CN112981738A - Lifting tooth height adjusting mechanism and overedger - Google Patents
Lifting tooth height adjusting mechanism and overedger Download PDFInfo
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- CN112981738A CN112981738A CN201911282554.4A CN201911282554A CN112981738A CN 112981738 A CN112981738 A CN 112981738A CN 201911282554 A CN201911282554 A CN 201911282554A CN 112981738 A CN112981738 A CN 112981738A
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- tooth
- plate
- sliding groove
- lifting
- groove
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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 tooth lifting height adjusting mechanism which comprises a main shaft, a tooth lifting sliding block, a tooth rack, a feeding tooth, an aligning sleeve and a rotation driving unit, wherein the rotation driving unit acts on the aligning sleeve; when the overedger sews normally, the aligning sleeve and the lifting tooth slide block are relatively static; when the overedging machine adjusts the tooth lifting height of the feeding tooth, the rotation driving unit drives the aligning sleeve to rotate for an angle around the center of the eccentric section of the tooth lifting, so that the distance between the upper end of the eccentric section of the aligning sleeve and the rotating center of the main shaft is changed, the position of the highest point when the tooth lifting sliding block reciprocates up and down when the follow-up overedging machine operates is changed, the tooth lifting height of the feeding tooth is changed, and the whole adjusting process is convenient and quick to operate.
Description
Technical Field
The invention relates to a lifting tooth height adjusting mechanism.
The invention also relates to an overedger comprising the lifting tooth height adjusting mechanism.
Background
In the prior overlock sewing machine, the feed dog is matched with the presser foot to realize forward feed of sewing materials. For different sewing materials, the height of the feed tooth exposed out of the tooth lifting height of the upper surface of the needle plate needs to be adjusted, so that the feeding capacity of the sewing materials is changed, and smooth feeding can be achieved for the sewing materials with different thicknesses. At present, the main mode of adjusting the tooth lifting height of a feeding tooth is as follows: the locking position of the screw for fixing the feeding tooth is manually adjusted on the feeding tooth, and a gauge is required to be combined, related parts influencing operation in the overedger need to be detached during adjustment, the operation is complex, time-consuming and inconvenient, and the adjustment difficulty is very high.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a feed lifting tooth height adjusting mechanism capable of conveniently and quickly adjusting the feed lifting tooth height of a feed feeding tooth.
In order to achieve the purpose, the invention provides a tooth lifting height adjusting mechanism which comprises a main shaft, a tooth lifting sliding block, a tooth rack with a tooth lifting sliding groove, feeding teeth, an aligning sleeve and a rotation driving unit, wherein the tooth lifting sliding block is arranged in the tooth lifting sliding groove and is in sliding fit with the tooth lifting sliding groove; when the overedger sews normally, the aligning sleeve and the lifting tooth sliding block are relatively static; when the overedger adjusts the tooth lifting height of the feeding tooth, the rotation driving unit drives the aligning sleeve to rotate for an angle around the center of the tooth lifting eccentric section.
Furthermore, the rotation driving unit comprises a rotatable adjusting wrench, a follow-up plate capable of moving along the feeding direction of the feeding teeth, a movement driving component connected between the adjusting wrench and the follow-up plate, an angle adjusting fork, a supporting slide block and a corner sleeve, the follow-up plate is provided with a connecting driving part, the angle adjusting fork is rotatably arranged on the connecting driving part, the angle adjusting fork is internally provided with a first sliding groove, the corner sleeve is provided with a first connecting part in sliding fit with the first sliding groove, a second sliding groove which is arranged in the first connecting part and is parallel to the first sliding groove, and a third sliding groove which is arranged on the end surface back to the first connecting part and is intersected with the first sliding groove, the supporting slide block is sleeved on the periphery of the main shaft and is in running fit with the main shaft, the supporting slide block is also in sliding fit with the second sliding chute, one end of the aligning sleeve, which faces away from the aligning eccentric section, is provided with a second connecting part in sliding fit with the third sliding groove.
Furthermore, the groove wall of the first sliding groove is in surface contact with the first connecting part, the groove wall of the second sliding groove is in surface contact with the supporting sliding block, and the groove wall of the third sliding groove is in surface contact with the second connecting part.
Furthermore, the rotation driving unit further comprises a cover plate fixed on the sewing machine shell, and the cover plate covers the upper portions of the follow-up plate, the angle adjusting fork, the supporting sliding block, the corner sleeve and the aligning sleeve.
Furthermore, the rotation driving unit further comprises an indicating plate fixed on the upper end face of the cover plate and a locking screw fixed on the adjusting wrench, an adjusting groove is formed in the indicating plate, and the locking screw penetrates through the adjusting groove.
Furthermore, the adjusting wrench is provided with a fixed rotating fulcrum, and the adjusting groove is an arc groove taking the fixed rotating fulcrum of the adjusting wrench as a circle center.
Further, the locking screw is a thumb screw.
Further, the movable driving assembly comprises a camshaft extending vertically and a guide block fixed on the lower end face of the cover plate, the camshaft is provided with an upper shaft portion and a lower shaft portion eccentric to the upper shaft portion, the upper shaft portion is rotatably arranged in the cover plate in a penetrating mode and fixed with the adjusting wrench, the follow-up plate is further provided with a plate main body portion, a fourth sliding groove formed in the plate main body portion and a plate sliding block portion extending from the periphery of the plate main body portion in the feeding direction of the feeding teeth, the lower shaft portion is located in the fourth sliding groove and in sliding fit with the fourth sliding groove, a movable cavity and a guide sliding groove extending in the feeding direction of the feeding teeth and communicated with the movable cavity are formed in the guide block, the plate main body portion of the follow-up plate is located in the movable cavity of the guide block, and the plate sliding block portion of the follow-up plate is located in the guide sliding.
Furthermore, the plate sliding block part is in surface contact with the groove wall of the guide sliding groove.
The application also provides an overedger, install as above in the overedger lifting teeth height adjustment mechanism.
As described above, the feed lifting height adjusting mechanism and the overedger according to the present invention have the following advantages:
this application rotates an angle through rotating the center that drive unit drive aligning cover was put up the eccentric section of tooth and rotate an angle, changes the distance between aligning eccentric section upper end and the main shaft rotation center from this to the position of the peak when changing the operation of follow-up hemming machine when putting up tooth slider reciprocating motion from top to bottom, and then changes the tooth of lifting up of pay-off tooth height, whole accommodation process convenient operation is quick, and need not dismantle the part of hemming machine.
Drawings
FIG. 1 is a schematic structural view of an overlock machine according to the present application.
Fig. 2 is a schematic structural diagram of a feed lifting height adjusting mechanism in the present application.
Fig. 3 is an exploded view of fig. 2.
Fig. 4 and 5 are schematic views of connection among the tooth lifting slider, the aligning sleeve and the rotation driving unit at different viewing angles in the present application, and a cover plate is omitted in both fig. 4 and 5.
Fig. 6 is a sectional view of fig. 2 at the tooth lifting slide.
Fig. 7 is a schematic structural diagram of the aligning sleeve in the present application.
Fig. 8 is a schematic view of the structure of the follower plate in the present application.
Fig. 9 is a schematic structural diagram of the corner sleeve of the present application.
Fig. 10 is an adjustment schematic diagram of the feed lifting height adjustment mechanism of the present application.
Fig. 11 is a schematic view of the connection between the adjustment wrench and the camshaft in the present application.
Description of the element reference numerals
1 spindle
101 eccentric section of tooth lifting
2 dental articulator
21 lifting tooth chute
3 feeding tooth
4 aligning sleeve
41 center-adjusting eccentric section
42 second connection part
43 third mating plane
5 adjusting spanner
6 follow-up plate
61 connected to the drive unit
62 plate body part
63 fourth chute
64 plate slide block part
65 fourth mating plane
66 flange part
7 angle modulation fork
71 first chute
8 support slide block
81 second mating plane
9 corner sleeve
91 first connection part
92 second chute
93 third chute
94 first mating plane
10 cover plate
11 indicator board
111 regulating groove
12 locking screw
13 camshaft
131 upper shaft part
132 lower shaft part
133 connecting the planes
134 connecting arc surface
14 guide block
141 movable chamber
142 guide chute
15 casing
16 lock nut
17 lifting tooth slide block
18 limit clamp spring
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, including an overlock machine housing 15, and a main shaft 1 rotatably mounted in the overlock machine housing 15. For convenience of description, the following embodiments define the directions as follows: as shown in fig. 3, the axial direction of the main shaft 1 is defined as the left-right direction, the direction of the main shaft 1 towards the head of the overedger is the left direction, and the direction of the main shaft 1 towards the tail of the overedger is the right direction; defining the feeding direction of the feeding tooth 3 for transferring sewing materials during sewing of the overedger as the front direction; a direction orthogonal to both the left-right direction and the front-rear direction is defined as an up-down direction.
Further, this application still provides a tooth lifting height adjustment mechanism who installs in overedger. As shown in fig. 2 and 3, the feed lifting tooth height adjusting mechanism comprises a left-right extension main shaft 1, a feed lifting tooth slide block 17, a tooth rack 2 with a feed lifting tooth slide groove 21 at the rear end, a feed feeding tooth 3 installed at the rear end of the tooth rack 2, a centering sleeve 4 and a rotation driving unit; the lifting tooth slide block 17 is positioned in the lifting tooth slide groove 21 and is in sliding fit with the lifting tooth slide groove 21, the lifting tooth slide groove 21 extends forwards and backwards, and the lifting tooth slide block 17 is in surface contact with the groove walls on the upper side and the lower side of the lifting tooth slide groove 21; the rotation driving unit acts on the aligning sleeve 4; as shown in fig. 3, 6 and 10, the spindle 1 is provided with a tooth lifting eccentric section 101 eccentric to a rotation center O1 of the spindle 1, the centering sleeve 4 is sleeved on the periphery of the tooth lifting eccentric section 101 and is in running fit with the tooth lifting eccentric section 101, the right end of the centering sleeve 4 is provided with a centering eccentric section 41 extending axially rightward and eccentric to the tooth lifting eccentric section 101, and the tooth lifting slide block 17 is sleeved on the periphery of the centering eccentric section 41 and is in running fit with the tooth lifting slide block and the centering eccentric section 41. Therefore, the aligning sleeve 4 has an inner hole concentrically arranged with the raised tooth eccentric section 101, the inner hole of the aligning sleeve 4 penetrates the entire aligning sleeve 4 in the left-right direction, and the center of the outer peripheral surface of the aligning eccentric section 41 in the aligning sleeve 4 is not concentric with the inner hole of the aligning sleeve 4, and both are eccentrically arranged.
When the overedger normally sews, the rotation driving unit does not act, under the action of the rotation driving unit, the aligning sleeve 4 is kept at a certain position angle, the aligning sleeve 4 and the tooth lifting slide block 17 are relatively static, the main shaft 1 rotates, the tooth lifting eccentric section 101 on the main shaft 1 drives the aligning sleeve 4 and the tooth lifting slide block 17 to move together in a vertical plane perpendicular to the main shaft 1, namely a circumferential plane of the aligning sleeve 4, namely the aligning sleeve 4 and the tooth lifting slide block 17 reciprocate back and forth and up and down together, and the back and forth reciprocating motion of the aligning sleeve 4 and the tooth lifting slide block 17 is released through the tooth lifting sliding groove 21, so that the tooth frame 2 and the feeding teeth 3 are driven to reciprocate up and down to perform tooth lifting motion. When the overedger adjusts the tooth lifting height of the feed tooth 3, the rotation driving unit is operated, the rotation driving unit drives the aligning sleeve 4 to rotate by an angle theta around the center O2 of the tooth lifting eccentric section 101, as shown in FIG. 10, the outer peripheral surface of the aligning eccentric section 41 on the aligning sleeve 4 is changed from the position S1 to the position S2, namely the position of the matching center O2 of the aligning eccentric section 41 and the tooth lifting slide block 17 in the aligning sleeve 4 relative to the rotating center O1 of the main shaft 1 is changed, so that the distance between the upper end of the aligning eccentric section 41 and the rotating center O1 of the main shaft 1 is changed, the distance h1 between the upper end of the aligning eccentric section 41 at the position S1 and the rotating center O1 of the main shaft 1 is changed to the distance h2 between the upper end of the aligning eccentric section 41 and the rotating center O1 of the main shaft 1 at the position S2, so that the highest point of the main shaft 1 drives the aligning sleeve 4 and the tooth lifting slide block 17 to move up and down in a, therefore, the feed lifting height of the feed dog 3 is realized, the feed capacity of a feed executing mechanism in the overedger is changed, the whole adjusting process of feed lifting height adjustment is convenient and quick to operate, and parts of the overedger do not need to be disassembled.
Further, the preferable structure of the rotation driving unit is: as shown in fig. 2 to 5 and 7 to 9, the rotary driving unit includes a rotatable adjusting wrench 5, a follower plate 6 capable of moving back and forth along the feeding direction of the feeding teeth 3, a moving driving assembly connected between the adjusting wrench 5 and the follower plate 6, an angle adjusting fork 7, a supporting slider 8, and an angle adjusting sleeve 9; the right end of the follower plate 6 has a connection driving part 61, and preferably, the connection driving part 61 is a shaft section parallel to the main shaft 1; the upper end of the angle adjusting fork 7 is rotatably arranged on the connecting driving part 61, and a first sliding groove 71 is formed in the angle adjusting fork 7; the corner sleeve 9 has a first connecting portion 91 in sliding fit with the first sliding groove 71, a second sliding groove 92 formed in the first connecting portion 91 and parallel to the first sliding groove 71, and a third sliding groove 93 formed on a right end surface facing away from the first connecting portion 91, the third sliding groove 93 intersects with the first sliding groove 71, and a certain included angle is formed between the first sliding groove and the third sliding groove, preferably, the third sliding groove 93 is perpendicular to the first sliding groove 71, and the angle adjusting fork 7 and the corner sleeve 9 can slide relatively in the extending direction of the first sliding groove 71; the supporting slide block 8 is sleeved on the periphery of the main shaft 1 and is in running fit with the main shaft 1, so that a connecting hole which is concentric with the rotation center O1 of the main shaft 1 is formed in the supporting slide block 8; the supporting slide block 8 is also in sliding fit with the second sliding groove 92, the supporting slide block 8 and the angle adjusting fork 7 can relatively slide in the extending direction of the second sliding groove 92, the corner sleeve 9 is not directly connected with the main shaft 1, and the two are connected through the supporting slide block 8; the left end of the aligning sleeve 4, which faces away from the aligning eccentric section 41, is provided with a second connecting part 42 in sliding fit with the third sliding groove 93, and the corner sleeve 9 and the aligning sleeve 4 can relatively slide in the extending direction of the third sliding groove 93. In other embodiments, the connection driving part 61 may be a ball part having a spherical surface connected to the reclining fork 7 on the outer circumference.
Preferably, the rotation driving unit further comprises a cover plate 10 fixed on the sewing machine shell 15 through screws, the cover plate 10 covers the upper portion of the follow-up plate 6, the angle adjusting fork 7, the supporting sliding block 8, the corner sleeve 9 and the aligning sleeve 4, the appearance attractiveness of the overedger is improved, dust and the like are prevented from entering the rotation driving unit, the power transmission accuracy of the rotation driving unit is guaranteed, and therefore the accuracy of tooth lifting height adjustment is guaranteed.
Further, the preferred structure of the moving drive assembly in the rotary drive unit is: as shown in fig. 2 to 5 and 7 to 9, the moving drive assembly includes a cam shaft 13 extending up and down, and a guide block 14 fixed to a lower end surface of the cover plate 10 by screws; the camshaft 13 has an upper shaft part 131 and a lower shaft part 132 eccentric to the upper shaft part 131, the lower end of the upper shaft part 131 is connected with the upper end of the lower shaft part 132, the upper shaft part 131 is rotatably inserted into the cover plate 10 and fixed with the right end of the adjusting wrench 5; the follower plate 6 further has a plate main body portion 62 extending horizontally, fourth slide grooves 63 opened in the plate main body portion 62, and plate slider portions 64 extending in the front-rear direction from both front and rear sides of the outer periphery of the plate main body portion 62, preferably, the fourth slide grooves 63 are parallel to the main shaft 1; the lower shaft part 132 is positioned in the fourth sliding groove 63 and is in sliding fit with the fourth sliding groove 63, the outer peripheral surface of the lower shaft part 132 is tangent to the groove wall of the fourth sliding groove 63, and the lower shaft part and the fourth sliding groove are in line contact; the upper surface of the guide block 14 is provided with a movable cavity 141 and guide chutes 142 extending along the front-rear direction and communicated with the movable cavity 141, the front side and the rear side of the movable cavity 141 are respectively provided with a guide chute 142 extending front-rear, and the movable cavity 141 and the two guide chutes 142 form a cross-shaped chamber between the guide block 14 and the cover plate 10; the plate main body portion 62 of the follower plate 6 is located in the movable cavity 141 of the guide block 14, and the width of the movable cavity 141 in the front-rear direction is larger than the width of the plate main body portion 62 of the follower plate 6 in the front-rear direction to allow the follower plate 6 to be movable in the front-rear direction; the plate slider portion 64 of the follower plate 6 is positioned in the guide slide groove 142 of the guide block 14, and the two are slidably engaged, so that the follower plate 6 can move only in the front-rear direction but cannot move in the left-right direction.
Preferably, as shown in fig. 2 to 5 and 7 to 9, in the above-described rotation driving unit, the groove wall of the first slide groove 71 and the first connecting portion 91, the groove wall of the second slide groove 92 and the support slider 8, the groove wall of the third slide groove 93 and the second connecting portion 42, and the plate slider portion 64 and the groove wall of the guide slide groove 142 are in surface contact with each other. Therefore, the outer periphery of the first connection portion 91 of the corner sleeve 9 is provided with a pair of first engagement planes 94 extending in the extending direction of the first slide groove 71, the outer periphery of the support slider 8 is provided with a pair of second engagement planes 81 extending in the extending direction of the second slide groove 92, the first engagement planes 94 of the corner sleeve 9 and the groove walls of the second slide groove 92 are a pair of parallel planes, the outer periphery of the second connection portion 42 of the aligning sleeve 4 is provided with a pair of third engagement planes 43 extending in the extending direction of the third slide groove 93, and both left and right side surfaces of the plate slider portion 64 of the follower plate 6 are fourth engagement planes 65 extending in the extending direction of the guide slide grooves 142. Of course, in other embodiments, the line contact or point contact may be made between the groove wall of the first slide groove 71 and the first connecting portion 91, between the groove wall of the second slide groove 92 and the support slider 8, between the groove wall of the third slide groove 93 and the second connecting portion 42, and between the board slider portion 64 and the groove wall of the guide slide groove 142.
Preferably, as shown in fig. 2 to 5 and 7 to 9, the rotation driving unit further includes an indicating plate 11 fixed on the upper end surface of the cover plate 10 by screws, and a locking screw 12 fixed on the left end of the adjusting wrench 5, an adjusting slot 111 is formed in the indicating plate 11, the locking screw 12 is inserted into the adjusting slot 111, and the indicating plate 11 and the locking screw 12 are exposed on the surface of the overedger for convenient operation. The adjustment wrench 5 has a fixed rotation fulcrum, which is the center of the upper shaft portion 131 of the camshaft 13, and the adjustment groove 111 is an arc groove centered on the fixed rotation fulcrum of the adjustment wrench 5. The locking screw 12 is a thumb screw. The fixing structure between the adjustment wrench 5 and the upper shaft portion 131 of the camshaft 13 is: as shown in fig. 5 and 11, the lower end of the upper shaft portion 131 of the camshaft 13 is an installation shaft section, two connection planes 133 and two connection arc surfaces 134 connected between the connection planes 133 are arranged on the outer peripheral surface of the installation shaft section, that is, the cross section of the installation shaft section is non-circular, an installation groove adapted to the shape of the cross section of the installation shaft section is formed at the right end of the adjustment wrench 5, the installation groove at the right end of the adjustment wrench 5 is sleeved on the installation shaft section, a locking nut 16 is further connected on the upper shaft portion 131 in a threaded manner, the lower end of the locking nut 16 is abutted to the adjustment wrench 5, and thus the adjustment wrench 5 is fixed to the upper shaft portion 131 of the camshaft 13, so that the camshaft 13 rotates by the same. The follower plate 6 is provided with a flange portion 66 at the left end of the connection driving portion 61, a limit clip 18 at the right end of the connection driving portion 61, and the flange portion 66 and the limit clip 18 are respectively abutted against the left and right sides of the upper end of the reclining fork 7 to limit the reclining fork 7 in the left-right direction.
As described above, the lifting tooth height adjusting mechanism having the above-described structure and the overedger equipped with the lifting tooth height adjusting mechanism operate in the following manner.
The height of the feed dog 3 does not need to be adjusted: the locking screw 12 is tightened to fix the position of the adjusting wrench 5, so that the camshaft 13 and the follower plate 6 are kept at the respective current positions, that is, the hinge point of the angle adjusting fork 7 and the connecting driving part 61 is kept at the current position; the supporting slide block 8 is hinged on the periphery of the main shaft 1, the supporting slide block 8 is positioned in the second sliding groove 92 of the corner sleeve 9, the first connecting part 91 of the corner sleeve 9 is positioned in the first sliding groove 71 of the angle adjusting fork 7, so that the position of the angle adjusting fork 7 at the supporting slide block 8 is maintained and limited at the connecting driving part 61 and the position of the supporting slide block 8 in the front-back direction, the angle adjusting fork 7 is limited from swinging back and forth around the connecting driving part 61, and therefore the angle adjusting fork 7 is in a static state, and therefore the corner sleeve 9 is limited to slide in the first sliding groove 71 of the angle adjusting fork 7 only along the extending direction of the first sliding groove 71. The overedger operates, the main shaft 1 rotates, the supporting sliding block 8 and the angle adjusting fork 7 are both in a static state, the main shaft 1 drives the aligning sleeve 4 to move in a circumferential plane through the tooth lifting eccentric section 101, but the aligning sleeve 4 does not rotate, the aligning sleeve 4 drives the tooth lifting sliding block 17 to move together, the aligning sleeve 4 is released through the third sliding groove 93 relative to the movement of the corner sleeve 9 in the extending direction of the third sliding groove 93, and the aligning sleeve 4 drives the corner sleeve 9 to slide in the first sliding groove 71 of the angle adjusting fork 7 along the extending direction of the first sliding groove 71; and the shifting of the feed dog slide block 17 relative to the tooth rack 2 in the extending direction of the feed dog slide groove 21 is released through the feed dog slide groove 21, so that the feed dog 3 and the drive tooth rack 2 reciprocate up and down in the direction perpendicular to the feed dog slide groove 21, and the feed dog 3 performs the feed dog action. The feed dog 3 forms a stable feed by exposing a part of the upper surface of the needle plate during the feed lifting process.
The feed dog 3 needs to be adjusted in the height of the feed dog: the overedger stops operating, the main shaft 1 stops rotating, the locking screw 12 is unscrewed, and the locking screw 12 moves in the adjustment groove 111. The locking screw 12 drives the adjusting wrench 5 to rotate, the adjusting wrench 5 drives the upper shaft portion 131 and the lower shaft portion 132 of the cam shaft 13 to rotate together through the same angle, and the lower shaft portion 132 and the upper shaft portion 131 are eccentrically arranged, so that the lower shaft portion 132 rotates around the central axis of the upper shaft portion 131 and simultaneously generates displacement in the front-back direction and the left-right direction, the displacement in the left-right direction is released by the fourth sliding groove 63, the follower plate 6 is driven to move in the front-back direction under the action of the guide sliding groove 142, and the front-back position of the angle adjusting fork 7 at the position of the connection driving portion 61 is changed. When the upper end of the angle adjusting fork 7 moves back and forth, the angle adjusting fork 7 rotates together around the connecting driving part 61, the angle adjusting fork 7 drives the corner sleeve 9, the supporting slider 8 and the aligning sleeve 4 to rotate together by the same angle, as shown in fig. 10, the outer peripheral surface of the aligning eccentric section 41 on the aligning sleeve 4 is changed from a position S1 to a position S2, finally, the distance h1 between the upper end of the aligning eccentric section 41 at the position S1 and the rotation center O1 of the main shaft 1 is changed to the distance h2 between the upper end of the aligning eccentric section 41 at the position S2 and the rotation center O1 of the main shaft 1, and the tooth lifting height of the feeding tooth 3 is realized. After the adjustment is completed, the locking screw 12 is tightened.
Therefore, the adjustment of the height of the feed lifting teeth can be realized, in the adjustment process, only the locking screw 12 needs to be unscrewed and the locking screw 12 moves in the adjusting groove 111 of the indicating plate 11, no demand instrument is needed, other parts in the overedger are detached, the height of the feed lifting teeth of the feed feeding teeth 3 can be quickly, conveniently and effectively adjusted, the overedger can provide different feed lifting teeth heights according to the cloth feeding requirements of different sewing materials, and the applicability of the overedger to different sewing materials is improved.
Therefore, the invention effectively overcomes various defects in 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 (10)
1. The utility model provides a feed dog height adjustment mechanism, includes main shaft (1), feed dog slider (17), has feed dog (3) of feed dog frame (2) of feed dog spout (21) and installing on feed dog frame (2), feed dog slider (17) are arranged in feed dog spout (21), both sliding fit, its characterized in that: the centering device is characterized by further comprising a centering sleeve (4) and a rotation driving unit, wherein the rotation driving unit acts on the centering sleeve (4), a tooth lifting eccentric section (101) eccentric to a rotation center (O1) of the main shaft (1) is arranged on the main shaft (1), the centering sleeve (4) is sleeved on the periphery of the tooth lifting eccentric section (101) and is in running fit with the tooth lifting eccentric section, the centering sleeve (4) is provided with a centering eccentric section (41) eccentric to the tooth lifting eccentric section (101), and a tooth lifting sliding block (17) is sleeved on the periphery of the centering eccentric section (41) and is in running fit with the centering eccentric section; when the overedger sews normally, the aligning sleeve (4) and the lifting tooth sliding block (17) are relatively static; when the overedger adjusts the tooth lifting height of the feeding tooth (3), the rotation driving unit drives the aligning sleeve (4) to rotate for an angle around the center (O2) of the tooth lifting eccentric section (101).
2. The feed lifting mechanism according to claim 1, wherein: the rotary driving unit comprises a rotatable adjusting wrench (5), a follow-up plate (6) capable of moving along the feeding direction of the feeding teeth (3), a moving driving component connected between the adjusting wrench (5) and the follow-up plate (6), an angle adjusting fork (7), a supporting slide block (8) and a corner sleeve (9), the follow-up plate (6) is provided with a connecting driving part (61), the angle adjusting fork (7) is rotatably installed on the connecting driving part (61), a first sliding groove (71) is formed in the angle adjusting fork (7), the corner sleeve (9) is provided with a first connecting part (91) in sliding fit with the first sliding groove (71), a second sliding groove (92) formed in the first connecting part (91) and parallel to the first sliding groove (71), and a third sliding groove (93) formed on the end face back to the first connecting part (91) and intersected with the first sliding groove (71), support slider (8) cover and establish periphery, both normal running fit at main shaft (1), support slider (8) still with second spout (92) sliding fit, the one end of aligning cover (4) centering eccentric section (41) dorsad is equipped with second connecting portion (42) with third spout (93) sliding fit.
3. The feed lifting mechanism according to claim 2, wherein: the groove wall of the first sliding groove (71) is in surface contact with the first connecting part (91), the groove wall of the second sliding groove (92) is in surface contact with the supporting sliding block (8), and the groove wall of the third sliding groove (93) is in surface contact with the second connecting part (42).
4. The feed lifting mechanism according to claim 2, wherein: the rotation driving unit further comprises a cover plate (10) fixed on a sewing machine shell (15), and the cover plate (10) covers the upper portion of the follow-up plate (6), the angle adjusting fork (7), the supporting slide block (8), the corner sleeve (9) and the aligning sleeve (4).
5. The feed lifting mechanism according to claim 4, wherein: the rotation driving unit further comprises an indicating plate (11) fixed on the upper end face of the cover plate (10) and a locking screw (12) fixed on the adjusting wrench (5), an adjusting groove (111) is formed in the indicating plate (11), and the locking screw (12) penetrates through the adjusting groove (111).
6. The feed lifting mechanism according to claim 5, wherein: the adjusting wrench (5) is provided with a fixed rotating fulcrum, and the adjusting groove (111) is an arc groove taking the fixed rotating fulcrum of the adjusting wrench (5) as a circle center.
7. The feed lifting mechanism according to claim 5, wherein: the locking screw (12) is a butterfly screw.
8. The feed lifting mechanism according to claim 4, wherein: the movable driving assembly comprises a cam shaft (13) extending vertically and a guide block (14) fixed on the lower end face of the cover plate (10), the cam shaft (13) is provided with an upper shaft part (131) and a lower shaft part (132) eccentric to the upper shaft part (131), the upper shaft part (131) is rotatably arranged in the cover plate (10) in a penetrating mode and fixed with the adjusting wrench (5), the follow-up plate (6) is further provided with a plate main body part (62), a fourth sliding groove (63) formed in the plate main body part (62) and a plate sliding block part (64) extending from the periphery of the plate main body part (62) along the feeding direction of the feeding teeth (3), the lower shaft part (132) is located in the fourth sliding groove (63) and in sliding fit with the fourth sliding groove, a movable cavity (141) and a guide sliding groove (142) extending along the feeding direction of the feeding teeth (3) and communicated with the movable cavity (141) are formed in the guide block (14), the plate main body part (62) of the follow-up plate (6) is positioned in the movable cavity (141) of the guide block (14), and the plate sliding block part (64) of the follow-up plate (6) is positioned in the guide sliding groove (142) of the guide block (14) and is in sliding fit with the guide sliding groove.
9. The feed lifting mechanism of claim 8, wherein: the plate sliding block part (64) is in surface contact with the groove wall of the guide sliding groove (142).
10. An overlock machine, characterized in that: the overedger is provided with the lifting tooth height adjusting mechanism of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911282554.4A CN112981738B (en) | 2019-12-13 | 2019-12-13 | Lifting tooth height adjusting mechanism and overedger |
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| 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 |
| CN208136468U (en) * | 2018-05-07 | 2018-11-23 | 浙江美机缝纫机有限公司 | The Tai Ya mechanism of sewing machine |
| CN109338603A (en) * | 2018-10-24 | 2019-02-15 | 杰克缝纫机股份有限公司 | Sewing machine backstitches mechanism and sewing machine |
| CN109594208A (en) * | 2019-01-14 | 2019-04-09 | 安徽杰羽制鞋机械科技有限公司 | A kind of needle gage of sewing machine adjusts and falls automatically feeding structure |
| CN109881376A (en) * | 2019-03-18 | 2019-06-14 | 拓卡奔马机电科技有限公司 | Sewing length adjustment device and its operational method |
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| JPH02168984A (en) * | 1988-12-22 | 1990-06-29 | Janome Sewing Mach Co Ltd | Sewing machine preventing idle sewing noise |
| 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 |
| CN208136468U (en) * | 2018-05-07 | 2018-11-23 | 浙江美机缝纫机有限公司 | The Tai Ya mechanism of sewing machine |
| CN109338603A (en) * | 2018-10-24 | 2019-02-15 | 杰克缝纫机股份有限公司 | Sewing machine backstitches mechanism and sewing machine |
| CN109594208A (en) * | 2019-01-14 | 2019-04-09 | 安徽杰羽制鞋机械科技有限公司 | A kind of needle gage of sewing machine adjusts and falls automatically feeding structure |
| CN109881376A (en) * | 2019-03-18 | 2019-06-14 | 拓卡奔马机电科技有限公司 | Sewing length adjustment device and its operational method |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Applicant after: Jack Technology Co.,Ltd. Address before: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Applicant before: JACK SEWING MACHINE Co.,Ltd. |
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