Internal threading fastening bolt for folding stem

Abstract

The utility model belongs to the technical field of bicycle accessories, and discloses an internal threading fastening bolt for a folding stem, which comprises a bolt head and a thread head, a limit platform is arranged between the bolt head and the thread head, and the bolt head, the thread head and the limit platform are of an integrally formed structure. The bolt head is of a regular hexagonal prism structure, a threading hole is formed in the upper surface of the bolt head, a cylindrical cavity is formed in the thread head, and the threading hole penetrates through the limiting platform and is connected with the cavity. According to the scheme, the fastening bolt with the threading hole is used for replacing a solid fastening bolt in an existing folding stem, and the problem that wiring cannot be conducted in the folding stem is ingeniously solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bicycle accessories, more specifically, to an inner threading fastening bolt for folding handlebar. BACKGROUND

[0002] With the improvement of environmental awareness, bicycles, as a green way of travel, are more and more favored by people. Bicycle is also called pedal car or bicycle, which is a small land vehicle with two wheels, generally driven by pedaling. According to the working characteristics of each part, it can be roughly divided into guiding system, driving system and braking system.

[0003] Folding bicycle is favored by the market because of its portability. After electrification, the weight of the whole vehicle increases (the weight of battery and motor is greater than that of frame), which makes it time-consuming and laborious to move the whole vehicle in space where it cannot be ridden. Therefore, many foldable bicycles or foldable electric bicycles have been introduced to the market. Among them, foldable handlebars are essential elements of many folding bicycles or folding electric bicycles, because they can greatly reduce the space of the folded frame.

[0004] Now many electric bicycles or bicycles often hide brake lines and electrical wires in the frame for the overall appearance of the frame. Non-folding electric bicycles or bicycles can handle the problem of hiding wires well, but folding frames are not easy to handle, especially the internal wiring problem of folding handlebars. SUMMARY

[0005] The utility model aims at solving the shortcomings in the prior art and provides an inner threading fastening bolt for folding handlebar.

[0006] To solve the problems in the background art, the utility model adopts the following technical scheme:

[0007] An inner threading fastening bolt for folding handlebar, comprising a bolt head and a threaded head, a limiting platform is arranged between the bolt head and the threaded head, the bolt head, the threaded head and the limiting platform are integrally formed; the bolt head is a regular hexagonal prism structure, a threading hole is opened on the upper surface of the bolt head, a cylindrical cavity is arranged in the threaded head, and the threading hole penetrates through the limiting platform and is connected with the cavity.

[0008] As a further description of the above technical scheme: the limiting platform is a cylindrical structure, the diameter of the limiting platform cylindrical structure is 25mm-32mm, and the height of the limiting platform cylindrical structure is 2.5mm-4mm.

[0009] As a further description of the above technical solution: the diameter of the inscribed circle of the bottom surface of the bolt head is 15mm-24mm, and the threading hole is a cylindrical structure with a diameter of 5mm-20mm.

[0010] As a further description of the above technical solution: the cavity of the threaded head is a cylindrical structure with a diameter of 8mm-23mm.

[0011] As a further description of the above technical solution: the diameter of the threading hole is smaller than the diameter of the cavity.

[0012] As a further description of the above technical solution: the external thread of the threaded head is a triangular thread or a trapezoidal thread.

[0013] Compared with the prior art, the fastening bolt has the advantages that:

[0014] The fastening bolt is convenient for production and installation.

[0015] The fastening bolt with the threading hole replaces the solid fastening bolt in the folding handle stand, and ingeniously solves the problem that the folding handle stand cannot be internally threaded. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a structure schematic diagram.

[0017] Figure 2 The utility model discloses a cross section schematic diagram.

[0018] Figure 3 The utility model discloses a fastening bolt and folding handle schematic diagram.

[0019] Figure 4 The utility model discloses a fastening bolt installation schematic diagram.

[0020] Mark explanation in drawing:

[0021] 1, bolt head, 2, limiting platform, 3, threaded head, 4, threading hole, 5, round angle, 6, cavity, 7, front fork pipe, 8, front fork pipe cavity, 9, folding base fastening ring, 10, folding head, 11, handle, 12, wire pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the utility model belong to the protection scope of the utility model.

[0023] Please refer to Figure 1 and 2 The utility model provides a kind of inner threading fastening bolt for folding handlebar, including bolt head 1 and threaded head 3, limiting platform 2 is equipped between bolt head 1 and threaded head 3, bolt head 1, threaded head 3 and limiting platform 2 are integrally formed structure;Bolt head 1 is regular hexagonal prism structure, and the upper surface of bolt head 1 is provided with threading hole 4, and the inside of threaded head 3 is provided with cylindrical cavity 6, and threading hole 4 is connected with cavity 6 through limiting platform 2.The external thread of threaded head 3 is trapezoidal thread.

[0024] Limiting platform 2 is cylindrical structure, and the diameter of limiting platform 2 cylindrical structure is 31.5mm, and the height of limiting platform 2 cylindrical structure is 3.1mm.

[0025] The diameter of the inscribed circle of the bottom surface regular hexagon of bolt head 1 is 19mm, and threading hole 4 is cylindrical structure, and the diameter of threading hole 4 is 15mm.

[0026] The diameter of the cavity 6 of threaded head 3 is 18.2mm.

[0027] Specific use, please refer to Figure 3 and 4 Folding handlebar is composed of handlebar 11, folding head 10 and folding base, handlebar 11 and folding head 10 are fixedly connected, and folding head 10 is connected with folding base through hinge.Front fork tube 7 passes through folding base and is fixed by folding base fastening ring 9, and threaded head 3 is screwed into front fork tube cavity 8.One end of wire tube 12 passes through the threading hole 4 of bolt head 1, and the other end of wire tube 12 passes through folding head 10.

[0028] The above only for the preferred specific implementation of the utility model;But the protection scope of the utility model is not limited to this.Anyone skilled in the art in the technical range disclosed by the utility model, according to the technical scheme of the utility model and its improvement concept, equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. A folding in-thread fastening bolt for a handle, comprising a bolt head (1) and a threaded head (3), characterized in that: The bolt head (1) and the threaded head (3) are provided with a limiting platform (2), the bolt head (1), the threaded head (3) and the limiting platform (2) are integrally formed, the bolt head (1) is a regular hexagonal prism structure, the upper surface of the bolt head (1) is provided with a threading hole (4), the threaded head (3) is internally provided with a cylindrical cavity (6), and the threading hole (4) penetrates through the limiting platform (2) and is connected with the cavity (6).

2. The inside threading fastener bolt for folding handlebar according to claim 1, wherein: The limiting platform (2) is a cylindrical structure, the diameter of the cylindrical structure of the limiting platform (2) is 25mm-32mm, and the height of the cylindrical structure of the limiting platform (2) is 2.5mm-4mm.

3. The inside threading fastener bolt for folding handlebars according to claim 1, wherein: The diameter of the inscribed circle of the bottom surface of the regular hexagonal bolt head (1) is 15mm-24mm, the threading hole (4) is a cylindrical structure, and the diameter of the threading hole (4) is 5mm-20mm.

4. The inside threading fastener bolt for folding handlebars according to claim 1, wherein: The cavity (6) of the threaded head (3) is a cylindrical structure, and the diameter of the cavity (6) is 8mm-23mm.

5. A self-tapping fastener for folding handlebars according to claim 3 or 4, characterized in that: The diameter of the threading hole (4) is smaller than the diameter of the cavity (6).

6. The inside threading fastener bolt for folding handlebars of claim 1, wherein: The external thread of the threaded head (3) is a triangular thread or a trapezoidal thread.

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