CN203513867U

CN203513867U - Lower pin special for four-roller large drafting spinning frame

Info

Publication number: CN203513867U
Application number: CN201320594508.XU
Authority: CN
Inventors: 郭明瑞; 唐国新; 谢春萍; 高卫东; 徐伯俊
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2013-09-25
Filing date: 2013-09-25
Publication date: 2014-04-02
Anticipated expiration: 2023-09-25

Abstract

The utility model discloses a lower pin special for a four-roller large drafting spinning frame. The section of the lower pin is in a T shape, the lower pin comprises a fixed vertical end (e), a curved face (d) and an upper surface, the length of the fixed vertical end (e) is 10mm, and the radius of the curved face (d) is 13.5mm. The upper surface comprises a platform (a) and an arc face (c) which are in transition through an inclined face (b). The included angle of the inclined face (b) and a horizontal face is 30 degrees, and the length of the platform (a) is 10mm. The overall length (f) of the forward stretching part of the lower pin is 12.5mm. New design combination is adopted in the lower pin, the platform area in the front of the lower pin is prolonged, the vertical face of the lower pin is shortened, the lower pin is more suitable for the four-roller drafting spinning frame, and resultant yarn quality can be improved.

Description

The special-purpose downside pin of a kind of four roller high-draft spinning frames

Technical field

The utility model relates to the special-purpose downside pin of a kind of four roller high-draft spinning frames.

Background technology

The drafter of fine spining machine substantially all adopts three roller double-apron draftings at present.Three row rollers form two draw zones, and proparea has a pair of apron to participate in drawing-off, so front draft zone is called apron draft district, back zone is simple roller draft.In front draft zone, because sliver does not substantially have the twist between speed change point and front roller, and between upper and lower apron, yarn is had to frictional force, so the drafting multiple of front draft zone can reach 20～60 times., owing to being simple roller draft, and there is more turn in Er first break draft district on rove bar, so drafting multiple is generally no more than 1.5 times.Four roller high-draft spinning frames adopt four tape drawing mechanisms, and middle two row rollers are all apron draft, and have increased a draw zone, can effectively improve total draft multiple, realize efficient, high-quality spinning.Owing to changing four roller drafts into, need the lower apron of two rows, descend like this setting angle of apron to need to redesign, and need to improve existing downside pin.

Utility model content

The utility model object is that the defect existing for prior art provides a kind of special-purpose downside pin that is applicable to four roller high-draft spinning frames.

The utility model for achieving the above object, adopt following technical scheme: the special-purpose downside pin of a kind of four roller high-draft spinning frames, its cross sectional shape is "T"-shaped, comprise fixing perpendicular curved surface and the upper surface of holding and being positioned at a side lower head, the length of described fixing perpendicular end is 10mm, and described curved surface is that radius is 13.5mm; Described upper surface comprises by the platform of chamfered transition and arc surface; The angle of described inclined-plane and horizontal plane is 30 °, and the length of platform is 10mm; The total length that protracts of downside pin is 12.5mm.

The beneficial effects of the utility model: shorten in a large number the length of the fixing perpendicular end of downside pin, can make to move behind the position of leather ring tension frame, can not contact with the fixing perpendicular end of downside pin again, create conditions for realizing the double tension bracket setting of four roller drafts.

Extend the design length of platform on a large scale, length than existing downside pin is long, make the expansion forward on a large scale of lower apron friction field, the in the situation that of pin in the large preshoot of cooperation, apron control range is increased, can effectively shorten length of floating area, fiber strip is realized more effectively and being controlled, be conducive to improve fine spining machine drafting multiple and yarn quality.

The transition inclined-plane of 30 ° can reduce the drop of platform and arc surface, the support force that descends like this apron to be subject to downside pin in when operation is larger, and apron is stronger to fiber strip operation control, when high drafting, can effectively guarantee the suffered drafting force of fiber, improve yarn evenness.

Accompanying drawing explanation

Fig. 1 structural representation of the present utility model;

Fig. 2 embodiment schematic diagram of the present utility model.

The specific embodiment

Described in Fig. 1 to Fig. 2, be the special-purpose downside pins of a kind of four roller high-draft spinning frames, its its fixing length of erecting end e is 10mm, and curved surface d is that radius is 13.5mm, and upper surface is comprised of platform a, inclined-plane b and arc surface c, passes through inclined-plane b transition between platform a and arc surface c; The angle of inclined-plane b and horizontal plane is 30 °; The length of platform a is 10mm; The total length f that protracts of downside pin is 12.5mm.

Shown in Fig. 2, four roller high-draft spinning frame drawing-off partial cross section figure of the present utility model have been installed.Each parts are as follows: front roller 1, downside pin 2, in a roller 3, lower apron 4, in two rollers 7, rear roller 8, rear roller 9, in iron rod 10 on two rollers, upper leather ring 11, upper pin 12, in iron rod 13, front leather roller 16 on a roller.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. the special-purpose downside pin of a roller high-draft spinning frame, its cross sectional shape is "T"-shaped, comprises fixing perpendicular curved surface (d) and the upper surface of holding (e) and being positioned at a side lower head, it is characterized in that, the length of described fixing perpendicular end (e) is 10mm, described curved surface (d) for radius be 13.5mm; Described upper surface comprises by the platform (a) of inclined-plane (b) transition and arc surface (c); Described inclined-plane (b) is 30 ° with the angle of horizontal plane, and the length of platform (a) is 10mm; The total length that protracts (f) of downside pin is 12.5mm.