Integrated front fork of bicycle

Abstract

The utility model discloses a bicycle front fork, and particularly relates to an integrated bicycle front fork. Comprising a thick-wall pipe end, a connecting pipe end and a conical pipe end which are tubular and are sequentially connected, the thickness of the pipe wall of the thick-wall pipe end and the thickness of the pipe wall of the conical pipe end are both lower than the thickness of the pipe wall of the connecting pipe end so that the overall strength and the torsion resistance of the front fork can be improved, and the thick-wall pipe end, the connecting pipe end and the conical pipe end are integrally cast and formed. According to the integrated front fork, integrated connection of the front fork legs and the front fork columns is directly formed through casting, forging, water injection machining forming and other processes, the weakness of a traditional welding or connecting position is eliminated, the pipe wall thickness of the connecting pipe end is larger than that of the thick-wall pipe end and the conical pipe end on the two sides, the strength of a stress concentration point is improved, and the service life is prolonged. And the overall strength and the torsion resistance of the front fork are remarkably improved, so that the riding experience is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the field of bicycles, in particular to an integrated front fork of a bicycle. Background Art

[0002] As bicycles become increasingly popular as a green and environmentally friendly means of transportation worldwide, users are increasingly demanding higher performance, safety, and comfort. Traditional bicycle front forks mostly use a split design, where the fork legs and stanchion are manufactured separately and then assembled together via welding or bolting.

[0003] Although traditional welding or joint structures are mature, the connection parts are prone to become stress concentration points during long-term use, posing a potential risk of fatigue damage, affecting riding safety, sacrificing riding comfort, and reducing the overall strength and torsional resistance of the front fork. Summary of the Invention

[0004] The purpose of the utility model is to provide an integrated front fork for a bicycle, so as to solve the problem that although the traditional welding or joint structure is mature, the connection part is easy to become a stress concentration point during long-term use, posing a potential risk of fatigue damage, affecting riding safety, sacrificing riding comfort, and reducing the overall strength and torsional resistance of the front fork.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Provided is an integrated bicycle front fork, comprising a tubular thick-walled tube end, a connecting tube end, and a tapered tube end that are sequentially connected. The wall thickness of the thick-walled tube end and the tapered tube end are both thinner than the wall thickness of the connecting tube end to improve the overall strength and torsional resistance of the front fork. The thick-walled tube end, the connecting tube end, and the tapered tube end are integrally cast.

[0007] As a preferred solution for an integrated front fork of a bicycle, the connecting tube end includes a conical hollow cone connected to the thick-walled tube end and a protrusion connected to the conical tube end. One side of the conical hollow cone is vertically connected to the thick-walled tube end. The protrusion of the connecting tube end has a side wall surface and an arc surface. The side wall surface is annular and vertically connected to the conical hollow cone. The arc surface smoothly transitions to the outer surface of the conical tube end.

[0008] As a preferred solution for an integrated front fork for a bicycle, the tapered tube end and tube opening are flattened and gradually narrow along their length.

[0009] Beneficial effects of the utility model:

[0010] 1. The one-piece front fork uses casting, forging, and water injection molding to directly form an integrated connection between the fork legs and the front fork post. This not only eliminates the weaknesses of traditional welding or joints, but also increases the strength of the stress concentration point by making the connecting tube thicker than the thick-walled tube ends on both sides and the tapered tube end design, significantly improving the overall strength and torsional resistance of the front fork, making the riding experience more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0012] Figure 1 It is a cross-sectional schematic diagram of an integrated bicycle front fork according to an embodiment of the present utility model.

[0013] Figure 2 It is a three-dimensional schematic diagram of an integrated bicycle front fork according to an embodiment of the present utility model.

[0014] In the picture:

[0015] 1. Thick-walled pipe end; 2. Connecting pipe end; 3. Tapered pipe end. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0017] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0018] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0019] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0020] Reference Figures 1 to 2 As shown, the present invention discloses a manufacturing process for an integrated bicycle front fork. In this embodiment, the process includes the following steps:

[0021] A. Cutting: Cut the profiles by hydraulic sawing machine;

[0022] B. 2D forging: The cut profiles are punched into round tubes by a 2D forging punching machine;

[0023] C. 3D forging: The round tubes punched by the 2D forging stamping machine are further forged by the 3D forging machine;

[0024] D. 3D forging and extension: The two sides of the round tube that has been further forged are extruded and extended by a 3D forging machine;

[0025] E. Tube reduction machine: The round tubes completed by the 3D forging machine are reduced by the hydraulic tube reduction machine. Fixed-value core-pulling dies and fixed-value alloy eye dies are used to extract thick and thin tubes. The round tubes completed by the tube reduction machine are reduced.

[0026] F. Mold bending molding: The tapered tube that has been shrunk is bent by a hydraulic machine;

[0027] G. Water injection molding: The tapered tube formed by press bending is shaped by a water injection machine;

[0028] Through the above process, a bicycle integrated front fork of the present invention is obtained. Figure 2As shown, for this one-piece front fork of bicycle, the utility model proposes a specific embodiment, in this embodiment, it comprises a thick-walled tube end 1, a connecting tube end 2 and a tapered tube end 3 which are tubular and connected in sequence, the tube wall thickness of the thick-walled tube end 1 and the tapered tube end 3 are both smaller than the tube wall thickness of the connecting tube end 2, so as to improve the torsional resistance of the front fork, a through hole is opened in the middle of the right end face of the connecting tube end 2, the through hole is located between the tapered tube ends 3 on both sides, the connecting tube end 2 is a tapered hollow cone on the side close to the thick-walled tube end 1, the tapered side surface of the hollow cone has a uniform thickness, so that the whole cone structure is smooth and hollow, the tapered hollow cone and the inner surface of the square protrusion are smoothly transitioned, the connecting tube end 2 is a tapered cone on the side close to the tapered tube end 3 The protrusion is annular and has a square cross-section. The square protrusion of the connecting tube end 2 has a side wall surface and a curved surface. The side wall surface is annular and is vertically connected to the outer surface of the conical hollow cone. The curved surface smoothly transitions to the outer surface of the conical tube end 3. The thick-walled tube end 1, the connecting tube end 2 and the conical tube end 3 are cast as one piece to improve the overall strength of the front fork, effectively avoiding the occurrence of false welding, pinholes and air holes during traditional welding processing, preventing the tube body from loosening at the connection due to vehicle vibration during driving, thereby achieving a firm locking effect. The square protrusion of the connecting tube end 2 improves the strength and torsional resistance of the stress concentration point of the connection part, reduces the potential risk of fatigue damage, and avoids affecting riding safety.

[0029] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting but are provided for ease of description only.

Claims

1. A bicycle integrated front fork, characterized in that: The front fork comprises a thick-walled tube end (1), a connecting tube end (2) and a tapered tube end (3) which are tubular and sequentially connected. The wall thickness of the thick-walled tube end (1) and the wall thickness of the tapered tube end (3) are both lower than the wall thickness of the connecting tube end (2) to improve the overall strength and torsional resistance of the front fork. The thick-walled tube end (1), the connecting tube end (2) and the tapered tube end (3) are integrally cast.

2. The integrated bicycle front fork according to claim 1, characterized in that: The connecting pipe end (2) comprises a conical hollow cone connected to the thick-walled pipe end (1) and a protrusion connected to the conical pipe end (3); one side of the conical hollow cone is vertically connected to the thick-walled pipe end (1); the protrusion of the connecting pipe end (2) has a side wall surface and an arc surface; the side wall surface is annular and vertically connected to the conical hollow cone; the arc surface smoothly transitions to the outer surface of the conical pipe end (3).

3. The integrated bicycle front fork according to claim 1, wherein: The conical tube end (3) has a flattened opening and gradually narrows along its length.

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