CN112981739A - Overedger and eccentric adjustable structure of lifting tooth thereof - Google Patents
Overedger and eccentric adjustable structure of lifting tooth thereof Download PDFInfo
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- CN112981739A CN112981739A CN201911282588.3A CN201911282588A CN112981739A CN 112981739 A CN112981739 A CN 112981739A CN 201911282588 A CN201911282588 A CN 201911282588A CN 112981739 A CN112981739 A CN 112981739A
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- sliding
- eccentric
- adjusting
- shaft
- lifting
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/24—Feed-dog lifting and lowering devices
Abstract
The invention provides a feed lifting eccentric adjustable structure, which comprises a main shaft with a main feed lifting shaft section, a tooth rack with a feed lifting chute, a feed lifting slide block matched with the feed lifting chute, an adjusting eccentric wheel, a fixed wheel fixed on the main feed lifting shaft section, an adjusting sleeve and a sliding sleeve, wherein the feed lifting slide block is arranged on the main feed lifting shaft section; the adjusting eccentric wheel is provided with an adjusting eccentric shaft section which is rotatably arranged on the periphery of the main feed lifting shaft section; the adjusting sleeve is rotatably arranged on the periphery of the adjusting eccentric shaft section; the sliding sleeve is sleeved on the periphery of the adjusting sleeve and is in sliding fit in the first direction, and the sliding sleeve is in sliding fit with the fixed wheel in the second direction; the tooth lifting sliding block is rotatably arranged on the periphery of the sliding sleeve; when the height of the lifting tooth is adjusted, the adjusting eccentric wheel is static, the main shaft rotates, the sliding sleeve and the fixed wheel slide relatively in the second direction, and the sliding sleeve and the adjusting sleeve slide relatively in the first direction, the eccentric distance of the lifting tooth between the matching center of the sliding sleeve and the sliding block of the lifting tooth and the rotating center of the main shaft is changed, the height of the lifting tooth is adjusted, and the applicability of the overedger is improved.
Description
Technical Field
The invention relates to a feed lifting eccentric adjustable structure of an overedger.
The invention also relates to an overedger comprising the eccentric adjustable structure of the lifting tooth.
Background
At present, a main shaft, a tooth frame, a feeding tooth fixedly arranged on the tooth frame, a feeding mechanism and a tooth lifting mechanism are arranged in an overedger, the main shaft drives the tooth frame and the feeding tooth to do reciprocating motion back and forth in the horizontal direction through the feeding mechanism, the main shaft drives the tooth frame and the feeding tooth to do reciprocating motion up and down in the vertical direction through the tooth lifting mechanism, so that the feeding tooth does the composite motion of reciprocating motion back and forth and reciprocating motion up and down, and the motion trail of the feeding tooth is similar to an ellipse. Such as: the utility model discloses a cup seaming machine disclosed in the Chinese utility model patent specification with the application number of 200420037700. X; the feed lifting mechanism in the overedger comprises a feed lifting eccentric shaft section arranged on a main shaft, a feed lifting chute arranged in a feed frame and a feed lifting slide block, wherein the feed lifting slide block is rotatably sleeved on the periphery of the feed lifting eccentric shaft section and is in sliding fit with the feed lifting chute. However, this overlock sewing machine has the following drawbacks: the eccentric shaft section of the feed lifting teeth and the main shaft are of an integrated structure, the eccentric amount of the feed lifting teeth between the eccentric shaft section of the feed lifting teeth and the main shaft is a fixed value, and the height of the feed lifting teeth cannot be adjusted. The feed tooth lifting height refers to: and when the feeding teeth move to the highest point in the up-down direction, the distance between the feeding teeth and the upper surface of the needle plate is reduced. In practical application, the overedger with non-adjustable feed lifting height cannot meet the requirements of diversified, diversified and high-quality sewing processes in the prior art, sewing defects such as dislocation of sewing materials on an upper layer and a lower layer, incapability of simultaneously meeting knitting and tatting requirements of the same overedger, no crease of the sewing materials, low cloth feeding efficiency and the like easily occur, and therefore the overedger with non-adjustable feed lifting height has a very narrow application range.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a feed lifting tooth eccentric adjustable structure of an overlock machine, which can adjust the height of a feed lifting tooth.
In order to achieve the purpose, the invention provides a feed lifting eccentric adjustable structure of an overedger, which comprises a main shaft with a main feed lifting shaft section, a tooth rack with a feed lifting chute, a feed lifting slide block in sliding fit with the feed lifting chute, an adjusting eccentric wheel, a fixed wheel fixed on the main feed lifting shaft section, an adjusting sleeve and a sliding sleeve; the adjusting eccentric wheel is provided with an adjusting eccentric shaft section which is eccentric to the main feed lifting shaft section, and the adjusting eccentric shaft section is rotatably arranged on the periphery of the main feed lifting shaft section; the adjusting sleeve is rotatably arranged on the periphery of the adjusting eccentric shaft section; the sliding sleeve is sleeved on the periphery of the adjusting sleeve and is in sliding fit with the adjusting sleeve in a first direction, the sliding sleeve is also in sliding fit with the fixed wheel in a second direction, and the first direction is intersected with the second direction; the tooth lifting sliding block is rotatably arranged on the periphery of the sliding sleeve; during sewing, the main feed lifting tooth shaft section of the main shaft and the adjusting eccentric wheel are relatively static; when the height of the lifting tooth is adjusted, the adjusting eccentric wheel is still, the main shaft rotates, the sliding sleeve and the fixed wheel slide relatively in the second direction, and the sliding sleeve and the adjusting sleeve slide relatively in the first direction, so that the eccentric distance of the lifting tooth between the matching center of the sliding sleeve and the sliding block of the lifting tooth and the rotating center of the main shaft is changed.
Further, the fixed wheel is a feeding eccentric wheel in a feeding mechanism of the overedger.
Furthermore, the outer peripheral surface of the adjusting sleeve is provided with an outer sliding surface extending along the first direction, the inner peripheral surface of the sliding sleeve is provided with an inner sliding surface extending along the first direction, and the outer sliding surface is in contact with the inner sliding surface and is in sliding fit with the inner sliding surface.
Furthermore, the inner sliding surfaces of the sliding sleeve are arranged along the circumferential direction of the inner circumferential surface of the sliding sleeve, and the matching center of the sliding sleeve and the tooth lifting sliding block and the symmetrical center line of the two inner sliding surfaces of the sliding sleeve are eccentrically arranged.
Further, the second direction is radial direction of the sliding sleeve; the tip of tight pulley is equipped with slider portion, the tip of sliding sleeve is equipped with the radial spout that extends along the second direction, slider portion is located radial spout, both sliding fit, be surface contact between the cell wall of slider portion and radial spout.
Furthermore, the adjusting eccentric wheel is provided with a connecting shaft section which is concentric with the main feed lifting shaft section, the connecting shaft section is connected with the adjusting eccentric shaft section, the fixed wheel sleeve is arranged on the periphery of the connecting shaft section and fixed on the main feed lifting shaft section through a fixed screw, a through groove which is radially through and circumferentially extends is formed in the connecting shaft section, and the fixed screw penetrates through the through groove.
Furthermore, the eccentric adjustable structure of the lifting teeth further comprises a ratchet wheel fixed on the main shaft section of the lifting teeth, a sliding piece with a pawl part and a clutch driving mechanism, wherein a wheel disc part is arranged at one end, away from the eccentric shaft section, of the connecting shaft section of the adjusting eccentric wheel, a clutch sliding groove is arranged on the end face, back to the connecting shaft section, of the wheel disc part, and the sliding piece is located in the clutch sliding groove and is in sliding fit with the clutch sliding groove; when sewing, the clutch driving mechanism does not act on the sliding piece, and the pawl part is meshed with the ratchet wheel; when the height of the lifting tooth is adjusted, the clutch driving mechanism acts on the sliding piece and pushes against the wheel disc part, and the sliding piece moves in the clutch sliding groove along the direction that the pawl part is separated from the ratchet wheel until the pawl part is separated from the ratchet wheel.
Furthermore, an abutting notch is formed in the periphery of the wheel disc part, a pushing part is arranged on the peripheral surface of the sliding piece at the abutting notch, and the pushing part and the pawl part are oppositely arranged in the extending direction of the clutch sliding chute; when the pawl portion is engaged with the ratchet wheel, the pushing portion is higher than the bottom of the abutting notch and lower than the outer peripheral surface of the wheel disc portion.
Further, a reset torsion spring is fixedly mounted on the end face of the wheel disc part back to the connecting shaft section, and one end of the reset torsion spring is abutted to the pawl part.
Furthermore, a first limiting boss is fixed on the ratchet wheel, two second limiting bosses which are distributed circumferentially are fixed on the end face of the wheel disc part, which is back to the connecting shaft section, and the first limiting boss is located between the two second limiting bosses and can be abutted against the second limiting bosses.
Furthermore, the clutch driving mechanism comprises a fixed seat fixed with the shell of the overedger and an adjusting driving shaft movably arranged in the fixed seat in a penetrating way, and the adjusting driving shaft is right opposite to the wheel disc part and can move towards the direction close to or far away from the wheel disc part.
Furthermore, the clutch driving mechanism further comprises a baffle fixed on the fixed seat, the adjusting driving shaft comprises a shaft body part, a shaft pressing part arranged at one end, far away from the wheel disc part, of the shaft body part, and a shaft limiting flange arranged at the joint of the shaft pressing part and the shaft body part, a first connecting hole matched with the shaft body part and a second connecting hole matched with the shaft pressing part are arranged in the fixed seat, a third connecting hole matched with the shaft pressing part is arranged in the baffle, the shaft limiting flange is accommodated in the second connecting hole, and the outer diameter of the shaft limiting flange is larger than the diameters of the first connecting hole and the third connecting hole and smaller than the diameter of the second connecting hole.
Furthermore, the clutch driving mechanism further comprises a return spring sleeved on the shaft body part, a first retaining ring fixed on the shaft body part and a second retaining ring fixed in the first connecting hole, and two ends of the return spring are abutted to the first retaining ring and the second retaining ring.
The application also provides an overedger, wherein the eccentric adjustable structure of the lifting tooth is arranged in the overedger.
As mentioned above, the eccentric adjustable structure of the lifting tooth and the overedger provided by the invention have the following beneficial effects:
the utility model provides a sliding sleeve and the cooperation center of lifting tooth slider in this application, with the main shaft rotation center between the lifting tooth eccentricity adjustable to when can adjusting the main shaft operation, the main shaft is through adjusting eccentric shaft section, adjusting collar and sliding sleeve drive lifting tooth slider up-and-down motion's motion range, and then realizes lifting the regulation of tooth height, promotes the suitability of overedger greatly, makes the overedger can satisfy different sewing materials and make up the demand of technology betterly.
Drawings
FIG. 1 is a schematic structural view of an overlock machine according to the present application.
Fig. 2 and 3 are schematic structural diagrams of the eccentric adjustable structure of the feed lifting tooth in the application, wherein a tooth rack and a feed feeding tooth are omitted in fig. 3.
Fig. 4 is an exploded view of fig. 3 with the clutch drive mechanism omitted.
Fig. 5 to 7 are schematic structural diagrams of fig. 4 with the spindle omitted and at different viewing angles.
Fig. 8 and 9 are schematic structural views of the adjusting eccentric wheel in different viewing angles.
Fig. 10 and 11 are schematic structural diagrams of the sliding sleeve in the present application at different viewing angles.
Fig. 12 and 13 are schematic structural diagrams of a clutch driving mechanism in the application at different viewing angles, wherein fig. 13 is a sectional view along a-a in fig. 12.
Description of the element reference numerals
1 case
2 spindle
21 main feed lifting tooth shaft section
3 dental articulator
4 lifting tooth slide block
5 adjusting eccentric wheel
51 adjusting eccentric shaft section
52 connecting the shaft sections
53 through groove
54 wheel disc part
55 clutch chute
56 abutting notch
57 second limit boss
6 fixed wheel
61 slider part
7 adjusting sleeve
71 outer sliding surface
8 sliding sleeve
81 inner sliding surface
82 radial sliding groove
83 lifting tooth connecting section
9 set screw
10 ratchet wheel
101 first limit boss
11 sliding vane
111 pawl part
112 pushing part
12 reset torsion spring
13 fixed seat
131 first connection hole
132 second connecting hole
133 limiting step part
14 adjusting drive shaft
141 shaft body part
142 axle pressing part
143 axle limit flange
15 baffle
151 third connection hole
16 return spring
17 first retainer ring
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.
The present application provides an overlock machine, as shown in fig. 1, having a housing 1, a main shaft 2 rotatably mounted in the housing 1, and a main motor driving the main shaft 2 to rotate. For convenience of description, in the following examples, the directions are defined as follows: defining the axial direction of the main shaft 2 as a left-right direction, wherein the direction of the main shaft 2 towards the head (namely the needle side) of the sewing machine is a left direction, and the direction of the main shaft 2 towards the tail of the sewing machine is a right direction; defining the moving direction of the sewing material when the sewing machine is used for sewing as a front direction; a direction orthogonal to both the left-right direction and the front-rear direction is defined as an up-down direction.
Furthermore, the overedger is provided with a tooth lifting eccentric adjustable structure for adjusting the tooth lifting height of the feeding tooth. As shown in fig. 2 to 7, the eccentric adjustable structure of the feed lifting teeth related to the present application includes a main shaft 2 extending left and right, a tooth rack 3 having a feed lifting teeth sliding groove extending front and back, a feed lifting teeth sliding block 4 sliding-fitted with the feed lifting teeth sliding groove, an adjusting eccentric wheel 5, a fixed wheel 6, an adjusting sleeve 7, and a sliding sleeve 8, wherein the adjusting eccentric wheel 5, the fixed wheel 6, the adjusting sleeve 7, and the sliding sleeve 8 all extend axially in the left and right direction; a feeding tooth in the overedger is fixedly arranged at the rear end of the tooth frame 3; the left section part of the main shaft 2 is a main feed lifting tooth shaft section 21 which is concentric with the rotation center of the main shaft 2, and the fixed wheel 6 is fixedly arranged on the periphery of the main feed lifting tooth shaft section 21; the adjusting eccentric wheel 5 is provided with an adjusting eccentric shaft section 51 which is eccentric to the main feed lifting teeth shaft section 21 and extends left and right, the adjusting eccentric shaft section 51 is rotatably arranged on the periphery of the main feed lifting teeth shaft section 21, and the adjusting eccentric shaft section 51 is in rotating fit with the main feed lifting teeth shaft section 21; the adjusting sleeve 7 is rotatably arranged on the periphery of the adjusting eccentric shaft section 51, and the adjusting sleeve 7 is in rotating fit with the adjusting eccentric shaft section 51; the sliding sleeve 8 is sleeved on the periphery of the adjusting sleeve 7 and is in sliding fit with the adjusting sleeve in a first direction, the sliding sleeve 8 is also in sliding fit with the fixed wheel 6 in a second direction, and the first direction is intersected with the second direction; the feed lifting sliding block 4 is rotatably arranged on the periphery of the sliding sleeve 8, and the feed lifting sliding block 4 is in rotating fit with the sliding sleeve 8. Along the radial direction of the main feed dog shaft section 21 of the main shaft 2, the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5, the adjusting sleeve 7, the sliding sleeve 8 and the feed dog sliding block 4 are sleeved in sequence from inside to outside. Along the axial of main shaft 2, tight pulley 6 and sliding sleeve 8 are arranged about, and the right-hand member portion of sliding sleeve 8 and tooth lifting slider 4 normal running fit. Preferably, the part of the sliding sleeve 8 rotationally engaged with the tooth lifting slider 4 is defined as a tooth lifting connecting section 83, and the center of the tooth lifting connecting section 83 is also the center of engagement of the sliding sleeve 8 with the tooth lifting slider 4. The sliding sleeve 8 and the adjusting sleeve 7 are in sliding fit in the first direction, so the sliding sleeve 8 has a sliding symmetry center line L parallel to the first direction, and the sliding symmetry center line L is a symmetry center line of a pair of sliding parts in sliding fit with the adjusting sleeve 7 on the inner periphery of the sliding sleeve 8.
When the overedger sews, the main feed lifting tooth shaft section 21 of the main shaft 2 and the adjusting eccentric wheel 5 are relatively static, the adjusting eccentric shaft section 51, the adjusting sleeve 7 and the sliding sleeve 8 are relatively static, and the feed lifting tooth eccentric distance between the matching center of the sliding sleeve 8 and the feed lifting tooth sliding block 4 and the rotating center of the main shaft 2 is kept unchanged; the main motor drives the main shaft 2 to rotate, the main tooth lifting shaft section 21 rotates along with the main shaft 2, the main tooth lifting shaft section 21 drives the fixed wheel 6 and the adjusting eccentric wheel 5 to rotate together, the adjusting eccentric shaft section 51 is eccentric to the rotating center of the main shaft 2, so that the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 rotates around the rotating center of the main shaft 2, the adjusting sleeve 7 and the sliding sleeve 8 are driven to rotate around the rotating center of the main shaft 2, the sliding sleeve 8 drives the tooth lifting slide block 4 to move in the front-back direction and the up-down direction, the tooth lifting slide block 4 moves in the front-back direction and is released through the tooth lifting sliding groove, the tooth rack 3 and the feeding tooth are driven to reciprocate up and down in the direction perpendicular to the tooth lifting sliding groove, and the feeding tooth performs tooth lifting action. The feed dog forms a stable feed by exposing a part of the upper surface of the needle plate during the feed dog lifting process.
When the tooth lifting height of the feeding tooth needs to be adjusted, the adjusting eccentric wheel 5 is still, at the moment, the main shaft 2 is rotated, the main shaft 2 drives the fixed wheel 6 to rotate together, the sliding sleeve 8 and the fixed wheel 6 relatively slide in the second direction, and the sliding sleeve 8 and the adjusting sleeve 7 relatively slide in the first direction, so that a connecting line of a central point of the outer peripheral surface of the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 and a central point of the inner peripheral surface and a relative angle between the adjusting eccentric shaft section and a sliding symmetrical central line L of the sliding sleeve 8 are changed, and the tooth lifting eccentric distance between the matching center of the sliding sleeve 8 and the tooth lifting sliding block 4 and the rotating center of the main shaft 2 is changed. Therefore, the matching center of the sliding sleeve 8 and the tooth lifting sliding block 4 in the application and the tooth lifting eccentricity between the rotating centers of the main shaft 2 are adjustable, so that when the main shaft 2 can be adjusted to operate, the main shaft 2 drives the tooth lifting sliding block 4 to move up and down in a reciprocating manner by adjusting the eccentric shaft section 51, the adjusting sleeve 7 and the sliding sleeve 8, the adjustment of the tooth lifting height is realized, the applicability of the overedger is greatly improved, and the overedger can better meet the requirements of different sewing materials and sewing processes.
Preferably, the fixed wheel 6 in the application adopts a feeding eccentric wheel in a feeding mechanism of the overedger, so that the overall structure of the overedger can be optimized.
Further, as shown in fig. 6, 10 and 11, an outer sliding surface 71 extending in the first direction is provided on an outer peripheral surface of the adjustment sleeve 7, an inner sliding surface 81 extending in the first direction is provided on an inner peripheral surface of the sliding sleeve 8, the outer sliding surface 71 is in contact with and slidably engaged with the inner sliding surface 81, and the outer sliding surface 71 is also in surface contact with the inner sliding surface 81. In the first direction, the extension length of the outer sliding surface 71 of the outer periphery of the adjusting sleeve 7 is smaller than the extension length of the inner sliding surface 81 of the inner periphery of the sliding sleeve 8, and the inner cavity surrounded by the inner periphery of the sliding sleeve 8 allows the relative sliding between the adjusting sleeve 7 and the sliding sleeve 8 in the first direction. Two outer sliding surfaces 71 on the periphery of the adjusting sleeve 7 are arranged along the peripheral surface of the adjusting sleeve 7 in the circumferential direction; accordingly, two inner sliding surfaces 81 of the sliding sleeve 8 are circumferentially arranged along the inner circumferential surface of the sliding sleeve 8, the inner sliding surfaces 81 of the sliding sleeve 8 are sliding portions of the above-mentioned sliding sleeve 8, and a symmetric center line parallel to the first direction is provided between the two inner sliding surfaces 81 of the sliding sleeve 8, and the symmetric center line is also a sliding symmetric center line L of the above-mentioned sliding sleeve 8. Preferably, the sliding sleeve 8 in the present application has two preferred embodiments: in the first embodiment, the lifting tooth connecting section 83 of the sliding sleeve 8 is concentrically arranged with the symmetric center line of the sliding sleeve 8, that is, the matching center of the sliding sleeve 8 and the lifting tooth sliding block 4 is on the symmetric center line of the sliding sleeve 8, and at this time, the sliding sleeve 8 is a non-eccentric sliding sleeve 8; in the second embodiment, the lifting tooth connecting section 83 of the sliding sleeve 8 and the symmetric center line of the sliding sleeve 8 are eccentrically arranged, that is, the matching center of the sliding sleeve 8 and the lifting tooth sliding block 4 is not on the symmetric center line of the sliding sleeve 8, at this time, the sliding sleeve 8 is an eccentric sliding sleeve 8, and the adjusting range of the lifting tooth eccentric distance between the matching center of the sliding sleeve 8 and the lifting tooth sliding block 4 and the rotation center of the main shaft 2 can be increased, so that the adjusting range of the lifting tooth height of the feeding tooth is increased.
Further, as shown in fig. 5 and 6, and fig. 10 and 11, the second direction is a radial direction of the sliding sleeve 8; the right-hand member of tight pulley 6 is equipped with slider portion 61, and the left end of sliding sleeve 8 is equipped with the radial spout 82 that extends along the second direction, and slider portion 61 is located radial spout 82, both sliding fit, is the face contact between the cell wall of slider portion 61 and radial spout 82, realizes tight pulley 6 and sliding sleeve 8 sliding fit in the second direction from this.
Further, as shown in fig. 5 to 7, and fig. 8 and 9, the adjusting eccentric wheel 5 further has a wheel disc portion 54 and a connecting shaft portion 52, the wheel disc portion 54, the connecting shaft portion 52 and the adjusting eccentric shaft portion 51 are sequentially connected from left to right, the connecting shaft portion 52 is concentrically disposed with the main tooth lifting shaft portion 21 of the main shaft 2, the fixed wheel 6 is sleeved on the periphery of the connecting shaft portion 52 and fixed to the main tooth lifting shaft portion 21 by a fixing screw 9, the fixed wheel 6 and the connecting shaft portion 52 are coaxially matched, a through groove 53 is formed in the connecting shaft portion 52, the through groove 53 penetrates through the connecting shaft portion 52 in the radial direction of the connecting shaft portion 52 and extends in the circumferential direction of the connecting shaft portion 52, and the fixing screw 9 penetrates through the through groove 53 and can relatively move in the through groove 53 in the extending direction of the through groove 53.
Further, as shown in fig. 3 to 7, the eccentric adjustable structure of the lifting teeth further includes a ratchet 10, a sliding piece 11 having a pawl portion 111, and a clutch driving mechanism, the ratchet 10 is fixed at the left end of the main lifting teeth shaft section 21 by a screw and is located at the left side of the adjusting eccentric wheel 5, a clutch sliding slot 55 is provided on the left end surface of the wheel disc portion 54 of the adjusting eccentric wheel 5, and the sliding piece 11 is located in the clutch sliding slot 55 and is in sliding fit with the clutch sliding slot 55. During sewing, the clutch driving mechanism does not act on the sliding piece 11, the pawl part 111 is meshed with the ratchet wheel 10, the main shaft 2 drives the ratchet wheel 10 to rotate together, the sliding piece 11 is driven to rotate together through the meshing of the ratchet wheel 10 and the pawl part 111, and the adjusting eccentric wheel 5 is driven to rotate together through the sliding fit of the sliding piece 11 and the clutch sliding groove 55, so that the adjusting eccentric wheel 5 rotates together with the main shaft 2, and the adjusting eccentric wheel 5 and the main shaft 2 are relatively static. When the height of the raised tooth is adjusted, the clutch driving mechanism acts on the sliding piece 11 and pushes against the wheel disc part 54, the sliding piece 11 moves in the clutch sliding groove 55 along the direction that the pawl part 111 is separated from the ratchet wheel 10 until the pawl part 111 is separated from the ratchet wheel 10, then the clutch driving mechanism pushes against the wheel disc part 54 to make the adjusting eccentric wheel 5 still, the hand wheel at the right end of the main shaft 2 is rotated to drive the main shaft 2 and the fixed wheel 6 to rotate together, the main shaft 2 and the adjusting eccentric wheel 5 rotate relatively, so that the sliding sleeve 8 and the fixed wheel 6 slide relatively in the second direction and the sliding sleeve 8 and the adjusting sleeve 7 slide relatively in the first direction, the eccentric distance of the raised tooth is changed, and the height of the raised tooth is adjusted.
Preferably, as shown in fig. 5 and 8, an abutting notch 56 is opened on the outer periphery of the wheel disc part 54, a pushing part 112 is provided on the outer peripheral surface of the slide plate 11 at the abutting notch 56, and the pushing part 112 and the pawl part 111 are oppositely arranged in the extending direction of the clutch chute 55; when the pawl portion 111 is engaged with the ratchet 10, the pushing portion 112 is higher than the bottom of the abutment recess 56 and lower than the outer peripheral surface of the disk portion 54; namely: along the radial direction of the wheel disc part 54, the bottom of the abutting notch 56 in the wheel disc part 54, the pushing part 112 on the outer periphery of the sliding piece 11 and the outer peripheral surface of the wheel disc part 54 are sequentially arranged from inside to outside, so that after an adjusting driving shaft 14 which is described below in the clutch driving mechanism extends into the abutting notch 56, the adjusting eccentric wheel 5 can be abutted and the sliding piece 11 can be pushed. In addition, a left end surface of the wheel disc part 54, which is back to the connecting shaft section 52, is fixed with a shaft position screw which extends left and right, the shaft position screw is provided with a reset torsion spring 12, one end of the reset torsion spring 12 is abutted against the pawl part 111, and the reset torsion spring 12 applies acting force towards the ratchet 10 to the pawl part 111; when the clutch driving mechanism does not act on the slider 11, the slider 11 can be moved in the clutch chute 55 in a direction in which the pawl portion 111 approaches the ratchet 10 by the urging force of the return torsion spring 12, so that the pawl portion 111 engages with the ratchet 10. A first limit boss 101 protruding in the radial direction is fixed on the ratchet wheel 10, and the first limit boss 101 can be formed by a pin and a screw; two second limiting bosses 57 which are distributed circumferentially are fixed on the left end surface of the wheel disc part 54, which faces away from the connecting shaft section 52, and the second limiting bosses 57 can also be formed by pins and screws; the first limiting boss 101 is located between the two second limiting bosses 57 and can be abutted against the second limiting bosses 57, and the rotation angle of the eccentric wheel 5 can be limited in the process of adjusting the height of the lifting tooth through the matching of the first limiting boss 101 and the second limiting bosses 57, namely the rotation angle of the main shaft 2 in the process of adjusting the height of the lifting tooth is limited, so that the adjustment range of the height of the lifting tooth is limited.
Further, as shown in fig. 2 and 3, the clutch drive mechanism is integrally provided on the rear side of the adjusting eccentric 5. The clutch driving mechanism preferably has the structure that: as shown in fig. 12 and 13, the clutch driving mechanism includes a fixed base 13 fixed to the overedger housing 1, and an adjusting drive shaft 14 inserted into the fixed base 13 to be movable forward and backward, the adjusting drive shaft 14 extends axially in the forward and backward direction, and the adjusting drive shaft 14 is aligned with the wheel disc portion 54 and can move forward and backward in a direction approaching or separating from the wheel disc portion 54. The fixing seat 13 is a lower tool apron in the overedger, so that the overall structure of the overedger can be optimized. The driving mode for moving the adjustment driving shaft 14 may be automatic driving or manual driving, and in this embodiment, the adjustment driving shaft 14 is manually driven to move forward in a direction approaching the wheel disc portion 54. Based on this, the clutch driving mechanism further includes a baffle 15 fixed at the rear end of the fixed seat 13 by a screw, and the adjusting driving shaft 14 includes a shaft body 141, a shaft pressing portion 142 provided at the rear end of the shaft body 141 away from the wheel disc portion 54, and a shaft limiting flange 143 provided at the joint of the shaft pressing portion 142 and the shaft body 141, so that the shaft limiting flange 143 is also located at the front end of the shaft pressing portion 142; the diameter of the shaft stopper flange 143, the diameter of the shaft pressing portion 142, and the diameter of the shaft body portion 141 are gradually reduced; the fixing seat 13 is provided with a first connecting hole 131 matched with the shaft body part 141 and a second connecting hole 132 matched with the shaft pressing part 142, the baffle 15 is provided with a third connecting hole 151 matched with the shaft pressing part 142, the shaft limiting flange 143 is accommodated in the second connecting hole 132, the outer diameter of the shaft limiting flange 143 is larger than the diameters of the first connecting hole 131 and the third connecting hole 151 and smaller than the diameter of the second connecting hole 132, the diameter of the first connecting hole 131 is equal to the diameter of the third connecting hole 151, so that the fixing seat 13 forms a limiting step part 133 at the joint of the first connecting hole 131 and the second connecting hole 132, and the limiting step part 133 limits the forward movement of the adjusting driving shaft 14. The rear section of the shaft pressing portion 142 is located outside the fixing seat 13 and exposed to facilitate the forward pressing of the driving shaft 14. The clutch driving mechanism further comprises a return spring 16 sleeved on the shaft body portion 141, a first retainer ring 17 fixed on the shaft body portion 141, and a second retainer ring fixed in the first connecting hole 131, the second retainer ring is located on the front side of the first retainer ring 17, two ends of the return spring 16 are abutted to the first retainer ring 17 and the second retainer ring, the return spring 16 is used for driving the adjusting driving shaft 14 to move backwards in the direction away from the wheel disc portion 54, the adjusting driving shaft 14 is enabled to reset, and the retainer plate 15 is limited in the backward movement resetting of the adjusting driving shaft 14. Further, an O-ring and an oil seal are also fitted to the front end of the shaft body 141.
In summary, the working principle of the eccentric adjustable structure of the lifting tooth with the structure is as follows:
when the feed dog height does not need to be adjusted, the user does not press the shaft pressing part 142 of the adjusting driving shaft 14 forward, and the front end of the adjusting driving shaft 14 is far away from the adjusting eccentric wheel 5 and is not in contact with the adjusting eccentric wheel 5 and the sliding piece 11. The pawl portion 111 of the slide 11 engages with the ratchet 10. When the overedger sews, the main motor drives the main shaft 2 to rotate, the ratchet wheel 10 synchronously rotates along with the main feed lifting tooth shaft section 21, the sliding piece 11 and the adjusting eccentric wheel 5 are driven to rotate along with the main shaft 2, the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 rotates around the rotating center of the main shaft 2, the adjusting sleeve 7 and the sliding sleeve 8 are driven to synchronously rotate along with the adjusting eccentric shaft section 51, the feed rack 3 and the feed lifting tooth are driven to reciprocate up and down, and the feed lifting tooth performs feed lifting action.
When the height of the feed dog is required to be adjusted, the main motor of the overedger stops running. First, when the user presses the shaft pressing portion 142 of the adjustment drive shaft 14 forward, the adjustment drive shaft 14 moves forward, the user presses the adjustment drive shaft 14, the front end of the adjustment drive shaft 14 first abuts against the outer peripheral surface of the dial portion 54 of the adjustment eccentric 5, and the return spring 16 is compressed. Secondly, the user drives the main shaft 2 to rotate by rotating the hand wheel, the main shaft 2, the ratchet wheel 10, the sliding piece 11 and the adjusting eccentric wheel 5 rotate together, at a certain position, the front end of the adjusting driving shaft 14 is inserted into the abutting notch 56 of the wheel disc part 54 in the adjusting eccentric wheel 5, at the moment, the adjusting driving shaft 14 is continuously pressed forwards, the adjusting driving shaft 14 further extends into the abutting notch 56, in the process, the adjusting driving shaft 14 pushes the sliding piece 11, the pawl part 111 on the sliding piece 11 is separated from the ratchet wheel 10, and the return spring 16 is further compressed. Then, the main shaft 2 is rotated continuously, the adjusting driving shaft 14 abuts against the abutting notch 56 of the adjusting eccentric wheel 5, so the adjusting eccentric wheel 5 is still static, but the fixed wheel 6 still moves along with the main feed lifting shaft section 21 of the main shaft 2, the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 is in rotational fit with the main feed lifting shaft section 21, the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 is in rotational fit with the adjusting sleeve 7, when the adjusting eccentric wheel 5 is fixed, the main feed lifting shaft section 21, the fixed wheel 6, the adjusting sleeve 7 and the sliding sleeve 8 form a double-sliding-sleeve mechanism, at the moment, the sliding sleeve 8 and the fixed wheel 6 slide relatively in the second direction, and the sliding sleeve 8 and the adjusting sleeve 7 slide relatively in the first direction, so that the relative angle between the center of the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 and the sliding symmetry center line L of the sliding sleeve 8 changes, thereby changing the eccentric distance of the lifting tooth between the matching center of the sliding sleeve 8 and the lifting tooth sliding block 4 and the rotating center of the main shaft 2, and finally realizing the adjustment of the height of the lifting tooth. After the feed dog lifting height adjustment is finished, the user releases the adjusting driving shaft 14, the adjusting driving shaft 14 moves backwards and resets under the action of the return spring 16, the pawl part 111 on the sliding piece 11 is reengaged with the ratchet wheel 10 under the action of the return torsion spring 12, and therefore the adjusting eccentric shaft section 51 of the adjusting eccentric wheel 5 and the main lifting tooth shaft section 21 of the main shaft 2 are repositioned.
Therefore, the overedger related to the application realizes the adjustment of the height of the lifting tooth, can simply, conveniently and quickly adjust the eccentric parameter of the lifting tooth mechanism, does not change the radial angle of the eccentric of the lifting tooth relative to the main shaft 2 after adjustment, does not need to replace the main shaft 2 and disassemble the overedger in the adjustment process, enables the overedger to well sew materials with different types, different thicknesses and different sewing processes, and greatly improves the applicability of the overedger. The fixed wheel 6 adopts a feeding eccentric wheel in the overedger, so that after the height of the feed lifting teeth is adjusted, the relative angle between the feed lifting teeth eccentricity and the feed lifting teeth eccentricity is unchanged, and the feed feeding and the feed lifting teeth are relatively unchanged at any moment.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (14)
1. The utility model provides an eccentric adjustable structure of feed lifting teeth of overedger, includes main shaft (2) that have main feed lifting teeth shaft section (21), tooth rack (3) that have the feed lifting teeth spout and feed lifting teeth slider (4) with feed lifting teeth spout sliding fit, its characterized in that: the device also comprises an adjusting eccentric wheel (5), a fixed wheel (6) fixed on the main feed lifting shaft section (21), an adjusting sleeve (7) and a sliding sleeve (8); the adjusting eccentric wheel (5) is provided with an adjusting eccentric shaft section (51) which is eccentric to the main feed dog shaft section (21), and the adjusting eccentric shaft section (51) is rotatably arranged on the periphery of the main feed dog shaft section (21); the adjusting sleeve (7) is rotatably arranged on the periphery of the adjusting eccentric shaft section (51); the sliding sleeve (8) is sleeved on the periphery of the adjusting sleeve (7) and is in sliding fit with the adjusting sleeve in a first direction, the sliding sleeve (8) is also in sliding fit with the fixed wheel (6) in a second direction, and the first direction is intersected with the second direction; the tooth lifting sliding block (4) is rotatably arranged on the periphery of the sliding sleeve (8);
during sewing, a main feed lifting tooth shaft section (21) of the main shaft (2) and the adjusting eccentric wheel (5) are relatively static;
when the height of the lifting tooth is adjusted, the adjusting eccentric wheel (5) is still, the main shaft (2) rotates, the sliding sleeve (8) and the fixed wheel (6) slide relatively in the second direction, the sliding sleeve (8) and the adjusting sleeve (7) slide relatively in the first direction, and the eccentric distance of the lifting tooth between the matching center of the sliding sleeve (8) and the sliding block (4) of the lifting tooth and the rotating center of the main shaft (2) is changed.
2. The eccentric adjustable structure of the lifting tooth according to claim 1, characterized in that: the fixed wheel (6) is a feeding eccentric wheel in a feeding mechanism of the overedger.
3. The eccentric adjustable structure of the lifting tooth according to claim 1, characterized in that: the outer peripheral surface of the adjusting sleeve (7) is provided with an outer sliding surface (71) extending along the first direction, the inner peripheral surface of the sliding sleeve (8) is provided with an inner sliding surface (81) extending along the first direction, and the outer sliding surface (71) is in contact with the inner sliding surface (81) and is in sliding fit with the inner sliding surface.
4. The eccentric lifter adjustable structure of claim 3, wherein: the inner sliding surfaces (81) of the sliding sleeve (8) are arranged in the circumferential direction along the inner circumferential surface of the sliding sleeve (8), and the matching center of the sliding sleeve (8) and the tooth lifting sliding block (4) and the symmetrical center line of the two inner sliding surfaces (81) of the sliding sleeve (8) are eccentrically arranged.
5. The eccentric adjustable structure of the lifting tooth according to claim 1, characterized in that: the second direction is radial to the sliding sleeve (8); the tip of tight pulley (6) is equipped with slider portion (61), the tip of sliding sleeve (8) is equipped with radial spout (82) that extend along the second direction, slider portion (61) are arranged in radial spout (82), both sliding fit, be surface contact between the cell wall of slider portion (61) and radial spout (82).
6. The eccentric adjustable structure of the lifting tooth according to claim 1, characterized in that: the adjusting eccentric wheel (5) is provided with a connecting shaft section (52) which is concentric with the main tooth lifting shaft section (21), the connecting shaft section (52) is connected with the adjusting eccentric shaft section (51), the fixing wheel (6) is sleeved on the periphery of the connecting shaft section (52) and is fixed on the main tooth lifting shaft section (21) through a fixing screw (9), a through groove (53) which is radially through and circumferentially extends is formed in the connecting shaft section (52), and the fixing screw (9) penetrates through the through groove (53).
7. The eccentric lifter adjustable structure of claim 6, wherein: the adjusting eccentric wheel (5) is provided with a wheel disc part (54) at one end of the connecting shaft section (52) far away from the adjusting eccentric shaft section (51), the end face of the wheel disc part (54) back to the connecting shaft section (52) is provided with a clutch sliding groove (55), and the sliding sheet (11) is positioned in the clutch sliding groove (55) and is in sliding fit with the clutch sliding groove (55); when sewing, the clutch driving mechanism does not act on the sliding piece (11), and the pawl part (111) is meshed with the ratchet wheel (10); when the tooth lifting height is adjusted, the clutch driving mechanism acts on the sliding piece (11) and pushes against the wheel disc part (54), and the sliding piece (11) moves in the clutch sliding groove (55) along the direction that the pawl part (111) is separated from the ratchet wheel (10) until the pawl part (111) is separated from the ratchet wheel (10).
8. The eccentric lifter adjustable structure of claim 7, wherein: an abutting notch (56) is formed in the periphery of the wheel disc part (54), a pushing part (112) is arranged on the outer peripheral surface of the sliding sheet (11) at the abutting notch (56), and the pushing part (112) and the pawl part (111) are oppositely arranged in the extending direction of the clutch sliding groove (55); when the pawl portion (111) is engaged with the ratchet (10), the pushing portion (112) is higher than the bottom of the abutment recess (56) and lower than the outer peripheral surface of the wheel disc portion (54).
9. The eccentric lifter adjustable structure of claim 7, wherein: and a reset torsion spring (12) is fixedly mounted on the end face of the wheel disc part (54) back to the connecting shaft section (52), and one end of the reset torsion spring (12) is abutted against the pawl part (111).
10. The eccentric lifter adjustable structure of claim 7, wherein: the ratchet wheel (10) is fixed with a first limiting boss (101), the end face of the wheel disc part (54) back to the connecting shaft section (52) is fixed with two second limiting bosses (57) distributed circumferentially, and the first limiting boss (101) is located between the two second limiting bosses (57) and can be abutted against the second limiting bosses (57).
11. The eccentric lifter adjustable structure of claim 7, wherein: the clutch driving mechanism comprises a fixed seat (13) fixed with the overedger shell (1) and an adjusting driving shaft (14) movably arranged in the fixed seat (13) in a penetrating mode, and the adjusting driving shaft (14) is aligned to the wheel disc portion (54) and can move towards the direction close to or far away from the wheel disc portion (54).
12. The eccentric lifter adjustable structure of claim 11, wherein: the clutch driving mechanism also comprises a baffle plate (15) fixed on the fixed seat (13), the adjusting driving shaft (14) comprises a shaft body part (141), a shaft pressing part (142) arranged at one end of the shaft body part (141) far away from the wheel disc part (54), and a shaft limiting flange (143) arranged at the joint of the shaft pressing part (142) and the shaft body part (141), the fixed seat (13) is provided with a first connecting hole (131) matched with the shaft body part (141) and a second connecting hole (132) matched with the shaft pressing part (142), a third connecting hole (151) matched with the shaft pressing part (142) is arranged in the baffle plate (15), the shaft stopper flange (143) is received in the second connection hole (132), and the outer diameter of the shaft stopper flange (143) is larger than the diameters of the first connection hole (131) and the third connection hole (151) and smaller than the diameter of the second connection hole (132).
13. The eccentric lifter adjustable structure of claim 12, wherein: the clutch driving mechanism further comprises a return spring (16) sleeved on the shaft body portion (141), a first retaining ring (17) fixed on the shaft body portion (141), and a second retaining ring fixed in the first connecting hole (131), and two ends of the return spring (16) are abutted to the first retaining ring (17) and the second retaining ring.
14. An overlock machine, characterized in that: the overedger is provided with the eccentric tooth lifting adjustable structure as claimed in any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911282588.3A CN112981739B (en) | 2019-12-13 | 2019-12-13 | Overedger and eccentric adjustable structure of lifting tooth thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911282588.3A CN112981739B (en) | 2019-12-13 | 2019-12-13 | Overedger and eccentric adjustable structure of lifting tooth thereof |
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| CN112981739A true CN112981739A (en) | 2021-06-18 |
| CN112981739B CN112981739B (en) | 2022-06-21 |
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| CN208266401U (en) * | 2018-05-11 | 2018-12-21 | 浙江美机缝纫机有限公司 | The Tai Ya mechanism of sewing machine |
| CN109371577A (en) * | 2018-11-19 | 2019-02-22 | 杰克缝纫机股份有限公司 | Feed dog frame regulating mechanism and the overedger for using the mechanism |
| CN109371576A (en) * | 2018-11-19 | 2019-02-22 | 杰克缝纫机股份有限公司 | Feed dog frame regulating mechanism and the overedger for using the mechanism |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB671025A (en) * | 1950-10-10 | 1952-04-30 | Singer Mfg Co | Feeding mechanism for sewing machines |
| CN105088548A (en) * | 2015-09-30 | 2015-11-25 | 杰克缝纫机股份有限公司 | Sewing machine feeding mechanism |
| CN107558014A (en) * | 2017-09-19 | 2018-01-09 | 杰克缝纫机股份有限公司 | A kind of cloth feeding mechanism and sewing machine |
| CN208183241U (en) * | 2018-04-27 | 2018-12-04 | 杰克缝纫机股份有限公司 | A kind of sewing machine feed dog height simple adjusting device and sewing machine |
| CN208266401U (en) * | 2018-05-11 | 2018-12-21 | 浙江美机缝纫机有限公司 | The Tai Ya mechanism of sewing machine |
| CN109371577A (en) * | 2018-11-19 | 2019-02-22 | 杰克缝纫机股份有限公司 | Feed dog frame regulating mechanism and the overedger for using the mechanism |
| CN109371576A (en) * | 2018-11-19 | 2019-02-22 | 杰克缝纫机股份有限公司 | Feed dog frame regulating mechanism and the overedger for using the mechanism |
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| CN112981739B (en) | 2022-06-21 |
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