TWM514888U - Unitary bicycle rim - Google Patents

Description

One-piece bicycle rim

The present invention relates to a bicycle rim, and more particularly to a bicycle rim that is integrally formed and has a hollow inner cross-sectional structure.

According to the prevalence of environmental awareness and leisure, the bicycles that originally belonged to non-mainstream vehicles are no longer the same. Not only must the function be considered sloppy, but even the functional considerations of folding bicycles have come out. Since the design of the shape and function has been saturated, the industry has gradually begun to focus on the design of the light weight and strength. The rims commonly used in bicycles have been improved from the early iron ring to the aluminum alloy rims that are commonly used today. The aluminum alloy rim process is nothing more than procedures such as drawing, forming, welding and surface machining. Cutting an aluminum extruded metal strip of a predetermined length, and then bending the aluminum extruded shape into a circular shape by a rounding machine, and continuing to join at both ends of the aluminum extruded metal strip by a plug to form an aluminum alloy rim Wherein, the aluminum alloy rim segment itself is drawn into a hollow space, and then hollow holes are respectively formed around the hollow space for the two ends of the plug to be respectively fixed in the hollow hole to form a complete joint. The appearance of the rim, such as the Republic of China Patent Gazette, bulletin Nos. M461548, 303816, etc. However, although the bicycle rim has been used for many years, in actual use, there are still the following defects, such as: 1, rim The concentricity is insufficient. As described in the above manufacturing process, although the strip-shaped aluminum extruded metal strip is bent into a circular shape, after the plug is connected, the actual rim is not very close to a circle, and when the bicycle is in High speed , It is prone to rattling or rotation of the ring true condition, and therefore, in order to avoid eccentricity occurs, The bicycle rim must be like a rim for a car. A lead block is placed on the rim to balance the concentricity at high speed. 2. The rim is prone to damage at the joint. When the bicycle is traveling, With the unevenness of the road surface, the bicycle will vibrate with the undulation of the road surface. Under the vibration of constant time, the bicycle rim connected by the plug will be affected by vibration, impact, etc., resulting in deformation of the plug and engagement of the bicycle rim. In the case of surface deformation, etc., even the bicycle rim joint surface, plug, etc., will be more severely deformed than other parts.

Moreover, there are still technical difficulties in the production of traditional bicycle rims, such as: 1. The higher the profile height of the frame, the greater the effect of cutting wind resistance during riding, which makes the rider more labor-saving. However, when the aluminum strip is wound by a rounding machine by a conventional manufacturing method, if the aluminum strip is too high, it is easily deformed or even rolled into a circle when processed by the rounding machine; 2. The conventional production method will The aluminum strip is wound by a rounding machine. If the diameter of the formed circle is smaller (the arc of the rounding process is larger), the more technically limited, the twisting deformation is easily caused by the rounding machine, and it is impossible to roll into a circular shape.

In view of the above-mentioned needs, this creation has been carefully researched and accumulated into many years of experience in this business, and finally designed a brand-new integrated bicycle rim.

One of the aims of this creation is to provide an integrally formed bicycle rim.

One of the aims of the present invention is to provide a bicycle rim having a hollow interior structure.

In order to achieve the above objectives, the bicycle rim formed by the creation of the creation is manufactured according to the following steps: a ring-shaped and hollow-shaped wheel frame model is formed by foaming material; the wheel frame model is pre-positioned with a plurality of openings; and a mold-coating agent is evenly coated on the inner and outer surfaces of the wheel frame model to form a hard shell model; The hard shell model is embedded in a sand box together with the wheel frame model for sanding; vibrating the sand box to vibrate the sand; the inside of the flask maintains a vacuum state and performs high temperature liquid metal casting; the liquid metal makes the wheel frame The model is vaporized to fill the interior of the hard shell model; after the liquid metal is cooled, a bicycle rim is formed in the hard shell model; the bicycle rim is coated with the hard shell model from the sand box; The hard shell model of the surface of the bicycle rim is removed; a bicycle rim that is hollow and integrally formed in a cross-sectional structure is completed.

In a preferred embodiment of the present invention, the method further includes the steps of: forming the same metal piece as the openings; the metal pieces fill the openings; in the above step, the metal pieces are closely closed (close The method of fit is forced into the openings, and the gap remaining between the metal piece and the opening is filled by welding.

In a preferred embodiment of the present invention, the bicycle rim is heated to increase the strength, hardness and fatigue resistance of the metal, and to strengthen the toughness of the metal; and the bicycle rim is processed by a lathe milling machine. The finished wheel frame.

In a preferred embodiment of the present invention, the wheel frame model includes two first shell members and a second shell member bonded to each other, and the inner ring of the annular wheel frame model is provided with a plurality of fins.

In a preferred embodiment of the present invention, wherein the top of the flask is formed with an opening, the bottom An air suction port is provided, and when the sand box is vibrated, the top opening of the sand box is covered with a plastic mold, and the inside of the sand box is evacuated by the air suction port.

1‧‧‧ wheel frame model

10‧‧‧ hollow area

11‧‧‧First shell

12‧‧‧Second shell

13‧‧‧ Ribs

14‧‧‧ Inner Ring

15‧‧‧Opening

2‧‧‧hard shell model

3‧‧‧ sand box

31‧‧‧ openings

32‧‧‧Exhaust port

33‧‧‧Plastic film

34‧‧‧ sand

4‧‧‧Liquid metal

5‧‧‧Bicycle rims

6‧‧‧metal pieces

Figure 1 is a flow chart of a preferred embodiment of the present invention.

Figure 2 is a cross-sectional view of a preferred embodiment of the present invention.

Fig. 2A is a schematic perspective view of a portion of Fig. 2A.

Figure 2B is a schematic cross-sectional view of a portion of Figure 2B.

Fig. 3A is a cross-sectional view 2 of the preferred embodiment of the present invention.

Fig. 3B is a partial perspective cross-sectional view of Fig. 3A.

Figure 4 is a cross-sectional view III of a preferred embodiment of the present invention.

Figure 5 is a cross-sectional view of a preferred embodiment of the present invention.

Figure 6 is a flow chart 2 of a preferred embodiment of the present invention.

Figure 7 is a side elevational view of a preferred embodiment of the present invention.

Fig. 8 is a partial perspective cross-sectional view after the processing of Fig. 7.

In order for your review board to have a clear understanding of the content of this creation, please refer to the following description only. Please refer to FIG. 1 , which is a flow chart of a preferred embodiment of the present invention. When the bicycle rim is integrally formed and has an internal cross-sectional structure, the following steps are taken: (100) made of foamed material a ring-shaped and internally hollow wheel frame model; (101) the wheel frame model is pre-positioned with a plurality of openings; when the above steps are performed, please also refer to Figures 2, 2A and 2B, first made of foamed material Into the wheel frame model 1. When the wheel frame model 1 is manufactured, two corresponding ones of the first shell member 11 and one second shell member 12 are respectively formed, and the shell members 11 and 12 are annular and have a concave shape inside, It is advantageous to explain the internal structure, so it is described in a sectional view. Since the shell members 11, 12 are annular, it can be clearly seen from the figure that the upper and lower halves of the shells 11 and 12 are formed. All of the shell members 11 and 12 are respectively provided with a plurality of corresponding ribs 13 respectively. Then, when the shell members 11 and 12 are bonded to each other, the shell members 11 and 12 are internally recessed. The region forms a hollow region 10, and the interior of the wheel frame model 1 is in a hollow state. In addition, the ribs 13 are formed at the position of the inner ring 14 of the wheel frame model 1; it should be noted that in order to facilitate the latter description In the processing of the step, the wheel frame model 1 is provided with a plurality of openings 15 . In the embodiment, although the openings 15 are simultaneously disposed on the side and top surfaces of the wheel frame model 1 , the openings 15 are In actual production, the openings 15 may be separately set to the wheel frame module according to actual production requirements. 1, side or top.

(102) uniformly coating the inner and outer surfaces of the wheel frame model with a mold-coating agent to form a hard shell model; when the above steps are performed, please refer to the drawings 3A and 3B at the same time, and the mold-coating agent is evenly coated on the inside and outside of the wheel frame model 1 On the surface, during coating, the mold can be uniformly applied to the wheel frame model 1 by dipping or spraying or smearing, followed by baking in a hot air of 50 to 60 degrees C until the molding agent is completely dried. Thereafter, the molding agent forms the hard shell model 2 on the inner and outer surfaces of the wheel frame model 1, and the coating agent is mostly a water-soluble material in order to facilitate processing such as painting and subsequent removal.

(103) embedding the hard shell model together with the wheel frame model in a sand box for sanding; (104) vibrating the sand box to vibrate the sand; (105) maintaining a vacuum inside the sand box and performing a high temperature liquid state Metal casting; (106) liquid metal vaporizes the wheel frame model to fill the interior of the hard shell model; please refer to Figures 3A to 5, the sand box 3 is formed with an opening 31 at the top and a bottom portion Pump The gas port 32, when the above steps are performed, after the inner and outer surfaces of the wheel frame model 1 are lined with the hard shell model 2, the wheel frame model 1 is placed inside the sand box 3, and then the molding sand 34 is poured into the sand box 3, Until the molding sand 34 completely covers the wheel frame model 1, since the wheel frame model 1 is provided with the opening 15, the molding sand 34 enters the hollow region 10 in the wheel frame model 1 through the opening 15, and continues to vibrate The sand box 3 makes the distribution of the molding sand 34 more uniform, and then covers the opening 31 of the flask 3 with the plastic film 33, and vacuums at the suction port 32, so that the molding sand 34 can be tightly attracted by the suction of the vacuum pressure. The wheel frame model 1 is covered, and the inside of the hollow region 10 is completely and tightly filled by the molding sand 34; then, the liquid metal 4 is injected into the hard shell model 2, since the wheel frame model 1 is made of a foamed material The foaming material is made of plastic material, such as styrofoam. Therefore, after the high temperature liquid metal 4 contacts the wheel frame model 1, the wheel frame model 1 will be burned or gasified or thermally cracked, and continuously cast until The liquid metal 4 completely fills the hard shell model 2.

(107) forming a bicycle rim in the hard shell model after cooling the liquid metal; (108) removing the bicycle rim covered by the hard shell model from the sand box; (109) the bicycle rim The hard shell model of the surface is removed; (110) a bicycle rim having a hollow and integrally formed ring shape having a cross-sectional structure is completed. When the above steps are carried out, please refer to Figures 4 and 5, after the liquid metal 4 in the hard shell model 2 is cooled, the hard shell model 2 can be taken out from the sand box 3, at this time, in the hard shell The cooled liquid metal 4 in the model 2 forms the bicycle rim 5, and then the hard shell model 2 on the bicycle rim 5 is removed to complete the bicycle rim 5 of the present invention.

Please refer to FIG. 6 , which is a flow chart 2 of the preferred embodiment of the present invention. After the bicycle rim 5 is completed according to the flow of the above FIG. 1 , in order to further strengthen the structure of the bicycle rim 5 , Follow the steps below: (200) making the same piece of metal as the openings; (201) the metal sheets fill the openings of the bicycle rim; (202) the bicycle rim is processed by heat treatment, lathe, milling machine to manufacture the wheel frame; when the above steps are performed, firstly, In the flow of Fig. 1, the wheel frame model 1 is provided with the opening 15 for the purpose of drenching sand, and the rib 13 is provided for avoiding deformation of the wheel frame model 1 made of a foam material. For the description of the hole 15 and the rib 13 , please refer to the paragraph of FIG. 1 above. Therefore, the hard shell model 2 also retains the opening 15 and the rib 13 , and the bicycle rim 5 is completed after casting. Similarly, the opening 15 and the rib 13 are formed. At this time, a metal piece 6 having the same size, thickness and curvature as the opening 15 is first formed, and the metal piece 6 is forced in a close fit manner. And entering the opening 15 and then filling the gap remaining between the metal piece 6 and the opening 15 by welding, and then performing heat treatment to improve the metal characteristics of the bicycle rim 5, such as the strength and hardness of the metal. And anti-fatigue properties, as well as strengthening metal toughness, etc.; continue to remove such The rib 13 makes the bicycle rim 5 a complete circular shape. Finally, the bicycle rim 5 is made into a wheel frame by moving through a lathe or a washing machine for processing, such as polishing.

As described in the prior art, the rim currently used for bicycles is not integrally formed, and therefore, the bicycle rim 5 integrally formed can be produced by the process of the present invention, and the bicycle rim 5 has more than the prior art. The utility model has the advantages that the integrally formed structure can have better steel property than the prior art docking manner, and can withstand vibration and pressure from the road surface when the bicycle is running, and the bicycle rim 5 The one-piece forming method is made closer to the true round shape, has good roundness and can uniformly disperse the shock and pressure, and at the same time, compared with the prior art, the creation has the following advantages: The higher the profile height of the wheel frame, the greater the effect of cutting the wind resistance during riding, and the more labor-saving the rider, but the traditional method of processing the aluminum strip through the rounding machine when the circle is rounded, if the frame height is too high Aluminum strip When machining, it is easy to cause distortion and even roll. The method of this creation can easily overcome this difficulty without making a roll, and make a high-frame hollow wheel frame. 2. The aluminum strip is passed through the traditional production method. The rounding machine processes the coil circle. If the diameter of the formed circle is smaller (the arc of the coiling process is larger), the more technical limitation, the twisting deformation is easily caused by the coiling machine, and even the coil cannot be rolled into a circular shape. You can easily overcome this difficulty without making a roll, and make a wheel frame of smaller diameter.

The above descriptions are only for the preferred embodiment of the present invention and are not intended to limit the scope of the present invention; any person skilled in the art can make equal changes and modifications without departing from the spirit and scope of the present invention. , should be covered by the scope of this creation patent.

To sum up, the bicycle rim formed by one of the creations has the patented creativity and the value of the use of the industry; the applicant filed an application for the creation of a patent to the shackle in accordance with the provisions of the Patent Law.

5‧‧‧Bicycle rims

10‧‧‧ hollow area

Claims (10)

An integrally formed bicycle rim is a ring-shaped model with a foamed material and a hollow interior. The wheel frame model is pre-positioned with a plurality of openings, and the coating agent is evenly coated on the wheel. A hard shell model is formed on the inner and outer surfaces of the frame model, and the hard shell model is embedded in a sand box together with the wheel frame model for sanding, vibrating the sand box to shake the sand, and the inside of the flask maintains a vacuum state and performs high temperature. The liquid metal is cast, and the liquid metal vaporizes the wheel frame model to fill the inside of the hard shell model. After the liquid metal is cooled, a bicycle rim is formed in the hard shell model, and the hardened surface is covered with the hard The bicycle rim of the shell model removes the hard shell model of the bicycle rim surface, wherein the bicycle rim is an annular body, the internal cross-sectional structure is hollow, and the overall structure is integrally formed. A bicycle rim according to any one of the preceding claims, wherein the wheel frame model comprises two first shell members and a second shell member bonded to each other. A bicycle rim formed by one of the inventions of claim 1, wherein the inner ring of the annular wheel frame model is provided with a plurality of ribs. A bicycle rim according to any one of the preceding claims, wherein the top of the flask is formed with an opening, and the bottom portion is provided with an air suction port. A bicycle rim formed by one of the inventions of claim 4, wherein the opening of the top of the flask is covered with a plastic film when the flask is vibrated. The bicycle rim according to any one of the preceding claims, wherein the hard shell model is embedded in the sand box together with the wheel frame model for sanding, and the molding sand fills the wheel frame by the openings The hollow part of the model. A bicycle rim according to any one of the preceding claims, further comprising: forming a metal sheet identical to the openings, the metal sheets filling the openings of the bicycle rim. The bicycle rim formed by one of the inventions in claim 7 , wherein the metal sheets are forced into the openings in a close fit manner, and are filled in the metal sheet by welding. The gap between the openings. The scope of the patent application of paragraph 1 or one item of the molded bicycle rim 7, wherein the bicycle rim further heat treatment to increase metal strength, hardness and anti-fatigue properties, and ductile reinforced metallic material. The bicycle rim according to any one of the inventions of claim 9 , wherein the bicycle rim is processed by a lathe and a milling machine to produce a finished wheel frame.