Internal thread structure with variable meshing pitch

Internal thread structure with variable meshing pitch

The utility model relates to a variable meshing pitch internal thread structure which comprises a gradually-changed pitch diameter internal thread section (L1) and a constant pitch diameter internal thread section (L2) which are connected. The gradually-changed pitch diameter internal thread section...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HAN LUMING, YU XIUJUAN, CHEN TIEFENG, BEN CHENYANG, CHEN WEILIANG
Format: Patent
Sprache:chi ; eng
Schlagworte:
BLASTING
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
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Beschreibung
Zusammenfassung:The utility model relates to a variable meshing pitch internal thread structure which comprises a gradually-changed pitch diameter internal thread section (L1) and a constant pitch diameter internal thread section (L2) which are connected. The gradually-changed pitch diameter internal thread section (L1) extends inwards to the constant pitch diameter internal thread section (L2) along the end part, and the pitch diameters of internal threads of the gradually-changed pitch diameter internal thread section (L1) are sequentially reduced; the length of the gradually-changed pitch diameter internal thread section is gt; 0; and the length of the constant pitch diameter internal thread section (L2) is greater than or equal to 0. Compared with the prior art, the variable-meshing-pitch internal thread structure has the advantages that the variable-pitch meshing effect can be achieved, so that the load of the first buckling thread where the external thread and the internal thread of the bolt are meshed is reduced, that