CN216006246U - Thread trimmer cutter head, thread trimmer system and sewing machine equipment - Google Patents

Abstract

The utility model discloses a thread trimmer cutter head and thread trimmer system, sewing machine equipment, thread trimmer cutter head includes the shell, blade subassembly and regulation separation blade, blade subassembly dress is at the shell tip, set up the negative pressure induced draft passageway inside the shell, the regulation separation blade is installed at the tip of shell through adjustment mechanism, the regulation separation blade is located the air intake department of negative pressure induced draft passageway, the air intake is located blade subassembly one side, leave the fore-and-aft clearance between regulation separation blade and the blade subassembly, realize through adjustment mechanism that the clearance is adjusted along the removal of the fore-and-aft direction of shell, realize through adjustment mechanism that the regulation separation blade adjusts the difference in height of separation blade and blade subassembly along the reciprocating adjustment of shell; the size of the air inlet volume of the negative pressure air suction channel is adjusted through adjusting the size of the front gap and the rear gap, and the adjusting separation blade is adjusted through the adjusting mechanism along the up-and-down movement of the shell so as to adjust the height difference between the adjusting separation blade and the blade component, so that the cutter head of the thread trimmer can allow thread ends with different thread diameters to enter, and the thread ends are guaranteed to be thoroughly sheared.

Description

Thread trimmer cutter head, thread trimmer system and sewing machine equipment

Technical Field

The utility model belongs to the technical field of the thread trimmer, specifically speaking relates to a thread trimmer cutter head and thread trimmer system, sewing machine equipment.

Background

At present, the clothing industry uses a trimming equipment gradually, trimming machine promptly, current trimming machine tool bit structure, including shell and blade subassembly, the blade subassembly is installed at the shell top, the shell the inside sets up the negative pressure passageway of induced drafting, the negative pressure passageway of induced drafting communicates below the blade subassembly, induced draft the next door of passageway at the negative pressure, the motor is installed at the shell top, the motor is connected with the knife section of blade subassembly, still install an amount of wind trimmer at the shell top, the amount of wind trimmer shelters from the partial induction port of negative pressure passageway of induced drafting, and form the clearance between amount of wind trimmer and the blade subassembly, so that the end of a thread can inhale, this kind of trimming machine exists the shortcoming: the air volume adjusting sheet is arranged at the top of the shell, and the adjustability is poor, so that the size of a gap formed between the air volume adjusting sheet and the blade assembly cannot be adjusted, the thread end with large thread diameter cannot be sucked into the negative pressure air suction channel, and the thread end cannot be sheared thoroughly.

Disclosure of Invention

The utility model aims at providing a trimming machine tool bit and trimming machine system, sewing machine equipment, the controllability of solving air regulation piece among the prior art is poor, makes the end of a thread that the line footpath is big can not be inhaled in the negative pressure passageway that induced drafts, leads to the end of a thread to cut incomplete technical problem.

The technical scheme of the utility model is realized like this:

the utility model discloses a first purpose provides a trimming machine knife head, which comprises an outer shell, blade subassembly and regulation separation blade, the tip at the shell is installed to the blade subassembly, the shell the inside sets up the negative pressure passageway that induced drafts, the regulation separation blade passes through adjustment mechanism and installs the tip at the shell, it is located the air intake department that the negative pressure induced drafts the passageway to adjust the separation blade, the air intake is located one side of blade subassembly, clearance around leaving between regulation separation blade and the blade subassembly, realize through adjustment mechanism that the removal of regulation separation blade along the fore-and-aft direction of shell is adjusted clearance around, realize through adjustment mechanism that the separation blade is adjusted along reciprocating of shell and then the difference in height of adjustment regulation separation blade and blade subassembly.

Preferably, the adjusting mechanism comprises a connecting seat, a first adjusting hole arranged on the shell and a second adjusting hole arranged on the adjusting catch, the connecting seat is movably arranged in the shell, the adjusting catch is movably arranged on the connecting seat, the first adjusting hole is used for achieving the back and forth movement of the adjusting catch, and the second adjusting hole is used for achieving the up and down movement of the adjusting catch.

Preferably, a first screw hole and a second screw hole are arranged on the connecting seat, the first screw hole corresponds to the first adjusting hole, and the second screw hole corresponds to the second adjusting hole; a first screw penetrates through the first adjusting hole and is in threaded connection with the first screw hole, so that the connecting seat is installed in the shell; and a second screw penetrates through the second adjusting hole and is in threaded connection with the second screw hole, so that the adjusting separation blade is arranged on the connecting seat.

Preferably, the first adjusting hole and the second adjusting hole are U-shaped holes; the cross section of the adjusting baffle is L-shaped.

Preferably, the adjusting blocking piece comprises a mounting plate and a wind shield, the wind shield is located at the bottom of the mounting plate, the second adjusting hole is formed in the mounting plate, and a wind groove is formed in the wind shield.

Preferably, the housing is further provided with an accommodating cavity, the accommodating cavity is located on one side of the negative pressure air suction channel, a blade driving assembly is arranged in the accommodating cavity, and the blade driving assembly is connected with the blade assembly.

Preferably, the shell includes hand grip portion and installation department, blade subassembly adjust the separation blade adjustment mechanism with blade drive assembly all is located in the installation department, the hand grip portion with form contained angle alpha between the installation department, contained angle alpha's value range is between 130 to 170.

Preferably, the housing is made by injection moulding.

A second object of the present invention is to provide a thread trimmer system, which comprises a tool bit, a negative pressure suction fan, a photoelectric sensor, a controller and an automatic oil pumping and lubricating system, wherein the tool bit is the tool bit of the thread trimmer as described above, an air outlet of a negative pressure air suction channel of the tool bit is connected to the negative pressure suction fan, a motor of the tool bit is electrically connected to the controller, the negative pressure suction fan is electrically connected to the controller, and the controller is used for controlling the start and stop of the motor of the tool bit and the negative pressure suction fan;

the photoelectric sensor is positioned on one side of the cutter head and electrically connected with the controller;

the automatic oil pumping and lubricating system is electrically connected with the controller and used for providing lubricating oil for the blade assembly of the cutter head.

Preferably, the automatic oil pumping lubricating system comprises an oil storage cylinder, an oil pump, an oil pipe and a valve, wherein one end of the oil pipe is connected with the oil storage cylinder, the other end of the oil pipe extends into the top of the shell of the cutter head, an oil outlet of the oil pipe is positioned beside the blade assembly, and the oil pump and the valve are arranged in the middle of the oil pipe.

A third object of the utility model is to provide a sewing machine equipment, including workstation, sewing machine main part and thread trimmer system, the thread trimmer system be above-mentioned a thread trimmer system, the sewing machine main part is installed on the workstation, the tool bit setting of thread trimmer system is in one side of sewing machine main part, the tool bit of thread trimmer system is used for cuting the end of a thread of the work piece of accomplishing sewing processing through the sewing machine main part.

Compared with the prior art, the utility model, there is following advantage:

1. clearance around the removal that this scheme passes through adjustment mechanism realization regulation separation blade edge shell's fore-and-aft direction is adjusted, the size of the intake of negative pressure induced draft passageway can be adjusted to the size through clearance around the adjustment, thereby the suction size of adjustment wire cutting machine tool bit, and can realize adjusting the separation blade through adjustment mechanism along reciprocating of shell and then the difference in height of adjustment separation blade and blade subassembly, so that wire cutting machine tool bit can let the end of a thread of different footpaths get into, make wire cutting machine tool bit can realize the shearing of the end of a thread of multiple footpath in this scheme, moreover, the steam generator is simple in structure, high durability and convenient use, even the too big end of a thread of footpath also can be inhaled in the negative pressure induced draft passageway, guarantee that the end of a thread can thoroughly shear.

2. Other advantages of the present invention are described in detail in the examples section of this specification.

Drawings

Fig. 1 is a schematic three-dimensional structure view of a tool bit of a wire cutting machine provided by the present invention;

fig. 2 is a schematic view of a three-dimensional structure of the cutter head of the thread trimmer at another angle according to the present invention;

FIG. 3 is an enlarged schematic view of portion A provided in FIG. 2;

fig. 4 is an exploded schematic view of a tool bit of the wire cutting machine provided by the present invention;

fig. 5 is another exploded schematic view of the tool bit of the wire cutting machine according to the present invention;

fig. 6 is a schematic front view of the tool bit of the wire cutting machine according to the present invention;

FIG. 7 is a schematic cross-sectional view of B-B provided in FIG. 6;

fig. 8 is a schematic perspective view of the adjusting catch according to the present invention;

fig. 9 is a block diagram illustrating a control principle of a thread trimmer system according to a second embodiment of the present invention;

fig. 10 is a schematic structural diagram of a thread trimmer system according to a second embodiment of the present invention;

fig. 11 is a schematic structural view of a sewing machine apparatus provided in a third embodiment of the present invention (a tool bit is mounted on a sewing machine main body);

fig. 12 is a schematic structural view of a sewing machine device according to a third embodiment of the present invention (a tool bit is mounted on a worktable).

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 3, the present embodiment provides a cutter head of a thread trimmer, including a housing 1, a blade assembly 2 and an adjusting catch 3, wherein the blade assembly 2 is installed at an end portion of the housing 1, a negative pressure air suction channel 11 is arranged inside the housing 1, the adjusting catch 3 is installed at the end portion of the housing 1 through an adjusting mechanism 4, the adjusting catch 3 is located at an air inlet 110 of the negative pressure air suction channel 11, the air inlet 110 is located at one side of the blade assembly 2, a front-back gap 8 is left between the adjusting catch 3 and the blade assembly 2, the adjusting catch 3 is moved along the front-back direction of the housing 1 through the adjusting mechanism 4 to adjust the front-back gap 8, and the adjusting catch 3 is moved up and down along the housing 1 through the adjusting mechanism 4 to adjust a height difference between the adjusting catch 3 and the blade assembly 2; specifically, the adjusting mechanism 4 includes a connecting seat 41, a first adjusting hole 42 disposed on the housing 1, and a second adjusting hole 43 disposed on the adjusting catch 3, the connecting seat 41 is movably mounted in the housing 1, the adjusting catch 3 is movably mounted on the connecting seat 41, the first adjusting hole 42 is used for realizing the back-and-forth movement of the adjusting catch 3, and the second adjusting hole 43 is used for realizing the up-and-down movement of the adjusting catch 3.

This scheme passes through adjustment mechanism 4 and realizes adjusting separation blade 3 and adjust clearance 8 around along the removal of shell 1's fore-and-aft direction, the size of the intake of negative pressure air suction channel 11 can be adjusted to the size through clearance 8 around the adjustment, thereby the suction size of adjustment wire cutting machine tool bit, and can realize adjusting separation blade 3 and adjust separation blade 3 and blade subassembly 2's difference in height along reciprocating of shell 1 through adjustment mechanism 4, so that wire cutting machine tool bit can let the end of a thread in different footpaths get into, make wire cutting machine tool bit can realize the shearing of the end of a thread in multiple footpaths in this scheme, moreover, the steam generator is simple in structure, high durability and convenient use, even the too big end of a thread in footpath also can be inhaled in negative pressure air suction channel 11, guarantee that the end of a thread can thoroughly shear.

As shown in fig. 5 and 7, an accommodating cavity 12 is further provided in the housing 1, the accommodating cavity 12 is located at one side of the negative pressure suction channel 11, a blade driving assembly 7 is provided in the accommodating cavity 12, and the blade driving assembly 7 is connected to the blade assembly 2; specifically, the blade driving assembly 7 comprises a motor 71 and a connecting sleeve 72 sleeved outside a rotating shaft of the motor 71, the blade component 2 comprises a static blade 21 and a movable blade 22, one side of the static blade 21 and one side of the movable blade 22 are respectively provided with a row of cutter teeth, the static blade 21 and the movable blade 22 are arranged in an overlapping way, the movable blade 22 is provided with a transmission seat 23, the transmission seat 23 is provided with a sliding groove 231, an eccentric shaft is convexly arranged at one end of the connecting sleeve 72, a roller 8 is arranged on the eccentric shaft, the roller 8 is embedded into the sliding groove 231 of the transmission seat 23, the motor 71 is electrified to work, so that the eccentric shaft of the connecting sleeve 72 drives the transmission seat 23 to move left and right through the roller 8, because the transmission seat 23 is fixedly connected with the movable blade 22, the movable blade 22 can be driven to move back and forth rapidly, thereby generating a shearing effect between the static blade 21 and the movable blade 22, and the negative pressure air suction channel 11 sucks the thread end into the cutter head, and the thread end is sheared by the movable blade 22 and then is discharged.

As shown in fig. 4 and 5, a first screw hole 411 and a second screw hole 412 are provided on the connecting seat 41, the first screw hole 411 corresponds to the first adjusting hole 42, and the second screw hole 412 corresponds to the second adjusting hole 43; a first screw 5 is threaded with the first screw hole 411 through the first adjusting hole 42, so that the connecting seat 41 is installed in the housing 1; a second screw 6 is adopted to penetrate through the second adjusting hole 43 to be in threaded connection with the second screw hole 412, so that the adjusting baffle 3 is installed on the connecting seat 41; realize connecting seat 41, regulation separation blade 3 and shell 1's mutual installation through the screw for easy dismounting, when needs adjust, loosen the screw can, convenient to use.

The first adjusting hole 42 and the second adjusting hole 43 are U-shaped holes, so that the processing is simple and the adjustment is convenient.

As shown in fig. 8, the cross-sectional shape of the adjusting baffle 3 is L-shaped, specifically, the adjusting baffle 3 includes a mounting plate 31 and a wind shield 32, the wind shield 32 is located at the bottom of the mounting plate 31, the second adjusting hole 43 is formed in the mounting plate 31, the wind shield 32 is provided with a wind groove 33, the structure is simple, the manufacturing is convenient, and the design of the wind groove 33 is more convenient for the suction of the thread end.

As shown in fig. 6 and 7, the housing 1 includes a handle portion 13 and a mounting portion 14, the blade assembly 2, the adjusting blade 3, the adjusting mechanism 4 and the blade driving assembly 7 are all located in the mounting portion 14, and an included angle α is formed between the handle portion 13 and the mounting portion 14; specifically, the value range of the included angle α is 130 ° to 170 °; preferably, the included angle alpha is 150 degrees, so that a user can conveniently hold the scissors, and the experience of the user is improved.

The housing 1 is manufactured by injection molding; in particular, the housing 1 is assembled from two halves, which facilitates assembly.

Example two:

as shown in fig. 9, the present embodiment provides a thread trimmer system, which includes a tool bit 200, a negative pressure suction fan 9, a photoelectric sensor 20, a controller 30, and an automatic oil pumping lubrication system, where the tool bit 200 is the tool bit of the thread trimmer described above, an air outlet of a negative pressure suction channel 11 of the tool bit 200 is connected to the negative pressure suction fan 9, a motor 71 of the tool bit 200 is electrically connected to the controller 30, the negative pressure suction fan 9 is electrically connected to the controller 30, the controller 30 is connected to a mains supply, and the controller 30 is used to control the start and stop of the motor 71 of the tool bit 200 and the negative pressure suction fan 9; the photoelectric sensor 20 is positioned at one side of the cutter head 200, the photoelectric sensor 20 is electrically connected with the controller 30, the photoelectric sensor 20 is used for detecting whether cloth is arranged in front of the cutter head 200 or not and transmitting a detection signal to the controller 30, in the embodiment, the photoelectric sensor 20 is used for detecting whether cloth is arranged in front of the cutter head 200 or not, when no cloth is arranged, the controller 30 automatically cuts off the power supply of the cutter head 200 of the wire cutting machine immediately to stop the work of the cutter head 200, the abrasion is reduced, the service life of the cutter head is prolonged, and meanwhile, the electric energy is saved; the automatic oil pumping and lubricating system is electrically connected with the controller 30 and is used for providing lubricating oil for the blade assembly 2 of the cutter head 200; specifically, the automatic oil pumping lubrication system comprises an oil storage cylinder 40, an oil pump 50, an oil pipe 60 and a valve 70, wherein one end of the oil pipe 60 is connected with the oil storage cylinder 40, the other end of the oil pipe 60 extends into the top of the shell 1 of the cutter head 200, an oil outlet of the oil pipe 60 is positioned beside the blade assembly 2, and the oil pump 50 and the valve 70 are arranged in the middle of the oil pipe 60; the controller is electrically connected with the oil pump 50 and the valve 70 respectively and is used for controlling the start and stop of the oil pump 50 and the valve 70; the controller 30 can be provided with a timing switch module which is respectively electrically connected with the oil pump 50 and the valve 70, so that the automatic oil pumping lubrication system in the embodiment can automatically spray lubricating oil to the blade assembly 2 and the transmission mechanism at intervals, manual operation is not needed, the service life of the blade assembly 2 can be effectively prolonged, the cost is saved, the valve 70 is arranged in the middle of the oil pipe 60, the valve 70 is closed when the oil pump 50 stops working, and the lubricating oil cannot be sucked even if one oil outlet end of the oil pipe 60 is in a negative pressure state, so that the cost is saved and the function of automatic oil pumping lubrication at a timing is better realized; when the oil pump 50 starts to work, the valve 70 is also powered on and opened at the same time, so that the oil pump 50 can normally absorb oil and convey the oil to the cutter head 200.

As shown in fig. 10, in the present embodiment, the cutter head 200 is mounted on a workbench 80 through a bracket 10, and the blade assembly 2 of the cutter head 200 faces the front of the workbench, by the above scheme, the cutter head 200 is fixed, and a worker sits in front of the workbench to cut the thread end of the sewn workpiece, because the blade assembly 2 of the cutter head 200 faces the front of the workbench, the worker can cut the thread end of the workpiece more conveniently, the operation of the worker is facilitated, and the production efficiency can be effectively improved; in this embodiment, the controller 30 is also mounted on the table 80.

In this embodiment, the photoelectric sensor 20 is installed on the cutter head 200, and specifically, the photoelectric sensor 20 is close to the blade assembly 2 of the cutter head 200, so that no matter how the installation angle of the cutter head 200 is, it can be ensured that the photoelectric sensor 20 can monitor whether there is cloth in front of the cutter head 200 in real time, and the detection of the photoelectric sensor 20 is more accurate and reasonable in design.

The controller 30 comprises a microprocessor, a voltage transformation rectification voltage stabilizing circuit and a switch power supply circuit, wherein the input end of the voltage transformation rectification voltage stabilizing circuit is connected with a mains supply, the output end of the voltage transformation rectification voltage stabilizing circuit provides stable direct-current voltage for the photoelectric sensor 20 and the switch power supply circuit, the output end of the switch power supply circuit controls the on-off of the motor 71, the negative pressure suction fan 9, the oil pump 50 and the valve 70 of the cutter head 200, the photoelectric sensor 20 transmits a detection signal to the microprocessor, and the microprocessor analyzes the detection signal and then controls the on-off of the switch power supply circuit, so that the start-stop control of the motor 71, the negative pressure suction fan 9, the oil pump 50 and the valve 70 of the cutter head 200 is realized, and the design is reasonable; the timing switch module can be connected between the microprocessor and the switching power supply circuit, and of course, the timing switch module can also be a section of timing control program written in the microprocessor; in addition, a switch button for realizing the on-off electrical connection between the controller 30 and the mains supply is further arranged on the controller 30.

Example three:

as shown in fig. 11 and 12, the present embodiment provides a sewing machine apparatus, which includes a table 80, a sewing machine main body 90 and a thread trimmer system 100, wherein the thread trimmer system 100 is the thread trimmer system according to the second embodiment, the sewing machine main body 90 is installed on the table 80, a cutter head 200 of the thread trimmer system 100 is installed at one side of the sewing machine main body 90, the cutter head 200 of the thread trimmer system 100 is used for cutting a thread end of a workpiece that is finished by sewing through the sewing machine main body 90, the cutter head 200 of the thread trimmer system 100 can be installed on a side surface of the sewing machine main body 90 through an installation base or installed on the table 80 through a bracket 10, by installing the thread trimmer system 100 at one side of the sewing machine main body 90, when the workpiece is finished by a worker, cutting of the thread end can be directly realized without separately performing cutting of the thread end, and production efficiency can be effectively improved, the input of human hands is reduced, the labor cost is reduced, in addition, two functions are integrated on the same equipment, the input of the equipment can be reduced, and the equipment cost is reduced.

It should be noted that all the directional indicators (such as "upper", "lower", "front", "rear", "left", "right") in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the utility model such as "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.

Claims (11)

1. The utility model provides a wire cutting machine tool bit, includes shell (1), blade subassembly (2) and regulation separation blade (3), and the tip at shell (1) is installed in blade subassembly (2), and shell (1) the inside sets up negative pressure channel (11) that induced drafts, its characterized in that: adjust separation blade (3) and install the tip in shell (1) through adjustment mechanism (4), it is located air intake (110) department of negative pressure induced draft passageway (11) to adjust separation blade (3), air intake (110) are located one side of blade subassembly (2), it leaves front and back clearance (8) to adjust between separation blade (3) and blade subassembly (2), realize adjusting separation blade (3) through adjustment mechanism (4) and adjust front and back clearance (8) along the removal of the fore-and-aft direction of shell (1), realize adjusting the up-and-down of separation blade (3) along shell (1) and then the difference in height of adjustment separation blade (3) and blade subassembly (2) through adjustment mechanism (4).

2. The trimmer head of claim 1, wherein: adjusting mechanism (4) are in including connecting seat (41), setting first regulation hole (42) on shell (1) and setting are in adjust second regulation hole (43) on separation blade (3), movably the installing of connecting seat (41) in shell (1), it movably installs to adjust separation blade (3) on connecting seat (41), first regulation hole (42) are used for realizing adjust the back-and-forth movement of separation blade (3), second regulation hole (43) are used for realizing adjust the reciprocating of separation blade (3).

3. The trimmer head of claim 2, wherein: a first screw hole (411) and a second screw hole (412) are formed in the connecting seat (41), the first screw hole (411) corresponds to the first adjusting hole (42), and the second screw hole (412) corresponds to the second adjusting hole (43); a first screw (5) penetrates through the first adjusting hole (42) to be in threaded connection with the first screw hole (411), so that the connecting seat (41) is installed in the shell (1) in a passing mode; and a second screw (6) penetrates through the second adjusting hole (43) to be in threaded connection with the second screw hole (412), so that the adjusting baffle plate (3) is installed on the connecting seat (41).

4. The trimmer head of claim 3, wherein: the first adjusting hole (42) and the second adjusting hole (43) are U-shaped holes; the section of the adjusting baffle plate (3) is L-shaped.

5. The trimmer head of claim 4, wherein: adjust separation blade (3) and include mounting panel (31) and deep bead (32), deep bead (32) are located the bottom of mounting panel (31), second regulation hole (43) are seted up on mounting panel (31) be provided with wind groove (33) on deep bead (32).

6. A thread trimmer cutter head according to any one of claims 1 to 5, characterized in that: the negative pressure air suction device is characterized in that an accommodating cavity (12) is further arranged in the shell (1), the accommodating cavity (12) is located on one side of a negative pressure air suction channel (11), a blade driving assembly (7) is arranged in the accommodating cavity (12), and the blade driving assembly (7) is connected with the blade assembly (2).

7. The trimmer head of claim 6, wherein: shell (1) is including holding hand portion (13) and installation department (14), blade subassembly (2) adjust separation blade (3) adjustment mechanism (4) with blade drive assembly (7) all are located in installation department (14), holding hand portion (13) with form contained angle alpha between installation department (14), contained angle alpha's value range is between 130 to 170.

8. The trimmer head of claim 7, wherein: the housing (1) is manufactured by injection molding.

9. A thread trimmer system is characterized in that: the wire cutting machine tool bit comprises a tool bit (200), a negative pressure suction fan (9), a photoelectric sensor (20), a controller (30) and an automatic oil pumping lubricating system, wherein the tool bit (200) is the tool bit of the wire cutting machine according to any one of claims 1 to 8, an air outlet of a negative pressure suction channel (11) of the tool bit (200) is connected with the negative pressure suction fan (9), a motor (71) of the tool bit (200) is electrically connected with the controller (30), the negative pressure suction fan (9) is electrically connected with the controller (30), and the controller (30) is used for controlling the start and stop of the motor (71) of the tool bit (200) and the negative pressure suction fan (9);

the photoelectric sensor (20) is positioned on one side of the cutter head (200), and the photoelectric sensor (20) is electrically connected with the controller (30);

the automatic oil pumping and lubricating system is electrically connected with the controller (30) and is used for providing lubricating oil for the blade assembly (2) of the cutter head (200).

10. A thread trimmer system according to claim 9 and wherein: automatic pump oil lubricating system includes oil storage cylinder (40), oil pump (50), oil pipe (60) and valve (70), and the one end of oil pipe (60) is connected oil storage cylinder (40), and the other end of oil pipe (60) stretches into shell (1) top of tool bit (200), and the oil-out of oil pipe (60) is located blade subassembly (2) next door, and the mid-mounting of oil pipe (60) has oil pump (50) and valve (70).

11. A sewing machine apparatus characterized by: including workstation (80), sewing machine main part (90) and trimming system (100), trimming system (100) is the trimming system of claim 9 or 10, and sewing machine main part (90) is installed on workstation (80), and the tool bit (200) of trimming system (100) sets up the thread end at one side of sewing machine main part (90), and tool bit (200) of trimming system (100) is used for cuting the thread end of the work piece that finishes sewing process through sewing machine main part (90).

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