Steering column mechanism of reverse motor tricycle

Abstract

The utility model discloses an inverted motor tricycle steering column mechanism which comprises a steering column and a frame, and the steering column is provided with a radial protrusion used for limiting axial displacement of the steering column in the frame. The radial bulge is positioned on the outer side of the frame, and an elastic mechanism is arranged between the radial bulge and the The frame is provided with a headstock sleeve sleeved outside the steering column; the radial protrusion is located below the bottom of the headstock sleeve, and the outer diameter of the radial protrusion is not smaller than that of the headstock sleeve. The device can prevent the steering column and the frame from being stuck and is simple in structure.

Description

Technical Field

[0001] The utility model relates to a reverse three-wheel motorcycle, in particular to a steering column mechanism of a reverse three-wheel motorcycle. Background Art

[0002] A trend is emerging in the market for inverted three-wheeled motorcycles. These have two front wheels and one rear wheel, driven by a steering mechanism. The two front wheels provide steering, while the rear wheel provides driving. This design offers greater stability and safety than two-wheeled vehicles in complex terrain, particularly when cornering. Furthermore, compared to four-wheeled motorcycles, these motorcycles are significantly simpler and less expensive, making them popular with the public.

[0003] The steering mechanism in a reverse three-wheeled motorcycle includes a steering column, which is rotatably connected to the frame. Normally, an axial limiting mechanism is provided between the steering column and the frame to limit the axial displacement of the steering column relative to the frame. During actual driving, the axial limiting mechanism may become stuck in the frame due to different vibration amplitudes of the steering column and the frame or temperature differences between the two, making the vehicle unable to steer and prone to safety accidents.

[0004] A Chinese invention patent application with publication number CN117775156A discloses a front-wheel steering mechanism for a three-wheeled vehicle. When adjusting the front wheel steering of the three-wheeled vehicle, the steering column is rotated. The steering column drives a swing arm to swing around a rotation point through a connecting assembly. The end of the swing arm away from the mounting frame drives a connecting joint to swing. When the connecting joint swings, it pulls a first connecting arm, which pulls a second connecting arm, which pulls a steering head, which pulls a steering shaft, which pulls a connecting member, thereby driving the front wheel of the three-wheeled vehicle to deflect. Because the swing arm and the connecting joint, the connecting joint and the first connecting arm, the second connecting arm and the steering head, and the steering shaft and the connecting member are all rotationally connected, the maximum rotation angle of each joint of the steering mechanism can be greater than 36 degrees, thereby enhancing the flexibility of the steering mechanism and enabling the three-wheeled vehicle to adapt to large-angle deflections of the front wheel.

[0005] The above mechanism can adapt to the up and down shaking of the front wheel through the mutual cooperation of the swing arm 3, the connecting joint 5, the first connecting arm 6, the second connecting arm 7 and the steering knuckle 8, thereby preventing the steering mechanism from getting stuck. However, this structure is too complicated and can only prevent the jamming caused by the up and down shaking, but cannot prevent the jamming caused by the different temperatures of the steering column and the frame. Summary of the Invention

[0006] Purpose of the utility model: The purpose of the utility model is to provide a steering column mechanism for a reverse three-wheeled motorcycle which can prevent the steering column and the frame from getting stuck and has a simple structure.

[0007] Technical solution: The steering column mechanism of a reverse three-wheeled motorcycle described in the utility model includes a steering column and a frame. The steering column is provided with a radial protrusion for limiting its axial displacement in the frame, and an elastic mechanism is provided between the radial protrusion and the frame.

[0008] Based on the above technical solution, an elastic mechanism is provided between the radial protrusion of the steering column and the frame so that there is a certain axial buffer space between the radial protrusion and the frame, so that the radial protrusion can not only limit the axial displacement of the steering column relative to the frame, but also provide a certain axial displacement space relative to the frame, thereby avoiding jamming due to vehicle shaking; at the same time, the radial protrusion is arranged on the outside of the frame as an axial limiting mechanism of the steering column, and the two will not contact each other in the radial direction, and an elastic mechanism is provided between the radial protrusion and the frame, that is, there is no direct contact between the two in the axial direction, so that even if the radial protrusion and the frame expand to different volumes due to temperature difference, the two will not contact each other and get stuck, so this mechanism can simultaneously prevent the steering mechanism from being stuck due to shaking and temperature difference, and has a simple structure.

[0009] Preferably, the vehicle frame is provided with a head cover which is sleeved outside the steering column.

[0010] Preferably, the radial protrusion is located below the bottom of the head cover, and the outer diameter of the radial protrusion is not less than the outer diameter of the head cover.

[0011] The radial protrusion is arranged below the bottom of the head cover, which also enables the radial protrusion to be separated from the head cover in the axial and radial directions. The outer diameter of the radial protrusion is not less than the outer diameter of the head cover, which can achieve axial limitation of the steering column. When the radial protrusion contacts the head cover, the steering column cannot continue to move upward, and the top end of the steering column is connected to the faucet, and its downward axial displacement is limited by the faucet.

[0012] Preferably, the elastic mechanism is provided between the radial protrusion and the bottom of the hood.

[0013] The elastic mechanism is connected between the radial protrusion and the bottom of the head cover, rather than being connected to the inner or outer side wall of the head cover, which can avoid wear caused by friction between the elastic mechanism and the side wall of the head cover and jamming due to temperature difference.

[0014] Preferably, a raised ring is provided at the bottom of the head cover, and the inner diameter of the raised ring is larger than the outer diameter of the radial protrusion and the elastic mechanism.

[0015] The provision of a raised ring can achieve radial limitation of the top of the elastic mechanism, preventing it from breaking at the connection with the head cover during the compression process. The top of the elastic mechanism slides to the outside of the head cover, causing the two to undergo axial displacement, thereby losing the original function of the elastic mechanism. The inner diameter of the raised ring is larger than the outer diameter of the radial protrusion and the elastic mechanism, which can avoid radial contact with the two and cause jamming.

[0016] Preferably, the radial protrusions are two tightening nuts connected to the steering column.

[0017] The radial protrusion adopts two tightening nuts, and its position can be adjusted according to actual needs, thereby adjusting the amplitude of the axial displacement of the steering column, which is more flexible to use.

[0018] Preferably, a thrust bearing is provided between the head cover and the elastic mechanism.

[0019] A thrust bearing is provided so that when the steering column shakes up and down, the elastic mechanism can also rotate normally and is not prone to getting stuck.

[0020] Preferably, a deep groove ball bearing is provided between the steering column and the frame.

[0021] A deep groove ball bearing is provided between the steering column and the frame to avoid wear between the two and radial contact between the two, thereby preventing jamming.

[0022] Beneficial effects: Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging a radial protrusion on the steering column as an axial limiting mechanism, and the radial protrusion is located on the outside of the frame and is connected to the frame with an elastic mechanism, so that the steering column has a certain axial displacement space to avoid getting stuck due to shaking; and the separation of the radial protrusion from the frame also avoids the start caused by temperature difference. The overall structure of this mechanism is simple and easy to manufacture and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of the mechanism

[0024] Figure 2 This is a structural diagram of the mechanism connected to the local frame. DETAILED DESCRIPTION

[0025] As shown in the figure, the steering column mechanism of a reverse three-wheeled motorcycle described in the present invention includes a steering column 1 and a frame 2. The steering column 1 is provided with a radial protrusion 3 for limiting its axial displacement in the frame 2; the radial protrusion 3 is located on the outside of the frame 2, and an elastic mechanism 4 is provided between the radial protrusion 3 and the frame 2.

[0026] The steering column 1 passes through the frame 2 and is rotatably connected thereto. Specifically, the frame 2 is provided with a head cover 2-1 that matches the steering column 1 and is sleeved on the steering column 1. A deep groove ball bearing 6 that matches the steering column 1 can also be provided on the top of the head cover 2-1 or other positions; the head cover 2-1 extends from the top of the steering column 1 to be connected to the motorcycle handlebar, and the head cover 2-1 extends from the bottom to be connected to the front wheel suspension. The front wheel suspension can adopt the same structure as that in the CN117775156A patent application, or other structures.

[0027] The steering column 1 is provided with a radial protrusion 3 below the bottom of the head cover 2-1. The radial protrusion 3 can be an integrally formed annular protrusion or two tightening nuts used in this embodiment. The steering column 1 is provided with an external thread matching the tightening nuts; no matter what structure the radial protrusion 3 adopts, its outer diameter is set to be no less than the outer diameter of the head cover 2-1.

[0028] The elastic mechanism 4 can be a spring or a rubber ring or other elastic component, as long as there is a certain axial displacement space between the steering column 1 and the head cover 2-1; the elastic mechanism 4 is mounted on the steering column 1, and its upper and lower ends are respectively connected to the bottom of the head cover 2-1 and the radial protrusion.

[0029] A raised ring 2-2 can also be provided at the bottom of the head cover 2-1, and the inner diameter of the raised ring 2-2 is larger than the outer diameter of the radial protrusion 3 and the elastic mechanism 4, so that the raised ring 2-2 can clamp the top of the elastic mechanism 4 from the radial direction, realize its radial limitation, and ensure the stability of the connection of the elastic mechanism 4; a thrust bearing 5 is provided between the bottom of the head cover 2-1 and the top of the elastic mechanism 4, and the thrust bearing 5 can be provided in the raised ring 2-2, located at the connection between the raised ring 2-2 and the head cover 2-1.

Claims

1. A steering column mechanism for a three-wheeled motorcycle, comprising a steering column (1) and a frame (2), characterized in that: The steering column (1) is provided with a radial protrusion (3) for limiting its axial displacement in the vehicle frame (2); the radial protrusion (3) is located outside the vehicle frame (2), and an elastic mechanism (4) is provided between the radial protrusion (3) and the vehicle frame (2).

2. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 1, characterized in that: The vehicle frame (2) is provided with a head cover (2-1) sleeved outside the steering column (1).

3. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 2, characterized in that: The radial protrusion (3) is located below the bottom of the head cover (2-1), and the outer diameter of the radial protrusion (3) is not less than the outer diameter of the head cover (2-1).

4. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 3, characterized in that: The elastic mechanism (4) is arranged between the radial protrusion (3) and the bottom of the hood (2-1).

5. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 4, characterized in that: A raised ring (2-2) is provided at the bottom of the head cover (2-1), and the inner diameter of the raised ring (2-2) is larger than the outer diameters of the radial protrusion (3) and the elastic mechanism (4).

6. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 2, characterized in that: A thrust bearing (5) is provided between the head cover (2-1) and the elastic mechanism (4).

7. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 2, characterized in that: A deep groove ball bearing (6) is provided between the steering column (1) and the vehicle frame (2).

8. The steering column mechanism of a reverse three-wheeled motorcycle according to claim 1, characterized in that: The radial protrusions (3) are two tightening nuts connected to the steering column (1).

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