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CN-113983062-B - Shrinkage locknut assembly

CN113983062BCN 113983062 BCN113983062 BCN 113983062BCN-113983062-B

Abstract

A shrinkage locknut assembly comprises a wedge nut, a mortise nut and a bolt, wherein the mortise nut rotates to a certain position of the bolt, a wedge nut rotating projection is inserted into a gap between a nut body and the nut body to be empty, a nut body prevents the projection from moving outwards, the thrust of the inner diameter of the projection presses the nut body, the nut body bends inwards to shrink, threads on the nut body press the bolt to increase friction to prevent loosening, when the locknut is disassembled, a spanner is used for fixing the mortise nut, a driving device drives the wedge nut to rotate backwards, the projection pulls out the gap between the nut body and the nut body to be empty, the wedge nut is disassembled, and a driving device drives the mortise nut to rotate backwards to disassemble the mortise nut.

Inventors

  • XU RUNZHU

Assignees

  • 许润柱

Dates

Publication Date
20260512
Application Date
20211002

Claims (5)

  1. 1. A shrinkage locknut assembly is characterized in that the locknut assembly uses inward thrust to deform and shrink a conical threaded hole or a part of the conical threaded hole of an object and comprises a wedge nut, a mortise nut and a bolt, The wedge nut is characterized in that a conical tube bulge is added at one end of a common nut, the thickness of the tail end of the bulge is larger than that of the concave hollow top end, the thickness of the top end of the bulge is smaller than that of the concave hollow top end, the wedge nut has higher rigidity than that of the mortise nut, is in interference fit with the conical tube concave hollow or the cylindrical tube concave hollow of the mortise nut, The mortise nut is an eccentric mortise nut or a positive mortise nut, a conical pipe concave hollow or a cylindrical pipe concave hollow is added at one end of a common nut body, a nut body in the conical pipe concave hollow or the cylindrical pipe concave hollow is provided with a uniform multi-radial gap, the concave hollow top end is smaller than the thickness of the tail end of the projection, the concave hollow tail end is larger than the thickness of the top end of the projection, the mortise nut is larger than the wedge nut in elasticity, the threaded hole is one of a conical threaded hole and a part of a conical threaded hole and is in interference fit with the conical pipe projection of the wedge nut, The mortise nut is arranged on the bolt rod, the driving device drives the mortise nut to rotate to achieve the pretightening force for fastening, the driving device drives the wedge nut to rotate, the protrusion is inserted into the gap of the nut body, the thickness of the inner end of the protrusion is larger than that of the outer end of the recess, the wedge nut is more rigid than the mortise nut, the nut body prevents the protrusion from moving outwards, the nut body is pressed inwards in the protrusion, the nut body is contracted in the inwards bent threaded hole, and the screw thread on the nut body presses the bolt to increase friction force and prevent loosening.
  2. 2. A shrink lock nut assembly as claimed in claim 1, in which an eccentric wedge nut is used in conjunction with a positive mortise nut, the so-called eccentric wedge nut being a projection which is slightly offset to one side from the centre of the nut.
  3. 3. A shrink lock nut assembly as claimed in claim 1, wherein a positive wedge nut is used in combination with an eccentric mortise nut, wherein the gap of the nut body is slightly deviated to one side from the center of the mortise nut.
  4. 4. A shrinkage check nut assembly as claimed in claim 1, wherein the thread of the mortise nut is a tapered threaded hole, and the thread is gradually enlarged from the end of the mortise nut to the top of the mortise nut.
  5. 5. A shrinkage check nut assembly as claimed in claim 1, wherein the thread of the mortise nut is a partially tapered thread, the end of the mortise nut is a tapered threaded hole, and the top end of the mortise nut is a standard thread.

Description

Shrinkage locknut assembly The technology belongs to the field: Relates to the field of nut looseness prevention. The background technology is as follows: Common mechanical looseness prevention methods include old looseness prevention methods such as double nuts, gaskets, spring washers and the like, and methods such as double-gasket looseness prevention, thread tooth looseness prevention, metal locking looseness prevention and nonmetal locking looseness prevention of foreign published technologies, and Japanese Hadeloc does not have a technical published concave-convex method. Although the principle of the concave-convex nut of the Hedway in Japan is self-called from the wedge principle of the ancient woodworking technology in China, the shadow of the wedge principle is not seen from the nut entering China, the eccentric locking and anti-loose principle is seen, and the ancient woodworking technology in China also has the hollow mortise, tenon and wedge locking and girder connecting technology, but the prior bolt mortise and tenon is difficult to disassemble, the nut mortise and tenon is not only mortise and tenon, but also has no wedge to use threads, and the shrinkage anti-loose nut component with low technical content and simple structure and easy disassembly of mortise, tenon and wedge structures is introduced. The invention comprises the following steps: The existing expansion screw anti-loosening function is a component which deforms, expands and loosens an object by using outward thrust, and conversely, the existing expansion screw anti-loosening function is a component which deforms and contracts an anti-loosening nut by using inward thrust, and the anti-loosening screw comprises a wedge gasket or a wedge nut, a mortise nut and a bolt, The wedge pad is characterized in that a conical tube bulge or a cylindrical tube bulge 3 is added at one end of a common pad (the wedge pad can also achieve the purpose of looseness prevention, the wedge pad is in front when being installed, the mortise nut is behind, and the wedge pad is difficult to detach, or the wedge nut is characterized in that the conical tube bulge or the cylindrical tube bulge 3 is added at one end of the common nut, the thickness of the tail end of the bulge 3 is larger than that of the concave hollow top end, the thickness of the top end of the bulge is smaller than that of the concave hollow top end, and the wedge nut has higher rigidity than the mortise nut and belongs to interference fit. The mortise nut is characterized in that a conical pipe concave hollow or a cylindrical pipe concave hollow is added at one end of a common nut body to form a gap between a nut body 7 and a nut body 8, the thickness of the concave hollow top end is smaller than that of the tail end of the projection, the thickness of the concave hollow tail end is larger than that of the top end of the projection, and the mortise nut has better elasticity than that of a wedge nut, and belongs to interference fit. It is also possible to provide a plurality of radial slots 9 in the nut body 8 in the hollow conical tube or in the hollow cylindrical tube. The mortise nut 5 rotates to a certain position of the bolt and is fixed by a spanner, the wedge nut 1 rotates to insert the bulge 3 into the gap between the nut body 7 and the nut body 8, the thrust of the inner diameter 4 of the bulge presses the nut body 8, the nut body 8 bends inwards to shrink, the screw thread 6 on the nut body 8 presses the bolt 10 to increase friction force to prevent loosening, the mortise nut and the wedge nut are locked at a certain position of the bolt, and satisfactory loosening prevention effect can be obtained under the condition of high matching precision. Because the existing internal screw thread of the nut has a certain problem of large matching tolerance for the common use and manufacturing precision of the bolt, the internal screw thread is limited by the large rigidity, the small compression elasticity of the nut, and the uneven anti-loosening effect is inevitably generated. The eccentric wedge nut is matched with the positive mortise nut, so that the defects of large matching tolerance and limitation of large rigidity, small compression elasticity of the nut are overcome, and the eccentric mortise nut is characterized in that a protrusion 3 deviates slightly to one side at the center of the nut 1. Or the positive wedge nut is matched with the eccentric mortise nut to overcome the defects of large matching tolerance, high rigidity, high compression elasticity and small elasticity of the nut, and the eccentric mortise nut is characterized in that a gap between the nut body 7 and the nut body 8 deviates slightly from the center of the mortise nut 5 to one side. Or the thread of the mortise nut is a conical threaded hole, the thread is gradually enlarged from the top end of the nut body 8 to the tail end of the nut 5, and the defects of large matching tolerance, high rigidity, compress