Swing roller skate with novel manufacturing process

A swing roller skate with a novel manufacturing process, comprising:

• an aluminum insert, a panel, an anti-wear bar, a lower bearing, an upper bearing, an insert plastic wheel fork, a polyurethane wheel and an insert cap, wherein:
• the aluminum insert is formed by bending an H-shaped aluminum profile into a U-shape and obliquely drilling a row of round through holes on a front end and a rear portion of a formed insert respectively along an up-down direction;
• an oblique direction of the round through holes on the front end and the rear portion of the aluminum insert forms a forward angle of 79.5° with a horizontal portion of the U-shape;
• then the aluminum insert is injection-molded into the panel;
• the panel is form by plastic injection molding;
• a front portion of the panel forms a pole;
• an upper cross section of the pole is semi-circular, and a lower cross section of the pole is a bottom half of a flat oval;
• the pole of the panel is curved and extends upwards;
• a front end of the panel is integrally connected to a vertical front cylinder which is smaller in a top and larger in a bottom;
• a front end of the pole of the panel, which is connected to the vertical front cylinder, is match-shaped with a larger front and a smaller rear;
• the pole at the front end of the panel obliques forwards with an angle of 79.5°;
• a front top side hole and a front bottom side hole are drilled at the front end of the panel, and a front through hole is provided between the front top side hole and the front bottom side hole;
• a rear portion of the panel is a flat cylinder vertically extending upwards;
• a front half of a horizontal cross section of the flat cylinder at the rear portion of the panel is semi-circular, and a rear half of the horizontal cross section is a rear half of the flat oval;
• a top end of the flat cylinder of the panel extends backwards and is integrally connected to a vertical rear cylinder which is smaller in a top and larger in a bottom;
• the vertical rear cylinder at a rear end of the panel obliques forwards with an angle of 79.5°;
• a rear top side hole and a rear bottom side hole are drilled at the rear end of the panel, and a rear through hole is provided between the rear top side hole and the rear bottom side hole;
• a center connecting line of the front top side hole and the front bottom side hole, as well as a center connecting line of the rear top side hole and the rear bottom side hole, respectively form a forward angle of 79.5° with a circular bottom face of the panel;
• the circular bottom face is integrally connected to a middle portion of the panel between the pole and the flat cylinder;
• an oval hole is vertically drilled at two sides of a middle of the circular bottom face respectively, and an external bottom portion of the oval hole of the circular bottom face has a concave facing upwards;
• screw holes are provided at two ends of the concave, which respectively form a forward oblique with the circular bottom face of the panel with an angle of 79.5°;
• a first row of forward oblique through holes are drilled at a contacting area of the front end of the pole of the panel and the vertical front cylinder along the up-down direction, so as to correspond to the round through holes at the front end of the aluminum insert;
• a second row of forward oblique through holes are drilled at the rear portion of the circular bottom face of the panel, so as to correspond to the round through holes at the rear portion of the aluminum insert;
• a first stopper is inserted into each of the forward oblique through holes at the front end of the panel from top to bottom, and a second stopper is inserted into each of the forward oblique through holes at the rear portion of the circular bottom face of the panel from top to bottom;
• a first arc concave connecting edge is provided at a left side and a right side of a contacting area of the pole at the front end of the panel and the circular bottom face respectively, and a second arc concave connecting edge is provided at a left side and a right side of a contacting area of the flat cylinder vertically extending upwards at the rear portion of the panel and the circular bottom face respectively;
• an arc paved bevel is formed at a front side of a top portion of the flat cylinder vertically extending upwards at the rear portion of the panel;
• a left side and a right side of an upper circumference of the circular bottom face of the panel are arc-edged;
• a lower circumference of the circular bottom face of the panel is arc-edged;
• an upper circumference and a lower circumference of the oval hole of the circular bottom face of the panel are arc-edged;
• a front side, a left side and a right side of a top face of the vertical front cylinder at the front end of the panel are arc-edged;
• a rear side, a left side and a right side of a top face of the vertical rear cylinder at the rear end of the panel are arc-edged;
• a front side, a left side and a right side of a bottom face of the vertical front cylinder at the front end of the panel are arc-edged;
• a rear side, a left side and a right side of a bottom face of the vertical rear cylinder at the rear end of the panel are arc-edged;
• anti-slip grains are arranged around a top side of the oval hole of the circular bottom face of the panel, which are conical;
• the anti-wear bar is a bar-shaped nylon unit, and a connecting through hole is drilled and upwardly provided at two ends of the anti-wear bar;
• two the anti-wear bars are fixed by four screw holes at the concave of the external bottom portion of the oval hole of the panel through four self-tapping bolts;
• the lower bearing is a first deep groove ball bearing, and the upper bearing is a second deep groove ball bearing;
• two the lower bearings are respectively embedded in the front top side hole and the rear top side hole of the panel;
• the insert plastic wheel fork comprises a wheel fork insert and a plastic wheel fork;
• the wheel fork insert is formed by a metal wheel fork and a locking bolt screw barrel;
• the metal wheel fork is formed by stamping a flat metal strip into an n-shape;
• two opposite through holes with a diameter of 8 mm are drilled at side faces of two bottom ends of the metal wheel fork;
• the bottom ends of the metal wheel fork are round-cornered;
• a top portion of the metal wheel fork is welded on the locking bolt screw barrel by spot welding, which is then reinforced by argon arc welding;
• a diameter of the locking bolt screw barrel is 8 mm;
• after being welded with the metal wheel fork, an axis of the locking bolt screw barrel is 27 mm away from a connecting line of the opposite through holes of the bottom ends of the metal wheel fork;
• the metal wheel fork of the wheel fork insert is injection-molded in the plastic wheel fork, and a pole of the locking bolt screw barrel of the wheel fork insert is fully exposed outside the plastic wheel fork;
• the plastic wheel fork is connected to the wheel fork insert by injection molding, wherein a top face of a top portion of the plastic wheel fork is spherical and extends upwards, and a bottom face of the top portion of the plastic wheel fork is n-shaped;
• two sides of the plastic wheel fork extend downwards and are integrally connected to two fork pieces which are slightly wider in a top and slightly narrower in a bottom, and the fork pieces are arc faces extending outwards;
• a bottom end of the fork pieces of the plastic wheel fork is a downward semicircle whose external edge is round-cornered;
• two horizontal holes are drilled at external sides of the bottom ends of the fork pieces of the plastic wheel fork, which inwardly communicate with two horizontal through holes;
• a center connecting line of the horizontal through holes of the plastic wheel fork is perpendicular to an axis extension cord of the locking bolt screw barrel of the wheel fork insert;
• two convex rings are provided at internal ends of the horizontal through holes of the plastic wheel fork;
• the polyurethane wheel comprises two bearings at centers of both sides, and is connected to the horizontal through holes of the insert plastic wheel fork through a locking bolt;
• four shafts of the insert plastic wheel fork are inserted into four the lower bearings and four the upper bearings at the front ends and the rear ends of two the panels, and are screwed into the screw holes of the top portions of the locking bolt screw barrels by flat base bolts of four the insert caps for positioning;
• the insert cap is formed by injection-molding a plastic round cap into a top head of a flat base hex bolt;
• a round hole is drilled at a center of a top portion of the insert cap, which corresponds to and communicates with a hex hole at the top head of the flat base hex bolt;
• four the insert caps are screwed into the screw holes of four pairs of the locking bolt screw barrels, and are placed at top portions of the front top side hole and the rear top side hole of the panel.