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CN-224214545-U - Swivel nut with expansion function

CN224214545UCN 224214545 UCN224214545 UCN 224214545UCN-224214545-U

Abstract

The utility model discloses a swivel nut with inflation function relates to swivel nut technical field, aims at solving and receives vibration, impact load, temperature violent change or factor such as material creep influence for a long time, and threaded connection between swivel nut and the base material probably can become flexible gradually, leads to the swivel nut problem that drops from prefabricated hole even; the self-tapping screw sleeve comprises a screw sleeve body, wherein the screw sleeve body comprises a self-tapping section and an expansion section, the top surface of the self-tapping section is provided with the expansion section for preventing falling and loosening, and the outer wall of the expansion section is provided with a plurality of groups of notches for assisting the expansion section to change the radius; the expansion section is designed through the inner groove of the inner wall and the notch on the screw rib, and the radial expansion of the expansion section can be realized by matching with the action of a subsequent installation tool, so that the expansion section and the screw hole inner wall form tight interference fit after the screw sleeve body is completely installed in place.

Inventors

  • YANG XIAOLONG
  • YANG JINGQI

Assignees

  • 新乡市长岭金属制品有限公司

Dates

Publication Date
20260508
Application Date
20250617

Claims (5)

  1. 1. The screw sleeve with the expansion function comprises a screw sleeve body (1) and is characterized in that the screw sleeve body (1) comprises a self-tapping section (2) and an expansion section (3), the top surface of the self-tapping section (2) is provided with the expansion section (3) for preventing falling and loosening, and the outer wall of the expansion section (3) is provided with a plurality of groups of notches (4) for assisting the expansion section (3) in changing the radius.
  2. 2. The screw sleeve with the expansion function according to claim 1, wherein an inner groove (300) matched with the outer wall threads of the expansion section (3) is formed in the inner wall of the expansion section (3), the inner groove (300) is matched with the outer wall threads of the expansion section (3), and the cross section of the inner groove (300) is of a V-shaped structure.
  3. 3. A screw sleeve with expansion function according to claim 2, characterized in that the notch (4) is provided on the screw ridge of the outer wall screw thread of the expansion section (3).
  4. 4. A screw sleeve with expansion function according to claim 3, wherein the notch (4) is at least one of V-shaped, U-shaped or zigzag and semicircular, and the depth of the notch (4) is smaller than the pitch of the outer wall thread of the expansion section (3).
  5. 5. A screw sleeve with expansion function according to claim 3, characterized in that the outer wall of the expansion section (3) has at least three turns of thread.

Description

Swivel nut with expansion function Technical Field The utility model relates to the technical field of threaded sleeves, in particular to a threaded sleeve with an expansion function. Background Conventional self-tapping sleeves often present challenges in practical applications. Because the cooperation between swivel nut and the prefabricated hole mainly relies on the friction and the mechanical engagement of screw thread, when the factor such as vibration, impact load, temperature violent change or material creep influences for a long time, screw thread connection between swivel nut and the base material probably can become flexible gradually, leads to the swivel nut to drop from the prefabricated hole even, and then causes the connection inefficacy, influences reliability and the security of equipment. Therefore, the application provides the screw sleeve with the expansion function to meet the requirement. Disclosure of utility model The application aims to provide a screw sleeve with an expansion function, and aims to solve the problem that screw connection between the screw sleeve and a base material can be gradually loosened or even the screw sleeve is dropped from a prefabricated hole when the screw sleeve is influenced by factors such as vibration, impact load, severe temperature change or material creep for a long time. In order to achieve the purpose, the screw sleeve with the expansion function comprises a screw sleeve body, wherein the screw sleeve body comprises a self-tapping section and an expansion section, the top surface of the self-tapping section is provided with the expansion section for preventing falling and loosening, and the outer wall of the expansion section is provided with a plurality of groups of notches for assisting the expansion section to change radius. Preferably, an inner groove matched with the outer wall thread of the expansion section is formed in the inner wall of the expansion section, the inner groove is matched with the outer wall thread of the expansion section, and the section of the inner groove is of a V-shaped structure. Preferably, the notch is arranged on a screw edge of the outer wall screw thread of the expansion section. Preferably, the notch is at least one of V-shaped, U-shaped, zigzag or semicircular, and the depth of the notch is smaller than the pitch of the outer wall thread of the expansion section. Preferably, the number of turns of the outer wall thread of the expansion section is at least three. In summary, the utility model has the technical effects and advantages that: According to the utility model, the expansion section is designed through the inner groove of the inner wall and the notch on the screw rib, and the radial expansion of the expansion section can be realized by matching with the action of a subsequent installation tool, so that the expansion section and the screw hole inner wall form tight interference fit after the screw sleeve body is completely installed in place. The interference fit not only greatly enhances the thread engaging force between the screw sleeve and the base body, but also provides an additional mechanical interlocking effect, and effectively prevents the screw sleeve from loosening and falling off due to vibration, impact, shearing stress or temperature change and other factors, thereby greatly improving the reliability and durability of the threaded connection. The design of the post expansion ensures that the threaded sleeve can smoothly enter in the tapping stage and is locked after the tapping is completed, thereby avoiding improper interference of expansion in the installation process and ensuring the smoothness of installation and the final locking effect. Drawings In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a schematic cross-sectional view of the present utility model; fig. 3 is an enlarged schematic view of the structure of fig. 2 according to the present utility model. In the figure, 1, a screw sleeve body, 2, a self-tapping section, 3, an expansion section, 300, an inner groove, 4 and a notch. Detailed Description The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the util