CN102888722A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
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- CN102888722A CN102888722A CN2011102090704A CN201110209070A CN102888722A CN 102888722 A CN102888722 A CN 102888722A CN 2011102090704 A CN2011102090704 A CN 2011102090704A CN 201110209070 A CN201110209070 A CN 201110209070A CN 102888722 A CN102888722 A CN 102888722A
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Abstract
The invention provides a sewing machine which is provided with a coupler for connecting an upper shaft with a rotating shaft. The durability of the coupler is ensured while the axial size of the coupler is restrained and the universality of the coupler is increased. The sewing machine is provided with the coupler for connecting the upper shaft with the rotating shaft of a motor, wherein the coupler is provided with a first pivot hub, a second pivot hub and a connecting part; the first pivot hub is fixed on one of the upper shaft and the rotating shaft; the first pivot hub is provided with a first annular part, a plurality of first blocking bulges and a first insert hole; the second pivot hub is fixed on the other of the upper shaft and the rotating shaft; the second pivot hub is provided with a second annular part, a plurality of second blocking bulges and a second insert hole; the connecting part is made of an elastic material; the first pivot hub and the second pivot hub are embedded with the connecting part, so as to clamp the clamping parts of the connecting part between the first pivot hub and the second pivot hub along the peripheral direction; the connecting part is provided with an annular part having an annular shape; a plurality of clamping parts are protruded inward from the inner periphery of the annular part along the radial direction; and the second annular part and the second blocking bulges are accommodated by being embedded inside the annular part.
Description
Technical field
The present invention relates to a kind of Sewing machines with shaft coupling that 2 axles are linked.
Background technology
On the upper axle of Sewing machines, link the rotating shaft of motor or be passed the revolving force of motor and the rotating shaft that rotates via shaft coupling.
As shown in figure 13, existing shaft coupling 71 has: pivot hub 72,73, and it is separately fixed on axle and the rotating shaft; And connecting member 74, it is arranged between the pivot hub 72,73.
Connecting member 74 is formed by the rubber elastomeric material.Connecting member 74 has: annulus 86, and it has hole section 85 at the center; And a plurality of holding sections 87, its periphery at annulus 86 forms across the interval along Zhou Fangxiang.Between adjacent holding section 87, form chimeric recess 88.
By pivot hub 72,73 engaging protuberance 75,76 are embedded in the chimeric recess 88 of connecting member 74 alternately, thereby via connecting member 74 pivot hub 72,73 is linked, upper axle and rotating shaft are linked.
In addition, in recent years, be accompanied by the miniaturization requirement of Sewing machines, proposed to suppress the shaft coupling (for example, with reference to patent documentation 1 and patent documentation 2) of axial dimension.
Figure 14 represents the shaft coupling 91 of patent documentation 1.Shaft coupling 91 has: pivot hub 96,97; And connecting member 95, it links pivot hub 96,97.Connecting member 95 has a plurality of holding sections 92, and it arranges across the interval along Zhou Fangxiang.Adjacent holding section 92 utilizes the link board 94 of thin-walled to link axial arbitrary distolateral.Pivot hub 96 has a plurality of engaging protuberances 98, and it arranges across the interval along Zhou Fangxiang.Between adjacent engaging protuberance 98, form slot part 96a.Pivot hub 97 has a plurality of engaging protuberances 99, and it arranges across the interval along Zhou Fangxiang.In the chimeric recess 93 between the holding section 92 that pivot hub 96,97 engaging protuberance 98,99 is embedded alternately connecting member 95, thereby via connecting member 95 pivot hub 96,97 is linked, the rotating shaft of upper axle and motor is linked.According to this shaft coupling 91, because pivot hub 96 is almost overlapping in the axial direction with connecting member 94, so suppress the axial dimension of shaft coupling 91.
In patent documentation 2, the shaft coupling structure that the rotating shaft with the lower shaft of Sewing machines and motor links is disclosed.In this shaft coupling structure, form the link key element at the inner peripheral surface that is fixed in the toothed belt wheel on the lower shaft, via the connecting member chimeric with linking key element, belt wheel and rotating shaft are linked.
Patent documentation 1:CN200940202Y
Patent documentation 2: Japanese kokai publication hei 10-57653 communique
But, shaft coupling 91 according to patent documentation 1 is put down in writing because the link board 94 that holding section 92 links is thin-walled, lacks durability, rotary load in the time of may driving because of Sewing machines makes and links board 94 breakages, thereby pivot hub 96,97 link are had problems.
In addition, the shaft coupling structure put down in writing of patent documentation 2 links key elements by 2 and consists of.On the side face of a link key element, unremovably be combined with the cladding that is consisted of by polyurethane.Lose thus the replaceability of parts, lack versatility.
Summary of the invention
The object of the invention is to, in the Sewing machines with shaft coupling that upper axle and rotating shaft are linked, guarantee the durability of shaft coupling, suppress simultaneously the axial dimension of shaft coupling, and improve the versatility of shaft coupling.
Sewing machines according to a kind of mode of the present invention has: upper axle; The needle bar driving mechanism, its rotation by upper axle moves up and down needle bar; Motor, it has rotating shaft; And shaft coupling, it links rotating shaft and upper axle.Shaft coupling has: the 1st pivot hub, it is fixed on in axle and the rotating shaft one, have the 1st annulus, a plurality of the 1st engaging protuberance, reach the 1st patchhole, these a plurality of the 1st engaging protuberances protrude vertically from the side of the 1st annulus, arrange across the interval along Zhou Fangxiang, the 1st patchhole makes an insertion in axle and the rotating shaft; The 2nd pivot hub, it is fixed on in axle and the rotating shaft another, have the 2nd annulus, a plurality of the 2nd engaging protuberance, reach the 2nd patchhole, these a plurality of the 2nd engaging protuberances protrude to radial outside from the outer peripheral face of the 2nd annulus, arrange across the interval along Zhou Fangxiang, the 2nd patchhole makes another insertion in axle and the rotating shaft; And connecting member, it is formed by elastomeric material, has a plurality of holding sections that arrange across the interval along Zhou Fangxiang.The 1st pivot hub and the 2nd pivot hub and connecting member are chimeric, with the holding section of clamping connecting member between the 1st engaging protuberance on the Zhou Fangxiang and the 2nd engaging protuberance.Connecting member has the annulus of the ring-type of forming.Protrude to radially inner side from the inner peripheral surface of annulus a plurality of holding sections.The 2nd annulus and a plurality of the 2nd engaging protuberance embed the inboard of annulus and are accommodated.
According to this structure, because annulus and a plurality of engaging protuberance of the 2nd pivot hub is housed in the inboard of the annulus of connecting member, so can suppress the axial dimension of shaft coupling.In addition, because the structure that to be a plurality of holding sections of making connecting member protrude to radially inner side from the inner peripheral surface of annulus, so can guarantee with the degree that obtains abundant intensity axial dimension and the radial dimension of annulus.That is, can guarantee the durability of shaft coupling, and suppress the axial dimension of shaft coupling.
In above-mentioned Sewing machines, preferred the 2nd pivot hub has the screwed hole that radially runs through till the 2nd engaging protuberance to the 2 patchholes, utilizes the screw that is screwed into to the screwed hole, on another in upper axle and rotating shaft, fixes the 2nd pivot hub.
According to this structure, because the 2nd engaging protuberance that covers at the annulus that is bonded parts forms screwed hole, so compare with the structure that forms screwed hole at the part place that is offset vertically with respect to connecting member, can reduce the axial dimension of shaft coupling.
In above-mentioned Sewing machines, preferred described the 1st pivot hub is fixed on the axle, and described the 2nd pivot hub is fixed on the rotating shaft, and the 2nd pivot hub has flange part, its vertically with the connecting member butt.
According to this structure, by the 2nd pivot hub being embedded connecting member, so that flange part and connecting member butt, thereby limit relatively moving on the 2nd pivot hub and connecting member axial, can easily carry out the location between the 2nd pivot hub and the connecting member.
In above-mentioned Sewing machines, a plurality of the 1st engaging protuberances of preferred the 1st pivot hub embed and are housed in the inboard of annulus, the screwed hole that the 1st pivot hub radially runs through till having from described the 1st annulus to described the 1st patchhole, the screw that utilization is screwed in the described screwed hole is fixed on described the 1st pivot hub on the upper axle.
According to this structure, can further dwindle the axial dimension of shaft coupling.
In above-mentioned Sewing machines, preferably also have the motor erecting bed, it is installed in the vertical body section of sewing machine stand, motor is via the motor erecting bed, be installed in the outside of vertical body section, shaft coupling is in the vertical outside of body section, and rotating shaft and the described upper axle of motor linked.
According to this structure, can provide a kind of Sewing machines that uses existing sewing machine stand.
In above-mentioned Sewing machines, preferably has annular projection, it forms from the sewing machine stand projection, has the 1st notch in its periphery, the motor erecting bed has the 2nd notch, when being installed on the motor erecting bed on the annular projection, the position of the position of the 1st notch and the 2nd notch is consistent on Zhou Fangxiang.
According to this structure, overlap by making the 1st notch and the 2nd notch, thereby form screwdriver behaviour functional hole, the operating personnel can easily carry out the fitting operation of the 1st pivot hub.
The effect of invention
According to the present invention, in the Sewing machines with shaft coupling that upper axle and rotating shaft are linked, when guaranteeing the durability of shaft coupling, suppress the axial dimension of shaft coupling, and can improve the versatility of shaft coupling.
Description of drawings
Fig. 1 is the summary section of the related Sewing machines of the 1st embodiment of the present invention.
Fig. 2 is the oblique view of the upper axle that links of the motor of Sewing machines.
Fig. 3 utilizes shaft coupling with the exploded perspective view of the linking portion of upper axle and rotating shaft link.
Fig. 4 is the oblique view of the shaft coupling after the assembling.
Fig. 5 is the figure of the structure member of expression shaft coupling, (a) is the top view of upper axle pivot hub, (b) is the top view of connecting member, (c) is the top view of rotating shaft pivot hub.
Fig. 6 is the front view of the related Sewing machines of the 2nd embodiment of the present invention.
Fig. 7 is the oblique view of mounting portion of motor of the Sewing machines of Fig. 6.
Fig. 8 is the oblique view with the state behind the removal motor erecting bed in the mounting portion of the motor of the Sewing machines of Fig. 6.
Fig. 9 is the oblique view that the motor erecting bed of motor is installed at sewing machine stand.
Figure 10 be the 3rd embodiment of the present invention shaft coupling want section's skeleton diagram.
Figure 11 utilizes the shaft coupling of the 4th embodiment of the present invention with the exploded perspective view of the linking portion of upper axle and rotating shaft link.
Figure 12 is the summary section of the related Sewing machines of other embodiments of the present invention.
Figure 13 is the exploded perspective view of shaft coupling of the Sewing machines of conventional example.
Figure 14 is the exploded perspective view of shaft coupling of the Sewing machines of other conventional examples.
The specific embodiment
Below, referring to figs. 1 through Fig. 5, the 1st embodiment of the present invention is described.
As shown in Figure 1, Sewing machines 1 has sewing machine stand 2.Sewing machine stand 2 has: base portion 2a; Vertical 2b of body section, it uprightly is arranged on the base portion 2a; Arm 2c, it is from top and the configuration of base portion 2a almost parallel ground of vertical body 2b of section; And head 2d, it is configured in the front end of arm 2c.
At the outside on vertical body section 2b top configuration motor 3.Motor 3 has pair of rotary shafts 3a, the 3b that protrudes from axial both sides.Rotating shaft 3a and upper axle 5 link, and rotating shaft 3b and flywheel 4 link.Flywheel 4 is configured in the outside of vertical body 2b of section.The not shown engine casing (Eng Cas) of the outer periderm of motor 3 covers, but flywheel 4 is configured in the outside of engine casing (Eng Cas).
As shown in Figure 2, be provided with belt wheel 9 at upper axle 5.The cardinal extremity of upper axle 5 links via the rotating shaft 3a of shaft coupling 10 with motor 3.
In base portion 2a, lower shaft 12 along continuous straight runs that are fixed with belt wheel 13 extend, and can be supported by axle with rotating freely.Link (not shown) such as cloth feeding mechanism, still driving mechanisms at lower shaft 12.
To shown in Figure 5, shaft coupling 10 has such as Fig. 3: upper axle pivot hub 21 (the 1st pivot hub), and it is fixed on the axle 5; Rotating shaft pivot hub 22 (the 2nd pivot hub), it is fixed on the rotating shaft 3a of motor 3; And connecting member 20, it is arranged between axle pivot hub 21 and the rotating shaft pivot hub 22.
Upper axle pivot hub 21 has: annulus 23 (the 1st annulus), and it forms ring-type; And a plurality of engaging protuberances 24 (the 1st engaging protuberance), it arranges across the interval along Zhou Fangxiang from the side of the annulus 23 relative with rotating shaft pivot hub 22 to axial protrusion.In upper axle pivot hub 21, be formed centrally patchhole 26 (the 1st patchhole), in patchhole 26, insert axle 5.
On the annulus 23 of upper axle pivot hub 21, radially extend to the inner peripheral surface of patchhole 26 and form screwed hole 27 from the outer peripheral face of annulus 23.Be screwed into screw 28 in screwed hole 27, thus, the upper axle 5 in being inserted into patchhole 26 is fixed axle pivot hub 21.The quantity of screwed hole 27 does not limit especially, but in the present embodiment, a plurality of (for example 2) screwed hole 27 forms across the interval along Zhou Fangxiang.
Rotating shaft pivot hub 22 has: annulus 33 (the 2nd annulus), and it forms ring-type; And a plurality of engaging protuberances 34 (the 2nd engaging protuberance), its outer peripheral face from annulus 33 protrudes to radial outside, configures across the interval along Zhou Fangxiang.Annulus 33 has the external diameter of the radially inner side of a plurality of engaging protuberances 24 that are contained in axle pivot hub 21.Center (center of annulus 33) at rotating shaft pivot hub 22 forms patchhole 36 (the 2nd patchhole), inserts the rotating shaft 3a of motor 3 in patchhole 36.
Rotating shaft pivot hub 22 has screwed hole 37, and it radially runs through till patchhole 36 from engaging protuberance 34.That is, the face of outer circumferential side from engaging protuberance 34 radially extends to patchhole 26 and forms screwed hole 37.Be screwed into screw 38 in screwed hole 37, thus, the rotating shaft 3a in being inserted into patchhole 36 is rotating shaft pivot hub 22 fixedly.The quantity of screwed hole 37 does not limit especially, but in the present embodiment, forms respectively screwed hole 37 on 2 engaging protuberances 34.
Rotating shaft pivot hub 22 has flange part 39, its vertically with the connecting member butt.Flange part 39 is axial one distolateral annulus 33 and a plurality of engaging protuberances 34, protrudes to radial outside on whole Zhou Fangxiang.
Connecting member 20 is formed by the rubber elastomeric material.Connecting member 20 has the annulus 41 of the ring-type of forming.Connecting member 20 also has a plurality of holding sections 42, and they protrude to radially inner side from the inner peripheral surface of annulus 41, arranges across the interval along Zhou Fangxiang.Between holding section adjacent on the Zhou Fangxiang 42, form chimeric recess 43.The quantity of the engaging protuberance 34 of the quantity of the engaging protuberance 24 of upper axle pivot hub 21 and rotating shaft pivot hub 22 is respectively half of quantity of engaging recessed part 43.The quantity of engaging recessed part 43 does not limit especially, but in the present embodiment, the quantity of engaging recessed part 43 is 6, and the quantity of the engaging protuberance 34 of the quantity of the engaging protuberance 24 of upper axle pivot hub 21 and rotating shaft pivot hub 22 is respectively 3.
The axial width of the annulus 33 of the axial width of the engaging protuberance 34 of the bulge size of the engaging protuberance 24 of the axial width of connecting member 20, upper axle pivot hub 21, rotating shaft pivot hub 22 and rotating shaft pivot hub 22 is roughly the same.In addition, the external diameter of the flange part 39 of the external diameter of the annulus 41 of connecting member 20 and rotating shaft pivot hub 22 is roughly the same, and the internal diameter of the circle of the face of the circle of internal diameter and the face that engages protuberance 24 outer circumferential sides by upper axle pivot hub 21 and engaging protuberance 34 outer circumferential sides by rotating shaft pivot hub 22 is roughly the same.
Below, illustrate and utilize shaft coupling 10 with the method for upper axle 5 and rotating shaft 3a link.
At first, in the patchhole 36 of rotating shaft pivot hub 22, insert rotating shaft 3a, in the screwed hole 37 of rotating shaft pivot hub 22, be screwed into screw 38, thereby rotating shaft pivot hub 22 is fixed on the rotating shaft 3a.
Then, make the engaging protuberance 34 of rotating shaft pivot hub 22 chimeric with the chimeric recess 43 of connecting member 20.And, rotating shaft pivot hub 22 is embedded in connecting member 20, until till the flange part 39 and connecting member 20 butts of rotating shaft pivot hub 22.Thus, the annulus 33 of rotating shaft pivot hub 22 and engaging protuberance 34 are housed in the annulus 41 of connecting member 20, and the outside of annulus 33 and engaging protuberance 34 is covered by annulus 41.
In addition, at this moment, flange part 39 and connecting member 20 butts by making rotating shaft pivot hub 22, thus restricting rotation axle pivot hub 22 and connecting member 20 relatively moving vertically positions rotating shaft pivot hub 22 and connecting member 20.
Then, the engaging protuberance 24 that makes axle pivot hub 21 and empty chimeric recess 43 are chimeric and be pressed into.Thus, in the chimeric recess 43 of connecting member 20, the engaging protuberance of the engaging protuberance 24 of upper axle pivot hub 21 and rotating shaft pivot hub 22 34 embeds alternately along Zhou Fangxiang, via connecting member 20 upper axle pivot hub 21 and rotating shaft pivot hub 22 is linked.That is, upper axle pivot hub 21 and rotating shaft pivot hub 22 are chimeric with connecting member 20 on Zhou Fangxiang, with the holding section 42 of clamping connecting member 20 between the 1st engaging protuberance 24 and the 2nd engaging protuberance 34.And, the rotating shaft 3a that becomes at motor 3 installed rotating shaft pivot hub 22, connecting member 20 and on the state of axle pivot hub 21.
In addition, also can after connecting member 20 is installed axle pivot hub 21, connecting member 20 be installed on the rotating shaft pivot hub 22.
Then, on one side insert upper axle 5, the motor 3 of the configuration of the regulation installation site on sewing machine stand 2 on one side in the patchhole 26 of upward axis pivot hub 21.
Then, in the screwed hole 27 of upper axle pivot hub 21, be screwed into screw 28, upper axle pivot hub 21 is fixed on the upper axle 5.
By said method, utilize shaft coupling 10 that the rotating shaft 3a of upper axle 5 and motor 3 is linked.
If use shaft coupling 10 as noted above links upper axle 5 and rotating shaft 3a, even then upper axle 5 has different diameters with rotating shaft 3a, also upper axle 5 and rotating shaft 3a can be linked.In addition, even produce in the situation of skew at the axis of upper axle 5 and the axis of rotating shaft 3a, also can utilize the connecting member 20 that is consisted of by elastomeric material to absorb this skew.
In addition, each holding section 42 of connecting member 20, the engaging protuberance 24 of axle pivot hub 21 and engaging protuberance 34 clampings of rotating shaft pivot hub 22 on quilt on the Zhou Fangxiang.Therefore, connecting member 20 is kept reliably by upper axle pivot hub 21 and rotating shaft pivot hub 22.
In addition, according to the Sewing machines 1 with said structure, because annulus 33 and the engaging protuberance 34 of rotating shaft pivot hub 22 is housed in the inboard of the annulus 41 of connecting member 20, so can suppress the axial dimension of shaft coupling 10.In addition, because the structure that to be a plurality of holding sections 42 of making connecting member 20 protrude to radially inner side from the inner peripheral surface of annulus 41, so can guarantee with the degree that obtains abundant intensity axial dimension and the radial dimension of annulus 41.That is, can guarantee the durability of shaft coupling 10, and suppress the axial dimension of shaft coupling.In addition, owing to can being independent of belt wheel 9 miscellaneous parts such as grade shaft coupling 10 is set, so can improve the versatility of shaft coupling 10.
In addition, because the screwed hole 37 of rotating shaft pivot hub 22 is formed on the engaging protuberance 34 and annulus 33 of annulus 41 coverings that are bonded parts 20, so compare with the structure that forms screwed hole 37 at the part place that is offset vertically with respect to connecting member 20, can reduce the axial dimension of shaft coupling 10.
And, by rotating shaft pivot hub 22 is embedded connecting member 20, so that the flange part of rotating shaft pivot hub 22 39 and connecting member 20 butts, thereby restricting rotation axle pivot hub 22 and connecting member 20 axially on relatively move, can easily be rotated the location between axle pivot hub 22 and the connecting member 20.
Based on Fig. 6 to Fig. 9, the 2nd embodiment of the present invention is described.
In the 2nd embodiment, the motor 3 that is configured in the sewing machine stand outside links with upper axle 5 via motor erecting bed 61, shaft coupling 10.
In the 2nd embodiment, illustrate and use the shaft coupling 10 identical with the 1st embodiment, use the situation of shaft coupling 10 at existing sewing machine stand.Therefore, omit the detailed description of shaft coupling 10, different parts only is described.
As shown in Figure 6, in the related Sewing machines 51 of the 2nd embodiment, in the arranged outside of vertical body 2b of section of sewing machine stand 2 motor 3 is arranged.The place, installation position of the motor 3 in vertical body 2b of section of sewing machine stand 2 forms peristome (omitting diagram), and upper axle 5 extends to peristome.
As shown in Figures 7 and 8, motor 3 is fixed on vertical body 2b of section of sewing machine stand 2 via motor erecting bed 61.
As shown in Figure 9, motor erecting bed 61 has embedded hole 62.Annular projection 54 in embedded hole 62 on the edge of the chimeric peristome that is formed at vertical body 2b of section.The part of annular projection 54 is cut (with reference to Fig. 8).In addition, motor erecting bed 61 has recess 63, and it is formed on installs motor 3 these sides.The part of chimeric motor 3 in recess 63.
On motor erecting bed 61, the position is formed for motor erecting bed 61 is fixed on fixing hole 64 on the sewing machine stand near the edge of embedded hole 62.In addition, form the fixing screwed hole 65 of using in the outside of fixing hole 64.Should be fixing with screwed hole 65 utilize not shown screw with motor 3 to motor erecting bed 61 use fixedly the time.In addition, on motor erecting bed 61, the side installing to sewing machine stand 2 forms the notch 66 (the 2nd notch) that is communicated with embedded hole 62.
Below, the method that motor 3 is installed at vertical body 2b of section of sewing machine stand 2 is described.
At first, the annular projection 54 of chimeric vertical body 2b of section in the embedded hole 62 of motor erecting bed 61 is configured in motor erecting bed 61 assigned position of vertical body 2b of section.At this moment, align at Zhou Fangxiang in the position of the notch of the position of the notch 66 of motor erecting bed 61 and annular projection 54 (the 1st notch).Then, screw (omit diagram) passed fixing hole 64 and be screwed into to the screwed hole (omitting diagram) of vertical body 2b of section, motor erecting bed 61 is fixed on vertical body 2b of section.
Then, will rotating shaft 3a be equipped with rotating shaft pivot hub 22, connecting member 20 and on the motor 3 of axle pivot hub 21, chimeric in the recess 63 of motor erecting bed 61, so that upper axle 5 inserts in the patchhole 26 of upper axle pivot hub 21, make the flange 3c and motor erecting bed 61 butts that are arranged on the motor 3.In addition, in the screwed hole 27 of upper axle pivot hub 21, relatively shallowly be screwed in advance screw 28.
Under this state, make screw (omit diagram) pass the patchhole 3d that is formed on the flange 3c, fixing with being screwed in the screwed hole 65 to motor erecting bed 61, fixed motor 3 on motor erecting bed 61.
Then, flywheel 4 is rotated, make the position of each screwed hole 27 of axle pivot hub 21 aim at seriatim the notch 66 of motor erecting bed 61, the instrument such as insertion screwdriver in the notch 66 overlapping screwdrivers behaviour functional holes that form of the notch by making annular projection 54 and motor erecting bed 61 on one side, screw 28 is fastening, fix axle pivot hub 21 at upper axle 5.
According to this Sewing machines 51, owing to do not change the Basic Design of existing sewing machine stand, and can use this existing sewing machine stand, so can significantly suppress manufacturing cost.In addition, shaft coupling 10 links rotating shaft 3a and the upper axle 5 of motor 3 in the outside of the vertical 2b of body section, owing to suppressed the axial dimension of shaft coupling 10, so also can suppress as far as possible the size of Sewing machines 51 integral body.
In addition, in the above-described embodiment, the annulus 33 and the engaging protuberance 34 that constitute the rotating shaft pivot hub 22 on the rotating shaft 3a that will be fixed in motor 3 are housed in the annulus 41 of connecting member 20, but also the structure of upper axle pivot hub 21 and the structure of rotating shaft pivot hub 22 can be put upside down, constitute annulus and the engaging protuberance that to be fixed in the upper axle pivot hub on the upper axle 5 and be housed in the annulus 41 of connecting member 20.
Below, based on Figure 10, the 3rd embodiment of the present invention is described.
In the 3rd embodiment, because only the structure of shaft coupling 10 is different from the 1st embodiment, other structures are identical, so different structures only is described, omit other explanation.
In the connecting member 20 of the 1st embodiment, 6 holding sections 42 configure towards 60 ° of pivot each intervals from annulus 41.Therefore, as shown in Figure 5, connecting member 20 is with respect to the left-right symmetry by the center line of above-below direction.In addition, the engaging protuberance 24 of upper axle pivot hub 21 forms with respect to 120 ° of parts pivot each intervals.In addition, in rotating shaft pivot hub 22, engaging protuberance 34 forms across 120 ° each other with respect to the parts pivot.Therefore, upper axle pivot hub 21 and rotating shaft pivot hub 22 can obtain 3 chimeric positions of link each other with respect to connecting member 20 across 120 °.
Relative therewith, the connecting member 100 of the shaft coupling of formation the 3rd embodiment shown in Figure 10, the shape of change holding section asymmetricly forms with respect to the datum line Y of the above-below direction by pivot.Connecting member 100 is formed by the rubber elastomeric material.Connecting member 100 has the annulus 101 of the ring-type of forming.In addition, annulus 101 has the holding section 102 of protruding from the inner peripheral surface of annulus 101 to radially inner side.Holding section 102 is made of the 1st holding section 102a, the 2nd holding section 102b, the 3rd holding section 102c, the 4th holding section 102d, the 5th holding section 102e that form along clockwise direction successively with respect to datum line Y position from zero time.The 1st holding section 102a is with the side cut-away of the counter clockwise direction side of its leading section.Positions after mobile along clockwise direction with each 60 degree from the 1st holding section 102a form the 2nd holding section 102b, the 3rd holding section 102c, the 4th holding section 102d of same shape towards pivot from annulus 101.
Form the 5th holding section 102e in the position behind the 4th holding section 102d 90-degree rotation.The 5th holding section 102e is made of forniciform the 5th holding section 102eb of embedded hole 102ea and encirclement embedded hole 102ea.
Upper axle pivot hub 103 (the 1st pivot hub) at the shaft coupling of formation shown in Figure 10 the 3rd embodiment has: the annulus 104 (the 1st annulus) that forms ring-type; And a plurality of snap fit tabs 105 (the 1st engaging protuberance), it protrudes vertically from annulus 104 sides relative with rotating shaft pivot hub 106.
Snap fit tabs 105 has 3 the 1st snap fit tabs 105a, the 2nd snap fit tabs 105b, the 3rd snap fit tabs 105c along clockwise direction.
The 1st snap fit tabs 105a and the 2nd snap fit tabs 105b are the identical shaped of chevron, and the 3rd snap fit tabs 105c is circular shape.The 1st snap fit tabs 105a of upper axle pivot hub 103 is embedded between the 1st holding section 102a, the 2nd holding section 102b of connecting member 100.In addition, the 2nd snap fit tabs 105b is embedded between the 3rd holding section 102c and the 4th holding section 102d.In addition, the 3rd snap fit tabs 105c of upper axle pivot hub 103 is embedded among the embedded hole 102ea of the 5th holding section of connecting member 100.
The rotating shaft pivot hub 106 of the shaft coupling of formation the 3rd embodiment shown in Figure 10 (the 2nd pivot hub) has: annulus 107 (the 2nd annulus); A plurality of snap fit tabs 108 (the 2nd engaging protuberance), its outer peripheral face from annulus 107 protrudes to radial outside; And flange part 109, its diameter is larger than snap fit tabs 108, supporting jointing parts 100.
Snap fit tabs 108 forms the 1st snap fit tabs 108a, the 2nd snap fit tabs 108b, the 3rd snap fit tabs 108c along clockwise direction.The 1st snap fit tabs 108a is asymmetric, and side is gently crooked and form.In addition, the 2nd snap fit tabs 108b and the 3rd snap fit tabs 108c are identical shaped.The 1st snap fit tabs 108a is embedded between the 5th holding section 102e and the 1st holding section 102a of connecting member 100.In addition, the 2nd snap fit tabs 108b is embedded between the 2nd holding section 102b and the 3rd holding section 102c of connecting member 100.In addition, the 3rd snap fit tabs 108c is embedded between the 4th holding section 102d and the 5th holding section 102e of connecting member 100.
In addition, in the 3rd embodiment, for rotating shaft pivot hub 106 being fixed on the rotating shaft 3a of motor 3, only the 1st snap fit tabs 108a has the screwed hole that radially runs through towards the 2nd patchhole 36.In addition, gently cut and the D type cutting part place that obtains and screw butt from the 1st snap fit tabs 108a at the rotating shaft 3a with motor 3, rotating shaft pivot hub 106 is fixed on assigned position with respect to rotating shaft 3a.
Namely, a plurality of holding sections 102 of connecting member 100 asymmetricly form about with respect to the datum line Y of the above-below direction at the center by connecting member 100, the snap fit tabs 105 of the 1st pivot hub 103 and the snap fit tabs 108 of the 2nd pivot hub 106, to form with a plurality of holding sections 102 corresponding staggered chimeric modes of connecting member 100, the 1st pivot hub 103 and the 2nd pivot hub 106 are installed on the connecting member 100 with predetermined angular.
As noted above, in the shaft coupling of the 3rd embodiment, upper axle pivot hub 103 and rotating shaft pivot hub 106 only are equivalent to connecting member 100 and install, are entrenched in assigned position.Therefore, after being decomposed, assembles when adjusting by motor, as long as keep the fixing of axle 5 and upper axle pivot hub 103, then rotating shaft 3a can assemble in identical position with upper axle 5, therefore, can easily reproduce the phase place of motor 3 and upper axle 5, improve workability.
Below, based on Figure 11, the 4th embodiment of the present invention is described.
In addition, only the explanation part different from the 1st embodiment for identical part, only marks label, and description thereof is omitted.
The upper axle pivot hub 110 (the 1st pivot hub) of the 4th embodiment is parts, forms bearing from upper axle side and is pressed into the 110a of section, the toothed driving belt 110b of section, engaging protuberance 110c.
Bearing is pressed into the interior perimembranous that the 110a of section is embedded in bearing 111.The peripheral support of bearing 111 is on not shown sewing machine stand.
The toothed driving belt 110b of section forms tooth section in periphery.Belt wheel 13 in this toothed driving belt 110b of section and base portion sets up Timing Belt 14, and the rotation of upper axle 5 is transmitted to lower shaft 12.
Because engaging protuberance 110c is shaped as the shape identical with the engaging protuberance 24 of the 1st embodiment, so description thereof is omitted.
In the 4th embodiment, upper axle pivot hub 110 has the toothed driving belt 110b of section, have to the function of lower shaft 12 transmission of drive force, therefore, can further shorten the interval of needle bar 8 and motor 3 and the interval of needle bar 8 and flywheel 4, workability when therefore, improving operating personnel's manual operation flywheel.
In addition, above-mentioned upper axle pivot hub 110 is parts, forms bearing and is pressed into the 110a of section, the toothed driving belt 110b of section, engaging protuberance 110c.Also can replace, the toothed driving belt 110b of section is made of miscellaneous part, chimeric and utilize screw to fix with the assigned position of upper axle pivot hub 110.
In addition, by adopting following structure, that is, on upper axle pivot hub 110, only form bearing and be pressed into the 110a of section, and chimeric with bearing bore diameter, thereby also can shorten interval between needle bar 8 and the flywheel 4.
In addition, in the Sewing machines 1 of above-mentioned the 1st embodiment, at the outer setting motor 3 of sewing machine stand 2, but also can as shown in figure 12, the rotating shaft 3a of motor 3 and upper axle 5 be linked via shaft coupling 10.
In the above-described embodiment, the 1st pivot hub 21 is fixed on the upper axle 5, the 2nd pivot hub 22 is fixed on the rotating shaft 3a of motor, thereby upper axle 5 and rotating shaft 3a are linked.Also can replace, the 1st pivot hub 21 is fixed on the rotating shaft 3a of motor, the 2nd pivot hub 22 is fixed on the upper axle 5, thereby upper axle 5 and rotating shaft 3a are linked.
Claims (7)
1. Sewing machines, it has:
Upper axle;
The needle bar driving mechanism, its rotation by described upper axle moves up and down needle bar;
Motor, it has rotating shaft; And
Shaft coupling, it links described rotating shaft and described upper axle,
Described shaft coupling has:
The 1st pivot hub, it is fixed on in described upper axle and the described rotating shaft one, have the 1st annulus, a plurality of the 1st engaging protuberance, reach the 1st patchhole, these a plurality of the 1st engaging protuberances protrude vertically from the side of the 1st annulus, arrange across the interval along Zhou Fangxiang, the 1st patchhole makes the described insertion in described upper axle and the described rotating shaft;
The 2nd pivot hub, it is fixed on in described upper axle and the described rotating shaft another, have the 2nd annulus, a plurality of the 2nd engaging protuberance, reach the 2nd patchhole, these a plurality of the 2nd engaging protuberances protrude to radial outside from the outer peripheral face of the 2nd annulus, arrange across the interval along Zhou Fangxiang, the 2nd patchhole makes described another insertion in described upper axle and the described rotating shaft; And
Connecting member, it is formed by elastomeric material, has a plurality of holding sections that arrange across the interval along Zhou Fangxiang,
Described the 1st pivot hub and described the 2nd pivot hub and described connecting member are chimeric, with on Zhou Fangxiang, and the holding section of the described connecting member of clamping between described the 1st engaging protuberance and described the 2nd engaging protuberance,
It is characterized in that,
Described connecting member has the annulus of the ring-type of forming,
Protrude to radially inner side from the inner peripheral surface of described annulus described a plurality of holding section,
Described the 2nd annulus and described a plurality of the 2nd engaging protuberance embed the inboard of described annulus and are accommodated.
2. Sewing machines according to claim 1 is characterized in that,
The screwed hole that described the 2nd pivot hub radially runs through till having from described the 2nd engaging protuberance to described the 2nd patchhole,
Utilization is screwed into the screw to the screwed hole, described on another on described in axle and the described rotating shaft, fixing described the 2nd pivot hub.
3. Sewing machines according to claim 2 is characterized in that,
Described the 1st pivot hub is fixed on the described upper axle,
Described the 2nd pivot hub is fixed on the described rotating shaft,
Described the 2nd pivot hub has flange part, its vertically with described connecting member butt.
4. Sewing machines according to claim 3 is characterized in that,
Described a plurality of the 1st engaging protuberances of described the 1st pivot hub embed and are housed in the inboard of described annulus,
The screwed hole that described the 1st pivot hub radially runs through till having from described the 1st annulus to described the 1st patchhole,
The screw that utilization is screwed in the described screwed hole is fixed on described the 1st pivot hub on the described upper axle.
5. Sewing machines according to claim 4 is characterized in that,
A plurality of holding sections of described connecting member with respect to the datum line of the above-below direction at the center by described connecting member and about asymmetricly form,
The 2nd snap fit tabs of the 1st snap fit tabs of described the 1st pivot hub and described the 2nd pivot hub forms, and is corresponding and chimeric alternately with a plurality of holding sections of described connecting member, and described the 1st pivot hub and the 2nd pivot hub are installed on the described connecting member with the angle of regulation.
6. each described Sewing machines in 5 according to claim 1 is characterized in that,
Also have the motor erecting bed, it is installed in the vertical body section of sewing machine stand,
Described motor is via described motor erecting bed, is installed in the outside of described vertical body section,
Described shaft coupling is in the outside of described vertical body section, and rotating shaft and the described upper axle of described motor linked.
7. Sewing machines according to claim 6 is characterized in that,
Have annular projection, it forms from the sewing machine stand projection, has the 1st notch in its periphery,
Described motor erecting bed has the 2nd notch,
When being installed on described motor erecting bed on the described annular projection, the position of the position of the 1st notch and the 2nd notch is consistent on Zhou Fangxiang.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110209070.4A CN102888722B (en) | 2011-07-22 | 2011-07-22 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110209070.4A CN102888722B (en) | 2011-07-22 | 2011-07-22 | Sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102888722A true CN102888722A (en) | 2013-01-23 |
| CN102888722B CN102888722B (en) | 2018-02-16 |
Family
ID=47532392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110209070.4A Active CN102888722B (en) | 2011-07-22 | 2011-07-22 | Sewing machine |
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| Country | Link |
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| CN (1) | CN102888722B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486143A (en) * | 2013-08-23 | 2014-01-01 | 翟俊龙 | Radial spherical plain bearing coupling |
| CN106471173A (en) * | 2014-07-29 | 2017-03-01 | 金光沿 | The bearing arrangement of sewing machine upper shaft |
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| CN2573525Y (en) * | 2002-09-29 | 2003-09-17 | 上工股份有限公司 | Sewing machine motor coupling |
| US6648763B2 (en) * | 2000-09-14 | 2003-11-18 | The Falk Corporation | Reduction of axial thrust reaction in toothed shear-type flexible couplings |
| CN101523069A (en) * | 2006-10-14 | 2009-09-02 | 皮尔伯格有限责任公司 | Coupling device |
| CN101581015A (en) * | 2008-05-15 | 2009-11-18 | 上海贵衣缝纫设备有限公司 | Direct-drive oil parallel sewing machine |
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|---|---|---|---|---|
| US3396556A (en) * | 1966-09-06 | 1968-08-13 | Lovejoy Flexible Coupling Comp | Flexible coupling |
| CN1083187A (en) * | 1992-08-21 | 1994-03-02 | 株式会社凯塞文 | coupling |
| US6648763B2 (en) * | 2000-09-14 | 2003-11-18 | The Falk Corporation | Reduction of axial thrust reaction in toothed shear-type flexible couplings |
| CN2573525Y (en) * | 2002-09-29 | 2003-09-17 | 上工股份有限公司 | Sewing machine motor coupling |
| CN101523069A (en) * | 2006-10-14 | 2009-09-02 | 皮尔伯格有限责任公司 | Coupling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486143A (en) * | 2013-08-23 | 2014-01-01 | 翟俊龙 | Radial spherical plain bearing coupling |
| CN106471173A (en) * | 2014-07-29 | 2017-03-01 | 金光沿 | The bearing arrangement of sewing machine upper shaft |
| CN106471173B (en) * | 2014-07-29 | 2020-04-03 | 金光沿 | Bearing device of upper shaft of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102888722B (en) | 2018-02-16 |
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