CN112626726A - Feed lifting height adjusting mechanism and sewing machine - Google Patents
Feed lifting height adjusting mechanism and sewing machine Download PDFInfo
- Publication number
- CN112626726A CN112626726A CN201910905843.9A CN201910905843A CN112626726A CN 112626726 A CN112626726 A CN 112626726A CN 201910905843 A CN201910905843 A CN 201910905843A CN 112626726 A CN112626726 A CN 112626726A
- Authority
- CN
- China
- Prior art keywords
- tooth
- adjusting
- lifting
- feed
- feed lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/24—Feed-dog lifting and lowering devices
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a feed lifting tooth height adjusting mechanism which comprises a main shaft, a feed lifting tooth shaft, a tooth rack, a feed feeding tooth, a first feed lifting tooth transmission assembly connected between the main shaft and the feed lifting tooth shaft, a second feed lifting tooth transmission assembly connected between the feed lifting tooth shaft and the tooth rack, an adjusting drive assembly and an adjusting stud. When the adjusting stud moves, the position of the first sliding block in the first sliding groove in the extending direction of the first sliding groove can be changed, the swinging amplitude of the main shaft driving the feed lifting tooth shaft to swing is changed, and the height of the feed lifting tooth is adjusted.
Description
Technical Field
The invention relates to a lifting tooth height adjusting mechanism.
The invention also relates to a sewing machine comprising the feed lifting tooth height adjusting mechanism.
Background
As shown in fig. 1, various sewing machines on the market at present include a main shaft 100 driven by a main motor to rotate, a thread frame 200, a feeding thread 300 installed on the thread frame 200, a thread lifting mechanism 400 connected between the main shaft 100 and one end of the thread frame 200, and a feeding mechanism 500 connected between the main shaft 100 and the other end of the thread frame 200, wherein the main shaft 100 drives the thread frame 200 and the feeding thread 300 to reciprocate up and down through the thread lifting mechanism 400, and the main shaft 100 drives the thread frame 200 and the feeding thread 300 to reciprocate back and forth through the feeding mechanism 500. Therefore, the feed dog 300 performs a compound motion of up-down reciprocating motion and back-and-forth reciprocating motion, and the motion track thereof is similar to an ellipse, as shown in fig. 2. Further, as shown in fig. 1, the feed lifting mechanism 400 includes a feed lifting shaft 401 parallel to the main shaft 100, a feed lifting eccentric 402 fixed to the main shaft 100, a feed lifting connecting rod 403, and a feed lifting crank 404 and a feed lifting fork 405 respectively fixed to both ends of the feed lifting shaft 401, wherein the feed lifting connecting rod 403 is connected to the feed lifting eccentric 402 and the feed lifting crank 404 at upper and lower ends thereof, and the feed lifting fork 405 is connected to the dental articulator 200 through a slider.
In the existing sewing machine shown in fig. 1, the transmission ratio of the main shaft 100 to the tooth frame 200 in the whole transmission process is fixed, so that the tooth lifting height of the feed tooth 300 (i.e. the distance from the upper surface of the needle plate when the feed tooth moves to the highest point) in the sewing machine is a fixed value, i.e. the value of the highest point in the operation process of the feed tooth 300 is fixed, and is set according to the machine type assembly process. However, different feed lifting tooth heights are required to improve the sewing level for different sewing materials in the existing market, and a sewing machine with the feed lifting tooth height being a fixed value obviously cannot meet the requirement, so that the market competitiveness of products is reduced.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, the present invention provides a feed lifting tooth height adjusting mechanism, which can adjust the height of a feed lifting tooth within a certain range.
In order to achieve the purpose, the invention provides a feed lifting tooth height adjusting mechanism which comprises a main shaft, a feed lifting tooth shaft parallel to the main shaft, a tooth rack, a feed feeding tooth arranged on the tooth rack, a first feed lifting tooth transmission assembly connected between the main shaft and the feed lifting tooth shaft, a second feed lifting tooth transmission assembly connected between the feed lifting tooth shaft and the tooth rack, an adjusting driving assembly, an adjusting stud movably arranged in a sewing machine shell and an adjusting operation part for driving the adjusting stud to move, wherein the first feed lifting tooth transmission assembly comprises a feed lifting tooth eccentric wheel fixed on the main shaft, a feed lifting tooth connecting rod, a first sliding block and a first feed lifting tooth swinging fork fixed on the feed lifting tooth shaft, one end of the feed lifting tooth connecting rod is rotatably sleeved on the periphery of the feed lifting tooth eccentric wheel, the other end of the feed lifting tooth connecting rod is hinged with the first sliding block, a first sliding groove is formed in the first feed lifting tooth swinging fork, and the first sliding block is positioned in the first sliding, The adjusting stud is in sliding fit with the first tooth lifting transmission assembly, and acts on a transmission part in the first tooth lifting transmission assembly through the adjusting driving assembly; when the adjusting operation part drives the adjusting stud to move, the position of the first sliding block in the first sliding groove in the extending direction of the first sliding groove is changed.
Further, the adjusting driving assembly comprises a rotating crank with a first fixed swing fulcrum O1, a connecting plate and a rotating driving unit connected between the rotating crank and the adjusting stud, wherein the rotating crank is hinged with one end of the connecting plate, and the other end of the connecting plate is coaxially hinged with the tooth lifting connecting rod and the first sliding block; when the adjusting stud moves, the adjusting stud rotates the rotating crank around a first fixed swing fulcrum O1 through the rotation driving unit.
Further, the rotation driving unit comprises a connecting sleeve and a rotation lever with a second fixed swing fulcrum O2, the connecting sleeve is rotatably installed at the end part of the adjusting stud, the end part of the connecting sleeve is hinged with a connecting pin parallel to the main shaft, one end of the rotation lever is provided with a sliding groove, the connecting pin at the end part of the connecting sleeve is located in the sliding groove at the end part of the rotation lever and is in sliding fit with the sliding groove, and the other end of the rotation lever is coaxially hinged with the rotation crank and the connecting plate.
Further, the rotary driving unit comprises an adjusting crank with a third fixed swing fulcrum O3 and an adjusting connecting rod, wherein the adjusting crank is abutted against the end part of the adjusting stud, one end of the adjusting connecting rod is hinged with the adjusting crank, and the other end of the adjusting connecting rod is coaxially hinged with the rotary crank and the connecting plate.
Furthermore, the rotation driving unit further comprises a pre-tightening tension spring, and two ends of the pre-tightening tension spring are respectively connected with the adjusting connecting rod and the bottom plate of the sewing machine.
Further, the adjusting crank is provided with an abutting plane, and the abutting plane abuts against the end part of the adjusting stud.
Furthermore, the adjusting stud is in threaded fit with the sewing machine shell, and the adjusting operation part is a knob fixed at the end part of the adjusting stud.
Furthermore, the adjusting stud is perpendicular to the main shaft and extends forwards and backwards along the direction that the feeding tooth forwards transfers the sewing material.
Furthermore, the second lifting tooth transmission assembly comprises a second sliding block and a second lifting tooth swinging fork fixed on the lifting tooth shaft, the second sliding block is hinged with the tooth frame, a second sliding groove is formed in the second lifting tooth swinging fork, and the second sliding block is located in the second sliding groove and is in sliding fit with the second sliding groove.
The application also provides a sewing machine, install as above in the sewing machine lifting teeth height adjustment mechanism.
As described above, the feed lifting height adjusting mechanism and the sewing machine according to the present invention have the following advantageous effects:
in this application, can change the position of first slider in first spout on first spout extending direction when adjusting the double-screw bolt and removing to change the main shaft and drive the swing range of lifting teeth axle wobbling, realize lifting teeth height's regulation, greatly improved sewing machine's commonality, make sewing machine strengthen greatly to the adaptability of different sewing materials, promoted the competitiveness of product.
Drawings
Fig. 1 is a schematic view showing a structure of a sewing machine in the prior art.
Fig. 2 is a schematic diagram of the motion track of the feeding tooth in fig. 1.
Fig. 3 is a schematic structural diagram of a feed lifting height adjusting mechanism in the present application.
Fig. 4 is an enlarged view of a circle a of fig. 3.
Fig. 5 to 7 are schematic views illustrating the connection between the first feed dog transmission assembly and the first adjustment driving assembly according to the first embodiment of the present application.
(in which the feed lifting shaft is omitted in FIG. 7.)
Fig. 8 is a schematic structural diagram of a first embodiment of an adjustment driving assembly according to the present application.
Fig. 9 is a schematic structural diagram of a second embodiment of an adjustment driving assembly in the present application.
FIG. 10 is a schematic diagram of a feed-dog height adjustment mechanism according to the present application.
Fig. 11 is a graph showing the change of the motion trajectory of the feeding teeth in the present application.
Description of the element reference numerals
10 spindle
20 lifting tooth shaft
30 dental articulator
40 feeding tooth
50 first tooth lifting transmission assembly
51 eccentric cam of lifting tooth
52 lifting tooth connecting rod
53 first slide
54 first feed dog swing fork
541 first chute
55 first connecting pin
60 second feed dog transmission assembly
61 second slide
62 second feed dog swing fork
621 second chute
63 second connecting pin
70 adjustment drive assembly
71 rotating crank
72 connecting plate
73 connecting sleeve
74 rotating lever
75 adjusting crank
751 abutting plane
76 adjusting connecting rod
77 pre-tightening tension spring
78 first supporting pin
79 fixing pin
710 second support pin
711 short pin
712 third support pin
80 adjusting stud
90 adjustment operation part
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 a sewing machine, such as a flat bed sewing machine. For convenience of description, the following embodiments define the directions as follows: as shown in fig. 3, the axial direction of the main shaft 10 in the sewing machine is defined as a left-right direction, the direction of the main shaft 10 towards the head of the sewing machine is a left direction (i.e. the left side of the paper surface in the view of fig. 3), and the direction of the main shaft 10 towards the tail of the sewing machine is a right direction (i.e. the right side of the paper surface in the view of fig. 3); the moving direction of the sewing material when the sewing machine is used for sewing is defined as a front direction.
The application provides an install lifting teeth height adjustment mechanism among the sewing machine. As shown in fig. 3, the feed dog height adjusting mechanism according to the present invention includes a main shaft 10 extending left and right, a feed dog shaft 20 parallel to the main shaft 10, a feed dog 30, a feed dog 40 mounted on the feed dog 30, a first feed dog transmission assembly 50 connected between the main shaft 10 and the feed dog shaft 20, a second feed dog transmission assembly 60 connected between the feed dog shaft 20 and the feed dog 30, an adjusting drive assembly 70, an adjusting stud 80 mounted in a sewing machine housing so as to be movable forward and backward, and an adjusting operation portion 90 for driving the adjusting stud 80 to move. As shown in fig. 5 to 7, the first lifting tooth transmission assembly 50 includes a lifting tooth eccentric wheel 51 fixedly locked on the main shaft 10 by a screw, a lifting tooth connecting rod 52, a first slide block 53, and a first lifting tooth swinging fork 54 fixedly locked on the lifting tooth shaft 20 by a screw, an upper end of the lifting tooth connecting rod 52 is rotatably sleeved on an outer periphery of the lifting tooth eccentric wheel 51, a lower end of the lifting tooth connecting rod 52 is hinged with the first slide block 53 by a first connecting pin 55 extending left and right, a first slide groove 541 is formed in the first lifting tooth swinging fork 54, the first slide block 53 is located in the first slide groove 541, and the two slide grooves are in sliding fit; preferably, the first sliding block 53 is in surface contact with the groove wall of the first sliding groove 541. The forward end of the adjustment stud 80 acts through the adjustment drive assembly 70 on a transmission member in the first feed dog transmission assembly 50. When the adjusting operation part 90 drives the adjusting stud 80 to move in the front-rear direction, the position of the first slider 53 in the first sliding groove 541 in the extending direction of the first sliding groove 541 is changed, so that the distance between the hinge point of the tooth lifting connecting rod 52 and the first slider 53 and the central axis of the tooth lifting shaft 20 is directly changed, that is, the effective length of the first tooth lifting swing fork 54 is changed, and therefore, the transmission efficiency of the composite crank-link slider mechanism formed by the tooth lifting connecting rod 52, the first slider 53 and the first tooth lifting swing fork 54 is changed, that is, the swing amplitude of the main shaft 10 driving the tooth lifting shaft 20 to swing through the first tooth lifting transmission assembly 50 is changed, and further, the amplitude of the tooth lifting shaft 20 driving the tooth frame 30 and the feed tooth 40 to reciprocate up and down through the second tooth lifting transmission assembly 60 is changed, and the automatic adjustment of the tooth lifting height is realized. Therefore, the feed lifting tooth height adjusting mechanism enables the feed lifting tooth height of the feed feeding tooth 40 to be adjustable within a certain range, the universality of the sewing machine is greatly improved, the adaptability of the sewing machine to different sewing materials is greatly enhanced, and the competitiveness of products is improved.
Preferably, as shown in fig. 3, the adjusting stud 80 is perpendicular to the main shaft 10 and extends forward and backward in the direction in which the feed dog 40 transfers the sewing material forward. The adjusting stud 80 is in threaded fit with the sewing machine shell, and the adjusting operation part 90 is a knob fixed at the rear end of the adjusting stud 80; when the knob is rotated, the adjusting stud 80 is driven to rotate together, and the adjusting stud 80 moves forwards or backwards relative to the machine shell while rotating, so that the adjusting stud 80 can be arranged in the machine shell of the sewing machine in a way of moving forwards and backwards.
The preferred embodiment of the second feed dog transmission assembly 60 is: as shown in fig. 3 to 4, the second lifting tooth transmission assembly 60 includes a second sliding block 61 and a second lifting tooth swinging fork 62 fixedly locked on the lifting tooth shaft 20 by a screw, the second sliding block 61 is hinged with the tooth frame 30 by a second connecting pin 63 extending left and right, a second sliding slot 621 is opened in the second lifting tooth swinging fork 62, and the second sliding block 61 is located in the second sliding slot 621 and is in sliding fit with the second sliding slot 621. Preferably, the second sliding block 61 is in surface contact with the groove wall of the second sliding groove 621.
The preferred embodiment of the adjustment drive assembly 70 is: as shown in fig. 5 to 7, the adjustment driving assembly 70 includes a first supporting pin 78 fixed to the housing and extending left and right, a rotating crank 71 having a rear end rotatably mounted to the first supporting pin 78, a connecting plate 72, and a rotation driving unit connected between the rotating crank 71 and the adjustment stud 80; the first support pin 78 constitutes a first fixed swing fulcrum O1 of the rotary crank 71; the front end of the rotating crank 71 is hinged with the front end of the connecting plate 72 through a fixing pin 79 extending left and right, the fixing pin 79 is fixed on the rotating crank 71, and the connecting plate 72 is hinged on the fixing pin 79; the rear end of the connecting plate 72, the lower end of the feed dog link 52 and the first slider 53 are coaxially hinged by the first connecting pin 55; when the adjustment stud 80 moves in the forward-backward direction, the adjustment stud 80 rotates the rotary crank 71 about the first fixed swing fulcrum O1 by the rotary drive unit. Therefore, the front end of the adjusting stud 80 acts on the first slider 53 in the first tooth lifting transmission assembly 50 via the adjusting drive assembly 70, the first slider 53 constituting a transmission member in the first tooth lifting transmission assembly 50.
When the sewing machine normally works, the position of the adjusting stud 80 relative to the sewing machine shell is kept unchanged, the rotating crank 71 is kept at a fixed position under the limiting action of the rotating driving unit and the adjusting stud 80, the position of the first sliding block 53 in the first sliding groove 541 is kept unchanged by the rotating crank 71 through the connecting plate 72, and therefore the distance between the hinge point of the feed lifting tooth connecting rod 52 and the first sliding block 53 and the central axis of the feed lifting tooth shaft 20 is kept unchanged. The main shaft 10 drives the cam 51 to rotate together, the first cam swinging fork 54 is driven to swing back and forth through the cam connecting rod 52 and the first sliding block 53, the first cam swinging fork 54, the cam shaft 20 and the second cam swinging fork 62 swing back and forth together, and the tooth frame 30 and the feeding tooth 40 are driven to move back and forth up and down through the second sliding block 61. Because the distance between the hinge point of the feed lifting tooth connecting rod 52 and the first sliding block 53 and the central axis of the feed lifting tooth shaft 20 is kept constant, and the swing amplitude of the first feed lifting tooth swing fork 54 is fixed, the swing amplitude of the main shaft 10 for driving the feed lifting tooth shaft 20 to swing back and forth through the first feed lifting tooth transmission component 50 is also kept constant, so that the motion amplitude of the feed lifting tooth shaft 20 for driving the tooth frame 30 and the feed lifting tooth 40 to move back and forth up and down through the second feed lifting tooth transmission component 60 is also kept constant, and the height of the feed lifting tooth 40 is also kept constant.
When the height of the lifting tooth is adjusted, the knob is rotated to drive the adjusting stud 80 to rotate together, the adjusting stud 80 moves forwards or backwards along the self axial direction while rotating through the thread fit between the adjusting stud 80 and the sewing machine shell, the rotating crank 71 rotates for an angle around the first supporting pin 78 through the rotation driving unit while the adjusting stud 80 moves, as shown in fig. 5 to 7 and fig. 10, the rotating crank 71 changes the angle, the connecting plate 72 acts on the first sliding block 53 to change the position of the first sliding block 53 in the first sliding groove 541 and simultaneously rotate the first lifting tooth swinging fork 54 for an angle, so that the lifting tooth shaft 20 rotates for a corresponding angle along with the first lifting tooth swinging fork 54 to change the spatial position of the first sliding block 53 (including the angle of the first sliding block 53 and the position of the first sliding block 53 in the first sliding groove 541 along the extending direction of the first sliding groove 541), that is, the spatial position of the hinge point of the feed lifting tooth connecting rod 52 and the first feed lifting tooth swinging fork 54 in the first feed lifting tooth transmission assembly 50 is changed, so that the transmission efficiency from the main shaft 10 to the feed lifting tooth shaft 20 is changed, the swinging amplitude of the main shaft 10 for driving the feed lifting tooth shaft 20 to swing through the first feed lifting tooth transmission assembly 50 is changed, the amplitude of the feed lifting tooth shaft 20 for driving the tooth frame 30 and the feed lifting tooth 40 to reciprocate up and down through the second feed lifting tooth transmission assembly 60 is changed, and the automatic adjustment of the feed lifting tooth height is realized. When the swing amplitude of the feed lifting tooth shaft 20 is increased, the swing amplitude of the second feed lifting tooth swing fork 62 is correspondingly increased, so that the motion amplitude of the vertical reciprocating motion of the tooth frame 30 and the feed feeding tooth 40 is also increased; at this time, as shown in fig. 11, the movement locus of the feed dog 40 changes from the curve S1 to the curve S2, and the feed dog height becomes high, which belongs to the high feed dog height mode. Conversely, when the swing amplitude of the feed lifting tooth shaft 20 is smaller, the swing amplitude of the second feed lifting tooth swing fork 62 is correspondingly smaller, so that the motion amplitude of the vertical reciprocating motion of the tooth frame 30 and the feed feeding tooth 40 is also smaller; at this time, as shown in fig. 11, the movement locus of the feed dog 40 changes from the curve S1 to the curve S3, and the feed dog height becomes low, which belongs to the low feed dog height mode. The angle of the position of the crank handle 71 thus determines the change in height of the feed dog 40. Meanwhile, as can be seen from fig. 11, in the present application, when the feed dog 40 is adjusted in the feed dog height, the needle pitch of the sewing machine is kept unchanged, so that the sewing quality is not affected. The Z direction in fig. 11 indicates the tooth lifting height of the feeding tooth 4040, and the X direction in fig. 11 indicates the needle pitch.
Further, the rotary drive unit connected between the adjusting stud 80 and the rotary crank 71 has the following two preferred embodiments.
First embodiment of the rotational driving unit, as shown in fig. 5 to 8, the rotational driving unit includes a connection sleeve 73, a second support pin 710 fixed to the cabinet and extending left and right, and a rotational lever 74 rotatably mounted to the second support pin 710; the second support pin 710 constitutes a second fixed swing fulcrum O2 of the turning lever 74; the connecting sleeve 73 is rotatably arranged at the front end of the adjusting stud 80, but the connecting sleeve 73 and the adjusting stud 80 cannot move relatively; a connecting pin parallel to the main shaft 10 is hinged in a fork opening part at the front end of the connecting sleeve 73, the connecting pin is a short pin 711 extending left and right, two ends of the short pin 711 are installed on the connecting sleeve 73 through snap springs, a fork opening part is arranged at the upper end of the rotating lever 74, the fork opening part is also a sliding groove, the short pin 711 at the front end of the connecting sleeve 73 is positioned in the sliding groove at the upper end of the rotating lever 74, and the two are in sliding fit; the lower end of the turning lever 74 also has a fork portion, and the fork portion at the lower end of the turning lever 74, the turning crank 71 and the link plate 72 are coaxially hinged by the above-mentioned fixing pin 79, and the fixing pin 79 is located in the fork portion at the lower end of the turning lever 74 and the two are slidably fitted. When the tooth lifting height of the feeding tooth 40 is adjusted, the adjusting stud 80 moves back and forth to drive the connecting sleeve 73 to move back and forth together, so that the rotating lever 74 is driven to rotate around the second supporting pin 710, the rotating crank 71 is driven to rotate around the first supporting pin 78 by the rotating lever 74, and the tooth lifting height of the feeding tooth 40 is adjusted.
As shown in fig. 9, the second embodiment of the rotational driving unit includes a third support pin 712 fixed to the housing and extending left and right, an adjusting crank 75 rotatably mounted on the third support pin 712, an adjusting link 76, and a biasing tension spring 77; the third support pin 712 constitutes a third fixed swing fulcrum O3 of the adjustment crank 75; the adjustment crank 75 has an abutment plane 751 at the rear end, and the abutment plane 751 abuts against the front end of the adjustment stud 80; the upper end of the adjusting connecting rod 76 is hinged with the front end of the adjusting crank 75 through a short pin 711 extending left and right, and the lower end of the adjusting connecting rod 76, the rotating crank 71 and the connecting plate 72 are coaxially hinged through the fixing pin 79; the upper end of the pre-tightening tension spring 77 is connected with a fixing screw fixed on the adjusting connecting rod 76, the lower end of the pre-tightening tension spring 77 is connected with the bottom plate of the sewing machine, the pre-tightening tension spring 77 applies acting force to the adjusting connecting rod 76, and the abutting plane 751 at the rear end of the adjusting crank 75 is always abutted to the front end of the adjusting stud 80 through the adjusting connecting rod 76. When the height of the feed dog 40 is adjusted, the adjusting stud 80 moves back and forth to rotate the adjusting crank 75 around the third support pin 712, and the adjusting crank 75 drives the rotating crank 71 to rotate around the first support pin 78 through the adjusting connecting rod 76, so that the height of the feed dog 40 is adjusted.
In summary, the composite crank-link slider mechanism is used to connect the main shaft 10 and the feed lifting teeth shaft 20, and the transmission efficiency of the composite crank-link slider mechanism can be changed by rotating the knob, so that the swing amplitude of the first feed lifting teeth swing fork 54, the feed lifting teeth shaft 20 and the second feed lifting teeth swing fork 62 is changed, the feed lifting teeth height of the feed feeding teeth 40 is adjusted, and the operation is very simple and convenient. Meanwhile, the adaptability of the sewing machine to sewing materials is enhanced by adjusting the height of the lifting teeth of the feeding teeth 40, the wrinkling phenomenon of the sewing materials can be improved by reducing the height of the lifting teeth of the feeding teeth 40 when thin materials are sewn, and the cloth feeding efficiency can be effectively improved by increasing the height of the lifting teeth of the feeding teeth 40 when thick materials are sewn and peduncle sewing is carried out, so that the cloth feeding is smoother. In particular, in the present application, when the feed dog 40 is adjusted in the feed dog height, the needle pitch of the sewing machine is kept unchanged, so that the sewing quality is not affected. 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 lifting tooth height adjustment mechanism, includes main shaft (10), feed lifting tooth axle (20) that is on a parallel with main shaft (10), dental articulator (30), install pay-off tooth (40) on dental articulator (30), connect first feed lifting tooth transmission unit (50) between main shaft (10) and feed lifting tooth axle (20), and connect second feed lifting tooth transmission unit (60) between feed lifting tooth axle (20) and dental articulator (30), its characterized in that: also comprises an adjusting driving component (70), an adjusting stud (80) movably arranged in the sewing machine shell, and an adjusting operation part (90) driving the adjusting stud (80) to move, the first lifting tooth transmission component (50) comprises a lifting tooth eccentric wheel (51) fixed on the main shaft (10), a lifting tooth connecting rod (52), a first sliding block (53) and a first lifting tooth swinging fork (54) fixed on the lifting tooth shaft (20), one end of the feed lifting connecting rod (52) is rotatably sleeved on the periphery of the feed lifting eccentric wheel (51), the other end of the lifting tooth connecting rod (52) is hinged with a first sliding block (53), a first sliding groove (541) is arranged in the first lifting tooth swinging fork (54), the first sliding block (53) is positioned in the first sliding groove (541) and is in sliding fit with the first sliding groove, the adjusting stud (80) acts on a transmission part in the first tooth lifting transmission assembly (50) through an adjusting driving assembly (70); when the adjusting operation part (90) drives the adjusting stud (80) to move, the position of the first slide block (53) in the first sliding groove (541) in the extending direction of the first sliding groove (541) is changed.
2. The feed lifting mechanism according to claim 1, wherein: the adjusting driving assembly (70) comprises a rotating crank (71) with a first fixed swing fulcrum O1, a connecting plate (72) and a rotating driving unit connected between the rotating crank (71) and an adjusting stud (80), wherein the rotating crank (71) is hinged with one end of the connecting plate (72), and the other end of the connecting plate (72) is coaxially hinged with the tooth lifting connecting rod (52) and the first sliding block (53); when the adjusting stud (80) moves, the adjusting stud (80) enables the rotating crank (71) to rotate around a first fixed swing fulcrum O1 through a rotating driving unit.
3. The feed lifting mechanism according to claim 2, wherein: the rotation driving unit comprises a connecting sleeve (73) and a rotation lever (74) with a second fixed swing fulcrum O2, the connecting sleeve (73) is rotatably installed at the end part of the adjusting stud (80), the end part of the connecting sleeve (73) is hinged with a connecting pin parallel to the main shaft (10), one end of the rotation lever (74) is provided with a sliding groove, the connecting pin at the end part of the connecting sleeve (73) is located in the sliding groove at the end part of the rotation lever (74) and is in sliding fit with the connecting pin, and the other end of the rotation lever (74) is coaxially hinged with the rotation crank (71) and the connecting plate (72).
4. The feed lifting mechanism according to claim 2, wherein: the rotary driving unit comprises an adjusting crank (75) with a third fixed swing fulcrum O3 and an adjusting connecting rod (76), wherein the adjusting crank (75) is abutted against the end part of an adjusting stud (80), one end of the adjusting connecting rod (76) is hinged to the adjusting crank (75), and the other end of the adjusting connecting rod (76) is coaxially hinged to the rotary crank (71) and the connecting plate (72).
5. The feed lifting mechanism according to claim 4, wherein: the rotary driving unit further comprises a pre-tightening tension spring (77), and two ends of the pre-tightening tension spring (77) are connected with the adjusting connecting rod (76) and the bottom plate of the sewing machine respectively.
6. The feed lifting mechanism according to claim 4, wherein: the adjustment crank (75) has an abutment plane (751), and the abutment plane (751) abuts against an end of the adjustment stud (80).
7. The feed lifting mechanism according to claim 1, wherein: the adjusting stud (80) is in threaded fit with the sewing machine shell, and the adjusting operation part (90) is a knob fixed at the end part of the adjusting stud (80).
8. The feed lifting mechanism according to claim 1, wherein: the adjusting stud (80) is perpendicular to the main shaft (10) and extends forwards and backwards along the direction that the feeding tooth (40) forwards transfers the sewing material.
9. The feed lifting mechanism according to claim 1, wherein: the second tooth lifting transmission assembly (60) comprises a second sliding block (61) and a second tooth lifting swing fork (62) fixed on the tooth lifting shaft (20), the second sliding block (61) is hinged with the tooth frame (30), a second sliding groove (621) is formed in the second tooth lifting swing fork (62), and the second sliding block (61) is located in the second sliding groove (621) and is in sliding fit with the second sliding groove (621).
10. A sewing machine characterized by: the sewing machine 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 |
|---|---|---|---|
| CN201910905843.9A CN112626726B (en) | 2019-09-24 | 2019-09-24 | Feed lifting height adjusting mechanism and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910905843.9A CN112626726B (en) | 2019-09-24 | 2019-09-24 | Feed lifting height adjusting mechanism and sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112626726A true CN112626726A (en) | 2021-04-09 |
| CN112626726B CN112626726B (en) | 2022-07-05 |
Family
ID=75282781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910905843.9A Active CN112626726B (en) | 2019-09-24 | 2019-09-24 | Feed lifting height adjusting mechanism and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112626726B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208366U (en) * | 1986-04-10 | 1987-10-31 | 飞马缝纫机制造株式会社 | Feeding mechanism of barrel shaped sewing machine |
| JPH04164485A (en) * | 1990-10-30 | 1992-06-10 | Juki Corp | Track adjusting mechanism for cloth feeding tooth of sewing machine |
| CN104233644A (en) * | 2014-09-02 | 2014-12-24 | 蔡金财 | Sewing machine for up-down differential feeding |
| CN204058891U (en) * | 2014-09-30 | 2014-12-31 | 浙江万维机械有限公司 | A kind of feed dog of Sewing machines rises and falls adjustable apparatus |
| CN108611770A (en) * | 2018-06-01 | 2018-10-02 | 杰克缝纫机股份有限公司 | A kind of lifting pressre of sewing machine structure and sewing machine |
-
2019
- 2019-09-24 CN CN201910905843.9A patent/CN112626726B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208366U (en) * | 1986-04-10 | 1987-10-31 | 飞马缝纫机制造株式会社 | Feeding mechanism of barrel shaped sewing machine |
| JPH04164485A (en) * | 1990-10-30 | 1992-06-10 | Juki Corp | Track adjusting mechanism for cloth feeding tooth of sewing machine |
| CN104233644A (en) * | 2014-09-02 | 2014-12-24 | 蔡金财 | Sewing machine for up-down differential feeding |
| CN204058891U (en) * | 2014-09-30 | 2014-12-31 | 浙江万维机械有限公司 | A kind of feed dog of Sewing machines rises and falls adjustable apparatus |
| CN108611770A (en) * | 2018-06-01 | 2018-10-02 | 杰克缝纫机股份有限公司 | A kind of lifting pressre of sewing machine structure and sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112626726B (en) | 2022-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109208188B (en) | Automatic needle pitch adjusting mechanism and sewing machine | |
| CN112626730B (en) | Sewing machine | |
| CN107558014B (en) | Cloth feeding mechanism and sewing machine | |
| CN112626734B (en) | Sewing machine | |
| CN107761258B (en) | Cloth feeding adjusting mechanism of sewing machine | |
| CN112626726B (en) | Feed lifting height adjusting mechanism and sewing machine | |
| CN214736549U (en) | Sewing machine | |
| CN112626737B (en) | Transmission clutch mechanism and sewing machine | |
| JP2009247377A (en) | Sewing machine | |
| CN111304838B (en) | Cloth feeding mechanism with adjustable cloth feeding time sequence and sewing machine | |
| CN112626733B (en) | Feed lifting height adjusting method for sewing machine | |
| CN112626731B (en) | Feed lifting mechanism with adjustable feed lifting height and sewing machine | |
| CN112626732B (en) | Feed lifting mechanism with adjustable feed lifting height and sewing machine | |
| CN107700081B (en) | Flat seaming machine and cloth feeding mechanism thereof | |
| JP2682346B2 (en) | Needle feed / lower feed switching device for sewing machines with needle feed function | |
| JPH07328258A (en) | Flat sewing machine provided with up-feeding mechanism | |
| CN112796042B (en) | Sewing machine | |
| CN218345649U (en) | Cloth feeding and thread cutting integrated driving sewing machine | |
| CN112626724A (en) | Feed lifting mechanism with adjustable feed lifting height and sewing machine | |
| CN112626725B (en) | Feeding tooth lifting tooth height adjustable mechanism and sewing machine | |
| CN115247323B (en) | Sewing machine control method | |
| CN114481460B (en) | Flush joint machine | |
| SE457804B (en) | TRANSPORT TRANSMISSION DEVICE FOR SEWING MACHINES | |
| CN212611264U (en) | Roller machine needle pitch adjusting mechanism and roller machine | |
| JP2734743B2 (en) | Upper feed drive mechanism for sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
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. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Applicant before: JACK SEWING MACHINE Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |