CN107558014B - Cloth feeding mechanism and sewing machine - Google Patents
Cloth feeding mechanism and sewing machine Download PDFInfo
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- CN107558014B CN107558014B CN201710851442.0A CN201710851442A CN107558014B CN 107558014 B CN107558014 B CN 107558014B CN 201710851442 A CN201710851442 A CN 201710851442A CN 107558014 B CN107558014 B CN 107558014B
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Abstract
The invention provides a cloth feeding mechanism and a sewing machine, wherein the cloth feeding mechanism comprises a main shaft, a feed lifting shaft, a cloth feeding shaft, a feed lifting eccentric wheel, a cloth feeding eccentric wheel, a feed lifting transmission unit connected between the feed lifting eccentric wheel and the feed lifting shaft, and a cloth feeding transmission unit connected between the feed feeding eccentric wheel and the feed feeding shaft, wherein the feed lifting eccentric wheel or the feed feeding eccentric wheel is fixed on the main shaft; the feed delivery eccentric wheel is provided with a first connecting part, the feed delivery eccentric wheel is provided with a second connecting part, and the first connecting part and the second connecting part are mutually sleeved; when the cloth feeding mechanism is in a cloth feeding state, the first connecting part and the second connecting part are relatively static, so that the feed lifting tooth shaft and the cloth feeding shaft are driven to swing respectively; when the eccentric angle of the cloth feeding is adjusted, the first connecting portion and the second connecting portion rotate relatively, the included angle between the eccentricity of the cloth feeding and the eccentricity of the lifting tooth is adjusted within a certain range, the eccentric time of the cloth feeding is changed, the requirement of adjusting the eccentric time of the cloth feeding after thick material sewing is met, and the adaptability of thick materials of the sewing machine is improved.
Description
Technical Field
The invention relates to a cloth feeding mechanism.
The invention also relates to a sewing machine comprising the cloth feeding mechanism.
Background
At present, as shown in fig. 1, a cloth feeding mechanism in a sewing machine mainly includes a main shaft 700 driven by a motor to rotate, a feed lifting tooth shaft 800 and a cloth feeding shaft 900 parallel to the main shaft 700, an eccentric wheel fixed on the main shaft 700, a feed lifting tooth transmission unit, and a cloth feeding transmission unit; as shown in fig. 2, the eccentric wheel includes a feed lifting connection section, a main shaft connection section, and a feed delivery connection section along an axial direction thereof, the main shaft connection section is fixed to the main shaft using screws, the feed lifting connection section is eccentric to the main shaft connection section and connected to the feed lifting shaft 800 through a feed lifting transmission unit, and the feed delivery connection section is eccentric to the main shaft connection section and connected to the feed delivery shaft 900 through a feed delivery transmission unit. When the main shaft 700 rotates, the eccentric wheel is driven to synchronously rotate, the main shaft 700 drives the feed lifting shaft 800 to swing through the feed lifting connecting section and the feed lifting transmission unit, the main shaft 700 drives the feed feeding shaft 900 to swing through the feed feeding connecting section and the feed feeding transmission unit, the feed lifting shaft 800 acts on the tooth frame and drives the tooth frame to swing up and down, the feed feeding shaft 900 acts on the tooth frame and drives the tooth frame to swing back and forth, and finally the tooth frame and the feed feeding teeth arranged on the tooth frame are driven to move along a preset feed feeding track to realize feed feeding.
Further, in the cloth feeding mechanism, the eccentric wheel is an integral part and is fixed on the main shaft through a screw, so that the relative position between the cloth feeding eccentricity and the tooth lifting eccentricity is fixed, and the cloth feeding eccentricity time cannot be changed. However, when thick materials are sewn, the cloth feeding eccentric time needs to be adjusted by several degrees, otherwise, the cloth feeding is unsmooth; obviously, the prior art cloth feeding mechanism cannot meet the above requirements.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a cloth feeding mechanism capable of adjusting a cloth feeding eccentricity time within a certain range.
In order to achieve the above object, the present invention provides a cloth feeding mechanism, comprising a main shaft, a feed lifting shaft, a cloth feeding shaft, a feed lifting eccentric wheel, a cloth feeding eccentric wheel, a feed lifting transmission unit connected between the feed lifting eccentric wheel and the feed lifting shaft, and a cloth feeding transmission unit connected between the feed feeding eccentric wheel and the feed feeding shaft, wherein the feed lifting eccentric wheel or the feed feeding eccentric wheel is fixed on the main shaft; the feed lifting eccentric wheel is provided with a first connecting part, the feed conveying eccentric wheel is provided with a second connecting part, and the first connecting part and the second connecting part are mutually sleeved; when the cloth feeding mechanism is in a cloth feeding state, the first connecting part and the second connecting part are relatively static; when the cloth feeding eccentric angle is adjusted, the first connecting part and the second connecting part rotate relatively.
Furthermore, the second connecting part is provided with a containing cavity for containing the first connecting part; the outer peripheral surface of the first connecting portion is provided with a clamping groove extending along the circumferential direction of the first connecting portion, the second connecting portion is connected with a set screw in a threaded mode, and the end portion of the set screw is located in the clamping groove and is abutted to the first connecting portion.
Preferably, the clamping groove is a V-shaped groove, and the end of the set screw has a conical part matched with the V-shaped groove.
Furthermore, the first connecting part is provided with an adjusting notch, and the first connecting part is respectively provided with a first notch end face and a second notch end face at two ends of the adjusting notch; the second connecting portion is provided with an adjusting connecting portion protruding towards the adjusting notch, an adjusting screw is connected in the adjusting connecting portion in a threaded mode, and the end portion of the adjusting screw is abutted to the end face of the first notch.
Preferably, the first connecting portion is provided with an accommodating hole at the end face of the second notch, a spring is installed in the accommodating hole, one end of the spring is fixed to the first connecting portion, and the other end of the spring abuts against the adjusting connecting portion.
Further, the end of the adjusting screw is provided with a hemispherical surface abutting against the first cut end surface.
Preferably, the second connecting portion is provided with an operation notch at the adjusting connecting portion, and the adjusting screw is exposed from the operation notch.
Furthermore, the tooth lifting eccentric wheel is provided with a tooth lifting connecting part eccentric to the first connecting part, the tooth lifting transmission unit comprises a tooth lifting connecting rod and a tooth lifting driving crank fixed on the tooth lifting shaft, and two ends of the tooth lifting connecting rod are respectively hinged with the tooth lifting connecting part and the tooth lifting driving crank.
Furthermore, the cloth feeding eccentric wheel is provided with a cloth feeding connecting part eccentric to the second connecting part, the cloth feeding transmission unit comprises a first cloth feeding connecting rod, a second cloth feeding connecting rod and a cloth feeding driving crank fixed on the cloth feeding shaft, two ends of the first cloth feeding connecting rod are respectively hinged with the cloth feeding connecting part and one end of the second cloth feeding connecting rod, and the other end of the second cloth feeding connecting rod is hinged with the cloth feeding driving crank.
The invention also provides a sewing machine, wherein the cloth feeding mechanism is arranged in the sewing machine.
As described above, the cloth feeding mechanism and the sewing machine according to the present invention have the following advantageous effects:
in this application, when the sewing machine shut down, realize adjusting the contained angle between work feed off-centre and the feed lifting teeth off-centre in the certain limit through first connecting portion and the relative rotation of second connecting portion, thereby change work feed off-centre time, and at sewing machine operation in-process, realize driving separately through the relative stillness of first connecting portion and second connecting portion and lift the swing of tooth axle and work feed axle, thereby make the sewing machine can satisfy the demand of back transfer work feed off-centre time when thick material is made up, improve sewing machine's thick material adaptability.
Drawings
Fig. 1 is a schematic structural diagram of a cloth feeding mechanism in the prior art.
Fig. 2 is a schematic structural view of a cloth feeding eccentric wheel in the prior art.
Fig. 3 is a schematic view of the structure of the sewing machine of the present application.
Fig. 4 is a schematic structural diagram of the cloth feeding mechanism in the present application.
Fig. 5 is a schematic connection diagram of the main shaft, the feed lifting eccentric wheel and the feed conveying eccentric wheel in fig. 4.
Fig. 6 is a schematic view showing the connection between the feed lifting eccentric and the feed lifting eccentric of fig. 5, which is an exploded view.
Fig. 7 is a schematic structural view of the tooth lifting eccentric wheel in fig. 4.
Fig. 8 is a schematic structural view of the cloth feeding eccentric wheel in fig. 4.
Fig. 9 is a schematic structural diagram of the feed-forward gear unit in the present application.
Fig. 10 and 11 are schematic structural views of the cloth feeding transmission unit in the present application.
Fig. 12 is a schematic diagram of the adjustment of the cloth feeding eccentricity time in the present application.
Description of the element reference numerals
1 spindle
101 first shaft section
102 second shaft section
2 lifting tooth shaft
3 cloth feeding shaft
4 eccentric cam of lifting tooth
41 first connection part
42 card slot
43 adjustment incision
44 first cut end face
45 second cut end face
46 receiving hole
47 lifting tooth connecting part
5 cloth feeding eccentric wheel
51 second connection part
52 accommodating cavity
53 adjusting connection
54 operation incision
55 cloth feeding connecting part
6 set screw
61 conical part
7 adjusting screw
71 hemisphere surface
8 spring
9 dental articulator
91 first driving runner
92 second drive slide
10 feed dog
111 lifting tooth connecting rod
112 feed lifting teeth driving crank
113 first slider
114 second slide
121 first cloth feeding connecting rod
122 second cloth feeding connecting rod
123 cloth feeding driving crank
124 cloth feeding crank
125 third cloth feeding connecting rod
131 adjustable supporting shaft
132 adjusting crank
133 needle pitch adjusting connecting rod
134 adjusting copper sleeve
135 adjusting screw
136 stop block
14 lower shell
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.
In the following examples, the directions are defined as follows: defining the axial direction of the main shaft 1 as the left-right direction, defining one end of the main shaft 1 facing the head of the sewing machine as the left direction, and defining one end of the main shaft 1 facing the tail of the sewing machine as the right direction; therefore, as shown in fig. 3, the left side of the paper surface is the left direction, the right side of the paper surface is the right direction, the upper side of the paper surface is the upper direction, the lower side of the paper surface is the lower direction, the front side of the paper surface is the rear direction, and the back side of the paper surface is the front direction.
As shown in FIG. 3, the present application provides a cloth feeding mechanism installed in a lower housing 14 of a sewing machine. As shown in fig. 4 to 8, the cloth feeding mechanism comprises a main shaft 1, a feed lifting shaft 2, a cloth feeding shaft 3, a feed lifting eccentric wheel 4, a cloth feeding eccentric wheel 5, a feed lifting transmission unit connected between the feed lifting eccentric wheel 4 and the feed lifting shaft 2, and a cloth feeding transmission unit connected between the feed feeding eccentric wheel 5 and the cloth feeding shaft 3, wherein the main shaft 1, the feed lifting shaft 2 and the cloth feeding shaft 3 are parallel and axially extend along the left-right direction, the feed lifting eccentric wheel 4 and the cloth feeding eccentric wheel 5 are two independent parts, and the feed lifting eccentric wheel 4 or the cloth feeding eccentric wheel 5 is fixed on the main shaft 1 through a screw extending along the radial direction of the main shaft 1; in particular, the left end of the feed lifting eccentric wheel 4 is provided with a first connecting part 41, the right end of the feed conveying eccentric wheel 5 is provided with a second connecting part 51, and the first connecting part 41 and the second connecting part 51 are sleeved with each other; when the cloth feeding mechanism is in a cloth feeding state, the first connecting part 41 and the second connecting part 51 are relatively static, so that the feed lifting eccentric 4 and the cloth feeding eccentric 5 rotate synchronously with the main shaft 1. The first connecting part 41, the second connecting part 51 and the main shaft 1 are coaxially arranged, the right end of the feed lifting eccentric wheel 4 is provided with a feed lifting connecting part 47 eccentric to the first connecting part 41 and used for being connected with a feed lifting transmission unit, and the left end of the feed conveying eccentric wheel 5 is provided with a feed conveying connecting part 55 eccentric to the second connecting part 51 and used for being connected with a feed conveying transmission unit.
In the operation process of the sewing machine provided with the cloth feeding mechanism, the first connecting part 41 and the second connecting part 51 are relatively static, so that the feed lifting eccentric wheel 4 and the cloth feeding eccentric wheel 5 are also relatively static. Therefore, the motor drives the main shaft 1 to rotate, the main shaft 1 drives the feed lifting eccentric wheel 4 and the feed conveying eccentric wheel 5 to synchronously rotate, the feed lifting eccentric wheel 4 drives the feed lifting shaft 2 to swing through the feed lifting transmission unit, and the feed lifting shaft 2 acts on the tooth rack 9 and drives the tooth rack 9 to swing up and down; meanwhile, the cloth feeding eccentric wheel 5 drives the cloth feeding shaft 3 to swing through the cloth feeding transmission unit, and the cloth feeding shaft 3 acts on the tooth frame 9 to drive the tooth frame 9 to swing back and forth; thereby, the feed dog 9 and the feed dog 10 fixed at the upper end of the feed dog 9 perform feed motion, and the motion track of the feed dog 10 and the feed dog 9 is a combination of up-down motion and front-back motion, and thus is an elliptical motion track, as shown in fig. 12. Under normal conditions, the relative position between the feed lifting tooth connecting part 47 on the feed lifting tooth eccentric wheel 4 and the feed cloth connecting part 55 on the feed feeding eccentric wheel 5 is fixed, so that the feed cloth eccentric angle is fixed, the position of the elliptic motion trail relative to the needle plate is also fixed, and the feed cloth eccentric time is also fixed; when the thickness of the sewing material changes, for example, when the sewing material is thick, in order to make the cloth feeding more smooth, the cloth feeding eccentric time needs to be adjusted later, at this time, the sewing machine stops rotating, and the first connecting part 41 and the second connecting part 51 rotate relatively, so that the relative position between the feed lifting tooth connecting part 47 on the feed lifting tooth eccentric wheel 4 and the cloth feeding connecting part 55 on the feed feeding eccentric wheel 5 changes, namely, the included angle between the feed feeding eccentric center and the feed lifting tooth eccentric is adjusted within a certain range, the cloth feeding eccentric angle changes, the interval between the cloth feeding time and the feed lifting tooth time also changes, or the time difference between the feed lifting tooth movement and the start of the cloth feeding movement changes, so that the movement track of the feed lifting tooth 10 in fig. 12 changes from the elliptical movement track K1 to the elliptical movement track K2, and then the cloth feeding eccentric time is adjusted later, and finally the sewing machine can meet the requirement of adjusting the cloth feeding eccentric time later when the sewing material is thick, the thick material adaptability of the sewing machine is improved. When the first connecting portion 41 and the second connecting portion 51 are relatively rotated, the feed pitch is not changed because the feed eccentricity between the feed connecting portion 55 and the main shaft 1 and the feed eccentricity between the feed connecting portion 47 and the main shaft 1 are not changed; or, the application realizes the stepless adjustment of the cloth feeding eccentric time in a certain range on the premise of not changing the size of the needle pitch.
The following description will be given of a preferred embodiment of the connection structure of the feed cam 5 and the feed cam 4, taking the example in which the feed cam 4 is fixed to the main shaft 1.
As shown in fig. 6 to 8, a receiving cavity 52 is formed in the second connecting portion 51 for receiving the first connecting portion 41; a circle of clamping grooves 42 extending along the circumferential direction of the first connecting portion 41 are formed in the outer circumferential surface of the first connecting portion 41, a set screw 6 is connected to the second connecting portion 51 in a threaded manner, and the end portion of the set screw 6 is located in the clamping grooves 42 and is abutted to the first connecting portion 41. The first connecting portion 41 is provided with an adjusting notch 43, the adjusting notch 43 penetrates through the first connecting portion 41 along the radial direction of the first connecting portion 41, and the first connecting portion 41 is provided with a first notch end face 44 and a second notch end face 45 at two ends of the adjusting notch 43; the second connecting portion 51 is provided with an adjusting connecting portion 53 protruding toward the adjusting notch 43, an adjusting screw 7 is connected to the adjusting connecting portion 53 through a thread, and the end of the adjusting screw 7 abuts against the first notch end face 44. During operation of the sewing machine, the set screw 6 abuts against the slot 42 to lock the first connecting portion 41 and the second connecting portion 51 so that they are relatively stationary. When the cloth feeding eccentric angle needs to be adjusted, the adjusting screw 7 is rotated, and the adjusting screw 7 feeds along the axial direction of the adjusting screw; because the feed lifting eccentric wheel 4 is fixed on the main shaft 1, the adjusting screw 7 can rotate for an angle relative to the feed lifting eccentric wheel 4 through acting force and reacting force while feeding axially, and the set screw 6 is screwed and locked after the feed lifting eccentric wheel 5 is adjusted to a proper position. The specific position of the adjusting notch 43 on the first connecting part 41 is set according to actual requirements, and the adjusting range of the cloth feeding eccentric angle can be limited by changing the position of the adjusting notch 43.
Preferably, as shown in fig. 6 to 8, the locking groove 42 is a V-shaped groove, or a triangular groove, and the end of the set screw 6 has a conical portion 61 adapted to the V-shaped groove, and the two are matched to each other to limit the axial displacement between the feed lifting eccentric 4 and the feed eccentric 5 during the adjustment of the feed eccentric angle. The first connecting portion 41 is provided with a receiving hole 46 at the second notch end face 45, a spring 8 is installed in the receiving hole 46, one end of the spring 8 is fixed with the first connecting portion 41, and the other end of the spring 8 is abutted with the adjusting connecting portion 53, so that in the process of adjusting the cloth feeding eccentric angle, the phenomenon of random shaking of the position of the cloth feeding eccentric wheel 5 can be avoided, and the cloth feeding mechanism can still normally and stably run after adjustment. The end of the adjusting screw 7 has a semi-spherical surface 71 abutting against the first cut end surface 44, so that the adjusting screw 7 and the first cut end surface 44 are always in a contact state. The second connecting portion 51 is opened with an operation notch 54 at the adjusting connecting portion 53, and the adjusting screw 7 is exposed from the operation notch 54 to facilitate the rotation of the adjusting screw 7.
As shown in fig. 9, the feed dog transmission unit comprises a feed dog connecting rod 111 and a feed dog driving crank 112 fixed on the feed dog shaft 2, wherein the front end of the feed dog connecting rod 111 is rotatably mounted on the periphery of a feed dog connecting part 47 on the feed dog eccentric wheel 4 through a bearing, and the rear end of the feed dog connecting rod 111 is hinged with the feed dog driving crank 112; the main shaft 1 drives the feed lifting eccentric wheel 4 to rotate, and drives the feed lifting shaft 2 to swing through the feed lifting connecting rod 111 and the feed lifting driving crank 112. In addition, the structure that the feed lifting shaft 2 drives the tooth rack 9 to swing up and down is as follows: the rear end of the dental articulator 9 is provided with a first driving sliding groove 91, the left end of the feed lifting shaft 2 is hinged with a first sliding block 113, and the first sliding block 113 is matched with the first driving sliding groove 91 and can slide in the first driving sliding groove 91 along the extending direction of the first driving sliding groove 91. In particular, as shown in fig. 5 and 9, the right end of the main shaft 1 has a first shaft section 101 matched with the tooth lifting eccentric wheel 4 and the cloth feeding eccentric wheel 5, the left end has a second shaft section 102 matched with the tooth holder 9, the second shaft section 102 is eccentric to the first shaft section 101, the second shaft section 102 is hinged with a second sliding block 114, the front end of the tooth holder 9 has a second driving chute 92, the second sliding block 114 is matched with the second driving chute 92 and can slide in the second driving chute 92 along the extending direction of the second driving chute 92, so that the main shaft 1 drives the tooth holder 9 to swing up and down through the second sliding block 114 while rotating, and the front end and the rear end of the tooth holder 9 can swing up and down with the same amplitude under the action of the main shaft 1 and the tooth lifting shaft 2.
As shown in fig. 10 and 11, the cloth feeding transmission unit includes a first cloth feeding link 121, a second cloth feeding link 122, and a cloth feeding driving crank 123 fixed to the cloth feeding shaft 3, wherein an upper end of the first cloth feeding link 121 is rotatably mounted to an outer circumference of the cloth feeding connecting portion 55 of the cloth feeding eccentric 5 through a bearing, a lower end of the first cloth feeding link 121 is hinged to a front end of the second cloth feeding link 122, and a rear end of the second cloth feeding link 122 is hinged to the cloth feeding driving crank 123. In addition, the structure that the feed shaft 3 drives the tooth rack 9 to swing back and forth is as follows: the left end of the cloth feeding shaft 3 is fixed with a cloth feeding crank 124, the cloth feeding crank 124 is hinged with the rear end of a third cloth feeding connecting rod 125, and the front end of the third cloth feeding connecting rod 125 is connected with the dental articulator 9 through a screw.
Further, the cloth feeding mechanism further comprises a needle pitch adjusting unit, as shown in fig. 3, 10 and 11, the needle pitch adjusting unit comprises an adjusting support shaft 131 parallel to the feed lifting rod 2, an adjusting crank 132 fixed on the adjusting support shaft 131, a needle pitch adjusting link 133, an adjusting copper sleeve 134 fixed in the lower housing 14, an adjusting screw 135 in threaded fit with the adjusting copper sleeve 134, and a limiting block 136 fixed at the front end of the adjusting screw 135; the adjusting support shaft 131 is rotatably installed in the lower casing 14, and the rear end of the adjusting screw 135 is located outside the lower casing 14; a long groove is formed in the adjusting crank 132, the adjusting screw 135 penetrates through the long groove, and the limiting block 136 is used for limiting the adjusting screw 135 to be separated from the long groove; the front end of the pitch adjusting link 133 is coaxially hinged to the lower end of the first cloth feeding link 121 and the front end of the second cloth feeding link 122, and the rear end of the pitch adjusting link 133 is hinged to the adjusting crank 132. Therefore, when the needle pitch is adjusted, the adjusting screw 135 is rotated, the adjusting screw 135 is fed along the axial direction thereof, and the adjusting crank 132 and the adjusting support shaft 131 are driven to rotate around the central axis of the adjusting support shaft 131 through an angle, the position of the hinge point of the first cloth feeding connecting rod 121 and the second cloth feeding connecting rod 122 is changed through the needle pitch adjusting connecting rod 133, so that the swing amplitude of the main shaft 1 driving the cloth feeding shaft 3 to swing is changed, and finally the swing amplitude of the cloth feeding shaft 3 driving the tooth frame 9 to swing back and forth is changed, and the adjustment of the needle pitch is realized.
In the above embodiment, the main shaft 1, the feed lifting dog shaft 2, the cloth feeding shaft 3 and the adjusting support shaft 131 are rotatably supported in the copper bush, and the copper bush is fixedly installed in the lower housing 14 in an interference fit manner.
The invention also provides a sewing machine, wherein the cloth feeding mechanism is arranged in the sewing machine.
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 (9)
1. The utility model provides a cloth feeding mechanism, includes main shaft (1), lifts tooth axle (2), cloth feeding axle (3), lifts tooth eccentric wheel (4), cloth feeding eccentric wheel (5), connects the tooth of lifting tooth transmission unit between tooth eccentric wheel (4) and tooth lifting tooth axle (2) and connects the cloth feeding transmission unit between cloth feeding eccentric wheel (5) and cloth feeding axle (3), its characterized in that: the tooth lifting eccentric wheel (4) or the cloth feeding eccentric wheel (5) is fixed on the main shaft (1); the feed lifting eccentric wheel (4) is provided with a first connecting part (41), the feed conveying eccentric wheel (5) is provided with a second connecting part (51), the first connecting part (41) and the second connecting part (51) are mutually sleeved, the first connecting part (41) is provided with an adjusting notch (43), and the first connecting part (41) is respectively provided with a first notch end face (44) and a second notch end face (45) at two ends of the adjusting notch (43); an adjusting connecting part (53) protruding towards the adjusting notch (43) is arranged on the second connecting part (51), an adjusting screw (7) is connected in the adjusting connecting part (53) in a threaded manner, and the end part of the adjusting screw (7) is abutted to the end surface (44) of the first notch; when the cloth feeding mechanism is in a cloth feeding state, the first connecting part (41) and the second connecting part (51) are relatively static; when adjusting the eccentric angle of the cloth feeding, the adjusting screw (7) is rotated to rotate the cloth feeding eccentric wheel (5) relative to the feed lifting eccentric wheel (4) by an angle, so that the first connecting part (41) and the second connecting part (51) rotate relatively.
2. The cloth feed mechanism of claim 1, wherein: an accommodating cavity (52) for accommodating the first connecting part (41) is formed in the second connecting part (51); the outer peripheral surface of the first connecting portion (41) is provided with a clamping groove (42) extending along the circumferential direction of the first connecting portion (41), the second connecting portion (51) is connected with a set screw (6) in a threaded mode, and the end portion of the set screw (6) is located in the clamping groove (42) and is abutted to the first connecting portion (41).
3. The cloth feed mechanism of claim 2, wherein: the clamping groove (42) is a V-shaped groove, and the end part of the set screw (6) is provided with a conical part (61) matched with the V-shaped groove.
4. The cloth feed mechanism of claim 1, wherein: an accommodating hole (46) is formed in the second notch end face (45) of the first connecting portion (41), a spring (8) is installed in the accommodating hole (46), one end of the spring (8) is fixed to the first connecting portion (41), and the other end of the spring (8) is abutted to the adjusting connecting portion (53).
5. The cloth feed mechanism of claim 1, wherein: the end of the adjusting screw (7) is provided with a hemispherical surface (71) which is abutted with the first notch end surface (44).
6. The cloth feed mechanism of claim 1, wherein: the second connecting part (51) is provided with an operation notch (54) at the position of the adjusting connecting part (53), and the adjusting screw (7) is exposed from the operation notch (54).
7. The cloth feed mechanism of claim 1, wherein: the tooth lifting eccentric wheel (4) is provided with a tooth lifting connecting part (47) eccentric to the first connecting part (41), the tooth lifting transmission unit comprises a tooth lifting connecting rod (111) and a tooth lifting driving crank (112) fixed on the tooth lifting shaft (2), and two ends of the tooth lifting connecting rod (111) are respectively hinged with the tooth lifting connecting part (47) and the tooth lifting driving crank (112).
8. The cloth feed mechanism of claim 1, wherein: the cloth feeding transmission unit comprises a first cloth feeding connecting rod (121), a second cloth feeding connecting rod (122) and a cloth feeding driving crank (123) fixed on the cloth feeding shaft (3), wherein the cloth feeding eccentric wheel (5) is provided with a cloth feeding connecting part (55) eccentric to the second connecting part (51), the two ends of the first cloth feeding connecting rod (121) are hinged to the cloth feeding connecting part (55) and one end of the second cloth feeding connecting rod (122), and the other end of the second cloth feeding connecting rod (122) is hinged to the cloth feeding driving crank (123).
9. A sewing machine characterized by: the sewing machine is provided with a cloth feeding mechanism of any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851442.0A CN107558014B (en) | 2017-09-19 | 2017-09-19 | Cloth feeding mechanism and sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851442.0A CN107558014B (en) | 2017-09-19 | 2017-09-19 | Cloth feeding mechanism and sewing machine |
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| CN107558014A CN107558014A (en) | 2018-01-09 |
| CN107558014B true CN107558014B (en) | 2020-03-31 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842311A (en) * | 2018-07-11 | 2018-11-20 | 杰克缝纫机股份有限公司 | A kind of sewing machine and its feed device |
| CN109505072B (en) * | 2019-01-14 | 2021-04-06 | 杰克缝纫机股份有限公司 | Cloth feeding mechanism of sewing machine and sewing machine |
| CN109706627B (en) * | 2019-01-14 | 2021-02-02 | 杰克缝纫机股份有限公司 | Sewing machine and feeding mechanism thereof |
| CN111663254A (en) * | 2019-03-05 | 2020-09-15 | 杰克缝纫机股份有限公司 | Sewing machine and needle pitch adjusting structure thereof |
| CN112626725B (en) * | 2019-09-24 | 2022-08-23 | 杰克科技股份有限公司 | Feeding tooth lifting tooth height adjustable mechanism and sewing machine |
| CN112853630B (en) * | 2019-11-28 | 2022-11-11 | 杰克科技股份有限公司 | Feed lifting mechanism with adjustable feed lifting height and flat seaming machine |
| CN112981739B (en) * | 2019-12-13 | 2022-06-21 | 杰克科技股份有限公司 | Overedger and eccentric adjustable structure of lifting tooth thereof |
| CN112981738B (en) * | 2019-12-13 | 2022-07-05 | 杰克科技股份有限公司 | Lifting tooth height adjusting mechanism and overedger |
| CN111020892B (en) * | 2019-12-18 | 2022-06-21 | 杰克科技股份有限公司 | Sewing machine with adjustable tooth track |
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| US9027488B2 (en) * | 2013-10-02 | 2015-05-12 | Shing Ray Sewing Machine Co., Ltd | Direct drive cloth feeding mechanism of sewing machine |
| CN106012337A (en) * | 2016-08-03 | 2016-10-12 | 杰克缝纫机股份有限公司 | Stitch length and differential regulating mechanism and sewing machine |
| CN106988031A (en) * | 2017-06-02 | 2017-07-28 | 杰克缝纫机股份有限公司 | A kind of sewing machine |
| CN107090670A (en) * | 2017-07-05 | 2017-08-25 | 杰克缝纫机股份有限公司 | A kind of thick stuff sewing machine |
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| CN107558014A (en) | 2018-01-09 |
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