CN112779690A - Sewing machine with positioning zero function - Google Patents

Abstract

The application provides a sewing machine with location zero-bit function, concretely relates to sewing machine makes technical field, including driving motor, the action wheel, the gauge needle lever, gauge needle adjusting connecting rod and swing seat, driving motor drive action wheel passes through gauge needle lever and gauge needle adjusting connecting rod and acts on swing seat, the action wheel has gauge needle and adjusts and the zero-bit locating wheel, driving motor drive gauge needle is adjusted and the zero-bit locating wheel promotes the slider that gauge needle lever had and gets into the feed dog zero-bit locating groove that gauge needle adjusted and zero-bit locating wheel had, the slider indirectly acts on swing seat makes swing seat be in the zero-bit state. This application realizes the feed dog locating lever of cam and acts on the location feed dog action face of dwang when sewing, carries out the trimming in zero position, realizes the technical effect that the excess thread after the trimming is as short as possible, and this application gauge needle is adjusted and the zero position location of feed dog all comes the control to realize based on sewing machine electrical system, has higher using value widely.

Description

Sewing machine with positioning zero function

Technical Field

The application provides a sewing machine with location zero position function, concretely relates to sewing machine makes technical field.

Background

The feed dog and the presser foot of the sewing machine are key parts in the sewing and wiring process, the feed dog provides the sewing cloth for the inherent needle distance stroke of the machine needle puncture threading, and the presser foot is used for pressing the cloth to be sewn on the feed dog so as to ensure the smoothness of the cloth in the moving process and realize the tidiness and the attractiveness of sewing stitches. The presser foot and the feed dog are operated in coordination to complete sewing, and at the end of sewing, the sewing machine usually performs thread trimming in an automatic thread trimming manner. The needle pitch is realized by adjusting the swing seat and is divided into a negative needle pitch and a positive needle pitch, and the zero point of the negative needle pitch and the zero point of the positive needle pitch are zero positions of the swing seat. When the movable trimming knife and the fixed trimming knife are matched for trimming, the needle stop positions of a needle, a presser foot and a feed dog cannot be changed, the stop position of the feed dog is always higher than the surface of a needle plate, the needle, the presser foot, the feed dog and the fixed trimming knife are far away, and obviously, the length of a residual thread after trimming is different due to the difference of the stop positions of the feed dog, so that the thread end left on a sewing material is longer after the movable trimming knife and the fixed trimming knife are matched for trimming, the uncertainty of the stop position of the feed dog influences the trimming quality of the sewing machine, an operator needs to trim the residual thread again according to different cloth qualities, and the sewing efficiency is reduced. In addition, when the feed dog is left above the needle plate surface, an operator is required to adjust the hand wheel to enable the feed dog to sink below the needle plate surface, so that the labor intensity of the operator is increased, and the sewing work is inconvenient. Under the condition that an operator does not find that the cloth feeding teeth are too high, if sewing is started, the cloth feeding teeth are easy to hook the cloth, the cloth is damaged, and the production efficiency is influenced.

Disclosure of Invention

To the defect that current trimming technique exists, the technical problem of trimming overlength that this application will solve lies in providing a sewing machine with location zero-bit function, including driving motor, action wheel, gauge needle lever, gauge needle regulation connecting rod and swing seat, driving motor drive action wheel passes through gauge needle lever and gauge needle regulation connecting rod and acts on swing seat, its characterized in that, the action wheel has gauge needle and adjusts and zero-bit locating wheel, driving motor drive gauge needle is adjusted and zero-bit locating wheel promotes the slider that gauge needle lever has and gets into the feed dog zero-bit constant head tank that gauge needle was adjusted and zero-bit locating wheel has, the slider indirectly acts on swing seat makes swing seat be in the zero-bit state.

Preferably, the stitch length adjusting and zero position positioning wheel is provided with a first zero return transition groove and a second zero return transition groove, the sliding piece enters the feed dog zero position positioning groove from the first zero return transition groove or the second zero return transition groove, and the feed dog zero position of the sewing machine is determined when the sliding piece enters the feed dog zero position positioning groove.

Preferably, the needle pitch adjusting and zero position positioning wheel pushes the sliding part under the driving of the driving motor to change the action position of the needle pitch adjusting groove of the needle pitch adjusting and zero position positioning wheel, and then the original swing angle of the swing seat is changed through the needle pitch lever and the needle pitch adjusting connecting rod.

Preferably, the driving wheel is provided with a shaft hole through which the output shaft can pass, the driving wheel is mounted on the output shaft of the driving motor and used for realizing the needle pitch adjusting action, the zero position positioning action of the feed dog, the presser foot lifting action and the thread trimming action of the sewing machine at different time periods, and different functional wheels of the driving wheel complete the needle pitch adjusting action, the zero position positioning action of the feed dog, the presser foot lifting action and the thread trimming action under the driving of the driving motor in different driving corners.

Preferably, two ends of the needle pitch adjusting groove adjacent to the zero-position positioning groove of the feed dog are respectively a zero-return transition groove I and a zero-return transition groove II, and the sliding piece enters the zero-position positioning groove of the feed dog from the zero-return transition groove I or the zero-return transition groove II and pushes the zero-position positioning groove of the feed dog to perform thread cutting action.

Preferably, the working fulcrum of the needle gauge lever is a sliding part, the sliding part is located in the middle of the needle gauge lever, one end of the needle gauge lever is hinged with a lever supporting shaft, the lever supporting shaft is located on the machine body, the other end of the needle gauge lever is hinged with a needle gauge adjusting connecting rod, and the other end of the needle gauge adjusting connecting rod is hinged with a swinging seat.

Preferably, the driving wheel is provided with a trimming crank wheel, a rotating column of the trimming crank wheel is positioned in an idle stroke between a trimming acting surface and a trimming return acting surface of the trimming fork wheel, the trimming fork wheel is fixed on the fixed shaft, and the trimming acting surface is hinged with the trimming connecting rod.

Preferably, the driving wheel is provided with a presser foot lifting cam, the presser foot lifting cam is provided with a first presser foot lifting action surface, a second presser foot lifting action surface and an idle running surface, a presser foot lifting peak is arranged between the first presser foot lifting action surface and the second presser foot lifting action surface, and the driving motor drives the presser foot lifting cam to lift the presser foot lifting ejector rod or enter the zero position positioning groove of the cloth feeding tooth from the first zero position transition groove or the second zero position transition groove to execute zero position presser foot lifting action.

Preferably, the presser foot lifting ejector rod is sleeved in the positioning sleeve, the presser foot lifting ejector rod is hinged with a presser foot lifting lever, the presser foot lifting lever is connected with the end execution end of the presser foot lifting, and then the presser foot lifting action is executed by the end execution end of the presser foot lifting.

Preferably, the driving wheel is provided with a needle pitch adjusting and zero position positioning wheel, a presser foot lifting cam and a thread trimming crank wheel which are respectively fixedly arranged on the output shaft, and the presser foot lifting cam is positioned between the needle pitch adjusting and zero position positioning wheel and the thread trimming crank wheel.

The sewing machine with the zero position positioning function has the advantages that the cam is driven by the driving motor and then drives the rotating rod, and the sewing machine can realize the needle pitch adjustment action in the stop state; when the sewing is finished, the cloth feeding tooth positioning rod of the cam acts on the positioning cloth feeding tooth acting surface of the rotating rod, the zero position of the cloth feeding tooth is positioned, the thread trimming is executed at the zero position, and the technical effect that the residual thread after the thread trimming is as short as possible is achieved. The condition that can avoid hindering the cloth because of work feed dog exceeds the needle face takes place, has improved the intelligent regulation level that the gauge needle was adjusted, and the zero position location of this application gauge needle regulation and work feed dog all controls the realization based on sewing machine electrical system, has alleviateed operating personnel's intensity of labour when improving production efficiency, has higher using value widely.

Drawings

FIG. 1 is a diagrammatic view of a sewing machine configuration having a zero position function of the present application;

FIG. 2 is a schematic view of a feed dog positioning wheel and stitch length adjustment of a sewing machine having a zero position function according to the present application;

FIG. 3 is a schematic view of a needle pitch adjustment and swing seat of a sewing machine having a zero position function according to the present application;

FIG. 4 is a schematic view of a needle distance adjusting groove of a sewing machine having a function of positioning a zero position according to the present application;

FIG. 5 is a side view of a sewing machine main drive wheel with zero position function of the present application;

FIG. 6 is a schematic view of a stitch length dial bar of a sewing machine having a zero position function according to the present application;

FIG. 7 is a thread trimming structure of a sewing machine having a function of positioning a zero position according to the present application;

FIG. 8 is a schematic view of a presser foot cam of a sewing machine with zero position function of the present application.

Reference numerals: a driving motor 10, an output shaft 11, a shaft hole 12, a driving wheel 20, a needle pitch adjusting and zero position positioning wheel 21, a needle pitch adjusting groove 211, a feed dog zero position positioning groove 212, a zero return transition groove one 213, a zero return transition groove two 214, a presser foot lifting cam 22, a presser foot lifting action surface one 221, a presser foot lifting action surface two 222, a presser foot lifting peak 223, an idle rotation surface 224, a thread cutting crank wheel 23, a rotation column 231, a swing seat 30, a feeding swing plate 31, a long swing plate 33, a feeding short swing plate 32, a needle pitch lever 411, a sliding part 412, a lever support shaft 413, a needle pitch adjusting connecting rod 414, a cloth feeding shaft 51, a cloth feeding crank 52, a swing connecting rod 53, a presser foot lifting mandril 61, a positioning sleeve 62, a presser foot lifting lever 63, a presser foot end executing end 64, a thread cutting fork wheel 71, a fixing shaft 72, a thread cutting action surface 73, a thread cutting returning action surface 74, a thread cutting connecting rod 75, a thread cutting executing end 76, a main shaft motor 81, the feed dog 91.

Detailed Description

Preferred embodiments of the present application will be described in detail below with reference to fig. 1 to 8, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application will be clearly and clearly defined, and these embodiments are only for illustrating the present invention and are not limited thereto.

The utility model provides a sewing machine with location zero-bit function is including driving motor 10, install action wheel 20 on the output shaft 11 that driving motor 10 has, action wheel 20 is used for realizing sewing machine's gauge needle regulation action, feed dog zero-bit location action, lift presser foot action and trimming action at different time quantums, above-mentioned four sewing actions are in each drive corner of driving motor 10, four sewing actions are accomplished under the drive of driving motor 10 to different function wheels that driving wheel 20 has in different drive corners.

The driving wheel 20 has three functional wheels, namely a needle pitch adjusting and zero position positioning wheel 21, a presser foot lifting cam 22 and a thread trimming crank wheel 23, the needle pitch adjusting and zero position positioning wheel 21, the presser foot lifting cam 22 and the thread trimming crank wheel 23 are integrally combined into the driving wheel 20, the three functional wheels can be independently arranged and respectively installed and fixed on the output shaft 11, and the presser foot lifting cam 22 is positioned between the needle pitch adjusting and zero position positioning wheel 21 and the thread trimming crank wheel 23 regardless of combination or independent arrangement. In addition, the driving wheel 20 has a shaft hole 12 through which the output shaft 11 can pass, and the driving wheel 20 is fixed on the output shaft 11 in a sleeved manner.

The gauge adjustment and zero position positioning wheel 21 has a gauge adjustment groove 211, a feed dog zero position positioning groove 212, a zero return transition groove one 213 and a zero return transition groove two 214, and two ends of the gauge adjustment groove 211 adjacent to the feed dog zero position positioning groove 212 are the zero return transition groove one 213 and the zero return transition groove two 214 respectively. The needle pitch adjusting groove 211 is correspondingly matched with a needle pitch lever 411, the working fulcrum of the needle pitch lever 411 is a sliding piece 412, the sliding piece 412 is positioned in the middle of the needle pitch lever 411, and the sliding piece 412 slides and works between the needle pitch adjusting groove 211, the feed dog zero-position positioning groove 212 and the two sections of return zero-position transition grooves 213 in a matched mode according to sewing actions. One end of the pitch lever 411 is hinged with a lever supporting shaft 413, the lever supporting shaft 413 is positioned on the machine body 415, and the lever supporting shaft 413 plays a role of a lever fulcrum of the pitch lever 411. The other end of the needle pitch lever 411 is hinged with a needle pitch adjusting connecting rod 414, and the other end of the needle pitch adjusting connecting rod 414 is hinged with the swinging seat 30. The stitch length adjustment is to rotate the stitch length adjustment and zero position positioning wheel 21 by a certain angle by the driving motor 10 to change the action position of the sliding member 412 in the stitch length adjustment groove 211, that is, the stitch length adjustment groove 211 pushes the sliding member 412, so as to change the original swing angle of the swing seat 30 through the stitch length lever 411 and the stitch length adjustment connecting rod 414, thereby realizing the stitch length adjustment. The stitch length adjustment is performed in a state where the sewing machine is stopped, and the stitch length after the adjustment is successful is given to the swing base 30 as a new fixed stitch length.

When the thread cutting is needed after the sewing is finished, the sliding piece 412 is separated from the stitch length adjusting groove 211 and enters the feed dog zero-position positioning groove 212 through the first zero-position transition groove 213 or the second zero-position transition groove 214. The slider 412 enters the feed dog zero position positioning groove 212 to perform the feed dog zero position positioning operation of the sewing machine. When the sliding part 412 enters the feed dog zero position positioning groove 212 from the needle pitch adjusting groove 211, the sliding part 412 and the needle pitch lever 411 push the feeding swing plate 31 of the swing seat 30 through the needle pitch adjusting connecting rod 414, so that the sliding part 412 of the needle pitch lever 411 indirectly acts on the swing seat to enable the swing seat 14 to be in a zero position state, and particularly, the internal characteristics of the swing seat 14 are that the feeding long swing plate 33 and the feeding short swing plate 32 are flush, the feeding long swing plate 33 and the feeding short swing plate 32 in the flush state are zero in swing angle under the action of the main shaft motor 81 driving the swing connecting rod 53, namely, the feeding crank 52 does not swing, the feeding shaft 51 does not swing, the feed dog 91 is accordingly free of front and back feeding actions, the sewing machine feed dog zero position is determined, and the thread cutting action is immediately executed after the feed dog zero position, and the technical effect that the thread cutting residual thread is as short as possible is realized.

The thread trimming operation is performed after the sliding member 412 enters the feed dog zero-position positioning groove 212 from the return-to-zero transition groove one 213 or the return-to-zero transition groove two 214 and pushes the feed dog zero-position positioning groove 212, that is, the thread lifting operation is performed after the feed dog zero-position is determined, and the thread lifting operation is performed after the thread trimming operation is completed.

When the sliding member 412 in the feed dog positioning wheel 21 starts to enter the feed dog zero-position positioning slot 212 and pushes the stitch length adjusting link 414 to make the feeding long swinging plate 33 and the feeding short swinging plate 32 flush, the rotating column 231 of the trimming crank wheel 23 applies a pushing force to the trimming acting surface 73 of the trimming fork wheel 71 in the trimming rotation angle of the driving motor 10, and then the trimming acting surface 73 pushes the trimming end executing end 76 to execute a trimming action.

The thread cutting fork wheel 71 is positioned on the fixed shaft 72 by using the fixed shaft 72 as a rotating shaft, and a thread cutting action surface 73 and a thread cutting return action surface 74 of the thread cutting fork wheel 71 are pushed by the rotating column 231 to rotate along with the fixed shaft 72. The thread cutting action surface 73 is hinged to the thread cutting connecting rod 75, the thread cutting action surface 73 is stressed to push the thread cutting connecting rod 75 to press downwards, the thread cutting connecting rod 75 pushes the thread cutting end execution end 76 to execute thread cutting action, and thread cutting under the zero position state is achieved.

The rotating column 231 is located between the trimming acting surface 73 and the trimming returning acting surface 74, the rotating column 231 is located in the idle stroke between the trimming acting surface 73 and the trimming returning acting surface 74, and the feed dog positioning wheel 21 is driven by the spindle motor 81 through the swinging connecting rod 53 to idle the rotating column 231 in the idle stroke in normal sewing, so that the sewing machine of the application cannot actually act on trimming during normal sewing. The thread cutting return action surface 74 is used for returning the thread cutting fork wheel 71 to the original position of thread cutting after thread cutting, when the rotating column 231 presses the thread cutting action surface 73, that is, the rotating column 231 rotates for one circle, not only thread cutting is performed, but also the integral return of the thread cutting fork wheel 71 is completed.

When the sliding member 412 inside the feed dog positioning wheel 21 enters the feed dog zero position positioning groove 212 to complete the zero position thread cutting operation, the sewing machine immediately performs the presser foot lifting operation. The presser foot lifting cam 22 has a first presser foot lifting action surface 221, a second presser foot lifting action surface 222 and an idle surface 224, and a presser foot lifting peak 223 is formed between the first presser foot lifting action surface 221 and the second presser foot lifting action surface 222. In the thread trimming, the presser foot lifting push rod 61 abuts against the idle surface 224 of the presser foot lifting cam 22, so that the sewing machine does not actually operate the presser foot lifting in normal sewing and thread trimming operations.

The drive motor 10 performs a presser foot raising operation within the presser foot raising corner. The driving motor 10 drives the presser foot lifting cam 22 to lift the presser foot lifting ejector rod 61, and the sliding piece 412 can enter from the first zero position transition groove 213 or the second zero position transition groove 214 and push the feed dog zero position positioning groove 212 to the zero position, so that the action of lifting the presser foot in the zero position state of the application is realized. The first presser foot action surface 221 or the second presser foot action surface 222 of the presser foot lifting cam 22 can reach the presser foot lifting highest point 223 for the presser foot lifting ram 61, and the presser foot lifting ram 61 can return to the starting point position from the first zero position transition groove 213 or the second zero position transition groove 214. The presser foot lifting ejector rod 61 is sleeved in the positioning sleeve 62, the presser foot lifting ejector rod 61 is hinged to the presser foot lifting lever 63, the presser foot lifting lever 63 is connected with the presser foot lifting end execution end 64, the presser foot lifting end execution end 64 executes the presser foot lifting action, and the presser foot lifting action at the zero position is realized through the presser foot lifting action, so that the sewing machine has higher technical value.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. A sewing machine with a zero position positioning function comprises a driving motor (10), a driving wheel (20), a needle distance lever (411), a needle distance adjusting connecting rod (414) and a swinging seat (30), wherein the driving motor (10) drives the driving wheel (20) to act on the swinging seat (30) through the needle distance lever (411) and the needle distance adjusting connecting rod (414), and is characterized in that the driving wheel (20) is provided with a needle distance adjusting and zero position positioning wheel (21), the driving motor (10) drives the needle distance adjusting and zero position positioning wheel (21) to push a sliding piece (412) of the needle distance lever (411) to enter a cloth feeding tooth zero position positioning groove (212) of the needle distance adjusting and zero position positioning wheel (21), and the sliding piece (412) indirectly acts on the swinging seat (30) to enable the swinging seat (30) to be in a zero position state.

2. The sewing machine with the zero position locating function according to claim 1, wherein the needle pitch adjusting and zero position locating wheel (21) has a first return-to-zero transition groove (213) and a second return-to-zero transition groove (214), the slider (412) enters the feed dog zero position locating groove (212) from the first return-to-zero transition groove (213) or the second return-to-zero transition groove (214), and the entering of the slider (412) into the feed dog zero position locating groove (212) is the feed dog zero position of the sewing machine.

3. The sewing machine with the function of zero position setting as claimed in claim 1, wherein the needle pitch adjusting and zero position setting wheel (21) is driven by the driving motor (10) to push the slider (412) to change the action position with the needle pitch adjusting groove (211) of the needle pitch adjusting and zero position setting wheel (21), and then the original swing angle of the swing seat (30) is changed through the needle pitch lever (411) and the needle pitch adjusting link (414).

4. The sewing machine with the zero position locating function according to claim 1, wherein the driving wheel (20) has a shaft hole (12) for passing the output shaft (11), the driving motor (10) has an output shaft (11) on which the driving wheel (20) is mounted, the driving wheel (20) is used for realizing the needle pitch adjusting action, the feed dog zero position locating action, the presser foot lifting action and the thread trimming action of the sewing machine at different time periods, and the driving wheel (20) has different functional wheels which complete the needle pitch adjusting action, the feed dog zero position locating action, the presser foot lifting action and the thread trimming action under the driving of the driving motor (10) in different driving rotation angles.

5. The sewing machine with the zero position locating function according to claim 1, wherein the needle pitch adjusting groove (211) and the feed dog zero position locating groove (212) are respectively provided with a return zero transition groove I (213) and a return zero transition groove II (214) at two ends adjacent to each other, and the slider (412) enters the feed dog zero position locating groove (212) from the return zero transition groove I (213) or the return zero transition groove II (214) and pushes the feed dog zero position locating groove (212) to start the thread cutting action.

6. The sewing machine with the function of zero position location as claimed in claim 1, wherein the operating fulcrum of the needle pitch lever (411) is a slider (412), the slider (412) is located in the middle of the needle pitch lever (411), one end of the needle pitch lever (411) is hinged with a lever support shaft (413), the lever support shaft (413) is located on the machine body (415), the other end of the needle pitch lever (411) is hinged with a needle pitch adjusting link (414), and the other end of the needle pitch adjusting link (414) is hinged with the swing seat (30).

7. The sewing machine with the function of zero position, as set forth in claim 1, characterized in that the drive wheel (20) has a trimming crank wheel (23), the trimming crank wheel (23) having a rotation column (231) located in the idle stroke between a trimming action surface (73) and a trimming return action surface (74) of a trimming fork wheel (71), the trimming fork wheel (71) being fixed to a fixed shaft (72), the trimming action surface (73) being hinged to the trimming link (75).

8. The sewing machine with the zero position positioning function as claimed in claim 1, wherein the driving wheel (20) is provided with a presser foot lifting cam (22), the presser foot lifting cam (22) is provided with a first presser foot lifting action surface (221), a second presser foot lifting action surface (222) and an idle surface (224), a presser foot lifting peak (223) is arranged between the first presser foot lifting action surface (221) and the second presser foot lifting action surface (222), and the driving motor (10) drives the presser foot lifting cam (22) to lift the presser foot lifting mandril (61) or enter the feed dog zero position positioning slot (212) from the first zero position transition slot (213) or the second zero position transition slot (214) to perform zero position presser foot lifting action.

9. The sewing machine with the function of zero position setting as claimed in claim 1, wherein the presser foot lifting ejector rod (61) is sleeved in the positioning sleeve (62), the presser foot lifting ejector rod (61) is hinged with a presser foot lifting lever (63), the presser foot lifting lever (63) is connected with a presser foot lifting end execution end (64), and the presser foot lifting action is executed by the presser foot lifting end execution end (64).

10. The sewing machine with the function of zero position as claimed in claim 1, wherein the driving wheel (20) has a needle pitch adjusting and zero position positioning wheel (21), a presser foot lifting cam (22) and a thread cutting crank wheel (23) which are respectively mounted and fixed on the output shaft (11), and the presser foot lifting cam (22) is positioned between the needle pitch adjusting and zero position positioning wheel (21) and the thread cutting crank wheel (23).

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