TWI873751B - Vehicle body tilt control system - Google Patents

Abstract

A vehicle body tilt control system, comprising: a seat; two linkage assemblies symmetrically arranged on two sides of the seat, each linkage assembly has a swing arm pivotally connected to one side of the seat, and one end of a rocker pivotally connected to a power transmission part of the swing arm, the other end of the swing arm is pivotally connected to a swing block, and the swing block is pivotally connected to one end of a double-ended adapter; and a coupler is located in the seat, with the coupler is respectively pivotally connected to the other end of the double-ended adapter of the two linkage assemblies by two connecting parts, with the coupler has a shaft located between the two connecting parts and pivotally connected to the seat.

Description

Body tilt control system

The present invention mainly relates to a bicycle, and more particularly to a body tilt control system of a bicycle with two rear wheels.

According to common tricycles, the two opposite wheels on the left and right mostly adopt their own lifting and suspension systems; when the vehicle is turning, the three tires and the frame of the tricycle are tilted relative to the ground, and when traveling on uneven roads, the two opposite wheels on the left and right can each move up and down relative to the frame according to the road shape.

However, the known tricycles still often fail to maintain contact with the ground at all times when negotiating a curve or driving on an uneven road surface because the two opposite wheels on the left and right move up and down respectively, resulting in one wheel being suspended in the air and the center of gravity of the vehicle being unstable, leading to an accident of overturning.

In view of this, it is necessary to provide a vehicle body tilt control system to solve the above-mentioned problem.

The object of the present invention is to provide a vehicle body tilt control system, wherein two opposite wheels on the left and right sides of the vehicle can maintain contact with the ground during driving to ensure that both wheels can provide good grip.

A second object of the present invention is to provide a vehicle body tilt control system which is small in size and does not easily restrict the configuration of other components of the tricycle.

To achieve the above-mentioned purpose, the present invention provides a vehicle body tilt control system, comprising: a frame seat, one end of which is pivoted to the rear end of a frame; two linkage assemblies, symmetrically arranged on two sides of the frame seat, each linkage assembly having a swing arm pivoted to one side of the frame seat, one end of a swing arm pivoted to a power transmission part of the swing arm, the other end of the swing arm pivoted to a swing block, and the swing block pivoted to one end of a two-way adapter; and a connecting rod, located in the frame seat, and pivoted to the other ends of the two-way adapters of the two linkage assemblies by two connecting parts, respectively, and a pivot shaft is located between the two connecting parts and pivoted to the frame seat.

In some embodiments, the frame seat may have a chamber for accommodating the connecting rod, a central positioning bar may be located in the chamber and may divide the chamber into two opposite working spaces on the left and right, wherein a swing block and a two-way adapter of one linkage assembly may be located in one of the working spaces, and a swing block and a two-way adapter of another linkage assembly may be located in the other working space.

In some embodiments, the rocker arm may have an extension rod and a crank arm located outside the frame seat, and the two ends of the extension rod may be pivotally connected to the power transmission part and the crank arm. The crank arm and the swing block may be combined with a transmission rod, and the transmission rod may extend through the working space and may be pivotally connected to the side wall of the frame seat and the central positioning strip.

In some embodiments, the two ends of the extension rod can be connected to the power transmission part and the crank rod by bearings, the other end of the crank rod can extend downward from the extension rod and form a spline groove for the transmission rod to be coupled, and the swing block can have a spline groove for the transmission rod to be coupled.

In some embodiments, a pad may be provided at the front inner wall of each of the two working spaces to limit the swing range of the swing block and the second swing block respectively.

In some embodiments, a parking card can be pivoted at the rear end of the chamber and can be pivoted by a pull cord.

In some embodiments, the parking card can have two blocks that are combined with each other and pivoted in the frame, the two flip blocks can be connected by a joint, one of the flip blocks can be combined with a rotating shaft pivoted on the frame, and the other flip block can be combined between the two blocks. The pull wire can drive the rotating shaft and one of the flip blocks to pivot, and can link the other flip block and the two blocks to flip forward from the upright state.

In some embodiments, a long tail of the other flip block can abut against the bottom of the flip block coupled to the shaft to maintain a locked state.

In some embodiments, the two-way adapter may have a core rod, and the two ends of the core rod may be respectively connected to a connecting member, and the two ends of the two-way adapter may respectively generate three-dimensional relative motion relative to the swing block and the connecting rod.

In some embodiments, the connector can be a fisheye bearing, a rod bearing, a universal bearing or a universal joint.

In some embodiments, the frame seat may be in an elongated shape, and the front end of the frame seat may be pivotally connected to the lower rear end of the frame so that the rear end of the frame seat may be raised or lowered relative to the frame.

The vehicle body tilt control system of the present invention has the following characteristics: it can ensure that the two wheels on the left and right sides move in opposite directions, so that during driving, even when turning or driving on uneven roads, the two wheels can maintain contact with the ground and have good grip, and there will be no single wheel hanging in the air, which can effectively reduce the probability of the vehicle overturning due to unstable center of gravity during driving, thereby achieving the effect of improving riding safety and comfort.

The embodiments of the present invention are described in detail with reference to the drawings. The attached drawings are mainly simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, only the components related to the present invention are marked in the drawings, and the components shown are not drawn in the number, shape, size ratio, etc. during implementation. The specifications and dimensions during actual implementation are actually a selective design, and the layout of the components may be more complicated.

The following descriptions of the embodiments refer to the attached drawings to illustrate specific embodiments according to which the present invention can be implemented. The present invention defines the Y direction as the front and rear direction, the X direction as the left and right direction, and the Z direction as the upper (top) and lower (bottom) direction according to the direction of the vehicle. In addition, the directions such as "inside", "outside", "side" and other directions or their approximate terms described in the present invention are mainly with reference to the directions of the attached drawings. The directions or their approximate terms are only used to assist in the description and understanding of the embodiments of the present invention, and are not used to limit the present invention. In addition, in the specification, unless explicitly described to the contrary, the word "comprising" will be understood to mean including the elements described, but not excluding any other elements.

Please refer to Figures 1 and 2, which are a preferred embodiment of the vehicle body tilt control system of the present invention, comprising a frame 1, two linkage components 2 and a connecting rod 3. The two linkage components 2 are respectively located on the left and right sides of the frame 1, and the connecting rod 3 is connected between the two linkage components 2. Among them, this embodiment is described by taking a tricycle as an example, but it is not limited to this.

The frame 1 is connected to a frame F and can be assembled with two rear wheels R; the front end of the frame F is assembled with a front wheel T. In this embodiment, the frame 1 can be in a long and flat shape, and the front end of the frame 1 can be pivoted to the lower rear end of the frame F, so that the rear end of the frame 1 can be raised or lowered relative to the frame F to comply with the raising or lowering action of the two rear wheels R (described in detail later). The frame 1 has a chamber 11 for accommodating the connecting rod 3 and some components of the two linkage assemblies 2; the frame 1 of this embodiment has a central positioning strip 12, which is located in the center of the chamber 11, and the central positioning strip 12 can generally divide the chamber 11 into two opposite working spaces 11a and 11b on the left and right. The front inner walls of the two working spaces 11a and 11b may each be provided with a pad 13. The frame 1 may also be provided with a parking card 14, which is pivoted at the rear end of the chamber 11 and can be pivoted by a pull line L.

The two linkage components 2 are symmetrically arranged on the two sides of the frame 1, and each linkage component 2 has a swing arm 21. The swing arms 21 of the two linkage components 2 can be pivoted to the left and right outer sides of the frame 1 at one end, and the other ends of the two swing arms 21 can be respectively coupled to the two rear wheels R. Please refer to Figures 2 and 3, each linkage component 2 has a swing arm 22, one end of the swing arm 22 is pivoted to a power transmission part 211 of the swing arm 21, and the other end of the swing arm 22 is coupled to a swing block 23, and the swing block 23 is pivoted to one end of a two-way adapter 24. The swing block 23 and the two-way adapter 24 of one of the linkage components 2 are located in one of the working spaces 11 a, and the swing block 23 and the two-way adapter 24 of the other linkage component 2 are located in the other working space 11 b.

In more detail, the swing arm 22 of the present embodiment may have an extension rod 22a and a crank rod 22b, wherein the extension rod 22a is approximately in a straight line shape, and the crank rod 22b is approximately in a U-shape. The two ends of the extension rod 22a may be pivotally connected to the power transmission part 211 and the crank rod 22b by a bearing 221, and the other end of the crank rod 22b may extend downward from the extension rod 22a and may form a spline groove 222 for coupling with a transmission rod 22c, and the swing block 23 has a spline groove 231 for coupling with the transmission rod 22c. The extension rod 22a and the crank rod 22b can both be arranged outside the frame 1, and the transmission rod 22c can extend through the working space 11a (or working space 11b) of the frame 1 and be pivoted to the side wall of the frame 1 and the central positioning strip 12; in this way, the crank rod 22b and the swing block 23 can be synchronously pivoted relative to the frame 1 through the transmission rod 22c, achieving a coaxial transmission motion type. On the other hand, the two-way adapter 24 of the present embodiment may have a core rod 24a, and the two ends of the core rod 24a may be respectively connected to a connecting member 24b. The connecting member 24b may be, for example but not limited to, a fisheye bearing, an end rod bearing, a universal bearing or a universal joint, so that the two ends of the two-way adapter 24 can generate three-dimensional relative motion relative to the swing block 23 and the connecting rod 3 respectively.

Please refer to Figures 3 and 4. The connecting rod 3 is located in the frame 1. The connecting rod 3 is pivoted to the other end of the two-way adapter 24 of the two linkage components 2 by two connecting parts 31. The connecting rod 3 also has a pivot 32, which is located between the two connecting parts 31 and can be pivoted to the central positioning strip 12 of the frame 1, so that the connecting rod 3 pivots around the pivot 32, so that the two connecting parts 31 can swing forward and backward in opposite directions; that is, when one connecting part 31 swings forward, the other connecting part 31 can swing backward, so as to link the two linkage components 2 to synchronously perform opposite movements.

5 and 6, according to the above structure, the tricycle equipped with the vehicle body tilt control system of the present embodiment, when the tricycle is in an upright state, its frame F and two rear wheels R are not tilted relative to the ground. At this time, the corresponding components of the two linkage assemblies 2 are generally horizontally opposite to each other, and the connecting rod 3 does not swing forward or backward.

Please refer to Figures 7 and 8. When the rider controls the tricycle to lean to the left, for example, the rider's force of leaning to the left can cause the left rear wheel R to be subjected to downward pressure, while the ground provides a lifting force to the left rear wheel R. Therefore, the force of the ground acting on the left rear wheel R can cause the left rear wheel R to move upward relative to the frame F, thereby lifting the swing arm 21 of the left linkage assembly 2, and linking its swing arm 22, swing block 23 and two-way adapter 24, thereby causing the left connecting portion 31 of the connecting rod 3 to swing backward and the right connecting portion 31 to swing forward, and accordingly, The power is transmitted to the two-way adapter 24, the swing block 23, the swing arm 22 and the swing arm 21 of the right side linkage assembly 2, so that the right rear wheel R moves downward relative to the frame F. Therefore, when the tricycle is in a sideways state, the frame F and the two rear wheels R are tilted relative to the ground; that is, the two rear wheels R move up and down relative to the frame F without tilting relative to it.

In short, since the vehicle body tilt control system of the present embodiment can control the two linkage components 2 to synchronously perform reverse movements, the lifting amplitude of the left rear wheel R will be the same as the lowering amplitude of the right rear wheel R (and vice versa), thereby ensuring that the two rear wheels R can maintain contact with the ground during driving, ensuring that the two rear wheels R can provide good grip, and there will be no single wheel hanging, which can effectively reduce the probability of the vehicle overturning due to unstable center of gravity during driving.

Similarly, when the tricycle is traveling on an uneven road, when one of the rear wheels R is lifted due to the bump on the ground, the other rear wheel R can also perform a reverse action to generate downward pressure; for example, when the left rear wheel R is lifted by the bump on the ground, the reaction force provided by the ground to the right rear wheel R can be used to form an effect of lifting the right rear wheel R, thereby providing a force to suppress the lifting of the left rear wheel R through the one-side linkage assembly 2, the connecting rod 3 and the other-side linkage assembly 2. Therefore, the two rear wheels R can also maintain contact with the ground during the process of traveling on an uneven road, and can reduce the effect of the tricycle bouncing caused by the uneven road, thereby improving the riding comfort. When one of the rear wheels R drops due to traveling through a concave hole, the situation is opposite to the above, and will not be described in detail here.

It is worth mentioning that, referring to FIGS. 6 and 8 , when the swing blocks 23 of the two linkage components 2 swing in the two working spaces 11a and 11b respectively, the pads 13 in the two working spaces 11a and 11b can limit the swing range and provide a buffering effect.

Please also refer to Figures 5 and 6. When the tricycle is in the upright state, the pull wire L (shown in Figure 2) can be operated to link and pivot the parking clamp 14, so that the parking clamp 14 pivots to the state shown in Figure 9, thereby blocking and limiting the swing range of the connecting rod 3, achieving a locking effect, so that the tricycle can maintain an upright state during the parking period. Please refer to Figures 4 and 9. In this embodiment, the parking card 14 can have two blocks 141 and two flip blocks 142. The two blocks 141 are combined with each other and hinged to the inner wall of the frame 1. The two flip blocks 142 can be connected by a joint J. One of the flip blocks 142 can be combined with a rotating shaft 143 hinged on the frame 1, and the other flip block 142 can be directly or indirectly combined between the two blocks 141. In the unlocked state, the two blocks 141 are upright and keep a predetermined distance from the connecting rod 3 to avoid interference with the swing of the connecting rod 3; when locking, the pull wire L is operated to drive the shaft 143 and one of the flip blocks 142 to pivot, thereby linking the other flip block 142 and the two blocks 141 to flip forward from the upright state to about 1/4 of the vertical position. 90 degrees, so that the two clamping blocks 141 are very close to the connecting rod 3, achieving a locking effect of limiting the swing range of the connecting rod 3, and the long tail of the other flipping block 142 is pressed against the bottom of the flipping block 142 combined with the shaft 143 to maintain the locking state; in addition, a spring can be installed to help the parking clamp 14 to reset when the locking state is released.

As mentioned above, the vehicle body tilt control system of the present invention can ensure that the two wheels on the left and right sides move in opposite directions, so that during driving, even when turning or driving on uneven roads, the two wheels can maintain contact with the ground and have good grip, and there will be no single wheel hanging in the air. This can effectively reduce the probability of the vehicle overturning due to unstable center of gravity during driving, thereby achieving the effect of improving riding safety and comfort. Furthermore, the vehicle body tilt control system of the present invention has almost all the related components of the left and right linkage arranged in a flat and long frame seat to form an integrated component. In one embodiment, the size of the frame seat is only about 30cm*15cm*10cm, so the vehicle body tilt control system is small in size, not only easy to manufacture and assemble, but also occupies a very small assembly space, and is not easy to restrict the configuration of other components of the tricycle, which helps to improve the overall design freedom of the tricycle, and the vehicle body can also have a larger tilt amplitude. In addition, the frame seat can be covered by a box body, so that the related components of the left and right linkage are protected in the box body, so as to seal the components and achieve the effect of dustproof and moistureproof, thereby extending the service life of the vehicle body tilt control system.

The above disclosed embodiments are merely illustrative of the principles, features and effects of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art may modify and alter the above embodiments without violating the spirit and scope of the present invention. Any equivalent changes and modifications made using the contents disclosed in the present invention shall still be covered by the scope of the patent application below.

1: Frame 11: Chamber 11a, 11b: Working space 12: Central positioning strip 13: Pad 14: Car station fixture 141: Clamp 142: Flip block 143: Rotating shaft 2: Linkage assembly 21: Swing arm 211: Power transmission unit 22: Swing arm 221: Bearing 222: Spline slot 22a: Extension rod 22b: Crank rod 22c: Transmission rod 23: Swing block 231: Spline slot 24: Two-way adapter 24a: Core rod 24b: Connector 3: Connecting rod 31: Connecting unit 32: pivot F: frame J: joint L: cable N: long tail R: rear wheel T: front wheel

[Figure 1] is a three-dimensional view of a tricycle assembled with an embodiment of the present invention, wherein the left rear wheel is omitted. [Figure 2] is a partial enlarged view of Figure 1. [Figure 3] is a three-dimensional exploded view of a linkage assembly of an embodiment of the present invention. [Figure 4] is a side sectional view of an embodiment of the present invention. [Figure 5] is a rear view of a tricycle assembled with an embodiment of the present invention in an upright state. [Figure 6] is a top view of the state of Figure 5. [Figure 7] is a rear view of a tricycle assembled with an embodiment of the present invention in a left-leaning state. [Figure 8] is a top view of the state of Figure 7. [Figure 9] is a partial three-dimensional view of a stationary card of an embodiment of the present invention in a locked state.

1: Frame 11: Chamber 11a, 11b: Workspace 12: Central positioning bar 13: Pad 14: Parking card 2: Linkage assembly 21: Swing arm 22: Swing arm 23: Swing block 24: Two-way adapter 3: Connecting rod 31: Connection part 32: Pivot

Claims (10)

A vehicle body tilt control system comprises: a frame seat, one end of which is pivotally connected to the rear end of a frame; two linkage assemblies symmetrically arranged on two sides of the frame seat, each linkage assembly having a swing arm pivotally connected to one side of the frame seat, one end of a swing arm pivotally connected to a power transmission part of the swing arm, the other end of the swing arm pivotally connected to a swing block, and the swing block pivotally connected to one end of a two-way adapter; and a connecting rod located in the frame seat and connected by two connecting parts. The other end of the two-way adapter is pivotally connected to the two linkage components, and a pivot is located between the two connection parts and pivotally connected to the frame seat; wherein the frame seat has a chamber for accommodating the connecting rod, a central positioning strip is located in the chamber and divides the chamber into two opposite working spaces on the left and right, wherein the swing block and the two-way adapter of one linkage component are located in one of the working spaces, and the swing block and the two-way adapter of the other linkage component are located in the other working space. The vehicle body tilt control system as described in claim 1, wherein the swing arm has an extension rod and a crank rod located outside the frame, the two ends of the extension rod are connected to the power transmission part and the crank rod, the crank rod and the swing block are combined with a transmission rod, and the transmission rod extends through the working space and is connected to the side wall of the frame and the central positioning strip. As described in claim 2, the vehicle body tilt control system, wherein the two ends of the extension rod are connected to the power transmission part and the crank rod by bearings, the other end of the crank rod extends downward from the extension rod and forms a spline groove for the transmission rod to be coupled, and the swing block has a spline groove for the transmission rod to be coupled. As described in claim 1, the vehicle body tilt control system, wherein a pad is provided at the front inner wall of each of the two working spaces to limit the swing range of the swing block. As described in claim 1, the vehicle body tilt control system, wherein a vehicle station clamp is pivoted at the rear end of the compartment and pivoted by a pull wire. The vehicle body tilt control system as described in claim 5, wherein the stationary card has two card blocks that are coupled to each other and pivoted in the frame seat, and the two flip blocks are connected by a joint, one of the flip blocks is coupled to a rotating shaft pivoted in the frame seat, and the other flip block is coupled between the two card blocks, and the pull wire drives the rotating shaft and one of the flip blocks to pivot, and links the other flip block and the two card blocks to flip forward from the upright state. A vehicle body tilt control system as described in claim 6, wherein a long tail of the other flip block abuts against the bottom of the flip block coupled to the shaft to maintain a locked state. The vehicle body tilt control system as described in claim 1, wherein the two-way adapter has a core rod, the two ends of the core rod are respectively connected to a connecting member, and the two ends of the two-way adapter respectively generate three-dimensional relative motion relative to the swing block and the connecting rod. A vehicle body tilt control system as described in claim 8, wherein the connecting member is a fisheye bearing, an end rod bearing, a universal bearing or a universal joint. As described in claim 1, the frame seat is elongated and has a front end pivotally connected to the lower rear end of the frame so that the rear end of the frame seat can be raised or lowered relative to the frame.

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