CN213978113U

CN213978113U - Dynamic adjusting mechanism for thread supply amount of sewing machine

Info

Publication number: CN213978113U
Application number: CN202022732656.6U
Authority: CN
Inventors: 甘成杰; 郏彬辉; 祝书伟
Original assignee: Jack Sewing Machine Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-08-17
Anticipated expiration: 2030-11-23

Abstract

The utility model relates to a flush joint machine face line supplies dynamic adjustment mechanism of line volume, including movable hook, presser foot connecting piece, rotary rod and the drive assembly who connects presser foot connecting piece and rotary rod, the presser foot connecting piece lifts presser foot fixed connection with the flush joint machine, the rotary rod is rotationally installed in the casing of flush joint machine, and the rotary rod is the level and arranges, rotary rod and movable hook fixed connection, utilize drive assembly to drive the rotary rod during the presser foot connecting piece up-and-down motion and rotate. The movable wire hook replaces a right wire hook in the existing design, the presser foot connecting piece moves vertically up and down along with the lifting of the presser foot, the movable wire hook is driven to rotate through the transmission assembly, and the position of the movable wire hook changes, so that the wire supply amount is dynamically adjusted.

Description

Dynamic adjusting mechanism for thread supply amount of sewing machine

Technical Field

The utility model relates to a sewing machine field, concretely relates to flush joint machine face line supplies dynamic adjustment mechanism of line volume.

Background

The thread supply amount of the existing flat sewing machine cannot be changed in real time in the sewing process, however, the thread supply amount may be changed in real time in the sewing process, and the thread breakage occurs when the supply and demand are not matched and the sewn cloth passes through the rib peduncle easily. Present flush joint machine adopts fixed thread guide, refers to figure 1, and the facial suture is colluded 1 through left side line in proper order, and take-up lever 2, guide wire pole 3 and right side line collude 4, and the initiative supply line volume colludes 1 by left side line, and take-up lever 2 colludes 4 three position decisions, the formula of initiative supply line volume with right side line: l is (d1-d3) + (d2-d4), where d1 is the distance between the left hook 1 and the thread take-up lever 2 at the highest position of the thread take-up lever, d2 is the distance between the right hook 4 and the thread take-up lever 2 at the highest position of the thread take-up lever, d3 is the distance between the left hook 1 and the thread take-up lever 2 at the lowest position of the thread take-up lever, and d4 is the distance between the right hook 4 and the thread take-up lever 2 at the lowest position of the thread take-up lever. Because the left thread hook 1, the take-up lever 2 and the right thread hook 4 in the existing mechanism are fixed in position, the thread supply amount can not be actively changed along with the change of sewing working conditions.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the to-be-solved technical problem of the utility model is to provide a facial line supplies line volume dynamic adjustment mechanism, can be according to lifting presser foot change dynamic adjustment supply line volume when making up the work.

In order to achieve the above object, the utility model provides a flush joint machine face line supplies dynamic adjustment mechanism of line volume, including movable hook, presser foot connecting piece, rotary rod and the drive assembly who connects presser foot connecting piece and rotary rod, the presser foot connecting piece lifts presser foot fixed connection with the flush joint machine, the rotary rod is rotationally installed in the casing of flush joint machine, and the rotary rod is the level and arranges, rotary rod and movable hook fixed connection, utilize drive assembly to drive the rotary rod rotation during the presser foot connecting piece up-and-down motion.

Furthermore, the transmission assembly comprises a wire hook oscillating bar, a connecting rod A, a fixed pin shaft, an oscillating plate and an oscillating connecting structure, wherein the fixed pin shaft is fixed on the machine shell, the middle part of the oscillating plate is rotatably arranged on the fixed pin shaft, one end of the oscillating plate is hinged with one end of the connecting rod A, the other end of the oscillating plate is connected with the presser foot connecting piece by the oscillating connecting structure, the other end of the connecting rod A is hinged with one end of the wire hook oscillating bar, and the other end of the wire hook oscillating bar is connected with a rotary rod and is fixed on the circumferential direction of the rotary rod; and when the presser foot connecting piece moves up and down, the swing connecting structure is used for driving the swing plate to swing up and down.

Furthermore, the swing connecting structure comprises a connecting rod B, and two ends of the connecting rod B are respectively hinged with the swing plate and the presser foot connecting piece.

Furthermore, the swing connecting structure comprises a fixed connecting pin fixed on the presser foot connecting piece, one end of the swing plate is provided with a sliding groove, and the fixed connecting pin is arranged in the sliding groove and can slide along the sliding groove.

Further, still including rotationally installing the rotation installation axle in the casing, it is coaxial fixed with the rotary rod to rotate the installation axle, wire hook pendulum rod one end cup joints on the rotation installation axle, and is fixed in rotation installation axle circumference.

Further, the rotating mounting shaft is in threaded connection with the rotating rod.

Furthermore, a vertical strip-shaped groove is formed in the presser foot connecting piece, the presser foot connecting piece is connected with the lifting presser foot through a fixing bolt, and the fixing bolt penetrates through the vertical strip-shaped groove.

Further, the rotation angle range of the rotation lever is 40 °.

As described above, the utility model relates to a dynamic adjustment mechanism has following beneficial effect:

through setting up, activity hook, presser foot connecting piece, rotary rod and drive assembly, during the use, the facial suture of flush joint machine is in proper order after left hook and take-up lever, through activity hook and rotary rod again, and the right hook in the current design is replaced to the activity hook, and the rotary rod plays the guide effect. When the sewing thickness changes, the pressure foot lifting device passively moves up and down, the pressure foot connecting piece fixedly connected with the pressure foot lifting device vertically moves up and down, the rotating rod is driven by the transmission assembly to rotate for a certain angle around the axis of the rotating rod, the rotating rod drives the movable thread hook to rotate for a certain angle, the position of the movable thread hook changes, the distance between the movable thread hook and the thread take-up lever changes, and therefore the thread supply amount changes. The utility model discloses a dynamic adjustment mechanism can be along with making the thickness change, through lifting the change condition at presser foot angle, adjusts the face line supply quantity dynamically, can effectively reduce broken string problems such as cross bone.

Drawings

Fig. 1 is a schematic structural view of a thread passage of an upper thread in a conventional design.

Fig. 2 is a schematic structural diagram of a first embodiment of the dynamic adjustment mechanism of the present invention.

Fig. 3 is an exploded view of the structure of fig. 2.

Fig. 4 is a schematic structural diagram of a second embodiment of the dynamic adjustment mechanism of the present invention.

Fig. 5 is a schematic working diagram of the dynamic adjustment mechanism of the present invention.

Description of the element reference numerals

1 left line hook

2 take-up lever

3 wire guide rod

4 right line hook

5 Movable wire hook

6 rotating rod

7 rotating installation shaft

7a gasket

8 swing link

9 connecting rod A

10 fixed pin shaft

11 swing plate

11a chute

12 connecting rod B

13 presser foot connecting piece

13a vertical strip groove

14 short pin

15 fastening pin

16 face line

17 casing

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.

Referring to fig. 2 to 5, the utility model provides a flat bed sewing machine face line volume of supplying thread dynamic adjustment mechanism, including movable wire hook 5, presser foot connecting piece 13, rotary rod 6, and the drive assembly who connects presser foot connecting piece 13 and rotary rod 6, presser foot connecting piece 13 and flat bed sewing machine lift presser foot fixed connection, rotary rod 6 rotationally installs in flat bed sewing machine's casing 17, and rotary rod 6 is the level and arranges, rotary rod 6 and movable wire hook 5 fixed connection, utilize drive assembly to drive rotary rod 6 to rotate during presser foot connecting piece 13 up-and-down motion. Wherein, the presser foot connecting piece 13 can be fixed on a pressure lever guide frame of the presser foot.

The utility model relates to a dynamic adjustment mechanism's basic operating principle does: referring to fig. 5, the upper thread 16 of the flat sewing machine sequentially passes through the left thread hook 1 and the thread take-up lever 2, and then passes through the movable thread hook 5 and the rotary rod 6, the movable thread hook 5 replaces the right thread hook 4 in the existing design, and the rotary rod 6 plays a guiding role. When the sewing thickness changes, the pressure foot is lifted to move up and down passively, the pressure foot connecting piece 13 fixedly connected with the pressure foot is moved vertically and up and down along with the pressure foot, the transmission component is utilized to drive the rotating rod 6 to rotate a certain angle around the axis of the rotating rod 6, the rotating rod 6 drives the movable wire hook 5 to rotate a certain angle, the position of the movable wire hook 5 changes, the distance between the movable wire hook 5 and the thread take-up lever 2 changes, namely the active thread supply formula L (d1-d3) + (d2-d4) changes d2 and d4, and therefore the thread supply quantity changes. The utility model discloses a dynamic adjustment mechanism can be along with making the thickness change, through lifting the change condition at presser foot angle, adjusts the 16 supply quantities of facial suture dynamically, can effectively reduce broken string problems such as cross bone.

Referring to fig. 2 to 4, the present invention will be further explained with two specific embodiments.

The first embodiment is as follows:

referring to fig. 1 and 2, in the present embodiment, the presser foot connector 13 and the transmission assembly of the dynamic adjustment mechanism are located in the housing 17 of the flat bed sewing machine, wherein the transmission assembly includes a rotating installation shaft 7, a hook swing link 8, a connecting rod a9, a fixed pin 10, a swing plate 11, and a connecting rod B12, the rotating installation shaft 7 is rotatably installed in an installation hole of the housing 17 (not shown in the drawings), one end of the rotating rod 6 is fixedly connected with the movable hook 5, the other end is fixed in the rotating installation shaft 7, and the two are in threaded connection, the rotating rod 6 is stably installed through the rotating installation shaft 7, can smoothly rotate, and the position of the rotating rod 6 is kept stable and inconvenient.

The fixed pin shaft 10 is fixed on the machine shell 17, the middle part of the swing plate 11 is rotatably installed on the fixed pin shaft 10, one end of the swing plate 11 is hinged with one end of a connecting rod A9, the other end of the swing plate is hinged with one end of a connecting rod B12, the other end of the connecting rod B12 is hinged with a presser foot connecting piece 13, the other end of the connecting rod A9 is hinged with one end of a wire hook swing rod 8, the other end of the wire hook swing rod 8 is sleeved on the rotating installation shaft 7 and fixed on the circumference of the rotating installation shaft 7, a gasket 7a is arranged at the end part of the rotating installation shaft 7, the gasket 7a is located between the wire hook swing rod 8 and the machine shell 17, and the wire hook swing rod 8 is prevented from contacting and rubbing with the machine shell 17 when rotating. Wherein, the wire hook swing rod 8 is hinged with the connecting rod A9, the connecting rod A9 is hinged with the swinging plate 11, the connecting rod B12 is hinged with the swinging plate 11, and the connecting rod B12 is hinged with the presser foot connecting piece 13 through the short pin 14. The link B12 is a swing link structure for converting the vertical movement of the presser foot link 13 into vertical swing of the swing plate 11. Therefore, when the presser foot connecting piece 13 moves vertically up and down along with the lifting of the presser foot, the swinging plate 11 is driven to swing up and down around the fixed pin shaft 10 through the connecting rod B12, and then the wire hook swinging rod 8 is driven to swing up and down through the connecting rod A9, so that the rotating installation shaft 7 and the rotating rod 6 are driven to rotate, and the rotation of the movable wire hook 5 is realized. The transmission assembly in the embodiment adopts a five-connecting-rod movement mechanism, and the structure is stable in movement.

In the embodiment, referring to fig. 1, as a preferable design, a vertical groove 13a is provided on the presser foot connector 13, the presser foot connector 13 and the lifting presser foot are connected by a fixing bolt, and the fixing bolt is inserted into the vertical groove 13a, so that the relative position of the presser foot connector 13 and the lifting presser foot is adjusted by adjusting the position of the bolt in the vertical groove 13a during installation. The vertical strip-shaped groove 13a can compensate for the range change of the line hook corner caused by errors such as machining, assembly and the like, and is flexible to install. In practical design, through the vertical strip-shaped groove 13a, about 7mm more thread can be provided in the process of forming the stitch in the safe moving range.

Example two:

referring to fig. 4, the present embodiment is a modification of the first embodiment, and the differences are as follows: the swing connecting structure for connecting the swing plate 11 and the presser foot connecting piece 13 is different, in the first embodiment, the presser foot connecting piece 13 is in transmission connection with the swing plate 11 by using the connecting rod B12, while in the present embodiment, the connecting rod B12 is eliminated, and the presser foot connecting piece 13 is in transmission connection with the swing plate 11 by using the matching of the fixed pin 15 and the chute 11a on the swing plate 11, and the structures of other places are the same. Specifically, referring to fig. 4, one end of the swing plate 11 is hinged to one end of the connecting rod a9, the other end is provided with a chute 11a, the fixing pin 15 is fixed on the presser foot connecting piece 13 and is installed in the chute 11a of the swing plate 11, when the presser foot connecting piece 13 moves up and down, the fixing pin 15 also moves up and down along with the fixing pin, the fixing pin 15 slides in the chute and drives the swing plate 11 to swing up and down, and the movement relationship of the rest parts is the same as that in the first embodiment, and therefore, the description is omitted.

The utility model discloses a dynamic adjustment mechanism rationally designs the debugging to the drive assembly between presser foot connecting piece 13 and the rotary rod 6, ensures that the functional relation between the 5 displacement volumes of activity line hook and the 13 displacement volumes of presser foot connecting piece satisfies sewing work's requirement, ensures simultaneously that the turned angle scope of activity line hook 5 is in a requirement within range, and in actual design, the turned angle security territory of activity line hook 5 is 40 degrees.

The utility model discloses a dynamic adjustment mechanism, transmission assembly wherein is not limited to the form in above-mentioned embodiment one and embodiment two, can also adopt other suitable design structure according to factors such as motion relation requirement of flush joint machine between the peripheral structure, presser foot connecting piece 13 and the rotary rod 6 of this department.

To sum up, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a flush joint machine face line volume of supplying line dynamic adjustment mechanism which characterized in that: the sewing machine comprises a movable thread hook (5), a presser foot connecting piece (13), a rotary rod (6) and a transmission assembly for connecting the presser foot connecting piece (13) and the rotary rod (6), wherein the presser foot connecting piece (13) is fixedly connected with a presser foot of the sewing machine, the rotary rod (6) is rotatably arranged in a machine shell (17) of the sewing machine, the rotary rod (6) is horizontally arranged, the rotary rod (6) is fixedly connected with the movable thread hook (5), and the transmission assembly is utilized to drive the rotary rod (6) to rotate when the presser foot connecting piece (13) moves up and down.

2. The dynamic adjustment mechanism of claim 1, wherein: the transmission assembly comprises a wire hook oscillating bar (8), a connecting rod A (9), a fixed pin shaft (10), an oscillating plate (11) and an oscillating connecting structure, the fixed pin shaft (10) is fixed on the machine shell (17), the middle part of the oscillating plate (11) is rotatably arranged on the fixed pin shaft (10), one end of the oscillating plate (11) is hinged with one end of the connecting rod A (9), the other end of the oscillating plate (11) is connected with the presser foot connecting piece (13) through the oscillating connecting structure, the other end of the connecting rod A (9) is hinged with one end of the wire hook oscillating bar (8), and the other end of the wire hook oscillating bar (8) is connected with the rotating rod (6) and is fixed on the circumferential direction of the rotating rod (6); when the presser foot connecting piece (13) moves up and down, the swing connecting structure is utilized to drive the swing plate (11) to swing up and down.

3. The dynamic adjustment mechanism of claim 2, wherein: the swing connecting structure comprises a connecting rod B (12), and two ends of the connecting rod B (12) are respectively hinged with the swing plate (11) and the presser foot connecting piece (13).

4. The dynamic adjustment mechanism of claim 2, wherein: the swing connecting structure comprises a fixed connecting pin (15) fixed on the presser foot connecting piece (13), one end of the swing plate (11) is provided with a sliding groove (11a), and the fixed connecting pin (15) is arranged in the sliding groove (11a) and can slide along the sliding groove (11 a).

5. The dynamic adjustment mechanism of any one of claims 2 to 4, wherein: still including rotationally installing rotation installation axle (7) in casing (17), rotation installation axle (7) and rotary rod (6) coaxial fixation, wire hook pendulum rod (8) one end cup joints on rotation installation axle (7), and is fixed in rotation installation axle (7) circumference.

6. The dynamic adjustment mechanism of claim 5, wherein: the rotating installation shaft (7) is in threaded connection with the rotating rod (6).

7. The dynamic adjustment mechanism of claim 1, wherein: the presser foot connecting piece (13) is provided with a vertical strip-shaped groove (13a), the presser foot connecting piece (13) is connected with the lifting presser foot through a fixing bolt, and the fixing bolt penetrates through the vertical strip-shaped groove (13 a).

8. The dynamic adjustment mechanism of claim 1, wherein: the rotating angle range of the rotating rod (6) is 40 degrees.