CN213684865U

CN213684865U - Expansion type locking screw

Info

Publication number: CN213684865U
Application number: CN202021430290.0U
Authority: CN
Inventors: 谭婷
Original assignee: Dongguan Feilong Hardware Products Co ltd
Current assignee: Dongguan Feilong Hardware Products Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-07-13
Anticipated expiration: 2030-07-20

Abstract

The utility model discloses an inflation formula locking screw, including bolt and expansion pipe, its characterized in that: the cover has two pipes on the bolt, one does the expansion pipe, and its one end is equipped with the open slot, forms the opening piece, and another is the wedge pipe, the expansion pipe left end carries out axial positioning by the nut of bolt, the expansion pipe right-hand member is equipped with the opening piece of partition, be equipped with the external screw thread on the bolt, expansion pipe and wedge pipe are passed in proper order to the bolt right-hand member portion, wedge pipe left end portion is equipped with a tapering, the one end of wedge pipe is equipped with lock nut, lock nut's one end is equipped with the gasket, the terminal surface of gasket respectively with a wedge pipe terminal surface and the contact of elastic gasket right-hand member face. Has the advantages that: keep away from the nut through the opening piece direction of expansion pipe, during operation, the wedge district extrusion expansion pipe of wedge pipe makes the opening piece radius increase of expansion pipe, plays expansion fixing bolt's effect.

Description

Expansion type locking screw

Technical Field

The utility model relates to an expansion bolts field particularly, relates to an inflation formula locking screw.

Background

The screw is a tool for fastening machine parts of the device step by utilizing the physics and mathematical principles of the inclined plane circular rotation and the friction of the object, the screw plays an important role in human activities, a plurality of problems often occur in the use process of the screw, the long-time high-frequency vibration can make the screw slowly loosen and fall off in the operation of the device, a great accident can be caused, the personal safety is influenced, and the screw with stronger fastening capability can be required to prevent the screw from loosening and falling off due to vibration so as to ensure the operation safety of the device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inflation formula locking screw to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an inflation formula locking screw, includes bolt and expansion tube, its characterized in that: the cover has two pipes on the bolt, one does the expansion pipe, and its one end is equipped with the open slot, forms the opening piece, and another is the wedge pipe, the expansion pipe left end carries out axial positioning by the nut of bolt, the expansion pipe right-hand member is equipped with the opening piece of partition, be equipped with the external screw thread on the bolt, expansion pipe and wedge pipe are passed in proper order to the bolt right-hand member portion, wedge pipe left end portion is equipped with a tapering, the one end of wedge pipe is equipped with lock nut, lock nut's one end is equipped with the gasket, the terminal surface of gasket respectively with a wedge pipe terminal surface and the contact of elastic gasket right-hand member face.

Furthermore, a plurality of expansion teeth are arranged at the bottom end of the fixing bolt connected with the nut.

Furthermore, the lower end of the expansion tooth is inclined inwards, and a protrusion is arranged at the lower end of the expansion tooth.

Furthermore, the locking nut is provided with internal threads, and the bottom end of the locking nut is provided with a locking groove.

Further, the elastic gasket is supported by a nut, and the nut is in threaded connection with the bolt.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. keep away from the nut through the opening piece direction of expansion pipe, the during operation, the wedge district extrusion expansion pipe of wedge pipe makes the opening piece radius increase of expansion pipe, plays inflation fixing bolt's effect, simultaneously, forms a barb after the opening piece inflation, increases the degree of difficulty of pulling out, droing, has increased bearing capacity and reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an expansion type locking screw according to the present invention;

fig. 2 is a front view of an expanding type locking screw according to the utility model;

fig. 3 is a schematic structural view of an expansion type locking screw fixing nut according to the present invention.

Reference numerals:

1. a bolt; 2. an expansion tube; 3. an opening sheet; 4. a wedge-shaped tube; 5. a gasket; 6. an elastic pad; 7. A nut; 8. an expansion tooth; 9. a protrusion; 10. a locking nut; 11. and locking the grooves.

Detailed Description

The following, with reference to the drawings and the detailed description, further description of the present invention is made:

referring to fig. 1 to 3, an expansion type locking screw according to an embodiment of the present invention includes a bolt 1 and an expansion tube 2, and is characterized in that: the bolt 1 is sleeved with two pipes, one pipe is the expansion pipe 2, one end of the expansion pipe is provided with an open slot to form an open piece 3, the other pipe is a wedge-shaped pipe 4, the left end of the expansion pipe 2 is axially positioned by a nut of the bolt 1, the right end of the expansion pipe 2 is provided with an equally divided open piece 3, the bolt 1 is provided with external threads, the right end part of the bolt 1 sequentially penetrates through the expansion pipe 2 and the wedge-shaped pipe 4, the left end part of the wedge-shaped pipe 4 is provided with a taper, one end of the wedge-shaped pipe 4 is provided with a locking nut 10, one end of the locking nut 10 is provided with a gasket 5, the end surface of the gasket 5 is respectively contacted with one end surface of the wedge-shaped pipe 4 and the right end surface of an elastic gasket, the bottom end of the fixing bolt connected with the nut 7 is provided with a plurality of expansion teeth 8, the lower ends of the expansion teeth, the bottom end of the locking nut 10 is provided with a locking groove 11, the elastic gasket 6 is supported by the nut 7, and the nut 7 is in threaded connection with the bolt 1.

The working principle is as follows:

during operation, combine with bolt 1 when nut 7, and when rotatory left, wedge pipe 4 is impeld left by gasket 5, 3 internal diameters of wedge areas of 4 one ends of wedge pipe are crowded into opening piece, along with the increase of wedge pipe 4 crowded into left, 3 radius increases of opening piece, play the effect of inflation fixing bolt 1, an barb that forms after opening piece 3 inflation, bolt 1 drives expansion pipe 2 and moves to one side, barb form opening piece 3 on the expansion pipe 2 pierces in the pore wall, make the bolt can not continue to move to one side, form the firm combination in expansion bolt and hole, twist back nut 7, make expansion tooth 8 expand all around, the bottom of the component that needs the fastening is blocked to protruding 9 of 8 lower extremes of expansion tooth, in order to reach the purpose of locking, prevent that the screw from becoming flexible because of the vibration.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An expansion type locking screw comprises a bolt (1) and an expansion pipe (2), and is characterized in that: the utility model discloses a bolt, including bolt (1), expansion pipe (2), one be equipped with the open slot on one end, form opening piece (3), another is wedge pipe (4), expansion pipe (2) left end is carried out axial positioning by the nut of bolt (1), expansion pipe (2) right-hand member is equipped with the opening piece (3) of partition, be equipped with the external screw thread on bolt (1), bolt (1) right-hand member portion passes expansion pipe (2) and wedge pipe (4) in proper order, wedge pipe (4) left end portion is equipped with a tapering, the one end of wedge pipe (4) is equipped with lock nut (10), the one end of lock nut (10) is equipped with gasket (5), the terminal surface of gasket (5) respectively with wedge pipe (4) a terminal surface and the right-hand member face contact of elastic gasket, the bottom of the fixing bolt that nut (7) are connected is equipped with a plurality of inflation tooth (8), the lower end of the expansion tooth (8) inclines inwards, and a bulge (9) is arranged at the lower end of the expansion tooth (8).

2. Expansion lock screw according to claim 1, characterized in that the lock nut (10) is provided with an internal thread and the bottom end of the lock nut (10) is provided with a lock groove (11).

3. Expansion lock screw according to claim 1, characterised in that the elastic washer (6) is supported by a nut (7), the nut (7) being screwed to the bolt (1).