CN115573107A

CN115573107A - Thickness adjusting device of sewing machine

Info

Publication number: CN115573107A
Application number: CN202211383305.6A
Authority: CN
Inventors: 邱小军; 陈亨敏
Original assignee: Shanggong Sewing Machinery Zhejiang Co ltd
Current assignee: Shanggong Sewing Machinery Zhejiang Co ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-01-06

Abstract

The invention provides a thickness adjusting device of a sewing machine, and belongs to the technical field of sewing machines. It has solved the trouble problem of current thickness guiding mechanism regulation. This sewing machine includes the casing, work feed bearer and eccentric shaft, the one end of eccentric shaft links to each other with work feed bearer, adjustment mechanism includes the electro-magnet, the mounting bracket, the gangbar, the gag lever post, the elastic component, link firmly the spacing wheel at the eccentric shaft other end and link firmly the driver on the casing, the electro-magnet links firmly on the casing through the mounting bracket, a plurality of gear hole has on the mounting bracket, the gear plate has been linked firmly on the iron core of electro-magnet, the gear round pin has been linked firmly on the gear plate, the top and the gear plate of gangbar are articulated mutually, the bottom is articulated mutually with the gag lever post, spacing taking turns to have the spacing portion that the protrusion set up, spacing portion supports under the effect of elastic component and leans on the gag lever post, be equipped with circumferential location structure between the iron core of electro-magnet and the output shaft of driver. The thickness adjusting device of the sewing machine has the advantage of convenient adjustment.

Description

Thickness adjusting device of sewing machine

Technical Field

The invention belongs to the technical field of sewing machines, and relates to a thickness adjusting device of a sewing machine.

Background

The feeding process of the overedger is mainly realized by the reciprocating elliptical motion of the cloth feeding tooth frame, and the overedger continuously jacks and pulls the cloth on the needle plate through the cloth feeding tooth frame so as to continuously drag the cloth to be processed to the machine head to finish the whole feeding process. The angle of a cloth feeding tooth frame of a traditional overedger is fixed, the cloth with a specific thickness can be processed only, the cloth can be layered or stitches are too dense due to insufficient cloth dragging force of the cloth feeding tooth frame when thick materials are sewn, and the stitches can be wrinkled due to too much feeding when thin materials are sewn.

Various improvements have been made to solve the above problems, and some patents have been filed, for example, chinese patent literature discloses a feed adjusting mechanism of a overedger [ application No.: 201920911353.5; authorization notice number: CN210314737U ], which comprises a support member, a feed dog rack mounted on the support member, and an adjusting component connected with the feed dog rack; the adjusting component comprises an eccentric shaft arranged on the supporting piece and an adjusting rod connected with the eccentric shaft; the eccentric shaft comprises a concentric section connected with the adjusting rod and an eccentric section connected with the concentric section; the eccentric section is simultaneously arranged on the first sliding groove and the second sliding groove in a penetrating manner; the eccentric section can drive the active cloth feeding frame and the differential cloth feeding frame to deflect by swinging the adjusting rod when the concentric section rotates, so that the relative height between the active teeth and the differential teeth is adjusted, and the cloth feeding device is convenient to adapt to cloth with different thicknesses.

According to the feeding adjusting mechanism with the structure, the adjusting rod is rotated to be high-grade or low-grade in a manual mode, the feeding tooth rack is inclined, the height of the driving tooth is lower than or higher than that of the differential tooth, the feeding adjusting mechanism adjusts the height of the feeding tooth, and then the feeding tooth rack is locked through the locking assembly. However, the feeding adjusting mechanism is adjusted manually, and is troublesome to adjust.

Disclosure of Invention

The invention aims to provide a thickness adjusting device of a sewing machine aiming at the problems in the prior art, and solves the technical problem of how to automatically adjust an adjusting mechanism, and the adjustment is convenient.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a sewing machine thickness adjusting device, sewing machine includes casing, work feed dental articulator and eccentric shaft, the one end of eccentric shaft links to each other with the work feed dental articulator, its characterized in that, adjustment mechanism include electro-magnet, mounting bracket, gangbar, gag lever post, elastic component, link firmly the spacing wheel at the eccentric shaft other end and link firmly the driver on the casing, the electro-magnet links firmly on the casing through the mounting bracket, a plurality of gear hole has on the mounting bracket, the gear plate has been linked firmly on the iron core of electro-magnet, the gear round pin has been linked firmly on the gear plate, the top and the gear plate of gangbar are articulated mutually, and the bottom is articulated with the gag lever post, the spacing portion that the protrusion set up has on the gag lever post, spacing portion supports under the effect of elastic component and leans on the gag lever post, be equipped with circumference location structure between the iron core of electro-magnet and the output shaft of driver, when the iron core of electro-magnet stretches out, the output shaft of driver drives the iron core rotation through circumference location structure, the iron core rotation drives the gag lever post removal through gear plate and gangbar when the iron core withdrawal, when the iron core withdrawal of electro-magnet, gear round pin is embedded into corresponding gear hole.

When the sewing machine is used for sewing materials, the gear pin is embedded into the gear hole, the position of the limiting rod is controlled by the gear plate and the linkage rod at the position of the gear pin, the limiting part is abutted against the limiting rod under the action of the elastic part, the position of the angle of the limiting wheel can be controlled, and therefore the height of the cloth feeding tooth frame is controlled through the eccentric shaft, and the sewing machine is suitable for sewing materials with one thickness. During the regulation, the signal is accepted to the electro-magnet, the iron core stretches out along self axial, make the output shaft of driver pass through circumference location structure and iron core circumference location, the output shaft of driver rotates certain angle afterwards, it rotates certain angle to drive the iron core through circumference location structure, thereby change the position of gear round pin, gear plate is passed through to this position of gear round pin, the gangbar control gag lever post is in another position, make spacing round fix at another angle, thereby change the height of work feed dog frame through the eccentric shaft, make this sewing machine can be fit for the sewing material sewing of another kind of thickness, the iron core of electro-magnet retracts along self axial afterwards, the output shaft and the iron core of driver break away from mutually, the gear round pin is embedded into in another gear hole and is made the gear round pin location, guarantee stability. This sewing machine makes the gear round pin can wear to establish in the gear hole of difference through the cooperation of electro-magnet, driver and circumference location structure etc to make work feed dental articulator be in different height, make this sewing machine can be fit for the sewing of different thickness sewing materials, this adjusting device adjusts the convenience through automatic mode.

In the thickness adjusting device of the sewing machine, the iron core of the electromagnet is coaxially arranged with the output shaft of the driver, and the iron core of the electromagnet is opposite to the output shaft of the driver. This kind of structure makes circumferential location structure's simple structure, makes the circumferential location of realization iron core and driver output shaft that circumferential location structure can be better, makes the drive iron core that the output shaft of driver can be better simultaneously rotate.

In foretell sewing machine thickness adjusting device, the mounting bracket is including being annular collar and being platelike mounting panel, the one end and the collar of mounting panel link firmly mutually, pass the mounting panel through the fastener and penetrate the casing in make the mounting bracket links firmly mutually with the casing, the electro-magnet is worn to establish and is fixed in the collar, the gear hole is located the collar. This kind of structure makes the mounting bracket play the effect of location gear round pin position when playing the installation electro-magnet effect, simplifies the structure.

In the above-mentioned thickness adjusting device for sewing machine, the linkage rod is bent, and the top of the linkage rod is arranged in a staggered manner with the bottom of the linkage rod along the horizontal direction. The structure enables the linkage rod to be better connected with the gear plate and the limiting rod, and the layout of the thickness adjusting device is more reasonable when the thickness adjusting device is installed outside the shell.

In the thickness adjusting device of the sewing machine, the inner end of the gear plate is fixedly connected with the iron core, the outer end of the gear plate is provided with a hinge hole which is in a long strip shape and is used for being hinged with the linkage rod, and the width of the gear plate is gradually increased towards the outer end along the inner end. The structure ensures the strength of the gear plate, saves materials, and simultaneously prevents the linkage rod and the gear plate from being blocked when rotating relatively.

In the thickness adjusting device of the sewing machine, the circumferential positioning structure comprises a positioning groove which is concavely arranged on the iron core and a positioning bulge which is convexly arranged on the output shaft of the driver, when the iron core of the electromagnet extends out, the positioning bulge is embedded into the positioning groove to circumferentially position the iron core and the output shaft of the driver, and when the iron core of the electromagnet retracts, the positioning bulge leaves the positioning groove to separate the iron core and the output shaft of the driver. The circumference location of iron core and driver output shaft is realized through concave-convex structure's cooperation, simple structure, and the stability of circumference location is good, in actual production, also can make and set up the constant head tank on the driver output shaft, sets up the location arch on the iron core.

In foretell sewing machine thickness adjusting device, the holding tank has been seted up to the one end that the driver output shaft is close to the electro-magnet, linked firmly the locating piece through the fastener in the holding tank, the locating piece sets up including the protrusion the location is protruding, the protruding protrusion in location sets up outside the circumference lateral wall of driver output shaft, the constant head tank includes main part groove and the vice body groove of protrusion setting outside the main part groove, when the iron core of electro-magnet stretches out, the drive output shaft part is embedded into in the main part groove just the protruding embedding in location is vice body groove. This kind of structure improves area of contact, guarantees the stability of driver output shaft and iron core circumference location.

In foretell sewing machine thickness adjusting device, the groove of dodging of recessed setting has on the lateral wall of casing, the limiting plate has still been linked firmly on the casing, the limiting plate is located the notch department of dodging the groove, the gag lever post is the L shape, gag lever post part is located dodges the groove, the top on the gag lever post long limit is articulated mutually with the bottom of gangbar, the outer end and the spacing portion of gag lever post minor face contact. The groove avoiding structure has the advantages that the installation space is provided by the arrangement of the groove avoiding structure, the groove bottom of the groove avoiding structure is matched with the limiting plate to limit the limiting rod, the limiting rod is enabled to move according to a set path, the stability of the adjusting device during adjustment is guaranteed, and the adjusting precision is improved.

In the above-mentioned thickness adjusting device for a sewing machine, the elastic member is a tension spring, the limiting portion is in a long strip shape, one end of the elastic member acts on the outer end portion of the limiting portion, and the other end acts on the housing. Through the pulling of extension spring, simple structure, in actual production, also can go to promote spacing portion motion through the spring.

In the thickness adjusting device of the sewing machine, the output shaft of the driver is further fixedly connected with a thread cutting cam for driving a cutter of the sewing machine to rotate, a first eccentric wheel for driving the sewing machine to lift the presser foot to work and a second eccentric wheel for driving the eccentric shaft to swing in a reciprocating manner. The sewing machine can realize the movement of the cloth cutting, the presser foot lifting and the feed dog of the sewing machine through one driver, and can realize the height adjustment of the feed dog rack, so that the sewing machine is suitable for sewing materials with different thicknesses, namely, four actions of the sewing machine can be realized through one driver, the design is ingenious, and the cost is reduced.

Compared with the prior art, the thickness adjusting device of the sewing machine provided by the invention has the following advantages:

1. this sewing machine makes the gear round pin can wear to establish in the gear hole of difference through the cooperation of electro-magnet, driver and circumference location structure etc to make work feed dental articulator can be in different heights, make this sewing machine can be fit for the sewing of different thickness sewing materials, this adjusting device adjusts the convenience through automatic mode moreover.

2. The output shaft of the sewing machine driver is fixedly connected with a plurality of parts, the parts are connected with a cutter of the sewing machine, a lifting presser foot and a feed dog rack through corresponding structures, the height of the feed dog rack can be adjusted simultaneously, namely four actions of the sewing machine can be realized through one driver, the design is ingenious, and the cost is reduced.

Drawings

FIG. 1 is a schematic view showing an external structure of the sewing machine.

FIG. 2 is a schematic view of the thickness adjusting device mounted on a sewing machine.

FIG. 3 is a schematic structural view of the thickness adjusting device of the sewing machine.

FIG. 4 is a schematic view showing the structure of the present sewing machine actuator and electromagnet.

In the figure, 1, a housing; 2. a feed dog frame; 3. an eccentric shaft; 4. an electromagnet; 41. an iron core; 5. a mounting frame; 51. a gear hole; 52. a mounting ring; 53. mounting a plate; 6. a linkage rod; 7. a limiting rod; 8. an elastic member; 9. a limiting wheel; 91. a limiting part; 10. a driver; 101. an output shaft; 11. a gear plate; 111. a hinge hole; 12. a gear pin; 13. positioning a groove; 131. a body groove; 132. a sub body groove; 14. positioning blocks; 141. positioning the projection; 15. accommodating a tank; 16. an avoidance groove; 17. a limiting plate; 18. a trimming cam; 19. a first eccentric wheel; 20. a second eccentric wheel.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figure 1, the sewing machine comprises a shell 1, a feed dog frame 2, an eccentric shaft 3 and a thickness adjusting device, wherein the adjusting device comprises an electromagnet 4, a mounting frame 5, a linkage rod 6, a limiting rod 7, an elastic part 8, a limiting wheel 9 and a driver 10. As shown in fig. 4, a thread cutting cam 18 for driving a cutting knife of the sewing machine to rotate, a first eccentric wheel 19 for driving a presser foot of the sewing machine to work, and a second eccentric wheel 20 for driving the eccentric shaft 3 to swing back and forth are fixedly connected to an output shaft 101 of the driver 10.

The driver 10 links firmly on casing 1, mounting bracket 5 is including being annular collar 52 and being platelike mounting panel 53, the one end and the collar 52 of mounting panel 53 link firmly mutually, pass mounting panel 53 and penetrate casing 1 and make mounting bracket 5 link firmly mutually with casing 1 through the fastener like the bolt, electro-magnet 4 wears to establish and fixes in collar 52, the iron core 41 of electro-magnet 4 and the coaxial setting of output shaft 101 of driver 10, the iron core 41 of electro-magnet 4 and the relative setting of output shaft 101 of driver 10. The mounting ring 52 has the shift holes 51 therein, and in the present embodiment, the number of the shift holes 51 is three, and in actual production, the number of the shift holes 51 may be two or four.

As shown in fig. 2 and 3, a circumferential positioning structure is arranged between the iron core 41 of the electromagnet 4 and the output shaft 101 of the driver 10, the circumferential positioning structure includes a positioning groove 13 concavely arranged on the iron core 41 and a positioning protrusion 141 convexly arranged on the output shaft 101 of the driver 10, an accommodating groove 15 is formed in one end of the output shaft 101 of the driver 10 close to the electromagnet 4, the positioning block 14 is embedded into the positioning groove 13, the positioning block 14 is fixedly connected with the output shaft 101 of the driver 10 through a fastener such as a bolt, the positioning block 14 includes the positioning protrusion 141 convexly arranged, the positioning protrusion 141 is convexly arranged outside the circumferential outer side wall of the output shaft 101 of the driver 10, the positioning groove 13 includes a main body groove 131 and an auxiliary body groove 132 convexly arranged outside the main body groove 131. When the iron core 41 of the electromagnet 4 is extended, the output shaft 101 of the driver 10 is partially inserted into the main body groove 131 and the positioning projection 141 is inserted into the sub body groove 132, so that the iron core 41 and the output shaft 101 of the driver 10 are circumferentially positioned, and when the iron core 41 of the electromagnet 4 is retracted, the positioning projection 141 is separated from the positioning groove 13 so that the iron core 41 and the output shaft 101 of the driver 10 are disengaged.

One end of the eccentric shaft 3 is connected with the feed dog frame 2, the other end of the eccentric shaft 3 is fixedly connected with a limiting wheel 9, a limiting part 91 which is convexly arranged is arranged on the limiting wheel 9, and the limiting part 91 is supported on the limiting rod 7 under the action of the elastic part 8. Specifically, the elastic member 8 is a tension spring, the stopper 91 is elongated, one end of the elastic member 8 acts on the outer end of the stopper 91, and the other end acts on the housing 1.

The iron core 41 of the electromagnet 4 is fixedly connected with a gear plate 11, the gear plate 11 is fixedly connected with a gear pin 12, the inner end of the gear plate 11 is fixedly connected with the iron core 41, the outer end of the gear plate is provided with a hinge hole 111 which is long and is used for being hinged with the linkage rod 6, and the width of the gear plate 11 is gradually increased towards the outer end along the inner end. The linkage rod 6 is bent, the top of the linkage rod 6 is arranged in a staggered mode with the bottom of the linkage rod 6 along the horizontal direction, the top of the linkage rod 6 is hinged to the gear plate 11, and the bottom of the linkage rod 6 is hinged to the limiting rod 7. Have the recessed groove 16 of dodging that sets up on casing 1's the lateral wall, still linked firmly limiting plate 17 on casing 1, limiting plate 17 is located the notch department of dodging groove 16, and gag lever post 7 is L shape, and gag lever post 7 part is arranged in dodging groove 16, and the top on 7 long limits of gag lever post is articulated mutually with the bottom of gangbar 6, and the outer end and the spacing portion 91 of 7 minor faces of gag lever post contact.

Initially, the gear pin 12 is embedded into one gear hole 51, and the position of the gear pin 12 controls the position of the limiting rod 7 through the gear plate 11 and the linkage rod 6, that is, the position of the limiting wheel 9 can be controlled, so that the height of the feed dog frame 2 is controlled through the eccentric shaft 3. When the cloth feeding tooth rack is adjusted, the electromagnet 4 receives a signal, the iron core 41 extends out along the self axial direction, the output shaft 101 of the driver 10 is circumferentially positioned with the iron core 41 through the circumferential positioning structure, then the output shaft 101 of the driver 10 rotates for a certain angle, the iron core 41 is driven to rotate for a certain angle through the circumferential positioning structure, the position of the gear pin 12 is changed, the position of the gear pin 12 controls the limiting rod 7 to be in another position through the gear plate 11 and the linkage rod 6, the limiting wheel 9 is positioned at another angle, the height of the cloth feeding tooth rack 2 is changed through the eccentric shaft 3, then the iron core 41 of the electromagnet 4 moves along the self axial direction, the output shaft 101 of the driver 10 is separated from the iron core 41, and the gear pin 12 is embedded into another gear hole 51 to complete adjustment.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although terms such as the housing 1, the feed dog carrier 2, the eccentric shaft 3, the electromagnet 4, the iron core 41, the mounting bracket 5, the gear hole 51, the mounting ring 52, the mounting plate 53, the linkage rod 6, the limit rod 7, the elastic member 8, the limit wheel 9, the limit portion 91, the driver 10, the output shaft 101, the gear plate 11, the hinge hole 111, the gear pin 12, the positioning groove 13, the main body groove 131, the sub body groove 132, the positioning block 14, the positioning protrusion 141, the accommodating groove 15, the escape groove 16, the limit plate 17, the trimming cam 18, the first eccentric wheel 19, the second eccentric wheel 20, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a sewing machine thickness adjusting device, sewing machine include casing (1), work feed retainer (2) and eccentric shaft (3), the one end of eccentric shaft (3) links to each other with work feed retainer (2), its characterized in that, adjustment mechanism includes electro-magnet (4), mounting bracket (5), gangbar (6), gag lever post (7), elastic component (8), link firmly spacing wheel (9) at the eccentric shaft (3) other end and link firmly driver (10) on casing (1), electro-magnet (4) link firmly on casing (1) through mounting bracket (5), a plurality of gear hole (51) have on mounting bracket (5), link firmly gear plate (11) on iron core (41) of electro-magnet (4), link firmly gear round pin (12) on gear plate (11), the top of gangbar (6) is articulated with gear plate (11), and the bottom is articulated with gag lever post (7), have protruding setting spacing portion (91) on gag lever post (9), spacing portion (91) is supported and is leaned on when the effect of elastic component (8) is leaned on under electro-magnet (4) and driver (10), when the iron core (41) is extended position structure (10), an output shaft (101) of the driver (10) drives an iron core (41) to rotate through a circumferential positioning structure, the iron core (41) rotates to drive a limiting rod (7) to move through a gear plate (11) and a linkage rod (6), and when the iron core (41) of the electromagnet (4) retracts, a gear pin (12) is embedded into a corresponding gear hole (51).

2. The thickness adjusting device of a sewing machine according to claim 1, wherein the iron core (41) of the electromagnet (4) is coaxially disposed with the output shaft (101) of the driver (10), and the iron core (41) of the electromagnet (4) and the output shaft (101) of the driver (10) are disposed opposite to each other.

3. The thickness adjusting device of the sewing machine according to claim 1, wherein the mounting frame (5) comprises an annular mounting ring (52) and a plate-shaped mounting plate (53), one end of the mounting plate (53) is fixedly connected with the mounting ring (52), the mounting frame (5) is fixedly connected with the housing (1) by a fastener penetrating through the mounting plate (53) and penetrating into the housing (1), the electromagnet (4) is fixedly arranged in the mounting ring (52), and the shift hole (51) is located in the mounting ring (52).

4. The thickness adjusting device of the sewing machine as claimed in claim 1, 2 or 3, wherein the linkage rod (6) is bent, and the top of the linkage rod (6) is staggered with the bottom of the linkage rod (6) along the horizontal direction.

5. The thickness adjusting device of the sewing machine according to claim 1, 2 or 3, characterized in that the inner end of the gear plate (11) is fixedly connected with the iron core (41), the outer end is provided with a hinge hole (111) which is long and is used for being hinged with the linkage rod (6), and the width of the gear plate (11) is gradually increased along the inner end towards the outer end.

6. The thickness adjusting device of the sewing machine according to claim 1, 2 or 3, characterized in that the circumferential positioning structure comprises a positioning groove (13) concavely arranged on the iron core (41) and a positioning protrusion (141) convexly arranged on the output shaft (101) of the driver (10), when the iron core (41) of the electromagnet (4) extends, the positioning protrusion (141) is embedded into the positioning groove (13) to circumferentially position the iron core (41) and the output shaft (101) of the driver (10), and when the iron core (41) of the electromagnet (4) retracts, the positioning protrusion (141) leaves the positioning groove (13) to separate the iron core (41) and the output shaft (101) of the driver (10).

7. The thickness adjusting device of the sewing machine according to claim 6, wherein a receiving groove (15) is formed in one end, close to the electromagnet (4), of the output shaft (101) of the driver (10), a positioning block (14) is fixedly connected to the receiving groove (15) through a fastener, the positioning block (14) comprises the positioning protrusion (141) which is arranged in a protruding manner, the positioning protrusion (141) is arranged outside the circumferential outer side wall of the output shaft (101) of the driver (10) in a protruding manner, the positioning groove (13) comprises a main body groove (131) and an auxiliary body groove (132) which is arranged outside the main body groove (131) in a protruding manner, and when the iron core (41) of the electromagnet (4) extends, the output shaft (101) of the driver (10) is partially embedded into the main body groove (131) and the positioning protrusion (141) is embedded into the auxiliary body groove (132).

8. The sewing machine thickness adjusting device according to claim 1, 2 or 3, characterized in that, recess groove (16) of dodging that sets up has on the lateral wall of casing (1), limiting plate (17) have still been linked firmly on casing (1), limiting plate (17) are located the notch department of dodging groove (16), gag lever post (7) are L shape, gag lever post (7) part is located dodges groove (16), the top on the long limit of gag lever post (7) is articulated mutually with the bottom of gangbar (6), the outer end and spacing portion (91) of gag lever post (7) minor face contact.

9. A sewing machine thickness adjusting apparatus according to claim 1, 2 or 3, wherein the elastic member (8) is a tension spring, the stopper portion (91) is elongated, one end of the elastic member (8) acts on an outer end portion of the stopper portion (91), and the other end acts on the housing (1).

10. The thickness adjusting device of the sewing machine according to claim 1, 2 or 3, characterized in that the output shaft (101) of the driver (10) is further connected with a thread trimming cam (18) for driving a cutting knife of the sewing machine to rotate, a first eccentric wheel (19) for driving a presser foot of the sewing machine to work and a second eccentric wheel (20) for driving the eccentric shaft (3) to swing back and forth.