CN202139414U

CN202139414U - Structural improvement of sewing machine

Info

Publication number: CN202139414U
Application number: CN201120123948U
Authority: CN
Inventors: 蔡荣全; 陈文忠
Original assignee: JIANLIAN SEWING MACHINE CO Ltd
Current assignee: JIANLIAN SEWING MACHINE CO Ltd
Priority date: 2011-04-22
Filing date: 2011-04-22
Publication date: 2012-02-08
Anticipated expiration: 2021-04-22

Abstract

The utility model discloses a structural improvement of a sewing machine, which comprises a worm gear, a cam group, a swinging arm group, a positioning group and a poking rod group, wherein the worm gear is provided with a shaft; the cam group is provided with a plurality of concentric cams, a connecting part is arranged between every two cams, the cam group is provided with a first shaft hole penetrating through the cam group, and a switching groove, and the shaft hole penetrates through the shaft of the worm gear; the swinging arm group comprises a first swinging arm and a rear swinging arm, and the rear swinging arm is provided with an upper guide wheel, is pivoted with the front swinging arm, and is provided with a pivoted hole; the positioning group is provided with a lower guide wheel and a second shaft hole which penetrates through the shaft of the worm gear; and the poking rod group is provided with a poking block and a poking rod, and the tail end of the poking rod is embedded into the switching groove of the cam group.

Description

The improvement of Sewing machines mechanism

Technical field

The utility model is improved relevant for Sewing machines mechanism.

Background technology

Commonly use Sewing machines mechanism; System is applied to the vertical FREQUENCY CONTROL of suture needle of general Sewing machines; To produce the thread of different density degree needle gage,, switch with manual operation mostly in response to different sewing demands; Or the switching of limited to move certainly (being generally two sections), the suture kind in actual sewing process changes limited.

The shortcoming of commonly using the maximum of Sewing machines mechanism is:

1. traditional Sewing machines mechanism must change cam frequently, both inconvenience and consuming time.

2. the indent solid cam is adopted by the Sewing machines mechanism of manual switchover cam, and complex structure and processing cost are high, and maintaining is more difficult.

3. the Sewing machines mechanism of manual switchover cam is merely two section type, the suture demand of variation in the time of can't satisfying operation in design.

Aforementioned mentioned about commonly using Sewing machines mechanism; Although can reach at the suture that should be possessed aspect the general sewing process and change basic demand; But on practicality and high efficiency convenience when practical application and suture technological layer and the application in industry specificity; All exist under the situation of many shortcomings and deficiency, can't bring into play industrial applicability more specifically.

In sum, owing to commonly use Sewing machines mechanism, exist above-mentioned disappearance with not enough; Under the future trend prerequisite based on industrial progress; Really be necessary to propose concrete improvement scheme,, further provide industry more technical selection to meet the required of industrial progress.

The utility model content

The shortcoming of deficiency aspect practicality and high efficiency convenience and the suture technological layer and the application in industry specificity of Sewing machines mechanism when the practical application is commonly used by this creation system with solution; And the problem that is restricted at aspects such as practicability technology; Be primary and foremost purpose reaching lifting with strengthening quick and laborsaving cam switching construction on the one hand; Satisfying specializing design and being lifted at facilitating functions property, variation applicability and the range of application of forming aspect the assembly of diversified suture on the other hand; Outside the basic function of the suture variation aspect that sewing process aspect should be possessed as one of should possessing to reach, and make its practical development that has industrial applicability concurrently and requirement.

No matter so see it by subjective and objective condition; The Sewing machines mechanism improvement of this creation; There are not the height practical operation mobility of instead and the advantage of diversified suture integration technology because of possessing market; Be fit to be applied to the cam changeover mechanism Equipment Market of high-effect Sewing machines, certainly will be able to bring the greatest business opportunity of device fabrication of high-effect Sewing machines cam changeover mechanism and manufacturing industry relevant market.

In order to reach above-mentioned purpose and function, the improvement of a kind of Sewing machines mechanism comprises: a worm gear, a cam set, a swing arm set, certain hyte and a driving lever group, and its concrete technological means and scheme of carrying out comprises:

One worm gear is to be provided with a wheel shaft.

One cam set is to be provided with plural number and concentric cam, respectively is provided with a linking part between each cam, and in addition, this cam set is provided with first axis hole and that runs through and switches groove, and this first axis hole wears the wheel shaft of worm gear.

One swing arm set is to comprise a front swing arm and a rear-swing arm, and this rear-swing arm is provided with a upper block and articulates this front swing arm, and in addition, this rear-swing arm is provided with a pivot hole.

Certain hyte is to be provided with a lower tumbler and one second axis hole, and this second axis hole wears the wheel shaft of worm gear.

One driving lever group is to be provided with a shifting block and a driving lever, and the end system of this driving lever embeds the switching groove of cam set.

By promoting this shifting block the driving lever of the switching groove that embeds cam set is moved axially, change upper block and the cam that lower tumbler contacted, and then drive the action output that swing arm set is made different hunting frequencies.

The plural cam-train of above-mentioned this cam set comprises first cam and second cam.

Above-mentioned this upper block system can swing up and down and independent rotation with rear-swing arm.

End system is provided with a suture needle before above-mentioned this front swing arm.

Above-mentioned this lower tumbler system is fixed in the location group and only makes independent rotation.

The concrete characteristics and the effect of this creation are:

1. drive driving lever with shifting block and do the switching between cam, be swift in motion really.

2. change the needle gage of suture needle with the switching between cam, control suture density.

3. the design of the linking part between cam can make the switching between cam more smooth and easy.

4. utilize shape working curve outside the cam, can design various suture.

5. shifting block setting is to expose to outside the sewing machine body, and is simple to operation.

6. cam is designed to multisection type according to actual demand, and sewing changes variation

Description of drawings

Fig. 1: this creates the whole mechanism exploded perspective sketch map of an embodiment.

Fig. 2: this creates the whole mechanism combination schematic perspective view of an embodiment.

Fig. 3: this driving lever of creating an embodiment is provided with the position schematic perspective view.

Fig. 4: this first cam action shaft of creating an embodiment is to cutaway view.

Fig. 5 A: this creates the first cam start radial cross-section of an embodiment.

Fig. 5 B: with the corresponding first needle gage suture of structure among Fig. 5 A.

Fig. 6: this second cam action shaft of creating an embodiment is to cutaway view.

Fig. 7 A: this creates the second cam start radial cross-section of an embodiment.

Fig. 7 B: with the corresponding second needle gage suture of structure among Fig. 7 A.

(1) worm gear

(11) wheel shaft

(2) cam set

(21) cam

(211) first cams (212) second cams

(22) linking part (23) first axis holes

(24) switch groove

(3) swing arm set

(31) front swing arm

(311) suture needle

(32) rear-swing arm

(321) upper block (322) pivot hole

(4) location group

(41) lower tumbler (42) second axis holes

(5) driving lever group

(51) shifting block (52) driving lever

(6) worm screw

(7) body

(8) first needle gage sutures

(9) second needle gage sutures

The specific embodiment

See also Fig. 1 and 2; Be respectively this whole mechanism exploded perspective sketch map of creating an embodiment and whole mechanism combination schematic perspective view; Wherein, The improvement of Sewing machines mechanism comprises: a worm gear (1), a cam set (2), a swing arm set (3), certain hyte (4) and a driving lever group (5), and its concrete technological means and scheme of carrying out comprises:

One worm gear (1) is to be provided with a wheel shaft (11).

One cam set (2) is to be provided with plural number and concentric cam (21), respectively is provided with a linking part (22) between each cam (21), and in addition, this cam set (2) is provided with first axis hole (23) and that runs through and switches groove (24), and this first axis hole (23) wears the wheel shaft (11) of worm gear; The plural cam (21) of this cam set (2) is to comprise first cam (211) and second cam (212).

One swing arm set (3) is to comprise a front swing arm (31) and a rear-swing arm (32), and this rear-swing arm (32) is provided with a upper block (321) and articulates this front swing arm (31), and in addition, this rear-swing arm (32) is provided with a pivot hole (322); This upper block (321) is to swing up and down and independent rotation with rear-swing arm (32), and front swing arm (31) holds system to be provided with a suture needle (311) before.

Certain hyte (4) is to be provided with a lower tumbler (41) and one second axis hole (42), and this second axis hole (42) wears the wheel shaft (11) of worm gear (1); This lower tumbler (41) is to be fixed in location group (4) and only to make independent rotation.

One driving lever group (5) is to be provided with a shifting block (51) and a driving lever (52), and the end system of this driving lever (52) embeds the switching groove (24) of cam set (2).

By promoting this shifting block (51) driving lever (52) of the switching groove (24) that embeds cam set (2) is moved axially, change the cam (21) that upper block (321) and lower tumbler (41) are contacted, and then drive the action output that swing arm set (3) is made different hunting frequencies.

See also Fig. 3, for this driving lever of creating an embodiment is provided with the position schematic perspective view, wherein the shifting block (51) of driving lever group (5) is body (7) below that exposes to Sewing machines, and the person operates switching with handled easily.

See also Figure 4 and 5 A, 5B; Be respectively this first cam action shaft of creating an embodiment to the cutaway view and the first cam start radial cross-section; And the corresponding first needle gage suture; Wherein, the driving lever (52) when driving lever group (5) switches groove (24) via embedding, when stirring shifting block (51); Aforementioned driving lever (52) contacts with upper block (321) and lower tumbler (41) (being linked to location group (4)) with first cam (211) in the plural cam (21) of axial slip drive cam set (2); Link aforementioned first cam (211) via worm screw (6) transmission worm gear (1) with wheel shaft (11) again and rotate, with first cam (211) be driving link drive do guide wheel on the driven member (321) do with pivot hole (322) (be linked to body, other sees also Fig. 2) for spool; Do the lengthwise movement of near linear (being actually the very little moving-wire of curvature); Indirectly drive the suture needle (311) of being located at front swing arm (31) front end and move up and down so that link this upper block (321) swing arm afterwards (32), to produce like the first needle gage suture (8) (needle gage is bigger, and is thinner) among Fig. 5 B.

When first cam (211) start; Second cam (212) presents the state (promptly not contacting with upper block (321) and lower tumbler (41)) of idle running; And linking part (22) is to switch plane such as height such as Shi Zhi grade as first cam (211) and second cam (212), makes that upper block (321) and lower tumbler (41) are able to do the axial slip switching and be unlikely the generation bump at this linking part (22).

See also Fig. 6 and 7A, 7B; Be respectively this second cam action shaft of creating an embodiment to the cutaway view and the second cam start radial cross-section; And the corresponding second needle gage suture; Wherein, the driving lever (52) when driving lever group (5) switches groove (24) via embedding, when stirring shifting block (51); Aforementioned driving lever (52) contacts with upper block (321) and lower tumbler (41) (being linked to location group (4)) with second cam (212) in the plural cam (21) of axial slip drive cam set (2); Link aforementioned second cam (212) via worm screw (6) transmission worm gear (1) with wheel shaft (11) again and rotate, with second cam (212) be driving link drive do guide wheel on the driven member (321) do with pivot hole (322) (be linked to body, other sees also Fig. 2) for spool; Do the lengthwise movement of near linear (being actually the very little moving-wire of curvature); Indirectly drive the suture needle (311) of being located at front swing arm (31) front end and move up and down so that link this upper block (321) swing arm afterwards (32), to produce like the second needle gage suture (9) (needle gage is less, and is closeer) among Fig. 7 B.

When second cam (212) start; First cam (211) presents the state (promptly not contacting with upper block (321) and lower tumbler (41)) of idle running; And linking part (22) is to switch plane such as height such as Shi Zhi grade as first cam (211) and second cam (212), makes that upper block (321) and lower tumbler (41) are able to do the axial slip switching and be unlikely the generation bump at this linking part (22).

Cam set (2) institute to comprise that first cam (211) and second cam (212) only terminate in be a kind of in the various embodiments.

Comprehensively above-mentioned; This creation system is to the application technology of Sewing machines mechanism improvement; Refering in particular to a kind of shifting block (52) by this driving lever group (5) of promotion moves axially the driving lever (51) of the switching groove (24) that embeds cam set (2); Guide wheel (41) is contacted under guide wheel (321) and the location group (4) on the change swing arm set (3) cam (21) (first cam (211) or second cam (212); System is driven by worm screw (6) transmission worm gear (1)), and then the suture needle (311) that drives swing arm set (3) front end does action output down on the different hunting frequencies, to produce the suture of differing needles distance; Do the improvement and the design of a best, by this creation is done the most concrete progressing greatly for the improvement of Sewing machines mechanism.

Claims

1. a Sewing machines mechanism improvement is characterized in that, comprising:

One worm gear is to be provided with a wheel shaft;

One cam set is to be provided with plural number and concentric cam, respectively is provided with a linking part between each cam, and in addition, this cam set is provided with first axis hole and that runs through and switches groove, and this first axis hole wears the wheel shaft of worm gear;

One swing arm set is to comprise a front swing arm and a rear-swing arm, and this rear-swing arm is provided with a upper block and articulates this front swing arm, and in addition, this rear-swing arm is provided with a pivot hole;

Certain hyte is to be provided with a lower tumbler and one second axis hole, and this second axis hole wears the wheel shaft of worm gear;

2. according to claim 1 Sewing machines mechanism improvement is characterized in that wherein the plural cam-train of this cam set comprises first cam and second cam.

3. according to claim 1 Sewing machines mechanism improvement is characterized in that wherein this upper block system can swing up and down and independent rotation with rear-swing arm.

4. according to claim 1 Sewing machines mechanism improvement is characterized in that wherein end system is provided with a suture needle before this front swing arm.

5. according to claim 1 Sewing machines mechanism improvement is characterized in that wherein this lower tumbler system is fixed in the location group and only makes independent rotation.