CN218540041U

CN218540041U - Single cam thread trimming and presser foot lifting driving mechanism of overedger

Info

Publication number: CN218540041U
Application number: CN202121278915.0U
Authority: CN
Inventors: 蒋达淼; 任恩林; 杨开胜
Original assignee: Zhejiang Qishi Electromechanical Technology Co ltd
Current assignee: Zhejiang Qishi Electromechanical Technology Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2023-02-28
Anticipated expiration: 2031-06-08

Abstract

The utility model belongs to the technical field of sewing machines, in particular to a single-cam thread trimming and presser foot lifting driving mechanism of an overlock machine, which comprises a shell, wherein a motor is transversely arranged on one side of the shell; a driving wheel arranged on the output shaft of the motor and rotating along with the output shaft; the pressure foot lifting connecting rod assembly is arranged on one side of the driving wheel, and a driving part for driving the pressure foot lifting connecting rod assembly is formed on the periphery of the driving wheel; trimming link assembly sets up in one side of drive wheel, and the periphery shaping of drive wheel has the drive curved surface, is provided with the drive pin axle that drives trimming link assembly in certain stroke in the drive curved surface, and drive pin axle is connected with trimming link assembly, the utility model discloses a design of drive wheel realizes that a motor can control respectively and lifts presser foot subassembly and trimming assembly action, accomplishes two actions, simple structure, reduction equipment cost, convenient and practical to through the setting of isolating construction, make lift the pressure can simultaneous working with the trimming, convenient to use.

Description

Single cam thread trimming and presser foot lifting driving mechanism of overedger

Technical Field

The utility model relates to a sewing machine technical field refers in particular to a single cam thread trimming and presser foot lifting driving mechanism of overedger.

Background

Along with the continuous improvement of sewing machine degree of automation, sewing machine generally possesses automatic thread trimming mechanism and lifts the presser foot mechanism with automatic, realizes respectively that the action of automatic presser foot and automatic thread trimming is lifted to save time, reduce the labour, improve work efficiency.

For example, the invention is a chinese utility patent with application No. CN109537194A, which discloses a sewing machine and an automatic presser foot lifting and trimming control method.

Although the device can realize automatic trimming or presser foot lifting action through the rotation of the motor, the trimming and presser foot lifting mechanisms cannot work simultaneously, and only the trimming or presser foot lifting mechanisms can be controlled independently in one period.

Therefore, the structure of the existing overlock sewing machine needs to be further improved.

Disclosure of Invention

The utility model aims at providing a hemming machine's single cam trimming and lift presser foot actuating mechanism through the drive wheel, solves the complicated problem of current actuating mechanism structure.

The purpose of the utility model is realized like this: a single cam thread trimming and presser foot lifting driving mechanism of a overedger comprises

A motor is transversely arranged on one side of the shell;

a driving wheel arranged on the output shaft of the motor and rotating along with the output shaft;

the pressure foot lifting connecting rod assembly is arranged on one side of the driving wheel and used for executing the pressure foot lifting action, a driving part for driving the pressure foot lifting connecting rod assembly is formed on the periphery of the driving wheel, and the driving wheel rotates to enable the driving part to drive the pressure foot lifting connecting rod assembly to act and execute the pressure foot lifting action;

the trimming connecting rod assembly is arranged on one side of the driving wheel and used for executing trimming actions, a driving curved surface is formed on one side of the driving wheel, a driving pin shaft for driving the trimming connecting rod assembly in a certain stroke is arranged in the driving curved surface, the driving pin shaft is connected with the trimming connecting rod assembly, the driving curved surface comprises a first idle stroke surface, a second idle stroke surface and a trimming driving curved surface, the trimming driving curved surface is arranged between the first idle stroke surface and the second idle stroke surface, the driving wheel rotates, and the trimming actions are executed when the driving pin shaft passes through the trimming driving curved surface.

Preferably, the rotation area of the driving wheel can be divided into a first adjusting area and a second adjusting area; the first regulating area and the second regulating area form a continuous circular area;

when the driving pin shaft is positioned at the position of the trimming line to drive the curved surface to move, the driving pin shaft is recorded as a first adjusting area

The first adjusting area corresponds to the electric control thread cutting of the sewing machine;

when the rotating wheel is in the movement of the driving part, the rotating wheel is marked as a second adjusting area, and the second adjusting area corresponds to an electric control pressure lifting foot of the sewing machine;

the thread cutting assembly is located at a position where the sewing thread is cut off by the electric control, and the driving pin shaft is located in the range of the first adjusting area;

when the presser foot lifting assembly is in an electric control state for lifting or putting down the presser foot, the rotating wheel is positioned in the range of the second adjusting area;

when the presser foot lifting component is in the position for electrically controlling to lift the presser foot and simultaneously the thread cutting component is in the position for cutting the sewing thread, the rotating wheel and the driving pin shaft are positioned in the common area between the first adjusting area and the second adjusting area;

when the presser foot lifting assembly is used for placing the presser foot, and simultaneously when the thread cutting assembly is used for cutting off the sewing thread, the rotating wheel and the driving pin shaft are positioned in a common area between the first adjusting area and the second adjusting area;

when the electric control pressure lifting pin assembly is not operated, the foot control pressure lifting pin assembly can be used for operating the pressure lifting pin assembly.

Preferably, the periphery of the rotating shaft is provided with a driving block, the middle lever is provided with an arc-shaped groove, one end of the driving block is molded with a push block, and the push block is arranged in the arc-shaped groove.

Preferably, a rotatable foot-controlled lifting and pressing lever is arranged on the machine shell, one end of the foot-controlled lifting and pressing lever is connected with the lower end of the middle lever through a connecting rod, and the other end of the foot-controlled lifting and pressing lever is connected with a foot-controlled lifting and pressing assembly.

Preferably, a pushing part is formed at the upper end of the middle lever, and a rotatable rotating wheel is mounted on the pushing part.

Preferably, a reset torsion spring is arranged between the lower end of the middle lever and the machine shell.

Preferably, the trimming connecting rod component comprises a long rocker arm, the upper end of the long rocker arm is provided with the driving pin shaft, the middle part of the long rocker arm is hinged with a rocker arm fixing plate, the other end of the rocker arm fixing plate is connected with the machine shell, the lower end of the long rocker arm is hinged with a short rocker arm, and the other end of the short rocker arm is connected with the trimming component.

Preferably, the driving curved surface comprises a first idle stroke surface for enabling the thread trimming assembly to rotate clockwise and a second idle stroke surface for enabling the thread trimming assembly to rotate anticlockwise, and a thread trimming driving curved surface is arranged between the first idle stroke surface and the second idle stroke surface.

Preferably, the end of the driving pin shaft is spherical; the driving part is arranged on the periphery of the driving wheel in a protruding mode.

Preferably, a plane bearing is arranged between the driving wheel and the end face of the motor, and a limiting block is installed at the outer end of the driving wheel.

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

the utility model discloses a design of drive wheel realizes that a motor can control respectively and lifts presser foot subassembly and trimming subassembly action, accomplishes two actions, simple structure, reduction of equipment cost, convenient and practical to when the execution lifts the presser foot action, can also carry out the trimming action, convenient to use.

Drawings

FIG. 1 is a first structural schematic diagram of an overlock sewing machine.

Fig. 2 is a first schematic structural diagram of the present invention.

Fig. 3 is a first structural schematic diagram of the driving wheel, the presser foot lifting connecting rod assembly and the thread trimming connecting rod assembly.

Fig. 4 is a first structural schematic diagram of the driving wheel, the middle lever and the long rocker arm.

Fig. 5 is a schematic structural diagram of a overedger.

Fig. 6 is a schematic structural diagram of the present invention.

Fig. 7 is a second structural schematic diagram of the driving wheel, the presser foot lifting connecting rod assembly and the thread trimming connecting rod assembly.

Fig. 8 is a schematic structural diagram II of the driving wheel, the middle lever and the long rocker arm.

Fig. 9 is a schematic view of a rotation region division structure of the driving wheel.

Fig. 10 is a schematic structural view of the driving portion.

Fig. 11 is a schematic structural view of the driving curved surface.

Reference numerals are as follows: 1-a machine shell; 2, a motor; 3-a reset torsion spring; 4-lifting the presser foot assembly; 5-a thread trimming assembly; 6-lifting and pressing the lever by foot control; 7-a pull rod; 8-plane bearings; 9-a limiting block; 10-driving wheels; 11-a drive section; 12-a driving surface; 13-a spring; 20-lifting the presser foot link assembly; 21-a rotating shaft; 22-intermediate lever; 23-a drive block; 30-a trimming link assembly; 31-a drive pin; 32-long rocker arm; 33-rocker arm fixing plate; 34-short rocker arm; 121-idle stroke face one; 122-idle stroke face two; 123-trimming a driving curved surface;

221-an arc-shaped groove; 222-a pushing portion; 223-a rotating wheel; 231-a push block; a1-a first regulatory region;

a2-second regulatory region.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the attached drawings.

With reference to fig. 1 and 2 or fig. 5 and 6, a single cam thread trimming and presser foot lifting driving mechanism of overedger comprises

The motor comprises a machine shell 1, wherein a motor 2 is transversely arranged on one side of the machine shell 1;

a driving wheel 10 provided on an output shaft of the motor 2 and rotated therewith;

a foot lifting connecting rod assembly 20 which is arranged at one side of the driving wheel 10 and is used for executing the foot lifting action, a driving part 11 is formed at the periphery of the driving wheel 10, when the driving wheel 10 rotates to a certain stroke, the driving part 11 drives the foot lifting connecting rod assembly 20 to act, and the foot lifting connecting rod assembly 20 is driven by the driving part 11 to act, so that the foot lifting action is executed;

the trimming connecting rod assembly 30 is arranged on one side of the driving wheel 10 and used for performing trimming actions, a driving curved surface 12 is formed on one side of the driving wheel 10, a driving pin 31 for driving the trimming connecting rod assembly 30 within a certain stroke is arranged in the driving curved surface 12, the driving curved surface 12 comprises a first idle stroke surface 121 and a second idle stroke surface 122, the driving wheel 10 rotates, the driving pin 31 is connected with the trimming connecting rod assembly 30, when the driving wheel 10 rotates to a certain stroke, namely the driving pin 31 moves from the second idle stroke surface 122 to the first idle stroke surface 121, or when the driving pin 31 moves from the first idle stroke surface 121 to the second idle stroke surface 122 and passes through the trimming driving curved surface 123, the trimming connecting rod assembly 30 is driven to act through the driving pin 31, and therefore the trimming actions are performed.

The utility model discloses a design of drive wheel 10, drive wheel 10 can 360 clockwise or anticlockwise rotations, carry out synchronous or asynchronous trimming respectively and lift presser foot work, and a motor 2 can control respectively and lift

presser foot subassembly

4 and 5 actions of trimming subassembly, accomplishes two actions, simple structure, reduction equipment cost, convenient and practical to when the execution lifts the presser foot action, can also carry out the trimming action, convenient to use.

The rotation area of the driving wheel 10 can be divided into a first adjusting area A1 and a second adjusting area A2; the first regulating area A1 and the second regulating area A2 form a continuous circular area;

when the driving pin 31 moves on the curved surface 123, the driving pin is marked as a first adjusting area A1, and the first adjusting area A1 corresponds to the electric control trimming of the sewing machine;

when the rotating wheel 223 is in the movement of the driving part 11, the electric control pressure lifting foot is lifted or the rotating wheel 223 leaves the movement of the driving part 11, the electric control pressure lifting foot is put down, and the electric control pressure lifting foot is marked as a second adjusting area A2 at the moment;

the thread cutting assembly 5 is positioned at the position of electrically cutting off sewing threads, and the driving pin 31 is positioned in the range of the first adjusting area A1;

when the presser foot lifting assembly 4 is in an electric control presser foot lifting or putting down state, the rotating wheel 223 is positioned in the range of the second adjusting area A2;

when the presser foot lifting component 4 is in an electric control presser foot lifting state and the thread cutting component 5 is in a position for cutting sewing threads, the rotating wheel 223 and the driving pin 31 are positioned in a common area between the first adjusting area A1 and the second adjusting area A2;

when the presser foot lifting assembly 4 is used for lowering the presser foot and the thread cutting assembly 5 is used for cutting off the sewing thread, the rotating wheel 223 and the driving pin 31 are positioned in the common area between the first adjusting area A1 and the second adjusting area A2;

when the electric control pressure raising and pressing foot component 4 is not executed, the foot control pressure raising and pressing component can execute the action of the pressure raising and pressing foot component 4.

The motor in the utility model can independently control the action of the thread trimming component 5, has simple structure, reduces equipment cost, is convenient and practical, can carry out thread trimming action through electric control when the presser foot is lifted and is not acted, and can carry out thread trimming action through electric control when the motor is controlled to carry out the presser foot lifting action, or can control the action of the thread trimming mechanism through a manual button to carry out manual thread trimming, the motor is a closed loop zone origin stepping motor, the absolute origin position of the encoder is automatically searched when the machine is started,

because the utility model discloses a lift presser foot link assembly 20 and drive wheel 10 are the structure setting of separation, consequently when not carrying out the automatically controlled action of lifting presser foot subassembly 4, lift the executable action of lifting presser foot subassembly 4 of pressing the subassembly through the foot control.

With reference to fig. 2 and 3 or fig. 6 and 7, a specific structure of the pressure raising and pressing foot link assembly 20 is further described, where the pressure raising and pressing foot link assembly 20 includes a rotating shaft 21 rotatably disposed in the housing 1, an intermediate lever 22 is mounted at one end of the rotating shaft 21, an upper end of the intermediate lever 22 is located at one side of the driving portion 11, the driving portion 11 is disposed in a protruding manner on an outer periphery of the driving wheel 10, the driving wheel 10 will touch the intermediate lever 22 through the driving portion 11 and drive the same to rotate, and the other end of the rotating shaft 21 is connected to the pressure raising and pressing foot assembly 4, so as to drive the pressure raising and pressing foot assembly 4 to operate.

With reference to fig. 3 and 4 or fig. 7 and 8, the driving block 23 is installed on the periphery of the rotating shaft 21, the middle lever 22 is provided with an arc-shaped groove 221, a pushing block 231 is formed at one end of the driving block 23, the pushing block 231 is arranged in the arc-shaped groove 221, and in the actual working process, when the middle lever 22 rotates, the driving block 23 is driven to rotate through the matching of the arc-shaped groove 221 and the pushing block 231, and the rotating shaft 21 is driven to rotate at the same time.

With reference to fig. 1 and 3 or fig. 5 and 7, a rotatable foot-controlled pressure lifting lever 6 is arranged on the machine shell 1, one end of the foot-controlled pressure lifting lever 6 is connected with the lower end of the middle lever 22 through a pull rod 7, the other end of the foot-controlled pressure lifting lever 6 is connected with a foot-controlled pressure lifting assembly, and in the actual working process, the foot-controlled pressure lifting lever 6 is driven to rotate through the foot-controlled pressure lifting assembly by stepping on a pressure lifting plate on the sewing machine, so that the middle lever 22 in the pressure lifting lever connecting rod assembly 20 is driven to rotate through the pull rod 7, and the foot-operated pressure lifting action is executed.

The structure of the current market is as follows: lift presser foot and trimming can not simultaneous working, and the utility model discloses a lift the structure setting for the separation between presser foot link assembly 20 and the drive wheel 10, consequently can the simultaneous working, advance to lift the presser foot in single step and can control with step motor, also can with traditional foot chain simultaneous control, when the presser foot is lifted to the foot chain, can the while operation button step-by-step trimming, in the trimming, also can carry out the foot chain simultaneously and lift the presser foot, and present current single step advances the trimming and is unable the realization the utility model discloses a function.

Specifically referring to fig. 4 or 8, a pushing portion 222 is formed at the upper end of the intermediate lever 22, a rotatable roller 223 is mounted on the pushing portion 222, and the roller 223 is used for contacting with the driving portion 11, so that friction force can be reduced, abrasion can be reduced, and the service life can be prolonged.

And a reset torsion spring 3 is arranged between the lower end of the middle lever 22 and the machine shell 1, and the reset torsion spring 3 is used for resetting the middle lever 22.

Referring to fig. 2 and 3 or fig. 6 and 7, the specific structure of the wire-cutting connecting rod assembly 30 is further described, where the wire-cutting connecting rod assembly 30 includes a long rocker 32, the upper end of the long rocker 32 is provided with the driving pin 31, the middle of the long rocker 32 is hinged with a rocker fixing plate 33, the other end of the rocker fixing plate 33 is connected with the casing 1, the lower end of the long rocker 32 is hinged with a short rocker 34, and the other end of the short rocker 34 is connected with the wire-cutting assembly 5, referring to fig. 2 and 3 in particular, when the driving pin 31 passes through the driving curved surface 12, the long rocker 32 will be pulled, and the scissors assembly 5 will be pulled to move by the short rocker 34, referring to fig. 6 and 7 in particular, when the driving pin 31 passes through the driving curved surface 12, the long rocker 32 will be driven to rotate, and the scissors assembly 5 will be driven to move by the short rocker 34.

The end of the driving pin 31 is spherical to facilitate its sliding inside the driving curve 12.

Specifically, referring to fig. 4, the driving curved surface 12 is formed on one side surface of the driving wheel 10, specifically, referring to fig. 8, a driving groove is formed in the driving wheel 10, the driving curved surface 12 is formed on a side wall of the driving groove, the driving curved surface 12 includes a first idle stroke surface 121 for enabling the trimming assembly 5 to rotate clockwise and a second idle stroke surface 122 for enabling the trimming assembly 5 to rotate counterclockwise, a trimming driving curved surface 123 is disposed between the first idle stroke surface 121 and the second idle stroke surface 122, when the driving pin 31 slides into the first idle stroke surface 121 from the trimming driving curved surface 123, the trimming assembly 5 rotates counterclockwise, and when the driving pin 31 slides into the second idle stroke surface 122 from the trimming driving curved surface 123, the trimming assembly 5 rotates counterclockwise, so that the trimming assembly 5 performs a trimming operation by reciprocating motion.

Specifically referring to fig. 2 or 6, the trimming link assembly 30 is further provided with a spring 13 for returning the trimming link assembly, the spring includes a tension spring or a torsion spring, and the like, and when only the driving curved surface 12 pushes the trimming assembly 5 unilaterally, the returning of the trimming assembly 5 is returned by the action of the spring 13.

Be provided with flat bearing 8 between the terminal surface of drive wheel 10 and motor 2, stability when can improving drive wheel 10 and rotate, stopper 9 is installed to the outer end of drive wheel 10, can restrict drive pin 31's shift position, prevents that drive pin 31's offset from breaking away from drive wheel 10.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. 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. A single cam thread trimming and presser foot lifting driving mechanism of a overedger is characterized by comprising

The motor comprises a shell (1), wherein a motor (2) is transversely arranged on one side of the shell (1);

a driving wheel (10) which is arranged on the output shaft of the motor (2) and rotates along with the output shaft;

the foot lifting and lifting connecting rod assembly (20) is arranged on one side of the driving wheel (10) and used for executing foot lifting action, a driving part (11) used for driving the foot lifting and lifting connecting rod assembly (20) is formed on the periphery of the driving wheel (10), and the driving wheel (10) rotates to enable the driving part (11) to drive the foot lifting and lifting connecting rod assembly (20) to act and execute the foot lifting action;

the trimming connecting rod assembly (30) is arranged on one side of the driving wheel (10) and used for performing trimming actions, a driving curved surface (12) is formed on one side of the driving wheel (10), a driving pin shaft (31) for driving the trimming connecting rod assembly (30) within a certain stroke is arranged in the driving curved surface (12), the driving pin shaft (31) is connected with the trimming connecting rod assembly (30), the driving curved surface (12) comprises a first idle stroke surface (121), a second idle stroke surface (122) and a trimming driving curved surface (123), the trimming driving curved surface (123) is arranged between the first idle stroke surface (121) and the second idle stroke surface (122), the driving wheel (10) rotates, and when the driving pin shaft (31) passes through the trimming driving curved surface (123), the trimming actions are performed;

a plane bearing (8) is arranged between the end faces of the driving wheel (10) and the motor (2), and a limiting block (9) is installed at the outer end of the driving wheel (10).

2. The single cam thread trimming and presser foot lifting drive mechanism of a overedger according to claim 1, characterized in that: the rotating area of the driving wheel (10) can be divided into a first adjusting area (A1) and a second adjusting area (A2); the first regulating area (A1) and the second regulating area (A2) form a continuous circular area;

when the driving pin shaft (31) is positioned at the trimming driving curved surface (123) to move, the first adjusting area (A1) is marked as a first adjusting area (A1) and corresponds to the electric control trimming of the sewing machine;

when the rotating wheel (223) is positioned at the driving part (11) to move, the rotating wheel is marked as a second adjusting area (A2), and the second adjusting area (A2) corresponds to an electric control pressure lifting foot of the sewing machine;

the thread cutting assembly (5) is positioned at the position of electrically cutting off sewing threads, and the driving pin shaft (31) is positioned in the range of the first adjusting area (A1);

when the presser foot lifting assembly (4) is in an electric control state for lifting or putting down the presser foot, the rotating wheel (223) is positioned in the range of the second adjusting area (A2);

when the presser foot lifting component (4) is in an electric control presser foot lifting state, and simultaneously when the thread cutting component (5) is in a position for cutting off sewing threads, the rotating wheel (223) and the driving pin shaft (31) are positioned in a common area between the first adjusting area (A1) and the second adjusting area (A2);

when the presser foot lifting assembly (4) is used for lowering the presser foot and the thread cutting assembly (5) is used for cutting off the sewing thread, the rotating wheel (223) and the driving pin shaft (31) are positioned in the common area between the first adjusting area (A1) and the second adjusting area (A2);

when the electric control pressure raising and pressing component (4) is not executed to act, the foot control pressure raising and pressing component can execute the action of the pressure raising and pressing component (4).

3. The single cam thread trimming and presser foot lifting drive mechanism of a overedger according to claim 1, characterized in that: the pressure foot lifting connecting rod component (20) comprises a rotating shaft (21) which is rotatably arranged in the machine shell (1), a middle lever (22) is installed at one end of the rotating shaft (21), the upper end of the middle lever (22) is located on one side of the driving portion (11), and the other end of the rotating shaft (21) is connected with the pressure foot lifting component (4).

4. The single cam thread trimming and presser foot lifting drive mechanism of the overlock sewing machine as claimed in claim 3, wherein: the periphery of axis of rotation (21) is installed drive block (23), seted up arc groove (221) on middle lever (22), the one end shaping of drive block (23) has ejector pad (231), and ejector pad (231) sets up in arc groove (221).

5. The single cam thread trimming and presser foot lifting drive mechanism of a overedger according to claim 3, characterized in that: a rotatable foot control lifting and pressing lever (6) is arranged on the machine shell (1), one end of the foot control lifting and pressing lever (6) is connected with the lower end of the middle lever (22) through a pull rod (7), and the other end of the foot control lifting and pressing lever (6) is connected with a foot control lifting and pressing assembly.

6. The single cam thread trimming and presser foot lifting drive mechanism of the overlock sewing machine as claimed in claim 3, wherein: the upper end of the middle lever (22) is formed with a pushing part (222), and a rotatable rotating wheel (223) is arranged on the pushing part (222).

7. The single cam thread trimming and presser foot lifting drive mechanism of a overedger according to claim 6, characterized in that: and a reset torsion spring (3) is arranged between the lower end of the middle lever (22) and the machine shell (1).

8. The single cam thread trimming and presser foot lifting drive mechanism of a overedger according to claim 1, characterized in that: the trimming connecting rod assembly (30) comprises a long rocker arm (32), the upper end of the long rocker arm (32) is provided with the driving pin shaft (31), the middle part of the long rocker arm (32) is hinged with a rocker arm fixing plate (33), the other end of the rocker arm fixing plate (33) is connected with the machine shell (1), the lower end of the long rocker arm (32) is hinged with a short rocker arm (34), and the other end of the short rocker arm (34) is connected with the trimming assembly (5).

9. The single cam thread trimming and presser foot lifting drive mechanism of a overedger according to claim 1, characterized in that: the end part of the driving pin shaft (31) is spherical; the driving part (11) is arranged on the periphery of the driving wheel (10) in a protruding mode.