A kind of Yarn tension adjustment piece
Technical field
The technical field of the utility model textile machine is meant a kind of Yarn tension adjustment piece that can be applicable on the knitting yarn storage device especially.
Background technology
Be installed in the yarn tension adjusting device of storage yarn drum one side in the knitting yarn storage device, it directly acts on from storage yarn drum and goes up the yarn that unwinding is come out, and makes yarn keep the tension force of basically identical.In actual use, the yarn of high speed whipping constantly rubs to this yarn tension adjusting device, makes the yarn tension adjusting device itself become a wearing detail, needs frequently to change.And original yarn tension adjusting device is not an integral piece, it is all cumbersome to make and install replacing, thereby a kind of Yarn tension adjustment piece of one invented, and is that the Chinese invention patent application " Yarn braking body " of ZL200580031732.6 (publication number is CN101023014A) discloses so a kind of Yarn braking body as application number.The elasticity frustocone coat of this Yarn braking body for making by plastic material, it have almost circular larger diameter end, almost circular smaller diameter end and by the part inner surface of frustocone coat limit along the continuous brake area of circumference and smaller diameter end along the continuous spherical support of circumference.When practical set, this spherical support is placed in the supporting installation chassis with spherical limited pit, and by the installation chassis centralized positioning, that is, it is the center symmetry at center that whole Yarn braking body is reached with the central shaft of installation chassis.The tension force that the last yarn of exporting from the smaller diameter end of Yarn braking body is consistent, just must apply uniform brake force by the yarn that Yarn braking body comes out to continuous unwinding, thereby whether the overall structure of this Yarn braking body is centrosymmetric, rigging position comprise in the practical work process the position whether centralized positioning be crucial.
For the overall structure of Yarn braking body, if will realize comparatively desirable centrosymmetric structure, the center of the smaller diameter end through hole of Yarn braking body and the center of whole frustocone coat must be on same straight lines.But Yarn braking body itself is the plates of being made by thin plastics, and in the actual processing, the through hole of Yarn braking body medium-small diameter end is a punching press gained again after whole plates injection moulding is finished.In the above-mentioned technical scheme of applying for a patent, because the support member part surface in this Yarn braking body is a sphere, make when the through hole of punching press smaller diameter end, the centralized positioning of whole plates is for comparatively difficult, the sphere of support member causes skew easily, make that the centre deviation of the relative frustocone coat in center of actual smaller diameter end through hole is bigger, can't guarantee that this center, hole and frustocone coat are on same straight line;
Moreover, comprise position in the practical work process for the rigging position of Yarn braking body, equally, because the supporter of Yarn braking body partly is a sphere, the inclined plane of supporter both sides for extending, when supporter is installed on having the installation chassis of spherical limited pit, easy relativity shift, can not reach good centralized positioning, in the easier relative slip of when work supporter, be difficult for relative installation chassis centralized positioning;
More than two kinds of situations, in actual application, all can cause the deterioration of Yarn braking body center symmetry effect, make yarn when the braking action face by storage yarn drum unwinding edge and Yarn braking body, can't obtain the surface tension of ideal uniform unanimity.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of Yarn tension adjustment piece at the present situation of prior art, it can realize accurate centrosymmetric structure when processing and manufacturing, can when installing and work, guarantee again to keep centralized positioning, thereby can make the yarn of unwinding output keep the comparatively surface tension of ideal uniform unanimity with installation chassis.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this Yarn tension adjustment piece, comprise elasticity frustum of a cone sheet with almost circular larger diameter end, almost circular smaller diameter end, connect elasticity frustum of a cone sheet and smaller diameter end along the continuous support member of circumference, wherein, the part inner surface of described elasticity frustum of a cone sheet forms along the continuous tension adjustment face of circumference, it is characterized in that: described support member has the annular arc sections that relative smaller diameter end arches upward laterally and forms, and this annular centers of arc sections axle is positioned on the central shaft of described elasticity frustum of a cone sheet.
When practical application, the big hole that larger diameter end forms, its diameter is to be decided by the diameter that the storage yarn rouses, the small sircle hole that smaller diameter end forms, and the height that the relative smaller diameter end of annular arc sections of its diameter and support member arches upward is to be decided by the diameter that is fixed on the porcelain eye on the installation chassis.
As further improvement, make Yarn tension adjustment piece can be easier to out casement towards smaller diameter end, described support member can also be connected with a circle horizontal part, and described smaller diameter end is located on this horizontal part, with the accessory location, plays positioning action by horizontal part.
As further improvement, described elasticity frustum of a cone sheet, support member and smaller diameter end can have consecutive identical wall thickness, and so, Yarn tension adjustment piece can utilize Vacuum shaping manufacturing by the common planar blank as integral piece.
Described wall thickness is preferably 0.2mm to be good in 0.15~0.5mm scope.Certainly, smaller diameter end, part support member and part elasticity frustum of a cone sheet can be provided with different wall thickness, do not influence use.
As further improvement, the coning angle (α) of described elasticity frustum of a cone sheet is to be good in 85 °~135 ° scopes, and coning angle (α) is preferably 90 °.
As further improvement, described support member and elasticity frustum of a cone sheet are the best with tangent transition, and transition is along sliding.
As further improvement, can have one section tangent little circular arc between described support member and the smaller diameter end and transition.
As further improvement, the arc radius of annular arc sections is preferably 3mm to be good in the described support member in 2~5mm scope.
This Yarn tension adjustment piece integral body can be made by plastic material, can be by Vacuum shaping manufacturing on the formation mould, perhaps adopt the thermal vacuum typing to make, application for the yarn that satisfies different thicknesses, plastic material has high-wearing feature to select for use, low-friction coefficient, to have better surface properties be good, for example PC, PET or PVC.
Wherein, the used die surface of finished yarn tension adjustment sheet must polish, so that make the inner surface of the Yarn tension adjustment piece that produces smooth, at least the tension adjustment face place in the Yarn tension adjustment piece is smooth, the inner surface of described elasticity frustum of a cone sheet at least the roughness of tension adjustment face be less than or equal to 1.6 for good (promptly, Ra≤1.6), be preferably and be less than or equal to 0.8 (promptly, Ra≤0.8), thereby reduce the coefficient of friction of yarn when unwinding, this point seems particularly important when extracting spun yarn.
Compared with prior art, advantage of the present utility model is: by the support member that will connect elasticity frustum of a cone sheet and smaller diameter end be designed to upwards arch upward annular circular-arc, form a location division of arching upward in the Yarn tension adjustment piece end, when the location, be difficult for producing skew, be highly susceptible to the location, make when finished yarn tension adjustment sheet, when the small sircle hole of punching press smaller diameter end, whole Yarn tension adjustment piece is easier to centralized positioning, can realize the accurate centrosymmetric structure of Yarn tension adjustment piece; Simultaneously, Yarn tension adjustment piece is when installing and work, be spacingly to have on the installation chassis of the circular pit that matches with annular arc sections one, have the circular-arc support member of annular when installing on the installation chassis that matches with it, accurate positioning is difficult for skew, when parts are worked, support member is difficult for sliding relatively at installation chassis, can guarantee to keep centralized positioning with installation chassis, thereby can make the yarn of unwinding output keep the comparatively surface tension of ideal uniform unanimity; In addition, Yarn tension adjustment piece of the present utility model also possesses advantages such as quality is little, low cost of manufacture, easy replacing.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the utility model embodiment mounting structure schematic diagram in actual applications.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 2, this Yarn tension adjustment piece, comprise the elasticity frustum of a cone sheet 1 with almost circular larger diameter end 11, horizontal part 3 with almost circular smaller diameter end 31, connect elasticity frustum of a cone sheet 1 and horizontal part 3 along the continuous support member 2 of circumference;
Wherein, whole Yarn tension adjustment piece is the center structure that is centrosymmetric with the central shaft Y1 of described elasticity frustum of a cone sheet 1;
The part inner surface of described elasticity frustum of a cone sheet 1 forms along the continuous tension adjustment face S of circumference;
Described support member 2 is that relative smaller diameter end 31 arches upward and the annular arc sections that forms laterally, and this annular centers of arc sections axle Y2 is positioned on the central shaft Y1 of described elasticity frustum of a cone sheet 1, and the arc radius R of this annular arc sections is 3mm;
Described support member 2 and the 1 tangent transition of elasticity frustum of a cone sheet make integral body more along sliding;
Described support member 2 is to cross along slipping over by one section roundlet arc 4 tangent to each other with horizontal part 3;
During actual installation, the storage yarn drum 5 of knitting yarn storage device is positioned at a side of elasticity frustum of a cone sheet 1, larger diameter end 11 is enclosed in outside the storage yarn drum 5, make unwinding is come out on the storage yarn drum 5 yarn can enter into the inside of elasticity frustum of a cone sheet 1, S has an effect with the tension adjustment face, the porcelain eye 6 that the cross section is the T type from inside to outside passes the small sircle hole that smaller diameter end 31 forms, last and installation chassis 7 fixes, and installation chassis 7 is provided with the circular pit 71 that a circle adapts with support member 2, so, support member 2 just just in time is trapped in the circular pit 71, and the centralized positioning of realization yarn adjustment sheet, by installation chassis 7 and to be set in the outer spring (not shown) of installation chassis 7 spacing in storage yarn drum 5 one sides, referring to Fig. 2 with Yarn tension adjustment piece;
Thereby the diameter D1 of larger diameter end 11 adapts with the diameter of storage yarn drum 5, and the height H that the diameter D2 of smaller diameter end 31 and the relative smaller diameter end 31 of the annular arc sections of support member 3 arch upward is that the diameter by porcelain eye 6 adapts, in the present embodiment, D1 is about 78mm, and D2 is about 8.2mm, and H is 2mm;
Preferably between 25~40mm, total height is 30mm to the total height of whole Yarn tension adjustment piece in the present embodiment;
Described elasticity frustum of a cone sheet 1, support member 2, roundlet arc 4 and horizontal part 3 have consecutive identical wall thickness δ, and this wall thickness δ is 0.2mm;
The cone angle alpha of described elasticity frustum of a cone sheet 1 is 90 °, and the inner surface of frustum of a cone sheet 1 carries out polishing, roughness Ra≤1.6, and simultaneously, the outer surface of support member 2 also carries out polishing, is convenient to match with the installation chassis 7 of band shape pit 71.