A kind of driving mechanism of flat seam machine
Technical field
The invention belongs to the driving mechanism in sewing machine technique field, particularly a kind of flat seam machine.
Background technology
Flat seam machine is the most basic car type at sewing device, in making, is the simplest stitching, and the stitching neat appearance, the stitching that sew are even, and smooth firmly sewing velocity is fast, easy and simple to handle, and use is easily understood.
At present, flat seam machine of the prior art normally goes up axle by belt pulley transmission feed lifting rock shaft, feed lifting rock shaft is again by gear drive lower shaft, there is following problem in this structure: the one, and higher to the required precision of gear, and structure is comparatively complicated, required part is also more, caused part processing and assembly difficulty large, have influence on performance and the maintenance of complete machine, increased production cost, the 2nd, because gear is intermeshing, after long-term use, wear and tear, have influence on lower shaft and upper axle speed ratio, easily produce striker phenomenon, incured loss through delay the duration, reduced production efficiency, the 3rd, inflexible because the complexity of this structure causes backstitching the installation site of spanner, can not install flexibly.
Summary of the invention
The driving mechanism that the object of this invention is to provide the flat seam machine that a kind of structural stability is strong, serviceability is good.
The object of the present invention is achieved like this: a kind of driving mechanism of flat seam machine, comprise axle on Sewing machines, lower shaft and backstitch spanner, it is characterized in that: described upper axle and one end of lower shaft are all provided with synchronous pulley, synchronous pulley one side on upper axle is connected by the motor shaft of shaft coupling and drive motors, synchronous pulley on upper axle and the synchronous pulley on lower shaft pass through toothed belt transmission, the opposite side that is positioned at the synchronous pulley on axle is separately installed with and is lifted tooth connecting rod and feeding connecting rod by two eccentric wheels, synchronous pulley and Timing Belt are arranged in the independently sealed chamber being partitioned into seal diaphragm, or eccentric wheel, synchronous pulley and Timing Belt are all arranged in the independently sealed chamber being partitioned into seal diaphragm, described feeding connecting rod connects feed spool by oscillating feed device, oscillating feed device is connected with and is backstitched spanner by Backsewing unit, described backstitch left side or the right side that spanner is arranged on Timing Belt.
Operation principle of the present invention is directly to drive lower shaft to rotate by upper axle, to connect by toothed belt transmission, its sync rates of the upper and lower axle of this structure is high, therefore in Sewing machines work process, process more accurate, synchronous pulley on upper axle, Timing Belt are all arranged in the independently sealed chamber being partitioned into seal diaphragm, avoided skidding because entering of lubricating oil causes work, guaranteed stability in use, the fixed position that simultaneously backstitches spanner is positioned at left side or the right side of this sewing machine synchronous belt, therefore applicable to multiple Sewing machines.
In the driving mechanism of above-mentioned a kind of flat seam machine, described seal diaphragm is arranged on body inner chamber and body inwall is one-body molded, and seal diaphragm is provided with the through hole of using through upper axle, is installed with and the counterrotating oil sealing of upper axle in through hole.
In the driving mechanism of above-mentioned a kind of flat seam machine, synchronous pulley on described upper axle by shaft coupling with the concrete structure that the motor shaft of drive motors is connected is: on this synchronous pulley, be provided with the groove being connected with shaft coupling one end, one end of shaft coupling is plugged in groove, the other end of shaft coupling is fixedly connected with motor shaft, is provided with elastic buffer sheet between the groove on shaft coupling and synchronous pulley.
In the driving mechanism of above-mentioned a kind of flat seam machine, synchronous pulley on described upper axle by shaft coupling with the concrete structure that the motor shaft of drive motors is connected is: one-body molded on the one or both ends on synchronous pulley axis have a sleeve, on sleeve, be all radially provided with screwed hole, described upper axle and motor shaft are plugged in sleeve and by bolt and are screwed onto in screwed hole with axle fixing and motor shaft from the two ends of sleeve respectively.
In the driving mechanism of above-mentioned a kind of flat seam machine, the concrete structure of described Backsewing unit is: the connecting rod of falling feeding that is connected with the motion that matches with the crank of falling feeding on oscillating feed device, one end of the described crank of falling feeding is provided with the roller pin that drives the link motion of falling feeding, the other end is fixed with the wrench shaft that backstitches being supported on head shell, backstitches wrench shaft and backstitches spanner and be connected mutually.
In the driving mechanism of above-mentioned a kind of flat seam machine, synchronous pulley on described upper axle by shaft coupling with the concrete structure that the motor shaft of drive motors is connected is: a side on synchronous pulley axis is one-body molded sleeve, on sleeve, be radially provided with screwed hole, described upper axle or motor shaft are plugged in sleeve and are screwed onto in screwed hole fixing by bolt, on the teeth groove of described synchronous pulley, be radially provided with the long screwed hole that is communicated with synchronous pulley centre bore, described upper axle or motor shaft are plugged in synchronous pulley centre bore and are screwed onto in long screwed hole fixing by bolt.
In the driving mechanism of above-mentioned a kind of flat seam machine, described backstitch the concrete structure that spanner is arranged on the right side of Timing Belt and be, the Bing Qi right part, right side that the right-hand member that backstitches wrench shaft extends Timing Belt through annular Timing Belt is fixed with and backstitches wrench.
In the driving mechanism of above-mentioned a kind of flat seam machine, the ratio of the synchronous pulley on described upper axle and the reference diameter of the synchronous pulley on lower shaft is 2: 1.
The present invention compared to existing technology outstanding and useful technique effect is:
1, the present invention adopts upper axle directly to drive lower shaft by Timing Belt, synchronous pulley, has omitted original gear drive or link transmission, and therefore the sync rates of upper and lower axle is high, Sewing machines precision machining, stable.。
2, between shaft coupling of the present invention and the groove of synchronous pulley, be provided with elastic buffer sheet, make the transmission of power of axle on electric machine main shaft and Sewing machines steady, the waste that has reduced energy has guaranteed the service behaviour of Sewing machines simultaneously, or having adopted hard upper axle and the motor shaft of connecting of the integrated sleeve of synchronous pulley, syndeton is simple, practical function is good.
3, the wrench shaft realization that backstitches by different length of the present invention backstitches left side or the right side that spanner is arranged on Timing Belt, and structure is very clear, practical.
4, the present invention be by seal diaphragm by synchronous pulley, Timing Belt and eccentric wheel respectively in being located at two chambeies; prevented that lubricating oil from entering to skidding of causing in the chamber of Timing Belt, synchronous pulley; guaranteed the stability of using; or by synchronous pulley, Timing Belt and eccentric wheel in being located at same annular seal space, simultaneously to the feeding on eccentric wheel, lift tooth connecting rod and seal anti-skidding protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is drive connection structure chart of the present invention.
Fig. 3 is the second syndeton schematic diagram and the cutaway view of synchronous pulley of the present invention and each axle.
Fig. 4 is the third syndeton schematic diagram and cutaway view of synchronous pulley of the present invention and each axle.
Fig. 5 is the 4th kind of syndeton schematic diagram and cutaway view of synchronous pulley of the present invention and each axle.
Fig. 6 is the first syndeton schematic diagram and the cutaway view of synchronous pulley of the present invention and each axle.
Fig. 7 is the mounting structure cutaway view of seal diaphragm of the present invention in body.
Fig. 8 is the similar alternative arrangements cutaway view of seal diaphragm of the present invention in body.
The specific embodiment
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, referring to Fig. 1-8:
A kind of driving mechanism of flat seam machine, comprise axle 1 on Sewing machines, lower shaft and backstitch spanner 2, it is characterized in that: described upper axle 1 is all provided with synchronous pulley 3 with one end of lower shaft, synchronous pulley 3 one sides on upper axle are connected by shaft coupling 10 and the motor shaft 11 of drive motors, synchronous pulley 3 on upper axle passes through Timing Belt 4 transmissions with the synchronous pulley on lower shaft, the opposite side that is positioned at the synchronous pulley 3 on axle is separately installed with and is lifted tooth connecting rod and feeding connecting rod 5 by two eccentric wheels 12, synchronous pulley and Timing Belt 4 are arranged in the independently sealed chamber being partitioned into seal diaphragm 6, or eccentric wheel, synchronous pulley and Timing Belt are all arranged in the independently sealed chamber being partitioned into seal diaphragm 6, described feeding connecting rod 5 connects feed spool 51 by oscillating feed device, oscillating feed device is connected with and is backstitched spanner 2 by Backsewing unit, described backstitch left side or the right side that spanner 2 is arranged on Timing Belt 4.Operation principle of the present invention is directly to drive lower shaft to rotate by upper axle 1, to be in transmission connection by Timing Belt 4, in this structure, its sync rates of lower shaft is high, therefore in Sewing machines work process, process more accurate, synchronous pulley 3 on upper axle, Timing Belt 4 is all arranged in the independently sealed chamber being partitioned into seal diaphragm or the opposite side that is positioned at the synchronous pulley 3 on upper axle is separately installed with and is lifted tooth connecting rod and feeding connecting rod 5 by two eccentric wheels 12, synchronous pulley and Timing Belt 4 are arranged in the independently sealed chamber being partitioned into seal diaphragm 6, , avoided skidding because entering of lubricating oil causes work, guaranteed stability in use, the fixed position that simultaneously backstitches spanner 2 is positioned at left side or the right side of this sewing machine synchronous belt 4, therefore applicable to multiple Sewing machines.
At above-mentioned seal diaphragm 6, be arranged on body inner chamber and body inwall is one-body molded, seal diaphragm 6 is provided with the through hole of using through upper axle, is installed with and the counterrotating oil sealing of upper axle in through hole.
As the first embodiment of the present invention, referring to Fig. 6: the synchronous pulley 3 on above-mentioned upper axle by shaft coupling 10 with the concrete structure that the motor shaft 11 of drive motors is connected is: be provided with the groove being connected with shaft coupling 10 one end on this synchronous pulley 3, one end of shaft coupling is plugged in groove, the other end of shaft coupling is fixedly connected with motor shaft, is provided with elastic buffer sheet 7 between the groove on shaft coupling and synchronous pulley.
As the second of the present invention and the third embodiment, referring to Fig. 3 and Fig. 4: the synchronous pulley 3 on above-mentioned upper axle by shaft coupling 10 with the concrete structure that the motor shaft 11 of drive motors is connected is: one-body molded on the one or both ends on synchronous pulley 3 axis have a sleeve 100, on sleeve 100, be all radially provided with screwed hole, described upper axle 1 and motor shaft 11 are plugged in sleeve and by bolt and are screwed onto in screwed hole with axle fixing and motor shaft from the two ends of sleeve respectively.
As the 4th kind of embodiment of the present invention, referring to Fig. 5: the synchronous pulley 3 on above-mentioned upper axle by shaft coupling 10 with the concrete structure that the motor shaft 11 of drive motors is connected is: a side on synchronous pulley axis is one-body molded sleeve 100, on sleeve, be radially provided with screwed hole, described upper axle or motor shaft are plugged in sleeve and are screwed onto in screwed hole fixing by bolt, on the teeth groove 31 of described synchronous pulley, be radially provided with the long screwed hole 32 that is communicated with synchronous pulley centre bore, described upper axle or motor shaft are plugged in synchronous pulley centre bore and by bolt, to be screwed onto long screwed hole 32 interior fixing.
Concrete structure at above-mentioned Backsewing unit is: the connecting rod of falling feeding 9 that is connected with the motion that matches with the crank of falling feeding 8 on oscillating feed device, one end of the described crank of falling feeding 8 is provided with the roller pin 80 that drives the link motion of falling feeding, the other end is fixed with to be supported on and backstitches wrench shaft 81 on head shell, backstitches wrench shaft and backstitches spanner and be connected mutually.
Above-mentioned, backstitch the concrete structure that spanner is arranged on the right side of Timing Belt and be: the Bing Qi right part, right side that the right-hand member that backstitches wrench shaft 81 extends Timing Belt through annular Timing Belt 4 is fixed with and backstitches wrench 2.
The ratio of the synchronous pulley 3 on above-mentioned upper axle and the reference diameter of the synchronous pulley on lower shaft is 2: 1.Different according to the rotating ratio of diaxon, adopt the synchronous pulley of corresponding reference diameter, and then connect by toothed belt transmission, its sync rates of the upper and lower axle of this transmission mechanism is high, therefore, in Sewing machines work process, processes more accurate.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalences of doing according to structure of the present invention, shape, principle change, within all should being covered by protection scope of the present invention.