Tool-less disassembly handle stand

Abstract

This invention discloses a tool-free stem disassembly method, including a fork stem and a handlebar stem inserted from top to bottom into the fork stem. The upper end of the fork stem has a threaded connection portion with external threads on its outer side. A nut is fitted onto the handlebar stem, and the lower part of the nut has an upper threaded connection portion that matches and is fixed to the threaded connection portion. The upper threaded connection portion has internal threads. An axial limiting mechanism is provided between the nut and the handlebar stem, and an upper positioning mechanism is provided between the upper end of the fork stem and the handlebar stem. This invention uses a nut to secure the handlebar stem to the fork stem, enabling manual operation. Compared to traditional wrench-based installation methods, this is more convenient and simpler, and can be performed anytime, anywhere.

Description

Technical Field

[0001] This invention relates to a tool-free disassembly stem. Background Technology

[0002] Bicycle handlebars are typically connected to the fork seat tube via a stem assembly to control bicycle steering. Currently, the upper end of the stem assembly is usually detachably connected to the handlebars, while the lower end inserts into the fork seat tube and is connected via a screw and wedge nut. Of course, there are many variations of the existing stem assembly, but its basic principle has remained largely unchanged.

[0003] The existing stems generally require a wrench for disassembly and installation, so they cannot be installed without the necessary tools. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a tool-free stem disassembly method, effectively solving the issues mentioned in the background section.

[0005] The technical solution adopted in this invention is:

[0006] A tool-free disassembly stem includes a fork stem and a handlebar stem inserted from top to bottom into the fork stem. The upper end of the fork stem has a threaded connection portion, and the outer side of the threaded connection portion has an external thread. The handlebar stem is fitted with a nut, and the lower part of the nut has an upper threaded connection portion that matches and is fixed to the threaded connection portion. The upper threaded connection portion has an internal thread. An axial limiting mechanism is provided between the nut and the handlebar stem. An upper positioning mechanism is provided between the upper end of the fork stem and the handlebar stem.

[0007] Preferably, the axial limiting mechanism includes an elongated hole that penetrates the handlebar stem radially, and an axial sliding pin that is matched and disposed within the elongated hole, wherein the axial sliding pin is fixed to a nut.

[0008] Preferably, the inner side of the upper end of the nut is provided with an axial sliding pin mounting groove, the axial sliding pin is disposed in the axial sliding pin mounting groove, and a pressure cap is provided on the upper part of the axial sliding pin in the axial sliding pin mounting groove, the pressure cap being fixed to the nut.

[0009] Preferably, the side of the pressure cap has at least two inner mounting holes, and the side of the nut has an outer mounting hole that matches the inner mounting holes. The pressure cap and the nut are fixed by fasteners, which pass through the outer mounting hole and the inner mounting hole from the outside to the inside.

[0010] Preferably, the upper positioning mechanism includes an axial sliding pin and an upper positioning groove formed on the upper end of the fork steerer tube, the upper positioning groove being matched with the axial sliding pin.

[0011] The axial sliding pin inside the nut is used not only for axial limiting and circumferential rotation of the nut, but also directly for circumferential positioning between the handlebar stem and the fork stem. It serves two purposes and has a simple and reasonable structure.

[0012] Preferably, a lower positioning mechanism is provided between the lower end of the handlebar stem and the fork stem.

[0013] Preferably, the lower positioning mechanism includes a lower positioning groove formed at the lower end of the handlebar stem and a conical head fixed inside the fork stem, wherein the upper end of the conical head is provided with a lower positioning block that matches the lower positioning groove.

[0014] Preferably, the tapered head is fixed inside the fork steerer tube by a fixing mechanism. The fixing mechanism includes a connecting tube, a lower positioning pin between the connecting tube and the fork steerer tube, and an upper positioning pin between the connecting tube and the tapered head. The lower part of the connecting tube has a first lower positioning hole that matches the lower positioning pin, the upper part of the fork steerer tube has a second lower positioning hole that matches the lower positioning pin, the upper part of the connecting tube has a first upper positioning hole that matches the upper positioning pin, and the tapered head has a second upper positioning hole that matches the upper positioning pin in the radial direction.

[0015] The tapered head is fixed to the axis of the fork steer tube via a connecting tube. The tapered head enables the handlebar steer tube to be coaxially positioned within the fork steer tube, and the lower positioning block at the top enables circumferential positioning, ensuring that the handlebar steer tube is in the correct position when fixed to the fork steer tube, facilitating handlebar installation.

[0016] Preferably, the nut is an injection molded part, the upper threaded connection part is a metal part, the upper threaded connection part is coaxially fixed inside the nut, and the internal thread of the upper threaded connection part is located inside the upper threaded connection part.

[0017] The nut combines injection-molded and metal parts, which reduces the cost and weight of the nut while ensuring its fixed strength. It also makes it easier to set an anti-slip structure on the outer circumference of the nut for easy gripping and rotation. This structure is more reasonable.

[0018] This invention uses a screw nut to fasten the handlebar stem to the fork stem, thus enabling manual operation. Compared with the traditional method of using a wrench for installation and fixing, it is more convenient and simple, and can be operated anytime and anywhere.

[0019] This invention employs a dual positioning mechanism consisting of an upper positioning mechanism and a lower positioning mechanism to achieve double protection, thereby improving positioning strength and stability, while also reducing the shaking that occurs when the handlebar stem is inserted into the fork stem. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the front fork steerer tube.

[0022] Figure 3 for Figure 2 A schematic diagram of the side structure;

[0023] Figure 4 This is a schematic diagram of the handlebar stem.

[0024] Figure 5 This is a schematic diagram of the structure of a spiral mother.

[0025] Figure 6 This is a schematic diagram of a partial cross-sectional view of the spiral mother.

[0026] Figure 7 for Figure 6 A schematic diagram of the side structure;

[0027] Figure 8 This is a schematic diagram of the gland structure;

[0028] Figure 9 This is a cross-sectional view of the gland structure;

[0029] Figure 10 for Figure 9 AA section view;

[0030] Figure 11 This is a schematic diagram of the connecting pipe structure;

[0031] Figure 12 This is a schematic diagram of the conical head structure;

[0032] Figure 13 This is a cross-sectional view of the conical head. Detailed Implementation

[0033] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Furthermore, in the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0040] like Figure 1-9 As shown, a tool-free disassembly stem includes a fork stem 1 and a handlebar stem 2 inserted from top to bottom into the fork stem 1. The upper end of the fork stem 1 is provided with a lower threaded connection part 3, and the outer side of the lower threaded connection part 3 is provided with an external thread. The handlebar stem 2 is provided with a nut 4, and the lower part of the nut 4 is provided with an upper threaded connection part 5 that matches and is fixed to the lower threaded connection part 3. The upper threaded connection part 5 is provided with an internal thread. An axial limiting mechanism is provided between the nut 4 and the handlebar stem 2. An upper positioning mechanism is provided between the upper end of the fork stem 1 and the handlebar stem 2.

[0041] The axial limiting mechanism includes an elongated hole 6 that penetrates the handlebar stem 2 radially, and an axial sliding pin 7 that is matched and disposed within the elongated hole 6. The axial sliding pin 7 is fixed to the nut 4.

[0042] An axial sliding pin mounting groove 8 is provided on the inner side of the upper end of the nut 4. The axial sliding pin 7 is set in the axial sliding pin mounting groove 8. A pressure cover 9 is provided on the upper part of the axial sliding pin 7 in the axial sliding pin mounting groove 8. The pressure cover 9 is fixed to the nut 4.

[0043] The pressure cap 9 has at least two inner mounting holes 10 on its side, and the nut 4 has an outer mounting hole 11 on its side that matches the inner mounting holes 10. The pressure cap 9 and the nut 4 are fixed by fasteners. The fasteners pass through the outer mounting hole 11 and the inner mounting hole 10 from the outside to the inside, and the inner end of the fasteners is fixed to the inner mounting hole 10.

[0044] The upper positioning mechanism includes an axial sliding pin 7 and an upper positioning groove 12 formed on the upper end of the front fork vertical tube 1. The upper positioning groove 12 matches the axial sliding pin 7. The upper positioning groove 12 is flared in shape, with the upper part larger than the lower part. The axial sliding pin 7 fits into the bottom of the upper positioning groove 12, and the top opening of the upper positioning groove 12 is larger than the outer diameter of the axial sliding pin 7.

[0045] A lower positioning mechanism is provided between the lower end of the handlebar stem 2 and the front fork stem 1.

[0046] The lower positioning mechanism includes a lower positioning groove 13 formed at the lower end of the handlebar stem 2, and a conical head 14 fixed inside the fork stem 1. The upper end of the conical head 14 is provided with a lower positioning block 15 that matches the lower positioning groove 13.

[0047] The tapered head 14 is fixed inside the fork steer tube 1 by a fixing mechanism. The fixing mechanism includes a connecting tube 16, a lower positioning pin 17 between the connecting tube 16 and the fork steer tube 1, and an upper positioning pin 18 between the connecting tube 16 and the tapered head 14. The lower part of the connecting tube 16 has a first lower positioning hole 19 that matches the lower positioning pin 17 and the first lower positioning hole 19 radially penetrates the connecting tube 16. The fork steer tube 1 has a second lower positioning hole 22 that matches the lower positioning pin 17 and the second lower positioning hole 22 radially penetrates the fork steer tube 1. The upper part of the connecting tube 16 has a first upper positioning hole 20 that matches the upper positioning pin 18 and the first upper positioning hole 20 radially penetrates the connecting tube 16. The tapered head 14 has a second upper positioning hole 21 that matches the upper positioning pin 18 in the radial direction.

[0048] The nut 4 is an injection molded part, and the threaded connection part 5 is a metal part. The threaded connection part 5 is coaxially fixed inside the nut 4, and the internal thread of the threaded connection part 5 is located inside the threaded connection part 5.

[0049] Figure 2-3 The structure of the fork steerer tube is illustrated. The upper end of the fork steerer tube 1 is provided with a threaded connection part 3. The outer side of the threaded connection part 3 is provided with an external thread. The lower part of the fork steerer tube 1 is provided with a second lower positioning hole 22, which radially penetrates the fork steerer tube 1. During assembly, the connecting tube 16 is inserted into the fork steerer tube 1. The second lower positioning hole 22 on the fork steerer tube 1 and the first lower positioning hole 19 on the connecting tube 16 are fixed by a lower positioning pin 17. The threaded connection part 3 at the upper end of the fork steerer tube 1 is engaged with the nut 4 for locking and fixing. An upper positioning groove 12 is opened at the upper end of the fork steerer tube 1. The upper positioning groove 12 matches the axial sliding pin 7 to achieve circumferential positioning.

[0050] Figure 4 The diagram illustrates the structure of the handlebar stem. The upper end of the handlebar stem 2 is used to install the handlebar, and the lower end is provided with a lower positioning groove 13. The lower positioning groove 13 is used to match the lower positioning block 15 on the tapered head 14 to achieve positioning. The middle part is provided with an elongated hole 6, which penetrates the handlebar stem 2 radially upward. The elongated hole 6 matches the axial sliding pin 7 fixed on the nut 4. The axial sliding pin 7 can slide along the axial direction of the handlebar stem 2 in the elongated hole 6. During assembly, the lower end of the handlebar stem 2 is inserted into the fork stem 1, and the axial sliding pin 7 is inserted into the elongated hole 6 radially along the handlebar stem 2. The lower positioning groove 13 is locked outside the lower positioning block 15 for positioning.

[0051] Figure 5-7The diagram illustrates the structure of the nut. The upper inner side of the nut 4 has an axial sliding pin mounting groove 8 for mounting the axial sliding pin 7. A pressure cap 9 seals the axial sliding pin 7 within the groove 8, allowing it to achieve axial positioning and circumferential rotation. The lower end has an upper threaded connection part 5 with internal threads. This upper threaded connection part 5 matches the lower threaded connection part 3 on the fork steerer tube 1. The nut 4 is an injection-molded part, such as hard plastic, while the upper threaded connection part 5 is a metal part, such as a nut, with a hexagonal cross-section, ensuring a secure circumferential fixation to the nut 4 without creating any relative contact. The nut 4 is rotated, and its inner side has an internal thread that can match the external thread on the lower threaded connection part 3. The nut 4 adopts a structure that combines injection-molded parts and metal parts, which not only reduces the manufacturing cost of the nut 4, but also ensures the fastening effect. At the same time, the outer circumference of the nut 4 has multiple circumferentially distributed arc-shaped grooves 23. The arc-shaped grooves 23 make it easy to hold and rotate. The nut 4 has an external mounting hole 11 on the side of the axial sliding pin mounting groove 8. The external mounting hole 11 matches the internal mounting hole 10 on the pressure cap 9 and is fixed by fasteners. In use, the upper threaded connection part 5 and the lower threaded connection part 3 can be tightened and loosened by rotating the nut 4.

[0052] Figure 8-10 The structure of the pressure cap is illustrated. The axis of the pressure cap 9 matches the handlebar stem 2 and can slide up and down along the handlebar stem 2. The lower end of the pressure cap 9 matches the axial sliding pin mounting groove 8 and can be pressed into the axial sliding pin mounting groove 8. When pressed in, a small gap is left between the lower end of the pressure cap 9 and the axial sliding pin 7 at the bottom of the axial sliding pin mounting groove 8, so that the axial sliding pin 7 can rotate in the circumferential direction and be limited in the axial direction. The side of the pressure cap 9 is provided with at least two inner mounting holes 10, which match the outer mounting holes 11 on the nut 4 and are fixed by fasteners. The lower side of the pressure cap 9 has grooves 24 between adjacent inner mounting holes 10. The grooves 24 can save material for the pressure cap 9 while ensuring the use effect of the pressure cap 9, reduce the weight of the pressure cap 9, and avoid the deformation of the pressure cap 9 made of plastic due to excessive thickness.

[0053] Figure 11The structure of the connecting tube is illustrated. The lower part of the connecting tube 16 has a first lower positioning hole 19, which radially penetrates the connecting tube 16. The first lower positioning hole 19 matches the second lower positioning hole 22 on the front fork steer tube 1. The first lower positioning hole 19 and the second lower positioning hole 22 are relatively fixed by a lower positioning pin 17. The upper part of the connecting tube 16 has a first upper positioning hole 20, which radially penetrates the connecting tube 16. The first upper positioning hole 20 matches the second upper positioning hole 21 on the conical head 14. The second upper positioning hole 21 and the second upper positioning hole 21 are relatively fixed by an upper positioning pin 18.

[0054] Figure 12 , 13 The structure of the conical head is illustrated. The upper end of the conical head 14 is tapered, with a smaller top and a larger bottom, which guides the handlebar stem 2 during assembly, facilitating coaxial fixation between the handlebar stem 2 and the conical head 14. Simultaneously, to enhance the positioning between the handlebar stem 2 and the fork stem 1, the lower end of the handlebar stem 2 is circumferentially positioned. Two lower positioning blocks 15 are symmetrically arranged on both sides of the second upper positioning hole 21. During assembly, the second upper positioning hole 21 is matched and fixed with the first upper positioning hole 20 on the connecting pipe 16 via the upper positioning pin 18. The two lower positioning blocks 15 are engaged in the lower positioning groove 13 at the lower end of the handlebar stem 2. An axial through hole can be provided at the axial center of the conical head 14 to reduce its weight.

[0055] Assembly method of the present invention:

[0056] 1. Insert the upper positioning pin 18 into the second upper positioning hole 21 and the first upper positioning hole 20 to fix the connecting tube 16 and the conical head 14;

[0057] 2. Insert the connecting tube 16 and the tapered head 14 together into the front fork vertical tube 1, so that the first lower positioning hole 19 is aligned with the second lower positioning hole 22, and fix it with the lower positioning pin 17;

[0058] 3. Place the pressure cap 9 on the outside of the handlebar stem 2 from bottom to top and position it above the elongated hole 6. Then, insert the axial sliding pin 7 radially into the elongated hole 6. Next, place the screw nut 4 on the outside of the handlebar stem 2 from bottom to top until the axial sliding pin 7 abuts against the axial sliding pin mounting groove 8. At this time, adjust the relative position of the screw nut 4 and the pressure cap 9 so that the inner mounting hole 10 is aligned with the outer mounting hole 11. Finally, fix the pressure cap 9 and the screw nut 4 with fasteners to complete the installation of the screw nut 4 on the handlebar stem 2.

[0059] 4. Insert the lower end of the handlebar stem tube 2 into the fork stem tube 1 from top to bottom, and adjust their relative positions in the circumferential direction so that the upper positioning groove 12 at the upper end of the fork stem tube 1 is engaged with the axial sliding pin 7, while the lower positioning groove 13 at the lower end of the handlebar stem tube 2 is engaged with the lower positioning block 15 on the tapered head 14. At this time, the axial sliding pin 7 will slide along the axial direction to the middle and upper part of the elongated hole 6.

[0060] 5. Rotate the nut 4 by hand to tighten the upper threaded connection 5 and the lower threaded connection 3 on the fork stem 1. At this time, the axial sliding pin 7 will slide axially to the lower part of the elongated hole 6. When the axial sliding pin 7 slides to the bottom of the elongated hole 6, the upper threaded connection 5 and the lower threaded connection 3 on the fork stem 1 will tighten together, thus completing the assembly of the stem 2 and the fork stem 1.

[0061] When disassembling the stem 2 and the fork steerer tube 1, simply rotate the nut 4 in the reverse direction.

[0062] Therefore, it can be seen that the present invention can be disassembled and installed without tools, and is very convenient and simple to operate, and can be disassembled and installed anytime and anywhere.

[0063] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this invention should be considered within the scope of protection of this invention.

Claims

1. A tool-free disassembly stem, characterized in that, The system includes a fork stem (1) and a handlebar stem (2) inserted from top to bottom into the fork stem (1). The upper end of the fork stem (1) is provided with a threaded connection (3), and the outer side of the threaded connection (3) is provided with an external thread. The handlebar stem (2) is provided with a nut (4), and the lower part of the nut (4) is provided with an upper threaded connection (5) that matches and is fixed to the threaded connection (3). The upper threaded connection (5) is provided with an internal thread. An axial limiting mechanism is provided between the nut (4) and the handlebar stem (2). An upper positioning mechanism is provided between the upper end of the fork stem (1) and the handlebar stem (2). A lower positioning mechanism is provided between the lower end of the handlebar stem (2) and the fork stem (1). The lower positioning mechanism includes a lower positioning groove (13) opened at the lower end of the handlebar stem (2) and a conical head (1) fixed in the fork stem (1). 4) The upper end of the conical head (14) is provided with a lower positioning block (15) that matches the lower positioning groove (13). The conical head (14) is fixed in the front fork steer tube (1) by a fixing mechanism. The fixing mechanism includes a connecting tube (16), a lower positioning pin (17) between the connecting tube (16) and the front fork steer tube (1), and an upper positioning pin (18) between the connecting tube (16) and the conical head (14). The lower part of the connecting tube (16) is provided with a first lower positioning hole (19) that matches the lower positioning pin (17). The front fork steer tube (1) is provided with a second lower positioning hole (22) that matches the lower positioning pin (17). The upper part of the connecting tube (16) is provided with a first upper positioning hole (20) that matches the upper positioning pin (18). The conical head (14) is provided with a second upper positioning hole (21) that matches the upper positioning pin (18) in the radial direction.

2. The tool-free disassembly stem according to claim 1, characterized in that, The axial limiting mechanism includes an elongated hole (6) that penetrates the handlebar stem (2) in the radial direction, and an axial sliding pin (7) that is matched and disposed in the elongated hole (6), wherein the axial sliding pin (7) is fixed to the nut (4).

3. The tool-free disassembly stem according to claim 2, characterized in that, The upper inner side of the nut (4) is provided with an axial sliding pin mounting groove (8), the axial sliding pin (7) is set in the axial sliding pin mounting groove (8), and the axial sliding pin mounting groove (8) is provided with a pressure cap (9) on the upper part of the axial sliding pin (7), and the pressure cap (9) is fixed to the nut (4).

4. The tool-free disassembly stem according to claim 3, characterized in that, The pressure cap (9) has at least two inner mounting holes (10) on its side, and the nut (4) has an outer mounting hole (11) that matches the inner mounting holes (10) on its side. The pressure cap (9) and the nut (4) are fixed by fasteners, which pass through the outer mounting hole (11) and the inner mounting hole (10) from the outside to the inside.

5. The tool-free disassembly stem according to claim 2, characterized in that, The upper positioning mechanism includes an axial sliding pin (7) and an upper positioning groove (12) opened on the upper end of the front fork vertical tube (1), the upper positioning groove (12) matching the axial sliding pin (7).

6. The tool-free disassembly stem according to claim 1, characterized in that, The nut (4) is an injection molded part, the threaded connection part (5) is a metal part, the threaded connection part (5) is coaxially fixed inside the nut (4), and the internal thread of the threaded connection part (5) is located inside the threaded connection part (5).

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