Its structure Design of the utility model inflatable axle is stopped fully and has been taken off tradition this reads pattern, adopts the metal crimp product piece that expands to increase the piece bottom area of thrust surface that expand, and has promptly strengthened the swelling force of bloated piece; Adopt self-locking type tightening device and circular cone type end socket device to make that mechanical connection is more reasonable, reliable, sealing property is good, and easy to maintenance.Later-model inflatable axle adopts aluminum alloy materials on cylindrical shell, make the inflatable axle seem more slim and graceful, attractive in appearance, practical.Its structure, profile are as shown in the figure.The inflatable axle by the flat shoulder of high strength screw 1, charging check valve 2, inflation spindle nose 3, metal cylinder 4, tighten up dish 5, collar 6, nylon joint 7, bushing pipe 8, rubber swelling pipe 9, expand piece 10, nylon silently 11, chuck 12, capping 13, packing ring 14, nut 15, spacer 16 and spindle nose 17 form.
Metal cylinder 4 is bodies of inflatable axle, and it comes down to a mach metal tube of process, and its length and diameter are decided according to purposes.Its surface is processed to the regular long waist shaped hole that is quincunx distribution, and in order to place the piece 10 that expands, the length direction in long waist shaped hole is consistent with the axial direction of metal cylinder 4; Free-running fit is made in long waist shaped hole and long waist shaped hole that the piece 10 that expands is positioned on the metal cylinder 4, has only two mobilities up and down.The piece 10 that expands is bar blocks that are boss two ends band half arc, its cross-sectional plane is like " protruding " shape, thick and the bottom of its end book platform is made into circular arc, the curvature diameter of circular arc is greater than the external diameter of rubber swelling pipe 9 internal diameter less than metal cylinder 4, its circular-arc bottom face is amassed greater than about 3 times of itself long waist shaped sectional area, its purpose is used to increase the contact surface with adjacent component rubber swelling pipe 9, to improve the swelling force of the piece 10 that expands; The bloated in addition axial two ends of piece 10 end faces have chamfering, and its effect is in order to allow bloated piece 10 successfully slip in the socket in actual use.Rubber swelling pipe 9 is a kind of inflatable pipes, has the characteristic that the inflation venting is restored, being positioned at metal cylinder 4 chambeies contacts with bloated piece 10 bottoms, the one end is inserted in the circular conical surface of inflation spindle nose 3, the female cone bread that the other end is containing its outer end of circular conical surface capped 13 of chuck 12 is holding, and the configuration of its outside dimension should be satisfied: the difference of the external diameter of the internal diameter of metal cylinder 4 and rubber swelling pipe 9 equals 2 times bloated piece 10 bottom thickness and adds 2 times bloated piece 10 up and down degree.The two ends of metal cylinder 4 are equipped with inflation spindle nose 3 and spindle nose 17 separately.Inflation spindle nose 3 can charge and discharge gas as the term suggests be that a kind of cylindrical spindle nose that has charging check valve 2 is connected with tapered thread with charging check valve 2 and inner with it inner chamber communicates; Its inboard and metal cylinder 4 are made interference fit, and be fixing with the flat shoulder of high strength screw 1, in case the slippage between them; There is the center shaft that constitutes the inflatable axle with the side shaft of spindle nose 17 jointly in its outside with the side shaft form.The shape of spindle nose 17, function and matching requirements and inflation spindle nose 3 basically identicals, its inner inner chamber and spacer 16 are made free-running fit.The inner of inflation spindle nose 3 is processed to have externally threaded circular conical surface and accompanies collar 6 with tightening up dish 5 with in the middle of being threaded, and forms a tightening device; The circular conical surface top diameter of inflation spindle nose 3 is consistent with the internal diameter of rubber swelling pipe 9; Tightening up dish 5 is lassos that have negative thread and interior shoulder, and its external diameter is less than metal cylinder 4 internal diameters, and its interior shoulder place internal diameter is slightly larger than the external diameter of rubber swelling pipe 9.Collar 6 is circular boop kinks that have a female cone face in tightening up among dish 5 inner chambers.The little head end of collar 6 female cone faces with tighten up dish 5 interior shoulder with plane contact, its internal diameter just is inserted in the external diameter of rubber swelling pipe 9.Tighten and tighten up dish 5 and can make and tighten up dish 5 omoplate and produce axial thrust, promote collar 6 and be subjected to tightly, thereby make the female cone face of collar 6 closely tighten an end of rubber swelling pipe 9 with the male cone (strobilus masculinus) face of inflating spindle nose 3.Similarly chuck 12, capping 13, packing ring 14 and nut 15 are formed a circular cone type end socket device; Chuck 12 is circular cone dishes that have screw rod, and the stub end of circular cone dish is shaped on counterbore, and the diameter of major part just equals the internal diameter of rubber swelling pipe 9, and its screw rod kink is in the hole of capping 13 and packing ring 14.Capping 13 is end caps that have the female cone face, and its female cone face major part internal diameter is slightly less than 2 to 4 millimeters of the external diameters of rubber swelling pipe 9.Fastening nut 15 produces a thrust on the end face of capping 13, make chuck 12 relative displacemenies, thereby makes the male cone (strobilus masculinus) face of chuck 12 and the female cone face of capping 13 tighten rubber swelling pipe 9 other ends reliably.Spacer 16 is discs, and its center screw and chuck 12 are to be threaded.Bushing pipe 8 is metal book pipes, and its external diameter equals the internal diameter of rubber swelling pipe 9, is used for lining and goes into rubber swelling pipe 9 inner chambers, and its effect is in order to keep out the tenesmus of the piece 10 that expands, in case the piece 10 that expands skids off the long waist shaped hole; On its tube wall, be furnished with the windstream through hole.Nylon joint 7 and nylon silently 11 is equipped with at the two ends of bushing pipe 8.Nylon joint 7 is sleeves with the level, is used to inflate spindle nose 3 inner inner chambers and is connected with transition between the bushing pipe 8, and the one head inserts in the inflation spindle nose 3 inner inner chambers, and insert in bushing pipe 8 pipes other end.Nylon 11 is stepped cylinders silently, is socketed on successively in the other end and chuck 12 counterbores of bushing pipe 8, is used for fixing bushing pipe 8 rigging positions.And the spacer 16 that embeds in spindle nose 17 inner chambers is to guarantee that rubber swelling pipe 9 is in the fulcrum of central axis.Can make the gap up and down between rubber swelling pipe 9 and the metal cylinder 4 be consistent like this.
The purposes different according to the inflatable axle, its both end sides spindle nose side's of can be made into tenon shape or conical insert wheel shape.The diameter of inflatable axle can accomplish to satisfy the diameter that big paper tube requires, as 6 o'clock paper tube.
