阅读说明：本技术 一种具有定位零位功能的缝纫机 (Sewing machine with positioning zero function ) 是由 李质彬 林高宏 吴文俊 于 2021-01-30 设计创作，主要内容包括：本申请提出一种具有定位零位功能的缝纫机,具体涉及缝纫机制造技术领域,包括有的主动轮具有针距调节槽,所述针距调节槽具有针距调节功能,其特征在于,所述针距调节槽具有零点位,所述零点位与送布牙零位定位槽具有的外圆壁处在同心圆弧上。缝纫结束时实现凸轮的送布牙定位杆作用于转动杆的定位送布牙作用面,定位送布牙的零位位置并在零位位置执行剪线,实现剪线后的余线尽可能的短的技术效果。本申请可以避免因送布牙高出针板面而伤及布料的情况发生,提高了针距调节的智能调节水平,本申请针距调节和送布牙的零位位置定位都是基于缝纫机电控系统来控制实现的,提高生产效率的同时减轻了操作人员的劳动强度,具有较高推广使用价值。(The application provides a sewing machine with location zero-bit function, concretely relates to sewing machine makes technical field, the action wheel that includes has the gauge needle adjustment tank, the gauge needle adjustment tank has gauge needle regulatory function, its characterized in that, the gauge needle adjustment tank has the zero point position, the outer circular wall that zero point position and feed dog zero-bit positioning tank have is in concentric circular arc on. 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.)

1. A sewing machine with zero position locating function, comprising a driving wheel (20) provided with a needle distance adjusting groove (211), wherein the needle distance adjusting groove (211) has the needle distance adjusting function, and the sewing machine is characterized in that the needle distance adjusting groove (211) is provided with a zero point position (21a), and the zero point position (21a) and an outer circular wall (21b) of a zero position locating groove (212) of a feed dog are positioned on a concentric circular arc.

2. The sewing machine with the function of zero position as claimed in claim 1, wherein the zero position (21a) is located at a middle position of the needle pitch adjusting groove (211).

3. The sewing machine with the zero position locating function according to claim 1, wherein the driving wheel (20) is provided with a needle pitch adjusting and zero position locating wheel (21), the needle pitch adjusting and zero position locating wheel (21) is provided with a first return-to-zero transition groove (213) and a second return-to-zero transition groove (214), the sliding piece (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 sliding piece (412) into the feed dog zero position locating groove (212) is the feed dog zero position of the sewing machine.

4. The sewing machine with the function of zero position of claim 1, characterized in that the driving wheel (20) has 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 member (412) of a needle distance lever (411) into a feed dog zero position positioning groove (212) of the needle distance adjusting and zero position positioning wheel (21), and a feed long swing plate (33) and a feed short swing plate (32) of a swing seat (30) are pushed to be flush through the needle distance lever (411) and a needle distance adjusting connecting rod (414).

5. The sewing machine with zero position function as claimed in claim 1, wherein the feed dog zero position positioning slot (212) has an outer circular wall (21b) and an inner circular wall (21c), and the slider (412) slides between the outer circular wall (21b) and the inner circular wall (21 c).

6. The sewing machine with the function of zero position setting as claimed in claim 3, 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).

7. The sewing machine with the zero position locating function according to claim 4, characterized in that 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 installed, 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.

8. 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.

9. The sewing machine with the function of zero position location as claimed in claim 4, characterized in that the operating fulcrum of the pitch lever (411) is a slider (412), the slider (412) is located in the middle of the pitch lever (411), one end of the 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 pitch lever (411) is hinged with a pitch adjusting link (414), and the other end of the pitch adjusting link (414) is hinged with the swing seat (30).

10. The sewing machine with the function of positioning the zero position as claimed in claim 1, wherein the driving wheel (20) is sleeved and fixed on the output shaft (11), and the driving wheel (20) has a shaft hole (12) for the output shaft (11) to pass through.

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 a needle for the sewing cloth to puncture, loop and wiring travel, 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 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. 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 thread trimming technique exists, the technical problem of the thread trimming overlength that this application will solve lies in providing a sewing machine with location zero-bit function, the action wheel of including has the gauge needle adjustment tank, the gauge needle adjustment tank has the gauge needle regulatory function, its characterized in that, the gauge needle adjustment tank has the zero point position, the outer circular wall that zero point position and feed dog zero-bit positioning tank have is in on the concentric circular arc.

Preferably, the zero point is located at the middle position of the needle pitch adjusting groove.

Preferably, the driving wheel is provided with a needle pitch adjusting and zero position positioning wheel, the needle pitch adjusting and zero position positioning wheel is provided with a first return-to-zero transition groove and a second return-to-zero transition groove, the sliding piece enters the feed dog zero position positioning groove from the first return-to-zero transition groove or the second return-to-zero 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 driving wheel is provided with a needle pitch adjusting and zero positioning wheel, the driving motor drives the needle pitch adjusting and zero positioning wheel to push the sliding piece of the needle pitch lever to enter the zero positioning groove of the cloth feeding tooth of the needle pitch adjusting and zero positioning wheel, and the needle pitch lever and the needle pitch adjusting connecting rod push the feeding long swinging plate and the feeding short swinging plate of the swinging seat to be flush.

Preferably, the feed dog zero position positioning slot has an outer circular wall and an inner circular wall, and the sliding member slides between the outer circular wall and the inner circular wall.

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 sleeved and fixed on the output shaft, and the driving wheel is provided with a shaft hole through which the output shaft can pass.

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: the device comprises 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 zero position 21a, a feed dog zero position positioning groove 212, an outer circular wall 21b, an inner circular wall 21c, a zero return transition groove I213, a zero return transition groove II 214, a presser foot lifting cam 22, a presser foot lifting action surface I221, a presser foot lifting action surface II 222, a presser foot lifting peak 223, an idle surface 224, a thread trimming crank wheel 23, a rotating column 231, a swinging seat 30, a feeding swinging plate 31, a long swinging plate 33, a feeding short swinging plate 32, a needle pitch lever 411, a sliding part 412, a lever supporting shaft 413, a needle pitch adjusting connecting rod 414, a cloth feeding shaft 51, a cloth feeding crank 52, a swinging connecting rod 53, a presser foot lifting mandril 61, a positioning sleeve 62, a presser foot lever 63, a presser foot lifting execution end 64, a thread trimming fork wheel 71, a fixed shaft 72, a thread trimming action surface 73 and a thread trimming return action, a thread cutting connecting rod 75, a thread cutting end execution end 76, a spindle motor 81 and a 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 above-mentioned pitch adjustment groove 211 has a zero point position 21a, the zero point position 21a is located at the center of the pitch adjustment groove 211, and the zero point position 21a is located on a concentric circular arc with an outer circumferential wall 21b which the feed zero position positioning groove 212 has (shown in fig. 5). 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 feed dog zero-position positioning groove 212 has an outer circular wall 21b and an inner circular wall 21c, and 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, and the slider 412 slides between the outer circular wall 21b and the inner circular wall 21 c. When the sliding member 412 enters the feed dog zero position positioning slot 212 from the needle pitch adjusting slot 211, the sliding member 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 feeding long swing plate 33 and the feeding short swing plate 32 are flush, the swing angle of the feeding long swing plate 33 and the feeding short swing plate 32 in the flush state is zero under the action of the main shaft motor 81 driving the swing connecting rod 53, the position is that the needle pitch adjusting slot 211 has a zero point position 21a, the sliding member 412 is in the zero point position 21a, namely, the feed crank 52 does not swing, the feed shaft 51 does not swing, the feed dog 91 has no front and back feed motion, the sewing machine feed dog zero position is determined, and the thread cutting motion is immediately executed after the feed dog zero point position, so that the technical effect of thread cutting excess is as short as possible.

The thread cutting action is carried out after the sliding piece 412 enters the zero-position positioning groove 212 of the feed dog from the first zero-position transition groove 213 or the second zero-position transition groove 214 and pushes the zero-position positioning groove 212 of the feed dog, namely, the action of carrying out the presser foot lifting is carried out after the zero-position of the feed dog 91 is determined, and the action of carrying out the presser foot lifting is usually carried out after the thread cutting action is finished.

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 and push the zero position positioning groove 212 of the feed dog from the zero position transition groove I213 or the zero position transition groove II 214, so that the presser foot lifting action 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.