CN210796878U

CN210796878U - Novel trimming device and trimming and presser foot lifting integrated device

Info

Publication number: CN210796878U
Application number: CN201921524906.8U
Authority: CN
Inventors: 周善足; 蒋达淼; 林新博; 周毅伟
Original assignee: Taizhou Supu Electrical Co ltd
Current assignee: Taizhou Supu Electrical Co ltd
Priority date: 2019-09-15
Filing date: 2019-09-15
Publication date: 2020-06-19
Anticipated expiration: 2029-09-15

Abstract

The utility model discloses a novel trimming device and contain device's trimming and lift integrative device of presser foot belongs to sewing machine technical field. The purpose of the utility model is realized like this: a novel thread trimming device comprises a firing part which drives a cutter driving shaft to axially move through a driving device, wherein one side of the firing part is sequentially connected with a first vertical shaft and a first transverse pull rod, one side of the first transverse pull rod is hinged with a middle plate, and the upper end of the middle plate is rotatably arranged on a shell; the right side of the middle plate is connected with a first vertical shaft. Through the lever action among the middle plate, the first transverse pull rod and the first vertical shaft, the trigger piece is driven to strike the cutter driving shaft, the cutter driving shaft is driven to axially move, the thread cutting is further realized, and the constraint of an electromagnet is thoroughly eliminated. Therefore, the problem that the shell is not suitable for refitting due to high cost and easy clamping is solved, and meanwhile, the line can be cut only by enabling the triggering part to rotate to hit the driving shaft of the cutting knife, so that the problem of service life is solved.

Description

Novel trimming device and trimming and presser foot lifting integrated device

Technical Field

The utility model belongs to the technical field of sewing machine, refer in particular to a novel trimming device and contain device's trimming and lift integrative device of presser foot.

Background

At present, the functions of a computer flat sewing machine are more and more, and automatic thread trimming is one of the indispensable functions. But the thread trimming mechanism of the existing flush joint machine is usually driven by adopting an electromagnet. Such structure often because the electro-magnet product is high in price and often because automatic trimming is the function that often will use in the flush joint machine use, the problem that practical life is not long often can appear in the electro-magnet under high frequency work. Meanwhile, the electromagnets are often arranged on the lower end face of the bottom plate, so that the phenomenon that the electromagnets are clamped by cloth scraps of clothes and cloth often occurs. Meanwhile, the existing installation mode needs to be installed when the sewing machine leaves a factory, and the common flat sewing machine cannot be realized through refitting.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can long service life, can not have a novel trimming device of card shell and general repacking and utilize the device to realize the trimming and lift presser foot body design.

The purpose of the utility model is realized like this: a novel thread trimming device comprises a driving device for driving a thread trimming component to move, wherein the driving device at least comprises a first vertical shaft and a first transverse pull rod; one side of the first transverse pull rod is hinged with an intermediate plate, and the upper end of the intermediate plate is rotatably arranged on the shell; the right side of the middle plate is connected with a first vertical shaft.

Preferably, the novel thread cutting device further comprises a triggering piece which drives the cutter driving shaft to move axially through a driving device, one side of the triggering piece is sequentially connected with a first vertical shaft and a first cross pull rod, and the triggering piece is provided with the driving device in the axial direction of the cutter driving shaft so as to drive the cutter driving shaft to move axially through the triggering piece; the firing piece is sleeved with a reset device.

Preferably, the resetting device comprises a mounting baffle fixedly arranged on the casing, one side of the mounting baffle abuts against one end of the spring, the firing piece penetrates through the mounting baffle and is sleeved in the spring, the other end of the spring abuts against a retainer ring, and the retainer ring is connected with the firing piece.

Preferably, the mounting device further comprises a mounting seat, and the mounting baffles are formed on the mounting seat and distributed on two sides of the mounting seat; the firing piece simultaneously penetrates through the two mounting baffles.

Preferably, the driving device comprises a driving plate with one end hinged with the machine shell, and the firing part is arranged on one side of the driving plate; and the other side of the driving plate is also provided with a swinging driving assembly for driving the driving plate to rotate.

Preferably, the swing driving assembly comprises a first vertical shaft, one side of the first vertical shaft is connected with one side of the driving plate, and the other side of the first vertical shaft is connected with a rotary power source.

Preferably, the swing driving assembly further comprises a roller, and one side of the roller is connected with the first vertical shaft; the upper end face of the driving plate is formed with an arc-shaped concave part, and the roller can be arranged on the concave part in a rolling manner; the rear side of gyro wheel is provided with spacing slip table, and the last shaping of spacing slip table has the spout of vertical setting, and the gyro wheel slides in the spout.

Preferably, the driving device comprises a rotary power source fixedly arranged on one side of the long edge of the shell, one side of the rotary power source is connected with a cam, one side of the cam is provided with a trimming push rod and a first transverse pull rod, and the cam is connected with a triggering piece through the first transverse pull rod to drive the cutter driving shaft to axially move.

Preferably, one side of the first transverse pull rod is hinged with a middle plate, and the upper end of the middle plate is rotatably arranged on the shell; the right side of the middle plate is connected with a first vertical shaft; the firing piece and the cutter driving shaft are coaxially arranged; a hemispherical abutting part is formed on one side of the firing piece and abuts against one side of the driving device; the device comprises a rotary power source, a shell connecting part, a pressing and lifting push rod, a lifting and pressing push rod and a lifting and pressing push rod, wherein the rotary power source is arranged on the shell; the bending area is used for penetrating through the shell and enabling the abutting connection part to be hinged with the trimming push rod and the lifting push rod; the rotary power source is a stepping motor, and the cam is an involute cam.

The thread trimming and presser foot lifting integrated device comprises the novel thread trimming device; the lifting and pressing device further comprises a lifting and pressing driving part arranged on the other side of the cam, and the lifting and pressing driving part is used for driving the lifting and pressing foot lifting plate component to rotate.

Preferably, the pressure lifting driving part comprises a pressure lifting push rod and a pressure lifting pull rod, and one end of the pressure lifting pull rod is hinged with the upper end part of the pressure lifting foot lifting plate assembly; the other end of the lifting and pressing pull rod is hinged with the upper end of the lifting and pressing push rod, and the lower end of the lifting and pressing push rod is rotatably arranged through a fixing pin.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

according to the technical scheme, the triggering piece is driven to hit the cutter driving shaft through the lever action among the middle plate, the first transverse pull rod and the first vertical shaft, so that the cutter driving shaft is driven to axially move, further, the wire shearing is realized, and the constraint of an electromagnet is thoroughly eliminated. Therefore, the problem that the shell is not suitable for refitting due to high cost and easy clamping is solved, and meanwhile, the line can be cut only by enabling the triggering part to rotate to hit the driving shaft of the cutting knife, so that the problem of service life is solved.

Drawings

FIG. 1 is one of the schematic structural diagrams for practical application of the present solution;

FIG. 2 is a schematic view of the device after the housing halves are hidden;

FIG. 3 is a second schematic diagram of the practical application of the present solution

FIG. 4 is a second schematic view of the device after the half-case is hidden;

FIG. 5 is a schematic view of the thread trimming and presser foot lifting integrated device;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a schematic view of a mounting bracket;

FIG. 8 is a schematic structural view of the automatic presser foot lifting function;

FIG. 9 is a schematic view of the device of FIG. 1 after the head half has been hidden;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

FIG. 11 is one of the schematic structural illustrations of FIG. 9 after the rotational power source position has been moved;

fig. 12 is a second schematic view of the structure of fig. 9 after the rotational power source position is moved.

In the figure: 1-a machine shell; 2-a source of rotational power; 3-a cam; 4-trimming the push rod; 5-a cutter drive shaft; 6-lifting the presser foot lifting plate component; 7-a first track rod; 8-a first vertical axis; 10, installing a baffle; 11-a spring; 12-a retainer ring; 13-a mounting seat; 14-a firing member; 15-a drive plate; 16-a roller; 17-a recess; 18-a limit slide table; 19-a chute; 20-a middle plate; 21-lifting and pressing the push rod; 22-lifting and pressing the pull rod; 23-a securing pin; 24-a mounting bracket; 25-abutting the connection; 26-a housing connection; 27-a bending zone; 28-hemispherical abutment; 29-fixed edge; 30-lower positioning sleeve; 31-a return spring; 32-a limiting block; 33-a fixed seat; 34-connecting a rocker; 35-thread trimming assembly.

Detailed Description

The present invention is further described below in terms of specific embodiments, as shown in fig. 1-12.

The invention will be further described with reference to specific embodiments.

The first embodiment is as follows: a novel thread trimming device comprises a firing part 14 for driving a cutter driving shaft 5 to axially move, wherein a driving device is arranged on one side of the firing part 14 so as to drive the cutter driving shaft 5 to axially move; a resetting device is sleeved outside the firing piece 14.

The housing 1 according to the present embodiment is a housing of a sewing machine, and the features are only for convenience of description and are not technical features to which the present product belongs. The thread cutting principle of the existing sewing machine is generally completed by a thread cutting assembly, and the thread cutting assembly in the technical scheme refers to components except thread cutting electromagnets for realizing automatic thread cutting in the traditional flat sewing machine, such as a cutter driving shaft 5, a thread cutting cam 3, a crank assembly, a movable cutter holder and other components. The core action of the traditional thread cutting of the sewing machine is to drive the axial movement of the cutter driving shaft 5 through the thread cutting electromagnet. In the case of the conventional thread cutting arrangement, the thread cutting movement can therefore be carried out as long as the axial movement of the cutter drive shaft 5 is carried out. The purpose of simply processing the casing to achieve the modification during the installation and modification of the cutter driving shaft 5 is the conventional means of those skilled in the art and will not be described herein.

Therefore, the working principle of the technical scheme is that the firing part 14, the cutter driving shaft 5 and the driving device are coaxially arranged at first. The advantage of this design is that the drive means can drive the movement of the cutter drive shaft 5 by means of the firing member 14 with a simple telescopic movement. The drive means may be a pneumatic cylinder, a linkage, or other structure or device capable of driving movement of the firing member 14. The reset device is a device that can drive the firing member 14 to reset after being fired by the driving device, such as a hard connection directly with the firing member 14, and can pull the firing member 14 back when the driving device is used in reverse. If the air cylinder extends, the striking process is carried out, and if the air cylinder retracts, the resetting process is carried out.

The advantage of design like this does not need to install the electro-magnet on the bottom plate, consequently does not need the electro-magnet just reduced the cost just can not appear the phenomenon of card shell.

Preferably, the resetting device comprises a mounting baffle 10 fixedly arranged on the machine shell, one side of the mounting baffle 10 abuts against one end of a spring 11, the firing piece 14 penetrates through the mounting baffle 10 and is sleeved in the spring 11, the other end of the spring 11 abuts against a retainer ring 12, and the retainer ring 12 is connected with the firing piece 14.

The technical scheme illustrates a structural embodiment of the resetting device, the mounting baffle 10 is used for realizing the abutting of one end of the spring 11, and the abutting of the other end of the spring 11 is realized through the retainer ring 12. Meanwhile, because the retainer 12 is connected with the firing member 14, when the firing member 14 is driven by the driving device to move towards the axial direction of the cutter driving shaft 5, the spring 11 is stopped by the mounting baffle 10, locked by the retainer 12 and compressed, and then reset can be realized under the action of the spring 11 after the driving device releases the driving force or moves reversely. The structure is simple and effective, and the automatic reset function can be realized. And the reaction is rapid, and the method particularly meets the condition of high requirement on time nodes in automatic trimming operation.

Preferably, the installation structure further comprises an installation seat 13, and the installation baffles 10 are molded on the installation seat 13 and distributed on two sides of the installation seat 13; the firing member 14 passes through both of the mounting blocks 10 simultaneously.

The mounting base 13 of the present invention may be a plate, which is fixed on the casing, and two mounting baffles 10 are disposed on the mounting base 13. The firing member 14 can be positioned by passing through the two mounting baffles 10 at the same time, and the firing member 14 can be ensured to be coaxial with the axial direction of the cutter driving shaft 5 all the time in the moving process.

Preferably, the driving device comprises a driving plate 15 with one end hinged with the shell, and the firing member 14 is arranged on one side of the driving plate 15; the other side of the driving plate 15 is also provided with a swing driving assembly for driving the driving plate 15 to rotate.

In actual use, the preferred shape of the drive plate 15 is triangular and further its shape is a right triangle. The area where the drive plate 15 is hinged to the housing is where the cathetus and hypotenuse border and face the side of the firing member 14. Meanwhile, in order to further increase the moment, the displacement of a larger distance can be brought by swinging at a smaller angle. The connection of the oscillating drive assembly to the drive plate 15 should be suitably located at the intersection of the other cathetus and the hypotenuse. Of course, there are other positions and angles of oscillation for the oscillating drive assembly, as long as the drive plate 15 is enabled to drive the firing member 14.

The structural form of the swing driving assembly can also take a plurality of ways, for example, dragging by a small air cylinder or a structure such as a gear rack pair of a link mechanism.

Preferably, the swing driving assembly comprises a first vertical shaft 8, one side of the first vertical shaft 8 is connected with one side of the driving plate 15, and the other side of the first vertical shaft 8 is connected with the rotary power source 2.

The present embodiment specifically exemplifies one of the structural forms of the swing drive assembly. The first vertical shaft 8 is connected to the drive plate 15 in an articulated manner. The swinging of the drive plate 15 is achieved by the traction of the rotary power source 2 on the first vertical shaft 8.

Preferably, the swing driving assembly further comprises a roller 16, and one side of the roller 16 is connected with the first vertical shaft 8; the upper end surface of the driving plate 15 is formed with an arc-shaped concave part 17, and the roller 16 can be arranged on the concave part 17 in a rolling way; the rear side of the roller 16 is provided with a limiting sliding table 18, a vertically arranged sliding groove 19 is formed in the limiting sliding table 18, and the rear side of the roller slides in the sliding groove 19.

The technical scheme specifically discloses a structural form of a swing driving assembly. In practical use, the first vertical shaft 8 is driven by the rotary power source 2 to move downwards, and preferably because of the function of the limit sliding table 18, the roller 16 slides in the sliding groove 19, and at this time, the driving plate 15 rotates to drive the firing member 14 to move, so that the trimming motion is realized.

Preferably, the driving device comprises a rotary power source 2 fixedly arranged on one side of the long edge of the machine shell 1, one side of the rotary power source 2 is connected with a cam 3, one side of the cam 3 is provided with a trimming push rod 4 and a first transverse pull rod 7, and the first transverse pull rod 7 is connected with a triggering piece 14 to drive the axial movement of the cutter driving shaft 5.

According to the technical scheme, the forward stroke and the forward speed of the cutter driving shaft 5 can be controlled when the cam 3 rotates towards one side of the trimming push rod 4. The cam 3 according to the present technical solution preferably adopts a symmetrical cam 3, and the trimming push rod 4 is used for realizing the abutment of the cam 3 in practical use. Therefore, when the cam 3 rotates towards the direction of the trimming push rod 4, the trimming push rod 4 can be driven to move, and further the trimming pull rod assembly is driven to move to finally realize the axial movement of the cutter driving shaft 5, so that the trimming push rod 4 can be driven to move under the action of the cam 3 through the driving of the rotary power source 2. The thread trimming push rod 4 in the technical scheme can also be made of various materials, shapes or structures, and specifically comprises a plate arranged along the radial direction of the cam 3, and the plate can be a spherical body or other objects capable of moving under the driving of the cam 3.

Preferably, one side of the first tie rod 7 is hinged with an intermediate plate 20, and the upper end of the intermediate plate 20 is rotatably arranged on the machine shell; the right side of the middle plate 20 is connected with a first vertical shaft 8; in actual manufacturing, the position of the rotary power source 2 is located in the middle of the long side of the casing, and if the first tie rod 7 is directly connected to the first vertical shaft 8, the length of the first tie rod 7 is too long. Also preferably, the position where the trimming push rod 4 is hinged to the first track rod 7 will be at the lower end, and the upper end of the intermediate plate 20 will result in the intermediate plate 20 being rotatable due to the hinge to the housing. In addition, the two sides of the middle plate 20 are respectively connected with the first transverse pull rod 7 and the first vertical shaft 8 to form a seesaw structure.

The firing piece 14 is coaxially arranged with the cutter driving shaft 5; a hemispherical abutting part 28 is formed on one side of the firing piece 14, and the hemispherical abutting part 28 abuts against one side of the driving device; the design of the hemispherical abutting part can reduce impact force and prolong the service life of the product.

A mounting bracket 24 is arranged on one side of the rotary power source 2, a casing connecting part 26 and an abutting connecting part 25 are formed on the mounting bracket 24, the casing connecting part 26 is used for connecting and fixing on the casing 1, and the abutting connecting part 25 is used for respectively hinging a trimming push rod 4 and a lifting push rod 21; a bending area 27 between the machine shell connecting part 26 and the abutting connecting part 25, wherein the bending area 27 is used for penetrating through the machine shell and enabling the abutting connecting part 25 to be hinged with the trimming push rod 4 and the lifting push rod 21; the rotary power source 2 is a stepping motor, and the cam 3 is an involute cam. The technical scheme specifically discloses a fixing mode of a thread trimming push rod 4 and a lifting and pressing push rod 21. The manner in which these two parts are secured is important in practice because these two parts will necessarily be subjected to the impact force of the cam 3.

According to the technical scheme, the mounting bracket 24 is fixed on the machine shell 1, and the wire cutting push rod 4 and the lifting and pressing push rod 21 are connected through the mounting bracket 24. The specific principle is that the mounting bracket 24 is divided into two parts, one being a case connection part 26 and an abutting connection part 25. The case connecting portion 26 is adapted to be fixed to the case 1 by a fastener. The abutment connection 25 can then be realized by a shaft articulation with the trimming push rod 4 and the lift and press push rod 21. This allows the joint between the lower ends of the trimming push rod 4 and the lift push rod 21 and the abutting joint 25 to be a pivot point for rotation.

The selection of the stepping motor can be quickly and accurately operated according to the set angle through a computer program. In practical operation, in order to realize the thread cutting and the presser foot lifting, parameters such as the rotation angle, time, speed and the like of the stepping motor need to be controlled by a program, and the parameters belong to materials which can be obtained by routine experiments of a person skilled in the art and are not the key points of protection of the technical scheme, and are not described in detail herein.

The thread trimming and presser foot lifting integrated device comprises the novel thread trimming device; the lifting and pressing mechanism further comprises a lifting and pressing driving part arranged on the other side of the cam 3, and the lifting and pressing driving part is used for driving the lifting and pressing foot lifting plate component 6 to rotate.

This technical scheme specifically discloses the structural design that can lower cost realize automatic trimming and lift the presser foot automatically. The technical scheme is realized by the following steps that firstly, a rotary power source 2 is needed, and the power source can rotate, be manually driven, or be driven by a motor or other parts capable of rotating. Preferably the present solution preferably uses a stepper motor as a preferred choice for the rotary power source 2. The stepping motor has the advantages that the rotating angle of the stepping motor is accurate, and particularly, the rotating angle and the rotating speed of the stepping motor can be accurately controlled by matching with an electric control system. The design can control the lifting height and speed of the presser foot when the cam 3 rotates towards one side of the lifting and pressing driving part, and can control the advancing stroke and speed of the cutter driving shaft 5 when the cam 3 rotates towards one side of the trimming driving part.

Meanwhile, the position of the rotary power source 2 is arranged on one side of the casing 1, specifically, the side of the long edge of the casing 1 is the side of the casing 1 on which the installation window is formed. Preferably, it should be placed at a position in the middle of the long side. The placing position can simultaneously realize the functions of trimming and lifting the presser foot. And therefore may be placed in other locations if only one of the functions is to be performed.

The cam 3 according to the present disclosure is preferably a symmetrical cam 3, so that the corresponding function can be realized by driving the rotary power source 2, regardless of the left or right direction. The thread cutting driving part in the technical scheme refers to a part which can drive the thread cutting assembly to move back and forth under the action of the cam 3.

Preferably, the lifting and pressing driving part comprises a lifting and pressing push rod 21 and a lifting and pressing pull rod 22, and one end of the lifting and pressing pull rod 22 is hinged with the upper end part of the lifting and pressing foot lifting plate assembly 6; the other end of the lifting and pressing pull rod 22 is hinged with the upper end of the lifting and pressing push rod 21, and the lower end of the lifting and pressing push rod 21 is rotatably arranged through a fixing pin 23.

This technical scheme specifically discloses a lift structure principle who presses drive division. Specifically, in the field of a flat sewing machine, to lift the presser foot, one of the core actions is to drive the upper end of the presser foot lifting plate assembly 6 to rotate.

Firstly, a presser foot lifting and lifting plate assembly 6 is simply introduced, the middle part of the traditional presser foot lifting and lifting plate assembly 6 is rotatably arranged in a machine shell 1, the upper end of the traditional presser foot lifting and lifting plate assembly is connected with a tooth lifting foot pull rod with a drag hook, and one end of the tooth lifting foot pull rod is sequentially connected with a rear presser foot lifting lever, a presser foot lifting ejector rod and an electromagnet assembly. In daily work, the electromagnet is driven to further enable the tooth lifting foot pull rod to pull the upper end portion of the presser lifting foot lifting plate assembly 6 to enable the presser lifting foot to rotate, and therefore the presser lifting foot is driven to lift. The specific structure principle belongs to the common general knowledge in the field of flat sewing machines, and is not described in detail herein.

Therefore, the prior art presser foot lifting assembly is usually realized by an electromagnet. Therefore, not only the machine shell 1 needs to be changed, but also a set of electromagnet assembly needs to be added, the cost is high, and the service life is short.

In the technical scheme, a pressure lifting push rod 21 is designed to receive power transmitted from the cam 3, and then the pressure lifting pull rod 22 is connected with the upper end part of the pressure lifting foot lifting plate assembly 6, so that the upper end part of the pressure lifting foot lifting plate assembly 6 can be hinged. Thereby, the operation of lifting the presser foot can be realized. Meanwhile, the control of the height of the presser foot lifting can be realized by the operation mode, specifically, the rotation angle of the stepping motor is further controlled to control the rotation angle of the cam so as to control the operation stroke of the presser foot lifting pull rod 22, and finally the rotation angle control of the presser foot lifting plate assembly 6 is realized, so that the control of the height of the presser foot lifting is realized. The technical scheme specifically introduces a connection mode of the pressure lifting pull rod 22 and the pressure lifting push rod 21 and a fixing mode of the pressure lifting push rod 21. The lifting push rod 21 can have a pivot point for rotation by being rotatably arranged with the fixed pin 23. Meanwhile, the fixing pin 23 can be connected in various ways, and two tabs can be added in the casing 1 to connect the fixing pin 23. Or by providing a bracket at the side connected to the rotary power source 2 and fixing by means of the rotary power source 2. This drives the movement of the lift-press lever 22 when the cam 3 is rotated.

Example two: the present embodiment is basically the same as the first embodiment, and the difference is: the lifting and pressing pull rod 22 is connected with the upper end part of the thread trimming pull rod assembly through a return spring 31; gaps are arranged between the trimming push rod 4 and the lifting and pressing push rod 21 and the cam 3, and the inner sides of the trimming push rod 4 and the lifting and pressing push rod 21 are respectively provided with a limiting block 32.

The technical scheme specifically discloses a technical scheme for realizing resetting after trimming. And the time difference between the two actions of trimming and lifting and pressing can be skillfully utilized to realize the reset operation of the other component.

However, the same function of return can also be achieved independently by using a spring in each of the lift-press lever 22 and the shear lever assembly. But the mode of the embodiment can reduce the cost of one spring.

The stopper 32 may be fixed to the head or may be fixed to one side of the rotary power source 2. The stopper 32 is mainly used to control the limit position and prevent over-rotation. The size of the gap and the position and size relationship between the stopper 32 and the cam 3 are not important in this application, and are not described herein.

Example three: the present embodiment is basically the same as the first embodiment, and the difference is: the lower ends of the trimming push rod 4 and the lifting push rod 21 are connected with a fixed seat 32. The fixed seat 32 can be fixedly connected with the casing or the motor.

Example four: the present embodiment is basically the same as the first embodiment, and the difference is: in the first embodiment, the power source is changed from the horizontal state to the vertical state by the vertical pulling eccentric part and the horizontal pulling eccentric part. The present embodiment provides another embodiment. As shown in fig. 11, the connecting rocker 34 is a plate-shaped object with three hinge parts, and the three hinge parts are respectively connected with the first tie rod 7 and the first vertical shaft 8. The other hinge part is rotatably arranged on the machine shell to realize the function similar to a seesaw. The design structure is simple and clear. Is the preferred structural design.

Example five: the present embodiment is basically the same as the first embodiment, and the difference is: as shown in fig. 2-7, the line-cutting mode after the first vertical shaft 8 swings is different, and specifically, when the connecting rocker 34 rotates, the first vertical shaft 8 is driven to move up and down, and then an eccentric structure is driven, as shown in fig. 6 and 7, the up and down movement is converted into a rotational movement. Which in turn drives a shear spool to rotate, the position of the shear spool being the major axis between the labels "35" and "8" in fig. 6. The rotation of the thread cutting shaft is around the axis thereof, and then the thread cutting assembly 35 can be driven to rotate, thereby realizing the thread cutting operation.

The structure principle is that the firing piece is not arranged, and the structure is another new structure.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a novel trimming device which characterized in that: the device comprises a driving device for driving a trimming component to move, wherein the driving device at least comprises a first vertical shaft (8) and a first transverse pull rod (7); one side of the first transverse pull rod (7) is hinged with an intermediate plate (20), and the upper end of the intermediate plate (20) is rotatably arranged on the shell; the right side of the middle plate (20) is connected with a first vertical shaft (8).

2. The novel thread trimming device according to claim 1, wherein: the novel thread shearing device further comprises a triggering piece (14) which drives the cutter driving shaft (5) to axially move through a driving device, one side of the triggering piece (14) is sequentially connected with a first vertical shaft (8) and a first transverse pull rod (7), and the triggering piece (14) is provided with the driving device in the axial direction of the cutter driving shaft (5) so as to drive the cutter driving shaft (5) to axially move through the triggering piece (14); a reset device is sleeved outside the firing piece (14).

3. The novel thread trimming device according to claim 2, wherein: the resetting device comprises a mounting baffle (10) fixedly arranged on the shell, one side of the mounting baffle (10) abuts against one end of a spring (11), the firing piece (14) penetrates through the mounting baffle (10) and is sleeved in the spring (11), the other end of the spring (11) abuts against a retainer ring (12), and the interior of the retainer ring (12) is connected with the firing piece (14);

the mounting baffle plate is characterized by further comprising a mounting seat (13), wherein the mounting baffle plate (10) is formed on the mounting seat (13) and distributed on two sides of the mounting seat (13); the firing piece (14) penetrates through the two mounting baffles (10) simultaneously.

4. The novel thread trimming device according to claim 2, wherein: the driving device comprises a driving plate (15) with one end hinged with the shell, and the firing part (14) is arranged on one side of the driving plate (15); the other side of the driving plate (15) is also provided with a swinging driving component for driving the driving plate (15) to rotate.

5. The novel thread trimming device according to claim 4, wherein: the swing driving assembly comprises a first vertical shaft (8), one side of the first vertical shaft (8) is connected with one side of the driving plate (15), and the other side of the first vertical shaft (8) is connected with a rotary power source (2).

6. The novel thread trimming device according to claim 5, wherein: the swing driving assembly further comprises a roller (16), and one side of the roller (16) is connected with the first vertical shaft (8); the upper end face of the driving plate (15) is formed with an arc-shaped concave part (17), and the roller (16) can be arranged on the concave part (17) in a rolling manner; the rear side of the roller (16) is provided with a limiting sliding table (18), a sliding groove (19) which is vertically arranged is formed in the limiting sliding table (18), and the roller (16) slides in the sliding groove (19).

7. The novel thread trimming device according to claim 1, wherein: the driving device comprises a rotary power source (2) fixedly arranged on one side of the long edge of the machine shell (1), one side of the rotary power source (2) is connected with a cam (3), one side of the cam (3) is provided with a trimming push rod (4) and a first transverse pull rod (7), and the cam (3) is connected with a trigger piece (14) through the first transverse pull rod (7) and drives the cutter driving shaft (5) to axially move.

8. The novel thread trimming device according to claim 7, wherein: the firing piece (14) is coaxially arranged with the cutter driving shaft (5); a hemispherical abutting part (28) is formed on one side of the firing piece (14), and the hemispherical abutting part (28) abuts against one side of the driving device; a mounting bracket (24) is arranged on one side of the rotary power source (2), a shell connecting part (26) and a propping connecting part (25) are formed on the mounting bracket (24), the shell connecting part (26) is used for being connected and fixed on the shell (1), and the propping connecting part (25) is used for being respectively hinged with a trimming push rod (4) and a lifting and pressing push rod (21);

a bending area (27) between the machine shell connecting part (26) and the abutting connecting part (25), wherein the bending area (27) is used for penetrating through the machine shell and enabling the abutting connecting part (25) to be hinged with the trimming push rod (4) and the lifting and pressing push rod (21); the rotary power source (2) is a stepping motor, and the cam (3) is an involute cam.

9. Trimming lifts integrative device of presser foot, its characterized in that: comprising the novel thread trimming apparatus of any one of claims 1 to 8; the lifting and pressing mechanism further comprises a lifting and pressing driving part arranged on the other side of the cam (3), and the lifting and pressing driving part is used for driving the lifting and pressing foot lifting plate component (6) to rotate.

10. The trimming and presser foot lifting integrated device according to claim 9, wherein: the lifting and pressing driving part comprises a lifting and pressing push rod (21) and a lifting and pressing pull rod (22), and one end of the lifting and pressing pull rod (22) is hinged with the upper end part of the lifting and pressing foot lifting plate component (6); the other end of the lifting and pressing pull rod (22) is hinged with the upper end of the lifting and pressing push rod (21), and the lower end of the lifting and pressing push rod (21) is rotatably arranged through a fixing pin (23).