CN217869413U

CN217869413U - Thread trimming and presser foot lifting mechanism for flat seaming machine

Info

Publication number: CN217869413U
Application number: CN202222214903.2U
Authority: CN
Inventors: 蒋达淼; 周善足; 任恩林
Original assignee: Taizhou Supu Electromechanical Co ltd
Current assignee: Taizhou Supu Electromechanical Co ltd
Priority date: 2022-08-20
Filing date: 2022-08-20
Publication date: 2022-11-22
Anticipated expiration: 2032-08-20

Abstract

The utility model belongs to the technical field of the sewing machine, concretely relates to a thread trimming and lift presser foot mechanism for flat seaming machine, the side of organism is provided with vertical step motor, be provided with the pivot in the step motor, the upper end of pivot is installed and is used for the drive to lift the cam of presser foot mechanism one, it includes the rotatable presser foot axle that sets up in the organism to lift presser foot mechanism, the epaxial pendulum rod of installing of presser foot, the pendulum rod is connected with the impeller one that supplies cam one to promote, the cam two that is used for driving thread trimming mechanism is installed to the lower extreme of pivot, but thread trimming mechanism includes the thread trimming axle that linear motion set up on the organism, the periphery of thread trimming axle is provided with the drive block, the drive block is connected with link assembly, link assembly's the other end is provided with impeller two that supplies cam two to promote, the utility model provides a cam and two upper and lower both sides that do not lie in the motor of cam, make the structure succinct, easy dismounting.

Description

Thread trimming and presser foot lifting mechanism for flat seaming machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a thread trimming and presser foot lifting mechanism for a flat seaming machine.

Background

At present, in the sewing machine industry, more and more manufacturers adopt a stepping motor to drive a thread cutting mechanism and a presser foot lifting mechanism, the back or the bottom of the sewing machine is provided with the stepping motor, and the thread cutting mechanism, the thread loosening mechanism and the presser foot lifting mechanism are respectively controlled by the positive rotation and the negative rotation of the stepping motor.

For example, the chinese utility model, with patent No. CN201920042424.2, discloses a driving device for trimming and lifting presser feet on a sewing machine.

The sewing machine and the presser foot lifting cam and the thread trimming cam on the sewing machine are arranged on the same side of the motor, the problem of avoidance between each part for lifting the presser foot and each part for trimming needs to be emphasized in design besides consideration of staggering of action angles between the presser foot lifting cam and the thread trimming cam, and therefore the driving device for trimming and lifting the presser foot on the sewing machine has the problems of complex structure and high failure rate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a trimming and lift presser foot mechanism for flat seaming machine solves current structure complicacy, fault rate height.

The purpose of the utility model is realized like this: the utility model provides a trimming and lift presser foot mechanism for flat seaming machine, includes organism, trimming mechanism and lifts presser foot mechanism, and the side of organism is provided with vertical step motor, is provided with the pivot in the step motor, and the upper end of pivot is installed and is used for the drive to lift the cam I of presser foot mechanism, lifts presser foot mechanism and includes the rotatable presser foot axle that sets up in the organism, and the epaxial pendulum rod of installing of presser foot is connected with the impeller I that supplies the first promotion of cam, and the one end of impeller I is articulated with the pendulum rod, the other end shaping of impeller I has the bar hole to the cover is established in the periphery of pivot, the lower terminal surface of impeller I is provided with the rolling bearing I that supplies the first promotion of cam.

Preferably, an adjusting knob is mounted at the upper end of the rotating shaft, and the first pushing piece is located between the adjusting knob and the first cam.

Preferably, the lower end of the rotating shaft is provided with a second cam for driving the thread cutting mechanism, the thread cutting mechanism comprises a thread cutting shaft which can be linearly arranged on the machine body, a driving block is arranged on the periphery of the thread cutting shaft and connected with a connecting rod assembly, and the other end of the connecting rod assembly is provided with a second pushing piece for pushing the second cam.

Preferably, a mounting seat is arranged on the lower end face of the stepping motor, the trimming shaft is arranged in the mounting seat, the connecting rod assembly comprises a first connecting rod, one end of the first connecting rod is connected with the driving block, the other end of the first connecting rod is connected with a second connecting rod, the middle of the second connecting rod is rotatably arranged on the mounting seat, and the other end of the second connecting rod is provided with the second pushing piece.

Preferably, two sides of the lower end of the mounting seat are respectively formed with a limiting part, the driving block is located in the two limiting parts, a spring is arranged on the periphery of the shear line shaft, and the spring abuts between the limiting parts and the driving block.

Preferably, one end of the thread cutting shaft is connected with a cutter head connecting crank, a connecting pin shaft is mounted on the cutter head connecting crank, a connecting block is arranged on the periphery of the connecting pin shaft and connected with a square block through a connecting rod, a rotatable scissors mounting plate is arranged on the upper end face of the square block, and the other end of the thread cutting shaft is connected with a thread releasing mechanism.

Preferably, the upper end face of the stepping motor is provided with a first mounting bracket, and the lower end face of the stepping motor is provided with a second mounting bracket.

Compared with the prior art, the utility model has the advantages that:

the utility model discloses in the actual work process, step motor operation can drive the presser foot axle through cam one of pivot upper end and rotate to the execution lifts the presser foot action, perhaps can drive the trimming axle through cam two of pivot lower extreme and rotate, thereby carries out trimming action or pine line action, and cam one and cam two are located the upper and lower both sides of motor respectively, make the structure succinct, easy dismounting.

Drawings

Fig. 1 is a schematic structural diagram of a machine body.

Fig. 2 is a schematic structural diagram of the motor, the thread trimming mechanism and the presser foot lifting mechanism.

Fig. 3 is a schematic structural diagram of the thread trimming mechanism and the presser foot lifting mechanism.

Fig. 4 is a schematic structural view of the presser foot lifting mechanism.

Reference numerals: 1-organism; 2-a thread trimming mechanism; 3-lifting the presser foot mechanism; 4-a step motor; 5-a rotating shaft; 6, a first cam; 7-presser foot shaft; 8-oscillating bar; 9-a pusher one; 10-cam two; 11-a shear spool; 12-a drive block; 13-a linkage assembly; 14-pusher member two; 15-strip shaped holes; 16-a rotating bearing one; 17-adjusting knob; 18-a mounting seat; 19-connecting rod one; 20-link two; 21-a limiting part; 22-a spring; 23-mounting a first bracket; 24-mounting a second bracket; 25-the cutter head is connected with a crank; 26-connecting a pin shaft; 27-connecting blocks; 28-a connecting rod; 29-square block; 30-a scissors mounting plate; 31-thread releasing mechanism.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, a thread trimming and presser foot lifting mechanism for a flat seaming machine comprises a machine body 1, wherein a thread trimming mechanism 2, a presser foot lifting mechanism 3 and a thread loosening mechanism 31 are respectively arranged in the machine body 1, a vertical stepping motor 4 is arranged on the side surface of the machine body 1, the stepping motor 4 is vertically arranged to reduce the occupied space, and a rotating shaft 5 is arranged in the stepping motor 4;

the upper end of the rotating shaft 5 is provided with a first cam 6 for driving the presser foot lifting mechanism 3, the presser foot lifting mechanism 3 comprises a presser foot shaft 7 which is rotatably arranged in the machine body 1, the presser foot shaft 7 is provided with a swing rod 8, and the swing rod 8 is connected with a first pushing piece 9 for pushing the first cam 6;

the lower end of the rotating shaft 5 is provided with a second cam 10 for driving the wire cutting mechanism 2, the wire cutting mechanism 2 comprises a wire cutting shaft 11 which can be linearly arranged on the machine body 1, the periphery of the wire cutting shaft 11 is provided with a driving block 12, the driving block 12 is connected with a connecting rod assembly 13, and the other end of the connecting rod assembly 13 is provided with a second pushing piece 14 for pushing the second cam 10.

In the actual working process, the stepping motor 4 runs, the first cam 6 at the upper end of the rotating shaft 5 can drive the presser foot shaft 7 to rotate, so that the presser foot lifting action is executed, or the second cam 10 at the lower end of the rotating shaft 5 can drive the thread trimming shaft 11 to rotate, so that the thread trimming action or the thread loosening action is executed, and the first cam and the second cam are respectively positioned at the upper side and the lower side of the motor, so that the structure is simple, and the dismounting is convenient.

One end of the first pushing piece 9 is hinged to the swing rod 8, a strip-shaped hole 15 is formed in the other end of the first pushing piece 9, the first pushing piece 9 is movably sleeved on the periphery of the rotating shaft 5 through the strip-shaped hole 15, so that displacement of the first pushing piece 15 can be limited and kept moving linearly, the first pushing piece 9 is formed by slotting the middle of the first pushing piece 9 and provided with the strip-shaped hole 15, a movable joint screw is connected between the first pushing piece 9 and the swing rod 8, when the first cam 6 pushes a first rotating bearing 16 on the first pushing piece 9, the first pushing piece 9 is limited by an electric motor shaft along the strip-shaped hole 15 and is pushed in a set direction, the structure is simple, ingenious and good in stability, and the lower end face of the first pushing piece 9 is provided with a first rotating bearing 16 for the first cam 6 to push, so that resistance is reduced and pushing is smoother.

An adjusting knob 17 is installed at the upper end of the rotating shaft 5, the actions of the thread trimming and presser foot lifting mechanisms can be controlled by manually rotating the adjusting knob 17, the operation is convenient, the actions of the presser foot lifting and thread trimming can be controlled when no electricity exists, the mechanical problem is safely treated under the condition of no electricity insertion, and the pushing piece I9 is located between the adjusting knob 17 and the cam I6.

The lower end face of the stepping motor 4 is provided with a mounting seat 18, the thread cutting shaft 11 is arranged in the mounting seat 18, two ends of the thread cutting shaft 11 are respectively arranged in the mounting seat 18 through shaft sleeves, so that linear movement is achieved, the connecting rod assembly 13 comprises a first connecting rod 19, one end of the first connecting rod 19 is connected with the driving block 12, the other end of the first connecting rod 19 is connected with a second connecting rod 20, the middle of the second connecting rod 20 is rotatably arranged on the mounting seat 18, the other end of the second connecting rod 20 is provided with a second pushing piece 14, and when the second cam 10 pushes the second pushing piece 14, the thread cutting shaft 11 is driven to move through the second connecting rod 20 and the first connecting rod 19.

Limiting parts 21 are respectively formed on two sides of the lower end of the mounting seat 18, the driving block 12 is located in the two limiting parts 21 so as to limit the position of the driving block 12, a spring 22 is arranged on the periphery of the shear spool 11 to realize automatic return, and the spring 22 is abutted between the limiting parts 21 and the driving block 12.

The upper end face of the stepping motor 4 is provided with a first mounting bracket 23, and the lower end face of the stepping motor 4 is provided with a second mounting bracket 24, so that the stepping motor 4 can be fixed on the machine body through a fastener.

One end of the thread cutting shaft 11 is connected with a cutter connecting crank 25, a connecting pin shaft 26 is mounted on the cutter connecting crank 25, a connecting block 27 is arranged on the periphery of the connecting pin shaft 26, the connecting block 27 is connected with a square 29 through a connecting rod 28, a rotatable scissors mounting plate 30 is arranged on the upper end face of the square 29, and the other end of the thread cutting shaft 11 is connected with a thread releasing mechanism 31.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The thread trimming and presser foot lifting mechanism for the flat seaming machine is characterized by comprising a machine body (1), a thread trimming mechanism (2) and a presser foot lifting mechanism (3), wherein a vertical stepping motor (4) is arranged on the side face of the machine body (1), a rotating shaft (5) is arranged in the stepping motor (4), a first cam (6) used for driving the presser foot lifting mechanism (3) is installed at the upper end of the rotating shaft (5), the presser foot lifting mechanism (3) comprises a presser foot shaft (7) which is rotatably arranged in the machine body (1), a swinging rod (8) is installed on the presser foot shaft (7), the swinging rod (8) is connected with a first pushing piece (9) for pushing the first cam (6), one end of the first pushing piece (9) is hinged to the swinging rod (8), a strip-shaped hole (15) is formed in the other end of the first pushing piece (9) and is movably sleeved on the periphery of the rotating shaft (5), and a first rotating bearing (16) for pushing the first cam (6) is arranged on the lower end face of the first pushing piece (9).

2. The thread trimming and presser foot lifting mechanism for a flat seaming machine as claimed in claim 1, wherein: an adjusting knob (17) is installed at the upper end of the rotating shaft (5), and the pushing piece I (9) is located between the adjusting knob (17) and the cam I (6).

3. The thread trimming and presser foot lifting mechanism for a flat seaming machine according to claim 1 or 2, wherein: the lower end of the rotating shaft (5) is provided with a second cam (10) used for driving the wire cutting mechanism (2), the wire cutting mechanism (2) comprises a wire cutting shaft (11) which can be linearly arranged on the machine body (1), a driving block (12) is arranged on the periphery of the wire cutting shaft (11), the driving block (12) is connected with a connecting rod assembly (13), and the other end of the connecting rod assembly (13) is provided with a second pushing piece (14) for the second cam (10) to push.

4. The thread trimming and presser foot lifting mechanism for a flat seaming machine as claimed in claim 3, wherein: the lower end face of the stepping motor (4) is provided with a mounting seat (18), the thread cutting shaft (11) is arranged in the mounting seat (18), the connecting rod assembly (13) comprises a first connecting rod (19), one end of the first connecting rod (19) is connected with the driving block (12), the other end of the first connecting rod (19) is connected with a second connecting rod (20), the middle of the second connecting rod (20) is rotatably arranged on the mounting seat (18), and the other end of the second connecting rod (20) is provided with a second pushing piece (14).

5. The thread trimming and presser foot lifting mechanism for a flat seaming machine as claimed in claim 4, wherein: limiting parts (21) are respectively formed on two sides of the lower end of the mounting seat (18), the driving block (12) is located in the two limiting parts (21), a spring (22) is arranged on the periphery of the shear line shaft (11), and the spring (22) abuts between the limiting parts (21) and the driving block (12).

6. The thread trimming and presser foot lifting mechanism for a flat seaming machine as claimed in claim 3, wherein: the utility model discloses a scissors, including cut spool (11), the one end is connected with the blade disc and connects crank (25), installs connecting pin axle (26) on blade disc connecting crank (25), and the periphery of connecting pin axle (26) is provided with connecting block (27), and connecting block (27) are connected with square (29) through connecting rod (28), and the up end of square (29) is provided with rotatable scissors mounting panel (30), the other end of cut spool (11) is connected with thread slackening mechanism (31).

7. The thread trimming and presser foot lifting mechanism for a flat seaming machine as claimed in claim 1, wherein: the upper end face of the stepping motor (4) is provided with a first mounting bracket (23), and the lower end face of the stepping motor (4) is provided with a second mounting bracket (24).