CN212838811U

CN212838811U - Aluminum alloy telescopic self-locking sleeve

Info

Publication number: CN212838811U
Application number: CN202021369793.1U
Authority: CN
Inventors: 奉正洪; 胡秋碧
Original assignee: Changshu Shengfa Aluminum Co ltd
Current assignee: Changshu Shengfa Aluminum Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-03-30
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses an aluminum alloy auto-lock sleeve pipe that stretches out and draws back, include: locating piece, intubate, round pin axle, spring, stand pipe and core pipe, the core pipe sets up in the stand pipe with one heart and extends to stand pipe the place ahead, the interval is provided with first protruding muscle, the protruding muscle of second and the protruding muscle of third that extend along length direction on the stand pipe inner wall, be provided with the spout with first protruding muscle, the protruding muscle of second and the protruding muscle one-to-one of third on the core pipe excircle, be provided with the fourth protruding muscle with the spout one-to-one on the core pipe inner wall, first protruding muscle front portion and rear portion are provided with respectively and extend the lockhole that extends the stand pipe excircle outward, the core pipe rear portion is provided with the jack that corresponds with the lockhole, the intubate passes through the jack and extends to the locating piece, round pin axle bottom sets up in the intubate and is located the top of. In this way, flexible auto-lock sleeve pipe of aluminum alloy, structural strength is high, can realize the auto-lock after flexible, structural stability and operation convenience are good.

Description

Aluminum alloy telescopic self-locking sleeve

Technical Field

The utility model relates to an aluminum alloy tube technical field especially relates to an aluminum alloy auto-lock sleeve pipe that stretches out and draws back.

Background

In order to realize the length change of the pipe part, a part of mechanisms adopt telescopic sleeves, the sleeves are combined into a sleeve through the guide pipe and the core pipe, the length change of the rod part is realized, and the telescopic sleeves are convenient to store and use.

After the sleeve is extended, the sleeve needs to be locked so as to avoid the problems of loosening and shrinking. In the prior art, circular tubes with different outer diameters are usually adopted as the guide tube and the core tube, in order to reduce the dead weight, the wall thickness of the circular tube is thin, the structural strength is insufficient, the problem of relative torsion of the guide tube and the core tube is difficult to resist, the locking structure after stretching is complex, the use stability is poor, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a flexible auto-lock sleeve pipe of aluminum alloy, realizes the auto-lock after the sleeve pipe is flexible, promotes structural strength and stability in use.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides an aluminum alloy telescopic self-locking sleeve pipe, includes: the guide tube is concentrically arranged in the guide tube and extends to the front of the guide tube, first convex ribs, second convex ribs and third convex ribs extending along the length direction are arranged on the inner wall of the guide tube at intervals, the second convex ribs and the third convex ribs are symmetrically distributed below the first convex ribs, sliding grooves corresponding to the first convex ribs, the second convex ribs and the third convex ribs in a one-to-one mode are arranged on the outer circle of the guide tube, fourth convex ribs corresponding to the sliding grooves in a one-to-one mode are arranged on the inner wall of the guide tube, locking holes extending outwards to the outer circle of the guide tube are respectively arranged at the front portion and the rear portion of the first convex ribs, insertion holes corresponding to the locking holes are arranged at the rear portion of the guide tube, the positioning block is arranged between the two fourth convex ribs and located below the insertion holes, the guide tube extends into the positioning block through the insertion holes, and the spring is arranged in the guide tube, the bottom of the pin shaft is arranged in the insertion tube and located above the spring, and when the lock hole is concentric with the insertion hole, the upper portion of the pin shaft extends into the lock hole to be self-locked.

In a preferred embodiment of the present invention, the guide tube, the first rib, the second rib and the third rib are an integral aluminum alloy structure.

In a preferred embodiment of the present invention, the core tube and the fourth rib are an integral aluminum alloy structure.

In a preferred embodiment of the present invention, the positioning block has a blind hole therein corresponding to the insertion tube.

In a preferred embodiment of the present invention, the pin shaft is a stepped shaft, and the diameter of the locking hole is smaller than that of the insertion hole.

In a preferred embodiment of the present invention, the jack openings are located in the corresponding sliding grooves.

The utility model has the advantages that: the utility model provides a flexible self-locking sleeve pipe of aluminum alloy, through first protruding muscle very much, the structure that the protruding muscle of second and third carried out the stand pipe is strengthened, utilize the protruding muscle of fourth to increase the intensity of core pipe, make holistic structural strength higher, be difficult for buckling damage, and the cooperation through the spout, make the stand pipe nimble with the relative flexible of core pipe, avoid the problem of twisting relatively of stand pipe and core pipe, recycle the locating piece and carry out the location of intubate bottom, promote the equipment convenience, make the stand pipe when stretching out and drawing back relatively with the core pipe, round pin axle upper portion can get into the lockhole that corresponds and realize the auto-lock, promote structural stability and operation convenience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced 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 without inventive work, wherein:

fig. 1 is a schematic structural view of a preferred embodiment of an aluminum alloy telescopic self-locking sleeve of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

fig. 3 is an exploded view of fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention includes:

the aluminum alloy telescopic self-locking sleeve shown in fig. 1 and 2 comprises: the positioning block 6, the insertion tube 4, the pin shaft 3, the spring 5, the guide tube 1 and the core tube 2, wherein the core tube 2 is concentrically arranged in the guide tube 1 and extends to the front of the guide tube 1, and the length of the core tube is adjusted by relative extension and retraction.

The interval is provided with along the first protruding muscle 11, the protruding muscle 12 of second and the protruding muscle 13 of third that length direction extends on the 1 inner wall of stand pipe, as shown in fig. 3, first protruding muscle 11, the protruding muscle 12 of second and the protruding muscle 13 annular array of third distribute, and the protruding muscle 12 of second and the protruding muscle 13 symmetric distribution of third are in the below of first protruding muscle 11, and the distribution is even, and structural stability is high. In this embodiment, stand pipe 1, first protruding muscle 11, second protruding muscle 12 and third protruding muscle 13 are integrated aluminum alloy structure, and the dead weight is light, and structural strength is high.

The outer circle of the core tube 2 is provided with sliding grooves 21 which correspond to the first convex ribs 11, the second convex ribs 12 and the third convex ribs 13 one to one, and the sliding grooves 21 are trapezoidal, so that the relative extension and retraction of the guide tube 1 and the core tube 2 are flexible, and the problem of relative torsion of the guide tube 1 and the core tube 2 is avoided. In this embodiment, the inner wall of the core tube 2 is provided with the fourth ribs 23 corresponding to the sliding grooves 21 one to one, and the core tube 2 and the fourth ribs 23 are of an integrated aluminum alloy structure, so that the structural strength is increased on the basis of ensuring the light and thin wall thickness.

The front part and the rear part of the first convex rib 11 are respectively provided with a lock hole 14 extending outwards to the excircle of the guide pipe 1, so that the number of the lock holes 14 is at least 2, the self-locking of 2 telescopic limit positions of the core pipe 2 in the guide pipe 1 is convenient to carry out, a plurality of lock holes 14 can be additionally arranged, and the self-locking of a plurality of positions in the telescopic process is realized.

The back of the core tube 2 is provided with insertion holes 22 corresponding to the locking holes 14, and as shown in fig. 3, the insertion holes 22 are opened in the corresponding sliding grooves. As shown in fig. 2, the positioning block 6 is disposed between the two fourth ribs 23 at the lower portion and below the insertion hole 22, the bottom of the positioning block 6 is a cambered surface, the fitting degree with the inner wall of the core tube 2 is high, the two sides of the positioning block 6 are limited by the two fourth ribs 23, and the structural stability is high. The inserting tube 4 extends into the positioning block 6 through the inserting hole 22, a blind hole 61 corresponding to the inserting tube 4 is formed in the positioning block 6, bottom limiting of the inserting tube 4 is conducted, and assembling is convenient.

Spring 5 sets up in intubate 4, 3 bottoms of round pin axle set up in intubate 4 and be located spring 5's top, carry out the elastic support of round pin axle 3 through spring 5, flexible in-process, when certain lockhole is concentric with jack 22, 3 upper portions of round pin axle extend to and carry out the auto-lock in the lockhole, as shown in fig. 3, in this embodiment, round pin axle 3 is the step shaft, the diameter of lockhole 14 is less than the diameter of jack 22, carry out the spacing of round pin axle 3, avoid round pin axle 3 to fly off, insert lockhole 14 through the slim rod, make 3 tops of round pin axle retract intubate 4, realize the unblock, make things convenient for subsequent flexible operation.

To sum up, the utility model discloses a flexible auto-lock sleeve pipe of aluminum alloy who points out need not bolt or welded fastening, and the equipment is convenient, flexible nimble, and the auto-lock stability after flexible is high, easy and simple to handle.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the present invention, or directly or indirectly applied to other related technical fields, and all included in the same way in the protection scope of the present invention.

Claims

1. The utility model provides an aluminum alloy is flexible from locking tube which characterized in that includes: the guide tube is concentrically arranged in the guide tube and extends to the front of the guide tube, first convex ribs, second convex ribs and third convex ribs extending along the length direction are arranged on the inner wall of the guide tube at intervals, the second convex ribs and the third convex ribs are symmetrically distributed below the first convex ribs, sliding grooves corresponding to the first convex ribs, the second convex ribs and the third convex ribs in a one-to-one mode are arranged on the outer circle of the guide tube, fourth convex ribs corresponding to the sliding grooves in a one-to-one mode are arranged on the inner wall of the guide tube, locking holes extending outwards to the outer circle of the guide tube are respectively arranged at the front portion and the rear portion of the first convex ribs, insertion holes corresponding to the locking holes are arranged at the rear portion of the guide tube, the positioning block is arranged between the two fourth convex ribs and located below the insertion holes, the guide tube extends into the positioning block through the insertion holes, and the spring is arranged in the guide tube, the bottom of the pin shaft is arranged in the insertion tube and located above the spring, and when the lock hole is concentric with the insertion hole, the upper portion of the pin shaft extends into the lock hole to be self-locked.

2. The aluminum alloy telescopic self-locking sleeve according to claim 1, wherein the guide tube, the first rib, the second rib and the third rib are of an integrated aluminum alloy structure.

3. The aluminum alloy telescopic self-locking sleeve according to claim 1, wherein the core tube and the fourth rib are of an integrated aluminum alloy structure.

4. The aluminum alloy telescopic self-locking sleeve according to claim 1, wherein a blind hole corresponding to the insertion tube is formed in the positioning block.

5. The aluminum alloy telescopic self-locking sleeve pipe as claimed in claim 1, wherein the pin shaft is a stepped shaft, and the diameter of the locking hole is smaller than that of the insertion hole.

6. The aluminum alloy telescopic self-locking sleeve according to claim 1, wherein the jack openings are located in the corresponding sliding grooves.