TWI381971B - Bicycle frame - Google Patents

Description

Bicycle frame

The present disclosure is directed to a bicycle device and, more particularly, to a bicycle frame having a venting opening.

The role of bicycles in today's life is becoming more and more important, whether it is to save money, exercise or save energy and carbon, etc., more and more people use bicycles instead of steam locomotives.

The air resistance of the bicycle as it travels is proportional to the effective windward area, the square of the forward speed, and the drag coefficient. Therefore, when the effective windward area is doubled, the resistance will be doubled; while the drag coefficient is doubled, the resistance will be doubled; but when the speed is doubled, the resistance will increase by 3 times and become 4 times the original. . It can be seen that when the bicycle is passing through a high-rise building or needs to turn sideways, it is easy to increase the air resistance of the bicycle due to factors such as the effective windward area and speed, and the bicycle itself has no good wind guiding structure. Bicycles are susceptible to air resistance and deviate from the original track.

Accordingly, it is a technical aspect of the present disclosure to provide a bicycle frame for overcoming the problem that the bicycle frame does not have a good wind guiding structure.

In accordance with an embodiment of the present disclosure, a bicycle frame includes at least one axle and at least a consistent aperture. The through hole runs through the pole along the lateral direction of the pole.

In accordance with another embodiment of the present disclosure, a bicycle frame includes at least one axle and at least a consistent aperture. The through holes penetrate the opposite sides of the pole.

Therefore, the bicycle frame of the present disclosure has a plurality of through holes in the vehicle pole, so that the bicycle has a good wind guiding structure, thereby reducing the lateral wind resistance of the bicycle user.

FIG. 1 is a perspective view of a bicycle frame according to an embodiment of the present disclosure. As shown, the bicycle frame 100 includes at least one axle 110 and at least a consistent aperture 120. The bicycle frame 100 of the present embodiment has a plurality of through holes 120 in the vehicle pole 110, thereby reducing the lateral wind receiving surface and achieving the ventilation effect.

The lever 110 is a basic unit constituting the bicycle frame 100. Today, the rod 110 has various materials, and common metal alloys such as chrome molybdenum steel, aluminum alloy, titanium alloy, and the like. In addition, carbon fiber can also be used as the material of the vehicle body 110.

The characteristics of the various materials are briefly described below. The frame of chrome-molybdenum steel is the oldest frame, so it has the longest research time. The chrome-molybdenum steel pipe has excellent shock absorption performance, and the chrome-molybdenum steel is easier to weld than titanium and aluminum, and can be designed as a famous species. shape. In addition, chrome-molybdenum steel does not require heat treatment after welding, and does not require large heat treatment equipment, so the cost is low and the relative price is relatively low. However, if the surface of chrome-molybdenum steel is not treated, it will rust easily if there is a wound, and the thickness of the pipe will be thin, and the effect of rust will be very large. Furthermore, the metal fatigue of chrome-molybdenum steel is remarkable (metal fatigue caused by stress concentration), and the structural strength of the frame may not be maintained.

Aluminum is light in weight but not hard enough, so in order to increase strength, it is necessary to carry out Heat treatment. Aluminum alloys are commonly used to make lightweight frames, but the strength and Young's modulus of the aluminum alloy itself are low, so the pipe diameter must be increased to increase rigidity. In addition, aluminum itself is a metal that is easily corroded. There is almost no aluminum that is not oxidized in the air. It is immediately oxidized into a very thin oxide film when placed in the air. When the thickness of the oxide film reaches a certain level, Prevent aluminum from continuing to rust. Therefore, when riding a bicycle made of aluminum alloy, the more the number of uses, the higher the number of stresses, and the significant change in strength.

Although the strength of pure titanium metal is high, in order to facilitate design and increase elasticity, aluminum and vanadium are added to titanium to make a lightweight and strong frame. Titanium is hardly corroded under normal conditions, but titanium has another corrosion phenomenon, ie, dissimilar metal corrosion, which must be insulated with grease. In addition, titanium is also used on the spring of the shock absorber. Because of the good riding feel, the frame made of titanium is suitable for long-time riding. However, titanium exists in the form of titanium dioxide in nature. The refining and processing process is complicated, the technical requirements are high, the time and cost are relatively high, and the welding of titanium must be carried out in an air-insulated environment. For various reasons, the price of the titanium frame is quite expensive.

The carbon fiber frame is a frame in which the carbon fibers are stacked in a direction in which stress is generated to form a structural strength. In addition, the carbon fiber frame is very light and has good impact absorption. It can be made into a bicycle without a shock absorber by utilizing the carbon fiber to absorb the excellent impact performance. The basic molding method of carbon fiber is to lay a fiber sheet on a mold and then flow into the resin and burn it, so that it can be made into frames of various shapes. However, although the carbon fiber frame has a strong tensile strength, its strength to withstand shear stress is weak, and complicated stress calculation is required for processing. Sex, transverse rigidity), and carbon fiber sheets are overmolded according to calculations.

The through holes 120 extend through the lever 110 along the lateral direction of the lever 110. In other words, the through holes 120 extend through opposite sides of the lever 110. The purpose of opening the through hole 120 is to pass the lateral airflow, thereby reducing the lateral wind resistance, and the same as the large curtain panel on the street, and opening the vent hole on the windward side. In addition, the number of cross holes 120 and the size of the cross-sectional area can be designed in accordance with the calculation of the lateral wind resistance. In addition, since the plurality of through holes 120 are formed in the vehicle pole 110, the weight of the bicycle frame 100 is lighter than that of the conventional bicycle frame, which not only reduces the load on the user but also saves material costs.

In addition, the embodiment further includes at least one plug member 130. The plug member 130 plugs the through hole 120. The plug member 130 has a vent hole 131 extending through the plug member along the axial direction thereof, and the axial direction of the vent hole 131 is The axial direction of the through holes 120 is substantially parallel. The use of the plug member 130 to plug the respective through holes 120 has the effect of preventing rainwater from penetrating into the bicycle frame 100 and increasing the structural strength of the bicycle frame 100.

Fig. 2 is a perspective view showing the plug of the bicycle frame of Fig. 1. As shown, the two side edges 132 of the plug member 130 are protruded. When the plug member 130 is plugged into the through hole 120, the protrusions of the side edges 132 are in close contact with the outer edge of the through hole 120, thereby preventing foreign matter from entering the handlebar 110. Inside. Although the cross section of the plug member 130 in the present embodiment is an elliptical ring, the plug member 130 can change its cross-sectional shape, such as a ring, according to actual needs.

It is worth mentioning that the plugs 130 using different materials can have different effects. In this respect, it can be judged according to the material characteristics of the above-mentioned vehicle 110, and it is necessary to strengthen the rust prevention or strengthen the structural strength to carry out the plugging. The selection of piece 130. If it is desired to strengthen the prevention of rust, a rubber plug member may be selected, and the rubber plug member is closely adhered to the outer edge of the through hole 120 to prevent foreign matter from entering. Moreover, the rainwater can be prevented from entering the inside of the vehicle pole 110, and the waterproof effect is achieved, thereby protecting the vehicle pole 110 from rust. If the structural strength is to be used, a material similar to the material of the vehicle bar 110 such as a metal alloy or carbon fiber may be used as the plug member 130. Thus, the plug member 130 not only prevents foreign matter from entering, but also strengthens the structure supporting the entire bicycle frame 100. .

Fig. 3 is a structural view showing the bicycle frame mounting fitting of Fig. 1. As shown in the figure, the through hole 120 formed in the lever 110 is not only used for ventilation after the plug 130 is inserted, but also can be installed on each plug 130 according to the needs of the user, such as the kettle 140. The lamp 150 and the like can be mounted on the plug member 130 by means of a quick release device, so as to disassemble the accessory according to different requirements.

It can be seen from the above embodiments of the present disclosure that the bicycle frame 100 to which the present disclosure is applied has a plurality of through holes 120 in the vehicle pole 110, so that the bicycle has a good air guiding structure and reduces the lateral wind resistance of the bicycle user. The opening of the through hole 120 reduces the weight of the bicycle frame 100 itself, and the weight required by the user is relatively reduced. On the other hand, the plug hole 130 is used to plug the through hole 120, which not only reduces the penetration of rainwater into the axle 110, but also increases the structural strength of the bicycle frame 100. The quick release type fitting can be closer to the user. demand.

The present disclosure has been disclosed in an embodiment of the present invention, and is not intended to limit the disclosure, and various modifications and refinements may be made without departing from the spirit and scope of the present disclosure. The scope of the disclosure is defined by the scope of the appended claims.

100‧‧‧Bicycle rack

110‧‧‧Cars

120‧‧‧through holes

130‧‧‧plugs

131‧‧‧ventilation holes

132‧‧‧ both sides

140‧‧‧ Kettle

150‧‧‧ headlights

FIG. 1 is a perspective view of a bicycle frame according to an embodiment of the present disclosure.

Fig. 2 is a perspective view showing the plug of Fig. 1.

Figure 3 is a perspective view of the bicycle frame mounting accessory of Figure 1.

100‧‧‧Bicycle rack

110‧‧‧Cars

120‧‧‧through holes

130‧‧‧plugs

Claims (10)

A bicycle frame comprising: at least one vehicle pole; at least a uniform hole extending laterally along the vehicle pole; and at least one plug member plugging the through hole, wherein the plug member has a ventilation hole along the The plug is axially penetrated. The bicycle frame according to claim 1, wherein the plug is made of a metal alloy. The bicycle frame of claim 1, wherein the plug is made of carbon fiber. The bicycle frame according to claim 1, wherein the plug is made of rubber. The bicycle frame of claim 1, wherein the two sides of the plug protrude and are watertight to the outer edge of the through hole. A bicycle frame comprising: at least one vehicle pole; at least a constant hole extending through opposite sides of the vehicle pole; and at least one plug member plugging the through hole, wherein the plug member has a ventilation hole therethrough, and the ventilation The axial direction of the hole is substantially parallel to the axial direction of the through hole. The bicycle frame according to claim 6, wherein the plug is made of a metal alloy. The bicycle frame of claim 6, wherein the plug is made of carbon fiber. The bicycle frame of claim 6, wherein the plug is made of rubber. The bicycle frame according to claim 6, wherein the two sides of the plug protrude and are watertight to the outer edge of the through hole.