CN216338304U - Thread trimming and presser foot lifting mechanism and sewing machine with same - Google Patents
Thread trimming and presser foot lifting mechanism and sewing machine with same Download PDFInfo
- Publication number
- CN216338304U CN216338304U CN202122561339.7U CN202122561339U CN216338304U CN 216338304 U CN216338304 U CN 216338304U CN 202122561339 U CN202122561339 U CN 202122561339U CN 216338304 U CN216338304 U CN 216338304U
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- presser foot
- lever
- thread trimming
- connecting rod
- swing part
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- 238000009966 trimming Methods 0.000 title claims abstract description 46
- 238000009958 sewing Methods 0.000 title claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000010008 shearing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Sewing Machines And Sewing (AREA)
Abstract
The utility model relates to the technical field of sewing equipment, and discloses a thread trimming and presser foot lifting mechanism and a sewing machine with the same, wherein the thread trimming and presser foot lifting mechanism comprises a driving motor, a presser foot lifting assembly and a thread trimming assembly, wherein the presser foot lifting assembly and the thread trimming assembly are driven by the driving motor to act; the presser foot long lever is connected with the machine body at one end and can rotate on the machine body, a lower bushing is arranged at one end of the presser foot long lever, the lower bushing is arranged on the rear side of the presser foot long lever through a first shaft position screw, and the presser foot long lever is connected with the presser foot lifting assembly; still include connecting rod and last bush, go up the upper end of bush and lever goods of furniture for display rather than for use and offset, go up the bush and install in the one end of connecting rod through axle position screw three, the other end and the trimming subassembly of connecting rod are connected. The utility model simplifies the driving structure and the driving mode of the presser foot lifting component and the thread trimming component.
Description
Technical Field
The utility model relates to the technical field of sewing equipment, in particular to a thread cutting and presser foot lifting mechanism and a sewing machine with the same.
Background
The existing sewing machine's presser foot lifting and thread trimming device is split, and is driven by electromagnet or cylinder alone, and the input signal is many, and the control degree of difficulty is big, and the structure is complicated, and the installation degree of difficulty is big, and is with high costs. For example, the Chinese utility model patent (application No. CN201120549101.6) discloses a pneumatic type presser foot lifting and trimming driving structure on a overedger, a presser foot lifting cylinder and a trimming cylinder are respectively fixed on the left side and the right side of the rear part of the overedger, wherein a piston at the lower end of the presser foot lifting cylinder is in threaded connection with a presser foot lifting connecting rod, the right end of a presser foot lifting lever is hinged on a casing of the overedger, the lower end of a hook is hooked on one side of the presser foot lifting lever close to the right end, the upper end of the hook is connected with a small presser foot lifting lever, the small presser foot lifting lever is connected with a presser foot shaft, and the presser foot shaft is connected with a presser foot arm; the lower end of the thread trimming cylinder is provided with a thread trimming lever, one end of the thread trimming lever is provided with a thread trimming connecting rod, the other end of the thread trimming lever is fixed at one end of the cutter shaft, the thread trimming connecting rod is in threaded connection with a piston of the thread trimming cylinder, and the other end of the cutter shaft is provided with a thread trimming cutter. The two cylinders in the above patent drive the equipment cost and the cylinders themselves also affect the functional life.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a thread cutting and presser foot lifting mechanism and a sewing machine with the same.
In order to solve the technical problem, the utility model is solved by the following technical scheme:
a thread trimming and presser foot lifting mechanism comprises a driving motor, a presser foot lifting assembly, a thread trimming assembly, a driving wheel and a lever swing part, wherein the presser foot lifting assembly and the thread trimming assembly are driven by the driving motor to act;
the presser foot long lever is connected with the machine body at one end and can rotate on the machine body, a lower bushing is arranged at one end of the presser foot long lever, the lower bushing is arranged on the rear side of the presser foot long lever through a first shaft position screw, the lower bushing abuts against the lower end of the lever swing part, and the presser foot long lever is connected with the presser foot lifting assembly;
still include connecting rod and last bush, go up the upper end of bush and lever goods of furniture for display rather than for use and offset, go up the bush and install in the one end of connecting rod through axle position screw three, the other end and the trimming subassembly of connecting rod are connected.
Preferably, still include hold-in range and synchronizing wheel, the drive wheel passes through the hold-in range and drives the synchronizing wheel and rotate, and the lever goods of furniture for display rather than for use passes through the fix with screw and sets up in the rear side of synchronizing wheel and with synchronizing wheel synchronous revolution.
Preferably, the lever swing part comprises an upper swing part and a lower swing part, an included angle smaller than 90 degrees is formed between the upper swing part and the lower swing part, the upper side of the upper swing part abuts against the upper bushing, and the lower side of the lower swing part abuts against the lower bushing.
Preferably, the device further comprises a presser foot small lever and a presser foot shaft, wherein one end of the presser foot small lever is fixedly sleeved on the presser foot shaft and drives the presser foot shaft to rotate, the presser foot long lever drives the presser foot small lever to rotate through a hook connecting rod, the upper end of the hook connecting rod is connected with the other end of the presser foot small lever, and the lower end of the hook connecting rod is connected with the middle part of the presser foot long lever.
Preferably, the device further comprises a presser foot arm and a swing rod, the lower end of the swing rod is connected with the presser foot shaft and synchronously rotates with the presser foot shaft, the upper end of the swing rod is connected with one end of the presser foot arm, and the other end of the presser foot arm is connected with the presser foot lifting assembly.
A sewing machine comprises the thread cutting and presser foot lifting mechanism.
Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that:
1. when the driving motor rotates forwards, the driving motor drives the lever swing part to swing downwards through the driving wheel, the lever swing part presses the lower bushing downwards, the presser foot long lever swings downwards, and therefore the presser foot lifting assembly is driven to lift the presser foot.
2. When the driving motor rotates reversely, the driving motor drives the lever swinging part to swing upwards through the driving wheel, the lever swinging part jacks up the upper bushing to enable the connecting rod to swing upwards, and therefore the wire shearing assembly is driven to do wire shearing action.
3. The swing direction of the lever swing part is driven by one driving motor to respectively drive the presser foot lifting component and the thread trimming component to act, so that the driving structure and the driving mode of the presser foot lifting component and the thread trimming component are simplified, and the mounting space inside the sewing machine is saved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion M in fig. 1.
Fig. 3 is a partially enlarged schematic view of the portion N in fig. 1.
The names of the parts indicated by the numerical references in the drawings are as follows: 1-driving motor, 2-pressure foot lifting component, 3-thread trimming component, 4-driving wheel, 5-lever swing part, 6-motor shaft, 7-machine body, 8-pressure foot long lever, 9-lower bushing, 10-axial position screw I, 11-axial position screw II, 12-torsion spring I, 13-connecting rod, 14-upper bushing, 15-axial position screw III, 16-torsion spring II, 17-synchronous belt, 18-synchronous wheel, 19-screw, 20-pressure foot small lever, 21-pressure foot shaft, 22-torsion spring III, 23-positioning block, 24-pressure foot arm, 25-swinging rod, 26-upper swinging part, 27-lower swinging part and 28-hook connecting rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
A thread trimming and presser foot lifting mechanism is shown in figures 1 to 3 and comprises a driving motor 1, a presser foot lifting assembly 2 and a thread trimming assembly 3, wherein the driving motor 1 is inserted into a machine body 7 and is vertically arranged in the machine body 7, the presser foot lifting assembly 2 and the thread trimming assembly 3 are driven by the driving motor 1 to act, the thread trimming mechanism also comprises a driving wheel 4 and a lever swing part 5, the driving wheel 4 is fixedly sleeved on a motor shaft 6 of the driving motor 1 and synchronously rotates with the motor shaft 6, and the driving wheel 4 is connected with the lever swing part 5 and drives the lever swing part 5 to rotate;
the presser foot long lever mechanism further comprises a presser foot long lever 8, one end of the presser foot long lever 8 is connected with the machine body 7 and can rotate on the machine body 7, a lower bushing 9 is arranged at one end of the presser foot long lever 8, the lower bushing 9 is installed on the rear side of the presser foot long lever 8 through a first shaft position screw 10, the lower bushing 9 abuts against the lower end of the lever swing part 5, and the presser foot long lever 8 is connected with the presser foot lifting assembly 2; one end of the presser foot long lever 8 is arranged on the machine body 7 through a second shaft position screw 11, so that the rotation flexibility and stability of the presser foot long lever 8 are improved. The axial position screw II 11 is sleeved with a first torsion spring 12, one end of the first torsion spring 12 abuts against the lower end of the presser foot long lever 8, and the other end of the first torsion spring 12 is connected with the machine body 7, so that the presser foot long lever 8 can conveniently reset upwards after rotating downwards, and the convenience in action of the presser foot long lever 8 is improved.
Still include connecting rod 13 and last bush 14, go up bush 14 and the upper end of lever goods of furniture for display rather than for use 5 and offset, go up bush 14 and install in the one end of connecting rod 13 through axle position three 15 screws, the other end and the trimming subassembly 3 of connecting rod 13 are connected, the epaxial cover that connecting rod 13 and trimming subassembly 3 are connected is equipped with second torsion spring 16, the one end and the connecting rod 13 of second torsion spring 16 are connected, the other end and the organism 7 of second torsion spring 16 offset, second torsion spring 16 is used for connecting rod 13 to rotate the back downwards again, improves the precision of connecting rod 13 action. When the driving motor 1 rotates forwards, the driving motor 1 drives the lever swing part 5 to swing downwards through the driving wheel 4, the lever swing part 5 presses the lower bushing 9 downwards, the presser foot long lever 8 swings downwards, and the presser foot lifting assembly 2 is driven to lift the presser foot. When the driving motor 1 rotates reversely, the driving motor 1 drives the lever swing part 5 to swing upwards through the driving wheel 4, the lever swing part 5 jacks up the upper bushing 14 upwards, the connecting rod 13 swings upwards, and the thread trimming assembly 3 is driven to perform thread trimming. The swing direction of the lever swing part 5 is driven by the driving motor 1 to respectively drive the presser foot lifting component 2 and the thread cutting component 3 to act, so that the driving structure and the driving mode of the presser foot lifting component 2 and the thread cutting component 3 are simplified, and the mounting space inside the sewing machine is saved.
Still include hold-in range 17 and synchronizing wheel 18, drive wheel 4 passes through hold-in range 17 and drives synchronizing wheel 18 and rotate, and lever pendulum 5 sets up in the rear side of synchronizing wheel 18 and with synchronizing wheel 18 synchronous revolution through screw 19 fixedly. The driving wheel 4 rotates synchronously with the synchronizing wheel 18 through the synchronous belt 17, so that the synchronizing wheel 18 drives the lever swing part 5 to swing, the driving motor 1 and the lever swing part 5 are convenient to install in a matched mode, and the driving motor 1 is guaranteed to drive the lever swing part 5 to swing in precision and stability.
The presser foot mechanism further comprises a presser foot small lever 20 and a presser foot shaft 21, one end of the presser foot small lever 20 is fixedly sleeved on the presser foot shaft 21 and drives the presser foot shaft 21 to rotate, the presser foot long lever 8 drives the presser foot small lever 20 to rotate through a hook connecting rod 28, the upper end of the hook connecting rod 28 is connected with the other end of the presser foot small lever 20, and the lower end of the hook connecting rod 28 is connected with the middle part of the presser foot long lever 8. When the presser foot long lever 8 swings, the presser foot small lever 20 is driven to swing synchronously through the hook connecting rod 28, then the presser foot small lever 20 drives the presser foot shaft 21 to rotate, and the presser foot shaft 21 controls the presser foot lifting assembly 2 to lift the presser foot. The presser foot shaft 21 is sleeved with a third torsion spring 22, one end of the third torsion spring 22 abuts against the lower end of the presser foot small lever 20, the other end of the third torsion spring 22 abuts against the machine body 7, and the third torsion spring 22 is used for upward resetting of the presser foot small lever 20. Still the cover is equipped with locating piece 23 on the presser foot axle 21, and presser foot small lever 20 is located between locating piece 23 and the third 22 of torsional spring, and when presser foot axle 21 resets corresponding position, locating piece 23 offsets with organism 7, and locating piece 23 is used for limiting presser foot axle 21 pivoted angle that resets, excessive rotation when avoiding presser foot axle 21 to reset, causes the damage to other spare parts.
The device further comprises a presser foot arm 24 and a swing rod 25, the lower end of the swing rod 25 is connected with the presser foot shaft 21 and synchronously rotates with the presser foot shaft 21, the upper end of the swing rod 25 is connected with one end of the presser foot arm 24, and the other end of the presser foot arm 24 is connected with the presser foot lifting assembly 2. The lower end of the swing rod 25 is sleeved at one end of the presser foot shaft 21, the presser foot shaft 21 drives the swing rod 25 to synchronously rotate when rotating, so that the swing rod 25 rotates towards the direction far away from the presser foot arm 24, the end of the presser foot arm 24 far away from the swing rod 25 is upwards lifted, the presser foot lifting component 2 is positioned at the other end of the presser foot arm 24 and upwards lifted along with the other end of the presser foot arm 24, and the presser foot lifting action is completed.
Example 2
A thread trimming and presser foot lifting mechanism, as shown in fig. 1 to 3, a lever swing member 5 of embodiment 1 includes an upper swing portion 26 and a lower swing portion 27, and an included angle of less than 90 degrees is formed between the upper swing portion 26 and the lower swing portion 27, so that the internal structure is more compact, the manufacturing cost of parts of the lever swing member 5 is reduced, and the flexibility and stability of the cooperation of the upper swing portion 26 and the lower swing portion 27 with an upper bushing 14 and a lower bushing 9, respectively, are improved. The upper side of the skirt 26 abuts against the upper bush 14, and the lower side of the skirt 27 abuts against the lower bush 9. When the thread trimming assembly 3 works, the lever swing part 5 is driven by the synchronous wheel 18 to rotate upwards, the upper swinging part 26 jacks the upper bushing 14 upwards, and the connecting rod 13 is pushed to swing upwards; when the presser foot lifting assembly 2 works, the lever swing part 5 is driven by the synchronizing wheel 18 to rotate downwards, the lower swinging part 27 presses the lower bushing 9 downwards, and the presser foot long lever 8 swings downwards. The swing of the lever swing part 5 is convenient to respectively drive the actions of the thread trimming component 3 and the presser foot lifting component 2.
Example 3
A sewing machine, as shown in figures 1 to 3, comprising a thread trimming and presser foot lifting mechanism as described above.
Claims (6)
1. The utility model provides a trimming and lift presser foot mechanism, includes driving motor (1), lifts presser foot subassembly (2) and trimming subassembly (3) and moves its characterized in that by driving motor (1) drive: the driving wheel (4) is fixedly sleeved on a motor shaft (6) of the driving motor (1) and rotates synchronously with the motor shaft (6), and the driving wheel (4) is connected with the lever swing part (5) and drives the lever swing part (5) to rotate;
the presser foot long lever mechanism is characterized by further comprising a presser foot long lever (8) with one end connected with the machine body (7) and capable of rotating on the machine body (7), a lower bushing (9) is arranged at one end of the presser foot long lever (8), the lower bushing (9) is installed on the rear side of the presser foot long lever (8) through a first axial position screw (10), the lower bushing (9) abuts against the lower end of the lever swing part (5), and the presser foot long lever (8) is connected with the presser foot lifting assembly (2);
the upper end of the lever swing part (5) is abutted against the upper end of the connecting rod (13) and the upper bushing (14), the upper bushing (14) is installed at one end of the connecting rod (13) through a shaft position screw III (15), and the other end of the connecting rod (13) is connected with the trimming assembly (3).
2. A thread trimming and presser foot lifting mechanism according to claim 1, wherein: still include hold-in range (17) and synchronizing wheel (18), drive wheel (4) drive synchronizing wheel (18) through hold-in range (17) and rotate, and lever goods of furniture for display rather than for use (5) set up in the rear side of synchronizing wheel (18) and with synchronizing wheel (18) synchronous revolution through screw (19) fixedly.
3. A thread trimming and presser foot lifting mechanism according to claim 1, wherein: the lever swing part (5) comprises an upper swing part (26) and a lower swing part (27), an included angle smaller than 90 degrees is formed between the upper swing part (26) and the lower swing part (27), the upper side of the upper swing part (26) is abutted against the upper bushing (14), and the lower side of the lower swing part (27) is abutted against the lower bushing (9).
4. A thread trimming and presser foot lifting mechanism according to claim 1, wherein: the presser foot mechanism is characterized by further comprising a presser foot small lever (20) and a presser foot shaft (21), wherein one end of the presser foot small lever (20) is fixedly sleeved on the presser foot shaft (21) and drives the presser foot shaft (21) to rotate, the presser foot long lever (8) drives the presser foot small lever (20) to rotate through a hook connecting rod (28), the upper end of the hook connecting rod (28) is connected with the other end of the presser foot small lever (20), and the lower end of the hook connecting rod (28) is connected with the middle of the presser foot long lever (8).
5. A thread trimming and presser foot lifting mechanism according to claim 4, wherein: the device is characterized by further comprising a presser foot arm (24) and a swing rod (25), wherein the lower end of the swing rod (25) is connected with the presser foot shaft (21) and rotates synchronously with the presser foot shaft (21), the upper end of the swing rod (25) is connected with one end of the presser foot arm (24), and the other end of the presser foot arm (24) is connected with the presser foot lifting assembly (2).
6. A sewing machine characterized by: comprising a thread trimming and presser foot lifting mechanism as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122561339.7U CN216338304U (en) | 2021-10-22 | 2021-10-22 | Thread trimming and presser foot lifting mechanism and sewing machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122561339.7U CN216338304U (en) | 2021-10-22 | 2021-10-22 | Thread trimming and presser foot lifting mechanism and sewing machine with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216338304U true CN216338304U (en) | 2022-04-19 |
Family
ID=81181318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122561339.7U Expired - Fee Related CN216338304U (en) | 2021-10-22 | 2021-10-22 | Thread trimming and presser foot lifting mechanism and sewing machine with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216338304U (en) |
-
2021
- 2021-10-22 CN CN202122561339.7U patent/CN216338304U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220419 |