CN112458640B - Single-motor driven device for reversing sewing and lifting presser foot - Google Patents
Single-motor driven device for reversing sewing and lifting presser foot Download PDFInfo
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- CN112458640B CN112458640B CN202011415492.2A CN202011415492A CN112458640B CN 112458640 B CN112458640 B CN 112458640B CN 202011415492 A CN202011415492 A CN 202011415492A CN 112458640 B CN112458640 B CN 112458640B
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- rotating shaft
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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
- D05B69/18—Devices for changing speed or for reversing direction of rotation electric, e.g. foot pedals
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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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- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to the technical field of sewing equipment, in particular to a single motor driven reverse and forward sewing and presser foot lifting device; the driving motor is arranged on the machine shell, a rotating shaft of the driving motor extends into the machine shell, the rotating shaft is connected with a swinging seat of the backward and forward sewing mechanism through a swinging fork assembly or a sliding rod assembly, the rotating shaft is also connected with a rear lever of the presser foot lifting mechanism through a transmission mechanism, the rotating shaft of the driving motor continuously rotates after the forward sewing or the backward sewing reaches the maximum needle pitch, the rear lever is driven by the transmission mechanism to move so as to lift the presser foot, and when the presser foot is lifted, the absolute value of the maximum value of the change of the needle pitch is greater than the maximum absolute value of the effective needle pitch; when the driving motor drives the presser foot lifting, the absolute value of the maximum value of the needle pitch change is larger than the maximum absolute value of the effective needle pitch, the presser foot lifting mechanism is simple and convenient to install and debug, and the correlation between the mechanism for driving the backward and forward sewing and the mechanism for driving the presser foot lifting is weak.
Description
Technical Field
The invention belongs to the technical field of sewing equipment, and particularly relates to a single-motor driven backward and forward sewing and presser foot lifting device.
Background
At present, a swinging seat on a sewing machine is generally driven by a backstitch electromagnet, a backstitch wrench and a gauge wheel disc on a mechanism, when the position of the swinging seat needs to be adjusted, the gauge is adjusted firstly, and then the backstitch wrench or the electromagnet drives the swinging seat through a crank, a connecting rod and the like so as to finally realize the adjustment of the gauge. In order to overcome the defects of manual reverse and forward sewing, an automatic reverse and forward sewing conversion device appears on the market. The automatic presser foot lifting device on the sewing machine is well popularized.
The Chinese patent application (publication No. CN 111648053A, application date: 2020.07.02, application publication date 2020.09.11) discloses a sewing machine, which discloses a structure for switching a presser foot lifting and a backward and forward sewing by a motor drive, and comprises a main shaft, a tooth rack, feeding teeth arranged on the tooth rack, a feeding mechanism connected between the main shaft and the tooth rack, a presser foot, and a presser foot lifting mechanism connected with the presser foot, 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, the sewing machine further comprises a driving motor, a needle pitch adjusting power transmission mechanism connected between an output shaft of the driving motor and the feeding swing seat, and a presser foot lifting transmission mechanism connected between an output shaft of the driving motor and the presser foot lifting mechanism, the needle pitch adjusting power transmission mechanism enables the driving motor and the feeding swing seat to continuously transmit power, an avoidance structure is arranged in the presser foot lifting transmission mechanism; the corner of the output shaft of the driving motor is provided with a needle pitch active adjusting area, a needle pitch passive adjusting area except the needle pitch active adjusting area and a pin lifting area contained in the needle pitch passive adjusting area; when the output shaft of the driving motor operates in the active needle pitch adjusting area, the sewing machine has an effective needle pitch, and the avoiding structure enables the driving motor and the presser foot lifting mechanism to have no power transmission; when the output shaft of the driving motor operates in the presser foot lifting area, the presser foot lifting transmission mechanism enables power transmission between the driving motor and the presser foot lifting mechanism, the needle pitch corresponding to the angle of the feeding swing seat changes, and the absolute value of the needle pitch is not greater than the maximum absolute value of the effective needle pitch.
When the presser foot is lifted and placed, the rotation angle of the output shaft of the driving motor is required to be within the angle range of the effective needle pitch, so that the incidence relation between the presser foot lifting transmission mechanism and the needle pitch adjusting power transmission mechanism is complicated, and the realization is difficult.
Disclosure of Invention
The invention aims to provide a single-motor driven backward and forward sewing and presser foot lifting device which is simple in presser foot lifting mechanism, convenient to install and debug and weak in association between a mechanism for driving the backward and forward sewing and a mechanism for driving the presser foot lifting.
The invention is realized by the following steps: a single motor driven device for reverse and forward sewing and presser foot lifting comprises a machine shell, a driving motor, a reverse and forward sewing mechanism and a presser foot lifting mechanism, the casing is provided with a rotating shaft mounting hole, the driving motor is arranged on the casing, a rotating shaft of the driving motor penetrates through the rotating shaft mounting hole and extends into the casing, the rotating shaft is connected with the swinging seat of the backward and forward sewing mechanism through a swinging fork assembly or a sliding rod assembly, the rotating shaft rotates clockwise or anticlockwise to drive the swinging fork assembly or the sliding rod assembly to drive the swinging seat to swing so as to realize backward and forward sewing switching, the rotating shaft is also connected with a rear lever of the presser foot lifting mechanism through a transmission mechanism, the rotating shaft of the driving motor continuously rotates after the sewing or backstitch is carried out to the maximum stitch length, the rear lever is driven by the transmission mechanism to act so as to lift the presser foot, when the drive motor drives the pressure foot lifting, the absolute value of the maximum value of the needle pitch change is larger than the maximum absolute value of the effective needle pitch.
In the single-motor driven device for sewing and lifting the presser foot, the swing seat is in a U shape and comprises a left support arm, a right support arm and a connecting cross arm, wherein an avoiding groove is formed in the connecting cross arm, and the avoiding groove is formed from the front side surface to the rear side surface of the connecting cross arm and penetrates through the upper plane and the lower plane of the connecting cross arm.
In the single-motor driven forward and backward sewing and presser foot lifting device, the rear side surface of the connecting cross arm extends backwards to form a reinforcing boss.
In the device for driving the backward and forward sewing and the presser foot lifting by the single motor, the swing fork assembly comprises a driving wheel and a swing fork which are arranged on a rotating shaft, one end of the swing fork is provided with a fork opening, the fork opening is inserted on the driving wheel, the other end of the swing fork is connected with the swing seat, the driving wheel is eccentrically arranged on the rotating shaft, and the driving wheel rotates along with the rotating shaft; or: the swing fork assembly comprises a swing fork, a sliding block and a driving wheel, a fork opening is formed in one end of the swing fork, the sliding block is sleeved on the driving wheel, the sliding block is arranged in the fork opening of the swing fork, the other end of the swing fork is connected to a swing seat, the driving wheel is eccentrically arranged on a rotating shaft, and the driving wheel rotates along with the rotating shaft.
In the single-motor driven backward and forward sewing and presser foot lifting device, the slide bar assembly comprises a drive wheel and a swing fork which are arranged on a rotating shaft, a waist-shaped hole is formed in one end of the slide bar, the drive wheel is rotatably arranged in the waist-shaped hole, the other end of the slide bar is connected with a swing seat, the drive wheel is eccentrically arranged on the rotating shaft, and the drive wheel rotates along with the rotating shaft; or: the slide bar subassembly includes slide bar, slider and drive wheel, and the one end of slide bar is provided with waist shape hole, and the slider suit is on the drive wheel, just the slider setting is downthehole at waist shape, and the other end of slide bar is connected on swing seat, the eccentric setting of drive wheel is in the pivot, and the drive wheel rotates along with the pivot.
In the device for driving the backward and forward sewing and the presser foot lifting by the single motor, the driving mechanism comprises a driving cam, the driving cam is connected with an input gear of the gear transmission mechanism through a driving rod, an output gear of the gear transmission mechanism is connected with a rear lever gear, the rear lever gear is a tooth part which is arranged on a rear lever and is in meshing transmission with the output gear, and the rear lever gear is rotatably arranged on the machine shell.
In the above device for driving the backward and forward sewing and the presser foot lifting by the single motor, the gear transmission mechanism comprises a driving gear and a transmission gear which are in meshing transmission, the driving gear is an input gear, the transmission gear is an output gear, and the driving gear and the transmission gear are rotatably installed on the machine shell.
In the single-motor driven backward and forward sewing and presser foot lifting device, the driving mechanism comprises a driving cam, the driving cam is connected with a driving rear lever through a driving rod, one end of the driving rear lever is rotatably installed on the shell, the other end of the driving rear lever is provided with a connecting pin, the rear lever is in a V shape and comprises a first support arm and a second support arm, an assembling hole is formed in the turning position of the rear lever, an open slot is formed in the outer end of the first support arm, the connecting pin is slidably arranged in the open slot, a pull rod connecting hole used for being connected with a pull rod of the presser foot lifting mechanism is formed in the outer end of the second support arm, and the rear lever penetrates through the assembling hole through a screw to be rotatably installed on the shell.
In the single-motor driven forward and backward sewing and presser foot lifting device, the center of the assembling hole is located at the intersection point of the center lines of the first support arm and the second support arm, and the included angle between the center lines of the first support arm and the second support arm is 65-80 degrees.
In the single-motor driven backward and forward sewing and presser foot lifting device, the driving mechanism comprises a driving cam, a driving rear lever and a rear lever, the driving cam is connected with the driving rear lever through a driving rod, the driving rear lever is in a V shape and comprises a third support arm and a fourth support arm, an assembly hole is formed in the turning position of the rear lever, a pull rod connecting hole connected with a pull rod of the presser foot lifting mechanism is formed in the outer end of the fourth support arm, a connecting pin is arranged at the outer end of the third support arm, the driving rear lever penetrates through the assembly hole through a screw and is rotatably installed on the machine shell, one end of the rear lever is rotatably installed on the machine shell, an open slot is formed in the other end of the rear lever, and the connecting pin is slidably arranged in the open slot.
In the single-motor driven backward and forward sewing and presser foot lifting device, the center of the assembling hole is located at the intersection point of the central lines of the third arm and the fourth arm, and the included angle between the central lines of the third arm and the fourth arm is 65-80 degrees.
In the single-motor-driven backward and forward sewing and presser foot lifting device, the device further comprises a limiting frame, a horizontal bending portion is arranged on the limiting frame, a through hole for the driving rod to pass through is formed in the horizontal bending portion, a limiting tight ring is arranged on the driving rod, the lower end of the driving rod penetrates through the through hole to be connected with the driving cam, the limiting tight ring is limited on the horizontal bending portion, and the limiting frame is installed on a sewing machine shell.
In the device for driving the backward and forward sewing and the presser foot lifting by the single motor, a cushion pad is arranged between the limiting tight ring and the horizontal bending part, and the driving rod is arranged on the cushion pad in a penetrating way; or: the buffer pad, the spring and the spring seat are arranged between the limiting tight ring and the horizontal bending part, the driving rod sequentially penetrates through the buffer pad, the spring and the spring seat, the lower end of the spring is arranged on the spring seat, and the upper end of the spring is arranged on the buffer pad.
In the single-motor driven backward and forward sewing and presser foot lifting device, the rotating shaft mounting hole is a backward sewing spanner shaft hole or is obtained based on the backward sewing spanner shaft hole, and oil is sealed between the rotating shaft mounting hole and the rotating shaft through an oil sealing piece.
Compared with the prior art, the invention has the outstanding advantages that: 1. When the driving motor drives the presser foot lifting, the absolute value of the maximum value of the needle pitch change is larger than the maximum absolute value of the effective needle pitch, the presser foot lifting mechanism is simple and convenient to install and debug, and the correlation between the mechanism for driving the backward and forward sewing and the mechanism for driving the presser foot lifting is weak.
2. The presser foot lifting height of the invention can reach more than 13mm, exceeds the industrial standard, can sew fabrics with thicker thickness, and has good thick material adaptability.
Drawings
FIG. 1 is an exploded view of the first embodiment; FIG. 2 is a front view of the first embodiment; FIG. 3 is a side view of the first embodiment; FIG. 4 is a front perspective view of the swing base of the present invention;
FIG. 5 is a rear perspective view of the swing base of the present invention; FIG. 6 is a front view of the second embodiment;
FIG. 7 is an exploded view of the third embodiment; FIG. 8 is an exploded view of the fourth embodiment; FIG. 9 is an exploded view of the fifth embodiment; FIG. 10 is an exploded view of the sixth embodiment; FIG. 11 is an exploded view of the seventh embodiment;
FIG. 12 is a front view of the eighth embodiment; FIG. 13 is a schematic view of a rear lever of the eighth embodiment;
fig. 14 is a front view of the ninth embodiment.
In the figure: 1. a housing; 2. a drive motor; 3. a rotating shaft mounting hole; 4. a rotating shaft; 5. a swing seat; 5a1, left arm; 5a2, right arm; 5a3, connecting cross arm; 5b1, avoiding the groove; 5a4, reinforcing bosses; 6. a drive wheel; 7. a swing fork; 7a1, jaw; 7a2, a stem; 8. a clamp spring; 9. a drive cam; 10. a drive rod; 11. a rear lever gear; 12. a drive gear; 13. a transmission gear; 14. a limiting frame; 15. a through hole; 16. framework oil seal; 17. a side cover; 18. a top rod; 19. a slider; 20. a slide bar; 21. a waist-shaped hole; 22. an annular groove; 23. driving the rear lever; 24. a connecting pin; 25. a first support arm; 26. a second support arm; 27. an open slot; 28. a pull rod connection hole; 29. a third support arm; 30. and a fourth support arm.
Detailed Description
The invention will now be further described by way of specific examples,
the first embodiment is as follows: referring to fig. 1-5: a single motor driven backward and forward sewing mechanism and a presser foot lifting mechanism device comprise a machine shell 1, a driving motor 2, a backward and forward sewing mechanism and a presser foot lifting mechanism, wherein the backward and forward sewing mechanism and the presser foot lifting mechanism are existing mechanisms on a sewing machine, and detailed description is omitted in the embodiment. A rotating shaft mounting hole 3 is arranged on the machine shell 1, the driving motor 2 is arranged on the machine shell 1, a rotating shaft 4 of the driving motor 2 penetrates through the rotating shaft mounting hole 3 and extends into the machine shell 1, the rotating shaft 4 is connected with the swinging seat 5 of the backward and forward sewing mechanism through the swinging fork component, the rotating shaft 4 rotates clockwise or anticlockwise to drive the swinging fork component to drive the swinging seat 5 to swing so as to realize backward and forward sewing switching, the rotating shaft 4 is also connected with a rear lever of the presser foot lifting mechanism through a transmission mechanism, the rotating shaft 4 of the driving motor 2 is driven to rotate continuously after the sewing or backstitch is carried out to the maximum stitch length, the rear lever is driven to act through the transmission mechanism to realize the presser foot lifting, when the drive motor 2 drives the pressure foot lifting, the absolute value of the maximum value of the needle pitch change is larger than the maximum absolute value of the effective needle pitch, the presser foot lifting mechanism is simple, convenient to install and debug, and the mechanism for driving the backward and forward sewing and the mechanism for driving the presser foot lifting are weakly related.
The maximum value of the effective needle pitch here may be a maximum value of a needle pitch of sewing which can be actually set by a user.
Furthermore, the swing seat 5 of the present embodiment is U-shaped, and includes a left arm 5a1, a right arm 5a2, and a connecting cross arm 5a3, wherein the connecting cross arm 5a3 is provided with an avoiding groove 5b1, and the avoiding groove 5b1 is arranged from the front side surface to the rear side surface of the connecting cross arm 5a3, and penetrates through the upper and lower planes of the connecting cross arm 5a 3. The arrangement of the avoiding groove 5b1 can still not interfere with the cloth feeding connecting rod after the effective needle pitch range is exceeded.
Compared with the existing automatic presser foot lifting height of 10+1mm in the market, the presser foot lifting height can reach more than 13mm, exceeds the industrial standard, can be used for sewing fabrics with thicker thickness, and has good thick material adaptability.
Due to the arrangement of the escape groove 5b1, the rear side of the connecting cross arm 5a3 is provided with a reinforcing boss 5a4 extending rearward for increasing the strength.
In the embodiment, the motor 2 is driven to rotate continuously when the backstitch stitch length is maximum, so that the purpose of lifting the presser foot is achieved.
In this embodiment, the swing fork assembly includes a driving wheel 6 and a swing fork 7 mounted on the rotating shaft 4, one end of the swing fork 7 is provided with a fork opening 7a1, the other end is a rod portion 7a2, the fork opening 7a1 is inserted on the driving wheel 6, the other end is connected with the swing base 5, the driving wheel 6 is eccentrically arranged on the rotating shaft 4, and the driving wheel 6 rotates along with the rotating shaft 4.
When the swing fork 7 is connected with the swing seat 5, a swing seat pin shaft is arranged at a corresponding position on the swing seat 5, a mounting hole is formed in the other end of the swing fork 7, and the swing seat pin shaft penetrates through the mounting hole and is positioned through the clamp spring 8.
Wherein, the driving wheel 6 comprises a large diameter end and a small diameter end, the fork opening 7a1 is inserted in the periphery of the small diameter end, and in order to realize axial limit, the end part of the small diameter end is provided with a side cover 17.
The transmission mechanism of the embodiment comprises a driving cam 9, the driving cam 9 is connected with an input gear of a gear transmission mechanism through a driving rod 10, an output gear of the gear transmission mechanism is connected with a rear lever gear 11, the rear lever gear 11 is a tooth part which is arranged on a rear lever and is in meshing transmission with the output gear, and the rear lever gear 11 is rotatably arranged on the machine shell 1.
In this embodiment, the gear transmission mechanism includes a driving gear 12 and a transmission gear 13 for meshing transmission, the driving gear 12 is an input gear, the transmission gear 13 is an output gear, and the driving gear 12 and the transmission gear 13 are directly or indirectly rotatably mounted on the housing 1. When the indirect installation is carried out, the driving gear 12 and the transmission gear 13 are firstly installed on the adapter plate, and then the adapter plate is installed on the machine shell 1.
The upper end of the driving rod 10 is provided with a connector, a threaded hole is formed in the connector, a through hole is axially formed in the driving gear 12, and a screw penetrates through the through hole and is screwed on the connector to achieve connection of the driving rod 10 and the driving gear 12. The up and down motion of the drive rod 10 may pull a clockwise or counterclockwise rotation of the drive gear 12.
When installed, the drive cam 9 is located at the outer end of the rotating shaft 4 of the drive motor 2.
In order to eliminate the idle stroke in the process of lifting the presser foot, the embodiment is further provided with a limiting frame 14, a horizontal bending portion is arranged on the limiting frame 14, a through hole 15 for the lower end of the driving rod 10 to pass through is formed in the horizontal bending portion, a limiting tight ring is arranged on the driving rod 10, the specific position of the limiting tight ring is set according to actual conditions, the lower end of the driving rod 10 passes through the through hole 15 in the limiting frame 14 to be connected with the driving cam 9, the limiting tight ring is limited on the horizontal bending portion, and the limiting frame 14 is installed on the sewing machine shell 1.
In order to reduce noise, the driving rod 10 of the present embodiment is further provided with a buffer pad, and the buffer pad is located between the position-limiting fastening ring and the horizontal bending portion.
In order to increase the buffering, the present embodiment may further add a spring, and the structure is as follows: the drive rod is provided with a spring seat and a spring in a penetrating mode, the lower end of the spring is arranged on the spring seat, and the upper end of the spring is arranged on the buffer pad in a propping mode.
The rotating shaft mounting hole 3 is obtained by a backstitch wrench shaft hole or a backstitch wrench shaft hole, and the backstitch wrench shaft hole is obtained as follows: and (4) reaming or processing into a step hole and the like. The improvement on the machine shell 1 is small, and the machine shell is suitable for being popularized and applied in batches. Oil is sealed between the rotating shaft mounting hole 3 and the rotating shaft 4 through an oil sealing part, and the oil sealing part is preferably a framework oil seal 16 in the embodiment.
In order to reserve the function of manually controlling the lifting of the presser foot by the knee. And the rear lever gear 11 is connected with a mandril 18.
The installation steps of this embodiment are as follows: the cabinet 1 is modified and processed for use. The swinging seat 5 is arranged at the corresponding part of the machine according to the requirement and is replaced with the original swinging seat. The fork opening 7a1 of the swing fork 7 is inserted into the corresponding position of the drive wheel 6, and the side cover 17 is placed on the small diameter end of the drive wheel 6 and locked with a screw. The assembled swing fork assembly is set aside for use. Knocking the framework oil seal 16 into the rotating shaft mounting hole 3 of the machine shell 1, inserting the rotating shaft 4 of the driving motor 2 into the machine shell 1 through the framework oil seal 16, sequentially sleeving the swing fork assembly and the driving cam 9 on the rotating shaft 4 of the driving motor 2 from the inside of the machine shell 1, sleeving the other end of the swing fork 7 on the swing seat pin shaft, and fixing the swing fork assembly and the driving cam by using the clamp spring 8. The driving motor 2 is fixed to the casing 1 with screws. The push rod 18 is connected to the corresponding hole of the rear lever gear 11, and then fixed to the corresponding position of the machine case 1 by the axis screw and the original rear lever of the machine is replaced at the same time. The transmission gear 13 and the driving gear 12 are sequentially arranged at corresponding positions of the machine shell 1 by using an axial screw, the limiting frame 14 is sleeved into the driving rod 10 and then is connected with the driving gear 12 by using the axial screw, and the other end of the driving rod 10 is placed into a groove of the driving cam 9. The drive motor 2 of the present embodiment is a stepping motor. The stepping motor is electrified to search the zero position of the motor, the driving wheel is adjusted to search the mechanical zero position, and the driving wheel 6 is locked by a screw. The machine is run to the backstitch maximum gauge adjustment drive cam 9 position and locked with screws until the assembly process is substantially complete.
The swinging fork 7 is controlled by the control box to control the swinging of the swinging seat 5 so as to control the backward and forward sewing, and the driving cam 9 is controlled to swing so as to control the swinging of the rear lever gear 11 so as to control the pressure foot lifting.
Example two: referring to fig. 6: the same as the first embodiment, the purpose of lifting the presser foot is achieved by driving the motor to rotate continuously when the backstitch stitch length is maximum.
The structure of this embodiment is substantially the same as that of the first embodiment, and the difference is that: the mounting position of the drive cam 9 of the present embodiment is interchanged with that of the drive wheel 6, and the drive wheel 6 is located at the outer end of the rotary shaft 4. The installation position between the swing fork 7 and the swing seat 5 is correspondingly adjusted, and the lower end of the swing fork 7 is connected with the outer end of the swing seat 5.
Example three: referring to fig. 7: the structure of this embodiment is basically the same as that of the first embodiment. The differences are as follows: the swing fork assembly is structurally different. The swing fork assembly comprises a swing fork 7, a sliding block 19 and a driving wheel 6, one end of the swing fork 7 is provided with a fork opening 7a1, the sliding block 19 is sleeved on the driving wheel 6, the sliding block 19 is arranged in a fork opening 7a1 of the swing fork 7, the other end of the swing fork 7 is connected to a swing seat 5, the driving wheel 6 is eccentrically arranged on a rotating shaft 4, and the driving wheel 6 rotates along with the rotating shaft 4.
During installation, the guide block 19 is inserted onto the driving wheel 6, the oscillating fork 7 is then inserted onto the guide block 19, and the side cover 17 is placed on the corresponding end of the driving wheel 6 and locked with screws.
Example four: referring to fig. 8: the structure of this embodiment is basically the same as that of the first embodiment, and the difference is that: the present embodiment replaces the swing fork assembly with a slide bar assembly. The slide bar component has the following specific structure: the slide bar subassembly is including installing drive wheel 6 and slide bar 20 in pivot 4, the one end of slide bar 20 is provided with waist shape hole 21, drive wheel 6 rotates and sets up in waist shape hole 21, the other end and the swing seat 5 of slide bar 20 are connected, 6 eccentric settings of drive wheel are on pivot 4, and drive wheel 6 rotates along with pivot 4.
The driving cam 9 of the embodiment is positioned at the outer end of the rotating shaft 4 and can be suitable for backstitch presser foot lifting.
Example five: referring to fig. 9: the structure of this embodiment is substantially the same as that of the fourth embodiment, and the difference is that: the driving cam 9 of the present embodiment is exchanged with the mounting position of the driving wheel 6, the driving wheel 6 being located at the outer end of the rotating shaft 4. To accomplish backstitch presser foot raising, the slide rod 20 of the present embodiment is attached to the outer end of the left arm 5a1 of the swing base 5. A groove is formed in the left arm 5a1, and the other end of the slide rod 20 is inserted into the groove and connected by an axial screw.
The backstitch presser foot lifting can be realized in the embodiment as well.
Example six: referring to fig. 10: the structure of this embodiment is substantially the same as that of the fifth embodiment, and the difference is that: the slide bar assemblies are different.
The slide bar component has the following specific structure: the slide bar subassembly includes slide bar 20, slider 19 and drive wheel 6, and the one end of slide bar 20 is provided with waist shape hole 21, and slider 19 suit is on drive wheel 6, just slider 19 sets up in waist shape hole 21, and the other end of slide bar 19 is connected on swing seat 5, drive wheel 6 eccentric settings is on pivot 4, and drive wheel 6 rotates along with pivot 4.
Example seven: referring to fig. 11: the structure of this embodiment is substantially the same as that of the first embodiment, and the difference is that:
the driving wheel 6 of the present embodiment is of an integrated structure. Namely, an annular groove 22 is formed in the drive wheel 6, and the fork 7a1 is forked in the annular groove 22.
Example eight: see fig. 12-13: the structure of this embodiment is the same as that of the first embodiment, and the difference is the driving mechanism.
This embodiment actuating mechanism includes drive cam 9, and drive cam 9 passes through actuating lever 10 and is connected with drive back lever 23, the one end of drive back lever 23 is rotated and is installed on casing 1, the other end is provided with connecting pin 24, the back lever is the V-arrangement, including first support arm 25 and second support arm 26, the turning of back lever is provided with the equipment hole, the center in equipment hole is located the nodical of the central line of first support arm 25, second support arm 26, the contained angle alpha of the central line of first support arm 25, second support arm 26 is 65-80, and specific angle can be taken value wantonly in above-mentioned within range. An open groove 27 is formed in the outer end of the first support arm 25, the connecting pin 24 is slidably arranged in the open groove 27, a pull rod connecting hole 28 for connecting with a pull rod of a presser foot lifting mechanism is formed in the outer end of the second support arm 26, and the rear lever is rotatably arranged on the machine shell 1 through a screw passing through an assembling hole.
Example nine: referring to fig. 14: the structure of this embodiment is the same as that of the first embodiment, and the difference is the driving mechanism.
The driving mechanism of the embodiment comprises a driving cam 9, a driving rear lever 23 and a rear lever, wherein the driving cam 9 is connected with the driving rear lever 23 through a driving rod 10, the driving rear lever 23 is in a V shape and comprises a third support arm 29 and a fourth support arm 30, an assembly hole is arranged at the corner of the driving rear lever 23, the centre of said assembly hole is located at the intersection of the median lines of the third arm 29 and the fourth arm 30, the included angle between the central lines of the third support arm 29 and the fourth support arm 30 is 65-80 degrees, the outer end of the fourth supporting arm 30 is provided with a pull rod connecting hole 28 connected with a pull rod of the presser foot lifting mechanism, the outer end of the third supporting arm 29 is provided with a connecting pin 24, the driving rear lever 23 passes through the assembling hole through a screw to be rotatably installed on the machine shell 1, one end of the rear lever is rotatably installed on the machine shell 1, the other end of the rear lever is provided with an open slot 27, and the connecting pin 24 is slidably arranged in the open slot 27.
In the present specification, the terms "front", "rear", "first" and "second" are used for clarity of description only, and are not used to limit the scope of the present invention, and changes or modifications of the relative relationship thereof are also regarded as the scope of the present invention without substantial changes in the technical content.
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 invention are covered by the protection scope of the invention.
Claims (11)
1. The utility model provides a single motor drive is down in same direction as seam and is lifted device of presser foot, includes casing (1), driving motor (2), is down in same direction as seam mechanism, lifts presser foot mechanism, be provided with pivot mounting hole (3) on casing (1), driving motor (2) set up on casing (1), and pivot (4) of driving motor (2) pass pivot mounting hole (3) and stretch into in casing (1), its characterized in that: the rotating shaft (4) is connected with a swing seat (5) of the backward and forward sewing mechanism through a swing fork assembly or a slide rod assembly, the rotating shaft (4) rotates clockwise or anticlockwise to drive the swing fork assembly or the slide rod assembly to drive the swing seat (5) to swing so as to realize backward and forward sewing switching, the rotating shaft (4) is also connected with a rear lever of the presser foot lifting mechanism through a transmission mechanism, the rotating shaft (4) of the driving motor (2) continues to rotate after the forward sewing or backward sewing reaches the maximum needle pitch, the rear lever (23) is driven by the transmission mechanism to move so as to realize presser foot lifting, and when the driving motor (2) drives the presser foot lifting, the absolute value of the maximum value of the change of the needle pitch is greater than the maximum absolute value of the effective needle pitch;
the sliding rod assembly comprises a driving wheel (6) and a sliding rod (20) which are installed on a rotating shaft (4), a waist-shaped hole (21) is formed in one end of the sliding rod (20), the driving wheel (6) is rotatably arranged in the waist-shaped hole (21), the other end of the sliding rod (20) is connected with a swinging seat (5), the driving wheel (6) is eccentrically arranged on the rotating shaft (4), and the driving wheel (6) rotates along with the rotating shaft (4);
or: the slide bar assembly comprises a slide bar (20), a slide block (19) and a drive wheel (6), wherein one end of the slide bar (20) is provided with a waist-shaped hole (21), the slide block (19) is sleeved on the drive wheel (6), the slide block (19) is arranged in the waist-shaped hole (21), the other end of the slide bar (20) is connected to a swing seat (5), the drive wheel (6) is eccentrically arranged on a rotating shaft (4), and the drive wheel (6) rotates along with the rotating shaft (4).
2. The single motor driven backward and forward sewing presser foot lifting device according to claim 1, characterized in that: the swing seat (5) is U-shaped and comprises a left support arm (5 a 1), a right support arm (5 a 2) and a connecting cross arm (5 a 3), wherein an avoiding groove (5 b 1) is formed in the connecting cross arm (5 a 3), and the avoiding groove (5 b 1) is formed from the front side surface to the rear side surface of the connecting cross arm (5 a 3) and penetrates through the upper plane and the lower plane of the connecting cross arm (5 a 3).
3. The single motor driven backward and forward sewing presser foot lifting device according to claim 2, characterized in that: the rear side of the connecting cross arm (5 a 3) extends backwards and is provided with a reinforcing boss (5 a 4).
4. A single motor driven backstitch presser foot lifting device according to claim 1, 2 or 3, wherein: the swing fork assembly comprises a driving wheel (6) and a swing fork (7) which are arranged on the rotating shaft (4), one end of the swing fork (7) is provided with a fork opening (7 a 1), the fork opening (7 a 1) is inserted on the driving wheel (6), the other end of the fork opening is connected with the swing seat (5), the driving wheel (6) is eccentrically arranged on the rotating shaft (4), and the driving wheel (6) rotates along with the rotating shaft (4);
or: the swing fork assembly comprises a swing fork (7), a sliding block (19) and a driving wheel (6), a fork opening (7 a 1) is formed in one end of the swing fork (7), the sliding block (19) is sleeved on the driving wheel (6), the sliding block (19) is arranged in the fork opening (7 a 1) of the swing fork (7), the other end of the swing fork (7) is connected to a swing seat (5), the driving wheel (6) is eccentrically arranged on a rotating shaft (4), and the driving wheel (6) rotates along with the rotating shaft (4).
5. A single motor driven backstitch presser foot lifting device according to claim 1, 2 or 3, wherein: the transmission mechanism comprises a driving cam (9), the driving cam (9) is connected with an input gear of the gear transmission mechanism through a driving rod (10), an output gear of the gear transmission mechanism is connected with a rear lever gear (11), the rear lever gear (11) is a tooth part which is arranged on a rear lever and is in meshing transmission with the output gear, and the rear lever gear (11) is rotatably installed on the machine shell (1).
6. The single motor driven backward and forward sewing presser foot lifting device according to claim 5, characterized in that: the gear transmission mechanism comprises a driving gear (12) and a transmission gear (13) which are in meshing transmission, the driving gear (12) is an input gear, the transmission gear (13) is an output gear, and the driving gear (12) and the transmission gear (13) are directly or indirectly rotatably arranged on the machine shell (1).
7. A single motor driven backstitch presser foot lifting device according to claim 1, 2 or 3, wherein: drive mechanism includes drive cam (9), and drive cam (9) are connected with drive back lever (23) through actuating lever (10), the one end of drive back lever (23) is rotated and is installed on casing (1), the other end is provided with connecting pin (24), back lever is the V-arrangement, including first support arm (25) and second support arm (26), the turning of back lever is provided with the equipment hole, the outer end of first support arm (25) is provided with open slot (27), connecting pin (24) slide and set up in open slot (27), be provided with in the outer end of second support arm (26) and be used for lifting pull rod connecting hole (28) that the pull rod of presser foot mechanism is connected, back lever passes through the equipment hole through the screw and rotates and installs on casing (1).
8. The single motor driven backward and forward sewing presser foot lifting device according to claim 7, characterized in that: the center of the assembling hole is located at the intersection point of the central lines of the first support arm (25) and the second support arm (26), and the included angle of the central lines of the first support arm (25) and the second support arm (26) is 65-80 degrees.
9. A single motor driven backstitch presser foot lifting device according to claim 1, 2 or 3, wherein: drive mechanism includes actuating cam (9), drive back lever (23), back lever, and actuating cam (9) are connected with drive back lever (23) through actuating lever (10), drive back lever (23) are the V-arrangement, including third support arm (29) and fourth support arm (30), the corner of back lever is provided with the equipment hole, the outer end of fourth support arm (30) is provided with pull rod connecting hole (28) of being connected with the pull rod that lifts presser foot mechanism, and the outer end of third support arm (29) is provided with connecting pin (24), drive back lever (23) pass through the equipment hole through the screw and rotate and install on casing (1), the one end of back lever is rotated and is installed on casing (1), the other end is provided with open slot (27), connecting pin (24) slide and set up in open slot (27).
10. The single motor driven backward and forward sewing presser foot lifting device according to claim 9, characterized in that: the center of the assembling hole is located at the intersection point of the central lines of the third support arm (29) and the fourth support arm (30), and the included angle of the central lines of the third support arm (29) and the fourth support arm (30) is 65-80 degrees.
11. The single motor driven backward and forward sewing presser foot lifting device according to claim 1, characterized in that: the hinge mounting hole (3) is obtained for backstitch spanner shaft hole or based on backstitch spanner shaft hole, through the oil seal piece oil seal between hinge mounting hole (3) and pivot (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011415492.2A CN112458640B (en) | 2020-12-05 | 2020-12-05 | Single-motor driven device for reversing sewing and lifting presser foot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011415492.2A CN112458640B (en) | 2020-12-05 | 2020-12-05 | Single-motor driven device for reversing sewing and lifting presser foot |
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| Publication Number | Publication Date |
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| CN112458640A CN112458640A (en) | 2021-03-09 |
| CN112458640B true CN112458640B (en) | 2022-03-29 |
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| CN202011415492.2A Active CN112458640B (en) | 2020-12-05 | 2020-12-05 | Single-motor driven device for reversing sewing and lifting presser foot |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923449C2 (en) * | 1979-06-09 | 1983-08-18 | Union Special Gmbh, 7000 Stuttgart | Blind stitch sewing machine |
| JPH0728965B2 (en) * | 1988-07-26 | 1995-04-05 | 敏樹 山本 | Sewing prevention vertical feed dog machine sewing machine |
| JP2009254624A (en) * | 2008-04-17 | 2009-11-05 | Juki Corp | Back stitch device for sewing machine |
| JP2013179993A (en) * | 2012-02-29 | 2013-09-12 | Brother Ind Ltd | Sewing machine |
| CN104088086A (en) * | 2014-06-04 | 2014-10-08 | 池州学院 | Intelligently controlled multifunctional sewing machine |
| CN204343015U (en) * | 2014-12-05 | 2015-05-20 | 杰克缝纫机股份有限公司 | The built-in foot lifting mechanism of double needle machine |
| CN105821597A (en) * | 2016-05-23 | 2016-08-03 | 浙江美机缝纫机有限公司 | Automatic presser foot lifting and backward and forward sewing device of sewing machine and sewing machine |
| CN110424106B (en) * | 2019-09-06 | 2021-05-28 | 杰克缝纫机股份有限公司 | Presser foot lifting and backstitch driving structure of sewing machine |
| CN112267223A (en) * | 2020-11-03 | 2021-01-26 | 浙江沪龙科技股份有限公司 | Single-motor-driven mechanism for reversing sewing and lifting presser foot device and sewing machine |
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2020
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Denomination of invention: A single motor driving device for reverse sewing and presser foot lifting Effective date of registration: 20230303 Granted publication date: 20220329 Pledgee: Agricultural Bank of China Limited by Share Ltd. Yuhuan branch Pledgor: ZHEJIANG HULONG TECHNOLOGY CO.,LTD. Registration number: Y2023330000463 |
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