CN216074299U

CN216074299U - Curved needle frame structure of chain stitch sewing machine

Info

Publication number: CN216074299U
Application number: CN202122293645.7U
Authority: CN
Inventors: 王帅; 王越; 王守刚
Original assignee: Qingxian Beifeng Machinery Manufacturing Co ltd
Current assignee: Qingxian Beifeng Machinery Manufacturing Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-03-18
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses a looper frame structure of a chain stitch sewing machine, which comprises a looper shaking root shaft, a looper upper frame and a looper lower frame, wherein the looper upper frame is sleeved on the looper shaking root shaft, the outer surface of the looper shaking root shaft and the front side of the looper upper frame are fixedly connected with a looper upper frame check ring through check ring fixing screws, the upper surface of the looper upper frame is provided with a looper mounting hole, a looper is arranged in the looper mounting hole, the front surface of the looper upper frame and the position of the top of the looper upper frame are provided with a first threaded hole, and the inner thread of the first threaded hole is connected with a looper fixing screw. According to the utility model, the bent needle upper frame check ring is adopted to limit the axial movement of the bent needle upper frame, so that the inner ring of the bent needle upper frame and the bent needle shaking root shaft (the optical axis part is attached) can freely rotate.

Description

Curved needle frame structure of chain stitch sewing machine

Technical Field

The utility model relates to the technical field of a curved needle frame structure of a sewing machine, in particular to a curved needle frame structure of a chain stitch sewing machine.

Background

The sewing machine can sew fabrics such as plastics, cotton, hemp, silk, wool, rayon and the like and products such as leather, plastics, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, have high sewing speed and simple and convenient use, and are one of important tools in the modern textile industry.

The existing sewing needle bending frame is connected with an upper frame structure by utilizing two groups of bearings, and the bearings are easy to damage when in use and need to be periodically maintained.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a looper frame structure of a chain stitch sewing machine.

In order to achieve the purpose, the utility model adopts the following technical scheme: a looper frame structure of a chain stitch sewing machine comprises a looper shaking root shaft, a looper upper frame and a looper lower frame, wherein the looper upper frame is sleeved on the looper shaking root shaft, the outer surface of the looper shaking root shaft and the front side of the looper upper frame are fixedly connected with a looper upper frame check ring through check ring fixing screws, a looper mounting hole is formed in the upper surface of the looper upper frame, a looper is arranged inside the looper mounting hole, a first threaded hole is formed in the front surface of the looper upper frame and the position of the front surface of the looper upper frame, the position of the front surface of the looper upper frame is located at the top of the looper upper frame, and a looper fixing screw is in threaded connection with the inner portion of the first threaded hole;

the utility model discloses a looper, including looper lower frame, looper upper frame, looper lower frame, the outer surface of looper lower frame is provided with first lug, second lug, the inside looper of having seted up of first lug rocks the radical axle mounting hole, radical axle set screw and looper lower frame through the looper, the outer surface of looper lower frame just is located the rear side threaded connection of looper upper frame and looper lower frame has lock nut.

As a further description of the above technical solution:

the inner part of the curved needle lower frame is provided with a jack, a curved needle frame shaft is arranged in the jack, and the curved needle frame shaft is fixedly connected with the curved needle lower frame through a curved needle lower frame fastening screw and a second threaded hole.

As a further description of the above technical solution:

the number of the retaining ring fixing screws is multiple, and the retaining rings are distributed on the curved needle upper frame retaining ring in an annular array.

As a further description of the above technical solution:

the number of the first threaded holes is two, and the first threaded holes are distributed along the axial direction of the curved needle mounting hole.

As a further description of the above technical solution:

and a shaking connecting hole is formed in the front surface of the curved needle upper frame and is positioned below the first threaded hole.

As a further description of the above technical solution:

the curved needle is L-shaped, and the bottom of the curved needle is a cylinder.

As a further description of the above technical solution:

the second lug is formed by two half blocks, and the root shaft positioning screw is positioned below the first lug.

The utility model has the following beneficial effects:

1. compared with the prior art, the looper frame structure of the chain stitch sewing machine limits the axial movement of the looper upper frame by adopting the looper upper frame check ring, so that the inner ring of the looper upper frame and the looper can rotate freely between shaking root shafts (laminating the optical axis parts), and compared with the existing bearing structure, the structure has higher practicability and reduces the failure rate of the machine.

2. Compared with the prior art, the looper mounting check ring is installed by the check ring fixing screws, so that the looper mounting check ring is of a detachable structure, installation and later maintenance are facilitated, and the use is more convenient.

3. Compared with the prior art, the looper frame structure of the chain stitch sewing machine optimizes the mounting structure, adopts the looper lower frame fastening screw and the looper lower frame, can extrude the looper lower frame fastening screw through the bolt structure to fix the looper lower frame fastening screw with the shaft, and is more convenient to mount

Drawings

FIG. 1 is a schematic view of a curved needle bed structure of a chain stitch sewing machine according to the present invention;

FIG. 2 is an exploded view of the structure L of FIG. 1 according to the present invention;

FIG. 3 is a side view of the L structure of FIG. 1 according to the present invention;

FIG. 4 is a front view of the L-shaped structure of FIG. 1 according to the present invention;

fig. 5 is a top view of the L-shaped structure of fig. 1 according to the present invention.

Illustration of the drawings:

1. putting the curved needle on a frame; 2. mounting a retainer ring on the curved needle; 3. the retainer ring fixes the screw; 4. fixing screws by curved pins; 5. bending a needle; 6. the bent needle shakes the root shaft; 7. shaking the connecting hole; 8. a looper mounting hole; 9. setting a curved needle; 10. a curved needle lower frame fastening screw; 11. a bent needle frame shaft; 12. the bent needle shakes the root shaft mounting hole; 13. a locknut; 14. and a root shaft positioning screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention provides a looper frame structure of a chain stitch sewing machine: the bending needle rocking device comprises a bending needle rocking root shaft 6, a bending needle upper frame 1 and a bending needle lower frame 9, wherein the bending needle upper frame 1 is sleeved on the bending needle rocking root shaft 6, the outer surface of the bending needle rocking root shaft 6 is positioned at the front side of the bending needle upper frame 1 and is fixedly connected with a bending needle upper frame check ring 2 through a check ring fixing screw 3, a plurality of check ring fixing screws 3 are arranged and are distributed on the bending needle upper frame check ring 2 in an annular array manner, the firmness of the installation of the bending needle upper frame check ring 2 is improved conveniently, a bending needle installation hole 8 is formed in the upper surface of the bending needle upper frame 1, a bending needle 5 is arranged inside the bending needle installation hole 8, the bending needle 5 is L-shaped, the bottom of the bending needle 5 is cylindrical, the bending needle 5 is conveniently inserted into the bending needle installation hole 8, a first threaded hole is formed in the position, which is positioned at the top, of the front surface of the bending needle upper frame 1, two first threaded holes are arranged and are axially distributed along the bending needle installation hole 8, the inner thread of the first threaded hole is connected with a curved needle fixing screw 4, the first threaded hole is communicated with a curved needle mounting hole 8, and when the curved needle fixing screw 4 is screwed into the first threaded hole, the curved needle 5 is fixed, the curved needle shaking root shaft 6 and the curved needle upper frame 1 are not connected by adopting a traditional bearing structure in the structural design, so that the condition that a bearing in the existing structure is easy to damage is avoided, meanwhile, the curved needle upper frame 1 only can be worn with the curved needle shaking root shaft 6 and the curved needle upper frame retainer ring 2 during operation, and the maintenance cost is greatly improved;

a first lug and a second lug are arranged below the curved needle lower frame 9, the second lug is composed of two half blocks, the fastening screw 9 of the curved needle lower frame is convenient to extrude the jack, the diameter of the jack is reduced, and press from both sides the looper frame axle 11 and press from both sides tightly fixedly, looper rocks radical axle mounting hole 12 has been seted up to first lug inside, it rocks radical axle mounting hole 12 to be convenient for looper undercarriage 9 cover on looper rocks radical axle 6, the second lug is inside to have seted up the second screw hole, looper rocks radical axle 6 and rocks radical axle mounting hole 12 through the looper, radical axle set screw 14 is connected with looper undercarriage 9, radical axle set screw 14 is located the below of first lug, the outer surface that the looper rocked radical axle 6 just is located fixedly connected with dog between looper upper ledge 1 and looper undercarriage 9, the outer surface that the looper rocked radical axle 6 just is located the rear side of looper undercarriage 9 and is opened threaded connection and has lock nut 13 for install looper undercarriage 9 on looper rocks radical axle 6.

The jack has been seted up to looper undercarriage 9's inside, mainly used installation presss from both sides tight looper frame axle 11, the inside of looper undercarriage 9 and the below that is located the jack have seted up the gap, extrude through looper undercarriage fastening screw 9, make the gap shorten (the diameter of jack diminishes), the purpose of the tight looper frame axle 11 of realization clamp, the inside looper frame axle 11 that is provided with of jack, and looper frame axle 11 passes through looper undercarriage fastening screw 10, second screw hole and looper undercarriage 9 fixed connection, the front surface of looper upper ledge 1 just is located the below of first screw hole and has seted up and has shaken connecting hole 7, be used for connecting the looper connecting rod (the same with traditional sewing machine looper connecting rod structure).

The working principle is as follows: during installation, the upper looper frame 1 is sleeved on the looper shaking root shaft 6, then the upper looper frame check ring 2 is fixed on the looper shaking root shaft 6 through the check ring fixing screw 3, when the looper 5 is installed, a cylinder at the bottom of the looper 5 is inserted into the looper installing hole 8, then the fixing is carried out by using the looper fixing screw 4, when the lower looper frame 9 is installed, the lower looper frame 9 is sleeved on the looper shaking root shaft 6 through the looper shaking root shaft installing hole 12, then the installation and the fixation are carried out through the root shaft positioning screw 14 and the locknut 13, when the looper frame shaft 11 is installed, the looper frame shaft 11 is inserted into the jack, then the lower looper frame fastening screw 10 is screwed into the second threaded hole, so that the inner diameter of the jack is reduced, and the looper frame shaft 11 is clamped and fixed.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a chain stitch sewing machine looper frame structure, includes that the looper rocks radical axle (6), looper upper ledge (1) and looper lower ledge (9), its characterized in that: the curved needle upper frame (1) is sleeved on the curved needle shaking root shaft (6), a curved needle upper frame check ring (2) is fixedly connected to the outer surface of the curved needle shaking root shaft (6) and located on the front side of the curved needle upper frame (1) through a check ring fixing screw (3), a curved needle mounting hole (8) is formed in the upper surface of the curved needle upper frame (1), a curved needle (5) is arranged inside the curved needle mounting hole (8), a first threaded hole is formed in the front surface of the curved needle upper frame (1) and located at the top of the front surface of the curved needle upper frame, and a curved needle fixing screw (4) is in threaded connection with the inside of the first threaded hole;

the utility model discloses a looper, including looper undercarriage (9), the below of looper undercarriage (9) is provided with first lug, second lug, the inside looper of having seted up of first lug waves radical axle mounting hole (12), the inside second screw hole of having seted up of second lug, the looper waves radical axle (6) and waves radical axle mounting hole (12), radical axle set screw (14) through the looper and is connected with looper undercarriage (9), the looper waves the surface of radical axle (6) and is located fixedly connected with dog between looper upper bracket (1) and looper undercarriage (9), the looper waves the surface of radical axle (6) and is located the rear side threaded connection of looper undercarriage (9) and has lock nut (13).

2. The looper frame structure of a chain stitch sewing machine according to claim 1, wherein: the inner part of the curved needle lower frame (9) is provided with a jack, a curved needle frame shaft (11) is arranged in the jack, and the curved needle frame shaft (11) is fixedly connected with the curved needle lower frame (9) through a curved needle lower frame fastening screw (10) and a second threaded hole.

3. The looper frame structure of a chain stitch sewing machine according to claim 1, wherein: the number of the retaining ring fixing screws (3) is multiple, and the retaining rings are distributed on the curved needle upper frame retaining ring (2) in an annular array.

4. The looper frame structure of a chain stitch sewing machine according to claim 1, wherein: the number of the first threaded holes is two, and the first threaded holes are distributed along the axial direction of the bent pin mounting hole (8).

5. The looper frame structure of a chain stitch sewing machine according to claim 1, wherein: and a shaking connecting hole (7) is formed in the front surface of the curved needle upper frame (1) and below the first threaded hole.

6. The looper frame structure of a chain stitch sewing machine according to claim 1, wherein: the curved needle (5) is L-shaped, and the bottom of the curved needle (5) is a cylinder.

7. The looper frame structure of a chain stitch sewing machine according to claim 2, wherein: the second bump is composed of two half blocks, and the root shaft positioning screw (14) is located below the first bump.