A scooter with quick-release handlebar stem

Abstract

This utility model belongs to the field of scooter technology, and particularly relates to a scooter with a quick-release handlebar stem. A scooter with a quick-release handlebar stem includes: a frame stem located in front of the footrest and connected to the front wheel, with a radially elastic limiting protrusion on its side wall; a handlebar stem; a fastening sleeve located at the lower end of the handlebar stem and sleeved on the outside of the frame stem; the fastening sleeve has a first through-hole on its side wall, with at least one pair of clamping parts on the outside of the first slot, the clamping parts being threadedly connected to fasteners; an eccentric handlebar rotatably connected to the end of the fasteners, its rotation driving the clamping parts to clamp or release; a first limiting hole located on the inner wall of the fastening sleeve for the limiting protrusion to be inserted for axial limiting; and an unlocking button located on the outer wall of the fastening sleeve corresponding to the first limiting hole, which, when pressed, radially pushes the limiting protrusion out of the first limiting hole. This utility model has the advantages of simpler assembly and disassembly and higher safety.

Description

Technical Field

[0001] This utility model belongs to the field of scooter technology, and in particular relates to a scooter with a quick-release handlebar stem. Background Technology

[0002] To facilitate transportation and packaging, existing scooters typically feature a detachable or foldable handlebar stem (commonly known as the "steer arm"). In detachable designs, a common practice is to use a C-shaped opening fitted onto the connection between the handlebar stem and the frame stem (such as the vertical bar in front of the pedals), and then tightening it by screwing on a bolt (such as a screw) at the opening. Tightening this bolt narrows the C-shaped opening, thereby reducing the inner diameter of the clamp and securing the handlebar stem to the frame stem. For example, the solution disclosed in Chinese Patent Publication No. CN202422134954.3 (A Scooter Handlebar Structure and Scooter) uses a similar clamp and a third fastener (screw) to connect the handlebar stem (frame stem) to the frame stem.

[0003] However, this assembly and disassembly method based on fastening sleeves and bolts has the following obvious drawbacks:

[0004] 1. Cumbersome operation: During installation, the insertion positions of the handlebar stem and frame stem must be precisely aligned, and the bolts must be tightened one by one after alignment; during disassembly, all bolts must be loosened one by one. This process involves many steps, is time-consuming, and results in a poor user experience.

[0005] 2. Reliability Risk: The connection between the handlebar stem and the frame stem relies entirely on the clamping friction applied by the bolts through the fastening sleeve. During long-term use of the scooter, the bolts are prone to loosening due to bumps and vibrations. Once the bolts loosen, the clamping force of the fastening sleeve weakens or even disappears, leading to a risk of relative loosening or even accidental detachment between the handlebar stem and the frame stem, affecting riding safety. Utility Model Content

[0006] To address the shortcomings of existing technologies, a scooter is provided that is easier to assemble and disassemble and reduces the risk of accidental detachment due to relative loosening between the handlebar stem and the frame stem.

[0007] This utility model is achieved using the following technical solution: a scooter with a quick-release handlebar stem, comprising:

[0008] The frame riser is located in front of the foot pedal and connected to the front wheel, and its side wall is provided with a radially elastic telescopic limiting protrusion.

[0009] The handlebar stem has a stem at its top;

[0010] A fastening sleeve is provided at the lower end of the handlebar stem and is sleeved on the outside of the frame stem; the side wall of the fastening sleeve is provided with an axially penetrating first slit, and at least one pair of clamping parts are provided on the outside of the first slit, with the clamping parts threadedly connected to fasteners.

[0011] An eccentric handle is rotatably connected to the end of the fastener, and its rotation drives the clamping part to clamp or loosen.

[0012] The first limiting hole is provided on the inner wall of the fastening sleeve for the limiting protrusion to be inserted for axial limiting;

[0013] The unlock button is located on the outer wall of the fastening sleeve corresponding to the first limiting hole. When pressed, it radially pushes the limiting protrusion out of the first limiting hole.

[0014] During use, rotating the eccentric handle loosens the clamping part, allowing the fastening sleeve to be fitted onto the outside of the frame seat tube. This allows the limiting protrusion on the frame seat tube to extend into the first limiting hole, thus completing the axial limiting of the fastening sleeve and the frame seat tube, and connecting the handlebar seat tube and the frame seat tube. Rotating the eccentric handle again tightens the clamping part, reducing the inner diameter of the fastening sleeve to clamp the frame seat tube, thus securing the frame seat tube and handlebar seat tube. To disassemble, rotating the eccentric handle loosens the clamping part, and pressing the unlock button disengages the limiting protrusion from the first limiting hole. The fastening sleeve can then be pulled off the frame seat tube, unlocking the frame seat tube and handlebar seat tube.

[0015] The handlebar stem and the fastening sleeve can be integrally molded or welded from plastic. Therefore, when the fastening sleeve is fixed to the frame stem, the handlebar stem is also fixed to the frame stem.

[0016] When the helm turns, it needs to control the wheels to turn. In the above solution, the first limiting hole and the limiting protrusion can also lock the fastening sleeve and the frame upright in the circumferential direction.

[0017] This solution achieves axial limiting through the engagement of a limiting protrusion and a first limiting hole. Even after prolonged use, when the fasteners of the scooter may loosen, the engagement of the limiting protrusion and the first limiting hole in this solution will provide axial limiting, reducing the risk of accidental detachment of the frame stem and handlebar stem. Furthermore, this solution does not require traditional screw-on fasteners; clamping or loosening can be achieved directly by rotating the eccentric handle, which is quite convenient. To unlock, simply release the eccentric handle.

[0018] Preferably, the fastening sleeve and the handlebar stem are separate, the handlebar stem is provided with a downwardly extending connecting tube, the connecting tube is used to be inserted into the fastening sleeve and sleeved on the outside of the frame stem, and the side wall of the connecting tube is provided with a radially penetrating second limiting hole.

[0019] When the fastening sleeve, connecting tube and frame stem are in the assembled state, the limiting protrusion on the frame stem can pass through the second limiting hole and the first limiting hole at the same time to achieve axial limiting of the fastening sleeve, handlebar stem and frame stem.

[0020] When the unlock button is pressed, the limiting protrusion can be radially pushed out of the first limiting hole and the second limiting hole.

[0021] The separate design of the fastening sleeve and the handlebar stem facilitates the processing and molding of the fastening sleeve. The limiting protrusion can pass through the first limiting hole and the second limiting hole simultaneously to complete the axial limiting of the fastening sleeve, the handlebar stem, and the frame stem.

[0022] Preferably, a circumferential limiting component is provided between the fastening sleeve, the connecting pipe and the frame upright, the circumferential limiting component including a radially extending limiting pin; when the three are assembled in place, the limiting pin passes through the fastening sleeve, the connecting pipe and the frame upright to achieve circumferential limiting of the three.

[0023] The circumferential limiting pins can further enable the linkage of the fastening sleeve, connecting tube and frame stem. When the handlebar stem with the handlebar head is rotated, the fastening sleeve and frame stem can be rotated simultaneously.

[0024] Preferably, the inner wall of the end of the fastening sleeve facing the connecting pipe is provided with a limiting groove, which extends axially through the end face of the fastening sleeve.

[0025] The connecting pipe has a pin hole radially opened on its side wall;

[0026] The end face of the frame riser tube facing the fastening sleeve is provided with an upward-opening U-shaped groove;

[0027] When the three components are assembled, the limiting pin passes through both the pin hole and the U-shaped groove, and its end is embedded in the limiting groove to form a circumferential engagement.

[0028] During the insertion and assembly, first insert the limiting pin into the pin hole of the connecting tube, and then insert the connecting tube into the fastening sleeve. During insertion, adjust the circumferential position of the limiting groove so that the end of the limiting pin can be engaged in the limiting groove, thereby limiting the circumferential position of the fastening sleeve and the connecting tube. Then, insert the frame riser tube into the fastening sleeve so that the frame riser tube is inserted into the connecting tube, and the limiting pin will be engaged in the U-shaped groove of the frame riser tube, thus completing the circumferential limiting of the frame riser tube, handlebar riser tube and fastening sleeve.

[0029] Preferably, when the limiting pin is inserted into the pin hole and its end is embedded in the limiting groove, the first limiting hole and the second limiting hole are forcibly aligned and remain coaxial.

[0030] This method not only achieves circumferential positioning of the connecting tube and the handlebar stem, but also circumferentially aligns the first and second limiting holes, thus facilitating subsequent assembly.

[0031] Preferably, when the limiting pin is inserted into the U-shaped groove, the limiting protrusion is aligned with the first limiting hole and the second limiting hole and remains coaxial.

[0032] This method achieves circumferential positioning of the connecting tube, handlebar stem, and frame stem, while also aligning the limiting protrusion with the first and second limiting holes, facilitating the insertion of the limiting protrusion into the first and second limiting holes, thus making installation easier for the user.

[0033] Preferably, a circumferential positioning structure is provided between the bottom of the connecting pipe and the inner wall of the fastening sleeve. The circumferential positioning structure includes several positioning grooves provided on the connecting pipe. The positioning grooves extend axially and penetrate the bottom of the connecting pipe. A positioning block is provided on the inner wall of the fastening sleeve. When the connecting pipe and the fastening sleeve are inserted, the positioning block and the positioning groove are engaged.

[0034] The circumferential positioning structure further improves the positioning between the connecting pipe and the fastening sleeve, and the above-mentioned setting also has the functions of circumferential limiting and axial limiting.

[0035] Preferably, the connecting pipe is provided with a second gap corresponding to the first gap, and when the connecting pipe is assembled with the fastening sleeve, the second gap is aligned with the first gap.

[0036] The connecting tube has a second gap, which allows the inner diameter of the connecting tube to shrink when the clamping part is clamped, so that the connecting tube can clamp the frame riser tube.

[0037] Preferably, the frame riser is provided with a leaf spring, and the limiting protrusion is connected to the force-applying end of the leaf spring. Under the action of the leaf spring, the limiting protrusion tends to extend outward.

[0038] Preferably, the eccentric handle is provided with a clearance hole to avoid the unlock button.

[0039] The clearance hole can avoid the unlock button, preventing the eccentric handle from hitting the unlock button when rotating, which would cause the limit protrusion to exit the first limit hole and the second limit hole.

[0040] Compared with existing technologies, the advantages of this invention are as follows: This solution achieves axial limiting through the cooperation of the limiting protrusion and the first limiting hole. Even if the fasteners of the scooter loosen after prolonged use, the cooperation of the limiting protrusion and the first limiting hole in this solution will provide axial limiting, reducing the risk of accidental detachment of the frame stem and handlebar stem. Furthermore, this solution does not require traditional screw-on fasteners; clamping or loosening can be achieved directly by rotating the eccentric handle, which is more convenient. To unlock, simply release the eccentric handle. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the scooter;

[0042] Figure 2 for Figure 1 Exploded view;

[0043] Figure 3 This is a schematic diagram of the handlebar stem.

[0044] Figure 4 This is a schematic diagram of the fastening sleeve structure;

[0045] Figure 5 This is a schematic diagram of the connection between the handlebar stem and the fastening sleeve.

[0046] Figure 6 for Figure 5 Enlarged view of the location;

[0047] Figure 7 This is an enlarged view of the frame riser tube.

[0048] Figure 8 This is a sectional view of the frame riser tube;

[0049] Figure 9 This is a cross-sectional view of the connection between the handlebar stem and the fastening sleeve.

[0050] Figure 10 This is a cross-sectional view of the handlebar stem, fastening sleeve, and frame stem connection button being pressed.

[0051] Figure 11 This is a cross-sectional view of the handlebar stem, fastening sleeve, and frame stem connection button when they are not pressed.

[0052] Reference numerals: 1. Handlebar stem section; 11. Handlebar stem; 111. Connecting tube; 112. Limiting pin; 113. Second gap; 114. Positioning groove; 115. Second limiting hole;

[0053] 2. Fastening sleeve part; 21. Fastening sleeve tube; 211. Limiting groove; 212. Positioning block; 22. Clamping part; 23. First gap; 24. Bolt head; 25. Fastener; 26. Eccentric handle; 27. First limiting hole; 28. Clearance hole;

[0054] 3. Frame seat tube; 31. Frame seat tube; 311. U-shaped groove; 312. Limiting protrusion; 313. Leaf spring; 32. Pedals; 33. Wheel;

[0055] 4. Unlock button; 41. Button protrusion. Detailed Implementation

[0056] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0057] like Figure 1 and Figure 2 As shown, this embodiment discloses a scooter with a quick-release handlebar stem. From top to bottom, the scooter's control lever includes a handlebar stem portion 1, a fastening sleeve portion 2, and a frame stem portion 3. A foot pedal 32 is connected to the rear side of the frame stem portion 3, and a front wheel 33 is rotatably connected to its lower side. The handlebar stem portion 1 includes a handlebar handle at its upper end, a handlebar stem 11 in the middle, and a connecting pipe 111 at its lower end. The connecting pipe 111 extends downwards and beyond the lower end of the handlebar stem 11.

[0058] The connecting tube 111 is fixedly connected to the handlebar stem 11. The connecting tube 111 has a pin hole through which a limiting pin 112 passes. The pin hole radially penetrates the side wall of the connecting tube 111, and the end of the limiting pin 112 extends outward from the side wall of the connecting tube 111. The limiting pin 112 can move radially within the pin hole; that is, the limiting pin 112 is not welded to the connecting tube 111. During assembly, the user needs to insert the limiting pin 112 into the pin hole. However, during manufacturing, for ease of installation, the limiting pin 112 can also be welded to the connecting tube 111. The side wall of the connecting tube 111 also has two opposing second limiting holes 115, an axially extending second slot 113, and two opposing positioning grooves 114. The second limiting holes 115 penetrate the side wall of the connecting tube 111. The second gap 113 penetrates the bottom of the connecting pipe 111, causing the connecting pipe 111 to undergo inward deformation when clamped by the fastening sleeve 21.

[0059] like Figures 4 to 6 ,as well as Figure 9As shown, the fastening sleeve part 2 includes a fastening sleeve 21, which is hollow and used for the insertion of the connecting pipe 111. The side wall of the fastening sleeve 21 has an axially penetrating first slot 23. Two pairs of clamping parts 22 are provided at the outer edge of the first slot 23. The clamping parts 22 are threadedly connected to fasteners 25, which are bolts. One end of the fastener has a bolt head 24. After prolonged use, the fasteners 25 may loosen, and the user can adjust the tightness by tightening the bolt head 24. The other end of the fastener 25 is rotatably connected to an eccentric handle 26, which rotates to drive the clamping parts 22 to clamp or loosen.

[0060] A limiting groove 211 is provided on the inner wall of the end of the fastening sleeve 21 facing the connecting pipe 111. The limiting groove 211 extends axially through the end face of the fastening sleeve 21. The limiting groove 211 is for the limiting pin 112 to be engaged. A positioning block 212 is provided on the inner wall of the lower end of the fastening sleeve 21 corresponding to the positioning groove 114. When the connecting pipe 111 is inserted into the fastening sleeve 21, the positioning block 212 and the positioning groove 114 are engaged.

[0061] The inner wall of the fastening sleeve inner wall 21 is also provided with two first limiting holes 27, which are arranged opposite to each other. When the limiting pin 112 is inserted into the pin hole and its end is embedded in the limiting groove 211, the first limiting hole 27 and the second limiting hole 115 are forcibly aligned and kept coaxial, and the second gap 113 is aligned with the first gap 23.

[0062] An unlocking button 4 is provided on the outer wall of the fastening sleeve 21 corresponding to the first limiting hole 27. The unlocking button 4 can move radially, and its end has a button protrusion 41. When the unlocking button 4 is pressed, the button protrusion 41 can extend into the first limiting hole 27 and the second limiting hole 115. A snap-fit ​​structure is provided around the unlocking button 4 to prevent it from detaching from the fastening sleeve 21. An eccentric handle 26 has a clearance hole 28 to allow the unlocking button 4 to pass. When the eccentric handle 26 rotates and the clamping part 22 clamps, the eccentric handle 26 is located outside the side wall of the fastening sleeve 21, and the clearance hole 28 will allow the unlocking button 4 to pass.

[0063] like Figures 7 to 10 As shown, the end face of the frame riser 31 facing the fastening sleeve has an upward-opening U-shaped groove 311, which is used to insert the limiting pin 112. The frame riser 31 is provided with a leaf spring 313, and the force-applying end of the leaf spring 313 has a limiting protrusion 312. Under the action of the leaf spring, the limiting protrusion 312 tends to extend outward from the frame riser 31, and in the natural state, both limiting protrusions 312 extend outward from the frame riser 31.

[0064] like Figure 10 and Figure 11As shown, when installing the connecting tube 111 and fastening sleeve 21 of the handlebar stem 11 and the frame stem 31, first loosen the eccentric handle 26, and adjust the angle of the connecting tube 111 and fastening sleeve 21 so that the limiting pin 112 passes through the pin hole and the end of the limiting pin 112 is embedded in the limiting groove 211 of the fastening sleeve 21. This completes the circumferential constraint and limiting of the connecting tube 111 and the fastening sleeve 21.

[0065] Next, insert the frame riser tube 31 into the fastening sleeve 21, and adjust the angle of the frame riser tube 31 so that the U-shaped groove 311 of the frame riser tube 31 is passed through by the limiting pin 112, thereby completing the circumferential constraint and limitation of the fastening sleeve, connecting tube, and frame riser tube. At this time, the limiting protrusion 312 will also align with the first limiting hole 27 and the second limiting hole 115, and pass through the first limiting hole 27 and the second limiting hole 115, thereby completing the axial constraint and limitation of the three. Finally, rotate the eccentric handle 26 so that the clamping part 22 clamps the connecting tube 111 and the frame riser tube 31.

[0066] During disassembly, first loosen the eccentric handle 26 and press the unlock button 4. At this time, the fastening sleeve, connecting tube and frame riser can be separated, which is very convenient.

Claims

1. A scooter with a quick-release handlebar stem, characterized in that, include: The frame riser is located in front of the foot pedal and connected to the front wheel, and its side wall is provided with a radially elastic telescopic limiting protrusion. The handlebar stem has a stem at its top; A fastening sleeve is provided at the lower end of the handlebar stem and is sleeved on the outside of the frame stem; the side wall of the fastening sleeve is provided with an axially penetrating first slit, and at least one pair of clamping parts are provided on the outside of the first slit, with the clamping parts threadedly connected to fasteners. An eccentric handle is rotatably connected to the end of the fastener, and its rotation drives the clamping part to clamp or loosen. The first limiting hole is provided on the inner wall of the fastening sleeve for the limiting protrusion to be inserted for axial limiting; The unlock button is located on the outer wall of the fastening sleeve corresponding to the first limiting hole. When pressed, it radially pushes the limiting protrusion out of the first limiting hole.

2. The scooter with a quick-release handlebar stem according to claim 1, characterized in that: The fastening sleeve and the handlebar stem are separately provided. The handlebar stem is provided with a downwardly extending connecting tube. The connecting tube is used to be inserted into the fastening sleeve and is sleeved on the outside of the frame stem. The side wall of the connecting tube is provided with a radially penetrating second limiting hole. When the fastening sleeve, connecting tube and frame stem are in the assembled state, the limiting protrusion on the frame stem can pass through the second limiting hole and the first limiting hole at the same time to achieve axial limiting of the fastening sleeve, handlebar stem and frame stem. When the unlock button is pressed, the limiting protrusion can be radially pushed out of the first limiting hole and the second limiting hole.

3. The scooter with a quick-release handlebar stem according to claim 2, characterized in that: A circumferential limiting component is provided between the fastening sleeve, the connecting pipe and the frame upright, and the circumferential limiting component includes a radially extending limiting pin; when the three are assembled in place, the limiting pin passes through the fastening sleeve, the connecting pipe and the frame upright to achieve circumferential limiting of the three.

4. The scooter with a quick-release handlebar stem according to claim 3, characterized in that: The inner wall of the end of the fastening sleeve facing the connecting pipe is provided with a limiting groove, which penetrates the end face of the fastening sleeve axially. The connecting pipe has a pin hole radially opened on its side wall; The end face of the frame riser tube facing the fastening sleeve is provided with an upward-opening U-shaped groove; When the three components are assembled, the limiting pin passes through both the pin hole and the U-shaped groove, and its end is embedded in the limiting groove to form a circumferential engagement.

5. The scooter with a quick-release handlebar stem according to claim 4, characterized in that: When the limiting pin is inserted into the pin hole and its end is embedded in the limiting groove, the first limiting hole and the second limiting hole are forcibly aligned and remain coaxial.

6. The scooter with a quick-release handlebar stem according to claim 4, characterized in that: When the limiting pin is inserted into the U-shaped groove, the limiting protrusion is aligned with the first limiting hole and the second limiting hole and remains coaxial.

7. The scooter with a quick-release handlebar stem according to claim 2, characterized in that: A circumferential positioning structure is provided between the bottom of the connecting pipe and the inner wall of the fastening sleeve. The circumferential positioning structure includes several positioning grooves provided on the connecting pipe. The positioning grooves extend axially and penetrate the bottom of the connecting pipe. A positioning block is provided on the inner wall of the fastening sleeve. When the connecting pipe and the fastening sleeve are inserted, the positioning block and the positioning groove are engaged.

8. The scooter with a quick-release handlebar stem according to claim 3, characterized in that: The connecting pipe is provided with a second gap corresponding to the first gap. When the connecting pipe is assembled with the fastening sleeve, the second gap is aligned with the first gap.

9. The scooter with a quick-release handlebar stem according to any one of claims 1 to 8, characterized in that: The frame riser is equipped with a leaf spring, and the limiting protrusion is connected to the force-applying end of the leaf spring. Under the action of the leaf spring, the limiting protrusion tends to extend outward.

10. The scooter with a quick-release handlebar stem according to any one of claims 1 to 8, characterized in that: The eccentric handle is provided with a clearance hole to avoid the unlock button.

Images