CN200951811Y - bicycle frame components - Google Patents

Abstract

A frame member of bicycle is composed of more than two hollow metal tubes welded together, a hydraulic die for expanding said metal tubes and their welded parts, and more than one relief-shaped shaping body outside said frame member.

Description

bicycle frame components

technical field

The utility model relates to a frame member structure of a bicycle frame, in particular to a bicycle with a three-dimensional embossed body formed integrally on the surface of the pipe with hydraulic forming technology and a mold after hollow metal pipe fittings are relatively welded and connected. Architecture components.

Background technique

At present, in terms of the structure design of the bicycle frame, in addition to actively paying attention to the handling, safety and comfort requirements of riding, more and more attention has been paid to the structural strength, weight and appearance of the frame. , in order to improve the quality of products to attract consumers' favor and purchase.

Among them, in order to allow the frame pipe fittings of the bicycle frame to form a three-dimensional embossed shape design, the current general method is to use die-casting to form a three-dimensional embossed shape on each metal pipe fitting, and then weld each metal pipe fitting. The methods are combined with each other to make a frame member with a three-dimensional embossed shape. However, the vehicle frame members made by the existing molding method not only have the problems of poor structural strength of each metal pipe fitting, extremely labor-intensive and time-consuming molding respectively, and high manufacturing cost, but also after the metal pipe fittings are welded and connected to each other, different metal pipe fittings will be separated from each other. It is difficult to accurately align the modeling body at the connecting part, which seriously damages the integrity and aesthetics of the three-dimensional embossed modeling body.

Furthermore, at present, although there are relevant industry players who have developed such as Japan's No. 56-136245 open patent bulletin, Taiwan's announcement number No. 582352 "one-piece (ONE-PIECE) front triangle frame for bicycles" and Taiwan's publication number No. 200600400 Patent documents such as "In-Hot Pipe Hydroforming Method and Frame Pipe Fittings" disclose that a single metal pipe is directly expanded and formed into a one-piece frame member by hydroforming. However, due to the deformation of the metal pipe If it is too large, not only the manufacturing conditions and costs are quite high, but also most metal pipe fittings will be perforated or torn during the expansion process and fail to form. According to the existing related manufacturing technology, it is obvious that it has not yet reached the level of specific commercial implementation. Unable to meet the needs of the industry.

Contents of the invention

In order to solve the shortcomings and limitations of the existing bicycle frame components directly forming three-dimensional modeling decoration, the main purpose of the utility model is to provide a method of welding and connecting hollow metal pipes, using hydraulic forming technology to cooperate with molds on the surface of the frame components. The frame member of a bicycle with a three-dimensional embossed shape is integrally formed, which effectively solves the problems of troublesome manufacturing and molding, insufficient strength, and incomplete shape of the existing frame members with three-dimensional modeling, and greatly improves the frame. The practical efficiency and industrial utilization value of the three-dimensional embossed shape of the component.

Based on the above-mentioned purpose, the technical means used in the utility model is to provide a bicycle frame member, which includes:

A tube is a hollow metal tube;

More than one hollow metal pipe fittings welded and connected to the head pipe in an intersecting pattern, each metal pipe fitting and the head pipe and mutual welded parts are hydraulically expanded and molded to form a continuous surface;

More than one three-dimensional embossed modeling body that protrudes from the surface of the frame member and connects the frame members into one.

Preferably, the head pipe of the present invention and the hollow interiors of the metal pipe fittings form a connected pattern.

Preferably, the utility model includes a metal pipe fitting, and the metal pipe fitting constitutes an upper pipe whose front end intersects with the head pipe.

Preferably, the utility model includes a metal pipe fitting, and the metal pipe fitting constitutes a down pipe whose front end intersects with the head pipe.

Preferably, the utility model includes two metal pipe fittings, which respectively constitute an upper pipe and a lower pipe whose front ends intersect and connect with the head pipe.

Preferably, the present utility model includes four metal pipe fittings, respectively forming an upper tube and a lower tube intersecting with the head tube at the front end, a seat tube connected to the rear end of the upper tube, and a horizontally fixed on the The rear end of the down tube and the bottom bracket at the bottom end of the seat tube.

Preferably, the hollow interior of each metal pipe fitting of the present invention is in a connected form.

The bicycle frame member provided by the utility model can obtain advantages and efficiency improvements at least including:

1. After the frame member of the utility model is completed, the embryo is placed into a mold with a molding groove and the embryo is directly expanded and formed by hydraulic forming technology. Therefore, an integral and continuous three-dimensional embossing shape can be formed on the surface of the pipe of the frame member. Compared with the existing frame members formed by die-casting and welding metal pipe fittings, the convex molding body of the present invention has practical effects such as simple and fast manufacture, low cost, and a complete and beautiful molding body.

2. The vehicle frame member of the present utility model is directly expanded and formed by hydraulic forming technology after each metal pipe fitting is welded and connected to each other to form a preliminary body of the vehicle frame member. It is against the mold cavity of the mold, so during the hydraulic expansion molding process, it can strengthen the connection shape of the pipe fittings and produce a homogenization effect, effectively improving the structural strength of the frame members.

3. The utility model cooperates with the mold to expand the initial blank of the frame member into a frame member by hydraulic forming technology. Compared with the existing welded frame member, the utility model has a very high forming accuracy and greatly improves the cost. The quality of the vehicle frame, and the hydroforming technology can be specifically implemented and applied to the vehicle frame components with more than two connecting pipes, which has great industrial application value.

4. The utility model utilizes a small number of vehicle frame member embryos, that is, it can manufacture and form a variety of vehicle frame components with different three-dimensional embossed decorative shapes, effectively increasing the vehicle frame components in terms of appearance and shape specifications. Variation potency.

Brief description of the drawings

Fig. 1 is a schematic diagram of the structural configuration of the first preferred embodiment of the utility model applied to a bicycle rack.

Fig. 2 is a schematic diagram A of the molding process of the first preferred embodiment of the present invention.

Fig. 3 is a schematic diagram B of the forming process of the first preferred embodiment of the present invention.

Fig. 4 is a schematic structural view of the first preferred embodiment of the present invention.

Fig. 5 is a schematic diagram of the structural configuration of the second preferred embodiment of the present invention applied to a bicycle rack.

Fig. 6 is a schematic diagram of the molding process of the second preferred embodiment of the present invention.

Fig. 7 is a schematic diagram of the structural configuration of the third preferred embodiment of the present invention applied to a bicycle rack.

Fig. 8 is a schematic diagram of the molding process of the third preferred embodiment of the present invention.

Detailed ways

In order to understand the technical features and practical effects of the present utility model in detail, and to implement it according to the contents of the specification, the detailed description of the preferred embodiment as shown in the figure is as follows:

The utility model provides a frame member of a bicycle. The first preferred embodiment of the utility model is shown in FIG. 1. The frame member 10 includes a connected head pipe 11 and an upper pipe 12, and can further cooperate with the assembly and connection of the lower tube A, a first tube B, a bottom bracket tube C and a rear fork D to form a complete bicycle frame; wherein, the hollow upper tube 12 of the frame member 10 is The tube body is welded and connected to the hollow head tube 11 with the front ends intersecting, and the hollow tube grooves of the two form a connected shape. The head tube 11 and the upper tube 12 are expanded and formed by using hydroforming technology with the mold, so that the entire frame member 10 forms a continuous surface, and at the same time, on the outside of the frame member 10, more than one three-dimensional embossed modeling body 100 protruding from the surface of the frame member 10 and connecting the frame members 10 into one is formed, thereby increasing the frame size. The practical performance of the component 10 in terms of structural strength, shape specifications and appearance.

Please refer to Figure 1-4 for the processing and forming method of the present utility model. The utility model is based on the size and shape of the vehicle frame member 10 to be formed, and selects two corresponding to the head pipe 11 and the upper pipe respectively. The metal pipe fittings 11A and 12A of 12 are generally the best aluminum alloy pipes; A notch-shaped connection portion 122 is formed at the front end, and the two metal pipe fittings 11A, 12B are welded and connected to each other to form a vehicle frame member blank 10A before expansion and molding as shown in FIG. 3 . The blank 10A forms a welded part 30 at the connecting part of the head pipe 11 and the upper pipe 12, and based on the needs of hydroforming, one end of the head pipe 11 is sealed with a sealing piece 20;

As shown in Figure 3, the vehicle frame member blank 10A is placed into a selected mold 50, the mold 50 is provided with a mold cavity 51 corresponding to the vehicle frame component 10 to be formed, and two mold grooves 51 are connected respectively. The notch 52 of the frame member 10, and more than one molding groove 53 for molding the molded body 100 in the frame member 10; the frame member blank 10A is placed in the mold cavity 51 of the mold 50, and the frame member blank 10A is The two openings of the two openings are respectively opposite to the notches 52 of the mold 50, and then the two hydraulic mechanism joints 54 are respectively inserted through the notches 52 of the mold 50 and inserted into the openings of the blank 10A of the frame member, and then the high-pressure liquid Injecting the initial body 10A of the frame member, with proper heating to improve the ductility and expansion efficiency of the initial body 10A of the frame member, that is, the initial body 10A of the frame member can expand and expand, and the outer surface can be closely attached to the mold 50 The mold groove 51 and the molding groove 53 are expanded and formed into the frame member blank 10B as shown in FIG. Homogenization effect, improve the structural strength of frame components;

As shown in Figures 3 and 4, the seal and redundant parts of the frame member blank 10B are cut off, and then after simple trimming, it can be quickly made into a head tube 11 and an upper tube as shown in Figures 1 and 4. 12 frame members 10 .

Please refer to the second preferred embodiment shown in Figure 5 for the implementation of the utility model. B. The assembly and connection of a bottom bracket tube C and a rear fork D form a complete bicycle frame; wherein, the upper tube 12 and the lower tube 13 of the frame member 10 are tubes connected to the head tube 11 by welding at the front end The upper and lower positions, and the hollow pipe grooves of the pipe fittings form a connected form. The pipe fittings are expanded and formed by using hydroforming technology with the mold, so that the outer surface and connection parts of the entire frame member 10 are smooth and smooth. The exterior of the frame member 10 forms more than one three-dimensional embossed modeling body 100 molded by a mold.

Please refer to Figs. 5 and 6, the forming method of the second preferred embodiment of the vehicle frame member 10 is to select three metal pipe fittings 11A, 12A, 13A respectively corresponding to the head pipe 11, the upper pipe 12 and the lower pipe 13, Among them, a communication hole 112 is provided at the connecting part of the first metal pipe 11A on the upper and lower positions of the pipe, and the three metal pipes 11A, 12B, 13A are welded and connected by welding to form a vehicle frame before expansion Component blank 10A, the frame component blank 10A is formed with a welded part 30 at the connecting parts of the head tube 11, the upper tube 12, and the lower tube 13, and based on the needs of hydroforming, the head tube is sealed with two sealing pieces 20. One of the ends of 11 and the free end of down pipe 13 are closed;

Next, the aforementioned frame member blank 10A is placed into the mold 50, and the frame member blank 10A is expanded and formed into the frame member blank 10B as shown in FIG. The sealing and redundant parts of the frame are cut off, and after simple trimming, a vehicle frame member 10 having a head tube 11, an upper tube 12 and a lower tube 13 as shown in FIG. 5 can be manufactured.

Please refer to the third preferred embodiment shown in Fig. 7 for the implementation and use of the present utility model. through pipe 15, and can further cooperate with the assembly and connection of a rear fork D to form a complete bicycle frame; wherein, the upper pipe 12 and the lower pipe 13 of the frame member 10 are pipes that are welded and connected to the head pipe 11 at the front end On the upper and lower positions, the rear end of the upper tube 12 is welded to the tube body near the top of the seat tube 14, the bottom end of the seat tube 14 and the rear end of the down tube 13 are welded to the tube body of the bottom bracket tube 15, and The hollow pipe grooves of the pipe fittings form a connected shape, so that the pipe fittings are expanded and formed by using hydroforming technology with the mold, so that the outer surface and connection parts of the entire frame member 10 are smooth and smooth, and at the same time, the outer surface of the frame member 10 One or more three-dimensional embossed moldings 100 are formed by mold molding.

Please refer to Figs. 7 and 8, the molding method of the third preferred embodiment of the vehicle frame member 10 is to select five metal pipe fittings 11A, 12A, 13A respectively corresponding to the head pipe 11, the upper pipe 12 and the lower pipe 13, 14A, 15A, wherein the first, fourth and fifth metal pipe fittings 11A, 14A, 15A are respectively provided with a communication hole 112, 142, 152 at each connecting portion of the pipe body, and the five metal pipe fittings 11A, 15A are welded together. 12B, 13A, 14A, 15A are relatively welded and connected to form a frame member blank 10A before expansion and molding. The connecting parts of the tube 14 and the bottom bracket tube 15 and the down tube 13 and the seat tube 14 each form a welded part 30, and based on the needs of hydroforming, each is sealed with a sealing piece 20 and the redundant ports of the pipe fittings;

Next, the aforementioned frame member blank 10A is placed into the mold 50, and the frame member blank 10A is expanded and formed into a frame member blank 10B as shown in FIG. The sealing and redundant parts of the frame are cut off, and after simple trimming, a frame member 10 with a head tube 11, an upper tube 12, a down tube 13, a seat tube 14 and a bottom bracket tube 15 can be produced as shown in Figure 7 .

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in any form. Any person with ordinary knowledge in the technical field, if within the scope of the technical features mentioned in the utility model, , Equivalent embodiments made with partial changes or modifications using the technical content disclosed in the utility model, and without departing from the technical features of the utility model, all still fall within the scope of the utility model's technical features.

Claims (6)

1. A bicycle frame member, characterized in that it comprises: A tube is a hollow metal tube; More than one hollow metal pipe fittings welded and connected to the head pipe in an intersecting pattern, each metal pipe fitting and the head pipe and mutual welded parts are hydraulically expanded and molded to form a continuous surface; More than one three-dimensional embossed modeling body that protrudes from the surface of the frame member and connects the frame members into one. 2. The bicycle frame member according to claim 1, wherein the head pipe and the hollow interiors of the metal pipes are connected. 3. The frame member of a bicycle according to claim 1 or 2, characterized in that it comprises a said metal pipe part, and said metal pipe part constitutes an upper pipe whose front end intersects with said head pipe. 4. The frame member of a bicycle according to claim 1 or 2, characterized in that it comprises a said metal pipe, and said metal pipe constitutes a down tube whose front end intersects with said head tube. 5. The bicycle frame member according to claim 1 or 2, characterized in that it includes two metal pipes, and respectively constitutes an upper pipe and a lower pipe whose front ends intersect and connect with the head pipe . 6. The bicycle frame member according to claim 1 or 2, characterized in that it comprises four metal pipes, respectively forming an upper pipe and a lower pipe whose front ends intersect with the head pipe, A seat tube connected to the rear end of the upper tube, and a bottom bracket fixed transversely to the rear end of the down tube and the bottom end of the seat tube.

Images