1113results about "Needle bars" patented technology

Individual motors in a sewing machine of the invention are provided, for each of a plurality of machine heads, for individually driving respective mechanical components, such as a needle bar driving mechanism, thread take-up lever and presser foot mechanism. A plurality of rotary hooks are driven by a common motor. Even in a case where embroidering workpieces set on the individual machine heads differ in material between the heads and upper threads used for the machine heads differ in characteristic between the heads, the sewing machine can make, in a concurrent, parallel fashion, embroidery products of different texture suited for the respective materials, characteristics, etc., by setting independent stitch formation per machine head.

An embroidery machine includes a sewing arm having an upper shaft for providing a driving force, a needle bar support case, which is assembled to a front portion of the sewing arm so as to be laterally movable, a needle bar provided in a needle bar support case, the needle bar having a needle at a lower end thereof and vertically carrying the needle using a rotation driving force of the upper shaft, and a presser foot, which is provided in the needle bar support case so as to be vertically movable, characterized in that each of the needle bar and the presser foot is operated by an individual drive mechanism. The presser foot is separately driven by its own drive source, independent of the drive source of the needle bar.

The invention relates to a chain stitch multi-needle guilting machine with stitch-forming quilting elements and a method for creating a pattern in a guilting material. The elements of the quilting machine are comprised of at least one needle bar with attached needles and at least one looper shaft with attached loopers. Each of the needles and the loopers have a corresponding needle thread and looper thread associated therewith, form quilting element pairs, and are driven to build chain stitches in a quilting material. At least one of the needles is adjustable between two positions and participates in the quilting procedure in a first position and does not prick into the quilting material in the second position during the quilting procedure. The quilting machine can be made to have a device to knot the needle thread with the looper thread, or a device to cut the looper thread, or both.

The invention relates to an upper machine head of an independently-driven rotary type automatic sewing device. The upper machine head comprises a machine head lifting assembly, a machine head rotating assembly and a machine head assembly, wherein the machine head rotating assembly is fixedly arranged on the machine head lifting assembly; the machine head assembly is fixedly arranged at the lower part of the machine head rotating assembly; the machine head rotating assembly comprises a conductive slip ring, a slip ring fixing seat, a machine head installation plate, a machine head rotating motor, a gearbox and a rotating shaft, the upper end of the rotating shaft is connected with the conductive slip ring for driving the conductive slip ring to rotate, and the rotating shaft can drive the machine head assembly to rotate clockwise or anticlockwise by 360 degrees; the machine head lifting assembly can drive the machine head assembly to move up and down through the machine head rotating assembly. The upper machine head disclosed by the invention can be lifted and can be rotated as well, various machining needs can be met, and the application range is greatly enlarged; the size is small, the integration degree is high, the upper machine head can be matched with a lower machine head for realizing synchronous high-speed rotating, the stability is high, the failure rate is low, and the maintenance is simple and convenient.

The invention discloses a high-efficiency dial linking machine. The high-efficiency dial linking machine comprises a headstock, a speed-regulating unit, a case and a dial; the headstock comprises a box, a box cover, a gear assembly and an adjusting handle, wherein the box cover is mounted on the top of the box, the gear assembly is mounted in the box, the adjusting handle is linked with the gear assembly, and the gear assembly comprises a first gear assembly and a second gear assembly which are respectively provided with a first helical gear and a second helical gear and are engaged with each other; the speed-regulating unit is linked with the gear assembly through a transmission by being matched with a motor; the case comprises a mounting bracket, an upper shield and a lower shield, and the upper shield and the lower shield are jointly formed into an automatic oil filling device; a helical tooth drive unit, a cam drive mechanism linked with the helical tooth drive unit, a striping unit, a push rod drive mechanism and a dividing unit linked with the cam drive mechanism are mounted in the case, wherein the helical tooth drive unit is linked with the gear assembly through a synchronous drive mechanism; and a debuggable counterweight is mounted on the dividing unit. The high-efficiency dial linking machine has the advantages of stable and smooth operation, good sewing quality, long service life and the like.

A threading device of a sewing machine includes a thread inserting base formed with a thread path hole having a thread inserting port opened toward an outer side of a sewing machine frame, and further formed with an air path hole which joins the thread path hole in the vicinity of the thread inserting port, an air supply device coupled to the air path hole to supply compressed air, and illuminating means provided on the sewing machine frame to irradiate a joining portion of the thread path hole and the air path hole. The thread inserting base includes a transparent member through which at least the joining portion of the thread path hole and the air path hole can be visually recognized.

A sewing machine includes a rotating hook, a lower shaft rotating the rotating hook in synchronization with vertical movement of the needlebar, a lower shaft gear including a helical gear and slidably mounted on the lower shaft, a hook gear including a helical gear capable of mesh engagement with the lower shaft gear and mounted on the rotating hook, a drive force transmission mechanism supporting the lower shaft so that the lower shaft is axially moveable and transmits rotation of the lower shaft to the lower shaft gear, a cam mechanism axially moving the lower shaft gear to adjust at least one of a left encounter timing for seizure of the needle thread loop by the hook beak when the needle occupies a left needle location and a right encounter timing for seizure of the needle thread loop by the hook beak when the needle occupies a right needle location.

The invention relates to a machine head and machine base split type pattern sewing machine belonging to the technical field of sewing machines. The machine head and machine base split type pattern sewing machine comprises an X-direction feed device, a Y-direction feed device, a machine head, a machine base and a stand, wherein the X-direction feed device and the Y-direction feed device are driven by respectively independent motors; the Y-direction feed device drives the X-direction feed device to move along a Y direction; the X-direction feed device is provided with a double-ball screw, and the synchronous feed of the double-ball screw is realized through a synchronous belt so that the machine base and the machine head which are arranged on the X-direction feed device can synchronously move. The invention has simple structure and easy operation and can move along an X direction and the Y direction and achieve the purposes of sewing patterns with large areas and enhancing the work efficiency; in addition; the pattern sewing machine can more stably work through the double-ball screw arranged on the X-direction feed device.

The invention belongs to the technical field of machinery and discloses an industrial sewing machine. A needle holder is driven to do vertical reciprocation by a swing rod and is driven to rotate around the needle holder axis by a needle holder rotation motor. A rotary hook and a hook carrier are mounted on a hook carrier assembly which comprises a shell, a rotary disc, a circular rotary seat, a belt pulley ring, a rotary hook motor, an assembly bearing and a slip ring. The rotary hook assembly is driven to do horizontal rotation by a rotary hook motor. Cloth to be sewn is clamped by a cloth feeding mechanism to do plane moving between the needle holder and the rotary hook. The needle holder rotation motor, the rotary hook carrier motor and the rotary hook motor are connected to a programmable logic controller on a table through the slip ring. The programmable logic controller drives the needle holder and the rotary hook carrier assembly to do rotation with same phase and same angular velocity. Products sewn by the industrial sewing machine have stable and firm stitches, and the industrial sewing machine is particularly suitable for sewing leather/cloth products in variable curved shapes.

The present invention is to improve sewing efficiency through omitting the regulating work of the installation position of a kettle (or a beating ring device) generated through the thickness of the matter to sewing or the rotation delay of sewing speed as well as a kettle (or a beating ring device). A sartorius comprises an upper axis, which keeps a needle of a sewing needle move up and down; a lower axis, driving a sewing catching unit which catches the upper thread of the sewing needle to swing with the lower thread; a drive source, applying rotary drive on the upper axis and the lower axis; an upper axis rotary part, rotating along with the upper axis; a lower axis rotary part, rotating along with the lower axis; a drive transferring part, which loop shaped frames set on the upper axis rotary part and the lower axis rotary part, at the same time transfers the rotary drive of a rotary part rotated by means of the drive source to another rotary part, the drive transferring part ensures the length rate of two frame parts connecting with the position between the upper axis and the lower axis rotary part to be alter automatically through outside force.

The present invention provides a fabric feeding apparatus of sewing machine capable of providing approximately same distance of sewing. The fabric feeding apparatus of sewing machine comprises a fabric frame (S), which moves synchronously with a needle bar (4) moving up and down driven by a motor of the sewing machine, and feeds fabric on a needle plate (2) by feeding tooth; a fabric feeding quantity input apparatus, which inputs fabric feeding quantity based on the fabric frame (S); a drive control apparatus (70), which measures fabric thickness fed by the fabric frame (S); a storing apparatus, which stores fabric feeding quantity translation table of relationship between fabric thickness and fabric feeding quantity suiting for the fabric thickness; and a fabric feeding quantity correction apparatus, which selects the fabric feeding quantity corresponding with fabric thickness measured by the drive control apparatus (70) from the fabric feeding quantity translation table and corrects the data of fabric feeding quantity with the fabric feeding quantity input apparatus such that the fabric feeding quantity is that selected.

The present invention relates to a sewing machine which evaluates sewing quality using a thread tightening index. During a sewing operation, an upper thread used length (U) used for each stitch is detected, and a thread tightening index (Ks) for each sewn stitch is calculated on the basis of a stitch length (M) for each stitch, defined in accordance with sewing pattern data, a fabric thickness (t) of the object being sewn, and the detected upper thread used length (U) data. A report (for example a display of the thread tightening index Ks) corresponding to the thread tightening index (Ks) calculated for each sewn stitch is issued. By comparing the thread tightening index (Ks) calculated for each sewn stitch with a reference value (Kref), the acceptability of the thread tightness for each sewn stitch can be assessed, and the assessment results can be reported.

A sewing thread (20) can be captured certainly with a thread capturing open eye (13a) of an open eye needle (13) and the stitches are formed in the inner space of a sewing machine bed (3). A handstitch and a locked stitch are formed, respectively, on the front surface and the back surface of a fabric workpiece (21) as a skip stitch set through cooperation of the open eye needle (13), a shuttle hook (200) and a thread draw out actuator (401). A feed dog (601) feeds the fabric workpiece by a stitch length (P1) for handstitch during a first stroke of the open eye needle (13), and feeds the fabric workpiece by an inter-stitch pitch (P2) between the handstitches during a second stroke of the open eye needle (13).

The invention relates to a connecting rod of a sewing machine and a preparation method thereof. The connecting rod is composed of a needle stem crankshaft bar, a needle bar column and a needle bar holding part and made of an aluminum alloy, wherein the aluminum alloy comprises, by weight, 6.2 to 7.0% of Si, 1.0 to 2.5% of Cu, 0.05 to 0.15% of Fe, 0.3 to 0.4% of Mg, 0.1 to 0.2% of Mn, 0.1 to 0.5% of Ni, 0.7 to 1.0% of Zn and 0.01 to 0.025% of Sc, with the balance being Al and unavoidable impurities. The preparation method comprises the following steps: fusing the above-mentioned metals and carrying out stirring and slag removal; then carrying out stamping and die casting so as to obtain blanks of the needle stem crankshaft bar, the needle bar column and the needle bar holding part; and finally, subjecting the blanks to post-treatment and carrying out assembling to obtain the connecting rod of the sewing machine. The connecting rod of the sewing machine has good strength, hardness, plasticity, toughness, wear resistance, elongation, tensile strength, etc. and high quality.

The sewing machine of the present invention has a needle bar crank linked to a main shaft, a vertical movement transmission mechanism linked to the needle bar crank, and a needle swing mechanism for swinging the needle bar. The up and down movement transmission mechanism includes: a ring-shaped member having a space defined by a ring-shaped inner peripheral surface, through which the needle bar passes; and a pair of upper and lower needle bar frame members, which are fixed on the outside of the needle bar, and Arranged on the upper and lower sides of the ring member. The ring member is journally connected to the needle bar crank. A clearance for swinging is ensured between the annular inner peripheral surface of the space of the annular member and the outer periphery of the needle bar. The needle bar can swing without being in contact with the annular inner peripheral surface within the swing gap.

The invention belongs to the technical field of quilting machines, and particularly relates to a numerical-control sewing and embroidering quilting machine provided with a horizontal multi-needle machine head. The numerical-control sewing and embroidering quilting machine comprises a frame, wherein the frame comprises a rack and an upper frame which is arranged at the upper end of the rack; the frame is provided with the multi-needle machine head capable of moving longitudinally; a rotating shuttle mechanism is arranged under the multi-needle machine head; the frame is provided with a first driving mechanism for driving the multi-needle machine head and the rotating shuttle mechanism to move synchronously; the multi-needle machine head is connected with the upper frame in a sliding manner; the rotating shuttle mechanism is connected with the rack in the sliding manner; the frame is also provided with a second driving mechanism for driving a fabric to be fed horizontally. The multi-needle machine head of the numerical-control sewing and embroidering quilting machine is arranged in a direction vertical to the feeding direction of the fabric, so that two adjacent needles have no interference in sewing trace during sewing, no wired node is formed in a spliced point, and thus the node is unlikely to loosen, and the quality and the attractive appearance of the product are guaranteed; a plurality of sewing needles work simultaneously, so the production efficiency is improved.

The invention provides a bent two-needle sewing machine, belongs to the mechanical technical field, and solves the technical problems that the existing bent two-needle sewing machine can not be conveniently installed and maintained, and can not manufacture different three-dimensional stripes. The bent two-needle sewing machine comprises a sewing machine head, a bottom board, a needle clamp and two needles fixedly connected on the needle clamp, wherein, the sewing machine head is fixedly connected on the bottom board; the needle clamp is connected with the sewing machine head; and a detachable mechanism is arranged between the needle clamp and the sewing machine head. The bent two-needle sewing machine has the advantages of high positioning precision of needles, convenient disassembly, assembly, replacement and maintenance, etc.

The invention discloses a multifunctional swinging type quilting and embroidering integration machine. The multifunctional swinging type quilting and embroidering integration machine comprises a rack, a machine head moving type working mechanism, a machine head swinging movement mechanism, a rotating shuttle box moving type working mechanism, a rotating shuttle box swinging movement mechanism and a cloth guiding mechanism, wherein a screw-rod servo motor drives the machine head moving type working mechanism and the rotating shuttle box moving type working mechanism to do synchronous X-direction movement on a linear guide rail I, a linear guide rail II, a linear guide rail III and a linear guide rail IV respectively; a moving servo motor drives the machine head moving type working mechanism and the rotating shuttle box moving type working mechanism to do X-direction movement; a swinging servo motor drives the machine head swinging movement mechanism and the rotating shuttle box swinging movement mechanism to do Y-direction reciprocating movement. The multifunctional swinging type quilting and embroidering integration machine has the advantages that infinitely-circulating quilting and embroidering are realized, the needle distance is short and can be set randomly, the adaptability to patterns is high, the accuracy of processed patterns is high and the application range is wide.