CN203420092U - Automatic foot lifting and pressing mechanism of sewing machine - Google Patents
Automatic foot lifting and pressing mechanism of sewing machine Download PDFInfo
- Publication number
- CN203420092U CN203420092U CN201320519988.3U CN201320519988U CN203420092U CN 203420092 U CN203420092 U CN 203420092U CN 201320519988 U CN201320519988 U CN 201320519988U CN 203420092 U CN203420092 U CN 203420092U
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- Prior art keywords
- swing arm
- foot
- automatic needle
- linear actuator
- casing
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Abstract
The utility model discloses an automatic foot lifting and pressing mechanism of a sewing machine. The automatic foot lifting and pressing mechanism of the sewing machine comprises a machine shell and a linear driver, wherein the machine shell is provided with a machine shell inner cavity, and the linear driver comprises a draw bar capable of making straight reciprocating motion and is fixedly installed on the outer wall of the machine shell; a rotary shaft is installed on the machine shell in a rotary mode, the inner end of the rotary shaft is located in the machine shell inner cavity, and the outer end of the rotary shaft stretches out of the machine shell; one end of an outer swing arm is fixedly connected with the outer end of the rotary shaft, and the other end of the outer swing arm is connected with the draw bar; one end of an inner swing arm is fixedly connected with the inner end of the rotary shaft; a front lever comprises three pin holes, the first pin hole is connected to the interior of the machine shell in a rotary mode through a pin shaft, the second pin hole is hinged to a foot pressing lifting board, the rear end of a pull rod is hinged to the other end of the inner swing arm, and the front end of the pull rod is hinged to the third pin hole of the front lever. According to the automatic foot lifting and pressing mechanism of the sewing machine, due to the fact that the linear driver is fixed on the outer wall of the machine shell, mechanism arrangement can be more flexible, limitation of space on the mechanism is small, and checking and maintenance can be achieved more conveniently.
Description
Technical field
The utility model relates to industrial sewing machine, is specifically related to a kind of automatic needle-foot-lifting mechanism for Sewing machines.
Background technology
At present, in a lot of industrial sewing machines, all adopted automatic needle-foot-lifting mechanism, to alleviate operating personnel's labour intensity, raised labour efficiency, automatic needle-foot-lifting mechanism has been driven the action of presser foot lifter by electromagnet.
Such as Chinese utility model patent CN200820001827.4 discloses a kind of automatic pressure foot lifting mechanism of computer direct-driven double needle lockstitch machine, comprise electromagnet, crank, lift last item and driving member, described electromagnet is arranged on the rear window panel of double needle lockstitch machine head by electromagnet bearing, driving member is installed in rotation on the opposite side of rear window panel, the clutch end of electromagnet is connected with crank, lift last item one end and match with driving member, the other end is connected with crank through rear window panel.
And for example Chinese utility model patent CN201020526136.3 discloses a kind of automatic presser foot raising mechanism of industrial flat bed sewing machine, comprises aluminum alloy bottom plate, presser foot lifter electromagnet, elongated slot connecting rod, shifter lever, presser feet ejector pin, knee control lifting arm, knee control lever, knee control shadoof, lifts and press connecting rod and presser foot component; Presser foot lifter electromagnet is arranged on the below of aluminum alloy bottom plate, and be connected with one end of elongated slot connecting rod, the elongated slot end of elongated slot connecting rod is connected with the lower end of shifter lever, the upper end of shifter lever connects presser feet ejector pin, during work, presser foot lifter electromagnet drives elongated slot connecting rod, promote conversion lever, thereby promote presser feet ejector pin, move upward, then drive presser feet to lift through linkage.
Chinese utility model patent CN201120345007.9 discloses a kind of device for foot lift up of integrated industrial sewing machine, and workbench top in casing back is provided with four screw boss, and two mount pads in electromagnet assembly left and right lock on boss.When electromagnet assembly is switched on, exerting oneself to hold drives thrust collar to release lever, and the lever other end pulls unidirectional hook to drive and lifts pressure connecting rod, lifts and presses connecting rod to lift compression lever bracket frame, compresses lever bracket frame and drives pressure foot lifting.
In above-mentioned prior art, foot lifting mechanism more complicated, has increased the cost of processing, assembling; In addition, the functional reliability of these mechanisms is poor, and fault rate is high, also has the defect of inconvenient maintenance after breaking down.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of automatic needle-foot-lifting mechanism of Sewing machines simple in structure, easy to maintenance, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of automatic needle-foot-lifting mechanism of Sewing machines, comprises with lower member: casing, comprises a chassis cavity; Linear actuator, is fixedly mounted on the outer wall of described casing, described linear actuator comprise one can straight reciprocating motion draw bar; Rotating shaft, is installed in rotation on casing, and the inner of rotating shaft is arranged in chassis cavity, and the outer end of rotating shaft reaches beyond casing; Outer swing arm, one end is fixedly connected with the outer end of rotating shaft, and the other end is connected with described draw bar; Interior swing arm, one end of interior swing arm is fixedly connected with the inner of rotating shaft; Front lever, front lever comprises three pin-and-holes, the first pin-and-hole is rotatably connected in casing by bearing pin; The second pin-and-hole and presser feet lifter plate are hinged; Pull bar, the rear end of pull bar and the other end of interior swing arm are hinged, and the 3rd pin-and-hole of the front end of pull bar and front lever is hinged.
Preferably, the other end of described outer swing arm and the end of draw bar are hinged.
Further, described linear actuator is plunger electromagnet.
Preferably, the other end of described outer swing arm is resisted against on the end face of draw bar.
Preferably, described linear actuator is push type electromagnet.
Preferably, described linear actuator is cylinder.
Preferably, described interior swing arm, outer swing arm are all perpendicular with described rotating shaft.
Preferably, described presser feet lifter plate is connected with the upper end of a depression bar, and the lower end of depression bar is connected with presser feet.
Preferably, described casing comprises that one for the rear window panel of sealing machine shell inner chamber, and described linear actuator is arranged on rear window panel.
Preferably, the length of described outer swing arm is greater than the length of interior swing arm.
Compared with prior art, the technical scheme that the utility model adopts has the following advantages:
1, the utility model adopts simple linkage just can realize automatic needle-foot-lifting function, and structure is simplified greatly, and the volume that can greatly improve efficiency of assembling ，Shi mechanism reduces greatly;
2, in the utility model, swing arm is all fixedly connected with rotating shaft with outer swing arm, outer swing arm is connected with linear actuator, and interior swing arm and pull bar are hinged, thereby can will make the linear actuator outside casing can drive the linkage in casing, complete presser foot lifter action.
3, it is more flexible that the utility model is fixed on linear actuator the layout of outer wall Shang，Shi mechanism of casing, and mechanism is subject to the restriction in space less, and maintenance and inspection are also convenient.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view (shank, presser feet etc. are not shown) that adopts the Sewing machines of the utility model automatic needle-foot-lifting mechanism.
Fig. 2 is the schematic diagram of the automatic needle-foot-lifting mechanism of a kind of Sewing machines of the utility model.
Fig. 3 is the schematic diagram of the horizontal automatic needle-foot-lifting mechanism of a kind of linear actuator of the utility model.
Fig. 4 is the annexation schematic diagram of interior swing arm, outer swing arm and rotating shaft in the utility model.
Fig. 5 is the schematic diagram of housing part in the utility model.
Fig. 6 is the schematic perspective view of the Sewing machines of the utility model the second embodiment.
Fig. 7 is the structural scheme of mechanism of the utility model the second embodiment.
In figure: 1, linear actuator 3, pull bar 4, front lever 5, presser feet lifter plate
6, depression bar 7, presser feet 8, rear window panel 11, draw bar
21, rotating shaft 22, outer swing arm 23, interior swing arm 41, the first pin-and-hole
42, the second pin-and-hole 43, the 3rd pin-and-hole 100, casing 110, chassis cavity
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, those skilled in the art can more clearly understand other advantages of the present utility model and effect thus.
It should be noted that the structure that Figure of description illustrates, ratio, size etc. only in order to coordinate the specific embodiment, more clearly understand design of the present utility model for those skilled in the art, not in order to limit protection domain of the present utility model.The adjustment of the modification of any structure, the change of proportionate relationship or size, in the situation that not affecting effect of the present utility model and object and reaching, within all should still dropping on protection domain of the present utility model.For convenience of description, the relative position relation of each parts is to be described according to the Butut mode of Figure of description.
As shown in Figure 1 and Figure 2, the automatic needle-foot-lifting mechanism of a kind of Sewing machines of the utility model comprises the casing 100 of Sewing machines, has a chassis cavity 110(and see Fig. 5 in this casing 100).A linear actuator 1 is fixedly mounted on the outer wall of casing 100, described linear actuator 1 comprise one can straight reciprocating motion draw bar 11.In this preferred embodiment, chassis cavity 110 is by 8 sealings of a rear window panel, thereby rear window panel 8 forms a part for casing 100, and linear actuator 1 is fixedly mounted on the outside of rear window panel 8.
A rotating shaft 21 is installed in rotation on casing 100, rotating shaft 21 is through the sidewall of casing 100, its the inner is arranged in chassis cavity 110, and the outside that the outer end of rotating shaft 21 reaches casing 100 is fixedly connected with an outer swing arm 22, and the other end of outer swing arm 22 is resisted against on the end face of draw bar 11.
In chassis cavity 110, there is an interior swing arm 23, one end of interior swing arm 23 is fixedly connected with the inner of rotating shaft 21, the rear end of the other end of interior swing arm 23 and a pull bar 3 is hinged, the front end of pull bar 3 is connected with a front lever 4, front lever 4 is provided with three pin-and-holes, wherein the first pin-and-hole 41 is rotatably connected in casing 100 by bearing pin, becomes the rotating fulcrum of front lever 4; The second pin-and-hole 42 is hinged with the presser feet lifter plate 5 in head, and presser feet lifter plate 5 is further connected with the upper end of a depression bar 6 again, and the lower end of depression bar 6 is connected with presser feet 7, thereby presser feet lifter plate 5 can drive presser feet 7 to move up and down, and completes presser foot lifter action; The 3rd 43 of pin-and-holes are hinged with the front end of described pull bar 3.
In the above-described embodiments, linear actuator 1 can be that (energising rear haulage bar 11 can outwards extend push type electromagnet, and power-off rear haulage bar can inwardly be retracted under the effect of gravity or back-moving spring), can be also a cylinder, the piston rod of cylinder forms above-mentioned draw bar 11.
As shown in Figure 4, rotating shaft 21 and outer swing arm 22, interior swing arm 23 all in vertical state, and are connected to one.
In the utility model preferred embodiment, in one section of rotating shaft 21 between outer swing arm 22 and interior swing arm 23, cover has axle sleeve 24, and axle sleeve 24 matches with the through hole on casing 100 sidewalls.The length of outer swing arm 22 is more preferably greater than the length of interior swing arm 23, thereby makes the acting force arm in draw bar 11 swing arm outside 22 be greater than the acting force arm of pull bar 3 in interior swing arm 23, can reach labour-saving effect, thereby reduce the volume of linear actuator 1.
When needs presser foot lifter, linear actuator 1 action (energising of push type electromagnet or cylinder intake), draw bar 11 is upwards released, promote outer swing arm 22, rotating shaft 21 clockwise rotates together with interior swing arm 23, the one end being hinged due to interior swing arm 23 and pull bar 3 is positioned at the below of rotating shaft 21, thereby 3, pull bar pulls front lever 4 to produce and rotates counterclockwise, and drive presser feet lifter plate 5, presser feet 7 upwards liftings, complete presser foot lifter action.After power-off, draw bar 11 is retracted downwards, and lead agency produces counteragent, and presser feet 7 is resetted.
In the present embodiment, between the end face of draw bar 11 and outer swing arm 22, be only contact relation, be just abutted together in other words, do not adopt other connector to connect, as long as can promoting outer swing arm 22, draw bar 11 rotates.
Certainly, linear actuator 1 is not limited to erectility as shown in Figure 1 and Figure 2, it also can be as shown in Figure 3 horizontal installation (draw bar 11 is roughly the level of state), change the angle of outer swing arm 22 and interior swing arm 23, linear actuator 1 also can adopt other direction to be arranged on casing 100, as long as draw bar 11 can promote outer swing arm 22, rotate, and drive presser feet to lift.
As shown in Figure 6, Figure 7, in the second embodiment of the present utility model, outer swing arm 22 is hinged by a jointed shaft 12 with the end of draw bar 11, and the end of outer swing arm 22 has a slotted hole and matches with jointed shaft 12, to allow that outer swing arm 22 rotates within the scope of certain angle.In this embodiment, one end that interior swing arm 23 and pull bar 3 are hinged is positioned at the top of rotating shaft 21, therefore linear actuator 1 adopts plunger electromagnet, on the draw bar 11 of plunger electromagnet, be connected with back-moving spring, energising rear haulage bar 11 can inwardly shrink, and power-off rear haulage bar 11 can outwards extend under the effect of back-moving spring.All the other members and annexation thereof are with the first embodiment.
When needs presser foot lifter, plunger electromagnet 1 energising, draw bar 11 shrinks downwards, pull outer swing arm 22, rotating shaft 21 to rotate counterclockwise together with interior swing arm 23, and pull bar 3 also pulls front lever 4 generations to rotate counterclockwise, thereby drive presser feet lifter plate 5, presser feet 7 upwards liftings, complete presser foot lifter action.After power-off, draw bar 11 upwards resets under the effect of back-moving spring, and lead agency produces counteragent, and presser feet 7 is resetted.Obviously, in the present embodiment, also can adopt cylinder to replace plunger electromagnet as linear actuator 1, the piston rod of cylinder is as above-mentioned draw bar 11.Cylinder both can adopt two-action cylinder, also can adopt the single effect cylinder with back-moving spring.
Certainly, the utility model is not got rid of the linear actuator of other type, such as the recessed post rod mechanism etc. of taking turns by driven by motor, can export straight reciprocating motion yet.
Claims (10)
1. an automatic needle-foot-lifting mechanism for Sewing machines, is characterized in that, comprises with lower member:
Casing (100), comprises a chassis cavity (110);
Linear actuator (1), is fixedly mounted on the outer wall of described casing (100), described linear actuator (1) comprise one can straight reciprocating motion draw bar (11);
Rotating shaft (21), is installed in rotation on casing (100) upper, and the inner of rotating shaft (21) is arranged in chassis cavity (110), and the outer end of rotating shaft (21) reaches casing (100) in addition;
Outer swing arm (22), one end is fixedly connected with the outer end of rotating shaft (21), and the other end is connected with described draw bar (11);
Interior swing arm (23), one end of interior swing arm (23) is fixedly connected with the inner of rotating shaft (21);
Front lever (4), front lever comprises three pin-and-holes, the first pin-and-hole (41) is rotatably connected in casing (100) by bearing pin; The second pin-and-hole (42) is hinged with presser feet lifter plate (5);
Pull bar (3), the other end of the rear end of pull bar (3) and interior swing arm (23) is hinged, and the 3rd pin-and-hole (43) of the front end of pull bar (3) and front lever is hinged.
2. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, the end of the other end of described outer swing arm (22) and draw bar (11) is hinged.
3. automatic needle-foot-lifting according to claim 2 mechanism, is characterized in that, described linear actuator (1) is plunger electromagnet.
4. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, the other end of described outer swing arm (22) is resisted against on the end face of draw bar (11).
5. automatic needle-foot-lifting according to claim 4 mechanism, is characterized in that, described linear actuator (1) is push type electromagnet.
6. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, described linear actuator (1) is cylinder.
7. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, described interior swing arm (23), outer swing arm (22) are all perpendicular with described rotating shaft (21).
8. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, described presser feet lifter plate (5) is connected with the upper end of a depression bar (6), and the lower end of depression bar (6) is connected with presser feet (7).
9. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, described casing (100) comprises a rear window panel for sealing machine shell inner chamber (110) (8), and described linear actuator (1) is arranged on rear window panel (8).
10. automatic needle-foot-lifting according to claim 1 mechanism, is characterized in that, the length of described outer swing arm (22) is greater than the length of interior swing arm (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320519988.3U CN203420092U (en) | 2013-08-23 | 2013-08-23 | Automatic foot lifting and pressing mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320519988.3U CN203420092U (en) | 2013-08-23 | 2013-08-23 | Automatic foot lifting and pressing mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203420092U true CN203420092U (en) | 2014-02-05 |
Family
ID=50019192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320519988.3U Expired - Lifetime CN203420092U (en) | 2013-08-23 | 2013-08-23 | Automatic foot lifting and pressing mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203420092U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437079A (en) * | 2013-08-23 | 2013-12-11 | 新杰克缝纫机股份有限公司 | Automatic lifting mechanism for presser foot of sewing machine |
| CN108726314A (en) * | 2018-08-20 | 2018-11-02 | 西继迅达（许昌）电梯有限公司 | Shift mechanism is electronically activated in safety tongs |
| WO2020181904A1 (en) * | 2019-03-11 | 2020-09-17 | 浙江翔科缝纫机股份有限公司 | Automatic pressing foot lifting thread-loosening mechanism and sewing machine |
-
2013
- 2013-08-23 CN CN201320519988.3U patent/CN203420092U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437079A (en) * | 2013-08-23 | 2013-12-11 | 新杰克缝纫机股份有限公司 | Automatic lifting mechanism for presser foot of sewing machine |
| CN108726314A (en) * | 2018-08-20 | 2018-11-02 | 西继迅达（许昌）电梯有限公司 | Shift mechanism is electronically activated in safety tongs |
| WO2020181904A1 (en) * | 2019-03-11 | 2020-09-17 | 浙江翔科缝纫机股份有限公司 | Automatic pressing foot lifting thread-loosening mechanism and sewing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JACK SEWING CO., LTD. Free format text: FORMER NAME: NEW JACK SEWING MACHINE CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 318010 Taizhou Airport Road, Jiaojiang District, Zhejiang, No. 15 Patentee after: JACK SEWING MACHINE Co.,Ltd. Address before: 318010 Taizhou Airport Road, Jiaojiang District, Zhejiang, No. 15 Patentee before: NEW JACK SEWING MACHINE Co.,Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140205 |
|
| CX01 | Expiry of patent term |