CN215668481U - Control thread releasing mechanism of single-step-feed sewing machine - Google Patents
Control thread releasing mechanism of single-step-feed sewing machine Download PDFInfo
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- CN215668481U CN215668481U CN202121718858.3U CN202121718858U CN215668481U CN 215668481 U CN215668481 U CN 215668481U CN 202121718858 U CN202121718858 U CN 202121718858U CN 215668481 U CN215668481 U CN 215668481U
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- thread loosening
- loosening
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Abstract
The utility model relates to the technical field of sewing, in particular to a single-step sewing machine control thread loosening mechanism. The technical scheme includes that the stepping motor is connected with a synchronous belt and a presser foot lifting driving shaft through a synchronous wheel and can drive the presser foot lifting driving shaft to rotate, a thread loosening cam is fixedly arranged at one end of the presser foot lifting driving shaft, a needle pitch driving pin penetrates through a bottom plate lug, the other end of the presser foot lifting driving shaft is fixedly provided with a switcher seat, a thread loosening oscillating bar penetrates through the needle pitch driving pin and is positioned between the switcher seat and the bottom plate lug and is not connected with the needle pitch driving pin, the thread loosening cam and the thread loosening oscillating bar are installed in an aligned mode, a steel rope support is fixedly arranged on a machine shell, an axial screw penetrates through the thread loosening oscillating bar and can rotate around the thread loosening oscillating bar, and a thread loosening steel rope sequentially penetrates through an axial screw, the steel rope support, a thread loosening hinge and a steel rope adjusting sleeve. The utility model adopts a cam push rod transmission method, realizes the functions of adjusting the needle pitch, lifting the presser foot and trimming threads, and simultaneously realizes the thread straightening function, and is simple and convenient.
Description
Technical Field
The utility model relates to the technical field of sewing, in particular to a single-step sewing machine control thread loosening mechanism.
Background
A plurality of motion mechanisms are arranged in the sewing machine, and each mechanism realizes sewing through independent or matched motion.
The existing industrial sewing machine realizes the thread straightening function by adding a thread straightening electromagnet or a stepping motor on the traditional machine, or drives a thread straightening mechanism while cutting threads by other mechanical connection modes.
The novel single-step sewing machine can realize the integration of functions of trimming, lifting a presser foot and adjusting a needle pitch at present, and the function of thread straightening still needs to be realized by adopting an electromagnet or other driving mechanisms, so that the working efficiency of the sewing machine is improved, and the intelligent control of the sewing machine is realized; however, the use of both a stepper motor and an electromagnet for control increases the control difficulty and the internal space of the entire machine, making the machine look heavy and increasing cost.
At present, machines for realizing the functions of controlling thread trimming, presser foot lifting, needle gauge adjustment and thread loosening by using single stepping are not available in the market.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a single-step sewing machine control thread releasing mechanism, which is controlled by an independent stepping motor to realize the thread trimming and presser foot lifting and needle distance adjusting functions and simultaneously realize the thread releasing function.
In order to solve the problems in the prior art, the technical scheme of the utility model is as follows: the utility model provides a single step-in sewing machine control thread slackening mechanism, includes step motor, synchronizing wheel, hold-in range, lifts the presser foot drive shaft, step motor pass through synchronizing wheel and hold-in range and lift the one end of presser foot drive shaft and be connected, the drive lifts the presser foot drive shaft and rotates, its characterized in that: the thread releasing device also comprises a thread releasing cam, a thread releasing swing rod, a needle pitch driving pin, a shaft position screw, a thread releasing steel rope and a reset torsion spring;
the thread loosening cam is irregular, a through hole is formed in the center of the thread loosening cam, the circumference of the thread loosening cam is composed of an initial arc, a thread loosening arc, a termination arc and a transition arc respectively, the initial arc and the termination arc are concentric with the center hole, and the radius of the termination arc is larger than that of the initial arc;
the thread loosening swing rod is a prism, one end of the prism is provided with a driving swing arm and a thread loosening swing arm, and a round hole is formed in the center of the prism; a through hole is formed in the thread releasing swing arm;
the other end of the presser foot lifting driving shaft is fixedly connected with the thread loosening cam, and a driving swing arm of the thread loosening swing rod is tangentially arranged with an initial arc of the thread loosening cam and can rotate along the thread loosening cam; the round hole of the thread loosening swing rod is penetrated with a needle pitch driving pin and can rotate along the needle pitch driving pin, the shaft position screw is penetrated in a through hole of a thread loosening swing arm of the thread loosening swing rod and can rotate around the thread loosening swing rod, the shaft position screw is connected with one end of a thread loosening steel rope, the other end of the thread loosening steel rope sequentially penetrates through the steel rope support and the steel rope adjusting sleeve to be connected with the thread loosening hinge, and the thread loosening hinge is connected with the mounting seat through a reset torsion spring.
Further, the thread loosening swing rod is positioned between the switcher seat and the sewing machine bottom plate lug.
Furthermore, the thread releasing cam and the thread releasing swing rod are always aligned and abutted under the action of the reset torsion spring.
Compared with the prior art, the utility model has the following advantages:
1. the utility model adopts a cam push rod transmission method, realizes the functions of adjusting the needle pitch, lifting the presser foot and trimming threads, and simultaneously realizes the thread straightening function, and is simple and convenient.
2. The utility model controls the thread loosening function through the independent stepping motor, thereby greatly reducing the cost of the sewing machine.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the thread releasing mechanism of the present invention;
FIG. 3 is a schematic view of the cam portion of the present invention;
FIG. 4 is a schematic view of the thread releasing cam of the present invention;
FIG. 5 is a schematic view of the structure of the loose wire swing link according to the present invention.
FIG. 6 is a schematic view of the thread releasing mechanism of the present invention, wherein (a) is a schematic view of the cam position before thread releasing; (b) the position of a cam in a loose line is schematically shown; (c) a schematic diagram of cam position after thread release;
description of the labeling: 1-a stepping motor, 2-a synchronous wheel, 3-a synchronous belt, 4-a presser foot lifting driving shaft, 5-a thread releasing cam, 6-a thread releasing swing rod, 7-a needle pitch driving pin, 8-an axis screw, 9-a thread releasing steel rope, 10-a steel rope bracket, 11-a steel rope adjusting sleeve, 12-a thread releasing hinge, 13-a thread feeding nail, 14-a thread gripper, 15-a switcher seat and 16-a reset torsion spring;
5-1 starting circular arc, 5-2 loose line circular arc, 5-3 ending circular arc and 5-4 transition circular arc;
6-1 driving swing arm, 6-2 loosening swing arm.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
A single-step-feed sewing machine control thread releasing mechanism comprises a stepping motor 1, a synchronous wheel 2, a synchronous belt 3, a presser foot lifting drive shaft 4, a thread releasing cam 5, a thread releasing swing rod 6, a needle pitch drive pin 7, a shaft position screw 8, a thread releasing steel rope 9, a steel rope support 10, a steel rope adjusting sleeve 11, a thread releasing hinge 12, a thread releasing nail 13, a thread clamp 14, a switcher seat 15 and a reset torsion spring 16;
the loose thread cam 5 is irregular, a through hole is formed in the center of the loose thread cam, the circumference of the loose thread cam 5 is composed of an initial arc 5-1, a loose thread arc 5-2, a termination arc 5-3 and a transition arc 5-4, the initial arc 5-1 and the termination arc 5-3 are concentric with the center hole, and the radius of the termination arc 5-3 is larger than that of the initial arc 5-1;
the thread releasing swing rod 6 is a prism, one end of the prism is provided with a driving swing arm 6-1 and a thread releasing swing arm 6-2, and the center of the prism is provided with a round hole; a through hole is arranged on the loose thread swing arm 6-2;
the stepping motor 1 is connected with one end of a presser foot lifting drive shaft 4 through a synchronous wheel 2 and a synchronous belt 3 to drive the presser foot lifting drive shaft 4 to rotate, the other end of the presser foot lifting drive shaft 4 is fixedly connected with a thread loosening cam 5, and a starting circular arc 5-1 of the thread loosening cam 5 is arranged in a tangent mode with a drive swing arm 6-1 of a thread loosening swing rod 6; the axial position screw 8 penetrates through a through hole of the thread loosening swing arm 6-2 of the thread loosening swing rod 6 and can rotate around the thread loosening swing rod 6, the axial position screw 8 is connected with one end of a thread loosening steel rope 9, the other end of the thread loosening steel rope 9 sequentially penetrates through a steel rope support 10 and a steel rope adjusting sleeve 11 to be connected with a thread loosening hinge 12, the thread loosening hinge 12 is connected with a mounting seat through a reset torsion spring 16, the mounting seat is connected with a thread clamping device 14, a thread loosening nail 13 is connected to the thread clamping device 14, the thread loosening hinge 12 abuts against the mounting seat under the action of the reset torsion spring 16, and meanwhile the thread loosening steel rope 9 is driven to enable the thread loosening swing rod 6 to be tangent to the thread loosening cam 5.
The thread releasing swing rod 6 penetrates through the needle pitch driving pin 7, is positioned between the switcher seat 15 and the bottom plate lug and is not connected with the needle pitch driving pin 7.
The working process of the utility model is as follows:
when the sewing machine works, thread loosening action is needed to avoid thread end separation caused by high thread tension during thread cutting, and the thread loosening mechanism does not act under other sewing states.
Before the thread cutting action is carried out, when the sewing machine sews normally, the thread loosening swing rod 6 is positioned at the initial arc 5-1 part of the thread loosening cam 5 and is tangent with the initial arc, at the moment, the thread loosening mechanism does not loosen the thread, and the thread loosening steel rope does not move.
When the thread trimming is finished after sewing, the stepping motor 1 rotates to drive the thread trimming mechanism to trim threads, the other end of the shaft of the stepping motor 1 drives the presser foot lifting drive shaft 4 to rotate through the synchronous belt and the synchronous wheel to drive the thread loosening cam 5 to rotate simultaneously, the tangent point of the thread loosening cam 5 and the thread loosening swing rod 6 sequentially passes through the thread loosening arc 5-2 from the initial arc part 5-1 to the ending arc 5-3, and the thread loosening swing rod 6 rotates around the needle pitch drive pin 7 under the driving of the thread loosening cam 5 to pull the thread loosening steel rope 9, so that the thread straightening function is realized; after the thread is straightened, the thread loosening swing rod 6 returns to the position of the initial circular arc 5-1 under the action of the reset torsion spring 16.
The wire lifting amount of the wire lifting mechanism can be adjusted through the steel rope adjusting sleeve 11, the supporting screw on one side of the steel rope adjusting sleeve 11 is loosened, and the steel rope is adjusted in length and then is in supporting connection.
When the sewing machine carries out other actions such as presser foot lifting, stitch length adjustment and the like, the tangent point of the thread releasing cam 5 and the thread releasing swing rod 6 is always positioned at the position of the initial arc 5-1, so that the thread releasing mechanism is not influenced.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make various changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (3)
1. The utility model provides a single step-in sewing machine control thread slackening mechanism, includes step motor (1), synchronizing wheel (2), hold-in range (3), lifts presser foot drive shaft (4), step motor (1) through synchronizing wheel (2) and hold-in range (3) with lift the one end of presser foot drive shaft (4) and be connected, the drive lifts presser foot drive shaft (4) and rotates, its characterized in that: the thread releasing device also comprises a thread releasing cam (5), a thread releasing swing rod (6), a stitch length driving pin (7), an axial position screw (8), a thread releasing steel rope (9) and a reset torsion spring (16);
the thread loosening cam (5) is irregular, a through hole is formed in the center of the thread loosening cam, the circumference of the thread loosening cam (5) is composed of a starting circular arc (5-1), a thread loosening circular arc (5-2), an ending circular arc (5-3) and a transition circular arc (5-4), the starting circular arc (5-1) and the ending circular arc (5-3) are concentric with the center hole, and the radius of the ending circular arc (5-3) is larger than that of the starting circular arc (5-1);
the thread loosening swing rod (6) is a prism, one end of the prism is provided with a driving swing arm (6-1) and a thread loosening swing arm (6-2), and the center of the prism is provided with a round hole; a through hole is arranged on the loose thread swing arm (6-2);
the other end of the presser foot lifting driving shaft (4) is fixedly connected with the thread loosening cam (5), and a driving swing arm (6-1) of the thread loosening swing rod (6) and an initial arc (5-1) of the thread loosening cam (5) are arranged in a tangent mode and can rotate along the thread loosening cam (5); the needle pitch driving pin (7) penetrates through a round hole of the thread loosening swing rod (6) and can rotate along the needle pitch driving pin (7), the shaft position screw (8) penetrates through a through hole of the thread loosening swing arm (6-2) of the thread loosening swing rod (6) and can rotate around the thread loosening swing rod (6), the shaft position screw (8) is connected with one end of the thread loosening steel rope (9), the other end of the thread loosening steel rope (9) sequentially penetrates through the steel rope support (10) and the steel rope adjusting sleeve (11) to be connected with the thread loosening hinge (12), and the thread loosening hinge (12) is connected with the mounting seat through the reset torsion spring (16).
2. The single step sewing machine control thread releasing mechanism of claim 1, wherein: the thread loosening swing rod (6) is positioned between the switcher seat (15) and a bottom plate lug of the sewing machine.
3. A single step sewing machine control thread releasing mechanism according to claim 1 or 2, wherein: the thread releasing cam (5) and the thread releasing swing rod (6) are always aligned and abutted under the action of the reset torsion spring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121718858.3U CN215668481U (en) | 2021-07-27 | 2021-07-27 | Control thread releasing mechanism of single-step-feed sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121718858.3U CN215668481U (en) | 2021-07-27 | 2021-07-27 | Control thread releasing mechanism of single-step-feed sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215668481U true CN215668481U (en) | 2022-01-28 |
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ID=79981693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121718858.3U Active CN215668481U (en) | 2021-07-27 | 2021-07-27 | Control thread releasing mechanism of single-step-feed sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215668481U (en) |
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2021
- 2021-07-27 CN CN202121718858.3U patent/CN215668481U/en active Active
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