CN216998794U - Overedger - Google Patents

Abstract

The utility model relates to a overedger, which comprises a shell, a presser foot lifting mechanism, a thread trimming mechanism, a tooth lower supply mechanism, a needle pitch adjusting mechanism, a rotary driving piece and a cam piece, wherein the cam piece is provided with a presser foot lifting profile corresponding to the presser foot lifting mechanism, a thread trimming profile corresponding to the thread trimming mechanism, a lower supply profile corresponding to the tooth lower supply mechanism and a needle pitch adjusting profile corresponding to the needle pitch adjusting mechanism, and the rotary driving piece can drive the cam piece to rotate so that the presser foot lifting profile, the thread trimming profile, the lower supply profile and the needle pitch adjusting profile can drive the corresponding presser foot lifting mechanism, the thread trimming mechanism, the tooth lower supply mechanism and the needle pitch adjusting mechanism to act. The utility model can realize the automatic control of pressure foot lifting, thread trimming, tooth lower supply and needle distance adjustment by using a rotary driving piece, and has the functions of simplifying the structure and reducing the cost.

Description

Overedger

Technical Field

The utility model relates to the technical field of sewing, in particular to an overlock sewing machine.

Background

The existing automatic overedger has the functions of automatically lifting the presser foot and automatically cutting threads, and the functions of lifting the presser foot and cutting the threads are realized by forward and reverse rotation of a motor (servo/stepping) and the like by one driving two, so that the voice is low when the presser foot and the threads are lifted. However, the stitch length adjustment and the tooth lower supply in the existing overedger still stay in mechanical adjustment, and if a motor or a power source is added to drive the overedger to realize the automatic control effect of the stitch length adjustment and the tooth lower supply, the electric control and the part cost of the overedger can be greatly increased, so that the market competitiveness of the product can be reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an overlock sewing machine for solving the above problems.

A overedger comprises a machine shell, a presser foot lifting mechanism, a thread cutting mechanism, a tooth lower supply mechanism and a needle pitch adjusting mechanism, wherein the presser foot lifting mechanism, the thread cutting mechanism, the tooth lower supply mechanism and the needle pitch adjusting mechanism are all arranged on the machine shell;

the overedger further comprises a rotary driving part and a cam piece, wherein the cam piece is arranged on the rotary part of the rotary driving part, and is provided with a pressure lifting pin contour corresponding to the pressure lifting pin mechanism, a trimming contour corresponding to the trimming mechanism, a lower supply contour corresponding to the tooth lower supply mechanism and a needle pitch adjusting contour corresponding to the needle pitch adjusting mechanism;

the rotary driving part can drive the cam part to rotate through the rotating part, so that the presser foot lifting profile, the thread trimming profile, the lower pressure supply profile and the stitch length adjusting profile can drive the corresponding presser foot lifting mechanism, the thread trimming mechanism, the tooth lower pressure supply mechanism and the stitch length adjusting mechanism to act.

In this application, through above-mentioned reasonable structure setting for this hemming machine can utilize on the cam member to lift presser foot profile, trimming profile, supply profile and gauge needle adjustment profile down to realize respectively lifting presser foot mechanism, trimming mechanism, supplying the power transmission of mechanism and gauge needle adjustment mechanism under the tooth, with this realization this hemming machine can realize lifting presser foot, trimming, supplying under the tooth and the automatic control of gauge needle adjustment with a rotary driving piece, has the simplified structure, reduce cost's effect.

In one embodiment, the cam member includes a first cam portion, a second cam portion, and a third cam portion, and the rotation center line of the first cam portion, the rotation center line of the second cam portion, and the rotation center line of the third cam portion are arranged on the same straight line; the pressure raising and pressing foot profile and the lower pressure supply profile are arranged on the outer peripheral surface of the first cam part, the needle pitch adjusting profile is arranged on the outer peripheral surface of the second cam part, and the thread cutting profile is arranged on the outer peripheral surface of the third cam part.

It will be appreciated that the structural arrangement of the presser foot lifting profile, the thread trimming profile, the lower feed profile and the pitch adjustment profile on the cam member is embodied by the structural arrangement described above.

In one embodiment, the presser foot lifting mechanism comprises a presser foot roller, the presser foot lifting profile comprises a presser foot base circle segment, a first presser foot gradually-opened line segment and a second presser foot gradually-opened line segment, and the center of the presser foot base circle segment is arranged on the rotation center line of the cam member; the presser foot lifting contour can push the presser foot roller through the first presser foot involute section and/or the second presser foot involute section so as to enable the presser foot lifting mechanism to carry out power transmission.

It can be understood that, through the structural arrangement, the matching between the presser foot lifting profile and the presser foot lifting mechanism is realized, so that the cam member can push against the presser foot roller by utilizing the presser foot lifting profile, and the selective power transmission of the presser foot lifting mechanism is realized.

In one embodiment, the presser foot lifting mechanism further comprises a presser foot lifting crank, a connecting hook, a lever member, a reset ring, a presser foot shaft, a presser foot arm and a presser foot assembly, wherein the presser foot lifting crank and the presser foot shaft are both rotatably mounted on the housing, one end of the presser foot shaft is connected to the presser foot assembly through the presser foot arm, and the other end of the presser foot shaft is selectively matched with the lever member through the reset ring; the pressure foot lifting crank is connected with the lever piece through the connecting hook, and the pressure foot roller is rotatably arranged on one end part, far away from the connecting hook, of the pressure foot lifting crank.

It can be understood that the structural arrangement of the presser foot lifting mechanism is realized by the structural arrangement.

In one embodiment, the thread trimming mechanism comprises a thread trimming roller, the thread trimming contour comprises a thread trimming base circle section, a first thread trimming gradually-opening section and a second thread trimming gradually-opening section, and the center of the thread trimming base circle section is arranged on the rotation central line of the cam member; the thread cutting outline can be pushed against the thread cutting roller through the first thread cutting involute section and/or the second thread cutting involute section, so that the thread cutting mechanism can transmit power.

It can be understood that, by the structural arrangement, the matching between the thread trimming profile and the thread trimming mechanism is realized, so that the cam member can utilize the pushing of the thread trimming profile to the thread trimming roller to realize the selective power transmission to the thread trimming mechanism.

In one embodiment, the thread trimming mechanism further includes a guide seat, a sliding shaft, a thread trimming sliding fork, a thread trimming connecting rod, a thread trimming crank, and a thread trimming knife assembly, the sliding shaft is slidably mounted on the guide seat, the thread trimming sliding fork is mounted on an end portion of the sliding shaft extending out of the guide seat, one end of the thread trimming sliding fork is connected to the thread trimming crank through the thread trimming connecting rod, the thread trimming roller is rotatably mounted on the other end of the thread trimming sliding fork, and the thread trimming knife assembly is mounted on one end of the thread trimming crank, which is far away from the thread trimming connecting rod.

It can be understood that the structural arrangement of the thread trimming mechanism is realized by the structural arrangement.

In one embodiment, the tooth lower supply mechanism comprises a lower supply roller, the lower supply contour comprises a first lower supply base circle section, a lower supply involute section and a second lower supply base circle section, the first lower supply base circle section is arranged on a rotation central line of the cam piece, and the lower supply contour can push the lower supply roller through the lower supply involute section and/or the second lower supply base circle section so that the tooth lower supply mechanism can transmit power.

It can be understood that, by the structural arrangement, the matching between the lower supply contour and the tooth lower supply mechanism is realized, so that the cam member can realize the selective power transmission of the tooth lower supply mechanism by utilizing the pushing of the lower supply contour to the lower supply roller.

In one embodiment, the tooth lower supply mechanism comprises a connecting sleeve, a driving shaft, a lower supply crank and a dental articulator, the connecting sleeve is mounted on the casing, the driving shaft penetrates through the connecting sleeve, wherein an eccentric part is arranged at one end of the driving shaft, which extends out of the connecting sleeve, and the eccentric part penetrates through an open slot of the dental articulator; the lower supply crank is arranged at the other end of the driving shaft extending out of the connecting sleeve, and the lower supply roller is rotatably arranged on the lower supply crank.

It will be appreciated that the structural arrangement of the under-dental delivery mechanism is embodied by the structural arrangement described above.

In one embodiment, the needle distance adjusting mechanism comprises a needle distance roller, the needle distance adjusting profile comprises a first needle distance base circle section, a needle distance gradually-opening line section and a second needle distance base circle section, and the circle center of the first needle distance base circle section is arranged on the rotation center line of the cam piece; the needle pitch adjusting contour can push the needle pitch roller through the needle pitch gradually-opening line segment and/or the second needle pitch base circle segment, so that the needle pitch adjusting mechanism can transmit power.

It can be understood that, by the structural arrangement described above, the cooperation between the needle pitch adjusting profile and the needle pitch adjusting mechanism is realized, so that the cam member can realize selective power transmission to the needle pitch adjusting mechanism by utilizing the pushing of the needle pitch roller by the adjusting profile.

In one embodiment, the needle pitch adjusting mechanism comprises a spindle motor, a cloth feeding assembly, a first crank, a crank connecting assembly, a transmission shaft and a second crank, wherein the cloth feeding assembly is mounted on a rotating shaft part of the spindle motor, the cloth feeding assembly is provided with a needle opening groove, one end of the first crank is provided with a needle pitch adjusting piece, and the first crank can drive the needle pitch adjusting piece to be clamped into the needle opening groove; the other end of the first crank is connected with the transmission shaft through the crank connecting assembly, the second crank is installed on the transmission shaft, and the needle pitch roller is rotatably installed on the second crank.

It can be understood that the structural arrangement of the needle pitch adjusting mechanism is realized by the structural arrangement described above.

Drawings

Fig. 1 is a schematic structural diagram of an overlock machine according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a presser foot lifting mechanism in the present application.

Fig. 3 is an enlarged view of a portion P in fig. 2.

Fig. 4 is a schematic structural diagram of a thread trimming mechanism in the present application.

Fig. 5 is a schematic view of the rotary drive member, cam member and tooth lower feed mechanism of the present application.

Fig. 6 is a schematic structural view of the pitch adjustment mechanism in the present application.

Fig. 7 is a partial structural schematic diagram of a needle pitch adjusting mechanism in the present application.

FIG. 8 is a front view of the cam member of the present application.

Fig. 9 is a right side view of the cam member of the present application.

FIG. 10 is a rear view of the cam member of the present application.

10, a machine shell; 20. a presser foot lifting mechanism; 21. a presser foot roller; 22. lifting a presser foot crank; 23. connecting a hook; 24. a lever member; 241. pushing the convex part; 25. a reset ring; 251. a stopper; 26. a presser foot shaft; 27. a presser foot arm; 28. a presser foot assembly; 30. a thread trimming mechanism; 31. trimming rollers; 32. a guide seat; 33. a sliding shaft; 34. trimming a sliding fork; 35. trimming connecting rods; 36. a thread cutting crank; 37. a thread trimmer assembly; 40. a tooth lower supply mechanism; 41. a lower supply roller; 42. connecting sleeves; 43. a drive shaft; 431. an eccentric portion; 44. a lower supply crank; 45. a dental articulator; 451. an open slot; 46. a main shaft; 50. a needle pitch adjustment mechanism; 51. a gauge roller; 52. a spindle motor; 521. a rotating shaft part; 53. a cloth feeding assembly; 531. opening a needle groove; 54. a first crank; 541. a gauge needle adjustment member; 55. a crank connecting assembly; 551. a third crank; 552. a crank connecting rod; 553. a fourth crank; 554. installing a shaft; 56. a drive shaft; 57. a second crank; 60. a rotary drive member; 61. a rotating part; 70. a cam member; 701. a first cam portion; 702. a second cam portion; 703. a third cam portion; 71. lifting the outline of the presser foot; 711. a presser foot base circle segment; 712. a first presser foot involute segment; 713. a second presser foot involute segment; 72. trimming the contour; 721. trimming a base circle section; 722. a first cut line gradually-opening line segment; 723. a second cut line gradually-opening line segment; 73. a lower supply profile; 731. a first lower supply base circle segment; 732. a lower involute section; 733. a second lower supply base circle segment; 74. a gauge adjustment profile; 741. a first pitch base circle segment; 742. gradually opening the line segment by the needle pitch; 743. a second gauge pitch base circle segment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 10, the overedger according to an embodiment of the present invention includes a housing 10, a presser foot lifting mechanism 20, a thread trimming mechanism 30, a tooth lower supply mechanism 40, and a needle pitch adjusting mechanism 50.

Wherein, the foot lifting and pressing mechanism 20, the thread trimming mechanism 30, the tooth lower supply mechanism 40 and the needle pitch adjusting mechanism 50 are all arranged on the machine shell 10.

In the present embodiment, the overedger of the present embodiment further includes a rotary driving member 60 and a cam member 70, the cam member 70 is mounted on the rotary portion 61 of the rotary driving member 60, and when the overedger of the present embodiment is in operation, the rotary driving member 60 can respectively drive the presser foot lifting mechanism 20, the thread trimming mechanism 30, the under-tooth supply mechanism 40 and the needle pitch adjusting mechanism 50 through the cam member 70, that is, when the overedger is in operation, the automatic control of the presser foot lifting, thread trimming, under-tooth supply and needle pitch adjustment can be realized by using one rotary driving member 60. It should be noted that the rotary drive 60 of the overedger is provided as a motor.

As shown in fig. 8 to 10, the cam member 70 of the present embodiment has a presser foot lifting profile 71 corresponding to the presser foot lifting mechanism 20, a thread trimming profile 72 corresponding to the thread trimming mechanism 30, a lower thread supplying profile 73 corresponding to the lower tooth supplying mechanism 40, and a needle pitch adjusting profile 74 corresponding to the needle pitch adjusting mechanism 50, so that the presser foot lifting profile 71, the thread trimming profile 72, the lower thread supplying profile 73, and the needle pitch adjusting profile 74 can be respectively applied to the presser foot lifting mechanism 20, the thread trimming mechanism 30, the lower tooth supplying mechanism 40, and the needle pitch adjusting mechanism 50 during rotation of the cam member 70, so that the presser foot lifting mechanism 20, the thread trimming mechanism 30, the lower tooth supplying mechanism 40, and the needle pitch adjusting mechanism 50 can respectively perform power transmission.

Specifically, the cam member 70 includes a first cam portion 701, a second cam portion 702, and a third cam portion 703, and the rotation center line of the first cam portion 701, the rotation center line of the second cam portion 702, and the rotation center line of the third cam portion 703 are disposed on the same straight line; the presser foot lifting contour 71 and the lower feed contour 73 are arranged on the outer peripheral surface of the first cam portion 701, the stitch length adjusting contour 74 is arranged on the outer peripheral surface of the second cam portion 702, and the trimming contour 72 is arranged on the outer peripheral surface of the third cam portion 703, so that the structural arrangement of the presser foot lifting contour 71, the trimming contour 72, the lower feed contour 73 and the stitch length adjusting contour 74 on the cam member 70 is realized.

As shown in fig. 8, the presser foot lifting mechanism 20 of the present embodiment includes a presser foot roller 21, the presser foot lifting contour 71 includes a presser foot base circle section 711, a first presser foot gradually-opening line section 712, and a second presser foot gradually-opening line section 713, and the center of the presser foot base circle section 711 is disposed on the rotation center line of the cam member 70; the presser foot lifting profile 71 can push against the presser foot roller 21 through the first presser foot gradually-opening line section 712 and/or the second presser foot gradually-opening line section 713, so that the presser foot lifting mechanism performs power transmission, and the matching between the presser foot lifting profile 71 and the presser foot lifting mechanism 20 is realized, so that the cam piece 70 can push against the presser foot roller 21 through the presser foot lifting profile 71, and the selective power transmission of the presser foot lifting mechanism 20 is realized.

It should be noted that, when the presser foot roller 21 of the presser foot lifting mechanism 20 abuts against the presser foot base circle segment 711 of the presser foot lifting contour 71, since the center of the presser foot base circle segment 711 is disposed on the rotation center line of the cam member 70, the cam member 70 can only realize the driving of the rotation of the presser foot roller 21 when rotating, and does not perform the swinging driving on the presser foot roller 21, that is, the power transmission on the presser foot lifting mechanism 20 is not realized, and when the presser foot roller 21 abuts against the first presser foot gradually-opening line segment 712 and/or the second presser foot gradually-opening line segment 713, the rotation of the cam member 70 can push the presser foot roller 21 to swing, thereby realizing the power transmission on the presser foot lifting mechanism 20.

As shown in fig. 2, the presser foot lifting mechanism 20 further includes a presser foot lifting crank 22, a connecting hook 23, a lever member 24, a reset ring 25, a presser foot shaft 26, a presser foot arm 27 and a presser foot assembly 28, wherein the presser foot lifting crank 22 and the presser foot shaft 26 are both rotatably mounted on the housing 10, one end of the presser foot shaft 26 is connected to the presser foot assembly 28 through the presser foot arm 27, and the other end of the presser foot shaft 26 is selectively engaged with the lever member 24 through the reset ring 25; the presser foot lifting crank 22 is connected to a lever member 24 via a connecting hook 23, and the presser foot roller 21 is rotatably mounted on an end portion of the presser foot lifting crank 22 remote from the connecting hook 23. It should be noted that the specific structure of the presser foot assembly 28 and how the presser foot assembly 28 is driven by the presser arm 27 to finally realize the presser foot lifting operation of the overedger are conventional structures in the prior art, and will not be described herein.

As can be seen from the above, when the first presser foot gradually-opening line 712 and/or the second presser foot gradually-opening line 713 on the presser foot lifting contour 71 of the cam member 70 abuts against the presser foot roller 21 and rotates, the presser foot lifting crank 22 can be pushed by the presser foot roller 21 to swing on the housing 10, the lever member 24 can be rotated on the presser foot shaft 26 by the connecting hook 23, the rotation of the presser foot shaft 26 on the housing 10 can be realized by the cooperation between the lever member 24 and the reset ring 25 on the presser foot shaft 26, and the driving of the presser foot assembly 28 can be realized under the transmission of the presser foot arm 27.

As shown in fig. 3, the lever member 24 is rotatably mounted on the presser foot shaft 26, wherein the lever member 24 is provided with a pushing protrusion 241, the reset ring 25 is provided with a stopper 251 matching with the pushing protrusion 241, the lever member 24 can drive the pushing protrusion 241 to push the stopper 251, and the presser foot shaft 26 can be driven to rotate relative to the housing 10 by the reset ring 25.

Specifically, when the lever member 24 rotates counterclockwise, the abutting convex portion 241 on the lever member 24 can abut against the stopper 251 and drive the reset ring 25 to rotate counterclockwise, and the counterclockwise rotation of the reset ring 25 does not drive the lever member 24 to rotate; when the reset ring 25 rotates clockwise, the block 251 on the reset ring 25 can push against the pushing convex portion 241 and drive the lever member 24 to rotate clockwise, and the clockwise rotation of the lever member 24 cannot drive the clockwise rotation of the reset ring 25.

As shown in fig. 10, the thread cutting mechanism 30 includes a thread cutting roller 31, the thread cutting contour 72 includes a thread cutting base circle segment 721, a first thread cutting gradually-opened segment 722 and a second thread cutting gradually-opened segment 723, and the center of the thread cutting base circle segment 721 is arranged on the rotation center line of the cam member 70; the trimming contour 72 can push against the trimming roller 31 through the first and/or second trimming gradually-opening segments 722 and 723, so that the trimming mechanism 30 can perform power transmission, and thus the matching between the trimming contour 72 and the trimming mechanism 30 is realized, so that the cam member 70 can push against the trimming roller 31 through the trimming contour 72, and selective power transmission to the trimming mechanism 30 is realized. It should be noted that the working principle of the engagement between the trimming contour 72 of the cam member 70 and the trimming roller 31 abutting on the trimming contour 72 is the same as the working principle of the engagement between the presser foot lifting contour 71 and the presser foot roller 21 abutting on the presser foot lifting contour 71, and will not be described herein.

As shown in fig. 4, the thread trimming mechanism 30 further includes a guide seat 32, a sliding shaft 33, a thread trimming sliding fork 34, a thread trimming connecting rod 35, a thread trimming crank 36 and a thread trimming knife assembly 37, the sliding shaft 33 is slidably mounted on the guide seat 32, the thread trimming sliding fork 34 is mounted on one end portion of the sliding shaft 33 extending out of the guide seat 32, one end of the thread trimming sliding fork 34 is connected to the thread trimming crank 36 through the thread trimming connecting rod 35, the thread trimming roller 31 is rotatably mounted on the other end of the thread trimming sliding fork 34, and the thread trimming knife assembly 37 is mounted on one end of the thread trimming crank 36 far from the thread trimming connecting rod 35. It should be noted that the specific structure of the thread trimmer assembly 37 and how the thread trimmer assembly 37 is driven by the thread trimmer crank 36 to finally implement the thread trimming operation of the overedger are conventional structures in the prior art, and will not be described herein.

As can be seen from the above, when the first gradually-opened trimming segment 722 and/or the second gradually-opened trimming segment 723 on the trimming contour 72 of the cam member 70 abuts against the trimming roller 31 and rotates, the trimming roller 31 can push the trimming sliding fork 34 to swing, and the driving of the trimming knife assembly 37 is realized under the transmission of the trimming connecting rod 35 and the trimming crank 36. It should be noted that, a snap spring (not shown) is snapped on the position of the sliding shaft 33 of the thread trimming mechanism 30 on the guide seat 32, a spring (not shown) is arranged in a pre-compression manner between the snap spring and the guide seat 32, and the elastic force of the spring is utilized to realize the elastic return of the sliding shaft 33, so as to ensure that the thread trimming roller 31 on the thread trimming mechanism 30 always abuts against the thread trimming contour 72 of the cam member 70.

As shown in fig. 5 and 8, the under-tooth supply mechanism 40 includes a lower supply roller 41, the lower supply contour 73 includes a first lower supply base circle segment 731, a lower supply involute segment 732 and a second lower supply base circle segment 733, the center of the first lower supply base circle segment 731 is disposed on the rotation center line of the cam member 70, the lower supply contour 73 can push the lower supply roller 41 through the lower supply involute segment 732 and/or the second lower supply base circle segment 733, so as to enable the under-tooth supply mechanism 40 to perform power transmission, thereby specifically implementing the matching between the lower supply contour 73 and the under-tooth supply mechanism 40, such that the cam member 70 can push the lower supply roller 41 by using the lower supply contour 73, and implementing selective power transmission to the under-tooth supply mechanism 40. It should be noted that a preset distance is provided between the center of the second lower base circle section 733 and the first lower base circle section 731, and the working principle of the cam member 70 between the upper and lower supply profiles 73 and the lower supply roller 41 attached to the lower supply profile 73 is equal to the working principle of the above-mentioned presser foot lifting profile 71 and the presser foot roller 21 attached to the presser foot lifting profile 71, and will not be explained herein.

As shown in fig. 5, the teeth lower supply mechanism 40 includes a connection sleeve 42, a driving shaft 43, a lower supply crank 44 and a rack 45, the connection sleeve 42 is mounted on the housing 10, the driving shaft 43 is disposed through the connection sleeve 42, wherein one end of the driving shaft 43 extending out of the connection sleeve 42 has an eccentric portion 431, the eccentric portion 431 passes through an opening groove 451 of the rack 45, the lower supply crank 44 is mounted on the other end of the driving shaft 43 extending out of the connection sleeve 42, and the lower supply roller 41 is rotatably mounted on the lower supply crank 44. It should be noted that the torsion spring is disposed on the lower supply crank 44, so that the lower supply roller 41 on the lower supply crank 44 can always abut against the lower supply contour 73 of the cam member 70, and the specific structure of the dental articulator 45 and the connection relationship between the dental articulator 45 and other components such as the main shaft 46 are conventional structures in the prior art, and will not be further described herein.

As can be seen from the above, when the lower supply profile 73 of the cam member 70 abuts against the lower supply roller 41 and rotates, the lower supply involute segment 732 and/or the second lower supply base circle segment 733 can abut against the lower supply roller 41 to swing the lower supply crank 44, and the lower supply crank 44 is fixedly connected to the driving shaft 43, so that the driving shaft 43 and the eccentric portion 431 can be driven to rotate, and the eccentric portion 431 is used to drive the dental articulator 45 to move up and down around the main shaft 46 by the eccentric portion 431.

As shown in fig. 6 and 10, the needle pitch adjusting mechanism 50 includes a needle pitch roller 51, the needle pitch adjusting contour 74 includes a first needle pitch base circle section 741, a needle pitch gradually-opening line section 742 and a second needle pitch base circle section 743, and the center of the first needle pitch base circle section 741 is disposed on the rotation center line of the cam member 70; the stitch length adjusting contour 74 can push the stitch length roller 51 by the stitch length gradually-opening line 742 and/or the second stitch length base circle 743, so that the power transmission of the stitch length adjusting mechanism 50 is performed. It should be noted that a certain distance is provided between the center of the second stitch base circle 743 and the center of the first stitch base circle 741, and the working principle of the cooperation between the stitch length adjusting contour 74 on the cam member 70 and the stitch length roller 51 attached to the stitch length adjusting contour 74 is equal to the working principle of the cooperation between the presser foot lifting contour 71 and the presser foot roller 21 attached to the presser foot lifting contour 71, and therefore, the description thereof is omitted here.

As shown in fig. 6, the needle pitch adjusting mechanism 50 includes a spindle motor 52, a cloth feeding assembly 53, a first crank 54, a crank connecting assembly 55, a transmission shaft 56 and a second crank 57, the cloth feeding assembly 53 is mounted on a rotating shaft 521 of the spindle motor 52, wherein the cloth feeding assembly 53 is provided with a needle opening groove 531, one end of the first crank 54 is provided with a needle pitch adjusting piece 541, and the first crank 54 can drive the needle pitch adjusting piece 541 to be clamped into the needle opening groove 531; the other end of the first crank 54 is connected to a transmission shaft 56 through a crank connecting assembly 55, a second crank 57 is mounted on the transmission shaft 56, and the gauge roller 51 is rotatably mounted on the second crank 57. It should be noted that when the needle pitch adjusting piece 541 on the first crank 54 is inserted into the needle opening groove 531 of the cloth feeding assembly 53, the cloth feeding assembly 53 can be in the needle pitch adjusting state, and then the spindle motor 52 drives the cloth feeding assembly 53 to rotate by a certain angle through the rotating shaft 521, so that the needle pitch adjustment of the cloth feeding assembly 53 can be realized, and when the needle pitch adjusting piece 541 on the first crank 54 is separated from the needle opening groove 531 of the cloth feeding assembly 53, the cloth feeding assembly 53 is in the needle pitch locking state. It should be noted that a torsion spring (not shown) is further disposed on the needle pitch adjusting mechanism 50, and the torsion spring may be disposed on one of the transmission components of the needle pitch adjusting mechanism 50, so that the needle pitch roller 51 of the needle pitch adjusting mechanism 50 can always abut against the needle pitch adjusting contour 74 of the cam member 70 by using the elastic action of the torsion spring.

As can be seen from the above, when the needle pitch gradually-opening line 742 and/or the second needle pitch base circle 743 on the needle pitch adjusting contour 74 of the cam member 70 abut against the needle pitch roller 51 and rotate, the second crank 57 can be pushed by the needle pitch roller 51 to swing, the rotating drive of the transmission shaft 56 is realized, then the first crank 54 is swung under the transmission of the crank connecting assembly 55, and the purpose of controlling the needle pitch adjusting piece 541 on the first crank 54 to selectively block into the needle opening groove 531 on the cloth feeding assembly 53 is achieved.

As shown in fig. 7, the crank connecting assembly 55 includes a third crank 551, a crank connecting rod 552, a fourth crank 553, and a mounting shaft 554, wherein one end of the third crank 551 is mounted on the transmission shaft 56 at an end away from the second crank 57, the other end of the third crank 551 is connected to the fourth crank 553 through the crank connecting rod 552, the mounting shaft 554 is rotatably mounted on the housing 10, and the fourth crank 553 and the first crank 54 are respectively connected to the mounting shaft 554, thereby realizing the structural arrangement of the crank connecting assembly 55.

It can be understood that in the operation of the overedger of the present embodiment, the cam member 70 has a zero starting position, so that the presser foot roller 21 of the presser foot lifting mechanism 20 abuts on the presser foot base circle section 711 of the presser foot lifting profile 71 on the cam member 70, the thread trimming roller 31 of the thread trimming mechanism 30 abuts on the thread trimming base circle section 721 of the thread trimming profile 72 on the cam member 70, the lower supply roller 41 of the under-tooth supply mechanism 40 abuts on the first lower supply base circle section 731 of the upper and lower supply profiles 73 on the cam member 70, and the pitch roller 51 of the pitch adjusting mechanism 50 abuts on the first pitch base circle section 741 of the pitch adjusting profile 74 on the cam member 70, that is, when the presser foot lifting, thread trimming, under-tooth supply and pitch adjustment of the overedger are not in operation.

When the hemming machine needs to lift the presser foot, the rotary driving part 60 drives the cam part 70 to rotate anticlockwise from the initial zero position, so that the first presser foot gradually-opening line segment 712 and the second presser foot gradually-opening line segment 713 of the presser foot lifting outline 71 on the cam part 70 sequentially push the presser foot roller 21, and the power of the presser foot lifting mechanism 20 on the hemming machine is transmitted and the presser foot lifting operation is carried out; in this process, the thread trimming base circle section 721 of the thread trimming contour 72 on the cam member 70 always abuts against the thread trimming roller 31, the first lower base circle section 731 of the lower supply contour 73 always abuts against the lower supply roller 41, and the first stitch length base circle section 741 of the stitch length adjusting contour 74 always abuts against the stitch length roller, that is, when the thread trimming, the tooth lower supply and the stitch length adjustment of the overedger are not operated. It should be noted that when the first presser foot gradually-opening line segment 712 of the cam member 70 abuts against the presser foot roller 21, the presser foot lifting mechanism 20 performs power transmission to change the height of the presser foot, and when the second presser foot gradually-opening line segment 713 of the cam member 70 abuts against the presser foot roller 21, the presser foot lifting mechanism 20 performs power transmission to maintain the height position of the presser foot.

When the overedger needs to cut threads, the rotary driving piece 60 drives the cam piece 70 to rotate clockwise, so that the first thread-cutting gradually-opening segment 722 and the second thread-cutting gradually-opening segment 723 of the thread-cutting outline 72 on the cam piece 70 sequentially push against the thread-cutting roller 31, and the power of the thread-cutting mechanism 30 on the overedger is transmitted to carry out thread-cutting operation; similarly, in the process, the pressure raising and pressing foot, the tooth lower supply and the needle distance adjustment of the overedger do not work. It should be noted that when the first gradually-cut line segment 722 of the trimming contour 72 on the cam member 70 pushes against the trimming roller 31, the trimming mechanism 30 performs power transmission and realizes a change in the trimming position, and when the second gradually-cut line segment 723 of the trimming contour 72 on the cam member 70 pushes against the trimming roller 31, the trimming mechanism 30 performs power transmission and realizes a retention of the trimming position.

When the overedger needs lower supply of teeth, on the basis that the operation of lifting the presser foot is completed by the overedger, the rotary driving piece 60 drives the cam piece 70 to rotate anticlockwise, so that the lower involute section 732 and the second lower base circle section 733 of the upper and lower supply contour 73 of the cam piece 70 sequentially push the lower supply roller 41, and the upper tooth lower supply mechanism 40 of the overedger is enabled to transmit power and perform lower supply operation; in the same way, the overlock sewing machine does not work when lifting the presser foot, cutting the thread and adjusting the stitch length. It should be noted that the upper presser foot lifting contour 71 and the lower presser foot supplying contour 73 of the cam member 70 are disposed on the same plane, and a space-avoiding section is formed between the second presser foot gradually-opening line section 713 on the upper presser foot lifting contour 71 and the first lower base circle section 731 on the lower presser foot supplying contour 73, which will not be explained herein.

It should be noted that when the lower involute section 732 of the upper and lower supply contour 73 of the cam member 70 pushes against the lower supply roller 41, the under-teeth supply mechanism 40 performs power transmission and realizes the change of the lower supply position of the dental articulator 45, and when the second lower base circular section 733 of the upper and lower supply contour 73 of the cam member 70 pushes against the lower supply roller 41, the under-teeth supply mechanism 40 performs power transmission and realizes the maintenance of the lower supply position of the dental articulator 45.

When the needle pitch of the overedger needs to be adjusted, the rotary driving member 60 of the overedger continues to drive the cam member 70 to rotate counterclockwise on the basis of the lower supply operation, or the rotary driving member 60 of the overedger continues to drive the cam member 70 to rotate clockwise on the basis of the thread trimming operation, so that the gradually opened needle pitch segment 742 and the second basic needle pitch circle segment 743 of the needle pitch adjusting profile 74 on the cam member 70 sequentially push the needle pitch roller 51, and the needle pitch adjusting mechanism 50 works and adjusts the needle pitch; similarly, in the process, the thread trimming mechanism 30 of the overedger does not operate, and the presser foot lifting mechanism 20 and the under-tooth feeding mechanism 40 are both in the operation completion state.

In conclusion, the overedger of the utility model can realize automatic control of the presser foot lifting, the thread trimming, the lower supply and the needle pitch adjustment by controlling different rotation angles by one rotary driving piece 60 through the reasonable structural arrangement, and has the functions of simplifying the structure and reducing the cost.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications to the above embodiments are within the scope of the claimed invention as long as they are within the spirit of the present invention.

Claims (10)

1. A overedger comprises a machine shell (10), a presser foot lifting mechanism (20), a thread trimming mechanism (30), a tooth lower supply mechanism (40) and a needle pitch adjusting mechanism (50), wherein the presser foot lifting mechanism (20), the thread trimming mechanism (30), the tooth lower supply mechanism (40) and the needle pitch adjusting mechanism (50) are all arranged on the machine shell (10);

the method is characterized in that: the overedger further comprises a rotating driving part (60) and a cam part (70), wherein the cam part (70) is arranged on a rotating part (61) of the rotating driving part (60), and the cam part (70) is provided with a presser foot lifting contour (71) corresponding to the presser foot lifting mechanism (20), a thread trimming contour (72) corresponding to the thread trimming mechanism (30), a lower supply contour (73) corresponding to the tooth lower supply mechanism (40) and a needle pitch adjusting contour (74) corresponding to the needle pitch adjusting mechanism (50);

the rotary driving part (60) can drive the cam part (70) to rotate through the rotary part (61), so that the presser foot lifting profile (71), the thread trimming profile (72), the lower supply profile (73) and the needle pitch adjusting profile (74) can drive the corresponding presser foot lifting mechanism (20), the thread trimming mechanism (30), the tooth lower supply mechanism (40) and the needle pitch adjusting mechanism (50) to act.

2. The overlock machine according to claim 1, wherein: the cam member (70) comprises a first cam portion (701), a second cam portion (702) and a third cam portion (703), and the rotation center line of the first cam portion (701), the rotation center line of the second cam portion (702) and the rotation center line of the third cam portion (703) are arranged on the same straight line; the pressure raising and lowering contour (71) and the lower supply contour (73) are provided on the outer peripheral surface of the first cam portion (701), the needle pitch adjustment contour (74) is provided on the outer peripheral surface of the second cam portion (702), and the thread trimming contour (72) is provided on the outer peripheral surface of the third cam portion (703).

3. The overlock machine of claim 1, wherein: the presser foot lifting mechanism (20) comprises a presser foot roller (21), the presser foot lifting outline (71) comprises a presser foot base circle section (711), a first presser foot gradually-opening line section (712) and a second presser foot gradually-opening line section (713), and the circle center of the presser foot base circle section (711) is arranged on the rotation central line of the cam piece (70); the presser foot lifting contour (71) can push the presser foot roller (21) through the first presser foot gradually-opening line segment (712) and/or the second presser foot gradually-opening line segment (713) so that the presser foot lifting mechanism (20) can carry out power transmission.

4. The overlock machine of claim 3, wherein: the presser foot lifting mechanism (20) further comprises a presser foot lifting crank (22), a connecting hook (23), a lever member (24), a reset ring (25), a presser foot shaft (26), a presser foot arm (27) and a presser foot assembly (28), wherein the presser foot lifting crank (22) and the presser foot shaft (26) are both rotatably mounted on the machine shell (10), one end of the presser foot shaft (26) is connected to the presser foot assembly (28) through the presser foot arm (27), and the other end of the presser foot shaft (26) is selectively matched with the lever member (24) through the reset ring (25); the presser foot lifting crank (22) is connected with the lever member (24) through the connecting hook (23), and the presser foot roller (21) is rotatably arranged on one end part of the presser foot lifting crank (22) far away from the connecting hook (23).

5. The overlock machine of claim 1, wherein: the thread trimming mechanism (30) comprises a thread trimming roller (31), the thread trimming contour (72) comprises a thread trimming base circle section (721), a first thread trimming gradually-opening line section (722) and a second thread trimming gradually-opening line section (723), and the circle center of the thread trimming base circle section (721) is arranged on the rotation central line of the cam piece (70); the thread cutting outline (72) can push the thread cutting roller (31) through the first thread cutting gradually-opening segment (722) and/or the second thread cutting gradually-opening segment (723) so that the thread cutting mechanism (30) can transmit power.

6. The overlock machine of claim 5, wherein: the trimming mechanism (30) further comprises a guide seat (32), a sliding shaft (33), a trimming sliding fork (34), a trimming connecting rod (35), a trimming crank (36) and a trimming cutter assembly (37), wherein the sliding shaft (33) is slidably installed on the guide seat (32), the trimming sliding fork (34) is installed on the sliding shaft (33) extending out of one end of the guide seat (32), one end of the trimming sliding fork (34) is connected to the trimming crank (36) through the trimming connecting rod (35), the trimming roller (31) is rotatably installed on the other end of the trimming sliding fork (34), and the trimming cutter assembly (37) is installed on the trimming crank (36) and far away from one end of the trimming connecting rod (35).

7. The overlock machine according to claim 1, wherein: the tooth lower supply mechanism (40) comprises a lower supply roller (41), the lower supply contour (73) comprises a first lower supply base circle section (731), a lower supply gradually-opening line section (732) and a second lower supply base circle section (733), the first lower supply base circle section (731) is arranged on the rotation central line of the cam member (70), and the lower supply contour (73) can push the lower supply roller (41) through the lower supply gradually-opening line section (732) and/or the second lower supply base circle section (733) so that the tooth lower supply mechanism (40) can transmit power.

8. The overlock machine of claim 7, wherein: the tooth lower supply mechanism (40) comprises a connecting sleeve (42), a driving shaft (43), a lower supply crank (44) and a tooth rack (45), wherein the connecting sleeve (42) is mounted on the machine shell (10), the driving shaft (43) penetrates through the connecting sleeve (42), one end, extending out of the connecting sleeve (42), of the driving shaft (43) is provided with an eccentric part (431), and the eccentric part (431) penetrates through an opening groove (451) of the tooth rack (45); the lower supply crank (44) is arranged at the other end of the driving shaft (43) extending out of the connecting sleeve (42), and the lower supply roller (41) is rotatably arranged on the lower supply crank (44).

9. The overlock machine according to claim 1, wherein: the needle pitch adjusting mechanism (50) comprises a needle pitch roller (51), the needle pitch adjusting contour (74) comprises a first needle pitch base circle section (741), a needle pitch gradually-opening line section (742) and a second needle pitch base circle section (743), and the center of the first needle pitch base circle section (741) is arranged on the rotation center line of the cam piece (70); the needle pitch adjusting contour (74) can push the needle pitch roller (51) through the needle pitch gradually-opening line segment (742) and/or the second needle pitch base circle segment (743), so that the needle pitch adjusting mechanism (50) can transmit power.

10. The overlock machine of claim 9, wherein: the needle pitch adjusting mechanism (50) comprises a spindle motor (52), a cloth feeding assembly (53), a first crank (54), a crank connecting assembly (55), a transmission shaft (56) and a second crank (57), wherein the cloth feeding assembly (53) is installed on a rotating shaft part (521) of the spindle motor (52), a needle opening groove (531) is formed in the cloth feeding assembly (53), a needle pitch adjusting piece (541) is arranged at one end of the first crank (54), and the first crank (54) can drive the needle pitch adjusting piece (541) to be clamped into the needle opening groove (531); the other end of the first crank (54) is connected with the transmission shaft (56) through the crank connecting assembly (55), the second crank (57) is installed on the transmission shaft (56), and the needle pitch roller (51) is rotatably installed on the second crank (57).

Images