CN202063607U

CN202063607U - Pneumatic friction expansion device

Info

Publication number: CN202063607U
Application number: CN2011201434480U
Authority: CN
Inventors: 谢梅; 宋伯祥
Original assignee: JIANGYIN SHENGANG TELECOMMUNICATION EQUIPMENT FACTORY
Current assignee: JIANGYIN SHENGANG TELECOMMUNICATION EQUIPMENT FACTORY
Priority date: 2011-05-09
Filing date: 2011-05-09
Publication date: 2011-12-07
Anticipated expiration: 2021-05-09

Abstract

The utility model relates to a pneumatic friction expansion device used with mechanical equipment, which comprises a fixed ring (2), retainer rings (3), three arc-shaped expansion blocks (4) and friction blocks (9). Two annular notches (2.4) are respectively arranged on outer edges of end surfaces of the left side and the right side of the fixed ring (2), the retainer rings (3) are fixedly mounted in the annular notches (2.4), the three arc-shaped expansion blocks (4) are spliced to form a ring-shaped expansion block, an annular mounting groove (2.5) is arranged on an outer circle surface of the fixed ring (2), at least six uniformly-distributed through holes (2.1) are arranged at the bottom of the annular mounting groove (2.5), a piston (5) with a sealing ring is mounted in each through hole (2.1), one end of each through hole (2.1) is communicated with a ventilating groove (2.2), the other end of each through hole (2.1) is an inlet and outlet opening of the corresponding piston (5), and a circular friction ring spliced by the two semi-circular friction blocks (9) is mounted in the annular mounting groove (2.5). The pneumatic friction expansion device can expand thin-wall and narrow steel tubes or plastic tubes, can wind winding materials with high sanitation requirements, and is wide in service range.

Description

A kind of Pneumatic friction swelling device

Technical field

The utility model relates to the Pneumatic friction swelling device that a kind of and mechanical equipment coordination use, and especially is fit to be configured in to the cutting of plastics, packing, paper and ultrathin metallic membrane etc., rolling, unreels on the mechanical equipment with rewinding.

Background technology

At present, the coiling of the domestic and imported that uses on the market or unreeling shaft, its swelling device generally adopts air sac or friction-type, because the swelling parts of swelling device and the internal diameter area of contact of rolling core pipe are little, thereby can not swelling approach and narrower material (as steel pipe and soft plastic pipe), swelling paper tube reluctantly, and because paper tube is surperficial and core can not carry out disinfection, therefore the paper tube high coiling material of hygienic requirements of can not reeling, and the degree of utilization again of paper tube is low, does not meet the requirement of present low-carbon environment-friendly.Paper tube is being reeled or is being unreeled in the working process, if rolling or unreel the expansive force that expansive force surpasses the swelling paper tube, paper tube will skid on the swelling parts of wireline reel, just has paper scrap and drops out, and is reeled or unreels material thereby pollute, and pollutes working environment.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of Pneumatic friction swelling device is provided, and it can swelling thin-walled and steel pipe in a narrow margin or moulds pipe, and the high coiling material of the hygienic requirements of reeling or unreel material.

The purpose of this utility model is achieved in that a kind of Pneumatic friction swelling device, it comprises decides circle, back-up ring, bloated piece of arc and friction shoe, described fixed circle is provided with air channel and seal groove, described seal groove has two, described air channel is positioned on the inner peripheral surface of deciding circle, the end face outer, the left and right sides of described fixed circle respectively is provided with an annular breach, described back-up ring is fixedly installed in the annular breach of deciding circle, the bloated piece of arc has two at least, the bloated piece of described at least two arcs is spliced into the bloated piece of annular arrangement, the bloated piece of described annular arrangement is set on the outer circumference surface of deciding circle, be characterized in: the described periphery that encloses surely is provided with annular installation groove, annular is installed bottom portion of groove and is offered 6 well-distributed through holes at least, the piston that has seal ring is installed in the described through hole, one end of through hole is connected with air channel, and the other end is the import and export of piston, and described annular is installed in the groove the circular friction ring that is spliced by two semicircle friction shoes is installed.

The middle part of described semicircle friction shoe is provided with screw hole.

The bloated piece periphery of described arc is provided with friction material.

The bloated piece of described arc has 2 ~ 6.

Described two seal grooves are positioned on the inner peripheral surface on air channel both sides or are positioned on the left and right sides end face of deciding circle.

Multiple tracks groove except that two is set on the described semicircle friction shoe periphery or groove is not set.

Compared with prior art, the beneficial effects of the utility model are:

A kind of Pneumatic friction swelling device of the utility model, it has increased friction ring between piston and the bloated piece of arc, the friction coefficient of friction ring is bigger, and the expand area of contact of piece of it and arc is also bigger, can swelling thin-walled and steel pipe in a narrow margin or mould pipe, its Applicable scope is wider, and arc expands and is coated with friction material on the piece periphery, reeling or unreeling the difficult generation of tube core displacement in the process, make the coiling or the process that unreels more steady.

Description of drawings

Fig. 1 is the structural representation of the utility model Pneumatic friction swelling device.

Fig. 2 is the A-A generalized section of Fig. 1.

Fig. 3 is the structural representation of fixed circle.

Fig. 4 is the structural representation of the another kind of embodiment of fixed circle.

Fig. 5 is the structural representation of back-up ring.

Fig. 6 is the structural representation of the piece that expands.

Fig. 7 is the structural representation of friction ring.

Wherein:

Main shaft 1, enclose 2 surely, through hole 2.1, air channel 2.2, seal groove 2.3, annular breach 2.4, annular are installed groove 2.5, back-up ring 3, chip-removal hole 3.1, boss 3.2, arc expand piece 4, spring groove 4.1, shoulder 4.2, friction material 4.3, piston 5, spring 6, seal ring 7, free air diffuser 8, friction shoe 9, groove 9.1, screw hole 9.2, screw 10.

The specific embodiment

Referring to Fig. 1 ~ Fig. 7, the utility model relates to a kind of Pneumatic friction swelling device, and it comprises decides circle 2, back-up ring 3, the bloated piece 4 of arc, seal ring 7, spring 6, the piston 5 that has friction ring and friction shoe 9.

Described 2 inner headed faces that enclose surely are provided with air channel 2.2 and seal groove 2.3, seal groove 2.3 has two, described two seal grooves 2.3 lay respectively at the right and left of air channel 2.2, surely enclose 2 peripheries and be provided with annular installation groove 2.5, annular is installed groove 2.5 bottoms and is offered 6 well-distributed through holes 2.1 at least, the piston that has seal ring 5 of size and through hole 2.1 couplings is installed in the described through hole 2.1, one end of through hole 2.1 communicates with air channel 2.2, the other end is the import and export of piston 5, in the described annular installation groove 2.5 two sizes are installed and the semicircle friction shoe 9 that groove 2.5 is complementary are installed with annular, described two semicircle friction shoes 9 are spliced to form circular friction ring, described friction shoe 9 with enclose 2 surely and captive joint by screw 10, described 2 the end face outer, the left and right sides enclosed surely respectively is provided with an annular breach 2.4, encloses 2 surely and is sleeved on the main shaft 1 and its air channel 2.1 is aimed at the free air diffuser 8 of main shafts 1.Described seal groove 2.3 can also be arranged on the left and right sides end face of deciding circle 2.

Described back-up ring 3 has two, an one circle boss 3.2 and a circle chip-removal hole 3.1 are arranged on the side of back-up ring 3, boss 3.2 is arranged on the outmost turns of back-up ring 3, chip-removal hole 3.1 is evenly arranged near boss 3.2, two back-up rings 3 are separately fixed in the annular breach 2.4 of deciding circle 2 left and right sides, the boss 3.2 of two back-up rings 3 after fixing is relative, and another side of back-up ring 3 is lower than the side surface of deciding circle 2.

The bloated piece 4 of described arc has 2 ~ 6, be preferably 3, the axial section of each bloated piece is convex shape, the convex shape top is provided with spring groove 4.1, the boss matched of the boss 3.2 of the axial width of the shoulder of convex shape and back-up ring 3, the radial height of the shoulder of convex shape is greater than the boss width of the boss 3.2 of back-up ring 3, the base width of convex shape with enclose two side surfaces of 2 surely on annular breach 2.4 between axial width equate substantially, 3 arcs annular arrangement that piece 4 is spliced into inner periphery size of piece that expands that expands is complementary with the excircle size of enclosing 2 surely, the annular arrangement piece that expands is to be positioned at by above-mentioned two back-up rings 3 and to enclose 2 outer circumference surface surely and surrounded the space that forms, and the periphery that the top of its convex shape section is spliced into is clipped between two outer circumference surfaces of two back-up rings 3 and is spliced into a periphery.Bloated piece 4 peripheries of described arc can also be coated with last layer friction material 4.3, friction material 4.3 can adopt materials such as plastics or rubber, friction material 4.3 is used to increase bloated piece 4 of arc and the tension force that batches or unreel tube core, make that to batch or unreel process more steady, and, in coiling process, be difficult for producing the tube core displacement because friction material is soft.

Described friction shoe 9 its axial widths are complementary with the axial width that the annular of fixed circle is installed groove 2.5, the top of friction shoe 9 is equal with the outer circumference surface that encloses 2 surely or be lower than the outer circumference surface of deciding circle 2, and the bottom of friction shoe 9 offsets with the bottom surface that the annular of enclosing 2 is surely installed groove 2.5.Be symmetrically set with twice groove 9.1 on described friction shoe 9 peripheries, the degree of depth of groove can not surpass half of friction shoe 9 thickness, periphery between the twice groove 9.1 is provided with screw hole 9.2, the effect of groove 9.1 mainly is the area of contact of adjusting between friction shoe 9 and the bloated piece 4 of arc, also groove can be set on friction shoe 9 peripheries, multiple tracks groove except that twice also can be set, and the quantity of groove 9.1 all can be adjusted according to batching or unreel the different of material with width.

Free air diffuser 8 is grooves of axial distribution on the surface of main shaft 1, or the duct that is communicated with of the radial direction through hole in the main shaft 1 and axially extending bore.

Friction swelling device of the present utility model in use, after the ventilation, pressure gas is from the free air diffuser 8 of main shaft 1 air channel of deciding circle 2 2.2 through each friction swelling device, enter through hole 2.1 and promote its each interior piston 5 radial displacements, piston 5 will withstand friction shoe 9 and make the piece 4 radially expansions simultaneously of expanding of arc on friction shoe 9 and the outer edge surface thereof, thereby make the arc piece 4 that expands contact and tighten with the inside face of tube core.After stopping the supple of gas or steam, the bloated piece 4 of arc bounces back under the effect of spring 6, and piston 5 and friction shoe 9 also bounce back simultaneously and reset, and can take off tube core or the coiled material of having spooled this moment from winding off spindle or unreeling shaft.

Claims

1. Pneumatic friction swelling device, it comprises decides circle (2), back-up ring (3) and the arc piece (4) that expands, described fixed circle (2) is provided with air channel (2.2) and seal groove (2.3), described seal groove (2.3) has two, described air channel (2.2) is positioned on the inner peripheral surface of deciding circle (2), the end face outer, the left and right sides of described fixed circle (2) respectively is provided with an annular breach (2.4), described back-up ring (3) is fixedly installed in the annular breach (2.4) of deciding circle (2), the arc piece (4) that expands has two at least, the bloated piece (4) of described at least two arcs is spliced into the bloated piece of annular arrangement, the bloated piece of described annular arrangement is set on the outer circumference surface of deciding circle (2), it is characterized in that: described fixed circle (2) periphery is provided with annular groove (2.5) is installed, annular is installed groove (2.5) bottom and is offered 6 well-distributed through holes (2.1) at least, the piston (5) that has seal ring is installed in the described through hole (2.1), one end of through hole (2.1) is connected with air channel (2.2), the other end is the import and export of piston (5), and described annular is installed in the groove (2.5) the circular friction ring that is spliced by two semicircle friction shoes (9) is installed.

2. a kind of Pneumatic friction swelling device according to claim 1 is characterized in that: be symmetrically set with twice groove (9.1) on described friction shoe (9) periphery, the periphery between the twice groove (9.1) is provided with screw hole (9.2).

3. a kind of Pneumatic friction swelling device according to claim 1 and 2 is characterized in that: described arc piece (4) periphery that expands is provided with plastics or rubber.

4. a kind of Pneumatic friction swelling device according to claim 1 and 2 is characterized in that: the described arc piece (4) that expands has 2 ~ 6.

5. a kind of Pneumatic friction swelling device according to claim 1 and 2 is characterized in that: described two seal grooves (2.3) are positioned on the inner peripheral surface on air channel (2.2) both sides or are positioned to be decided on the end face of circle (2) left and right sides.