to rotate up and down around the body.

[0008] Based on the above technical solution, the wheels can be driven to rotate around the vehicle body by driving the connecting member to rotate through the second driving device. Because there are at least three connecting members, three points can determine a fixed plane. At least three connecting members are set, so the planes where the hinge points at both ends are located can only rotate in the rotation direction of the connecting members, and cannot move in other directions. These two planes are set to be parallel to the end faces of the wheels and perpendicular to the length direction of the vehicle body, that is, the end faces of the wheels can only rotate in the rotation direction of the connecting members and always remain perpendicular to the length direction of the vehicle body. The connecting member drives the wheels to rotate, which actually drives the wheels to translate in the vertical plane, and the end faces of the wheels will not rotate in the horizontal or vertical directions. Therefore, no matter where the wheels rotate, as long as their bottoms can contact the ground, the balance vehicle can drive normally, thereby realizing the height adjustment of the balance vehicle; and the rotation of the wheels can also adjust the horizontal distance between them and the vehicle body, thereby completing the folding of the balance vehicle and reducing the overall size of the balance vehicle.

[0009] Preferably, four connecting pieces are symmetrically arranged on the front and rear sides of the vehicle body, and the connecting pieces on the same side are arranged in parallel up and down.

[0010] Four connecting parts are used, and the overall connection is more stable compared to three connecting parts.

[0011] Preferably, the first driving device is located between the front and rear connecting members.

[0012] The position of the first driving device is set in this way so that the connecting member will not collide with the first driving device during rotation.

[0013] Preferably, the second driving device comprises a plurality of rods and two upper connecting members respectively forming two double rocker mechanisms, wherein the connecting members are slave rockers; the active rockers of the two double rocker mechanisms rotate synchronously.

[0014] The double rocker mechanism is used to adjust the hinge position of the connecting rod and the connecting part. Setting it at a position far away from the hinge between the connecting part and the vehicle body can drive the connecting part to rotate more effortlessly. The distance between the active rocker and the connecting part can also be adjusted to avoid collision between related parts on the wheel and the active rocker and parts driving the active rocker to rotate during rotation.

[0015] Preferably, the connecting member is a bent rod, the upper connecting member protrudes upward, and the lower connecting member protrudes downward.

[0016] The connecting piece is arranged as above, and when the connecting piece rotates toward the vehicle body, the two will not touch each other too early and be unable to rotate, so that it can bring the wheel closer to the vehicle body.

[0017] Preferably, the connecting rod of the second driving device is hinged at the bending point of the connecting member.

[0018] The connecting rod and the connecting piece are hinged here. When the upper connecting piece is completely in contact with the side of the vehicle body, the connecting rod can also be inside the vehicle body to avoid contact with the parts on the wheel. Although the hinge point is set on the side of the connecting piece close to the vehicle body to achieve the above effect, it is more difficult to drive the connecting piece to rotate.

[0019] Preferably, the second driving device further comprises a driving gear and a driven gear meshing with each other, the driving rocker is fixedly connected to the driven gear, and the driven gear is a half gear.

[0020] The use of gear drive can better adjust the transmission ratio, and the use of a half gear for the driven gear can avoid collision with the connecting parts or wheel parts during its rotation.

[0021] Beneficial effects: Compared with the prior art, the utility model has the following beneficial effects: the vehicle body and the wheels are hingedly connected by at least three connecting parts, so that the end faces of the wheels will not rotate in the horizontal or vertical direction during the rotation process, and always maintain the initial state, so that the wheels can be at any height, and the balance vehicle can run normally as long as they can contact the ground. The height of the balance vehicle can be adjusted according to needs, and the wheels can also be folded. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the balance car when it is unfolded;

[0023] Figure 2 This is a schematic diagram of the structure of the balance car when it is folded;

[0024] Figure 3 This is the front view of the balance car when it is unfolded;

[0025] Figure 4 Front view of the balancing car when folded;

[0026] Figure 5 It is a partial schematic diagram of the connection between the balance car and the wheel;

[0027] Figure 6 It is a front view of the second driving device and the wheels when the balancing vehicle is unfolded;

[0028] Figure 7It is a partial structural diagram of the second driving device and the wheels when the balancing vehicle is unfolded;

[0029] Figure 8 It is a schematic diagram of the partial structure of the second driving device and the connecting member when the balancing vehicle is folded. DETAILED DESCRIPTION

[0030] As shown in the figure, the foldable balancing car provided by the utility model includes a body 1, a wheel 2 is connected to the left and right sides of the body 1, the wheel 2 is provided with a first driving device 3, at least three connecting parts 4 are hinged between the body 1 and each wheel 2, and a second driving device is provided on the body 1 for driving at least one connecting part 4 to rotate up and down around the body 1, and the rotation axes of all the connecting parts 4 are parallel to each other.

[0031] The front and rear sides of the vehicle body 1 are symmetrically provided with four connecting members 4, and the connecting members 4 on the same side are arranged in parallel up and down. The two planes at the hinge points at the left and right ends of all the connecting members 4 connecting the same wheel 2 are parallel to the end face of the wheel 2, and the two planes are parallel to each other, so that when all the connecting members 4 rotate, any plane is actually equivalent to the end face of the wheel 2, and it will not rotate in the horizontal direction or the vertical direction, and will always maintain the initial state; the two planes are also equivalent to the end face of the wheel 2 and are also perpendicular to the length direction of the vehicle body 1, so that the end face of the wheel 2 can always remain perpendicular to the length direction of the vehicle body 1, which is equivalent to the wheel 2 always facing straight ahead; when the vehicle body 1 is closest to the wheel 2, the wheel 2 is located between the top and the bottom of the vehicle body 1, that is, when the wheel 2 is closest to the vehicle body 1 and completes folding, the wheel 2 does not exceed the part of the vehicle body in the longitudinal space, and the balancing vehicle not only completes the contraction of the lateral space, but also completes the contraction of the longitudinal space, which can better reduce the size of the entire balancing vehicle.

[0032] When the surface of the vehicle body is parallel to the horizontal plane, the end face of the wheel of the existing balance vehicle will deflect relative to the horizontal plane. It is initially perpendicular to the horizontal plane, and will gradually become parallel to the horizontal plane as it is folded. Although the distance between the vehicle body and the ground can be slightly changed during its rotation, because the contact area between the wheel and the ground is smaller than that when the wheel is not fully unfolded, the wheel surface pressure is large and it is easy to wear. Moreover, when the wheel is not perpendicular to the horizontal plane, the wheel will also exert a squeezing force on the folding mechanism toward the vehicle body through the rotating shaft during the movement of the balance vehicle. Long-term use in this way is also likely to damage the rotating shaft and the folding mechanism.

[0033] The first driving device 3 is located between the front and rear connecting members 4 , and the connecting members 4 can be directly hinged on the front and rear sides of the first driving device 3 .

[0034] When the second driving mechanism drives the multiple connecting members 4 to rotate, the connecting members 4 should be able to rotate synchronously to avoid interference between the connecting members 4 due to different rotation speeds.

[0035] The second driving device includes an active rocker 7 and two connecting rods 8, which respectively form two double rocker mechanisms with two upper connecting pieces 4. The two connecting rods 8 are coaxially hinged on both sides of the active rocker 7, that is, the active rocker 7, the connecting rod 8 and the connecting piece 4 form a double rocker mechanism, and the connecting piece 4 is a slave rocker. Because the two double rocker mechanisms share one active rocker 7, the active rockers 7 of the two double rocker mechanisms rotate synchronously, and when two active rockers 7 are set, it is also necessary to ensure that they rotate synchronously.

[0036] The connecting member 4 is a bent rod, the upper connecting member 4 protrudes upward, and the lower connecting member 4 protrudes downward. In this way, when the connecting member 4 rotates toward the vehicle body 1, that is, upward, the lower connecting member 4 will not touch the hinge of the upper connecting member 4 or the edge of the upper connecting member 4 too early and be unable to rotate because it protrudes downward, ensuring that the connecting member 4 can rotate to the angle closest to the vehicle body 1; the connecting rod 8 of the second driving device is hinged at the bending part of the connecting member 4.

[0037] The second driving device also includes a steering gear 9 with a self-locking mechanism, and two mutually meshing driving gears 5 and a driven gear 6. The two driving gears 5 are connected to the output shaft of the steering gear 9, which can ensure that the two driving gears 5 rotate synchronously, and then ensure that the active rocker 7 rotates synchronously; the two driven gears 6 are coaxially connected to the housing of the steering gear 9, the steering gear 9 is fixed to the vehicle body 1, and the active rocker 7 is fixed to the connecting shaft of the two driven gears 6, and the driven gear 6 is a half gear; it should be noted that only one driving gear 5 and driven gear 6 can also be set, and the steering gear 9 has a self-locking mechanism to ensure that after the wheel 2 is unfolded, the connecting member 4 will not rotate in the opposite direction to fold the wheel 2.

[0038] The steering gear 9 can be provided with corresponding switches on the vehicle body to manually control its start, stop and steering, or it can be controlled by sensors and a single-chip microcomputer.

[0039] The second driving device can also directly use the steering gear 9 to drive the connecting member 4 to rotate.

[0040] The working principle of the utility model is as follows:

[0041] When it is needed, the servo 9 is started to make the active rocker 7 drive the slave rocker, that is, the connecting piece 4, to rotate in the direction away from the vehicle body 1, so that the wheel 2 is away from the vehicle body 1. During this process, the distance between the wheel 2 and the top of the vehicle body 1 will gradually increase, that is, the vehicle body 1 will be raised to a suitable height so that it can avoid raised obstacles on the road surface; when use is over, the servo 9 is controlled to rotate in the opposite direction to drive the wheel 2 to fit the vehicle body 1 to complete the folding.

Claims

1. A foldable balancing vehicle, comprising a vehicle body (1), wherein the vehicle body (1) is connected to wheels (2) on both sides thereof, and the wheels (2) are provided with a first driving device (3) for driving the wheels to rotate, wherein: At least three connecting members (4) are hingedly connected between the vehicle body (1) and each wheel (2); the planes where the hinge points at both ends of all the connecting members (4) connected to each wheel (2) are located are parallel to the end surface of the wheel (2) and perpendicular to the length direction of the vehicle body (1); when the vehicle body (1) and the wheel (2) are closest, the wheel (2) is located between the top and bottom of the vehicle body (1); and a second driving device for driving at least one connecting member (4) to rotate up and down around the vehicle body (1) is provided on each left and right side of the vehicle body (1).

2. A foldable balancing vehicle according to claim 1, characterized in that: Four connecting members (4) are symmetrically arranged on the front and rear sides of the vehicle body (1), and the connecting members (4) on the same side are arranged in parallel up and down.

3. A foldable balancing vehicle according to claim 2, characterized in that: The first driving device (3) is located between the front and rear connecting members (4).

4. A foldable balancing vehicle according to claim 2, characterized in that: The second driving device comprises a plurality of rods and two upper connecting members (4) which respectively form two double rocker mechanisms, wherein the connecting members (4) are slave rockers; and the active rockers (7) of the two double rocker mechanisms rotate synchronously.

5. A foldable balancing vehicle according to claim 4, characterized in that: The connecting piece (4) is a bent rod, the upper connecting piece (4) protrudes upwards, and the lower connecting piece (4) protrudes downwards.

6. A foldable balancing vehicle according to claim 5, characterized in that: The connecting rod (8) of the second driving device is hinged at the bend of the connecting member (4).

7. A foldable balancing vehicle according to claim 4, characterized in that: The second driving device further comprises a driving gear (5) and a driven gear (6) which mesh with each other, the driving rocker (7) is fixedly connected to the driven gear (6), and the driven gear (6) is a half gear.

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