CN216998827U - Thread trimming and loosening mechanism of sewing machine and sewing machine with same - Google Patents
Thread trimming and loosening mechanism of sewing machine and sewing machine with same Download PDFInfo
- Publication number
- CN216998827U CN216998827U CN202220474368.1U CN202220474368U CN216998827U CN 216998827 U CN216998827 U CN 216998827U CN 202220474368 U CN202220474368 U CN 202220474368U CN 216998827 U CN216998827 U CN 216998827U
- Authority
- CN
- China
- Prior art keywords
- thread
- loosening
- trimming
- cam
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
The utility model discloses a thread trimming and loosening mechanism of a sewing machine, which comprises a motor, a cam device, a thread loosening and trimming assembly, a thread loosening device and a thread trimming device, wherein the cam device is arranged on the motor; the cam device is installed and connected on a motor shaft of the motor, and the thread cutting device is respectively installed and connected with the thread loosening and cutting assembly and the base; the motor converts the rotary motion of the motor into rotary swing of the thread loosening and cutting assembly through the cam device, and the rotary swing of the thread loosening and cutting assembly drives the thread loosening device and the thread cutting device to simultaneously perform thread loosening and thread cutting actions. The cam device and the thread loosening and cutting assembly are designed in a matched mode, the structure is simple, the processing cost is low, the transmission efficiency is high, the controllability is high, and meanwhile the connecting position arranged on the shell is convenient to install, connect, disassemble and maintain in the later period. The utility model also provides a sewing machine adopting the thread cutting and loosening mechanism.
Description
Technical Field
The utility model relates to the technical field of sewing machines, in particular to a thread cutting and loosening mechanism of a sewing machine and the sewing machine with the same.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. During the operation of the sewing machine, thread cutting operation is required, and during the thread cutting operation, the power unit converts the power of the thread cutting unit into thread cutting action of the movable cutter connecting rod assembly through the thread cutting mechanism. The thread trimming and loosening mechanism on the existing sewing machine is complex, high in processing cost and inconvenient to install, and meanwhile, the operation performance is unstable, and later-stage dismounting and maintenance are inconvenient.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a thread cutting and loosening mechanism for a sewing machine.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a thread cutting and loosening mechanism of a sewing machine comprises a motor, a cam device, a thread loosening and shearing assembly, a thread loosening device and a thread cutting device, wherein the motor is installed on a shell of the sewing machine; the cam device is installed and connected on a motor shaft of the motor, the thread loosening and cutting assembly is respectively installed and connected with the cam device and a sewing machine shell, the thread loosening device is respectively installed and connected with the thread loosening and cutting assembly and the sewing machine shell, and the thread cutting device is respectively installed and connected with the thread loosening and cutting assembly and the machine base;
in the thread trimming and thread releasing mechanism of the sewing machine, the motor converts the rotary motion of the motor into the rotary swing of the thread trimming loosening assembly through the cam device, the rotary swing of the thread trimming loosening assembly drives the thread trimming loosening device and the thread trimming device to simultaneously perform thread loosening and thread trimming executing actions, and the thread trimming device is provided with the reset torsion spring for resetting the thread trimming loosening assembly.
In foretell trimming thread loosening mechanism of sewing machine, cam device includes the cam and installs the cam roller on the cam, and cam fixed mounting is on the motor shaft of motor, and the cam roller is installed on the cam and is formed corresponding with the thread loosening and trimming subassembly and support and lean on, and the motor drives the cam rotation, carries out rotatory swing work through cam roller top action thread loosening and trimming subassembly.
In the thread trimming and loosening mechanism of the sewing machine, the thread loosening and trimming assembly comprises a thread loosening and trimming crank, a thread trimming connecting rod and a thread loosening seat, the thread loosening and trimming crank is rotatably hinged with the machine shell, the end part of the thread trimming connecting rod is rotatably connected with the thread loosening and trimming crank through a thread trimming shaft position screw nut, and the thread loosening seat is fixed on the thread loosening and trimming crank through a thread loosening screw; the thread cutting crank rotates and swings through the jacking motion of the cam roller, so that the thread loosening device and the thread cutting device which are connected are respectively driven to simultaneously perform thread loosening and thread cutting actions.
In the thread trimming and releasing mechanism of the sewing machine, the thread releasing device comprises a steel wire rope, a thread releasing frame and a thread releasing device, the thread releasing frame is rotatably hinged to the machine shell through a lever thread pin and a clamp spring, the thread releasing device is installed and connected to the machine shell, and two ends of the steel wire rope are respectively and fixedly connected with the thread releasing seat and the thread releasing frame; the thread loosening shear crank drives the thread loosening base to synchronously rotate, so that the thread loosening frame connected with the thread loosening shear is driven to rotate through the steel wire rope, and the thread loosening frame is provided with an ejector rod capable of ejecting the thread loosening device along with rotation of the thread loosening frame.
In the thread trimming and loosening mechanism of the sewing machine, the thread trimming device comprises a thread trimming crank, a thread trimming shaft, a movable knife crank and a movable knife connecting rod assembly, the thread trimming crank and the movable knife crank are respectively and fixedly connected to two ends of the thread trimming shaft, the reset torsion spring is arranged on the thread trimming shaft, the thread trimming crank is rotatably connected with the end part of the thread trimming connecting rod through a thread trimming shaft position screw nut, and the movable knife crank is connected with the movable knife connecting rod assembly; the thread cutting shaft is driven to rotate by the swinging of the thread loosening and cutting crank through the thread cutting connecting rod, so that the movable cutter connecting rod assembly is driven to cut threads through the movable cutter crank.
In the thread trimming and loosening mechanism of the sewing machine, the cam is provided with the roller connecting branch end, and the cam roller is installed and connected to the roller connecting branch end through the cam shaft and the nut.
In the thread trimming and loosening mechanism of the sewing machine, the thread loosening and loosening assembly further comprises a thread trimming fixing seat which is fixedly connected to the machine shell, and the thread loosening and shearing crank is rotatably hinged to the thread trimming fixing seat through a thread loosening and shearing shaft position screw nut.
The utility model also provides a sewing machine which comprises the thread cutting and loosening mechanism.
The utility model has the beneficial effects that:
the cam device and the thread loosening and cutting assembly are matched to efficiently convert the rotary motion of the motor into synchronous thread loosening and cutting work of the thread loosening device and the thread cutting device; the cam device and the thread loosening and cutting assembly are simple in structure in matched design, processing cost is low, transmission efficiency is high, controllability is high, and meanwhile, installation and connection and later-stage dismounting and maintenance are facilitated at the connecting position of the cam device and the thread loosening and cutting assembly.
Drawings
FIG. 1 is an exploded view of the thread trimming and releasing mechanism of the present invention;
FIG. 2 is a perspective view of the thread cutting and releasing mechanism of the present invention;
FIG. 3 is a perspective view of a thread releasing and cutting assembly of the thread releasing and cutting mechanism of the present invention;
FIG. 4 is a perspective view of a sewing machine employing a thread cutting and loosening mechanism according to the present invention.
Detailed Description
The utility model is further elucidated with reference to the drawing.
Referring to fig. 1 to 3, the present invention provides a thread cutting and loosening mechanism of a sewing machine, including a motor 2 mounted on a sewing machine housing 1, further including a cam device 3, a thread loosening and cutting assembly 4, a thread loosening device 5, and a thread cutting device 6; the motor 2 converts the rotary motion of the motor into rotary swing of the thread loosening and cutting assembly 4 through the cam device 3, and the rotary swing of the thread loosening and cutting assembly 4 respectively drives the thread loosening device 5 and the thread cutting device 6 to simultaneously perform thread loosening and thread cutting actions; and a reset torsion spring (4-1) for resetting the thread loosening and cutting assembly (4) during working is arranged on the thread cutting device (6).
The cam device 3 comprises a cam 7 and a cam roller 8 arranged on the cam 7, the cam 7 is fixedly arranged on a motor shaft of the motor 2, the cam 7 is provided with a roller connecting branch end 9, and the cam roller 8 is connected to the roller connecting branch end 9 through a cam shaft 8-1 and a nut 8-2, so that the cam roller 8 is arranged on the cam 7 and forms corresponding abutting with the thread loosening and cutting assembly 4; the cam 7 rotates synchronously along with the rotation of the motor 2, and the cam roller 8 on the cam 7 pushes the thread loosening and cutting assembly 4, so that the thread loosening and cutting assembly 4 respectively drives the thread loosening device 5 and the thread cutting device 6 connected with the same to perform thread loosening and thread cutting actions simultaneously.
The thread loosening and cutting assembly 4 comprises a thread loosening and cutting crank 10, a thread loosening connecting rod 11 and a thread loosening seat 12, the thread loosening and cutting assembly 4 further comprises a thread loosening and cutting fixing seat 13, the thread loosening and cutting fixing seat 13 is fixedly connected to the machine shell 1, the thread loosening and cutting crank 10 is rotatably hinged to the thread loosening and cutting fixing seat 13 through a thread loosening and cutting axial position screw nut 10-1, the end portion of the thread loosening connecting rod 11 is rotatably connected with the thread loosening and cutting crank 10 through a thread loosening axial position screw nut 11-1, and the thread loosening seat 12 is fixed to the thread loosening and cutting crank 10 through a thread loosening screw 12-1; the cam roller 8 is acted on the loosening and shearing crank 10 to make the loosening and shearing crank rotate and swing, and the rotation and swing of the loosening and shearing crank 10 respectively drives the connected thread shearing device 6 to perform thread shearing action.
The thread cutting device 6 comprises a thread cutting crank 14, a thread cutting shaft 15, a movable knife crank 16 and a movable knife connecting rod assembly 17, the thread cutting crank 14 and the movable knife crank 16 are respectively and fixedly connected to two ends of the thread cutting shaft 15, the reset torsion spring 4-1 is arranged on the thread cutting shaft 15 and is abutted against other components on the sewing machine, the thread cutting crank 14 is rotatably connected with the end part of the thread cutting connecting rod 11 through a thread cutting shaft position screw nut 14-1, and the movable knife crank 16 is connected with the movable knife connecting rod assembly 17; the cam roller 8 is acted on the wire cutting crank 14 to jack and make the wire cutting crank rotate and swing, so that the wire cutting connecting rod 11 drives the wire cutting shaft 15 to rotate, and the rotating of the wire cutting shaft 15 drives the movable knife connecting rod component 17 to cut wires through the movable knife crank 16 at the end part of the wire cutting shaft; the reset torsion spring 4-1 on the thread cutting shaft 15 can generate reset torsion in the rotating process of the thread cutting shaft 15, and after thread cutting is finished, the thread cutting shaft 15 and the thread cutting connecting rod 11 act on the thread loosening and shearing crank 10, so that the thread loosening and shearing crank 10 is reset.
The thread releasing device 5 comprises a steel wire rope 18, a thread releasing frame 19 and a thread releasing device 20, the thread releasing frame 19 is rotatably hinged to the machine shell 1 through a lever threaded pin 19-1 and a clamp spring 19-2, the thread releasing device 20 is installed and connected to the machine shell 1, two ends of the steel wire rope 18 are fixedly connected with the thread releasing seat 12 and the thread releasing frame 19 respectively, and an ejector rod 21 capable of ejecting the thread releasing device 20 along with rotation of the thread releasing frame 19 is arranged on the thread releasing frame 19; the cam roller 8 is acted on the thread trimming crank 14 to rotate and swing, so that the thread loosening crank 10 drives the thread loosening base 12 to synchronously rotate, the rotation of the thread loosening base 12 can pull the steel wire rope 18, the connected thread loosening frame 19 is pulled through the steel wire rope 18, the ejector rod 21 on the thread loosening frame 19 is used for jacking the thread loosening device 20, and the thread loosening device 20 is matched with the movable knife connecting rod assembly 17 to perform thread trimming operation and loosen threads.
As shown in FIG. 4, the utility model also provides a sewing machine, which adopts the thread cutting and loosening mechanism.
The thread cutting and loosening mechanism of the sewing machine and the sewing machine with the thread cutting and loosening mechanism are described in detail, a specific example is applied to explain the principle and the implementation mode of the utility model, and the description of the embodiment is only used for helping to understand the technical scheme disclosed by the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The utility model provides a trimming thread loosening mechanism of sewing machine, is including installing motor (2) on sewing machine casing (1), its characterized in that: the thread releasing and cutting device comprises a cam device (3), a thread releasing and cutting assembly (4), a thread releasing device (5) and a thread cutting device (6); the cam device (3) is installed and connected on a motor shaft of the motor (2), the thread loosening and cutting assembly (4) is installed and connected with the cam device (3) and the sewing machine shell (1) respectively, the thread loosening device (5) is installed and connected with the thread loosening and cutting assembly (4) and the sewing machine shell (1) respectively, and the thread cutting device (6) is installed and connected with the thread loosening and cutting assembly (4) and the machine base (1-1) respectively;
the rotary motion of the motor (2) is converted into rotary swing of the thread loosening and cutting assembly (4) through the cam device (3), the rotary swing of the thread loosening and cutting assembly (4) respectively drives the thread loosening device (5) and the thread cutting device (6) to simultaneously perform thread loosening and thread cutting execution actions, and the thread cutting device (6) is provided with a reset torsion spring (4-1) for resetting the thread loosening and cutting assembly (4).
2. The thread trimming and releasing mechanism of a sewing machine according to claim 1, wherein: cam gear (3) include cam (7) and install cam roller (8) on cam (7), cam (7) fixed mounting is on the motor shaft of motor (2), and cam roller (8) are installed on cam (7) and are formed to correspond with pine trimming subassembly (4) and lean on, and motor (2) drive cam (7) rotate, push up through cam roller (8) and move pine trimming subassembly (4) and carry out swing work.
3. The thread trimming and releasing mechanism of a sewing machine according to claim 2, wherein: the thread loosening and trimming assembly (4) comprises a thread loosening and trimming crank (10), a thread trimming connecting rod (11) and a thread loosening seat (12), the thread loosening and trimming crank (10) is rotatably hinged to the shell (1), the end part of the thread trimming connecting rod (11) is rotatably connected with the thread loosening and trimming crank (10) through a thread trimming shaft position screw nut (14-1), and the thread loosening seat (12) is fixed on the thread loosening and trimming crank (10) through a thread loosening screw (12-1); the thread loosening and shearing crank (10) rotates and swings through jacking of the cam roller (8), so that the thread loosening device (5) and the thread shearing device (6) which are connected are respectively driven to simultaneously perform thread loosening and thread shearing actions.
4. The thread trimming and releasing mechanism of a sewing machine according to claim 3, wherein: the thread loosening device (5) comprises a steel wire rope (18), a thread loosening frame (19) and a thread loosening device (20), the thread loosening frame (19) is rotatably hinged to the machine shell (1) through a lever threaded pin (19-1) and a clamp spring (19-2), the thread loosening device (20) is installed and connected to the machine shell (1), and two ends of the steel wire rope (18) are fixedly connected with the thread loosening seat (12) and the thread loosening frame (19) respectively; the thread loosening and shearing crank (10) drives the thread loosening base (12) to synchronously rotate, so that the connected thread loosening frame (19) is driven to rotate through the steel wire rope (18), and an ejector rod (21) capable of ejecting the thread loosening device (20) along with the rotation of the thread loosening frame (19) is arranged on the thread loosening frame.
5. The thread trimming and releasing mechanism of a sewing machine according to claim 3, wherein: the trimming device (6) comprises a trimming crank (14), a trimming shaft (15), a movable knife crank (16) and a movable knife connecting rod assembly (17), the trimming crank (14) and the movable knife crank (16) are respectively and fixedly connected to two ends of the trimming shaft (15), the reset torsion spring (4-1) is arranged on the trimming shaft (15), the trimming crank (14) is rotatably connected with the end part of the trimming connecting rod (11) through a trimming shaft position screw nut (14-1), and the movable knife crank (16) is connected with the movable knife connecting rod assembly (17); the thread loosening and shearing crank (10) swings to drive the thread shearing shaft (15) to rotate through the thread shearing connecting rod (11), and therefore the movable knife crank (16) drives the movable knife connecting rod assembly (17) to conduct thread shearing work.
6. The thread trimming and releasing mechanism of a sewing machine according to claim 2, wherein: the cam (7) is provided with a roller connecting branch end (9), and the cam roller (8) is installed and connected on the roller connecting branch end (9) through a cam shaft (8-1) and a nut (8-2).
7. The thread trimming and releasing mechanism of a sewing machine according to claim 3, wherein: the pine thread trimming assembly (4) further comprises a thread trimming fixing seat (13), the thread trimming fixing seat (13) is fixedly connected to the machine shell (1), and the pine thread trimming crank (10) is rotatably hinged to the thread trimming fixing seat (13) through a pine thread trimming shaft position screw nut (8-2).
8. A sewing machine characterized by: a thread cutting and loosening mechanism including a sewing machine according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220474368.1U CN216998827U (en) | 2022-03-07 | 2022-03-07 | Thread trimming and loosening mechanism of sewing machine and sewing machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220474368.1U CN216998827U (en) | 2022-03-07 | 2022-03-07 | Thread trimming and loosening mechanism of sewing machine and sewing machine with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216998827U true CN216998827U (en) | 2022-07-19 |
Family
ID=82368464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220474368.1U Active CN216998827U (en) | 2022-03-07 | 2022-03-07 | Thread trimming and loosening mechanism of sewing machine and sewing machine with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216998827U (en) |
-
2022
- 2022-03-07 CN CN202220474368.1U patent/CN216998827U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216998827U (en) | Thread trimming and loosening mechanism of sewing machine and sewing machine with same | |
| CN106894175B (en) | automatic thread trimming mechanism of sewing machine and sewing machine | |
| CN2723092Y (en) | Tooth grinder for electric saw blade | |
| CN210262277U (en) | Automatic thread trimming and presser foot lifting device | |
| WO2022135161A1 (en) | Thread trimming mechanism of sewing machine | |
| CN213925309U (en) | Backstitch and forward sewing adjusting device and sewing machine | |
| CN201347494Y (en) | Air-actuated foot lifter and line cutting device of blind stitching machine | |
| CN208714171U (en) | A kind of automatic cutting bed automatic tool changer | |
| CN208183272U (en) | Cutting facility and sewing machine | |
| CN214992285U (en) | Thread trimming and presser foot lifting driving device and sewing machine | |
| CN217174035U (en) | Thread cutting driving structure of sewing machine | |
| CN216765238U (en) | Presser foot lifting mechanism of sewing machine and sewing machine with same | |
| CN217809974U (en) | Driving mechanism of splicing and sewing machine | |
| CN212426390U (en) | Thread cutting mechanism of sewing machine | |
| CN2844170Y (en) | Automatic wire cutter of arm-style sewing machine | |
| CN218225691U (en) | ATC automatic tool changing structure | |
| CN215289231U (en) | Thread cutting driving assembly of sewing machine | |
| CN113026233B (en) | Device for realizing multifunctional driving by single motor and sewing machine | |
| CN217600999U (en) | Motor-driven thread trimming mechanism of sewing machine | |
| CN212270404U (en) | Thread cutting mechanism of sewing machine | |
| CN215668449U (en) | Sewing machine lifts presser foot, trimming, three in one actuating mechanism and sewing machine of pine | |
| CN110184756B (en) | Automatic thread trimming and presser foot lifting device | |
| CN211420517U (en) | Presser foot mechanism is lifted to sewing machine's trimming | |
| CN215659966U (en) | Electric drill with adjustable angle | |
| CN216074301U (en) | Thread cutting mechanism of sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |