CN212356069U - A kind of air expansion shaft expansion sleeve - Google Patents

Abstract

The utility model discloses an inflatable shaft expansion sleeve, which comprises a shaft sleeve body and a tightening device; the shaft sleeve is formed by splicing a plurality of fan-shaped sleeve blocks; the center of the shaft sleeve body is provided with a suitable The sleeve connection hole of the air expansion shaft is sleeved; the tightening device provides a centripetal force directed to the axis of the shaft sleeve so that the sleeve connection blocks are assembled into a circle. The utility model tightens the sleeve block by the tightening device, so that the sleeve block can be conveniently sleeved on the air expansion shaft that needs to be transferred, and at the same time, the sleeve connection block can be opened according to the expansion of the air expansion shaft. And tightening, increasing the working diameter of the air shaft, so that the small diameter air shaft can also be covered with a large diameter pipe body, without frequent replacement of the air shaft, reducing the cost of purchasing the air shaft, and it is very convenient to use.

Description

Inflatable shaft expansion sleeve

Technical Field

The utility model relates to an inflatable shaft especially relates to an inflatable shaft cover that rises.

Background

The inflatable shaft is a special winding and unwinding shaft, namely, the shaft with the surface capable of protruding after being inflated by high pressure and the shaft with the surface part capable of retracting rapidly after being deflated is called the inflatable shaft,

the major diameter inflatable shaft is the whole pipe fitting structure mostly in the existing market, and the dead weight is big, is difficult to disassemble, is difficult to maintain, and when the required work piece pipe diameter that cup joints grow, is difficult to change inflatable shaft pipe diameter thereupon, can only change inflatable shaft this moment, and the process is troublesome, has also increased the cost of purchasing different diameter inflatable shafts, consequently is necessary to design the inflatable shaft cover that rises that conveniently increases inflatable shaft working diameter.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a conveniently increase inflatable shaft cover that rises of inflatable shaft working diameter.

Realize the utility model discloses the technical scheme of purpose is: an air expansion shaft expansion sleeve comprises a shaft sleeve body and a tightening device; the shaft sleeve is formed by splicing a plurality of sleeving blocks with sector sections; the center of the shaft sleeve body is provided with a sleeving hole suitable for sleeving the air expansion shaft; the tightening device provides a centripetal force which points to the axis of the shaft sleeve to enable the socket blocks to be spliced into a circular shape.

Three sleeving blocks are arranged; each sector angle is 120 °.

The tightening device comprises at least one tightening groove and a tightening tension spring matched with the tightening groove; the tightening groove is circumferentially arranged on the outer surface of the shaft sleeve body; and a tightening tension spring is sleeved in the tightening groove.

The three tightening grooves are respectively arranged at the two ends and the middle part of the shaft sleeve body.

The outer ring of the sleeving connection block is provided with inner arc-shaped notches along the two circumferential ends.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

(1) the utility model discloses a tightening means tighten up the grafting piece, make the piece of cup jointing can conveniently cup joint on the inflatable shaft that needs the switching, make the grafting piece can expand thereupon and tighten up according to the condition of expanding of inflatable shaft simultaneously, increased the working diameter of inflatable shaft, make the inflatable shaft of minor diameter also can sheathe body of major diameter, need not frequent change inflatable shaft, reduced the cost of purchase inflatable shaft, it is very convenient to use.

(2) The utility model discloses a cup joint the piece and be equipped with three, every fan-shaped angle is 120, can provide and provide good making to cup jointing the work piece, and it is sensitive to expand and tighten up the reaction of the axle that rises to the gas simultaneously.

(3) The utility model discloses a tightening means establishes the extension spring that tightens up of tightening up the inslot for tightening up groove and cover, and the extension spring setting is tightening up the inslot, does not influence and cup joints the work piece on the axle sleeve body, will cup joint a resilient connection together simultaneously, simple structure, and is with low costs.

(4) The utility model discloses a tighten up the groove and be provided with respectively at axle sleeve body both ends and middle part, tighten up the dynamics balanced, tighten up effectually, make the piece that cup joints to expand simultaneously and tighten up.

(5) The utility model discloses a cup joint the piece and be equipped with interior arc breach along circumference both ends, conveniently pull open the cover with the hand and connect the piece.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an axial sectional view of the present invention.

The reference numbers in the drawings are as follows:

the cup jointing block 1, the cup jointing hole 2, the tightening groove 3, the tightening tension spring 4 and the inner arc-shaped notch 5.

Detailed Description

(example 1)

Referring to fig. 1 and 2, the inflatable shaft expansion sleeve of the present embodiment includes a sleeve body and a tightening device. The shaft sleeve is formed by splicing a plurality of splicing blocks 1 with fan-shaped sections. The center of the shaft sleeve body is provided with a sleeving hole 2 suitable for sleeving the air expansion shaft. The tightening device provides a centripetal force directed towards the axis of the sleeve to cause the splicing block 1 to splice into a circular shape.

In order to increase the sleeving effect, three sleeving blocks 1 are arranged. Every fan-shaped angle is 120, under the condition of guaranteeing the effect of cup jointing, will cup joint 1 quantity and reduce to minimum, has reduced the structural complexity, facilitates the use.

In order to connect the block 1, the tightening device comprises at least one tightening groove 3 and a tension tightening spring 4 which engages with the tightening groove 3. The tightening groove 3 is circumferentially arranged on the outer surface of the shaft sleeve body. The tightening tension springs 4 are sleeved in the tightening grooves 3, the sleeving blocks 1 are elastically connected together through the tightening tension springs 4 sleeved outside the shaft sleeve body, so that the sleeving blocks are sleeved on the small-size inflatable shaft, the tightening tension springs 4 are sleeved in the tightening grooves 3, the tightening tension springs 4 can be prevented from falling off, and meanwhile, when the internal inflatable shaft is expanded, the sleeving blocks 1 can be expanded accordingly.

In order to enhance the tightening effect, the number of the tightening grooves 3 is three, the tightening grooves are respectively arranged at the two ends and the middle of the shaft sleeve body, and the tightening tension springs 4 are sleeved at the two ends and the middle of the shaft sleeve body, so that the tightening effect is enhanced.

In order to conveniently operate the sleeving block 1, the two ends of the outer ring of the sleeving block 1 along the circumferential direction are provided with inner arc-shaped notches 5, so that the sleeving block 1 can be conveniently pulled open by hand to be sleeved on a small-size air expansion shaft or taken down from the air expansion shaft.

The working principle of the embodiment is as follows: when the inflatable sleeve is sleeved, the inner arc-shaped notch 5 is buckled by a hand, the sleeving connection block 1 is pulled to be in a proper diameter and sleeved on the inflatable shaft. The sleeve connecting block 1 is taken down after the inner arc-shaped notch 5 is buckled by a hand to separate from the air expansion shaft.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. An air-expanded shaft expansion sleeve, characterized in that: it comprises a shaft sleeve body and a tightening device; the shaft sleeve is assembled from a plurality of fan-shaped socket blocks (1) in cross-section; the center of the shaft sleeve body A sleeve connection hole (2) suitable for sleeve connection of the air-expanded shaft is provided; the tightening device provides a centripetal force directed to the axis of the shaft sleeve so that the sleeve connection block (1) is assembled into a circle. 2. An air-expandable shaft expansion sleeve according to claim 1, characterized in that: the sleeve connection blocks (1) are provided with three; the angle of each sector is 120°. 3. An air-expanding shaft expansion sleeve according to claim 1, characterized in that: the tightening device comprises at least one tightening groove (3) and a tightening tension spring (3) matched with the tightening groove (3). 4); the tightening groove (3) is circumferentially arranged on the outer surface of the shaft sleeve body; the tightening groove (3) is sleeved with a tightening tension spring (4). 4. An air-expandable shaft expansion sleeve according to claim 3, characterized in that: there are three tightening grooves (3), which are respectively arranged at both ends and the middle of the shaft sleeve body. 5. An inflatable shaft expansion sleeve according to claim 1, characterized in that: the outer ring of the sleeve connection block (1) is provided with inner arc-shaped notches (5) at both ends along the circumferential direction.

Images