Abstract: The present invention discloses a device for removal of wheel rim burr which comprises a main body, plural positioning wheels, an eccentric wheel disposed on the main body, and at least two brush wheels disposed between two corresponding positioning wheels.

Abstract: The present invention discloses a scrap removing device for cutting a wheel rim which comprises a main body having a working surface, a wheel rim positioning member, a first blowing member and a second blowing member sequentially disposed on the working surface from a top side thereof.

Abstract: A method for manufacturing a bicycle crank is revealed. After being extended, bent and forged, an aluminum alloy pipe becomes an L-shaped part formed by a cylindrical crankshaft portion and an oval crank portion integrally connected to each other. A plug is inserted into an outer end of the crank portion while a periphery of an outer end of the crankshaft portion is punched to form a shaft-connecting portion. An assembling hole is arranged at the outer end of the crank portion, corresponding to the plug. Thus a bicycle crank is produced. Thereby not only the assembly of the bicycle crank is easier and more convenient, the structural strength of the bicycle crank is increased effectively to against vibrations and impacts. The bicycle is lightweight and the bicycle crank is more streamlined so that consumers are attracted. Thereby the market competitiveness is increased.

Abstract: A structure of a bicycle wheel rim is disclosed. It comprises an inner rim frame and a composite rim body. The inner rim frame is provided with an inner rim part, two lateral ring parts respectively disposed on both sides of the inner rim part, two hooks respectively disposed on terminals of the two lateral ring parts, and an opening formed between the two hooks and having a supporting part. The composite rim body encapsulates the inner rim part, the two lateral rings and the two hooks.

Abstract: A wheel securing structure for trucks is provided. The securing structure generally includes iron screwshaft liners installed in keyholes of mounting parts of aluminum wheels. The bolts of an assembling part correspondingly penetrate the holes of respective screwshaft liners. A first folded edge and a second folded edge are formed on two terminals of each screwshaft liner to respectively insert into conical pits formed on the mounting part of a wheel. The nuts screw onto the bolts of the assembling part to secure the wheel onto the assembling part. When the trucks pass bumpy roads, relative motion caused by vibrations occurs between the wheels and the assembling part, and friction is generated between various parts. The screwshaft liner protects the soft aluminum wheel from being directly rubbed by the bolts, nuts, and the assembling part. Accordingly, the aluminum wheel is made suitable for trucks and other heavy vehicles.

Abstract: A reinforcing structure of a carbon fiber rim is provided. A rim body is made from a carbon fiber material. The rim body includes an external diameter edge to be assembled with a tire, an inner diameter edge to be assembled to a hub via spokes, and two side sections between the outer diameter edge and the inner diameter edge. Metal reinforcing sheets are respectively disposed on the spoke assembling positions of the inner diameter edge and wrapped by the carbon fiber material, and each reinforcing sheet has two opening edges and a middle ring section connecting the two opening edges. The middle ring section is disposed with a reinforcing part corresponding to the inner diameter edge of the rim body and two reinforcing edge parts corresponding to two side edge sections.

Abstract: A manufacturing method and structure of a carbon fiber rim is revealed. A metal strip is formed by heating a metal substrate to a moldable temperature and then extruded molding. The metal strip comprises two side walls, a connecting wall and an inner rim wall to form a space surrounded by the side walls, the connecting wall, and the inner rim wall. Next, two terminals of the strip are connected to form a circle as a rim frame's embryo. The two side walls, or the two side walls and the inner rim wall of the rim frame's embryo are milled to form plural through holes and become a rim frame. Afterwards, the surface of the rim frame is roughened and covered with a trimmed carbon fiber cloth having a predetermined shape. After heatsetting and surface treating, a carbon fiber rim having a light weight and a strong structure is obtained.

Abstract: A method for manufacturing a bicycle front fork having a wheel clamping base. The method includes the steps of extruding an aluminum alloy substrate having three rectangular bars, wherein the two of the rectangular bars have assembling segments; cutting the substrate for a blank and placing it into a mold for forging the three rectangular bars into three round bars; placing the blank into another mold for extruding and punching the three round bars to have guide holes; drilling the round bars along the guide holes to form three round tubes; flattening and shrinking openings of two of the three round tubes; molding the assembling segments; downwardly bending the two round tubes having the assembling segments into two fork tubes of a bicycle front fork; punching the assembling segments into locking connection portions for a clamping base of the bicycle front fork.

Abstract: A method for manufacturing an integrated aluminum alloy bicycle front fork is revealed. Aluminum alloy is extruded to form substrate having three rectangular bars. Cut the substrate to get a blank. The blank is set into a mold for forging the three rectangular bars into three round bars. Then burr and waste material are removed. Next the blank is set into another mold for extruding the three round bars and the three round bars are punched to have guide holes. The round bars are drilled along the guide holes and penetrated to form round tubes. A tube opening of two round tubes is flattened and narrowed. Then the two round tubes are bent downward to form fork tubes of a front fork. The rest tube forms a front fork stem. Thereby an integrated light weighted front fork with good structural strength and beautiful appearance is produced.

Abstract: A method for manufacturing an integrated aluminum alloy bicycle front fork is revealed. Aluminum alloy is extruded to form substrate having three rectangular bars. Cut the substrate to get a blank. The blank is set into a mold for forging the three rectangular bars into three round bars. Then burr and waste material are removed. Next the blank is set into another mold for extruding the three round bars and the three round bars are punched to have guide holes. The round bars are drilled along the guide holes and penetrated to form round tubes. A tube opening of two round tubes is flattened and narrowed. Then the two round tubes are bent downward to form fork tubes of a front fork. The rest tube forms a front fork stem. Thereby an integrated light weighted front fork with good structural strength and beautiful appearance is produced.

Abstract: A bicycle wheel rim adapted for mounting with a pair of tire rim portions of a tire includes a base portion and a pair of annular flanges. The base portion has an inner ring wall, and an outer ring wall surrounding the inner ring wall. Each annular flange has an inclined inner surface adapted for abutting against a corresponding one of the tire rim portions. The outer ring wall is disposed between the annular flanges, and includes a pair of connection sections, each of which is connected to a corresponding one of the annular flanges and has a retaining surface that cooperates with the inclined inner surface of the corresponding annular flange to form an included angle smaller than 90 degrees.

Abstract: A bicycle wheel rim for mounting with two tire rim portions of a tire includes an outer ring wall surrounding a rotation axis of the wheel rim, and two annular flanges. Each annular flange has an inclined inner surface for abutting against a respective one of the tire rim portions. The outer ring wall has two retaining surfaces, each extending from the corresponding one of the annular flanges toward the central radial plane of the wheel rim and being inclined radially and outwardly with respect to the rotation axis. Each retaining surface and a corresponding inclined inner surface cooperatively form therebetween an included angle smaller than 90 degrees, and clamp the respective one of the tire rim portions.

Abstract: A wheel rim includes an annular rim body having a horizontally disposed rim axis. The rim body includes an annular base wall and opposite annular side walls extending from the annular base wall. Each annular side wall includes a reinforcing segment connected to the annular base wall, and a tire coupling segment extending from the reinforcing segment. The tire coupling segments of the annular side walls cooperatively define a tire retaining space. Each reinforcing segment has an inner wall portion, an outer wall portion disposed at a radially outer side of the inner wall portion and cooperating with the inner wall portion to define an annular chamber, and at least one connecting wall portion disposed in the annular chamber, and cooperating with the inner and outer wall portions to form at least one H-shaped wall structure and to configure the annular chamber into at least two annular holes.

Abstract: A wheel rim includes an annular rim body that has an annular base wall, a pair of annular side walls, and a stop unit. The annular side walls extend respectively from lateral edges of the annular base wall. Each annular side wall includes a hollow segment and a connecting segment that interconnects the hollow segment and the annular base wall. Each hollow segment has an inner wall portion, an outer wall portion, and a tire bead retaining part projecting from the inner wall portion toward the other one of the annular side walls. Each inner wall portion is adapted for contacting a respective one of tire beads of a tire and cooperates with the stop unit and the respective tire bead retaining part to retain the respective tire bead.

Abstract: A wheel rim includes an annular rim body having a horizontally disposed rim axis. The rim body includes an annular base wall, and a pair of opposite annular side walls. The annular base wall is formed with a plurality of spoke fastening holes spaced apart from each other, and has two opposite lateral edges. The annular side walls extend radially, outwardly and respectively from the lateral edges of the annular base wall. Each of the annular side walls includes a hollow segment that defines an annular hole. The hollow segment has an inner wall portion disposed at an inner side of the annular hole and facing the other one of the annular side walls, and an outer wall portion connected to the inner wall portion and disposed at an outer side of the annular hole opposite to the inner side of the annular hole.

Abstract: A bicycle wheel rim includes an annular rim body having a rim axis and including left and right annular side walls, two annular first oblique walls, two annular second oblique walls, an annular base wall that interconnects the second oblique walls, and left and right annular connecting walls. Each first oblique wall extends from a respective side wall and has an edge opposite to the respective side wall. The edges of the first oblique walls are disposed on an imaginary cylindrical plane. Each second oblique wall extends from a respective first oblique wall. Each connecting wall extends from the base wall to a respective side wall. Each first oblique wall has a radial inner side forming an angle with the imaginary cylindrical plane that ranges from 15 to 65 degrees.

Abstract: A wheel rim includes an annular rim body having a horizontally disposed rim axis and an imaginary central plane that is perpendicular to the rim axis. The rim body includes a pair of annular side walls, an annular base wall, a pair of annular strengthening walls, and an annular reinforcing wall. The annular side walls are disposed respectively on opposite sides of the imaginary central plane. The annular base wall interconnects the annular side walls. Each of the annular strengthening walls extends from a respective one of the annular side walls toward the imaginary central plane and is disposed radially outward relative to the annular base wall. The reinforcing wall includes a pair of connecting segments, each of which interconnects the annular base wall and a respective one of the annular strengthening walls, and a reinforcing protruding segment that protrudes radially and outwardly relative to the rim axis.