CN204058912U - The Sewing machines that needle bar stroke is adjustable - Google Patents
The Sewing machines that needle bar stroke is adjustable Download PDFInfo
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- CN204058912U CN204058912U CN201420441775.8U CN201420441775U CN204058912U CN 204058912 U CN204058912 U CN 204058912U CN 201420441775 U CN201420441775 U CN 201420441775U CN 204058912 U CN204058912 U CN 204058912U
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- axle
- connecting rod
- crank
- shank
- needle bar
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Abstract
The utility model discloses the Sewing machines that a kind of needle bar stroke is adjustable, comprise shank, connecting rod, crank, main shaft and motor, also comprise eccentric ratio pin, described eccentric ratio pin, small end is connected with crank through eccentric ratio pin, small end end is provided with an axially extending bore, first axle is rotatably assorted in the axially extending bore of connecting rod, the outer end of the first axle is axially bolted with adjustment screw, and be lined with the spacing shim preventing small end axial float, the axial head left cover stretching out place of adjustment screw is provided with is convenient to the screw that adjustment screw is twisted in screwdriver insertion.The utility model has adjustable needle bar stroke, simplifies regulative mode, possesses the advantages such as fuel-economizing.The utility model belongs to sewing machine technique field.
Description
Technical field
The utility model belongs to sewing machine technique field, and more particularly, it relates to the adjustable Sewing machines of a kind of needle bar stroke.
Background technology
One or more sewing thread used by Sewing machines, and sewing is formed one or more stitchings, makes the machine that one or more layers sewing interweaves or unites by a seam.Sewing function makes the goods such as the fabrics such as cotton, fiber crops, silk, hair, artificial fibre and leather, plastics, paper, and the stitching neat appearance of stitching out, firmly smooth, sewing velocity is fast, easy to use.General Sewing machines is all made up of head, support, transmission and annex four part.Head is the major part of Sewing machines, and it forms by stinging material, hook line, take-up, feeding four mechanisms and coiling, binder, Luo Yadeng auxiliary body, and the motion of each mechanism reasonably coordinates, and periodic duty unites by a seam sewing.
Needle bar stroke mechanism on existing Sewing machines comprises the shank be arranged on head of sewing machine, connecting rod, crank and main shaft, main shaft is arranged on it sewing machine, one end of main shaft is connected with crank by bearing, the other end is connected with motor by Timing Belt, connecting rod one end is connected with crank, and the other end is connected with shank; By the rotation of driven by motor main shaft, the rotation of main shaft drives crank, and crank handle turns connecting rod moves up and down, and because connecting rod is connected with shank, thus realizes the reciprocating motion that shank does vertical direction.
Needle bar stroke refers to that shank in the vertical direction is raised to peak and drops to the displacement between minimum point, and as can be seen from above-mentioned mechanism, shank in the vertical direction is raised to peak and drops to minimum point these 2 and cannot change, that is needle bar stroke is fixing, cannot regulate.Sewing machines is in the use procedure of reality, the thickness of sewing cloth is not identical, and the needle bar stroke of Sewing machines is closely bound up with the thickness of sewing cloth, therefore existing Sewing machines limit that machine is thin to a certain extent and expect in thick material conversion time the scope of application.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is the Sewing machines providing a kind of needle bar stroke adjustable, can realize the adjustable of needle bar stroke, convenient when regulating simultaneously.
For achieving the above object, the utility model provides following technical scheme: the Sewing machines that a kind of needle bar stroke is adjustable, comprise the shank be arranged on head of sewing machine, connecting rod, crank, main shaft and motor, main shaft is arranged on it sewing machine, one end of main shaft is connected with crank by bearing, the other end is connected with motor by Timing Belt, and small end is connected with crank, and lower end is connected with shank; By the rotation of driven by motor main shaft, the rotation of main shaft drives crank, crank handle turns link rotatable, and shank is followed connecting rod and realized pumping; Also comprise eccentric ratio pin, described small end is connected with crank through eccentric ratio pin, and described eccentric ratio pin is removable to be arranged on crank.
Described eccentric ratio pin is axially connected to form by the first axle, partially dish, the second axle, the axis of the first axle and the second axle axis not conllinear, partially coils circumferentially any point is all greater than the first axle and the second axle diameter to the horizontal range of inclined disk center; Small end end is provided with an axially extending bore, first axle is rotatably assorted in the axially extending bore of connecting rod, the outer end of the first axle is axially bolted with adjustment screw, and being lined with the spacing shim preventing small end axial float, the axial head left cover stretching out place of adjustment screw is provided with is convenient to the screw that adjustment screw is twisted in screwdriver insertion; Second axle is connected with crank is removable, inclined dish circumference is by end to end orthodrome, left straight line, small arc-shaped, right rectilinear(-al), small arc-shaped radius is less than large circular arc radius, eccentric ratio pin is arranged on after on crank, there is a limiting platform face below that crank is coiling partially, and the left straight line of dish or the limiting platform face of right straight line and crank offset partially.
First axle is rotatably assorted and refers to that the first axle sleeve has needle bearing in the axially extending bore of connecting rod, needle bearing is engaged in the axially extending bore of small end, small end portion is provided with the oil-feed groove be convenient to needle bearing fuel feeding, connecting rod is that hollow is arranged, the lower end of connecting rod is provided with an oil outlet, and oil outlet communicates with oil-feed groove; The side of connecting rod lower end is hinged with shank and pricks head, shank pricks the inside, lower end that head is plugged on connecting rod, shank is pricked head and is communicated with oil outlet, shank pricks head-clamp on shank, the hinged slide block of opposite side of connecting rod lower end, slide block side is provided with a slide, and slide is fixed in casing, slide is provided with a vertical chute, and slide block sliding fit is in the chute of slide.
Outside described shank top and bottom, all cover has copper sheathing, and copper sheathing is arranged on head top and the bottom of casing respectively.
With crank removable being connected, the second described axle refers to that crank has a circular fixture block, the opening part of circular fixture block is provided with bolt, and the second axle is positioned at the circular port of circular fixture block, realizes the clamping of circular fixture block or unclamp by bolt.
Small arc-shaped radian on described inclined dish is 90 °.
The first described axle is identical with the second shaft diameter.
1-2mm is differed between the axis of the first described axle and the second axle axis.
The beneficial effects of the utility model are:
1, between small end and crank, add eccentric ratio pin, one end of eccentric ratio pin is connected with connecting rod, and the other end is connected with crank, by rotating eccentric ratio pin, changing the radius of link rotatable, realizing the stroke adjustment of shank successively.
The circumference of the inclined dish 2, on eccentric ratio pin is divided into orthodrome, left straight line, small arc-shaped, right straight line, small arc-shaped radius is less than large circular arc radius, the orthodrome two ends of inclined dish coordinate the planar table on crank, achieve the spacing of two extreme positions, carry out the change of precision range successively.
3, adjustment screw is set outside the first axle of eccentric ratio pin, and in the head left cover at the axial place that stretches out of adjustment screw, be provided with screw, convenient screwdriver inserts screw and twists adjustment screw, eccentric ratio pin is driven to rotate, realize the change of needle bar stroke, this design enormously simplify the operation that existing needle bar stroke changes, and common operating personnel can regulate.
4, the first beam warp needle bearing of small end and eccentric ratio pin coordinates rotation, reduce fretting wear between the two, ensure degree of regulation, establish oil-feed groove in the upper end of connecting rod simultaneously, oilhole is set out in the lower end of connecting rod, realize the connection of oil circuit, the unnecessary lubricating oil in upper end flows to lower end and pricks head and slide block lubrication, the consumption of saving lubricating oil for the shank of lower end.
Accompanying drawing explanation
Fig. 1 is the utility model schematic perspective view.
Fig. 2 is A place enlarged drawing in Fig. 1.
Fig. 3 is the utility model side schematic view.
Fig. 4 is the side schematic view after the utility model removes left cover.
Fig. 5 is this crank and eccentric ratio pin connection diagram.
Fig. 6 is eccentric ratio pin schematic diagram.
Fig. 7 be needle bar stroke maximum time crank and eccentric ratio pin connection diagram.
Fig. 8 is A-A sectional view in Fig. 7.
Fig. 9 be needle bar stroke minimum time crank and eccentric ratio pin connection diagram.
Figure 10 is B-B sectional view in Fig. 9.
Figure 11 is for partially to coil schematic diagram.
Reference numeral: 1, head, 1.1, screw, 2, shank, 3, connecting rod, 3.1, axially extending bore, 3.2, oil-feed groove, 3.3, oil outlet, 4, crank, 4.1, limiting platform face, 4.2, bolt, 5, eccentric ratio pin, the 5.1, first axle, 5.2, partially coil, 5.2.1, orthodrome, 5.2.2, left straight line, 5.2.3, small arc-shaped, 5.2.4, right straight line, 5.3, the second axle, 6, adjustment screw, 7, spacing shim, 8, shank pricks head, 9, slide block, 10, slide, 10.1, chute, 11, copper sheathing.
Detailed description of the invention
The Sewing machines embodiment adjustable to the utility model needle bar stroke referring to figs. 1 through Figure 11 is described further.
Needle bar stroke in Sewing machines refers to that shank in the vertical direction is raised to peak and drops to the displacement between minimum point, and the shank in the vertical direction on existing Sewing machines is raised to peak and drops to minimum point these 2 and cannot change, that is needle bar stroke is fixing, cannot regulate.Sewing machines is in the use procedure of reality, and the thickness of sewing cloth changes again, so only have a kind of Sewing machines of needle bar stroke to adapt to, and can the Sewing machines of the metering needle throw of lever voluntarily as required so the utility model design is a.The Sewing machines that a kind of needle bar stroke is adjustable, comprise the shank 2 be arranged on head of sewing machine 1, connecting rod 3, crank 4, main shaft and motor, main shaft is arranged on it sewing machine, one end of main shaft is connected with crank 4 by bearing, the other end is connected with motor by Timing Belt, connecting rod 3 upper end is connected with crank 4, and lower end is connected with shank 2; By the rotation of driven by motor main shaft, the rotation of main shaft drives crank 4 to rotate, and crank 4 drivening rod 3 rotates, and shank 2 is followed connecting rod 3 and realized pumping.
In order to the adjustment of shank 2 stroke can be realized, the utility model also comprises eccentric ratio pin 5, described eccentric ratio pin 5 is removable to be arranged on crank 4, refer to be that eccentric ratio pin 5 has multiple installation site on crank 4, when so also just meaning that eccentric ratio pin 5 rotates, there is the different radiuses of gyration.Described eccentric ratio pin 5 by the first axle 5.1, partially coil the 5.2, second axle 5.3 and be axially connected to form, the first axle 5.1 is positioned at the side of dish 5.2 partially, and the second axle 5.3 is positioned at the opposite side of dish 5.2 partially, and three is integrated.
So-called bias, refer to axis and the second axle 5.3 axis not conllinear of the first axle 5.1, that is the axis of the first axle 5.1 and the design of the second axle 5.3 eccentric axis, axis between the two has certain deviation, such design is exactly the radius of gyration (because the upper end of connecting rod 3 is connected with the first axle 5.1) in order to change connecting rod 3 upper end, also just mean that connecting rod 3 peaks and distance between minimum point adds, and shank 2 is connected with connecting rod 3, so shank 2 peaks and distance between minimum point too increases, namely the stroke of shank 2 adds, the cloth of different-thickness can be adapted to.
In order to ensure that dish 5.2 can play the position-limiting action of eccentric ratio pin 5 at two extreme positions partially, inclined dish 5.2 circumferentially any point is all greater than the diameter of the first axle 5.1 and the second axle 5.3 to the horizontal range at Pian Pan 5.2 center, the diameter of inclined dish 5.2 mentioned here also refers to that minimum diameter is all large than the diameter of the first axle 5.1 and the second axle 5.2; Connecting rod 3 upper end is connected with crank 4 through eccentric ratio pin 5, and end, connecting rod 3 upper end is provided with an axially extending bore 3.1, first axle 5.1 and is rotatably assorted in the axially extending bore 3.1 of connecting rod 3, and the second axle 5.3 is connected with crank 4 is removable.
In order to the stroke of shank 2 conveniently can be regulated, the utility model is specially axially bolted with adjustment screw 6 in the outer end of the first axle 5.1, and being lined with the spacing shim 7 preventing connecting rod 3 top axial play, axial head 1 left cover stretching out place of adjustment screw 6 is provided with is convenient to the screw 1.1 that adjustment screw 6 is twisted in screwdriver insertion; Only need screwdriver to insert in the screw 1.1 of head 1 left cover, turn adjustment screw 6, clockwise or rotate counterclockwise, just can the rotation of straight line eccentric ratio pin 5, realize the change of the connecting rod 3 upper end radius of gyration, the stroke also just achieving shank 2 changes.So offer screw 1.1 in head 1 left cover, when adjustment stroke, do not need to take head 1 cover and miscellaneous part apart, just can realize the adjustment of stroke, very convenient, and concerning regulate operating personnel, do not need very professional, common machinist can adjust, adaptability and convenience wide.
The limit function of its two extreme positions is realized in order to dish 5.2 partially can be allowed, inclined dish 5.2 circumference is made up of end to end orthodrome 5.2.1, left straight line 5.2.2, small arc-shaped 5.2.3, right straight line 5.2.4, small arc-shaped 5.2.3 radius is less than orthodrome 5.2.1 radius, eccentric ratio pin 5 is arranged on after on crank 4, there is a limiting platform face 4.1 below that crank 4 is coiling 5.2 partially, and the dish left straight line 5.2.2 of 5.2 or the limiting platform face 4.1 of right straight line 5.2.4 and crank 4 offset partially.When stroke is in maximum, the dish left straight line 5.2.2 of 5.2 and the limiting platform face 4.1 of crank 4 offset partially.When stroke is in minimum, partially dish 5.2 or the limiting platform face 4.1 of right straight line 5.2.4 and crank 4 offset.
Small arc-shaped 5.2.3 radian on inclined dish 5.2 is 90 °, that is partially coils 5.2 and rotates 90 °, just can realize the change that shank 2 stroke is minimum and maximum.
In order to reduce the friction between the first axle 5.1 and the axially extending bore 3.1 of connecting rod 3, also tightness and service life is joined in order to improve to turn, first axle 5.1 cover has needle bearing, needle bearing is engaged in the axially extending bore 3.1 of connecting rod 3 upper end, connecting rod 3 upper end is provided with the oil-feed groove 3.2 be convenient to needle bearing fuel feeding, connecting rod 3 is arranged in hollow, and the lower end of connecting rod 3 is provided with an oil outlet 3.3, and oil outlet 3.3 communicates with oil-feed groove 3.2; The side of connecting rod 3 lower end is hinged with shank and pricks 8, shank pricks 8, and to be plugged on the lower end of connecting rod 3 inner, shank pricks a 8 connection oil outlet 3.3, shank is pricked 8 and is clipped on shank 2, the hinged slide block 9 of opposite side of connecting rod 3 lower end, slide block 9 side is provided with a slide 10, and slide 10 is fixed in casing, slide 10 is provided with a vertical chute 10.1, and slide block 9 sliding fit is in the chute 10.1 of slide 10.Oil-feed groove 3.2 is established in the upper end of connecting rod 3, sets out oilhole 3.3 in the lower end of connecting rod 3, realizes the connection of oil circuit, the unnecessary lubricating oil in upper end flow to lower end for the shank of lower end prick 8 and slide block 9 lubricate, the consumption of saving lubricating oil.
In order to reduce the friction between shank 2 and casing, ensure the service life of shank 2, outside shank 2 top and bottom, all cover has copper sheathing 11, and copper sheathing 11 is arranged on head 1 top and the bottom of casing respectively.
For the ease of the adjustment of eccentric ratio pin 5, described eccentric ratio pin 5 is removable to be arranged on crank 4, that is the second axle 5.3 is connected with crank 4 is removable, refer to that crank 4 has a circular fixture block, the opening part of circular fixture block is provided with bolt 4.2, second axle 5.3 is positioned at the circular port of circular fixture block, realizes the clamping of circular fixture block or unclamp by bolt 4.2.The first described axle 5.1 is identical with the second axle 5.3 diameter.
1-2mm is differed between the axis of the first described axle 5.1 and the second axle 5.3 axis.1mm is differed between the axis of the first axle 5.1 and the second axle 5.3 axis in the present embodiment.The radius of gyration of connecting rod 3 upper end adds 1mm, and diameter is just the increase in 2mm, and the stroke of such shank 2 is equivalent to add 2mm.
Operation principle of the present utility model is: if the stroke of the shank 2 of original state is minimum, as shown in Figure 9 and Figure 10, when the cloth that thickness of sewing is thicker, need to increase needle bar stroke, operate as follows: first unclamp the bolt 4.2 on crank 4, so eccentric ratio pin 5 is just rotatable, the screw 1.1 of head 1 left cover is inserted again by screwdriver, end and the adjustment screw 6 of screwdriver match, adjustment screw 6 is driven to rotate counterclockwise, the rotation of adjustment screw 6, drive rotating counterclockwise of eccentric ratio pin 5, the rotation of eccentric ratio pin 5, inclined dish 5.2 also follows rotation, the left end of the orthodrome 5.2.1 on inclined dish 5.2 on circumference rotates until encounter the limiting platform face 4.1 on crank 4, as shown in Figure 7 and Figure 8, now the axis of the first axle 5.1 is higher than the axis of the second axle 5.3 1mm (eccentric throw set in the present embodiment), so the rotation diameter of the connecting rod 3 upper end 2mm that just become large, and needle bar stroke adds 2mm naturally, after adjustment completes, bolt 4.2 is tightened again, the second axle 5.3 is clamped.
If the stroke of the shank 2 of original state is the highest, above so similar, rotated clockwise by adjustment screw 6, until the right straight line 5.2.4 end partially coiling the orthodrome 5.2.1 side on 5.2 encounters limiting platform face 4.1, this first axle 5.1 and the second axle 5.3 are in same level, that is the axis of the first axle 5.1 and the second axle 5.3 axis are in same level, and reduced by the radius of gyration, needle bar stroke have also been smaller.
Certainly between two extreme positions rotated of eccentric ratio pin 5, also have multiple travel position, eccentric ratio pin 5 does not forward extreme position to and just stops in other words, and the present embodiment just schematically illustrates minimum and maximum stroke.
Claims (8)
1. the Sewing machines that a needle bar stroke is adjustable, comprise the shank (2) be arranged on head of sewing machine (1), connecting rod (3), crank (4), main shaft and motor, main shaft is arranged on it sewing machine, one end of main shaft is connected with crank (4) by bearing, the other end is connected with motor through Timing Belt, connecting rod (3) upper end is connected with crank (4), and lower end is connected with shank (2); By the rotation of driven by motor main shaft, the rotation of main shaft drives crank (4) to rotate, and crank (4) drivening rod (3) rotates, and shank (2) is followed connecting rod (3) and realized pumping; It is characterized in that: also comprise eccentric ratio pin (5), described connecting rod (3) upper end is connected with crank (4) through eccentric ratio pin (5), and described eccentric ratio pin (5) is removable to be arranged on crank (4).
2. the Sewing machines that needle bar stroke according to claim 1 is adjustable, it is characterized in that: described eccentric ratio pin (5) is axially connected to form by the first axle (5.1), partially dish (5.2), the second axle (5.3), the axis of the first axle (5.1) and the second axle (5.3) axis not conllinear, inclined dish (5.2) circumferentially any point is all greater than the diameter of the first axle (5.1) and the second axle (5.3) to the horizontal range of partially coiling (5.2) center, connecting rod (3) end, upper end is provided with an axially extending bore (3.1), first axle (5.1) is rotatably assorted in the axially extending bore (3.1) of connecting rod (3), the outer end of the first axle (5.1) is axially bolted with adjustment screw (6), and being lined with the spacing shim (7) preventing connecting rod (3) top axial play, axial head (1) left cover stretching out place of adjustment screw (6) is provided with is convenient to the screw (1.1) that adjustment screw (6) are twisted in screwdriver insertion, second axle (5.3) is connected with crank (4) is removable, inclined dish (5.2) circumference is by end to end orthodrome (5.2.1), left straight line (5.2.2), small arc-shaped (5.2.3), right straight line (5.2.4) forms, small arc-shaped (5.2.3) radius is less than orthodrome (5.2.1) radius, eccentric ratio pin (5) is arranged on after on crank (4), there is a limiting platform face (4.1) below that crank (4) is coiling (5.2) partially, the left straight line (5.2.2) of inclined dish (5.2) or right straight line (5.2.4) offset with the limiting platform face (4.1) of crank (4).
3. the Sewing machines that needle bar stroke according to claim 2 is adjustable, it is characterized in that: described the first axle (5.1) is rotatably assorted in the axially extending bore (3.1) of connecting rod (3), refers to that the first axle (5.1) cover has needle bearing, needle bearing is engaged in the axially extending bore (3.1) of connecting rod (3) upper end, connecting rod (3) upper end is provided with the oil-feed groove (3.2) be convenient to needle bearing fuel feeding, connecting rod (3) is arranged in hollow, the lower end of connecting rod (3) is provided with an oil outlet (3.3), oil outlet (3.3) communicates with oil-feed groove (3.2), the side of connecting rod (3) lower end is hinged with shank and pricks head (8), shank pricks the inside, lower end that head (8) is plugged on connecting rod (3), shank is pricked head (8) and is communicated with oil outlet (3.3), shank is pricked head (8) and is clipped on shank (2), the hinged slide block (9) of opposite side of connecting rod (3) lower end, slide block (9) side is provided with a slide (10), slide (10) is fixed in casing, slide (10) is provided with a vertical chute (10.1), slide block (9) sliding fit is in the chute (10.1) of slide (10).
4. the Sewing machines that the needle bar stroke according to Claims 2 or 3 is adjustable, it is characterized in that: outside described shank (2) top and bottom, all cover has copper sheathing (11), and copper sheathing (11) is arranged on head (1) top and the bottom of casing respectively.
5. the Sewing machines that needle bar stroke according to claim 2 is adjustable, it is characterized in that: with crank (4) removable being connected, described the second axle (5.3) refers to that crank (4) has a circular fixture block, the opening part of circular fixture block is provided with bolt (4.2), second axle (5.3) is positioned at the circular port of circular fixture block, is realized the clamping of circular fixture block by bolt (4.2) or is unclamped.
6. the Sewing machines that needle bar stroke according to claim 3 is adjustable, is characterized in that: small arc-shaped (5.2.3) radian on described inclined dish (5.2) is 90 °.
7. the Sewing machines that needle bar stroke according to claim 2 is adjustable, is characterized in that: described the first axle (5.1) is identical with the second axle (5.3) diameter.
8. the Sewing machines that needle bar stroke according to claim 2 is adjustable, is characterized in that: differ 1-2mm between the axis of described the first axle (5.1) and the second axle (5.3) axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420441775.8U CN204058912U (en) | 2014-07-29 | 2014-07-29 | The Sewing machines that needle bar stroke is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420441775.8U CN204058912U (en) | 2014-07-29 | 2014-07-29 | The Sewing machines that needle bar stroke is adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204058912U true CN204058912U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420441775.8U Withdrawn - After Issue CN204058912U (en) | 2014-07-29 | 2014-07-29 | The Sewing machines that needle bar stroke is adjustable |
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| Country | Link |
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| CN (1) | CN204058912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131422A (en) * | 2014-07-29 | 2014-11-05 | 新杰克缝纫机股份有限公司 | Sewing machine with adjustable needle bar stroke |
-
2014
- 2014-07-29 CN CN201420441775.8U patent/CN204058912U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131422A (en) * | 2014-07-29 | 2014-11-05 | 新杰克缝纫机股份有限公司 | Sewing machine with adjustable needle bar stroke |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20170503 |