CN212838903U - Inner and outer sleeve type one-way fastener - Google Patents

Abstract

The utility model provides an inside and outside shell type one-way fastener belongs to the fastener field. This one-way fastener of interior outer shell type includes outer sleeve and interior bolt, the outer sleeve is cylindricly and both ends are the opening, internal thread section and level and smooth section have on the outer sleeve inner wall, the internal diameter of level and smooth section is greater than the internal diameter of internal thread section, internal thread section tip is with level and smooth section linking department and form the spacing face of annular, interior bolt outer wall has external thread section and spacing section, external thread section and internal thread section spiro union, elasticity limit structure has on the outer wall of spacing section, when elasticity limit structure is located internal thread section, elasticity limit structure radially gets into and is located interior bolt, when elasticity limit structure is located level and smooth section, interior bolt is radially worn out to elasticity limit structure, the tip of spacing section is for the linkage segment that has the external screw thread. The fastener is connected and fixed in a blind hole state, and is high in stability.

Description

Inner and outer sleeve type one-way fastener

Technical Field

The utility model belongs to the fastener field relates to the one-way fastener of interior shell type.

Background

Bolts are common fasteners and generally consist of a threaded shank with external threads and a head, which is generally polygonal in configuration. Traditional bolt is direct to cooperate with the screw, nevertheless takes place easily not hard up in the vibration environment, therefore the bolt often realizes locking effect with the nut cooperation, nevertheless in the reality, is under this kind of condition of blind hole at the screw, and the nut can't realize the cooperation with the bolt, easily leads to the bolt not hard up problem to appear.

The present application is proposed to solve the above problems.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide the one-way fastener of interior shell type, this one-way fastener of interior shell type realizes connecting fixedly under the blind hole state, and stability is strong, can't cooperate the scheduling problem with the nut when having solved current bolt and blind hole and being connected.

The purpose of the utility model can be realized by the following technical proposal: inside and outside shell type one-way fastener, its characterized in that: including outer sleeve and internal bolt, the outer sleeve is cylindric and both ends are the opening, internal thread section and level and smooth section have on the outer sleeve inner wall, the internal diameter of leveling the section is greater than the internal diameter of internal thread section, internal thread section tip with level section linking department and form annular spacing face, internal bolt outer wall has external thread section and spacing section, external thread section with the internal thread section spiro union, elasticity limit structure has on the outer wall of spacing section, works as elasticity limit structure is located during the internal thread section, elasticity limit structure radially gets into and is located internal bolt, when elasticity limit structure is located when leveling the section, elasticity limit structure radially wears out the internal bolt, the tip of spacing section is for the linkage segment that has the external screw thread.

The outer sleeve is fixed on the object to be connected to realize omnibearing fixation, the inner bolt can be matched with the outer sleeve, and the inner thread section is matched with the outer thread section. The outer diameter of the limiting section on the inner bolt is smaller than that of the outer thread section, the limiting section extends into the inner thread section firstly, the elastic limiting structure is manually enabled to enter the inner thread section, and then the inner thread section is matched with the outer thread section. At this moment, the elastic limiting structure is positioned in the internal thread, and the screw connection movement cannot be influenced. Until elasticity limit structure from the internal thread section tip get into level and smooth section in, the linkage segment gets into the blind hole and realizes the spiro union and accomplish screwing, at this moment under the elastic action, partial structure among the elasticity limit structure pops out, makes partial structure among the elasticity limit structure and the spacing face contact of annular just, even takes place the vibration, because the cooperation of the spacing face of elasticity limit structure and annular, the unable axial motion that takes place of bolt to realize locking anticreep effect.

In foretell inside and outside shell type one-way fastener, elasticity limit structure is including seting up annular mounting groove on the spacing section, annular mounting groove in-connection has a plurality of springs, spring one end with annular mounting groove inner wall links firmly, the spring other end links firmly the outer wall and is convex stopper, and when elasticity limit structure is located when leveling on the section, stopper subregion is located annular mounting inslot.

The elastic limiting structure consists of an annular mounting groove, a spring and a limiting block. When the elastic limiting structure completely enters the leveling section, the inner end of the limiting block is positioned in the annular mounting groove, so that the phenomenon that the limiting block is loosened due to the fact that the limiting block is completely separated can be prevented.

In the above one-way fastener, the number of the springs is two, and the two limiting blocks are semicircular.

In practice other numbers are possible.

In the above inner and outer sleeve type one-way fastener, the elastic limit structure is located between the connection section and the outer thread section.

In the inner and outer sleeve type one-way fastener, the limiting block, the outer sleeve and the inner bolt are made of the same material.

The material has various choices, and common bolt materials can be selected.

In the above inner and outer sleeve type one-way fastener, the outer wall of the end portion of the outer sleeve is radially and integrally formed with a ring-shaped fixing portion, and the fixing portion is provided with a plurality of positioning holes.

And bolts or other fasteners are inserted into the positioning holes to realize the connection and fixation of the outer sleeve and the connected object.

Compared with the prior art, the inner and outer sleeve type unidirectional fastener has the following advantages:

1. this inside and outside shell type one-way fastener passes through elasticity limit structure and the spacing face structural design of annular, realizes that axial motion is fixed, effectively plays locking anticreep effect, structural design is ingenious.

2. The inner sleeve type one-way fastener has an inner structure design and an outer structure design, the connection and fixation of the inner bolt and the connected object are realized by utilizing the outer sleeve, the conception is novel, and the problem that the blind hole can not be connected with the nut is solved.

3. This one-way fastener of interior outer shell type passes through linkage segment parcel design, makes the linkage segment by the parcel in outer sleeve, has played rust-resistant dustproof effect to a certain extent.

4. This elasticity limit structure in interior outer shell type one-way fastener is simple effective, can switch rapidly on internal thread section and level and smooth section, plays spacing effect, structural design is ingenious.

Drawings

Fig. 1 is a structural cross-sectional view of the present inner and outer sleeve one-way fastener.

Fig. 2 is an enlarged view of a structure of a region a in fig. 1.

List of reference numerals

In the figure, 1, an outer sleeve;

1a, an internal thread section;

1a1, an annular limiting surface;

1b, leveling;

1c, a fixing part;

1c1, locating holes;

2. an inner bolt;

2a, an external thread section;

2b, a limiting section;

2b1, connecting segment;

2b2, annular mounting groove;

3. a spring;

4. and a limiting block.

Detailed Description

As shown in fig. 1 and 2, the one-way fastener includes an outer sleeve 1 and an inner bolt 2, the outer sleeve 1 is cylindrical and has openings at both ends, an inner thread section 1a and a flat section 1b are provided on the inner wall of the outer sleeve 1, the inner diameter of the flat section 1b is larger than that of the inner thread section 1a, an annular limiting surface 1a1 is formed at the joint of the inner thread section 1a and the flat section 1b, the outer wall of the inner bolt 2 has an outer thread section 2a and a limiting section 2b, the outer thread section 2a is screwed with the inner thread section 1a, the outer wall of the limiting section 2b has an elastic limiting structure, when the elastic limit structure is positioned on the internal thread section 1a, the elastic limit structure radially enters the internal bolt 2, when the elastic limiting structure is positioned in the flat section 1b, the elastic limiting structure radially penetrates out of the inner bolt 2, and the end part of the limiting section 2b is provided with a connecting section 2b1 with external threads. The outer sleeve 1 is fixed on the object to be connected to realize omnibearing fixation, the inner bolt 2 can be matched with the outer sleeve 1, and the inner thread section 1a is used for being matched with the outer thread section 2 a. The outer diameter of a limiting section 2b on the inner bolt 2 is smaller than that of an outer thread section 2a, firstly, the limiting section 2b extends into the inner thread section 1a, an elastic limiting structure is manually enabled to enter the inner thread section 1a, and then the inner thread section 1a is matched with the outer thread section 2 a. At this moment, the elastic limiting structure is positioned in the internal thread, and the screw connection movement cannot be influenced. Until elasticity limit structure from the internal thread section 1a tip get into in leveling section 1b, linkage segment 2b1 gets into the blind hole and realizes the spiro union and accomplish screwing, this moment under the elastic action, partial structure among the elasticity limit structure pops out, make partial structure among the elasticity limit structure and the spacing face of annular 1a1 contact just, even vibrate, because the cooperation of elasticity limit structure and the spacing face of annular 1a1, axial motion can't take place for the bolt, thereby realize locking anticreep effect.

Elasticity limit structure includes sets up annular mounting groove 2b2 on spacing section 2b, and annular mounting groove 2b2 in-connection has a plurality of springs 3, and 3 one ends of spring link firmly with annular mounting groove 2b2 inner wall, and the spring 3 other end links firmly the stopper 4 that the outer wall is convex, and when elasticity limit structure was located flat section 1b, 4 part region of stopper were located annular mounting groove 2b 2. The elastic limiting structure consists of an annular mounting groove 2b2, a spring 3 and a limiting block 4. When elasticity limit structure got into level section 1b completely, stopper 4 inner was located annular mounting groove 2b2, can prevent to be not hard up because of stopper 4 breaks away from the stopper 4 that leads to completely. The number of the springs 3 is two, and the limiting blocks 4 are two and are semicircular. In practice other numbers are possible. The elastic stopper structure is located between the connecting section 2b1 and the male screw section 2 a. The limiting block 4, the outer sleeve 1 and the inner bolt 2 are made of the same material. The material has various choices, and common bolt materials can be selected. The outer wall of one end of the outer sleeve 1 is integrally formed with a ring-shaped fixing part 1c in the radial direction, and the fixing part 1c is provided with a plurality of positioning holes 1c 1. The connection and fixation of the outer sleeve 1 and the connected object are realized by inserting bolts or other fasteners through the positioning holes 1c 1.

Details, structures, dimensions and principles not mentioned in the present application are all known in the art or can be obtained by simple selection of those skilled in the art, and are not described in detail.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. Inside and outside shell type one-way fastener, its characterized in that: including outer sleeve and internal bolt, the outer sleeve is cylindric and both ends are the opening, internal thread section and level and smooth section have on the outer sleeve inner wall, the internal diameter of leveling the section is greater than the internal diameter of internal thread section, internal thread section tip with level section linking department and form annular spacing face, internal bolt outer wall has external thread section and spacing section, external thread section with the internal thread section spiro union, elasticity limit structure has on the outer wall of spacing section, works as elasticity limit structure is located during the internal thread section, elasticity limit structure radially gets into and is located internal bolt, when elasticity limit structure is located when leveling the section, elasticity limit structure radially wears out the internal bolt, the tip of spacing section is for the linkage segment that has the external screw thread.

2. The male and female one-way fastener of claim 1, wherein the elastic limit structure comprises an annular mounting groove formed on the limit section, a plurality of springs are connected in the annular mounting groove, one end of each spring is fixedly connected with the inner wall of the annular mounting groove, the other end of each spring is fixedly connected with a limit block, the outer wall of each limit block is in the shape of a circular arc, and when the elastic limit structure is located on the flat section, part of the limit block is located in the annular mounting groove.

3. The inner and outer sleeve type one-way fastener according to claim 2, wherein the number of the springs is two, and the two limit blocks are semicircular.

4. A male and female one-way fastener according to claim 1, 2 or 3, wherein said resilient retention structure is located between said connecting section and said male threaded section.

5. The male and female one-way fasteners according to claim 2 or 3, wherein the stop block, the outer sleeve and the inner bolt are made of the same material.

6. The inner and outer sleeve type one-way fastener according to claim 1, 2 or 3, wherein a ring-shaped fixing portion is formed radially and integrally on an outer wall of an end portion of the outer sleeve, and the fixing portion is provided with a plurality of positioning holes.

Images