Lift tube structure for a two-wheeled vehicle

Abstract

The utility model discloses a kind of lift pipe structures for two-wheeled vehicle, including outer tube and telescopicly sleeve joint in outer tube inner tube, at least one radial extension's axle pin is provided on the outer tube;At least one continuous guide groove is opened on the pipe wall of the inner tube;The axle pin is inserted into the guide groove, and the movement track of the inner tube relative to the outer tube is limited by the contour of the guide groove, so that the inner tube has lifting stroke along axis and rotation stroke around axis.Guide groove includes intercommunicating straight line segment and spiral segment.The utility model realizes the switching of height adjustment and rotary folding of lift pipe by the cooperation of axle pin and guide groove with straight line segment and spiral segment, improves use safety and saves storage space.

Description

Technical Field

[0001] This utility model belongs to the technical field of two-wheeled vehicle lifting pipe structure, and particularly relates to a lifting pipe structure for two-wheeled vehicles. Background Technology

[0002] Existing two-wheeled vehicle (electric bicycle or bicycle) drop tube structures mostly employ planar anti-rotation or straight guide groove anti-rotation methods, whose function is mainly limited to height adjustment and cannot achieve inner tube rotation. This significantly restricts the optimization of the spatial layout of two-wheeled vehicles, especially electric bicycles and folding bicycles. When users need to reduce the overall width of the vehicle for easier storage or transportation, such traditional structures cannot be implemented. Furthermore, the simple straight-line mating structure poses a safety hazard of the inner tube being accidentally pulled out directly if the locking mechanism fails. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a lifting tube structure for two-wheeled vehicles. Through the cooperation of the axle pin and the guide groove with straight and spiral sections, the lifting tube can switch between height adjustment and rotation folding, thereby improving safety and saving storage space.

[0004] Technical solution: To achieve the above objectives, the present invention provides a lifting pipe structure for a two-wheeled vehicle, comprising an outer pipe and an inner pipe that is retractably sleeved within the outer pipe, wherein at least one radially extending axle pin is provided on the outer pipe. At least one continuous guide groove is provided on the wall of the inner tube; The pin extends into the guide groove and restricts the movement trajectory of the inner tube relative to the outer tube by the contour of the guide groove, so that the inner tube has a lifting stroke along the axis and a rotation stroke around the axis.

[0005] Furthermore, the guide groove includes interconnected straight segments and spiral segments; When the pin is in the straight section, the inner tube can be adjusted in height and stop rotating; when the pin is in the spiral section, the inner tube can rotate relative to the outer tube.

[0006] Furthermore, the straight segment includes an upper straight segment and a lower straight segment, and the upper straight segment, the spiral segment, and the lower straight segment are connected sequentially from top to bottom to form an S-shape in the guide groove.

[0007] Furthermore, the lower end of the guide groove penetrates the bottom end of the inner tube to form an assembly port; the shaft pin can move into or out of the guide groove through the assembly port to realize the insertion and assembly or removal and disassembly of the inner tube relative to the outer tube.

[0008] Furthermore, when the shaft pin is located within the upper straight section and the inner tube needs to be pulled out and disassembled, the inner tube rotates and rises as it passes through the spiral section.

[0009] Furthermore, the rotation angle of the spiral segment is 90 degrees.

[0010] Furthermore, the pivot pin is a locking screw or a locking pivot pin.

[0011] Furthermore, when the shaft pin is a locking shaft pin, a pair of S-shaped guide grooves are symmetrically opened on the inner tube.

[0012] Furthermore, the upper end of the outer tube is provided with a locking device for locking or unlocking the inner tube.

[0013] Furthermore, a connecting member is provided at the top of the inner tube.

[0014] Beneficial effects: This utility model achieves the dual functions of height adjustment and rotational folding of a single component through the cooperation of the shaft pin and the S-shaped guide groove. The path design of the S-shaped guide groove forms an internal mechanical interlock, which requires the inner tube to undergo a rotational action when disassembling or lifting, effectively preventing accidental direct detachment, significantly improving the safety performance of the product, and making the width of the whole vehicle controllable, greatly facilitating storage and transportation, and saving space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 2 . Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1 , Figure 2 as well as Figure 3As shown, a lifting tube structure for a two-wheeled vehicle includes an outer tube 1 and an inner tube 2 that is telescopically fitted inside the outer tube 1. The outer tube 1 has at least one radially extending pin 3. The inner tube 2 has at least one continuous guide groove 4 on its wall. The pin 3 extends into the guide groove 4, and the contour of the guide groove 4 restricts the movement trajectory of the inner tube 2 relative to the outer tube 1, allowing the inner tube 2 to have a lifting stroke along the axis and a rotational stroke around the axis. By utilizing the cooperation between the pin and the guide groove, the freedom of the inner tube 2 is completely restricted to the path defined by the geometric contour of the guide groove 4. This overcomes the limitation of traditional lifting tubes that can only achieve a single lifting function. Through a compact mechanical structure, it integrates two originally independent functions: height adjustment and rotation, laying a structural foundation for optimizing the spatial layout and improving the safety of two-wheeled vehicles.

[0018] The guide groove 4 includes an interconnected straight section 41 and a spiral section 42. When the pin 3 is located in the straight section 41, the inner tube 2 can be adjusted in height and stop rotation. When the pin 3 is located in the spiral section 42, the inner tube 2 can rotate relative to the outer tube 1. The groove wall of the straight section 41 forms a surface contact with the pin 3, constraining the circumferential rotational freedom of the inner tube 2, allowing it to slide only along the axis, thereby achieving lifting adjustment and reliable anti-rotation function. The spiral section 42 is essentially an inclined spiral surface. When the pin 3 moves within this section, the spiral groove wall applies a normal force to the pin 3. This force can be decomposed into an axial component and a circumferential component. The circumferential component constitutes the torque that drives the inner tube 2 to rotate, thereby converting the axial lifting or lowering pressure into precise rotational motion. This allows for clear and reliable switching between the two functional modes of height adjustment and rotation.

[0019] The straight section 41 includes an upper straight section 41a and a lower straight section 41b. The upper straight section 41a, the spiral section 42, and the lower straight section 41b are connected sequentially from top to bottom to form an S-shape in the guide groove 4. The upper straight section 41a is the main working section, used for regular height adjustment; the spiral section 42 is the function conversion section, enabling rotation; and the lower straight section 41b serves as the positioning and stabilization section. After the inner tube 2 rotates into position, the shaft pin 3 is allowed to slide into it, utilizing the anti-rotation characteristics of its straight groove wall to make the rotated state more stable. The entire lifting and rotating action is smooth and natural, improving the stability of the final state.

[0020] The lower end of the guide groove 4 penetrates the bottom end of the inner tube 2, forming an assembly port 40. The shaft pin 3 can move into or out of the guide groove 4 through the assembly port 40, realizing the insertion and assembly or removal and disassembly of the inner tube 2 relative to the outer tube 1. The assembly port 40 serves as a through-hole that allows the shaft pin 3 to enter or leave the guide groove 4 radially. During assembly, simply align the assembly port 40 of the inner tube 2 with the shaft pin 3 on the outer tube 1, push it in, and rotate it to allow the shaft pin 3 to enter the guide groove 4 track. This simplifies the assembly and disassembly process of the lifting tube structure, eliminating the need for complex tools or disassembling the outer tube 1, and facilitating production, transportation, and subsequent maintenance.

[0021] When the shaft pin 3 is located within the upper straight section 41a and the inner tube 2 needs to be pulled out, the inner tube 2 rotates and rises as it passes through the spiral section 42. If the user wants to lift the inner tube 2 to pull it out, the only path is through the spiral section 42. This spiral section 42 forces the user to perform a rotational action simultaneously with the lifting motion, i.e., a rotational upward movement. In simpler terms, the inner tube 2 cannot be pulled out directly; it must be rotated out along the guide groove 4. This actively prevents the inner tube 2 from being pulled out directly and quickly vertically in the event of an accidental failure of the locking device 5, forming an inherent safety protection mechanism that requires no additional triggering, significantly improving the product's safety.

[0022] The top of the inner tube 2 is provided with a connecting member 6 for mounting handlebars or other components.

[0023] In a preferred embodiment, the rotation angle of the spiral segment 42 in this invention is 90 degrees. This ensures that when the axle pin 3 moves from the starting point to the ending point of this segment, the exact angle through which the inner tube 2 rotates is 90 degrees. This allows components such as the handlebars mounted on the top of the inner tube 2 to precisely rotate from a driving position parallel to the vehicle body to a folded position perpendicular to the vehicle body, or vice versa. This angle minimizes the lateral width of the entire vehicle, making it more compact during storage or packaging and improving space utilization efficiency.

[0024] The pin 3 is a locking screw or a locking pin. By using components that are inserted from both sides of the outer tube 1 and locked together, a balanced and stable support structure is formed, which enhances the rigidity and bending resistance of the pin 3 itself, enabling it to more effectively withstand the impact load from the inner tube 2, avoiding loosening, wear or shaking that may occur with a single-sided threaded connection, and improving the durability and reliability of the entire lifting pipe structure.

[0025] In this utility model, as a preferred embodiment, when the shaft pin 3 is a locking shaft pin, a pair of S-shaped guide grooves 4 are symmetrically provided on the inner tube 2.

[0026] The upper end of the outer tube 1 is provided with a locking device 5 for locking or unlocking the inner tube 2, and the locking device 5 is preferably a quick-release clamping ring.

[0027] In summary, this utility model achieves the dual functions of height adjustment and rotational folding of a single component through the cooperation of the shaft pin and the S-shaped guide groove. Firstly, the path design of the S-shaped guide groove forms an internal mechanical interlock, which requires the inner tube to undergo a rotational action when disassembling or lifting, effectively preventing accidental direct detachment and significantly improving the safety performance of the product. Secondly, it makes the width of the entire vehicle controllable, greatly facilitating storage and transportation and saving space.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A lifting pipe structure for a two-wheeled vehicle, comprising an outer pipe (1) and an inner pipe (2) retractably sleeved within the outer pipe (1), characterized in that: At least one radially extending shaft pin (3) is provided on the outer tube (1); At least one continuous guide groove (4) is provided on the wall of the inner tube (2). The pin (3) extends into the guide groove (4) and restricts the movement trajectory of the inner tube (2) relative to the outer tube (1) by the contour of the guide groove (4), so that the inner tube (2) has a lifting stroke along the axis and a rotation stroke around the axis.

2. The lifting pipe structure for a two-wheeled vehicle according to claim 1, characterized in that: The guide groove (4) includes a straight section (41) and a spiral section (42) that are interconnected. When the pin (3) is in the straight section (41), the inner tube (2) can be adjusted in height and stop rotating; when the pin (3) is in the spiral section (42), the inner tube (2) can rotate relative to the outer tube (1).

3. The lifting pipe structure for a two-wheeled vehicle according to claim 2, characterized in that: The straight segment (41) includes an upper straight segment (41a) and a lower straight segment (41b). The upper straight segment (41a), the spiral segment (42), and the lower straight segment (41b) are connected from top to bottom to form an S-shape in the guide groove (4).

4. The lifting pipe structure for a two-wheeled vehicle according to claim 3, characterized in that: The lower end of the guide groove (4) passes through the bottom end of the inner tube (2) to form an assembly port (40); the shaft pin (3) can move into or out of the guide groove (4) through the assembly port (40) to realize the insertion and assembly or removal and disassembly of the inner tube (2) relative to the outer tube (1).

5. A lifting pipe structure for a two-wheeled vehicle according to claim 3 or 4, characterized in that: When the shaft pin (3) is located in the upper straight section (41a) and the inner tube (2) needs to be pulled out and disassembled, the inner tube (2) rotates and rises when passing through the spiral section (42).

6. A lifting pipe structure for a two-wheeled vehicle according to claim 3 or 4, characterized in that: The rotation angle of the spiral segment (42) is 90 degrees.

7. The lifting pipe structure for a two-wheeled vehicle according to claim 1, characterized in that: The pin (3) is a locking screw or a locking pin.

8. A lifting pipe structure for a two-wheeled vehicle according to claim 3 or 7, characterized in that: When the shaft pin (3) is a locking shaft pin, a pair of S-shaped guide grooves (4) are symmetrically opened on the inner tube (2).

9. The lifting pipe structure for a two-wheeled vehicle according to claim 1, characterized in that: The upper end of the outer tube (1) is provided with a locking device (5) for locking or unlocking the inner tube (2).

10. The lifting pipe structure for a two-wheeled vehicle according to claim 1, characterized in that: The inner tube (2) is provided with a connecting member (6) at its top.

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