Novel expansion screw structure adaptive to complex environment of handlebar tube of motorcycle

Abstract

The utility model belongs to the technical field of motorcycle accessories, and particularly relates to a novel expansion screw structure adaptive to the complicated environment of a motorcycle handlebar tube, which comprises a front expansion sleeve, a rear expansion sleeve and a bolt, and the outer wall surface of the front expansion sleeve comprises a front first plane and a front second plane on the upper side and the lower side; the outer wall face of the rear expansion sleeve comprises a rear first plane and a rear second plane on the upper side and the lower side, and the front first plane, the front second plane, the rear first plane and the rear second plane are used for forming a threading space with the inner hole wall of the motorcycle handlebar. A power line for supplying power to a heating part installed in the handle can penetrate through the threading space between the front expansion sleeve and the inner wall of the handle hole and the threading space between the rear expansion sleeve and the inner wall of the handle hole, the novel expansion screw structure occupies smaller space in the handle hole, enough space is reserved for the handle heating power line, handle heating is not affected, and twisting of an accelerator is not affected. In addition, the novel expansion screw structure is a narrow body structure, is small and light, and is convenient to install.

Description

Technical Field

[0001] This utility model belongs to the field of motorcycle parts technology, specifically relating to a novel expansion screw structure adapted to the complex environment of motorcycle handlebars. Background Technology

[0002] Motorcycle handlebar mirrors are rearview mirrors installed on the side of the handlebars of a motorcycle. Many riders choose to install these mirrors because they are aesthetically pleasing and do not obstruct the rider's forward view. To install a motorcycle handlebar mirror, the mounting block on the side of the handlebar is removed. An expansion sleeve is then inserted into the handlebar, and an expansion screw is passed through the screw hole at the bottom of the mirror. The expansion screw is then screwed into the expansion sleeve. As the screw is tightened, the expansion sleeve expands and secures the mirror inside the handlebar.

[0003] In the prior art, Chinese patent document with publication number CN222141733U describes a motorcycle handlebar expansion screw and plug, including components such as a plug, an outer wedge, an inner wedge, a square nut, and a bolt. This motorcycle handlebar expansion screw and plug has the following shortcomings: Since the outer wedge and the inner wedge are cylindrical as a whole, after expansion, they will fill the entire internal space of the handlebar and squeeze the handlebar heating wire, affecting the wiring and even causing damage to the wiring. Utility Model Content

[0004] The present invention aims to provide a new type of expansion screw structure that is adapted to the complex environment of motorcycle handlebar tubes, so that when installing motorcycle handlebar mirrors, it can reserve wiring space for heating wires and other internal components of the handlebar mirrors. In addition, the new expansion screw structure is relatively lightweight and easy to install.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel expansion screw structure adapted to the complex environment of motorcycle handlebars is provided, comprising a front expansion sleeve, a rear expansion sleeve, and a bolt. The front and rear expansion sleeves are respectively provided with corresponding first and second inclined surfaces. The front and rear expansion sleeves are respectively provided with a front through hole and a rear through hole for the bolt to pass through. The outer wall surface of the front expansion sleeve includes a front first arc surface and a front second arc surface on the left and right sides, and a front first plane and a front second plane on the upper and lower sides. The front first and second arc surfaces are adapted to the inner wall of the motorcycle handlebar, and the front first and second planes are used to form a threading space with the inner wall of the motorcycle handlebar. The outer wall surface of the rear expansion sleeve includes a rear first arc surface and a rear second arc surface on the left and right sides, and a rear first plane and a rear second plane on the upper and lower sides. The rear first and second arc surfaces are adapted to the inner wall of the motorcycle handlebar, and the rear first and second planes are used to form a threading space with the inner wall of the motorcycle handlebar.

[0007] Preferably, the front through hole in the front expansion sleeve is a threaded hole that matches the bolt.

[0008] Preferably, the front perforation is eccentrically arranged, close to the first front arc surface and far from the second arc surface.

[0009] Preferably, the upper and lower walls of the rear perforation are flat, while the left and right walls are arc surfaces that match the outer circumference of the bolt. The distance between the upper and lower walls is consistent with the outer diameter of the bolt.

[0010] Preferably, it also includes a sleeve and a washer for passing through the bolt.

[0011] Preferably, the front through hole is an m6 screw hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This novel expansion screw structure adapted to the complex environment of motorcycle handlebars includes a front expansion sleeve, a rear expansion sleeve, and a bolt. The front and rear expansion sleeves are respectively provided with corresponding first and second inclined surfaces. The front and rear expansion sleeves are respectively provided with front and rear through holes for the bolt to pass through. The outer wall surface of the front expansion sleeve includes upper and lower front first and second planes, which form a threading space with the inner wall of the motorcycle handlebar. The outer wall surface of the rear expansion sleeve includes upper and lower rear first and second planes, which also form a threading space with the inner wall of the motorcycle handlebar. The power cord for supplying power to the heating element installed in the handlebar can be inserted through the threading space between the front and rear expansion sleeves and the inner wall of the handlebar hole. This novel expansion screw structure occupies less space in the handlebar hole, leaving sufficient space for the handlebar heating power cord, without affecting handlebar heating or throttle operation. In addition, this new type of expansion screw has a narrow body structure, making it compact, lightweight, and easy to install. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram illustrating an embodiment of the novel expansion bolt structure adapted to the complex environment of motorcycle handlebars.

[0015] Figure 2 This is a schematic diagram of the fit between the front expansion sleeve and the rear expansion sleeve in one embodiment of the novel expansion screw structure adapted to the complex environment of motorcycle handlebars.

[0016] Figure 3This is a cross-sectional view of the front expansion sleeve and the rear expansion sleeve in one embodiment of the novel expansion screw structure adapted to the complex environment of motorcycle handlebars.

[0017] Figure 4 This is a three-dimensional structural diagram of the front expansion sleeve and the rear expansion sleeve in one embodiment of the novel expansion screw structure adapted to the complex environment of motorcycle handlebars.

[0018] Figure 5 This is a three-dimensional structural diagram of the rear expansion sleeve in one embodiment of the novel expansion screw structure adapted to the complex environment of motorcycle handlebars.

[0019] In the diagram, the labels are as follows: front expansion sleeve 1, first inclined surface 11, front through hole 12, front first arc surface 13, front second arc surface 14, front first plane 15, front second plane 16, rear expansion sleeve 2, second inclined surface 21, rear through hole 22, upper hole wall 221, lower hole wall 222, left hole wall 223, right hole wall 224, rear first arc surface 23, rear second arc surface 24, rear first plane 25, rear second plane 26, bolt 3, handle 4, handle hole 41, handle mirror 5, handle mirror through hole 51, sleeve 6, gasket 7. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In one embodiment, a novel expansion screw structure is provided to adapt to the complex environment of motorcycle handlebars, such as... Figure 1-4 As shown, this novel expansion screw structure adapted to the complex environment of motorcycle handlebars includes a front expansion sleeve 1, a rear expansion sleeve 2, and a bolt 3. The front expansion sleeve 1 and the rear expansion sleeve 2 are fitted into the handlebar hole 41 of the motorcycle handlebar 4. The front expansion sleeve 1 and the rear expansion sleeve 2 are respectively provided with corresponding first inclined surfaces 11 and second inclined surfaces 21. When the first inclined surface 11 of the front expansion sleeve 1 is misaligned with the second inclined surface 21 of the rear expansion sleeve 2, the two form an expansion effect and are squeezed together in the handlebar hole 41. The front expansion sleeve 1 and the rear expansion sleeve 2 are respectively provided with a front through hole 12 and a rear through hole 22 for the bolt 3 to pass through. The bolt 3 is inserted into the rear through hole 22 and the front through hole 12 in sequence. When the front expansion sleeve 1 and the rear expansion sleeve 2 are subjected to axial compressive force, they expand along the first inclined surface 11 and the second inclined surface 21.

[0022] Combination Figure 1-4As shown, both the front expansion sleeve 1 and the rear expansion sleeve 2 have a narrow body structure. The outer wall surface of the front expansion sleeve 1 includes the front first arc surface 13 and the front second arc surface 14 on the left and right sides, and the front first plane 15 and the front second plane 16 on the upper and lower sides. The front first arc surface 13 and the front second arc surface 14 are adapted to the inner wall of the motorcycle handlebar. After the front expansion sleeve 1 and the rear expansion sleeve 2 are misaligned and expanded, the front second arc surface 14 fits against the inner wall of the handlebar hole 41 of the motorcycle, so that the front expansion sleeve 1 can remain stable. The front first plane 15 and the front second plane 16 are used to form a threading space between themselves and the inner wall of the handlebar hole 41 of the motorcycle handlebar. Similarly, the outer wall surface of the rear expansion sleeve 2 includes the rear first arc surface 23 and the rear second arc surface 24 on the left and right sides, and the rear first plane 25 and the rear second plane 26 on the upper and lower sides. The rear first arc surface 23 and the rear second arc surface 24 are adapted to the inner wall of the motorcycle handlebar. After the front expansion sleeve 1 and the rear expansion sleeve 2 are misaligned and expanded, the rear first arc surface 23 fits against the inner wall of the handlebar hole 41 of the motorcycle, and the rear expansion sleeve 2 can remain stable. The rear first plane 25 and the rear second plane 26 are used to form a threading space with the inner wall of the motorcycle handlebar. The power cord for powering the heating element installed in the handlebar 4 can be passed through the threading space between the front expansion sleeve 1 and the rear expansion sleeve 2 and the inner wall of the handlebar hole. The heating element here refers to the handlebar heating wire, which is wrapped inside the handlebar rubber sleeve. A wire passing through the handlebar hole serves as the power cord for the heating wire. The power cord will shift by a quarter turn as the throttle is turned. This new expansion screw structure occupies less space in the handlebar hole, leaving enough space for the handlebar heating power cord, without affecting the handlebar heating or the throttle turning.

[0023] Furthermore, in combination Figure 1-4 As shown, the front through hole 12 in the front expansion sleeve 1 is a screw hole that matches the bolt 3, so that no nut is needed during installation and the bolt 3 can be directly screwed into the front through hole 12, which is more convenient.

[0024] The front perforation 12 is eccentrically arranged, close to the first front arc surface 13 and far away from the second arc surface 14. By eccentrically setting the front perforation 12, the front expansion sleeve 1 and the rear expansion sleeve 2 can be misaligned more during the screwing in of the bolt 3.

[0025] like Figure 5 As shown, the upper hole wall 221 and lower hole wall 222 of the rear through hole 22 are flat, while the left hole wall 223 and right hole wall 224 are arc surfaces that match the outer circumference of the bolt 3. The distance between the upper hole wall 221 and the lower hole wall 222 is consistent with the outer diameter of the bolt 3. This structure can restrict the bolt 3 to move in the left and right directions within the rear through hole 22, so that the front expansion sleeve 1 and the rear expansion sleeve 2 can be axially compressed and smoothly misaligned to expand.

[0026] like Figure 1As shown, the new expansion screw structure adapted to the complex environment of motorcycle handlebar tubes also includes a sleeve 6 and a washer 7 for passing through the bolt 3. When installing the handlebar mirror 5, the bolt 3 passes through the handlebar mirror through hole 51 at the bottom of the handlebar mirror 5, and then passes through the washer 7, sleeve 6, rear expansion sleeve 2 and front expansion sleeve 1 in sequence. The front end of the bolt 3 is screwed into the front through hole 12. As the bolt 3 is continuously screwed forward, the handlebar mirror 5 pushes the sleeve inward through the washer 7. The sleeve 6 can push the rear expansion sleeve 2 and the front expansion sleeve 1 into the handlebar hole 41. When the rear expansion sleeve 2 and the front expansion sleeve 1 are axially compressed, they expand along the first inclined surface 11 and the second inclined surface 21 and are squeezed into the handlebar hole 41, thereby fixing the handlebar mirror 5 to the end of the handlebar 4.

[0027] The front through hole 12 in the front expansion sleeve 1 is an M6 screw hole. The thickness of the rear expansion sleeve 2 and the front expansion sleeve 1 can be slightly larger than the outer diameter of the screw hole, making them relatively lightweight and narrow structure. By setting the rear through hole 22, the rear expansion sleeve 2 is basically hollow, with low weight, and is easy to install.

[0028] The novel expansion screw structure adapted to the complex environment of motorcycle handlebar tubes, as described in the above embodiments, is specifically designed for Victoria motorcycle handlebar mirrors. It aims to solve the problem of conventional expansion screws being unusable due to the presence of heating wires inside the original handlebar tube. This novel expansion screw structure features a cleverly designed upper and lower surface for the front expansion sleeve 1 and rear expansion sleeve 2. The thickness of the front expansion sleeve 1 and rear expansion sleeve 2 allows for precise positioning of the M6 ​​threaded bolt 3, ensuring a secure connection to the handlebar mirror without interfering with the arrangement of the heating wires inside the handlebar tube. The front expansion sleeve 1 and rear expansion sleeve 2 adopt a unique narrow-body shape. By controlling the dimensions of thickness, width, and other parts, they cleverly avoid the heating wires, allowing for smooth installation in the narrow space inside the handlebar tube. Furthermore, the hollowed-out structure inside the expansion sleeve reduces weight while optimizing the mechanical structure, ensuring a secure expansion and tightening effect. This enables reliable installation of the handlebar mirror in complex handlebar tube environments, providing an efficient and safe solution for motorcycle handlebar mirror installation.

[0029] It should be noted that, unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains, and terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art. It should also be understood that the above is a description of this disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of this disclosure have been described, those skilled in the art will readily understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this invention. Therefore, all such modifications are intended to be included within the scope of this disclosure as defined in the claims, and will not be detailed here.

Claims

1. A novel expansion bolt structure adapted to the complex environment of motorcycle handlebars, comprising a front expansion sleeve, a rear expansion sleeve, and a bolt, wherein the front expansion sleeve and the rear expansion sleeve are respectively provided with corresponding first and second inclined surfaces, and the front expansion sleeve and the rear expansion sleeve are respectively provided with a front through hole and a rear through hole for the bolt to pass through, characterized in that: The outer wall surface of the front expansion sleeve includes a first front arc surface and a second front arc surface on the left and right sides, and a first front plane and a second front plane on the upper and lower sides. The first front arc surface and the second front arc surface are adapted to the inner wall of the motorcycle handlebar. The first front plane and the second front plane are used to form a threading space with the inner wall of the motorcycle handlebar. The outer wall surface of the rear expansion sleeve includes a first rear arc surface and a second rear arc surface on the left and right sides, and a first rear plane and a second rear plane on the upper and lower sides. The first rear arc surface and the second rear arc surface are adapted to the inner wall of the motorcycle handlebar. The first rear plane and the second rear plane are used to form a threading space with the inner wall of the motorcycle handlebar.

2. The novel expansion screw structure adapted to the complex environment of motorcycle handlebars as described in claim 1, characterized in that: The front through hole in the front expansion sleeve is a threaded hole that matches the bolt.

3. The novel expansion screw structure adapted to the complex environment of motorcycle handlebars as described in claim 2, characterized in that: The front perforation is eccentrically arranged, close to the first front arc surface and far from the second arc surface.

4. The novel expansion screw structure adapted to the complex environment of motorcycle handlebars as described in claim 3, characterized in that: The upper and lower walls of the rear perforation are flat, while the left and right walls are arc surfaces that match the outer circumference of the bolt. The distance between the upper and lower walls is consistent with the outer diameter of the bolt.

5. The novel expansion screw structure adapted to the complex environment of motorcycle handlebars as described in claim 4, characterized in that: It also includes sleeves and gaskets for passing through the bolts.

6. The novel expansion screw structure adapted to the complex environment of motorcycle handlebars as described in claim 2, characterized in that: The front through hole is an m6 screw hole.

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