CN214736593U

CN214736593U - Sewing machine

Info

Publication number: CN214736593U
Application number: CN202120942137.4U
Authority: CN
Inventors: 朱义潜
Original assignee: Zhejiang Hulong Technology Co ltd
Current assignee: Zhejiang Hulong Technology Co ltd
Priority date: 2021-05-04
Filing date: 2021-05-04
Publication date: 2021-11-16
Anticipated expiration: 2031-05-04

Abstract

The utility model belongs to the technical field of sewing machine, refer in particular to a sewing machine, which comprises a housing, reverse and forward sewing mechanism, trimming mechanism, main shaft and spindle motor, the main shaft passes through the lower transmission subassembly and is connected with the lower transmission, trimming mechanism includes the tangent line crank, and the cover is at epaxial tangent line cam of lower, reverse and forward sewing mechanism includes driving motor, swing seat and work feed shaft, the epaxial cover of work feed is equipped with crank assembly one and crank assembly two, be connected through linkage assembly transmission between crank assembly one and the tangent line crank, drive motor continues to rotate through swing seat drive work feed shaft behind the biggest gauge needle in the same direction as the seam, and then crank assembly two drive crank assembly one rotate and drive the tangent line crank through the linkage assembly and make axial translation. The utility model discloses with the work feed axle of the mechanism of sewing up and down as the power supply of drive trimming drive assembly, effectively reduced product cost, optimize the installation space in the sewing machine, reduce sewing machine overall structure.

Description

Sewing machine

The technical field is as follows:

the utility model belongs to the technical field of sewing equipment, refer in particular to a sewing machine.

Background art:

at present, a backward and forward sewing mechanism on a sewing machine generally needs a driving source to drive and adjust the position angle of a swing seat so as to adjust the swing amplitude of an upper shaft driving a cloth feeding shaft through a connecting rod component, and further achieve the purpose of adjusting backward and forward sewing and needle pitch. The automatic thread trimming mechanism on the sewing machine drives the movable cutter frame to rotate by the driving source and then realizes thread trimming action under the matching of the movable cutter frame and the fixed cutter.

The sewing machine disclosed in the Chinese invention patent application (application publication No. CN 111648053A, application date: 2020.07.02) comprises a main shaft, a tooth frame, feeding teeth arranged on the tooth frame, and a feeding mechanism connected between the main shaft and the tooth frame, wherein the feeding mechanism is internally provided with a feeding swing seat capable of rotating around a first fixed swing fulcrum, the angle of the feeding swing seat determines the needle pitch of the sewing machine, and the sewing machine further comprises a driving motor and a needle pitch adjusting power transmission mechanism connected between an output shaft of the driving motor and the feeding swing seat, and the needle pitch adjusting power transmission mechanism enables power transmission between the driving motor and the feeding swing seat to be continuously realized.

Meanwhile, the invention patent (No. CN 106894175B; published Japanese patent No. 2020.01.31) discloses an automatic thread trimming mechanism of a sewing machine and the sewing machine, which comprises a lower shaft which is rotatably supported in a bottom plate of the sewing machine, a thread trimming driving cam which is fixed on the lower shaft, and a movable cutter component which can swing around the lower shaft, wherein the movable cutter component comprises at least one movable cutter, a movable cutter holder which is used for installing the movable cutter, a crankshaft which is parallel to the lower shaft, a thread trimming driving component which is installed at one end of the crankshaft, a thread trimming crank which is fixed at the other end of the crankshaft, and a thread trimming connecting rod, the thread trimming driving component is provided with a first extension arm, the end part of the first extension arm is connected with a roller, two ends of the thread trimming connecting rod are respectively hinged with the thread trimming crank and the movable cutter holder, when in thread trimming, an electromagnet drives the thread trimming driving component to move along the axial direction of the crankshaft through a transmission mechanism, the roller is matched with the contact surface of the trimming line.

Therefore, the backward and forward sewing mechanism and the automatic thread trimming driving assembly are driven by respective driving sources, the occupied space is large, the overall structure of the sewing machine is bulkier, and meanwhile, the cost of the product is higher.

The invention content is as follows:

the utility model aims at providing a sewing machine, it regards the work feed axle as the power supply of drive trimming drive assembly to reach single motor drive reverse and in the same direction as sewing mechanism and trimming drive assembly's purpose.

The utility model discloses a realize like this:

a sewing machine comprises a machine shell, a backward and forward sewing mechanism, a thread cutting mechanism, a main shaft and a main shaft motor, wherein the main shaft is in transmission connection with a lower shaft through a lower shaft transmission assembly, the thread cutting mechanism comprises a thread cutting crank and a thread cutting cam sleeved on the lower shaft, the thread cutting crank can axially translate and is linked or separated with the thread cutting cam, the backward and forward sewing mechanism comprises a driving motor, a swinging seat and a cloth feeding shaft, the cloth feeding shaft is sleeved with a first crank component and a second crank component, the first crank component and the cloth feeding shaft rotate relatively, the second crank component and the cloth feeding shaft rotate synchronously, and the crank component II can drive the crank component I to rotate, the crank component I is in transmission connection with the tangent crank through the linkage component, the driving motor continues to drive the cloth feeding shaft to rotate through the swinging seat after the maximum needle pitch is sewed, and then the crank component II drives the crank component I to rotate and drives the tangent crank to axially translate through the linkage component.

In the sewing machine, the inner end of the crank assembly II is fixedly sleeved on the cloth feeding shaft, the outer end of the crank assembly II is provided with the contact piece, and the contact piece can be abutted against the crank assembly I and pushes the crank assembly to rotate one by one.

In the sewing machine, the contact part is a roller or a screw or a convex column integrated with the crank assembly II.

In the sewing machine, the cloth feeding shaft on the first crank assembly, which is away from the two sides of the first crank assembly, is sleeved with the locking ring, and a limiting space for axially limiting the first crank assembly is formed between the locking ring and the second crank assembly.

In the sewing machine, the sewing machine further comprises a presser foot lifting mechanism and a rear lever which is rotatably connected to the machine shell, the rear end of the rear lever is linked with the presser foot lifting mechanism, the front end of the rear lever is intermittently linked with the swinging seat through a presser foot lifting driving assembly, and the driving motor continues to drive the swinging seat to swing after backstitch is carried out to the maximum needle pitch, so that the rear lever is driven to rotate through the presser foot lifting driving assembly.

In the sewing machine, the presser foot lifting driving assembly comprises a driving plate rotatably connected to the machine shell, a rear lever fork opening is formed in the front end of the rear lever, the outer end of the driving plate is slidably connected to the rear lever fork opening, a pressing plate is arranged on the swinging seat, the driving plate is hinged to the upper end of the driving rod, and the lower end of the driving rod is a free end and can be abutted to the pressing plate.

In foretell sewing machine, thread trimming mechanism is still including tangent line crank axle, tangent line crank suit is on tangent line crank axle, the linkage subassembly is including setting up the gyro wheel on crank subassembly one, and the gyro wheel is contradicted and is connected the tangent line crank axle and be close to the articulate terminal surface border department of switching, is provided with reset spring between tangent line crank axle and the casing, drives the gyro wheel by crank subassembly one and rotates, overcome reset spring's elastic force towards tangent line cam direction axial translation with the promotion tangent line crank axle.

In the sewing machine, the thread releasing mechanism and the thread releasing steel rope with the connecting end fixed on the thread releasing mechanism are further included, the thread releasing plate is fixed on the tangent crank shaft, the driving end of the thread releasing steel rope is fixed on the thread releasing plate, and the thread releasing mechanism is axially translated by the tangent crank shaft and pulled by the thread releasing steel rope to release threads.

Compared with the prior art, the utility model outstanding advantage is:

1. the utility model takes the cloth feeding shaft of the forward and backward sewing mechanism as the power source for driving the thread cutting driving assembly, so as to achieve the purpose of driving the forward and backward sewing mechanism and the thread cutting driving assembly by a single motor, effectively reduce the product cost, optimize the installation space in the sewing machine and reduce the overall structure of the sewing machine;

2. the utility model discloses cloth feeding shaft among the reversing sewing machine constructs still will be as the power supply of drive thread loosening mechanism, and the power supply of presser foot mechanism is lifted as the drive to the swing seat for driving motor only need drive swing seat drive cloth feeding shaft the rotation, can realize reversing sewing, lift presser foot, trimming and thread loosening four functions, the more apparent reduction the product the cost, reduce work procedure, improve work efficiency, make sewing machine's operation simpler, convenient, swift.

Description of the drawings:

FIG. 1 is a perspective view of the overall structure of the present invention;

fig. 2 is a schematic view of the overall structure of the present invention.

In the figure: 1. a main shaft; 2. a spindle motor; 3. a lower shaft; 4. a tangent crank; 5. a tangent cam; 6. a drive motor; 7. a swing seat; 8. a cloth feeding shaft; 9. a first crank assembly; 10. a crank assembly II; 11. a roller; 12. a locking ring; 13. a rear lever; 14. a drive plate; 15. a rear lever fork port; 16. lifting the pressing plate; 17. a drive rod; 18. a tangent crankshaft; 19. a roller; 20. a return spring; 21. a loose wire steel rope; 22. a loose wire plate; 23. a crank assembly.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1-2:

a sewing machine comprises a machine shell, a backward and forward sewing mechanism, a thread trimming mechanism, a main shaft 1 and a main shaft motor 2, wherein the main shaft 1 is in transmission connection with a lower shaft 3 through a lower shaft 3 transmission component, in the embodiment, the lower shaft 3 transmission component adopts a vertical rotating shaft component in the prior art, namely, a vertical rotating shaft is vertically and rotatably connected in the machine shell, a driving bevel gear and a driven bevel gear are respectively sleeved on the main shaft 1 and the lower shaft 3, and the upper end and the lower end of the vertical rotating shaft are respectively sleeved with a transmission bevel gear meshed with the corresponding bevel gears.

Meanwhile, the thread cutting mechanism and the backward and forward sewing mechanism both adopt the existing structures, namely the thread cutting mechanism comprises a thread cutting crank 4 and a thread cutting cam 5 sleeved on a lower shaft 3, the thread cutting crank 4 can axially translate and is linked or separated from the thread cutting cam 5, the lower shaft 3 drives the thread cutting cam 5 to rotate under the drive of an upper shaft, and when the thread cutting crank 4 is combined with the thread cutting cam 5, the thread cutting crank 4 drives a tool rest linked with the thread cutting crank 4 to rotate under the drive of the thread cutting cam 5, so that the thread cutting function is realized;

the backward and forward sewing mechanism comprises a driving motor 6, a swing seat 7 and a cloth feeding shaft 8, the cloth feeding shaft 8 is connected with an upper shaft through a cloth feeding connecting rod assembly, the upper shaft drives the cloth feeding shaft 8 to swing through the cloth feeding connecting rod assembly, an output shaft of the driving motor 6 is in transmission connection with the swing seat 7 through an eccentric wheel or a crank assembly 23, and when the control box controls the driving motor 6 to rotate clockwise or anticlockwise, the driving motor 6 drives the swing seat 7 to swing up and down through the eccentric wheel or the crank assembly 23 so as to achieve the purpose of backward and forward sewing.

The utility model discloses a can reach single motor drive backward and forward sewing mechanism and trimming drive assembly's purpose to effectively reduce the cost of product, reduce the working procedure, improve work efficiency, the cover is equipped with crank assembly one 9 and crank assembly two 10 on the work feed shaft 8, and crank assembly one 9 and work feed shaft 8 are relative rotation, crank assembly two 10 and work feed shaft 8 are synchronous rotation, and crank assembly two 10 can drive crank assembly one 9 and rotate, is connected through the linkage subassembly transmission between crank assembly one 9 and the tangent line crank 4, and in the same direction as seam to the biggest gauge needle back driving motor 6 continue to rotate through swing seat 7 drive work feed shaft 8, and then crank assembly two 10 drive crank assembly one 9 and rotate and drive tangent line crank 4 through the linkage subassembly and do axial translation.

Wherein, the specific connection structure that crank assembly two 10 can drive crank assembly one 9 rotations is: the inner end of the second crank assembly 10 is fixedly sleeved on the cloth feeding shaft 8, the outer end of the second crank assembly is provided with a contact part, and the contact part can be abutted against the first crank assembly 9 and pushes the first crank assembly 9 to rotate together. Meanwhile, the abutting element is a roller 11 or a screw or a convex column integrated with the second crank assembly 10, and in this embodiment, the abutting element is a roller 11 rotatably connected to the second crank assembly 10.

In addition, in order to axially fix the first crank assembly 9 on the cloth feeding shaft 8, a locking ring 12 is sleeved on the cloth feeding shaft 8 on the side, away from the second crank assembly 10, of the first crank assembly 9, and a limiting space for axially limiting the first crank assembly 9 is formed between the locking ring 12 and the second crank assembly 10.

Further, in order to make the utility model discloses a driving motor 6 can also drive and lift presser foot mechanism and do and lift the presser foot action, still including lifting presser foot mechanism, and rotate the back lever 13 of connecting on the casing, the rear end of back lever 13 with lift presser foot mechanism linkage, the front end is through lifting presser foot drive assembly and swing seat 7 intermittent type linkage, backstitch continues the swing of drive swing seat 7 to the biggest gauge needle back driving motor 6, and then drives back lever 13 through lifting presser foot drive assembly and rotate, be about to the swing seat 7 in the backstitch mechanism as the power supply that the presser foot mechanism was lifted in the drive.

Furthermore, the pressure foot lifting driving assembly may adopt a conventional structure, and in this embodiment, the pressure foot lifting driving assembly includes a driving plate 14 rotatably connected to the housing, a rear lever fork 15 is opened at a front end of the rear lever 13, an outer end of the driving plate 14 is slidably connected to the rear lever fork 15, a pressure plate 16 is disposed on the swing seat 7, the driving plate 14 is hinged to an upper end of the driving rod 17, and a lower end of the driving rod 17 is a free end and can abut against the pressure plate 16. After the backstitch reaches the maximum stitch length, the driving motor 6 continues to drive the swing seat 7 to swing, so that the lifting pressing plate 16 on the swing seat 7 abuts against and pushes the driving rod 17 to drive the driving plate 14 and the rear lever 13 to rotate.

In addition, trimming mechanism still includes tangent crank axle 18, tangent crank 4 suit is on tangent crank axle 18, and in this embodiment, in order to make crank assembly 9 can drive tangent crank axle 18 through the linkage subassembly and make axial translation, the linkage subassembly is including setting up gyro wheel 19 on crank assembly 9, and gyro wheel 19 is contradicted to be connected in tangent crank axle 18 and is close to the cranked terminal surface border department of switching, is provided with reset spring 20 between tangent crank axle 18 and the casing, drives gyro wheel 19 by crank assembly 9 and rotates, overcomes reset spring 20's elastic force by pushing tangent crank axle 18 and moves towards tangent cam 5 direction axial translation.

And on the basis of above-mentioned wire cutting mechanism, in order to further reduce the utility model discloses a product cost makes the utility model discloses a work feed axle 8 can also regard as the power supply of drive pine line mechanism, still fixes the pine line steel cable 21 on the pine line mechanism including pine line mechanism and link, be fixed with pine line plate spare 22 on the tangent line bent axle 18, the drive end of pine line steel cable 21 is fixed on pine line plate spare 22, by 18 axial translations of tangent line bent axle, through the pine line steel cable 21 pulling pine line mechanism and do the action of loosing the line.

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

Claims

1. The utility model provides a sewing machine, including the casing, the seam mechanism is in the same direction as falling, trimming mechanism, main shaft (1) and spindle motor (2), main shaft (1) is connected with lower axle (3) transmission through lower axle (3) transmission assembly, trimming mechanism includes tangent line crank (4) and cover tangent line cam (5) on lower axle (3), tangent line crank (4) can axial translation and tangent line cam (5) link mutually or separate, the seam mechanism is in the same direction as falling includes driving motor (6), swing seat (7) and send cloth axle (8), its characterized in that: the cloth feeding device is characterized in that a crank assembly I (9) and a crank assembly II (10) are sleeved on the cloth feeding shaft (8), the crank assembly I (9) and the cloth feeding shaft (8) rotate relatively, the crank assembly II (10) and the cloth feeding shaft (8) rotate synchronously, the crank assembly II (10) can drive the crank assembly I (9) to rotate, the crank assembly I (9) and the tangent crank (4) are connected through a linkage assembly in a transmission mode, a driving motor (6) continues to drive the cloth feeding shaft (8) to rotate through a swinging seat (7) after sewing to the maximum needle pitch, and then the crank assembly II (10) drives the crank assembly I (9) to rotate and drives the tangent crank (4) to axially translate through the linkage assembly.

2. A sewing machine according to claim 1, wherein: the inner end of the second crank assembly (10) is fixedly sleeved on the cloth feeding shaft (8), the outer end of the second crank assembly is provided with a contact part, and the contact part can be abutted against the first crank assembly (9) and pushes the first crank assembly (9) to rotate together.

3. A sewing machine according to claim 2, wherein: the contact part is a roller (11) or a screw or a convex column which is integrated with the crank assembly II (10).

4. A sewing machine according to claim 1, wherein: and a locking ring (12) is sleeved on the cloth feeding shaft (8) which is positioned on the side of the first crank component (9) departing from the second crank component (10), and a limiting space for axially limiting the first crank component (9) is formed between the locking ring (12) and the second crank component (10).

5. A sewing machine according to claim 1, wherein: the sewing machine is characterized by further comprising a presser foot lifting mechanism and a rear lever (13) rotatably connected to the machine shell, wherein the rear end of the rear lever (13) is linked with the presser foot lifting mechanism, the front end of the rear lever is intermittently linked with the swinging seat (7) through a presser foot lifting driving assembly, and the driving motor (6) continues to drive the swinging seat (7) to swing after backstitch is carried out to the maximum needle pitch, so that the rear lever (13) is driven to rotate through the presser foot lifting driving assembly.

6. A sewing machine according to claim 5, wherein: the pressure lifting and pressing foot driving assembly comprises a driving plate (14) which is rotatably connected to the machine shell, a rear lever fork opening (15) is formed in the front end of a rear lever (13), the outer end of the driving plate (14) is connected to the rear lever fork opening (15) in a sliding mode, a pressure lifting plate (16) is arranged on the swinging seat (7), the driving plate (14) is hinged to the upper end of a driving rod (17), and the lower end of the driving rod (17) is a free end and can be abutted to the pressure lifting plate (16).

7. A sewing machine according to claim 1, wherein: trimming mechanism is still including tangent crank axle (18), tangent crank (4) suit is on tangent crank axle (18), the linkage subassembly is including setting up gyro wheel (19) on crank subassembly (9), and gyro wheel (19) are contradicted and are connected tangent crank axle (18) and be close to switching articulate terminal surface border department, are provided with reset spring (20) between tangent crank axle (18) and the casing, drive gyro wheel (19) by crank subassembly (9) and rotate, overcome the elastic force of reset spring (20) towards tangent cam (5) direction axial translation with promotion tangent crank axle (18).

8. A sewing machine according to claim 7, wherein: the thread releasing mechanism is characterized by further comprising a thread releasing mechanism and a thread releasing steel rope (21) with a connecting end fixed on the thread releasing mechanism, a thread releasing plate (22) is fixed on the tangent crank shaft (18), the driving end of the thread releasing steel rope (21) is fixed on the thread releasing plate (22), and the thread releasing mechanism is axially translated by the tangent crank shaft (18) and pulled through the thread releasing steel rope (21) to release threads.