CN1958916A - Lower shaft bearing structure of sewing machine - Google Patents
Lower shaft bearing structure of sewing machine Download PDFInfo
- Publication number
- CN1958916A CN1958916A CNA2006101598925A CN200610159892A CN1958916A CN 1958916 A CN1958916 A CN 1958916A CN A2006101598925 A CNA2006101598925 A CN A2006101598925A CN 200610159892 A CN200610159892 A CN 200610159892A CN 1958916 A CN1958916 A CN 1958916A
- Authority
- CN
- China
- Prior art keywords
- lower shaft
- gear
- sewing machine
- shaft gear
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/30—Details
- D05B69/32—Vibration-minimising devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B71/00—Lubricating or cooling devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B75/00—Frames, stands, tables, or other furniture adapted to carry sewing machines
- D05B75/06—Arrangements, e.g. hinges, for mounting sewing-machine casings to frames, stands, or tables
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2205/00—Interface between the operator and the machine
- D05D2205/32—Safety devices; Security devices
Abstract
A lower shaft bearing mechanism for sewing machine is provided. Wherein, the mechanism comprises: a drive gear which can perform reciprocating rotation driven by a rotational upper shaft; a lower shaft gear which is arranged at the lower shaft relatively parallel to the upper shaft with a predetermined space from the inner side of one end for engaging with the drive gear so as to rotate making the lower shaft rotate. The lower shaft bearing mechanism further comprises: a first bearing part which is free to rotate for supporting the lower shaft at a closer position to outer side of the lower shaft than the lower shaft gear and mounted on the sewing machine bracket capable of freely adjusting the axial position of the lower shaft gear; a second bearing part which is free to rotate for supporting the lower shaft at a closer position to outer side of the upper shaft than the lower shaft gear. The second bearing part is mounted on the sewing machine bracket corresponding to the axial position of the lower shaft gear. Thereby, libration of the gears can be prevented by reducing the load applied to the lower shaft gear so as to restrain noise, abrasion, or damage etc.
Description
Technical field
The present invention relates to be used for the lower shaft bearing structure of the Sewing machines of Sewing machines.
Background technology
In the past, in the Sewing machines of half spinning rotating shuttle, be equipped with the lower shaft driving mechanism that is used for the rotation of last axle is passed to lower shaft.In this lower shaft driving mechanism, by toggle-action lever and the balance staff gear that links with last axle, the rotation (for example, with reference to patent documentation 1) of axle in the lower shaft transmission.At this, lower shaft closes with pendulum shaft gear Nogami, but in order to adjust the backlash between this gear, is set at by following lower shaft bearing structure and freely adjusts the position.
Fig. 2 is a stereogram of representing lower shaft bearing structure in the past.As shown in Figure 2, in lower shaft bearing structure 100,, be provided with the balance staff gear 102 that links and freely swing with not shown toggle-action lever for to lower shaft 101 transferring power.
End in balance staff gear 102 sides of lower shaft 101 is provided with the lower shaft gear 103 that closes with these balance staff gear 102 Nogami.And this lower shaft 101 is by being located at than lower shaft gear 103 lower shaft bearing (metal) 104 more in the inner part, and rotation is bearing on the sewing machine frame (omitting diagram) freely.
Lower shaft bearing 104 is made of minor diameter part 105 cylindraceous and large-diameter portion 106, and minor diameter part 105 inserts in the sewing machine frames and be fixing by limit screw etc.Shaft stool (bearing) 107 down is installed in the inside of large-diameter portion 106, supports lower shaft 101 freely by 107 rotations of this time shaft stool.And the axle center 105a of the periphery of minor diameter part 105 is with respect to the axle center 106a off-centre in the interior week of large-diameter portion 106.
When the backlash between adjustment balance staff gear 102 and the lower shaft gear 103, under the state of inserting logical lower shaft 101, unclamp the limit screw of lower shaft bearing 104, lower shaft bearing 104 is rotated with respect to sewing machine frame.At this moment, because the axle center 105a of minor diameter part 105 and the axle center 106a off-centre of large-diameter portion 106 so the interval L2 of the axle center 102a of balance staff gear 102 and the axle center 103a of lower shaft gear 103 changes, thereby can be adjusted the backlash between two gears 102,103.
[patent documentation 1] spy opens the 2003-236282 communique
At this,, lower shaft gear 103 is applied load F to the direction of leaving mutually when driving balance staff gear 102 with when transmitting its power.This load F periodically change along with the swing of balance staff gear 102.But in the lower shaft bearing structure 100 of Fig. 2, owing to be cantilevered construction, if apply load F, the then leading section of lower shaft gear 103 vibration causes producing unfavorable conditions such as noise, wearing and tearing, breakage.
Summary of the invention
The objective of the invention is to, reduce the load that imposes on lower shaft gear, prevent the vibration of this gear, to suppress noise or wearing and tearing breakage etc.
The lower shaft bearing structure of technical scheme one described Sewing machines is characterized in that having: driven wheel 2, and it back and forth rotates by the axle of going up that rotates; Lower shaft gear 3, it is located on this lower shaft from the interval of vacating regulation in the inboard with respect to a described end of going up the parallel lower shaft of axle, closes and rotates with described Qu Dong Chi Lun Nogami, so that described lower shaft rotates; Clutch shaft bearing portion 5, than described lower shaft gear more in the inner part, rotation is supported described lower shaft freely and is installed on the sewing machine frame, and freely adjusts the position in the axle center of described lower shaft gear on described lower shaft for it; With the second bearing portion 9, it than described lower shaft gear more in the outer part, rotates and supports described lower shaft freely on described lower shaft.
In addition, the lower shaft bearing structure of technical scheme two described Sewing machiness, it is characterized in that, the described second bearing portion is configured to and can moves with respect to sewing machine frame in the mode of the backlash that can adjust described driven wheel and lower shaft gear, and can be installed in corresponding to the shaft core position of the adjusted described lower shaft gear of backlash on the described sewing machine frame.
According to the present invention, because clutch shaft bearing portion and the second bearing portion clip lower shaft gear supporting lower shaft, so, with the part that is provided with of the lower shaft gear of double base structure supporting lower shaft.Thus, the load that puts on lower shaft gear can be disperseed to the clutch shaft bearing portion and the second bearing portion, thereby can reduce the load that imposes on lower shaft or clutch shaft bearing portion.Particularly by forming the double base structure, lower shaft gear is difficult for producing vibration, and the result can suppress noise or wearing and tearing breakage etc. effectively.
And, owing to the second bearing portion is installed on the sewing machine frame corresponding to the position in the axle center of lower shaft gear, so, after the position in the axle center of adjustment lower shaft gear, also can utilize the second bearing portion to support lower shaft reliably.
Description of drawings
Fig. 1 is the stereogram of expression lower shaft bearing structure of the present invention;
Fig. 2 is a stereogram of representing lower shaft bearing structure in the past.
Among the figure: 1-lower shaft bearing structure, 2-balance staff gear (driven wheel), 2a-axle center, 3-lower shaft gear, the 3a-axle center, 4-lower shaft, 4a-axle center, 5-lower shaft bearing (clutch shaft bearing member), the 6-minor diameter part, 6a-axle center, 7-large-diameter portion, the 7a-axle center, first time shaft stool of 8-, 9-second bearing components, the 10-limit screw, 11-fixed head, 12,13, the 14-through hole, second time shaft stool of 15-, 16-threaded portion, 17-head of screw.
The specific embodiment
Below, with reference to Fig. 1 embodiments of the present invention are described.This lower shaft bearing structure 1 is the mechanism of lower shaft etc. that is applicable to the Sewing machines of the lower shaft that cloth feeding mechanism possessed of Sewing machines or half spinning rotating shuttle.As shown in Figure 1, in lower shaft bearing structure 1, be provided with by the balance staff gear (driven wheel) 2 that axle (omitting diagram) back and forth drives of going up that rotates.As this balance staff gear 2, for example, can enumerate and structure that last axle directly links and rotates, or the structure that links and rotate with toggle-action lever with respect to last axle interlock.
In addition, in lower shaft bearing structure 1, merge the lower shaft gear 3 that back and forth rotates with balance staff gear 2 Nogami, for the lower shaft 4 parallel with respect to last axle rotated, insert in the mode of vacating the interval of regulation in inboard (a direction side of the axis direction of lower shaft 4: be the left side the figure) from an end of lower shaft 4 and to lead to and be fixed on this lower shaft 4.The axle center 4a of this lower shaft 4 and the axle center 3a of lower shaft gear 3 are configured on the same line.
On lower shaft 4, than lower shaft gear 3 more in the inner part, be provided with respect to sewing machine frame (omitting diagram) and rotate the lower shaft bearing (clutch shaft bearing portion) 5 that supports lower shaft 4 freely.Lower shaft bearing 5 is made of minor diameter part 6 cylindraceous and large-diameter portion 7, and minor diameter part 6 inserts in the sewing machine frames and be fixing by limit screw etc.Shaft stool 8 is installed first time in the inside of large-diameter portion 7, supports lower shaft 4 freely by these first time shaft stool, 8 rotations.And the axle center 6a of the periphery of minor diameter part 6 is with respect to the axle center 7a off-centre in the interior week of large-diameter portion 7.At this, because the axle center 7a of large-diameter portion 7 is configured on the same line with respect to axle center 3a, the 4a of lower shaft gear 3 and lower shaft 4, so these axle center 3a, 4a are also with respect to the axle center 6a off-centre of minor diameter part 6.Owing to the existence of this off-centre, can adjust the axle center 3a of lower shaft gear 3.
In addition, on lower shaft 4,, be provided with to rotate the second bearing portion 9 that the mode that supports lower shaft 4 freely is made of fixed head 11 and second time shaft stool 15, the second bearing portion 9 is fixed on limit screw 10,10 on the sewing machine frame than lower shaft gear 3 (the other direction side of the axis direction of lower shaft 4: be the right side among the figure) more in the outer part.
Fixed head 11 is formed with through hole 12,13,14 in central authorities and two ends, extends along the direction vertical with respect to the axle center 4a of lower shaft 4, and is fixed on the sewing machine frame by described limit screw 10,10.
In the through hole 12 of central authorities, insert second time shaft stool 15 that lower shaft 4 is supported in rotation freely, and it is installed on the fixed head 11.
The through hole 13,14 at two ends is inserted logical by limit screw 10 when being fixed on fixed head 11 on the sewing machine frame.That the internal diameter of through hole 13,14 is set at is bigger than the external diameter of the threaded portion 16 of limit screw 10, than the little value of the external diameter of head of screw 17.Thus, fixed head 11 is merely able to carry out the position adjustment of threaded portion 16 and the difference of the diameter of through hole 13,14.The maximum amount of movement of the lower shaft 4 the when difference of this diameter is set at than the backlash adjustment of balance staff gear 2 and lower shaft gear 3 is big.That is, because the second bearing portion 9 can carry out the position adjustment of the maximum amount of movement of lower shaft 4 at least, so, can be corresponding to the shift in position second bearing portion 9 of the axle center 4a of this lower shaft 4.
In addition, also can replace this embodiment, on sewing machine frame, form slotted hole, can in the scope of this slotted hole, move and retaining thread portion 16.
Secondly, the effect of present embodiment is described.
When balance staff gear 2 was adjusted with the backlash of lower shaft gear 3, the operator at first unclamped the limit screw 10 of the second bearing portion 9 and removes the fixing of fixed heads 11, and the limit screw that unclamps lower shaft bearing 5 is removed the fixing of lower shaft bearing 5.
Then, the operator is removing fixed head 11 with respect to after sewing machine frame and lower shaft 4 fixing, rotation lower shaft bearing 5.Because the axle center 6a of minor diameter part 6 and the axle center 7a off-centre of large-diameter portion 7, so along with the rotation of lower shaft bearing 5, the interval L1 of the axle center 2a of balance staff gear 2 and the axle center 4a of lower shaft gear 3 changes, thereby can adjust the backlash between two gears 2,4.
When having guaranteed arbitrarily backlash, the operator tightens limit screw with fixing lower shaft bearing 5.Then, the operator is installed in fixed head 11 on sewing machine frame and the lower shaft 4, but this moment, even adjusting axle center 3a, the 4a of lower shaft gear 3 or lower shaft 4 because of backlash produces mobile, because the second bearing portion 9 freely changes corresponding to the position of the axle center 4a of lower shaft 4, so can easily tighten limit screw 10 with fixing.
As mentioned above, according to the lower shaft bearing structure 1 of present embodiment, because lower shaft bearing 5 and the second bearing portion 9 clip lower shaft gear 3 supporting lower shafts 4, so, with the part that is provided with of the lower shaft gear 3 of double base structure supporting lower shaft 4.Thus, the load that puts on lower shaft gear 3 can be disperseed to the lower shaft bearing 5 and the second bearing portion 9, thereby can reduce the load that imposes on lower shaft 4 or lower shaft bearing 5.Particularly by forming the double base structure, lower shaft gear 3 is difficult for producing vibration, and the result can suppress noise or wearing and tearing breakage etc. effectively.
And, owing to the second bearing portion 9 is installed on the sewing machine frame corresponding to the position of the axle center 3a of lower shaft gear 3, so, after the position of the axle center 3a of adjustment lower shaft gear 3, also can utilize the second bearing portion 9 to support lower shaft 4 reliably.
In addition, the present invention is not limit by above-mentioned embodiment certainly, can suitably change.
Claims (2)
1. the lower shaft bearing structure of a Sewing machines is characterized in that, has:
Driven wheel, it back and forth rotates by the axle of going up that rotates;
Lower shaft gear, it is located on this lower shaft from the interval of vacating regulation in the inboard with respect to a described end of going up the parallel lower shaft of axle, closes and rotates with described Qu Dong Chi Lun Nogami, so that described lower shaft rotates;
Clutch shaft bearing portion, than described lower shaft gear more in the inner part, rotation is supported described lower shaft freely and is installed on the sewing machine frame, and freely adjusts the position in the axle center of described lower shaft gear on described lower shaft for it; With
The second bearing portion, it than described lower shaft gear more in the outer part, rotates and supports described lower shaft freely on described lower shaft.
2. the lower shaft bearing structure of Sewing machines according to claim 1 is characterized in that,
The described second bearing portion is configured to and can moves with respect to sewing machine frame in the mode of the backlash that can adjust described driven wheel and lower shaft gear, and can be installed in corresponding to the shaft core position of the adjusted described lower shaft gear of backlash on the described sewing machine frame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005320660A JP4920951B2 (en) | 2005-11-04 | 2005-11-04 | Bottom bearing mechanism of sewing machine |
| JP2005320660 | 2005-11-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1958916A true CN1958916A (en) | 2007-05-09 |
Family
ID=38070758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101598925A Pending CN1958916A (en) | 2005-11-04 | 2006-11-02 | Lower shaft bearing structure of sewing machine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4920951B2 (en) |
| KR (1) | KR101266357B1 (en) |
| CN (1) | CN1958916A (en) |
| TW (1) | TW200728547A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776731A (en) * | 2012-03-28 | 2012-11-14 | 东阳市双燕设备有限公司 | Oscillating shuttle embroidery machine |
| CN101519836B (en) * | 2009-03-16 | 2013-03-13 | 中捷缝纫机股份有限公司 | Backlash adjusting mechanism of lower shaft gear and drive gear in a sewing machine |
| CN103741396A (en) * | 2013-12-27 | 2014-04-23 | 吴江市震宇缝制设备有限公司 | Shaft seat of sewing machine |
| CN106536805A (en) * | 2014-07-29 | 2017-03-22 | 金光沿 | Lower shaft support device for sewing machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011005164A (en) * | 2009-06-29 | 2011-01-13 | Brother Industries Ltd | Sewing machine and jig |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60172051A (en) * | 1984-02-17 | 1985-09-05 | Fuji Xerox Co Ltd | Copying machine |
| JP2000240764A (en) * | 1999-02-23 | 2000-09-05 | Toyota Motor Corp | Worm gear mechanism |
| JP4343395B2 (en) * | 2000-05-16 | 2009-10-14 | Ｊｕｋｉ株式会社 | Sewing machine drive |
| JP2003236282A (en) * | 2002-02-21 | 2003-08-26 | Juki Corp | Lower shaft driving mechanism of sewing machine |
-
2005
- 2005-11-04 JP JP2005320660A patent/JP4920951B2/en active Active
-
2006
- 2006-10-12 TW TW095137495A patent/TW200728547A/en unknown
- 2006-11-02 KR KR1020060107683A patent/KR101266357B1/en active IP Right Grant
- 2006-11-02 CN CNA2006101598925A patent/CN1958916A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519836B (en) * | 2009-03-16 | 2013-03-13 | 中捷缝纫机股份有限公司 | Backlash adjusting mechanism of lower shaft gear and drive gear in a sewing machine |
| CN102776731A (en) * | 2012-03-28 | 2012-11-14 | 东阳市双燕设备有限公司 | Oscillating shuttle embroidery machine |
| CN103741396A (en) * | 2013-12-27 | 2014-04-23 | 吴江市震宇缝制设备有限公司 | Shaft seat of sewing machine |
| CN106536805A (en) * | 2014-07-29 | 2017-03-22 | 金光沿 | Lower shaft support device for sewing machine |
| CN106536805B (en) * | 2014-07-29 | 2019-12-10 | 金光沿 | Lower shaft supporting device of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101266357B1 (en) | 2013-05-22 |
| JP4920951B2 (en) | 2012-04-18 |
| TW200728547A (en) | 2007-08-01 |
| JP2007125216A (en) | 2007-05-24 |
| KR20070048609A (en) | 2007-05-09 |
| TWI379927B (en) | 2012-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20070509 |