CN201432355Y

CN201432355Y - Extrusion center shaft

Info

Publication number: CN201432355Y
Application number: CN2009201199290U
Authority: CN
Inventors: 王汉双
Original assignee: ZHEJIANG ELECTROTECHNICAL PORCELAIN CO Ltd
Current assignee: ZHEJIANG ELECTROTECHNICAL PORCELAIN CO Ltd
Priority date: 2009-05-18
Filing date: 2009-05-18
Publication date: 2010-03-31
Anticipated expiration: 2019-05-18

Abstract

The utility model discloses an extrusion center shaft, which comprises a connecting shaft and an inner hole mold core, wherein a plurality of segment shafts which are axially articulated into a wholethrough tenons and mortises and locating pins are arranged between the connecting shaft and the inner hole mold core. An axial connecting tenon is arranged at one end of the connecting shaft and extends into a first tenon groove of a first segment shaft; the connecting tenon is articulated with the first tenon groove through locating pins; a first tenon of the first segment shaft extends into a second tenon groove of a second segment shaft; the first tenon is articulated with the second tenon groove through locating pins; a plurality of segment shafts are sequentially connected to the inner hole mold core through tenons and tenon grooves; and the tenon of each segment shaft has an offset angle corresponding to the tenon groove. The shaft overcomes the defects of easy bending, deformation and eccentricity under strong thrust owing to the influence of the factors such as the long lifting distance, large gravity force and content deviation of the mud moisture of the prior art, the extruded mud segment has uniform wall thickness and smooth inner hole, and the effect is obvious.

Description

Squeeze the base central shaft

[technical field]

It is a kind of in the electroceramics wet manufacturing process that the utility model belongs to, and is installed in the crowded base central shaft in the vacuum deairing machine pug output end process tube.

[background technology]

In electroceramics wet manufacturing process process, vacuum pugging is a key operation, and the quality that particularly hollow insulator mud section extrudes quality directly has influence on the service life of product quality and former.Referring to Fig. 1, the vacuum deairing machine that extrudes this type of mud section all needs to set up the long process drum 6 of one 1800～2400mm, this process drum 6 fixedly connects on the port of vacuum deairing machine pug output tube 43, squeezing base central shaft 5 is arranged in the process drum 6, the one end is connected in the screw of vacuum deairing machine lower main axis 4 end faces 42, and the other end and endoporus core rod 7 link.There are the following problems for prior art: squeeze the base central shaft and adopt single long straight shaft or number joint thread connection axle construction, during operation, because it is big from length, the vertical power of deadweight to squeeze base center axle suspension lift, and be subjected to factor affecting such as pug water content deviation, powerful extruding under the pressure effect, very easily produce phenomenons such as crooked, distortion and off-centre, cause extruding mud section wall unevenness, endoporus is rough, wall thickness deviation more than the 20mm, surpasses 40mm at least at most; Moreover this mud section is in processing and forming, and under atwirl situation, centrifugal force increases the damage very easily cause machine equipments such as equipment center axle and cutting tool again, and the product of making is because each differs to contraction, and stress is uneven and cracking is scrapped.Therefore, the design of crowded base central shaft has become the key factor that influences the insulator quality.

[summary of the invention]

For overcoming the problems referred to above that prior art exists, the utility model aims to provide a kind of crowded base central shaft, this is in powerful extruding under the pressure effect, has the automatic aligning function, therefore can not produce phenomenons such as bending, distortion and off-centre, thereby the wall thickness that can effectively guarantee to extrude the mud section is even, endoporus is smooth.

For achieving the above object, the utility model has adopted following technical scheme: this crowded base central shaft, comprise connecting axle and endoporus core rod, connecting axle and endoporus core rod lay respectively at the two ends of squeezing the base central shaft, connecting axle one end and vacuum deairing machine lower main axis draw bail are complementary, it is characterized in that: be some between connecting axle and the endoporus core rod through rebate, alignment pin is to being hinged whole branch nodal axisn, the other end end face of described connecting axle is provided with axial connection tenon, this connection tenon stretches in first tongue-and-groove of first fen nodal axisn, it is hinged by alignment pin to connect the tenon and first tongue-and-groove, first tenon of first fen nodal axisn stretches in second tongue-and-groove of second fen nodal axisn, first tenon and second tongue-and-groove are hinged by alignment pin, successively, a plurality of merogenesis beam warp tenons, tongue-and-groove is attached to the endoporus core rod, and the tongue-and-groove of the relative itself of tenon of described each branch nodal axisn has an angle of eccentricity.

Aforesaid crowded base central shaft, it is characterized in that: each divides the structure of nodal axisn identical, and described angle of eccentricity is 30 degree, after the assembling, spends more than or equal to 360 with the angle of eccentricity between the central plane that is connected tenon with the central plane of the joining N tenon of endoporus core rod.

Aforesaid crowded base central shaft is characterized in that: described alignment pin is a bolt, and the bolt body end of bolt has external screw thread, and bolt was worn to revolve behind tenon, the tongue-and-groove and put on the axle body that is fixed on the branch nodal axisn, and bolt tail is embedded in the axle body of described minute nodal axisn.

Aforesaid crowded base central shaft, it is characterized in that: the structure that described and the joining N of endoporus core rod divide nodal axisn, an end is the N tongue-and-groove, the other end has the mandrel that extends axially to the endoporus core rod, the endoporus core rod is nested with the periphery at mandrel, the endoporus core rod by a bolt shaft to being positioned on the mandrel.

Beneficial effect: compared with prior art, the utility model adopts a plurality of minutes nodal axisns by tenon, base axle construction is squeezed at the center that tongue-and-groove axially connects, although structure is identical concerning each divides nodal axisn, but whole center, assembling back squeezed the base axle and formed following structure: the connecting axle that connects with vacuum deairing machine lower main axis end face be connected the tenon level in first tongue-and-groove that extends first fen nodal axisn after, the angle because the relative horizontal plane of first tenon of first fen nodal axisn has been setovered, therefore, after first tenon assembling of second tongue-and-groove of second fen nodal axisn and first fen nodal axisn, make the relative horizontal plane of second tenon of second fen nodal axisn increase an angle of eccentricity again, successively, N divides the angle of eccentricity summation of the relative horizontal plane of nodal axisn just to increase N doubly (more than or equal to 360 degree), and all divide nodal axisn hinged by pin.During operation, pug is under the powerful thrust of vacuum deairing machine lower main axis spiral leaf, clamp-on in the process drum from vacuum deairing machine pug output tube port, in the reach process of pug in process drum and the peripheral cylindrical shell of endoporus core rod, more piece divides the hinged crowded base central shaft that forms of nodal axisn to move ahead middle each that produces to thrust (producing because of pug humidity is different) according to pug, utilize the universal joint principle to realize automatic aligning, to guarantee levelness, when particularly pug arrives endoporus core rod periphery, pug from the taper enlarging of endoporus core rod tube import be folded to straight shape passage after, the levelness that more can guarantee to squeeze the base central shaft.Facts have proved: although the outstanding distance, deadweight of rising of this crowded base central shaft hangs down power greatly and be subjected to factor affecting such as pug water content deviation, but powerful extruding under the thrust, can not produce phenomenons such as bending, distortion and off-centre, the mud section wall thickness that extrudes is even, endoporus is smooth, and effect is fairly obvious.

For further understanding the utility model content, be further described by embodiment below in conjunction with accompanying drawing.

[description of drawings]

Fig. 1 is the structural representation of the whole device of vacuum pugging, is intended to illustrate that the utility model squeezes the installation position of base central shaft.

Fig. 2 is the three-dimensional decomposition texture schematic diagram that squeezes base central shaft 5 among Fig. 1, the end endoporus core rod 7 that draws among the figure, and divide nodal axisn two joints that also only drawn.

Among the figure: gear-box 1, charging aperture 2, last main shaft 3, lower main axis 4, spiral leaf 41, terminal spiral leaf 42, pug output tube 43, vacuum chamber 44 squeezes base central shaft 5, connecting axle 51, external screw thread 511, connecting hole 512 connects tenon 513; First fen nodal axisn 52, the first tongue-and-grooves 521, the first hinge holes 522, the first tenons 523, the first connecting hole 524; Second fen nodal axisn 53, the second tongue-and-grooves 531, the second hinge holes 532, the second tenons 533, the second connecting hole 534; N divides nodal axisn 54, the N tongue-and-grooves 541, the N hinge holes 542, mandrel 543, step 544, hold-down nut 545; Process drum 6, endoporus core rod 7, endoporus core rod tube 71.

[specific embodiment]

Referring to Fig. 1.After pug entered vacuum deairing machine from charging aperture 2, power rotated main shaft 3 through gear-box 1, and the spiral leaf will just be practiced, mixed pug is sent into vacuum chamber 44.In vacuum chamber 44, pug falls into lower main axis 4 regions, spiral leaf 41 promotes pug and moves forward, and enter in the process drum 6 from pug output tube 43 front end exit, and constantly move forward, extrude from the passage between endoporus core rod 7 outer walls and endoporus core rod tube 71 inwalls at last, the moulded pottery not yet put in a kiln to bake product.The product outer wall is rounded, and interior hole shape is determined by the outer wall shape of endoporus core rod 7, therefore, changes endoporus core rod 7 as required and can change hole shape in the moulded pottery not yet put in a kiln to bake.

Referring to Fig. 2.This figure two joints that only drawn divide nodal axisns, promptly first minute nodal axisn 52 and second fen nodal axisn 53, and in fact, second fen nodal axisn 53 and N divide and also have the 3rd fen nodal axisn to the N-1 between the nodal axisn 54 and divide nodal axisn, but the structure of all branch nodal axisns is all identical.

Crowded base central shaft of the present utility model is by connecting axle 51, first fen nodal axisn 52, second fen nodal axisn 53 ... N-1 divides nodal axisn, N to divide nodal axisn 54, and endoporus core rod 7 constitutes, and first fen nodal axisn 52, second fen nodal axisn 53 ... N-1 divides nodal axisn, N to divide the structure of nodal axisn 54 identical.Divide the quantity of nodal axisn to set as required, but quantity is relevant with the angle of eccentricity of the relative horizontal plane of tenon, its principle is: after the assembling, N-1 divides total angle of eccentricity (or claim anglec of rotation) of horizontal central plane of relative first tongue-and-groove 521 of tenon median plane of nodal axisn should be more than or equal to 360 degree.Therefore, merogenesis number of axle amount is few, just should increase the angle between tenon and the tongue-and-groove, otherwise opposite.In addition, the relative tongue-and-groove horizontal plane of tenon central plane adopts counterclockwise or adopts biasing clockwise, and dual mode all can.

Among Fig. 2, connecting axle 51 1 ends are bolt shape, through being fixedly connected of external screw thread 511 realizations and vacuum deairing machine lower main axis 4 right sides.Connecting axle 51 right sides are established and are connected tenon 513, and the middle part of this connection tenon 513 has a connecting hole 512.The structure of first fen nodal axisn 52 is divided left and right sides two parts, the left-hand axis of circular shaft is to having first tongue-and-groove 521, the radially two side of first tongue-and-groove 521 should be symmetrical, first tongue-and-groove 521 is used to admit the connection tenon 513 of connecting axle 51, after the admittance, connect connecting hole 512 and first hinge hole, 522 radial communication on the tenon 513, make the bolt alignment pin can pass this hinge hole.The bolt body end of described bolt has external screw thread, bolt is worn to revolve to put behind undue nodal axisn axle body, tenon, the tongue-and-groove and is fixed on the merogenesis pivot groove opposite side axle body internal thread, bolt tail then is embedded in the axle body of described minute nodal axisn, promptly hinge hole along in the hole, form the consistent axle surface of height.The right side of circular shaft be provided with connecting axle 51 right sides be connected corresponding to first tenon 523 of tenon 513 structures and first connecting hole 524.As can be seen from Figure 2, the median plane of first tongue-and-groove 521 of the well-behaved relatively nodal axisn of the median plane of first tenon 523 angle (to the left) of having setovered clockwise from the right side.The N-1 that draws in second fen nodal axisn 53 to end divides the structure of the structure of nodal axisn and first fen nodal axisn 52 identical, and therefore, its structure, connecting mode etc. repeat no more.What deserves to be mentioned is: although the structure of all branch nodal axisns and identical, because every joint divides the relative tongue-and-groove of tenon of nodal axisn that one angle of eccentricity is arranged, therefore, bearing after the assembling has just become a screw type installation shaft, total angle of eccentricity (or claim the anglec of rotation, also can be referred to as to call the spiral established angle) is these keys that can realize automatic aligning more than or equal to 360 degree.

N divides the left side structure of nodal axisn 54 identical with aforementioned merogenesis axle construction, and variation has taken place the right side structure.A thinner mandrel 543 is extended on the right side, and mandrel 543 has a step 544 with this joint portion.When connecting with endoporus core rod 7, mandrel 543 stretches into endoporus core rod 7 mesopores, and endoporus core rod 7 is nested with in mandrel 543 peripheries, and step 544 plays and the effect of offseting of endoporus core rod 7 left sides.Through hold-down nut 545 endoporus core rod 7 is axially fixed on the mandrel 543.

Claims

1, a kind of crowded base central shaft, comprise connecting axle (51) and endoporus core rod (7), connecting axle (51) and endoporus core rod (7) lay respectively at the two ends of squeezing the base central shaft, connecting axle (51) one ends and vacuum deairing machine lower main axis draw bail are complementary, it is characterized in that: be some between connecting axle (51) and the endoporus core rod (7) through rebate, alignment pin is to being hinged whole branch nodal axisn, the other end end face of described connecting axle (51) is provided with axial connection tenon (513), this connection tenon (513) stretch into first minute nodal axisn (52) first tongue-and-groove (521) in, it is hinged by alignment pin to connect tenon and (513) first tongue-and-grooves (521), first minute nodal axisn (52) first tenon (523) stretch into second minute nodal axisn (53) second tongue-and-groove (531) in, first tenon (523) and second tongue-and-groove (531) are hinged by alignment pin, successively, a plurality of merogenesis beam warp tenons, tongue-and-groove is attached to endoporus core rod (7), and the tongue-and-groove of the relative itself of tenon of described each branch nodal axisn has an angle of eccentricity.

2, crowded base central shaft as claimed in claim 1, it is characterized in that: each divides the structure of nodal axisn identical, and described angle of eccentricity is 30 degree, after the assembling, spend more than or equal to 360 with the angle of eccentricity between the central plane that is connected tenon (513) with the central plane of the joining N tenon of endoporus core rod (7).

3, crowded base central shaft as claimed in claim 1, it is characterized in that: described alignment pin is a bolt, the bolt body end of bolt has external screw thread, and bolt was worn to revolve behind tenon, the tongue-and-groove and put on the axle body that is fixed on the branch nodal axisn, and bolt tail is embedded in the axle body of described minute nodal axisn.

4, crowded base central shaft as claimed in claim 1, it is characterized in that: the described and joining N of endoporus core rod (7) divides the structure of nodal axisn, one end is a N tongue-and-groove (541), the other end has the mandrel (543) that extends axially to the endoporus core rod (7), endoporus core rod (7) is nested with in the periphery of mandrel (543), endoporus core rod (7) by a bolt shaft to being positioned on the mandrel (543).