CN112376177A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CN112376177A CN112376177A CN202011285165.XA CN202011285165A CN112376177A CN 112376177 A CN112376177 A CN 112376177A CN 202011285165 A CN202011285165 A CN 202011285165A CN 112376177 A CN112376177 A CN 112376177A
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- CN
- China
- Prior art keywords
- presser foot
- backstitch
- thread trimming
- wheel
- sewing machine
- 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.)
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
- D05B69/12—Electrical or electromagnetic drives using rotary electric motors
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/14—Devices for changing speed or for reversing direction of rotation
- D05B69/16—Devices for changing speed or for reversing direction of rotation mechanical
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/20—Control devices responsive to the number of stitches made
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The application provides a sewing machine, concretely relates to sewing machine makes technical field. The stitch length adjusting mechanism is characterized in that a main shaft of the driving source is provided with a backstitch driving wheel and a presser foot thread trimming driving wheel, the backstitch driving wheel rotates in a backstitch needle length adjusting corner of the driving source, and the presser foot thread trimming driving wheel performs presser foot lifting action and thread trimming action in the presser foot thread trimming lifting corner of the driving source. The application realizes that a plurality of sewing actions are executed by utilizing one power source by utilizing one driving source to execute the adjustment of the back stitching needle distance, the presser foot lifting action and the thread cutting action, so that the driving source fully exerts the running efficiency thereof, realizes the programmed control of each sewing action and has the characteristic of high efficiency.
Description
Technical Field
The application provides a sewing machine, concretely relates to sewing machine makes technical field.
Background
The sewing machine on the existing market generally adopts a stepping motor to control a swing seat so as to realize the needle pitch adjustment, meanwhile, the sewing machine respectively controls the actions of lifting a presser foot and cutting threads through the stepping motor or an electromagnet, the configuration of a plurality of power devices causes the power utilization rate of the whole sewing machine to be reduced, the manufacturing and assembly of the sewing machine are complicated, and the cost of the whole sewing machine is increased. The operation of a plurality of driving sources also increases the heat dissipation capacity of the sewing machine, and shortens the service life of the electric control of the sewing machine for a long time. Aiming at the technical defects, a sewing machine which uses a stepping motor to control the needle pitch adjustment, the presser foot and the thread trimming is developed so as to improve the working efficiency of the whole machine and reduce the manufacturing cost.
Disclosure of Invention
The sewing machine is characterized in that a main shaft of the driving source is provided with a backstitch driving wheel and a presser foot thread trimming driving wheel, the backstitch driving wheel rotates in a backstitch needle distance adjusting corner of the driving source, and the presser foot thread trimming driving wheel performs presser foot lifting and thread trimming at a presser foot thread trimming lifting corner of the driving source. The driving source is used for simultaneously driving the backstitch driving wheel and the presser foot thread trimming driving wheel, so that the sewing machine is more reasonable in design, the manufacturing cost is greatly reduced, and the mechanical transmission efficiency is greatly improved.
Preferably, the adjustment corner of the backstitch stitch length is not overlapped with the corner of the presser foot lifting trimming, and the adjustment corner of the backstitch stitch length is not overlapped with the corner of the presser foot lifting trimming, so that the actions driven by a driving source are not interfered with each other, the ordered execution of the sewing actions is realized, and the program control of the sewing machine is facilitated.
Preferably, the reverse stitching driving wheel is provided with an action wheel at the eccentric position, the action wheel abuts against a reverse stitching action surface of the reverse stitching driving wheel, and the reverse stitching driving wheel is hinged with the swinging seat.
Preferably, an upper connecting rod is arranged between the swinging seat and the backstitch swinging fork wheel, a hinge is arranged between the connecting rod and the backstitch swinging fork wheel, and a hinge is arranged between the connecting rod and the swinging seat.
Preferably, the backstitch swinging fork wheel is further provided with a swinging shaft sleeve, the swinging shaft sleeve is a swinging fulcrum of the backstitch swinging fork wheel, the swinging shaft sleeve is movably connected with a fixed shaft, and the fixed shaft is fixed on the sewing machine.
Preferably, the backstitch swinging fork wheel has a presser foot shearing acting surface and a backstitch acting surface, the backstitch driving wheel has an acting wheel, and when the acting wheel idles between a first idle surface and a second idle surface in the backstitch swinging fork wheel, the presser foot thread trimming driving wheel performs presser foot lifting action and thread trimming action at a presser foot thread lifting and trimming rotation angle of the driving source. The idle setting can not influence each sewing action.
Preferably, the backstitch driving wheel directly acts on the thread trimming cam and the presser foot cam under the driving of the driving source.
Preferably, the presser foot trimming driving wheel presses the presser foot trimming crank to enable the presser foot trimming rotating shaft to rotate, the fixed trimming cam and the presser foot lifting cam are installed on the other side of the presser foot trimming rotating shaft and are also twisted along with the presser foot trimming rotating shaft, the twisted trimming cam and the presser foot cam respectively apply thrust to the presser foot lifting connecting rod and the trimming connecting rod, and the presser foot lifting connecting rod and the trimming connecting rod push the tail end of the presser foot to be lifted to be executed and the tail end of the trimming to be executed.
Preferably, the main shaft is only provided with a backstitch swinging fork wheel, and the driving source drives the backstitch swinging fork wheel to perform backstitch needle distance adjusting action.
Preferably, the thread trimming cam and the presser foot cam are fixed on the presser foot thread trimming rotating shaft, or the thread trimming cam is installed on the presser foot thread trimming rotating shaft, or the presser foot lifting cam is installed on the presser foot thread trimming rotating shaft.
Compared with the prior art, the beneficial effects of this application are: the application realizes that a plurality of sewing actions are executed by utilizing one power source by utilizing one driving source to execute the adjustment of the back stitching needle distance, the presser foot lifting action and the thread cutting action, so that the driving source fully exerts the running efficiency thereof, realizes the programmed control of each sewing action and has the characteristic of high efficiency. The assembly efficiency is improved in the aspect of manufacturing, and the failure rate of the complete machine driving source is relatively reduced due to the fact that only one power source is adopted, so that the complete machine performance of the sewing machine is improved.
Drawings
FIG. 1 is a construction view of a sewing machine of the present application;
FIG. 2 is a schematic view of a backstitch stitch length adjusting mechanism, a presser foot lifting mechanism and a thread trimming mechanism of a sewing machine according to the present application;
FIG. 3 is a schematic view of a backstitch stitch length adjustment mechanism of a sewing machine according to the present application;
fig. 4 is a schematic diagram of a presser foot lifting mechanism and a thread trimming mechanism of the sewing machine according to the present application.
The reference numbers are as follows: the sewing machine comprises a driving source 10, a main shaft 11, a backstitch driving wheel 21, an action wheel 211, a backstitch swinging fork wheel 22, a first idle surface 221, a second idle surface 222, a swinging shaft sleeve 223, a backstitch rotating surface 224, a swinging seat 23, a feeding shaft 24, a connecting rod 25, a fixed shaft 26, a presser foot thread trimming driving wheel 30, a presser foot thread trimming crank 31, a presser foot thread trimming rotating shaft 32, a presser foot lifting connecting rod 33, a presser foot lifting cam 34, a presser foot lifting tail end execution 35, a thread trimming connecting rod 36, a thread trimming cam 37, a thread trimming tail end execution 38 and an elastic element 4.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, is provided to enable those skilled in the art to more readily understand the advantages and features of the present application, and is intended to more clearly and distinctly define the scope of the invention, which is set forth by way of illustration only and is not intended to be limiting of the invention.
Example one
In the drawings, a sewing machine of the present application has a driving source 10, and a backstitch stitch length adjusting mechanism, a presser foot lifting mechanism and a thread trimming mechanism, wherein the driving source 10 performs backstitch stitch length adjustment, presser foot lifting action and thread trimming action at different time periods, and a main shaft 11 of the driving source 10 is controlled by the sewing machine to sequentially perform the backstitch stitch length adjusting action of the backstitch stitch length adjusting mechanism, the thread trimming action of the thread trimming mechanism and the presser foot lifting action of the presser foot lifting mechanism. The driving source 10 is a shaft rotation power device, and the present embodiment specifically selects a motor as the driving source.
This application scheme adopts a driving source 10 to control the backstitch needle distance at different time quantums and adjusts the action, lift presser foot action and thread trimming action, fully embodies the sewing machine of this application and has higher transmission efficiency, compares with prior art and has reduced sewing machine's manufacturing cost by a wide margin, and sewing machine has higher power utilization efficiency. The backstitch driving wheel 21 and the presser foot and thread trimming driving wheel 30 are mounted on the main shaft 11 of the driving source 10, and as another embodiment, the backstitch driving wheel 21 and the presser foot and thread trimming driving wheel 30 may be mounted at both ends of the main shaft 11 of the driving source 10, so that the same technical effects are obtained.
The backstitch needle pitch adjusting mechanism comprises a driving source 10, a backstitch driving wheel 21, a backstitch swinging fork wheel 22, a swinging seat 23, a feeding shaft 24, a connecting rod 25 and a fixing shaft 26, wherein the backstitch swinging fork wheel 22 is provided with a swinging shaft sleeve 223, a first idle surface 221 and a second idle surface 222. The driving source 10 first drives the reverse stitch driving wheel 21 to perform the reverse stitch pitch adjustment operation. The driving source 10 rotates within the backstitch needle distance adjusting angle of the sewing machine, so that the backstitch driving wheel 21 generates a swinging source for the backstitch swinging fork wheel 22 to the swinging seat 23, and the backstitch needle distance adjusting action is realized. When the backstitch stitch length adjusting operation is performed, the driving source 10 drives the backstitch driving wheel 21 and the presser foot thread trimming driving wheel 30 at the same time, the driving source 10 drives the backstitch driving wheel 21 to enable the backstitch swinging fork wheel 22 to generate a swinging source, and the swinging source received by the presser foot thread trimming driving wheel 30 does not have a substantial effect of performing the presser foot and thread trimming operation on the presser foot lifting cam 34 and the thread trimming cam 37. That is, since the presser foot cam 34 and the thread trimming cam 37 which are rotated back and forth by the driving source 10 are swung in an idle stroke, the presser foot lifting mechanism and the thread trimming mechanism do not perform an actual operation when the main shaft 11 performs the back stitch pitch adjusting operation.
The operation of the backstitch gauge adjusting mechanism will be described in detail below. The backstitch swinging fork wheel 22 has a first idle surface 221 and a second idle surface 222, and the backstitch driving wheel 21 has an action wheel 211. The driving source 10 drives the reverse sewing drive wheel 21, the action wheel 211 forms a swing source against the reverse sewing rotation surface 224, and the reverse sewing swing fork wheel 22 swings left and right at the original position of the action wheel 211. A hinge is arranged between the backstitch swinging fork wheel 22 and the swinging seat 23, the backstitch swinging fork wheel 22 swinging left and right transmits a swinging source to the swinging seat 23, and the swinging seat 23 transmits the swinging source to the feeding shaft 24 to implement backstitch needle distance adjustment. The backstitch swinging fork wheel 22 further comprises a swinging shaft sleeve 223, the swinging shaft sleeve 223 is a swinging fulcrum of the backstitch swinging fork wheel 22, the swinging shaft sleeve 223 is movably connected with the fixed shaft 26, and the fixed shaft 26 is fixed on the sewing machine.
The present embodiment also adds a connecting member between the backstitch swinging fork 22 and the swinging seat 23, that is, a connecting rod 25 is provided between the swinging seat 23 and the backstitch swinging fork 22. The connecting rod 25 is hinged to the backstitch swinging fork wheel 22, and the connecting rod 25 is hinged to the swinging seat 23.
After the driving source 10 performs the adjustment of the backstitch stitch length in the backstitch stitch length adjustment corner, the driving source 10 enters the presser foot lifting and trimming corner to perform the presser foot lifting and trimming actions, and the backstitch driving wheel 21 directly acts on the presser foot cam 34 and the trimming cam 37 under the driving of the driving source 10, so that the presser foot lifting and trimming actions are realized. In the other scheme of the embodiment, the presser foot lifting action and the thread trimming action are implemented by arranging the presser foot thread trimming rotating shaft 32, the driving source 10 before entering the presser foot thread trimming rotating angle drives the backstitch swinging fork wheel 22 to swing, and simultaneously drives the backstitch driving wheel 21 to rotate, and the swinging sources of all parts transmitted to the presser foot lifting mechanism and the thread trimming mechanism are not enough to generate substantial thrust on the thread trimming cam 37 and the presser foot cam 34, and the thrust is not enough actually. The reason for this is that the action wheel 211 provided at the eccentric position of the back stitch drive 21 is located at a position where the drive source 10 enters the main shaft 11 as a center. When the drive source 10 drives the presser foot thread trimming driving wheel 30 to rotate, the action wheel 211 idles between the first idle surface 221 and the second idle surface 222 in the backstitch swinging fork wheel 22. Therefore, the adjustment of the backstitch stitch distance does not affect the presser foot lifting action and the thread cutting action, the adjustment corner of the backstitch stitch distance is not overlapped with the thread cutting corner of the presser foot lifting action, and the adjustment of the backstitch stitch distance is not affected at all during the presser foot lifting action and the thread cutting action.
When the driving source 10 drives the presser foot trimming driving wheel 30 to swing at the backstitch stitch adjusting rotation angle, the presser foot trimming driving wheel 30 presses the presser foot trimming crank 31 to enable the presser foot trimming rotating shaft 32 to rotate, the fixed trimming cam 37 and the presser foot lifting cam 34 which are arranged on the other side of the presser foot trimming rotating shaft 32 are also twisted with the presser foot trimming driving wheel, the twisted trimming cam 37 and the presser foot cam 34 respectively apply thrust to the presser foot lifting connecting rod 33 and the trimming connecting rod 36, so that the presser foot lifting connecting rod 33 and the trimming connecting rod 36 push the presser foot lifting tail end execution 35 and the trimming tail end execution 38, and the presser foot lifting action and the trimming action are implemented. The presser foot thread trimming rotating shaft 32 is further provided with an elastic part 4, and the elastic part 4 is used for resetting the presser foot thread trimming rotating shaft 32 after being pressed by the presser foot thread trimming driving wheel 30.
Example two
The present embodiment is substantially the same as the first embodiment, except that the main shaft 11 is only provided with the backstitch swinging fork wheel 22, and the driving source 10 drives the backstitch swinging fork wheel 22 to perform the backstitch needle pitch adjusting action.
EXAMPLE III
The present embodiment is substantially the same as the first embodiment, except that the presser foot thread trimming rotating shaft 32 is only provided with a thread trimming cam 37, and the driving source 10 drives the presser foot thread trimming driving wheel 30 and performs the presser foot lifting action through the thread trimming cam 37.
Example four
The present embodiment is substantially the same as the first embodiment, except that the presser foot trimming rotating shaft 32 is only provided with a presser foot lifting cam 34, and the driving source 10 drives the presser foot trimming driving wheel 30 and performs the trimming operation by lifting the presser foot cam 34.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A sewing machine is provided with a driving source (10), wherein the driving source (10) executes a backstitch needle distance adjusting mechanism, a presser foot lifting mechanism and a thread trimming mechanism at different time intervals, and is characterized in that a backstitch driving wheel (21) and a presser foot thread trimming driving wheel (30) are installed on a main shaft (11) of the driving source (10), the backstitch driving wheel (21) rotates in a backstitch needle distance adjusting corner of the driving source (10), and the presser foot thread trimming driving wheel (30) executes a presser foot lifting action and a thread trimming action in a presser foot thread trimming lifting corner of the driving source (10).
2. The sewing machine of claim 1, wherein the backstitch stitch length adjustment corner does not overlap the presser foot lift trim corner.
3. A machine according to claim 1, characterized in that said backtacking wheel (21) has an action wheel (211) in an eccentric position, said action wheel (211) abutting against a backtacking rotation surface (224) provided by the backtacking wheel (21), the backtacking wheel (21) being hinged to the oscillating seat (23).
4. Sewing machine as in claim 3, characterized in that between said oscillating seat (23) and said backstitch oscillating fork wheel (22) there is arranged an upper connecting rod (25), between said connecting rod (25) and said backstitch oscillating fork wheel (22) there is a hinge arrangement, between said connecting rod (25) and said oscillating seat (23).
5. The sewing machine of claim 1, wherein the backstitch oscillating fork wheel (22) further comprises an oscillating sleeve (223), the oscillating sleeve (223) is an oscillating fulcrum of the backstitch oscillating fork wheel (22), the oscillating sleeve (223) is movably connected with the fixed shaft (26), and the fixed shaft (26) is fixed on the sewing machine.
6. The sewing machine according to claim 1, wherein the backstitch swing fork wheel (22) has a first idle surface (221) and a second idle surface (222), the backstitch driving wheel (21) has an action wheel (211), and the presser foot thread trimming driving wheel (30) performs the presser foot lifting action and the thread trimming action at the presser foot thread lifting and trimming rotation angle of the driving source (10) when the action wheel (211) idles between the first idle surface (221) and the second idle surface (222) inside the backstitch swing fork wheel (22).
7. A sewing machine according to claim 1, wherein the backstitch drive (21) is driven by the drive source (10) to act directly on the thread trimming cam (37) and the presser foot cam (34).
8. The sewing machine according to claim 1 or 7, characterized in that the presser foot thread trimming driving wheel (30) presses the presser foot thread trimming crank (31) to rotate the presser foot thread trimming rotating shaft (32), the fixed thread trimming cam (37) and the presser foot lifting cam (34) are arranged on the other side of the presser foot thread trimming rotating shaft (32) and are also twisted along with the presser foot thread trimming rotating shaft, the twisted thread trimming cam (37) and the presser foot cam (34) respectively apply thrust to the presser foot lifting connecting rod (33) and the thread trimming connecting rod (36), and the presser foot lifting connecting rod (33) and the thread trimming connecting rod (36) push the presser foot end lifting actuating piece (35) and the thread trimming end actuating piece (38).
9. A sewing machine according to claim 1, wherein the main shaft (11) is provided with only the backstitch swinging fork (22), and the driving source (10) drives the backstitch swinging fork (22) to perform the backstitch needle pitch adjustment operation.
10. The sewing machine of claim 7, wherein the thread trimming cam (37) and the presser foot cam (34) are fixed to the presser foot thread trimming rotating shaft (32) in one of the following manners:
a. the presser foot thread trimming rotating shaft (32) is provided with a thread trimming cam (37);
b. and a presser foot lifting cam (34) is arranged on the presser foot trimming rotating shaft (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011285165.XA CN112376177A (en) | 2020-11-17 | 2020-11-17 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011285165.XA CN112376177A (en) | 2020-11-17 | 2020-11-17 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112376177A true CN112376177A (en) | 2021-02-19 |
Family
ID=74584954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011285165.XA Pending CN112376177A (en) | 2020-11-17 | 2020-11-17 | Sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112376177A (en) |
-
2020
- 2020-11-17 CN CN202011285165.XA patent/CN112376177A/en active Pending
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