CN204455536U - A kind of needle bar crank - Google Patents
A kind of needle bar crank Download PDFInfo
- Publication number
- CN204455536U CN204455536U CN201520032612.9U CN201520032612U CN204455536U CN 204455536 U CN204455536 U CN 204455536U CN 201520032612 U CN201520032612 U CN 201520032612U CN 204455536 U CN204455536 U CN 204455536U
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- China
- Prior art keywords
- crank
- projection
- needle bar
- bar crank
- arc
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- Expired - Fee Related
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Abstract
The utility model provides a kind of needle bar crank, belongs to sewing machine technique field.It solve that existing structure vibrations are excessive, the problem such as cause Sewing machines work vibration, noise large.This needle bar crank, comprise the crank body being provided with main shaft fixing hole, the upside of crank body is provided with shank engaging lug, the downside of crank body is provided with the projection in fan ring body shape, it is characterized in that: the leading flank of described projection is provided with arc-shaped shock-absorbing block protruding forward, the trailing flank of projection is provided with fan annular snubber block protruding backward.The utility model is applied on Sewing machines, and during Sewing machines work, overall vibrations are little, and the noise of generation is less, and it is more tranquil that user experiences sensation, is convenient to user and concentrates on sewing, the advantages such as the quality that raising is produced and efficiency.
Description
Technical field
The utility model belongs to sewing machine technique field, refers in particular to a kind of needle bar crank.
Background technology
Needle bar crank is the important parts of on Sewing machines, in Sewing machines work, and machine spindle driving needle pole crank, needle bar crank transmission needle bar of sewing machine.In existing structure, the structure of needle bar crank is all more similar, the governor motion of side cutter sewing machine trimming disclosed in Chinese patent literature, Authorization Notice No. (CN 202157182 U), it comprises needle bar crank, knife bar cam etc. assembly, see the structure of needle bar crank disclosed in its accompanying drawing, visible crank is provided with main shaft fixing hole and connecting rod fixing hole, is the structure of segment on the downside of crank, and for example a kind of needle bar crank for industrial sewing machine, Authorization Notice No. (CN 102828360A), it comprises a body, body comprises the base of a fan-shaped base and a quadrangle base composition, also comprise a hollow cylinder perpendicular to base, described hollow cylinder is used for preventing shank, described quadrangle base is arranged a fixing hole and an installing hole, above-mentioned the second structure is the one transformation of the first structure, make the installation of needle bar crank more firm by arranging hollow cylinder, above-mentioned two structures are needle bar crank common in prior art, but in the application of reality, there is the defect that vibrations are excessive, therefore the utility model shakes excessive problem for needle bar crank and innovates.
Summary of the invention
The purpose of this utility model is to provide a kind of needle bar crank, it improves the structural design of needle bar crank, changes the center of gravity of needle bar crank, add the bulk wight of needle bar crank, the Sewing machines making this needle bar crank of installation operationally, trembles little, noise also decreases, and reaches better result of use.
The purpose of this utility model is achieved in that
A kind of needle bar crank, comprise the crank body being provided with main shaft fixing hole, the upside of crank body is provided with shank engaging lug, the downside of crank body is provided with the projection in fan ring body shape, it is characterized in that: the leading flank of described projection is provided with arc-shaped shock-absorbing block protruding forward, the trailing flank of projection is provided with fan annular snubber block protruding backward.
In above-mentioned a kind of needle bar crank, the angle between the center line of the described projection in fan ring body shape and the vertical center line of crank body is at 5 ~ 25 degree.
In above-mentioned a kind of needle bar crank, the concrete structure that the leading flank of described projection is provided with arc-shaped shock-absorbing block protruding is forward: the downside of projection leading flank is raised with forward the balancing weight in crescent shape, arc-shaped shock-absorbing block in crescent shape is located at the leading flank of balancing weight, and the lower side of the lower side of arc-shaped shock-absorbing block, the lower side of balancing weight and projection overlaps setting.
In above-mentioned a kind of needle bar crank, the center line of described arc-shaped shock-absorbing block and the vertical center line of crank body overlap and arrange.
In above-mentioned a kind of needle bar crank, the described fan annular outer side edges of snubber block and the lower side of projection overlap; The radius r of fanning annular snubber block is less than the radius R of fan ring body shape projection.
In above-mentioned a kind of needle bar crank, the trailing flank of described crank body is provided with the axle sleeve corresponding with main shaft fixing hole.
The utility model gives prominence to compared to existing technology and useful technique effect is:
1, add arc-shaped shock-absorbing block in the utility model structural design and fan annular snubber block, the center of gravity of needle bar crank adjusts, and when needle bar crank rotates along with main shaft, movement locus is more stable, and the vibration of generation is less.
2, add arc-shaped shock-absorbing block in the utility model structural design and fan annular snubber block, the overall weight of needle bar crank obtains increase, thus when main shaft rotates, further reduces vibration, reduces the noise of Sewing machines.
3, the utility model is owing to reducing the vibration of Sewing machines work hour hands pole crank, therefore during Sewing machines work, overall vibrations are little, and the noise of generation is less, and it is more tranquil that user experiences sensation, be convenient to user concentrate on sewing, improve the quality and efficiency of producing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the left view of structure in Fig. 1.
Fig. 4 is the right view of structure in Fig. 1.
Detailed description of the invention
The utility model is further described with specific embodiment below in conjunction with accompanying drawing, see Fig. 1-4:
Conveniently crank body 2 and projection 4 are distinguished, in Fig. 1 and Fig. 4, be decorated with the dotted line of arc, structure more than dotted line is crank body 2 and shank engaging lug 3, and the structure below dotted line is projection 4.
A kind of needle bar crank, comprise the crank body 2 being provided with main shaft fixing hole 1, the upside of crank body is provided with shank engaging lug 3, the downside of crank body is provided with the projection 4 in fan ring body shape, it is characterized in that: the leading flank of described projection is provided with arc-shaped shock-absorbing block 5 protruding forward, the trailing flank of projection is provided with fan annular snubber block 6 protruding backward.
Said structure has made improvement in prior art, and difference with the prior art point is:
One is the increase of arc-shaped shock-absorbing block 5; Two is the increases of fanning annular snubber block 6;
Wherein: the downside of projection leading flank is raised with forward the balancing weight 9 in crescent shape, arc-shaped shock-absorbing block 5 in crescent shape is located at the leading flank of balancing weight, the lower side of the lower side of arc-shaped shock-absorbing block, the lower side of balancing weight and projection overlaps setting, and the center line of described arc-shaped shock-absorbing block and the vertical center line of crank body overlap and arrange;
The described fan annular outer side edges of snubber block and the lower side of projection overlap; The radius r of fanning annular snubber block is less than the radius R of fan ring body shape projection; (see Fig. 4)
Angle between the center line 7 of the described projection in fan ring body shape and the vertical center line 8 of crank body is at 5 ~ 25 degree.
In the operation of reality, the best angle of the angle between the center line 7 of above-mentioned projection and the vertical center line 8 of crank body is 15 degree.
The center line of described arc-shaped shock-absorbing block and the vertical center line of crank body overlap and arrange.
The described fan annular outer side edges of snubber block and the lower side of projection overlap; The radius r of fanning annular snubber block is less than the radius R of fan ring body shape projection.
The trailing flank of described crank body is provided with the axle sleeve 10 corresponding with main shaft fixing hole.
Fan ring involved in the utility model refers to that an annulus is by the fan-shaped structure intercepting generation.
Needle bar crank operationally, follow main shaft to rotate, if the center of gravity of needle bar crank is not positioned at the midline position of needle bar crank, left-leaning or the Right deviation of such as center of gravity or lean forward or hypsokinesis, then can cause needle bar crank when rotated, produce the flutter phenomenon of bias motion track, when this phenomenon can cause Sewing machines to work, vibrations increase, user understands direct feeling to this vibrations, and the increase simultaneously shaken causes the increase of noise, and therefore the quality of Sewing machines declines; The utility model is then by adjusted for the center of gravity of needle bar crank, and adds the overall weight of needle bar crank, and one is the reduction of departing from of needle bar crank movement locus, avoids flutter phenomenon; Two is that the increase of weight makes the vibration of main shaft and shank connecting rod also reduce thereupon; Reach the visual effect of good shock-absorbing noise-reducing thus.
Above-described embodiment is only preferred embodiment of the present utility model, not limits protection domain of the present utility model according to this, therefore: all equivalence changes done according to structure of the present utility model, shape, principle, all should be covered by within protection domain of the present utility model.
Claims (6)
1. a needle bar crank, comprise the crank body (2) being provided with main shaft fixing hole (1), the upside of crank body is provided with shank engaging lug (3), the downside of crank body is provided with the projection (4) in fan ring body shape, it is characterized in that: the leading flank of described projection is provided with arc-shaped shock-absorbing block (5) protruding forward, the trailing flank of projection is provided with fan annular snubber block (6) protruding backward.
2. a kind of needle bar crank according to claim 1, is characterized in that: the angle between the center line (7) of the described projection in fan ring body shape and the vertical center line of crank body (8) is at 5 ~ 25 degree.
3. a kind of needle bar crank according to claim 1, it is characterized in that: the concrete structure that the leading flank of described projection is provided with arc-shaped shock-absorbing block protruding is forward: the downside of projection leading flank is raised with forward the balancing weight (9) in crescent shape, arc-shaped shock-absorbing block (5) in crescent shape is located at the leading flank of balancing weight, and the lower side of the lower side of arc-shaped shock-absorbing block, the lower side of balancing weight and projection overlaps setting.
4. a kind of needle bar crank according to claim 1, is characterized in that: the center line of described arc-shaped shock-absorbing block and the vertical center line of crank body overlap and arrange.
5. a kind of needle bar crank according to claim 1, is characterized in that: the described fan annular outer side edges of snubber block and the lower side of projection overlap; The radius r of fanning annular snubber block is less than the radius R of fan ring body shape projection.
6. a kind of needle bar crank according to claim 1, is characterized in that: the trailing flank of described crank body is provided with the axle sleeve (10) corresponding with main shaft fixing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520032612.9U CN204455536U (en) | 2015-01-17 | 2015-01-17 | A kind of needle bar crank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520032612.9U CN204455536U (en) | 2015-01-17 | 2015-01-17 | A kind of needle bar crank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204455536U true CN204455536U (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520032612.9U Expired - Fee Related CN204455536U (en) | 2015-01-17 | 2015-01-17 | A kind of needle bar crank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204455536U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149404A (en) * | 2018-03-05 | 2018-06-12 | 苏州强逸机械有限公司 | A kind of use in sewing machine needle bar crank |
| CN108166175A (en) * | 2018-03-19 | 2018-06-15 | 苏州强逸机械有限公司 | A kind of use in sewing machine handle needle bar crank |
| CN108166174A (en) * | 2018-03-19 | 2018-06-15 | 苏州强逸机械有限公司 | A kind of needle bar crank for sewing machine |
| CN108179554A (en) * | 2018-03-19 | 2018-06-19 | 苏州强逸机械有限公司 | A kind of cloth feeding crank with shock-absorbing function |
| CN108193393A (en) * | 2018-03-19 | 2018-06-22 | 苏州强逸机械有限公司 | A kind of crank connecting link of adjustable length |
| CN108251986A (en) * | 2018-03-19 | 2018-07-06 | 苏州强逸机械有限公司 | A kind of needle pole crank |
-
2015
- 2015-01-17 CN CN201520032612.9U patent/CN204455536U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149404A (en) * | 2018-03-05 | 2018-06-12 | 苏州强逸机械有限公司 | A kind of use in sewing machine needle bar crank |
| CN108166175A (en) * | 2018-03-19 | 2018-06-15 | 苏州强逸机械有限公司 | A kind of use in sewing machine handle needle bar crank |
| CN108166174A (en) * | 2018-03-19 | 2018-06-15 | 苏州强逸机械有限公司 | A kind of needle bar crank for sewing machine |
| CN108179554A (en) * | 2018-03-19 | 2018-06-19 | 苏州强逸机械有限公司 | A kind of cloth feeding crank with shock-absorbing function |
| CN108193393A (en) * | 2018-03-19 | 2018-06-22 | 苏州强逸机械有限公司 | A kind of crank connecting link of adjustable length |
| CN108251986A (en) * | 2018-03-19 | 2018-07-06 | 苏州强逸机械有限公司 | A kind of needle pole crank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180911 Address after: 318010 No. 35, Bao Pu Dong Road, Xia Chen street, Jiaojiang District, Taizhou, Zhejiang. Patentee after: Chen Huagen Address before: 318000 No. 25 South Airport Road, Xia Chen street, Jiaojiang District, Taizhou, Zhejiang Patentee before: AUTORI (TAIZHOU) SEWING TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20210117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |