A steering structure of a low-center-of-gravity tricycle and a tricycle using the same

Abstract

The utility model provides a kind of steering structure of low gravity center tricycle and tricycle using it, including frame, it includes two pivot, one pivot is connected with handlebar, another pivot is connected with wheel by fork;Linkage unit, it includes at least one connecting rod, two pivot respectively extend out torsion arm to side, two ends of connecting rod are respectively connected with the torsion arm rotation of two pivot.The utility model connects two pivot with handlebar and wheel respectively and makes handlebar can control wheel rotation by linkage unit, so that under the premise of facilitating driving personnel to hold handlebar, increase the space range where driving personnel is, so that when the position of driving personnel is lowered, avoid steering and other actions in riding process to cause wheel intrusion driving personnel space.

Description

Technical Field

[0001] This utility model belongs to the field of tricycle technology, and in particular relates to a steering structure for a low center of gravity tricycle and a tricycle using the same. Background Technology

[0002] In the daily lives of some residents, tricycles serve as a convenient means of transportation and cargo transport. However, with social development and rising living standards, some models of tricycles have evolved beyond simple cargo transport to include leisure and entertainment, becoming an indispensable part of some families' lives. To ensure comfort and legroom for the driver, the driver's seat on modern tricycles is often positioned high. However, this high position raises the tricycle's center of gravity, making it less stable. Furthermore, the high seat requires the driver to stand on tiptoe or even step onto the frame before getting on, leading to inconvenience, discomfort, and even potential danger. Even after the tricycle is parked, the legs cannot directly contact the ground, requiring the driver to remain on tiptoe, further complicating the ride. Lowering the seat makes it easier for the rider to get on, but the legs need to remain curled up for a long time while riding. During long periods of pedaling, the muscles cannot be effectively stretched, which can easily lead to leg muscle fatigue and fail to meet the comfort requirements of riding. Utility Model Content

[0003] In view of this, the present invention aims to provide a steering structure for a low-center-of-gravity tricycle and a tricycle using the same, so as to lower the center of gravity of the tricycle and make it easier for the driver to get on the vehicle.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A steering structure for a low-center-of-gravity tricycle, including

[0006] The frame includes two axles, one of which is connected to the handlebars and the other is connected to the wheel via the front fork;

[0007] The linkage unit includes at least one connecting rod, two rotating shafts extending laterally to form torsion arms, and the two ends of the connecting rod being rotatably connected to the torsion arms of the two rotating shafts respectively.

[0008] Furthermore, a ball head is fixed at the end of the torsion arm, and a fisheye bearing is provided at the end of the connecting rod. The connecting rod is rotatably connected to the torsion arm through the ball head and the fisheye bearing.

[0009] Furthermore, each rotating shaft has two torsion arms, which are arranged opposite each other, and the torsion arms on the same side of the two rotating shafts are connected by a connecting rod.

[0010] Furthermore, the frame also includes two fixed tubes, with the two pivots respectively placed inside the two fixed tubes.

[0011] Furthermore, a first connecting piece is fixed to the top of the axle connected to the wheel, and the torsion arm of the axle is formed by the outward extension of the first connecting piece.

[0012] Furthermore, a second connecting piece is fixed at the bottom end of the pivot shaft connected to the handlebars, and the torsion arm of the pivot shaft is formed by the outward extension of the second connecting piece.

[0013] Based on the above-mentioned steering structure, this application also provides a low center of gravity tricycle, which includes a seat, a riding space and the above-mentioned steering structure. The riding space is located between the seat and the pivot connected to the handlebars, and the pivot connected to the wheels is located on the side of the steering structure away from the riding space.

[0014] Furthermore, the vehicle frame also includes a crossbeam and a seat mounting bracket. The bottom of the seat mounting bracket is provided with a sliding groove, and the crossbeam is placed in the connecting groove, so that the seat mounting bracket can move along the length of the crossbeam and move closer to or away from the steering structure. The seat is fixed on the seat mounting bracket.

[0015] Furthermore, the crossbeam has multiple fixing holes along its length, and at least one side wall of the sliding groove has an elongated hole along the length of the crossbeam. A fixing slot is formed on one side wall of the elongated hole, and the fixing slot corresponds to the fixing hole. The pin can pass through the fixing slot and the fixing hole, so that the seat mounting bracket can be fixed on the crossbeam.

[0016] Furthermore, the riding space is equipped with foot pedals at the bottom, and the seat can tilt toward or away from the foot pedals.

[0017] Compared with existing technologies, the steering structure of the low-center-of-gravity tricycle described in this utility model has the following advantages:

[0018] This utility model uses two rotating shafts that are connected to the handlebars and wheels respectively, and the handlebars can control the rotation of the wheels through a linkage unit. This increases the space available to the rider while making it easier for the rider to hold the handlebars. It also prevents the wheels from encroaching on the rider's space when the rider's position is lowered, such as when turning during riding.

[0019] Two connecting rods are used to link the two rotating shafts, which makes the force on the two rotating shafts more stable and reliable when they rotate, and avoids the situation where the connecting rod and the connection are more likely to disengage when a single connecting rod is used.

[0020] By lowering the seat height, it is easier for the driver to get on the vehicle. At the same time, by moving the front wheel of the tricycle forward, the pedals have room to move forward, allowing the driver's legs to extend forward while riding. This improves vehicle stability and ensures comfort during the ride. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a schematic diagram of the front frame of a tricycle.

[0023] Figure 2 This is a schematic diagram of the rotating structure;

[0024] Figure 3 This is a schematic diagram of the seat mounting bracket structure.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-Frame; 11-Crossbeam; 111-Fixing hole; 12-Fixing tube; 13-Seat; 14-Seat mounting bracket; 141-Sliding groove; 142-Elongated hole; 143-Fixing slot; 2-Steering structure; 21-First pivot; 22-Second connecting piece; 23-Second pivot; 24-First connecting piece; 25-Linkage unit; 251-Connecting rod; 252-Torsion arm; 253-Spherical bearing; 3-Riding space. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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 of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] This utility model relates to a low-center-of-gravity tricycle, comprising a frame 1 and a seat 13. The frame 1 includes a crossbeam 11 and a steering structure 2 fixed to one end of the crossbeam 11. The steering structure 2 includes two fixed tubes 12 arranged sequentially away from the crossbeam 11. A first rotating shaft 21 is rotatably connected to the fixed tube 12 closer to the crossbeam 11, and a second rotating shaft 23 is rotatably connected to the fixed tube 12 further away from the crossbeam 11. The two rotating shafts can rotate synchronously. Specifically, a linkage unit 25 is provided between the first rotating shaft 21 and the second rotating shaft 23. The linkage unit 25 includes a connecting rod 251, and torsion arms 252 extend laterally from the ends of the first rotating shaft 21 and the second rotating shaft 23, respectively. The two ends of the connecting rod 251 are rotatably connected to the ends of the torsion arms 252. In this embodiment, in daily use, torque transmission can be achieved by connecting the first and second rotating shafts with a single connecting rod, meeting the usage requirements. In this embodiment, to improve the reliability of the connection, reduce the force between the connecting rod and the spherical bearing during the movement of the connecting rod, improve structural safety performance, and make the force on the rotating shaft more balanced, each rotating shaft is provided with two torsion arms 252 at its end, and the two torsion arms 252 are respectively placed on both sides of the rotating shaft. The ends of the two connecting rods 251 are rotatably connected to the torsion arms 252 on the same side of the two rotating shafts, so that the rotatable connection parts at the ends of the two connecting rods 251 form a parallelogram. This ensures that the rotation angle of the first rotating shaft 21 is the same as the rotation angle of the second rotating shaft 23, thus preventing the driver from still being able to control the steering of the vehicle even if the connection between one connecting rod and the spherical bearing becomes loose or even falls off. During use, the top end of the first rotating shaft 21 is fixed to the handlebars (not shown in the figure), and the bottom end of the second rotating shaft 23 is connected to the wheel through the front fork, making it convenient for the driver to control the steering of the wheel through the handlebars. To ensure smoother steering, the two shafts are axially parallel, and a fisheye bearing 253 is provided at the end of the connecting rod 251. A ball joint is provided at the end of the torsion arm 252. The connecting rod 251 is rotatably connected to the torsion arm 252 via the ball joint and the fisheye bearing 253. More specifically, a first connecting piece 24 is fixedly mounted on the top of the second shaft 23, and the torsion arm 252 on the second shaft 23 is formed by extending from both sides of the first connecting piece 24. A second connecting piece 22 is fixedly mounted on the top of the first shaft 21, and the torsion arms 252 on both sides of the first shaft 21 are formed by extending outwards from the second connecting piece 22. The first connecting piece 24 and the second connecting piece 22 can be fixed to the shaft by welding, bolting, snap-fitting, or other methods.

[0032] The seat 13 is connected to the crossbeam 11 via a seat 13 connecting frame, and a space is left between the seat 13 and the steering structure 2 to form a riding space 3. When the rider sits on the seat 13, their body and legs can be placed within the riding space 3. The bottom of the riding space 3 is equipped with pedals, on which the rider's feet can rest and be pedaled to provide power for vehicle movement when needed. In this embodiment, by placing the handlebars and front fork on two axles, the wheels can move forward, thereby placing the pedals directly below the first axle 21. This results in a larger riding space 3, allowing the pedals to be positioned forward, enabling the rider's legs to extend forward. Without compromising riding comfort, the seat 13 can be lowered, making it easier for the rider to get on the vehicle.

[0033] The frame 1 also includes a crossbeam 11 and a seat 13 mounting bracket. The seat 13 mounting bracket has a bottom sliding groove 141, and the crossbeam 11 is placed in the connecting groove, allowing the seat 13 mounting bracket to move along the length of the crossbeam 11 and move closer to or away from the steering structure 2. More specifically, the bottom end of the crossbeam 11 faces the pedal direction. The crossbeam 11 has multiple fixing holes 111 along its own length. At least one side wall of the sliding groove 141 has an elongated hole 142 along the length of the crossbeam 11, and one side wall of the elongated hole 142 has an opening. The tricycle has a fixed slot 143 that corresponds to a fixed hole 111. A pin can pass through the fixed slot 143 and the fixed hole 111, so that the seat 13 mounting bracket can be fixed on the crossbeam 11. This allows the rider to adjust the distance between the seat 13 and the pedals according to their own body posture, so that the tricycle can be used for different riding postures of different drivers. It also allows the driver to adjust the seat height and the space between the seat and the pedals according to their own needs, thereby improving the driver's comfort during the ride.

[0034] With the seat height lowered, riders can sit directly on the seat and rotate their bodies to straddle the bike, or even step over the vehicle to sit directly on the seat. This eliminates the need to stand on tiptoe or step on the crossbar before getting on, simplifying the riding experience. Furthermore, the increased legroom ensures greater comfort during the ride. Despite the altered steering mechanism, maintaining the same handlebar and wheel rotation angles ensures consistent steering control as before, allowing riders to adapt to the new design more quickly and improving ease of operation.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steering structure for a low-center-of-gravity tricycle, characterized in that: include The frame includes two axles, one of which is connected to the handlebars and the other is connected to the wheel via the front fork; The linkage unit includes at least one connecting rod, two rotating shafts extending laterally to form torsion arms, and the two ends of the connecting rod being rotatably connected to the torsion arms of the two rotating shafts respectively.

2. The steering structure of a low-center-of-gravity tricycle according to claim 1, characterized in that: The torsion arm is fixedly provided with a ball head, and the connecting rod is provided with a fisheye bearing. The connecting rod is rotatably connected to the torsion arm through the ball head and the fisheye bearing.

3. The steering structure of a low-center-of-gravity tricycle according to claim 1, characterized in that: Each rotating shaft has two torsion arms, which are arranged opposite each other, and the torsion arms on the same side of the two rotating shafts are connected by a connecting rod.

4. The steering structure of a low-center-of-gravity tricycle according to claim 1, characterized in that: The frame also includes two fixed tubes, with the two pivots respectively placed inside the two fixed tubes.

5. The steering structure of a low-center-of-gravity tricycle according to claim 1, characterized in that: A first connecting piece is fixed at the top of the axle connected to the wheel, and the torsion arm of the axle is formed by extending the first connecting piece outward.

6. The steering structure of a low-center-of-gravity tricycle according to claim 1, characterized in that: A second connecting piece is fixed at the bottom end of the pivot shaft connected to the handlebars, and the torsion arm of the pivot shaft is formed by the outward extension of the second connecting piece.

7. A tricycle with a low center of gravity, characterized in that: The tricycle includes a seat, a riding space, and a steering structure for a low center of gravity tricycle as described in any one of claims 1-6, wherein the riding space is located between the seat and a pivot connected to the handlebars, and the pivot connected to the wheels is located on the side of the steering structure that is away from the riding space.

8. A low-center-of-gravity tricycle according to claim 7, characterized in that: The frame also includes a crossbeam and a seat mounting bracket. The bottom of the seat mounting bracket is provided with a sliding groove, and the crossbeam is placed in the connecting groove, so that the seat mounting bracket can move along the length of the crossbeam and move closer to or away from the steering structure. The seat is fixed on the seat mounting bracket.

9. A low-center-of-gravity tricycle according to claim 8, characterized in that: The crossbeam has multiple fixing holes along its length. At least one side of the sliding groove has an elongated hole along the length of the crossbeam, and a fixing slot is formed on one side of the elongated hole. The fixing slot corresponds to the fixing hole, and the pin can pass through the fixing slot and the fixing hole, so that the seat mounting bracket can be fixed on the crossbeam.

10. A low-center-of-gravity tricycle according to claim 8, characterized in that: The riding space is equipped with footrests at the bottom, and the seat can be tilted toward or away from the footrests.

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