CN2210903Y

CN2210903Y - Gear rack for textile

Info

Publication number: CN2210903Y
Application number: CN 95242607
Authority: CN
Inventors: 林吉曙
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-06
Filing date: 1995-01-06
Publication date: 1995-10-25
Anticipated expiration: 2005-01-06

Abstract

The utility model relates to a cylinder gear rack for textile machinery. The utility model is composed of a base part and a toothed edge, wherein, the base part is provided with edges, and the toothed edge is arranged on the base part. The front face of the toothed edge has a straight-line negative-angle circular arc shape which is formed by straight line segments and a circular arc segment, wherein, each of the straight line segments forms a working angle of 77 to 83 DEG (namely a front angle ranges from 7 DEG to 13 DEG) with the base line of the base part, and the circular arc segment is connected with the straight line segments. The back side of the toothed edge has a straight-line circular arc shape which is formed by the straight line segments and the circular arc segment, wherein, each of the straight line segments forms a tooth back angle of 40 to 60 DEG with the base line of the base part, and the circular arc segment is connected with the straight line segments.

Description

Gear rack for textile

Though the utility model relates to particularly suitable but be not limited only to the cylinder tooth bar of bast fibre spinning machinery, also be cylinder metal needle cloth.

The cylinder tooth bar is a kind of important carding element in the textile machine, is called cylinder metal needle cloth again.Especially in ramie textile industry, because ramie fiber long staple, tension force is big, fiber crops cake degree of opening is poor, characteristics such as little bundle fiber is many, tooth bar at present commonly used is because of the profile of tooth reason, and it is strong and be unfavorable for branch comb fiber that its anterior angle in use becomes negative trend, and impels the crown passivation to quicken and be unfavorable for the fiber that punctures.In Chinese patent 91204218.4, once disclosed and a kind ofly had the cylinder tooth bar that the circular arc negative angle is directly carried on the back profile of tooth,, still had satisfactory not to the utmost part though certain improvement effect is arranged.

The purpose of this utility model is to provide profile of tooth more reasonable for addressing the above problem, and the experiment proved that the cylinder tooth bar of better effects if, also can have the advantage that cooperates wide ranges simultaneously.Though it can be preferentially and particularly suitable but be not only for being used for ramie textile industry.

Cylinder tooth bar of the present utility model is made of base portion that has seamed edge and the tooth portion on it.The straightway of the operating angle (promptly 7 °～13 ° anterior angles) that becomes 77 °～83 ° with the base portion baseline is served as reasons with circular-arc with its continuous straight line negative angle that arc section became in its tooth portion front; Rear flank serve as reasons the straightway that becomes 40～60 ° of Clearance angles with the base portion baseline with its continuous Straight Line and Arc shape that arc section became.In this profile of tooth, between two arc sections of front flank and rear flank, can do directly to be connected continuously, also can be connected mutually through the changeover portion of appropriate format.Here the said changeover portion that is connected continuously of being used for can also can be the arc section form with another suitable radius for its baseline the straightway form at suitable inclination angle being arranged.On this profile of tooth basis, according to the trend of present cylinder tooth bar, can a nearly step reduce tooth bar height overall and tooth depth to the exhibition of short tooth, shallow tooth and hair, for example the ratio with its height overall and tooth depth is controlled in 2.182～4.143 scopes best.

The service behaviour of above-mentioned cylinder tooth bar in ramie spinning experimentized, and effect is satisfied.Ramee is difficult for filling, and be easy to be gripped and combing by tooth bar, and crown is sharp, and card grinding or use back tooth top area Magnification are little, and anti-passivation ability is strong.The card stripping cycle of tooth bar and service life improve significantly.Use is the result show, numb net quality is good, clear height, and fiber crops grain rate reduces by 30%, and the runner doubling reduces by 38%, and the short fiber rate reduces about 4.8%, and row yielding also can slightly improve.Further reduce the inside pitch line length that rack teeth belongs to invalid combing district, can further help reducing fiber crops grain and impurity.The big advantage of another of the utility model tooth bar is supporting applied widely.Except that wires of doffs such as ZD-11, ZD-21 that can be special-purpose assorted with it, ZD-31 and corresponding work roll tooth bar, also can be used as other wires of doffs such as BD-21, RD-10 or XZD-01 and BW-722B, BW-722A, other working roll tooth bars such as RW101, XZW-1.2, effect is satisfactory equally.

Below with shown in the accompanying drawing, be that example to the above-mentioned subject area of the utility model is made qualification is described further but should not be construed as.

A kind of version of Fig. 1 the utility model cylinder tooth bar

The another kind of version of Fig. 2 the utility model cylinder tooth bar

Another version of Fig. 3 the utility model cylinder tooth bar

Example 1

As shown in Figure 1.This cylinder tooth bar is made of base portion 1 and the tooth portion on it.Tooth portion front is for circular-arc with the straight line negative angle that is become with its continuous arc section 5 by straightway 6, and straightway 6 is 77-83 ° with the operating angle that baseline became of base portion 1, for example can be 80 °, and the height of straightway 6 is 0.15～0.6 millimeter.The Straight Line and Arc shape of the tooth portion back side for being become with continuous with it arc section 3 by straightway 2, the Clearance angle that is become between the baseline of straightway 2 and base portion 1 is 40～60 °, for example can be 50 °.Become 20～35 ° by one with the baseline of base portion 1 between front flank arc section 5 and the rear flank arc section 3, the straight line segment type changeover portion 4 that for example can be 30 ° of inclinations is connected mutually.The height overall of tooth bar is 2.182～4.143 with the ratio of tooth depth; The wide ratio of tooth pitch and tooth bar base portion is 1.909～3.250.The height of teeth root of tooth bar is 0.1～0.4 millimeter.

Example 2

As shown in Figure 2.This cylinder tooth bar and example 1 structure difference only are directly to be connected no changeover portion structure continuously between front flank arc section 5 and the rear flank arc section 3.Remainder and example 1 are together.

Example 3

As shown in Figure 3.This cylinder tooth bar and example 1 structure do not exist together and only are before the tooth that the circular arc type changeover portion 4 through having another suitable radius is connected mutually between the arc section 5 and rear flank arc section 3.Remainder structure and example 1 are together.

Claims

1, the cylinder tooth bar of weaving usefulness, constitute by base portion that has seamed edge and the tooth portion on it, it is characterized in that tooth portion front is for circular-arc with the straight line negative angle that is become with its continuous arc section (5) by straightway (6), its straightway (6) is 77 °～83 ° with base portion (1) operating angle that baseline became, the tooth portion back side is that the Clearance angle between its straightway (2) and base portion (1) baseline is 40 °～60 ° by straightway (2) and the Straight Line and Arc shape that is become with its continuous arc section (3).

2, cylinder tooth bar as claimed in claim 1 is characterized in that the arc section (5) of said front flank directly is connected linking with rear flank arc section (3).

3, be connected mutually through a changeover portion (4) between the cylinder tooth bar as claimed in claim 1, the arc section (5) that it is characterized in that said front flank and rear flank arc section (3).

4, cylinder tooth bar as claimed in claim 3 is characterized in that said changeover portion (4) is for becoming the straightway of 20～35 ° of inclinations with base portion (1) baseline.

5, cylinder tooth bar as claimed in claim 3 is characterized in that said changeover portion (4) is another arc section.

6,, it is characterized in that its height overall and the ratio of tooth depth are 2.182～4.143 as the described cylinder tooth bar of one of claim 1 to 5.

7,, it is characterized in that the wide ratio of its tooth pitch and tooth bar base portion is 1.909～3.250 as the described cylinder tooth bar of one of claim 1 to 5.

8,, it is characterized in that its height of teeth root is 0.1～0.4 millimeter as the described cylinder tooth bar of one of claim 1 to 5.

9, as the described cylinder tooth bar of one of claim 1 to 5, the height that it is characterized in that its front flank straightway (6) is 0.15～0.6 millimeter.