Sewing machine differential feeding device
A technology of feeding device and sewing machine, which is applied to sewing machine components, sewing equipment, cloth feeding mechanism, etc., can solve the problems such as the inability to change the differential momentum of the sewing machine, multiple tests, and the inability of users to use it quickly and conveniently, so as to achieve the convenience of upgrading. effect of sex, lowering the center of gravity, simplifying the number of
Inactive Publication Date: 2017-04-12
CHEE SIANG IND CO LTD
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Problems solved by technology
[0004] However, the feeding device of the traditional roller feeding sewing machine adopts the principle of one-way bearing. Although the differential feeding device can carry out forward and reverse differential feeding, it must be adjusted through tools, which makes it impossible to change the differential amount during the sewing machine. , and sometimes the adjustment requires multiple tests. In addition, the operating position of the differential adjustment is usually far away from the operating position for adjusting the stitch length on the sewing machine, which often prevents the user from using it quickly and conveniently.
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[0031] In order to further have a clearer and more detailed understanding and understanding of the structure, use and features of the present invention, preferred embodiments are given, and the details are as follows in conjunction with the drawings:
[0032] see figure 1 and figure 2 As shown, the sewing machine 10 of the present invention mainly includes a head 11 , a base 12 and a pillar 13 .
[0033] An upper feeding mechanism 20 is installed inside the headstock 11 to drive an upper feeding wheel 21 to rotate; a lower feeding mechanism 30 and a linkage mechanism 40 are installed inside the base 12; the lower feeding mechanism 30 drives the lower feeding wheel 31 to carry out Rotate, and be connected to the linkage mechanism 40 to act together; and the pillar 13 part is equipped with a transmission assembly 50 and a differential adjustment mechanism 60, wherein one end of the transmission assembly 50 is connected to the upper feeding mechanism 20, The other end is conne...
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The invention provides a differential feeding device of a sewing machine. The differential feeding device comprises a lower feeding mechanism, a linkage mechanism, a differential adjusting mechanism and an upper feeding mechanism, wherein the lower feeding mechanism comprises a lower feeding shaft composed of a first feeding shaft and a second feeding shaft coaxial with the first feeding shaft; the first feeding shaft penetrates through a first clutch assembly and the second feeding shaft penetrates through a second clutch assembly; the linkage mechanism is provided with a linkage shaft parallel to the lower feeding shaft; the linkage shaft is connected with a first clutch assembly and a second clutch assembly respectively; the differential adjusting mechanism is assembled between the linkage shaft and the first clutch assembly; the upper feeding mechanism is provided with an upper feeding shaft; the upper feeding shaft is connected with the first feeding shaft by a transmission assembly, so that the two feeding mechanisms can move synchronously. According to the differential adjusting mechanism, the rotary angle acting on a needle upper feeding process by the first clutch assembly can be selectively increased or decreased, so that corresponding positive and negative differential feeding is generated.
Description
technical field [0001] The invention relates to a sewing machine that changes the relative feeding amount between the upper feeding wheel and the lower feeding wheel, in particular to a design that adopts a coaxial clutch assembly and a differential adjustment mechanism to work together so that a relative speed is generated between the two feeding wheels Variation of differential feeding device. Background technique [0002] The feeding stroke of a general sewing machine mainly includes two parts: the needle-down feeding stroke when a needle goes through the fabric under the needle, and the needle-up feeding stroke when the needle leaves the fabric. Among them, during the needle-down feeding stroke, the needle and the fabric advance at the same time. At this time, the upper and lower feeding wheels need to rotate synchronously so that the upper and lower layers of fabric will not produce holes or the needle will be deflected; During the upper feeding stroke, the needle retu...
Claims
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IPC IPC(8): D05B27/16
CPCD05B27/16
Inventor 陈满雄
Owner CHEE SIANG IND CO LTD