CN1094534C - Four lever take-up mechanism for sewing machine - Google Patents
Four lever take-up mechanism for sewing machine Download PDFInfo
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- CN1094534C CN1094534C CN99113582A CN99113582A CN1094534C CN 1094534 C CN1094534 C CN 1094534C CN 99113582 A CN99113582 A CN 99113582A CN 99113582 A CN99113582 A CN 99113582A CN 1094534 C CN1094534 C CN 1094534C
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Abstract
The present invention provides a four-rod thread take-up mechanism for a sewing machine with 300 kinds of stitches, which is formed by hinging four components of a thread take-up crank (1), thread take-up rods (2), a thread take-up connecting rod (3) and a casing (4) and a shaft of a supporting point of the thread take-up connecting rod, namely a double end shaft of the thread take-up connecting rod. Compared with the maximum point position of retracting of the thread take-up tension rod (hole) of the prior art, the maximum point position of retracting of the thread take-up tension rod (hole) of the present invention is conspicuously 'rapid', so the needle thread tension of the sewing machine is reduced, and simultaneously, the time condition of feeding in advance is created for a feeding mechanism; the combined performance level of the sewing machine is enhanced. The four-rod thread take-up mechanism of the present invention can be matched with thread hooking mechanisms with 300 kinds of various stitches (comprising an oscillating shuttle, a horizontal rotating shuttle and a horizontal type rotating shuttle), and form the sewing machines of various purposes with other mechanisms.
Description
The present invention relates to make the thread take-up mechanism of 300 class chain stitch sewing machines.
The mechanism of at present making 300 class chain stitch sewing machines in the world is mainly by perverse material lead wires mechanism, string-hooking mechanism, and four great institutions such as thread take-up mechanism and feed mechanism are formed.Sewing machines will be finished the process of a stitching, mainly contains the eedle of perverse material lead wires mechanism, the shuttle of string-hooking mechanism (rotary shuttle or shuttle), and four critical parts such as the feeding tooth of the thread take-up tension lever of thread take-up mechanism and feed mechanism are finished in certain sequence.The effect of the thread take-up tension lever of thread take-up mechanism (hole) is supply and reclaim an amount of needlework in the stitching forming process, and the knot that needlework and shuttle thread are formed is taken out tight in the middle of sewing and replenished the needlework that each stitching is consumed.The thread take-up mechanism of Sewing machines has cam thread take-up mechanism, four lever take-up mechanism ... Deng.Four lever take-up mechanism has another name called connecting rod thread take-up mechanism (formal name used at school crank and rocker mechanism) and is made up of thread take-up crank (crank) thread take-up tension lever (connecting rod and connecting rod leading-off rods) line-choosing connecting rod (rocking bar) and casing four members such as (frames).Because it is wide that Sewing machines uses, so kind is a lot of, the linear pattern Sewing machines of home-use (also being suitable for the clothes workshop) has JA type and JB type two classes.The thread take-up mechanism of JA type Sewing machines is the cam thread take-up mechanism, and the thread take-up mechanism of JB type Sewing machines is a four lever take-up mechanism.Industrial middling speed (3000 pins/minute) and at a high speed the exhausted most kind of thread take-up mechanism of (the highest 5500 pins/minute) sewing machine for covering chain stitch be to select four lever take-up mechanism for use.The cam thread take-up mechanism only is applicable to low-speed running.Four lever take-up mechanism can be applicable to basic, normal, high speed running.The thread take-up tension lever operating position of above-mentioned two kinds of thread take-up mechanisms relatively; Thread take-up tension lever (hole) the take-up peak position of the cam thread take-up mechanism of JA type Sewing machines is in the four lever take-up mechanism [length l of the take-up rocking bar (3) of this mechanism of 58 ° of (is 0 ° with the eedle peak) JB type Sewing machiness
3=29 ± 0.105 (selecting from the ZBY17029 industry standard)] thread take-up tension lever (hole) take-up peak position at 67 °.The two is compared, the thread take-up tension lever of four lever take-up mechanism (hole) is than slow 9 ° of thread take-up tension lever (hole) the take-up peak position of cam thread take-up mechanism, be slow 9 ° of take-up time, its consequence is that the needlework tension force of its needlework tension force of the slow Sewing machines of the take-up Sewing machines faster than take-up is big.(the needlework tension force of Sewing machines is good with " little ".) so JA type Sewing machines be subjected to the user and welcome.Because middling speed, high-speed sewing Sewing machines are to adopt the four lever take-up mechanism [length l of the line-choosing connecting rod of this mechanism (3)
3=29.3 ± 0.05 (selecting from JIS B9083 standard)], therefore the extreme higher position of its thread take-up tension lever (hole) take-up also exists thread take-up tension lever (hole) problem of take-up time " slowly " at 68 °-69 °.
The purpose of this invention is to provide a kind of four lever take-up mechanism, it can make thread take-up tension lever (hole) in the peak position of take-up than the thread take-up tension lever (hole) of the four lever take-up mechanism of prior art in the peak position of take-up " soon ", can be approaching, reach, even surpass (less than) the numerical value boundary of 58 ° of the thread take-up tension lever peak positions of JA type Sewing machines cam thread take-up mechanism.
The object of the present invention is achieved like this: the technical program is the length l of thread take-up crank (1) on the basis of the four lever take-up mechanism of prior art
1, the length l of thread take-up tension lever (2)
2l
2 (2)Angle δ
2, the length l of line-choosing connecting rod (3)
3, the axis hole position coordinate l of casing (4) line-choosing connecting rod fulcrum
0l
0 (2)Four members such as (initial points " 0 " of the coordinate XY of the axis hole position of main shaft), and the angle δ of thread take-up crank OA and needle bar crank OA1
1With the line-choosing connecting rod fulcrum---line-choosing connecting rod axle (5-2) is transformed: the main points of its transformation are the length l with line-choosing connecting rod (3)
3Shorten, [be used for the Sewing machines that rotary shuttle colludes line style, (the length l of the line-choosing connecting rod of JIS B9038 standard code
3=29.3 ± 0.05) length l of the line-choosing connecting rod of the technical program (3)
3=26～15mm; Be used for the Sewing machines that shuttle colludes line style, (the length l of the take-up rocking bar of ZBY17029 China industry standard regulation
3=29 ± 0.105) length l of the line-choosing connecting rod of the technical program (3)
3=25～17.5mm.] (the axis hole position of challenge connecting rod pivot) coordinate l of the casing (4) that adheres to specification
0l
0 (2), with existing thread take-up tension lever (2) or to the length l of thread take-up tension lever (2)
2l
2 (2)With angle δ
2Make necessary adjusted thread take-up tension lever, and adjust angle δ
1And the length l of thread take-up crank (1)
1, make it meet in the scope of " thread take up lever stroke " regulation or reach better " thread take up lever stroke ".Improved four lever take-up mechanism reaches " design " and requires in result of calculation.If " casing (4) coordinate l
0l
0 (2)" the axis hole position of line-choosing connecting rod axle and the locus of thread take-up crank not enough, therefore must tighten improvement to related components, particularly the line-choosing connecting rod axle is fixed on one section axle on the casing and the size of chassis hole is dwindled.The related components of some kind tightens very much, does not almost tighten room for improvement, thereby can't implement.The three kinds of patterns of A type, Type B, C type that designed line-choosing connecting rod double-headed shaft (5-1) in the technical program again replace line-choosing connecting rod axle (5-2) to solve the not enough key issue in the position on the casing.The line-choosing connecting rod double-headed shaft is by the line-choosing connecting rod fulcrum---and two spindle noses of front axle and rear axle are formed, two parallel, two at a distance of " a " (a 〉=0) size, rear axle is installed in the position of casing any appropriate, (perhaps in the casing axis hole position of the high speed parallel sewing machine of prior art, make it that the apron space of thread take-up crank be arranged, its bulk is R26) guarantee the coordinate l that the coordinate of front axle adheres to specification
0l
0 (2)The axis hole of front axle and line-choosing connecting rod (3) hinge that matches.Above-mentioned improved four lever take-up mechanism is the technical program.The technical program can supportingly be used for the Sewing machines of each kind.Thread take-up tension lever (hole) than the Sewing machines of prior art has significantly " soon " in the peak position of take-up in the peak position of take-up with the supporting Sewing machines thread take-up tension lever (hole) of the technical program.The needlework tension force of Sewing machines can be reduced, also created the time conditions that can shift to an earlier date feeding simultaneously for feed mechanism; Owing to can shift to an earlier date feeding, i.e. feeding in advance finishes, and has played variation on the function of mechanism, and can have ready conditions reduces needle bar stroke, perhaps can increase the thick ability of seam under existing needle bar stroke condition.Therefore to have needlework tension force little with the supporting Sewing machines of the technical program, and feeding is refreshing, increases advantages such as the thick ability of seam, has improved the combination property level of Sewing machines.
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is the mechanism and thread take-up tension lever (P) the movement locus figure of four lever take-up mechanism.
Fig. 2 is a structural representation of the present invention.Fig. 3 is the left view of Fig. 2.
Fig. 4 is the A-A cutaway view among Fig. 3.Fig. 5 be among Fig. 4 to view.
Fig. 6-the 8th, the line-choosing connecting rod double-headed shaft A type of the technical program, Type B, three kinds of pattern figure of C type.
Fig. 9 is the prior art constructions schematic diagram.Figure 10 is the left view of Fig. 9.
1. thread take-up cranks, 2. thread take-up tension levers, 3. line-choosing connecting rods, 4. casing 5-1. line-choosing connecting rod double-headed shaft 5-2. line-choosing connecting rod axles, 6. axle sleeves, 7. main shafts, 8. needle bar cranks, 9. needle bearings, 10. not-go-end screws among the figure
In Fig. 1, this figure is the mechanism principle figure of four lever take-up mechanism and the movement locus of thread take-up tension lever (P).Thread take-up crank (1) (formal name used at school: OA length crank), code name l
1Thread take-up tension lever (2) it by connecting rod AB length, code name l
2, the leading-off rods of connecting rod is the operate portions BP length of thread take-up tension lever, code name l
2 (2)With thread take-up tension lever angle ∠ ABP, code name δ
2Form Deng three parts, P is the working hole of thread take-up tension lever; Line-choosing connecting rod (3) (formal name used at school: CB length code name l rocking bar)
3(formal name used at school: its coordinate of dot center of line-choosing connecting rod frame) (3) is l to casing (4)
0l
0 (2).0 axle position center its coordinate XY that is main shaft is " 0 "; AA1 is a needle bar crank, and its active length is OA1, δ
1It is the angle between thread take-up crank (1) and the needle bar crank (OA1).Thread take up lever stroke is the distance of thread take-up tension lever hole (P) from lowest point to the peak position, its code name ∑ PY.
In Fig. 2,3, thread take-up crank (1) is installed in main shaft (7) and upward fixes with dog screw and clench nail, main shaft is in axle sleeve (6), axle sleeve is installed in the casing (4), the rear end axle of needle bar crank (8) is fixed in the hole of thread take-up crank (1), it stretches out the axle journal that partly becomes thread take-up crank, and the axis hole of thread take-up tension lever (2) is contained on the axle journal of this thread take-up crank.In the cooperating of the axle journal of thread take-up tension lever axis hole and thread take-up crank, needle bearing (9) is housed also in the kind of high speed parallel sewing machine.The rear axle of line-choosing connecting rod double-headed shaft (5-1) is fixed on the casing (4), and the axis hole of front axle and thread take-up crank (3) is hinge mutually, and the end of front axle is fastening with not-go-end screw (10), prevents thread take-up crank (3) axial displacement.The axle of thread take-up crank (3) and the axis hole of thread take-up tension lever (2) be hinge mutually.
In Fig. 4,5, line-choosing connecting rod double-headed shaft (5-1) is fixed on the situation on the casing (4).The line-choosing connecting rod double-headed shaft is by the line-choosing connecting rod fulcrum---and two spindle noses of front axle and rear axle are formed, two parallel, two at a distance of " a " (a 〉=0) size, rear axle is installed in the position (hole) of casing any appropriate, perhaps in the casing axis hole position of prior art, make it that the apron space of thread take-up crank be arranged, for example the thread take-up crank apron space of the high speed parallel sewing machine casing of prior art is of a size of R26; The coordinate l of line-choosing connecting rod fulcrum---front axle
0l
0 (2)The coordinate that should adhere to specification.L ' in Fig. 5
0L '
0 (2)Be the coordinate size of the position of casing any appropriate, l
0l
0 (2)Be the coordinate size of designing requirement, a be two on front axle and rear axle apart from size.
In the technical program was calculated, the coordinate of line-choosing connecting rod fulcrum---front axle was equivalent to the casing coordinate of prior art.
In Fig. 6-8, be three kinds of pattern figure of A type, Type B, C type of the line-choosing connecting rod double-headed shaft (5-1) of the technical program.The line-choosing connecting rod double-headed shaft is made up of front axle and rear axle.Rear axle is fixed on the casing; (JB type Sewing machines title: the hinge take-up rocking bar), front axle become the line-choosing connecting rod fulcrum, promptly become the oscillation center point of line-choosing connecting rod for front axle and line-choosing connecting rod.The A type of Fig. 6 is that the shaft centre line of front axle and two axles of rear axle (characteristics are that the size of rear axle can be dwindled) is a=0; The C type of the Type B of Fig. 7 and Fig. 8 is that the shaft centre line of front axle and two axles of rear axle is a＞0.Select it according to the design needs.
In Fig. 9,10, it is the four lever take-up mechanism of prior art, and line-choosing connecting rod axle (5-2) and line-choosing connecting rod (3) axis hole be hinge mutually, and the line-choosing connecting rod axle is fixed on the casing (4).All the other parts and requirement and Fig. 2,3 consistent.(thread take-up tension lever (2) used of two-needle sewing machine has two holes, P hole and Q hole.)
The technical program can be applicable in the 300 class chain stitch sewing machines, because the kind of such Sewing machines is a lot of, now representational kind: 1. high speed parallel sewing machine and medium speed flat bed sewing machine, 2. thick material flat seam machine in the big rotating shuttle, 3. multi-purpose sewing machine, 4. embroidery sewing machine, 5. two-needle sewing machine, 6.JB the type Sewing machines, 7. seven typical species such as multifunctional domestic Sewing machines compare and use.
High speed parallel sewing machine and medium speed flat bed sewing machine are by the perpendicular insertion material, and four lever take-up mechanism take-up, rotary shuttle collude line, form the Sewing machines of 301 stitchings, are the main sewing devices of clothes factory.The structure of the four lever take-up mechanism of high speed parallel sewing machine and medium speed flat bed sewing machine is basic identical, and difference is in the bearing portion of thread take-up tension lever, select needle bearing in the high speed parallel sewing machine for use, and medium speed flat bed sewing machine is without needle bearing.Slightly different in technical parameter.Below with the structure of the four lever take-up mechanism of the high speed parallel sewing machine of prior art and medium speed flat bed sewing machine and technical parameter with result of calculation structure and the technical parameter with the four lever take-up mechanism of this skill scheme, particularly line-choosing connecting rod l
3Size compared with result of calculation from 14 embodiment examples such as ten size compositions such as 26 2,524 22 20 19 18 17 16 15 grades.
Four lever take-up mechanism numbering 1-0-1 unit: the mm " as follows " of the high speed parallel sewing machine of prior art
Technical parameter: l
0=18.4 l
0 (2)=26.74 l
1=14.5 l
2=25 l
2 (2)=35.7 δ
2=122 ° of l
3=29.3 δ
1=27.87 ° are calculated.(starting point of this calculating is taken at thread take-up crank and vertical direction angle δ
1The angle place is θ
1=0 ° this moment eedle be in the extreme higher position.) " as follows "
Result of calculation:
Thread take-up tension lever (P) peak θ
1=69 ° of PX 39.614 PY 54.977
Thread take-up tension lever (P) minimum point θ
1=303 ° of PX 38.583 PY-4.51
Thread take-up tension lever (P) stroke ∑ PY 59.487mm
The four lever take-up mechanism numbering 1-0-2 of the medium speed flat bed sewing machine of prior art
Technical parameter: l
0=18.8 l
0 (2)=26.3 l
1=14.7 l
2=25 l
2 (2)=35 δ
2=126 ° of l
3=29.3 δ
1=30.212284 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=68 ° of PX 36.621 PY 57.618
Thread take-up tension lever (P) minimum point θ
1=305 ° of PX 38.903 PY-2.063
Thread take-up tension lever (P) stroke ∑ PY 59.681mm
The four lever take-up mechanism numbering 1-1 of the technical program
Technical parameter: l
0=13.7 l
0 (2)=26.02 l
1=14.5 l
2=25 l
2 (2)=34 δ
2=126 ° of l
3=26 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=66 ° of PX 38.578 PY 55.024
Thread take-up tension lever (P) minimum point θ
1=306 ° of PX 37.97 PY-4.461
Thread take-up tension lever (P) stroke ∑ PY 59.485mm
The four lever take-up mechanism numbering 1-2 of the technical program
Technical parameter: l
0=12.8 l
0 (2)=25.83 l
1=14.5 l
2=25 l
2 (2)=34 δ
2=126 ° of l
3=25 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=65 ° of PX 38.103 PY 55.364
Thread take-up tension lever (P) minimum point θ
1=307 ° of PX 38.019 PY-4.121
Thread take-up tension lever (P) stroke ∑ PY 59.485mm
The four lever take-up mechanism numbering 1-3 of the technical program
Technical parameter: l
0=11.8 l
0 (2)=25.7 l
1=14.5 l
2=25 l
2 (2)=34 δ
2=126 ° of l
3=24 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=64 ° of PX 37.808 PY 55.577
Thread take-up tension lever (P) minimum point θ
1=307 ° of PX 38.044 PY-3.909
Thread take-up tension lever (P) stroke ∑ PY 59.486mm
The four lever take-up mechanism numbering 1-4 of the technical program
Technical parameter: l
0=7.5 l
0 (2)=27.42 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=22 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=62 ° of PX 42.459 PY 56.045
Thread take-up tension lever (P) minimum point θ
1=306 ° of PX 41.213 PY-3.441
Thread take-up tension lever (P) stroke ∑ PY 59.486mm
The four lever take-up mechanism numbering 1-5 of the technical program
Technical parameter: l
0=5.2 l
0 (2)=27.4 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=20 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=60 ° of PX 42.025 PY 56.33
Thread take-up tension lever (P) minimum point θ
1=309 ° of PX 41.291 PY-3.163
Thread take-up tension lever (P) stroke ∑ PY 59.493mm
The four lever take-up machine bar numbering 1-6 of the technical program
Technical parameter: l
0=4 l
0 (2)=27.42 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=19 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=59 ° of PX 41.791 PY 56.478
Thread take-up tension lever (P) minimum point θ
1=310 ° of PX 41.331 PY-3.021
Thread take-up tension lever (P) stroke ∑ PY 59.499mm
The four lever take-up mechanism numbering 1-7 of the technical program
Technical parameter: l
0=6.8 l
0 (2)=27.10 l
1=14.5 l
2=26 l
2 (2)=37.8 δ
2=118 ° of l
3=19 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=63 ° of PX 42.588 PY 54.428
Thread take-up tension lever (P) minimum point θ
1=309 ° of PX 40.301 PY-4.570
Thread take-up tension lever (P) stroke ∑ PY 59.498mm
The four lever take-up mechanism numbering 1-8 of the technical program
Technical parameter: l
0=6.2 l
0 (2)=27.27 l
1=14.5 l
2=26 l
2 (2)=35.8 δ
2=118 ° of l
3=19 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=63 ° of PX 41.978 PY 53.094
Thread take-up tension lever (P) minimum point θ
1=310 ° of PX 38.525 PY-4.315
Thread take-up tension lever (P) stroke ∑ PY 57.409mm
The four lever take-up mechanism numbering 1-9 of the technical program
Technical parameter: l
0=4.5 l
0 (2)=27.32 l
1=14.7 l
2=28 l
2 (2)=35 δ
2=120 ° of l
3=19 δ
1=30.212284 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=59 ° of PX 40.228 PY 56.359
Thread take-up tension lever (P) minimum point θ
1=311 ° of PX 39.892 PY-3.329
Thread take-up tension lever (P) stroke ∑ PY 59.688mm
The four lever take-up mechanism numbering 1-10 of the technical program
Technical parameter: l
0=4.5 l
0 (2)=27.2 l
1=14.7 l
2=28 l
2 (2)=33 δ
2=120 ° of l
3=19 δ
1=30.212284 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=58 ° of PX 38.173 PY 55.62
Thread take-up tension lever (P) minimum point θ
1=310 ° of PX 38.173 PY-2.405
Thread take-up tension lever (P) stroke ∑ PY 58.025mm
The four lever take-up machine bar numbering 1-11 of the technical program
Technical parameter: l
0=2.5 l
0 (2)=27.5 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=18 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=58 ° of PX 42.049 PY 56.232
Thread take-up tension lever (P) minimum point θ
1=312 ° of PX 41.363 PY-3.244
Line bar (P) stroke ∑ PY 59.476mm
The four lever take-up mechanism numbering 1-12 of the technical program
Technical parameter: l
0=1.5 l
0 (2)=27.55 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=17 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=55 ° of PX 41.040 PY 56.866
Thread take-up tension lever (P) minimum point θ
1=313 ° of PX 41.470 PY-2.638
Thread take-up tension lever (P) stroke ∑ PY 59.504mm
The four lever take-up mechanism numbering 1-13 of the technical program
Technical parameter: l
0=0 l
0 (2)=27.69 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=16 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=52 ° of PX 40.764 PY 56.869
Thread take-up tension lever (P) minimum point θ
1=315 ° of PX 41.533 PY-2.629
Thread take-up tension lever (P) stroke ∑ PY 59.501mm
The four lever take-up mechanism numbering 1-14 of the technical program
Technical parameter: l
0=-1.5 l
0 (2)=27.91 l
1=14.5 l
2=28 l
2 (2)=35.7 δ
2=122 ° of l
3=15 δ
1=27.87 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=48 ° of PX 40.035 PY 57.086
Thread take-up tension lever (P) minimum point θ
1=318 ° of PX 41.733 PY-2.398
Thread take-up tension lever (P) stroke ∑ PY 59.484mm
Show from the result of calculation of above-mentioned numbering 1-0-1～2 and 1-1～14: numbering 1-0-1 be thread take-up tension lever (P) the take-up peak position of high speed parallel sewing machine four lever take-up mechanism of prior art at 69 °, lowest point is at 303 °; Numbering 1-02 be four lever take-up mechanism (P) the take-up peak position of the medium speed flat bed sewing machine of prior art at 68 °, lowest point is at 305 °.Numbering 1-1-14 has set forth line-choosing connecting rod l among 14 embodiment of four lever take-up machine bar of the technical program
3The result of calculation of size in each example of 26,25,24,22,19,18,17,16,15, its thread take-up tension lever (P) take-up peak position and lowest point; (1-1) 66 °, 306 °.(1-2)65°，307°。(1-3)64°，307°。(1-4)62°，306°。(1-5)60°，309°。(1-6)59°，310°。(1-7)63°，309°。(1-8)63°，310°。(1-9)59°，311°。(1-10)58°，310°。(numbering 1-6-10 selects l for use
3=19 with select other different technical parameter for use, the various thread take up lever stroke ∑ PY that obtain.)(1-11)58°，312°。(1-12)55°，313°。(1-13)52°，315°。(1-14)48°，318°。
The derivatives that thick material flat seam machine is a medium speed flat bed sewing machine in the big rotating shuttle, its main characteristics is: the bobbin thread amount in the big rotating shuttle is a times of common rotating shuttle line amount.Below compared with result of calculation with the structure of the four lever take-up mechanism of thick material flat seam machine in the big rotating shuttle of prior art and technical parameter structure and technical parameter with the four lever take-up mechanism of result of calculation and the technical program.
The thread take-up mechanism of thick material flat seam machine numbering 2-0 in the big rotating shuttle of prior art
Technical parameter: l
0=19 l
0 (2)=26.3 l
1=15 l
2=25 l
2 (2)=45 δ
2=124.436 ° of l
3=28.9 δ
1=27.21 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=69 ° of PX 44.168 PY 64.192
Thread take-up tension lever (P) minimum point θ
1=304 ° of PX 47.173 PY-6.591
Thread take-up tension lever (P) stroke ∑ PY 70.783mm
The four lever take-up mechanism numbering 2-1 of the technical program
Technical parameter: l
0=5.7 l
0 (2)=27.41 l
1=15 l
2=28 l
2 (2)=45 δ
2=124.436 ° of l
3=24 δ
1=27.21 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=60 ° of PX 47.541 PY 64.381
Thread take-up tension lever (P) minimum point θ
1=311 ° of PX 49.732 PY-6.4
Thread take-up tension lever (P) stroke ∑ PY 70.781mm
Show from the result of calculation of above-mentioned numbering 2-0 and 2-1: the peak position of thread take-up tension lever (P) take-up of the four lever take-up mechanism of thick material flat seam machine is at 69 ° the big rotating shuttle of numbering 2-0 prior art, and lowest point is at 304 °; The peak position of thread take-up tension lever (P) take-up of the four lever take-up mechanism of numbering 2-1 the technical program is at 60 °, and lowest point is at 311 °.
Multi-purpose sewing machine is to spend mould control shank horizontal reciprocally swinging thorn material and horizontal rotating shuttle to collude line by cam, forms straight shape linear slit or decoration flower shape linear slit, the four lever take-up mechanism of the identical flat seam machine of its thread take-up mechanism.Below compared with result of calculation with the structure of the thread take-up mechanism of existing multi-purpose sewing machine and technical parameter structure and technical parameter with the four lever take-up mechanism of result of calculation and the technical program.
The four lever take-up mechanism numbering 3-0 of the multi-purpose sewing machine of prior art
Technical parameter: l
0=18.8 l
0 (2)=26 l
1=14.1 l
2=23.5 l
2 (2)=33.28 δ
2=126.939 ° of l
3=31 δ
1=35.64888 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=79 ° of PX 39.088 PY 51.905
Thread take-up tension lever (P) minimum point θ
1=315 ° of PX 36.166 PY-7.293
Thread take-up tension lever (P) stroke ∑ PY 59.198mm
The four lever take-up machine bar numbering 3-1 of the technical program
Technical parameter: l
0=7.3 l
0 (2)=27.49 l
1=15.6 l
2=27 l
2 (2)=33.28 δ
2=118 ° of l
3=19.5 δ
1=35.3075 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=63 ° of PX 36.144 PY 56.771
Thread take-up tension lever (P) minimum point θ
1=314 ° of PX 36.129 PY-2.421
Thread take-up tension lever (P) stroke ∑ PY 59.192mm
The four lever take-up mechanism numbering 3-2 of the technical program
Technical parameter: l
0=7.3 l
0 (2)=27.49 l
1=15.6 l
2=27 l
2 (2)=33.28 δ
2=118 ° of l
3=19.5 δ
1=32.3516 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=60 ° of PX 36.142 PY 56.770
Thread take-up tension lever (P) minimum point θ
1=311 ° of PX 36.128 PY-2.422
Thread take-up tension lever (P) stroke ∑ PY 59.192mm
The four lever take-up mechanism numbering 3-3 of the technical program
Technical parameter: l
0=3.5 l
0 (2)=28.27 l
1=15.6 l
2=28 l
2 (2)=33.28 δ
2=118 ° of l
3=17.5 δ
1=32.3516 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=57 ° of PX 36.855 PY 57.137
Thread take-up tension lever (P) minimum point θ
1=315 ° of PX 37.091 PY-2.056
Thread take-up tension lever (P) stroke ∑ PY 59.193mm
Show from the result of calculation of above-mentioned numbering 3-0 and 3-1～3: numbering 3-0 be thread take-up tension lever (P) the take-up peak position of multi-purpose sewing machine four lever take-up mechanism of prior art at 79 °, lowest point is at 315 °; Numbering 3-1-3 is that three case study on implementation of the four lever take-up mechanism of the technical program have been set forth line-choosing connecting rod l
3The result of calculation of size 19.5,17.5, its thread take-up tension lever (P) take-up peak position and lowest point: (3-1) 63 °, 314 °.(3-2)60°，311°。(3-3)57°，315°。
Embroidery sewing machine is that perverse material of the horizontal reciprocally swinging of shank and horizontal rotating shuttle collude line, forms straight shape linear slit or width " Z " font linear slit not of uniform size.Two classes that the vertical feeding of feed mechanism feeding and manual manipulation is arranged.The four lever take-up mechanism of the identical flat seam machine of its thread take-up mechanism.Below compared with result of calculation with the structure of the thread take-up mechanism of the embroidery sewing machine of prior art and technical parameter structure and technical parameter with the four lever take-up mechanism of result of calculation and the technical program.
The four lever take-up machine numbering 4-0 of the embroidery sewing machine of prior art
Technical parameter: l
0=18.54 l
0 (2)=26.46 l
1=15.32 l
2=25 l
2 (2)=33.91 δ
2=124.34 ° of l
3=29.22 δ
1=28.2956 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=65 ° of PX 36.175 PY 57.019
Thread take-up tension lever (P) minimum point θ
1=304 ° of PX 36.719 PY-4.061
Thread take-up tension lever (P) stroke ∑ PY 61.08mm
The four lever take-up mechanism numbering 4-1 of the technical program
Technical parameter: l
0=6.6 l
0 (2)=27.37 l
1=15.32 l
2=28 l
2 (2)=33.91 δ
2=124.34 ° of l
3=21 δ
1=28.2956 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=58 ° of PX 38.166 PY 58.807
Thread take-up tension lever (P) minimum point θ
1=309 ° of PX 39.526 PY-2.275
Thread take-up tension lever (P) stroke ∑ PY 61.082mm
Show from the result of calculation of above-mentioned numbering 4-0 and 4-1: the peak position of thread take-up tension lever (P) take-up of the four lever take-up mechanism of the embroidery sewing machine of numbering 4-0 prior art is at 65 °, and lowest point is at 304 °.Thread take-up tension lever (P) the take-up peak position of the four lever take-up mechanism of numbering 4-1 the technical program is at 58 °, and lowest point is at 309 °.
Two-needle sewing machine is the Sewing machines of two pieces of eedles and two horizontal rotary hooks, and its thread take-up tension lever has two holes, and two needlework pass two holes respectively, carry out sewing operation.The four lever take-up mechanism of two-needle sewing machine duplicates in the four lever take-up mechanism of flat seam machine.Below compared with result of calculation with the structure of the two-needle sewing machine four lever take-up mechanism of prior art and technical parameter structure and technical parameter with the four lever take-up mechanism of result of calculation and the technical program.
The four lever take-up mechanism numbering 5-0 of the two-needle sewing machine of prior art
Technical parameter: l
0=16.2 l
0 (2)=28.3 l
1=14.2 l
2=25 l
2 (2) P=39 l
2 (2) Q=39 δ
2P=129.48 ° of δ
2Q=121.39 ° of l
3=28.8 δ
1=16.99 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=63 ° of PX 43.518 PY 57.579
Thread take-up tension lever (P) minimum point θ
1=297 ° of PX 43.974 PY-2.703
Thread take-up tension lever (P) stroke ∑ PY 60.282mm
Thread take-up tension lever (Q) peak θ
1=65 ° of QX 46.294 QY 52.91
Thread take-up tension lever (Q) minimum point θ
1=296 ° of QX 41.351 QY-7.539
Thread take-up tension lever (Q) stroke ∑ QY 60.449mm
The four lever take-up mechanism numbering 5-1 of the technical program
Technical parameter: l
0=2.6 l
0 (2)=28.17 l
1=14.2 l
2=28 l
2 (2) P=39 l
2 (2) Q=39.4 δ
2P=129.48 ° of δ
2Q=121.39 ° of l
3=20 δ
1=16.99 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=57 ° of PX 40.011 PY 56.736
Thread take-up tension lever (P) minimum point θ
1=305 ° of PX 46.751 PY-3.541
Thread take-up tension lever (P) stroke ∑ PY 60.277mm
Thread take-up tension lever (Q) peak θ
1=58 ° of QX 51.663 QY 51.855
Thread take-up tension lever (Q) minimum point θ
1=304 ° of QX 44.103 QY-8.430
Thread take-up tension lever (Q) stroke ∑ QY 60.285mm
Show from the result of calculation of above-mentioned numbering 5-0 and 5-1: the peak position of first hole of thread take-up tension lever (P) take-up of the two-needle sewing machine four lever take-up mechanism of numbering 5-0 prior art is at 63 °, and lowest point is at 297 °.The peak position of second hole (Q) take-up is at 65 °, and lowest point is at 296 °.The peak position of first hole of thread take-up tension lever (P) take-up of the four lever take-up mechanism of numbering 5-1 the technical program is at 57 °, and lowest point is at 305 °.The peak position of second hole (Q) take-up is at 58 °, and lowest point is at 304 °.
JB type Sewing machines is the Sewing machines that use at family or small-sized clothes workshop.It is the perverse material of staight needle, and shuttle colludes line, and four lever take-up mechanism is for line, and take-up forms straight shape linear slit.The thread take-up tension lever of the four lever take-up mechanism of this machine (hole) take-up peak position is than thread take-up tension lever (hole) the take-up peak position " slowly " of the cam thread take-up mechanism of JA type Sewing machines.The purpose of the technical program is exactly thread take-up tension lever (hole) the take-up peak position " soon " that will make four lever take-up mechanism, can be approaching, reach, even surpass (less than) the numerical value boundary of thread take-up tension lever (hole) the take-up peak position " 58 ° " of the cam thread take-up mechanism of JA type Sewing machines.Below the structure of the JB type Sewing machines four lever take-up mechanism of usefulness prior art and technical parameter are with the structure and the technical parameter of the four lever take-up mechanism of result of calculation and this machine art scheme, particularly with line-choosing connecting rod l
3Size from 25,24, seven sizes such as 23,21.5,20,19,17.5 grades are compared with result of calculation with embodiment example of each size composition respectively.
The JB type Sewing machines four lever take-up mechanism numbering 6-0 of prior art
Technical parameter: l
0=19 l
0 (2)=26 l
1=17 l
2=24.8 l
2 (2)=33.5 δ
2=125 ° of l
3=29 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=67 ° of PX 32.517 PY 60.642
Thread take-up tension lever (P) minimum point θ
1=312 ° of PX 34.245 PY-6.691
Thread take-up tension lever (P) stroke ∑ PY 67.333mm
The four lever take-up mechanism numbering 6-1 of the technical program
Technical parameter: l
0=14.5 l
0 (2)=25.82 l
1=17 l
2=24.8 l
2 (2)=33.5 δ
2=125 ° of l
3=25 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=64 ° of PX 32.255 PY 60.840
Thread take-up tension lever (P) minimum point θ
1=315 ° of PX 34.256 PY-6.507
Thread take-up tension lever (P) stroke ∑ PY 67.347mm
The four lever take-up mechanism numbering 6-2 of the technical program
Technical parameter: l
0=13.7 l
0 (2)=25.6 l
1=17 l
2=24.8 l
2 (2)=33.5 δ
2=125 ° of l
3=24 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=63 ° of PX 31.282 PY 61.347
Thread take-up tension lever (P) minimum point θ
1=315 ° of PX 34.352 PT-5.977
Thread take-up tension lever (P) stroke ∑ PY 67.324mm
The four lever take-up mechanism numbering 6-3 of the technical program
Technical parameter: l
0=11.4 l
0 (2)=26.15 l
1=17 l
2=26 l
2 (2)=33.5 δ
2=125 ° of l
3=23 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=62 ° of PX 32.264 PY 61.998
Thread take-up tension lever (P) minimum point θ
1=316 ° of PX 35.505 PY-5.338
Thread take-up tension lever (P) stroke ∑ PY 67.336mm
The four lever take-up mechanism numbering 6-4 of the technical program
Technical parameter: l
0=9 l
0 (2)=26.58 l
1=17 l
2=27 l
2 (2)=33.5 δ
2=125 ° of l
3=21.5 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=59 ° of PX 31.839 PY 63.155
Thread take-up tension lever (P) minimum point θ
1=316 ° of PX 36.55 PY-4.177
Thread take-up tension lever (P) stroke ∑ PY 67.332mm
The four lever take-up mechanism numbering 6-5 of the technical program
Technical parameter: l
0=7 l
0 (2)=26.55 l
1=17 l
2=27 l
2 (2)=33 δ
2=120 ° of l
3=20 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=57 ° of PX 32.360 PY 60.870
Thread take-up tension lever (P) minimum point θ
1=317 ° of PX 34.451 PY-6.468
Thread take-up tension lever (P) stroke ∑ PY 67.338mm
The four lever take-up mechanism numbering 6-6 technical parameter of the technical program: l
0=5.5 l
0 (2)=26.76 l
1=17 l
2=27 l
2 (2)=33 δ
2=120 ° of l
3=19 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=55 ° of PX 32.206 PY 66.854
Thread take-up tension lever (P) minimum point θ
1=319 ° of PY 34.469 PY-6.472
Thread take-up tension lever (P) stroke ∑ PY 67.335mm
The four lever take-up mechanism numbering 6-7 of the technical program
Technical parameter: l
0=3 l
0 (2)=27.18 l
1=17 l
2=24.8 l
2 (2)=33 δ
2=120 ° of l
3=17.5 δ
1=34.682 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=51 ° of PX 31.790 PY 60.804
Thread take-up tension lever (P) minimum point θ
1=323 ° of PX 34.543 PY-6.504
Thread take-up tension lever (P) stroke ∑ PY 67.308mm
Show from the result of calculation of above-mentioned numbering 60 and 6-1～7: numbering 6-0 be thread take-up tension lever (P) the take-up peak position of JB type Sewing machines four lever take-up mechanism of prior art at 67 °, lowest point is at 312 °; Numbering 6-1～7th, seven embodiment examples of the four lever take-up mechanism of the technical program have been set forth line-choosing connecting rod l
3Size 25,24, its thread take-up tension lever of result of calculation (P) take-up peak position and lowest point in each example of 23,21.5,20,19,17.5: (6-1) 64 °, 315 °.(6-2)63°，315°。(6-3)62°，316°。(6-4)59°，316°。(6-5)57°，317°。(6-6)55°，319°。(6-7)51°，323°。
The multifunctional domestic Sewing machines is to collude line by cam flower mould perverse material of the control horizontal reciprocally swinging of shank and horizontal shuttle, forms straight shape linear slit or decoration flower shape linear slit, the four lever take-up mechanism of the identical JB type Sewing machines of its thread take-up mechanism.Below compared with result of calculation with the structure of the multifunctional domestic Sewing machines four lever take-up mechanism of prior art and technical parameter result and technical parameter with the four lever take-up mechanism of result of calculation and the technical program.
The multifunctional domestic Sewing machines four lever take-up mechanism numbering 7-0 of prior art
Technical parameter: l
0=18.9 l
0 (2)=25.4 l
1=18 l
2=25 l
2 (2)=33.5 δ
2=124.5 ° of l
3=29.5 δ
1=33.666667 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=64 ° of PX 31.995 PY 62.134
Thread take-up tension lever (P) minimum point θ
1=314 ° of PX 32.166 PY-11.214
Thread take-up tension lever (P) stroke ∑ PY73.348mm
The four lever take-up mechanism numbering 7-l of the technical program
Technical parameter: l
0=12.2 l
0 (2)=25.45 l
1=18 l
2=25 l
2 (2)=33.5 δ
2=124.5 ° of l
3=24 δ
1=31 ° are calculated.
Result of calculation:
Thread take-up tension lever (P) peak θ
1=58 ° of PX 32.078 PY 62.13
Thread take-up tension lever (P) minimum point θ
1=316 ° of PX 32.046 PY-11.227
Thread take-up tension lever (P) stroke ∑ PY 73.357mm (+0.009)
Show from the result of calculation of above-mentioned numbering 7-0 and 7-1: numbering 7-0 be thread take-up tension lever (P) the take-up peak position of four lever take-up mechanism of multifunctional domestic Sewing machines of prior art at 64 °, lowest point is at 314 °; Numbering 7-1 be thread take-up tension lever (P) the take-up peak position of the four lever take-up mechanism of the technical program at 58 °, lowest point is at 316 °.
Show from the analysis comparative result of above-mentioned seven typical species Sewing machiness:
The Sewing machines that the employing rotary shuttle of prior art colludes line style is (1-0-1-2) high-speed sewing (sewing) machine and middling speed flush joint (sewing) machine, (2-0) thick material flush joint (sewing) machine in the big rotating shuttle, (3-0) multi-purpose sewing machine, (4-0) embroidery sewing machine, (5-0) five kinds such as crosspointer flush joint (sewing) machine, the size of their line-choosing connecting rod (3) is respectively (1-0-1-2) l
3=29.3, (2-0) l
3=28.9, (3-0) l
3=31, (4-0) l
3=29.22, (5-0) l
3=28.8; The Sewing machines that adopts shuttle to collude line style is (6-0) JB type Sewing machines, (7-0) two kinds such as multifunctional domestic Sewing machines, and their line-choosing connecting rod (3) size is respectively (6-0) l
3=29, (7-0) l
3=29.5.
The employing rotary shuttle of the technical program colludes the size l of the used line-choosing connecting rod (3) of five typical species of line style Sewing machines
3=26～15 altogether examples 20 embodiment examples; Adopt shuttle to collude the size l of the used line-choosing connecting rod (3) of two typical species of line style Sewing machines
3=25～17.5 altogether examples eight embodiment examples.
Because can be without departing from the spirit and scope of the present invention and work out the four lever take-up mechanism of the technical program and the string-hooking mechanism of various 300 class stitchings (comprises shuttle, horizontal rotary hook, horizontal rotary shuttle.) match, and the example of the various uses of other mechanism's composition.
Above-mentioned 300 class stitchings meet the classification and the term of G34514-84[stitching] regulation the stitching pattern.
Claims (2)
1. make the four lever take-up mechanism of a kind of use in sewing machine of 300 class stitchings, mainly form by hinges such as the axle of four members such as thread take-up crank (1) thread take-up tension lever (2) line-choosing connecting rod (3) casing (4) and line-choosing connecting rod fulcrum and main shafts, the axle that it is characterized in that the line-choosing connecting rod fulcrum is made up of front axle and two spindle noses of rear axle, two parallel formation line-choosing connecting rod double end parallel axes (5-1), the axis hole of its front axle and line-choosing connecting rod (3) is hinge mutually, rear axle is fixed on the casing (4), the axle of line-choosing connecting rod (3) and the axis hole of thread take-up tension lever (2) be hinge mutually, the axle journal of another axis hole of thread take-up tension lever (2) and thread take-up crank (1) is hinge mutually, and thread take-up crank (1) is fixed on the main shaft (7).
2. the four lever take-up mechanism of a kind of use in sewing machine according to claim 1, its spy is that the length of line-choosing connecting rod (3) is l
3=26～15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113582A CN1094534C (en) | 1998-04-08 | 1999-03-30 | Four lever take-up mechanism for sewing machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98110767.2 | 1998-04-08 | ||
| CN98110767 | 1998-04-08 | ||
| CN99113582A CN1094534C (en) | 1998-04-08 | 1999-03-30 | Four lever take-up mechanism for sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233680A CN1233680A (en) | 1999-11-03 |
| CN1094534C true CN1094534C (en) | 2002-11-20 |
Family
ID=25744670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99113582A Expired - Fee Related CN1094534C (en) | 1998-04-08 | 1999-03-30 | Four lever take-up mechanism for sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1094534C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451207C (en) * | 2002-09-19 | 2009-01-14 | 周鹤鸣 | Link lever thread take-rp mechanism for sewing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132757Y (en) * | 1992-08-25 | 1993-05-12 | 宁波市镇海压铸厂 | Take-up lever with circumferential slot nesting |
| CN1190140A (en) * | 1996-10-30 | 1998-08-12 | 重机公司 | Sewing machine with need thread take-up lever |
-
1999
- 1999-03-30 CN CN99113582A patent/CN1094534C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132757Y (en) * | 1992-08-25 | 1993-05-12 | 宁波市镇海压铸厂 | Take-up lever with circumferential slot nesting |
| CN1190140A (en) * | 1996-10-30 | 1998-08-12 | 重机公司 | Sewing machine with need thread take-up lever |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451207C (en) * | 2002-09-19 | 2009-01-14 | 周鹤鸣 | Link lever thread take-rp mechanism for sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233680A (en) | 1999-11-03 |
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