CN113957620B - Sewing machine feed mechanism and sewing machine - Google Patents
Sewing machine feed mechanism and sewing machine Download PDFInfo
- Publication number
- CN113957620B CN113957620B CN202111236716.8A CN202111236716A CN113957620B CN 113957620 B CN113957620 B CN 113957620B CN 202111236716 A CN202111236716 A CN 202111236716A CN 113957620 B CN113957620 B CN 113957620B
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- connecting rod
- cloth feeding
- swing
- seat
- reversing
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
-
- 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 discloses a cloth feeding mechanism of a sewing machine, which comprises a rack seat provided with a cloth feeding tooth, a cloth feeding transmission unit and a lifting tooth transmission unit; the length direction of the tooth frame seat is consistent with the length direction of the bottom plate of the sewing machine, the tooth frame seat is provided with an assembling end and a driving end which are opposite to each other in the length direction, the cloth feeding teeth are arranged at the assembling end of the tooth frame seat, and the cloth feeding driving unit acts on the driving end of the tooth frame seat and provides power for the cloth feeding teeth to swing back and forth; the lifting tooth transmission unit provides power for the cloth feeding tooth to swing up and down through a cantilever part, and the length direction of the cantilever part is consistent with the length direction of the tooth frame seat; according to the invention, the precision of the cloth feeding track is improved by optimizing the structures, the positions and the transmission modes of the cloth feeding transmission unit and the lifting tooth transmission unit, the needle pitch can be adjusted, and the adjustment mode is rapid and convenient.
Description
Technical Field
The invention belongs to the technical field of sewing machines, and particularly relates to a cloth feeding mechanism of a sewing machine.
Background
The cloth feeding mechanism is arranged on the sewing machine and used for driving the cloth feeding teeth to do back-and-forth reciprocating motion and up-and-down reciprocating motion, so that cloth feeding is realized, the existing cloth feeding mechanism comprises a cloth feeding tooth, a cloth feeding unit and a lifting tooth transmission assembly, wherein the cloth feeding unit drives the cloth feeding teeth to do back-and-forth reciprocating motion, the lifting tooth transmission assembly drives the cloth feeding teeth to do up-and-down reciprocating motion, the movements of the cloth feeding teeth in two directions are matched to form a cloth feeding tooth movement track so as to complete cloth feeding action, and the movements of the cloth feeding teeth are synchronously matched with the movements of a sewing needle, so that cloth is moved; in the prior art, due to the limitation of the structure and the transmission mode of the sewing machine, the cloth feeding unit and the lifting tooth transmission component act on the cloth feeding teeth through different force application parts, so that the movement of the cloth feeding teeth in two directions is easy to generate matching errors, and the cloth feeding precision is influenced; furthermore, the cloth feeding unit and the lifting tooth transmission assembly are required to be additionally provided with a power source for driving, the energy consumption structure is complex, and the synchronous matching of the cloth feeding action and the sewing needle action is easy to generate errors, so that the sewing quality is affected.
Disclosure of Invention
The invention provides a cloth feeding mechanism of a sewing machine, aiming at the problems that the transmission mode of a cloth feeding unit and a lifting tooth transmission assembly in the prior art is limited, a power source is required to be additionally arranged, and the synchronous matching of the cloth feeding action and the sewing needle action is easy to generate errors.
The invention aims at realizing the following technical scheme:
a cloth feeding mechanism of a sewing machine comprises
A feed dog member;
the bracket seat is arranged along the length direction of the sewing machine bottom plate, and the middle part of the bracket seat is provided with a pivoting part and can horizontally rotate; the tooth feeding tooth component is arranged at the assembling end of the tooth frame seat;
the swinging feeding component acts on the transmission end of the dental frame seat and provides horizontal swinging power for the dental frame seat;
the lifting tooth transmission component acts on the assembly end of the tooth frame seat and provides power for upward movement for the tooth frame seat, so that the tooth frame seat is elastically deformed.
Preferably, the lifting tooth transmission assembly comprises a cantilever part, wherein the front part of the cantilever part is provided with a hinge part and can swing up and down; the length direction of the cantilever part is consistent with the length direction of the dental framework seat, and a force application end and a force bearing end which are opposite are arranged in the length direction;
the force application end of the cantilever part is positioned below the dental frame seat assembly part, and the force bearing end of the cantilever part and the transmission end of the dental frame are positioned on the same side;
the hinge part is close to the force application end and forms a labor-saving lever.
Preferably, the cantilever member is driven by the lower shaft: the lower shaft is provided with a lifting tooth eccentric wheel, and the lifting tooth eccentric wheel drives the stress end of the cantilever part through a lifting tooth connecting rod; the lower shaft and the upper shaft are linked through an upper synchronizing wheel, a lower synchronizing wheel and a synchronous belt.
Preferably, the swing feeding assembly comprises a feeding cam, a feeding cam connecting rod and a feeding force applying connecting rod, wherein the feeding cam is sleeved on the upper shaft, the upper end of the feeding force applying connecting rod is hinged to a needle bar swinging shaft and extends towards the dental frame seat, and the needle bar swinging shaft is arranged below the upper shaft in parallel.
Preferably, the swing feeding component is provided with a distance adjusting part, the distance adjusting part is arranged between the cloth feeding cam connecting rod and the cloth feeding force applying connecting rod, and the swing track of the cloth feeding force applying connecting rod is adjusted so as to change the swing track of the dental frame seat.
Preferably, the distance adjusting part comprises a stepping motor, a swinging seat and a distance adjusting crank connected with the stepping motor and the swinging seat in a transmission way, and a distance adjusting swing rod assembly used for limiting the swinging track of the cloth feeding cam connecting rod and the cloth feeding force applying connecting rod is arranged in the swinging seat.
Preferably, the distance adjusting swing rod assembly comprises a first distance adjusting swing rod and a second distance adjusting swing rod which are sequentially arranged between the swing seat and the cloth feeding cam connecting rod, wherein the same side ends of the first distance adjusting swing rod and the second distance adjusting swing rod are coaxially connected with the cloth feeding cam connecting rod, the other end of the first distance adjusting swing rod is hinged with the swing seat, and the other end of the second distance adjusting swing rod is hinged to the middle part of the cloth feeding force application connecting rod.
Preferably, the swing feeding assembly is provided with a reversing part, and the reversing part is arranged between the cloth feeding force applying connecting rod and the dental frame seat and is used for converting the force applying direction of the cloth feeding force applying connecting rod.
Preferably, the assembly end of the dental rest seat is provided with an assembly groove, the assembly part of the feed dog member is embedded in the assembly groove through a pin, the force application end of the cantilever part is provided with a limit groove, and the limit groove is arranged on the upper end surface of the cantilever part and corresponds to the position of the assembly groove on the dental rest seat; the pin penetrates through the bottom of the assembly groove and extends into the limiting groove, and the contour of the limiting groove is adapted to the movement track of the pin along with the dental frame seat.
A sewing machine comprises the sewing machine cloth feeding mechanism.
Compared with the prior art, the invention has the following beneficial effects: the invention optimizes the setting positions, the structure and the transmission mode of the tooth frame seat, the swing feeding assembly and the tooth lifting transmission assembly, and the two can realize cloth feeding by utilizing the self-power source of the sewing machine in a matching way, so that a power source is not required to be additionally provided for the cloth feeding action, and the matching degree of the cloth feeding action and the needle feeding action is higher; the needle distance of the sewing machine can be adjusted by changing the transmission mode of the swinging feeding assembly and matching with the distance adjusting part, and the adjustment mode is quick and convenient; the structure positions of the tooth frame seat and the lifting arm piece are reasonable, the coordination degree is high, acting forces in two directions directly act on the tooth frame seat, and the motion track errors of the feed tooth component in the horizontal direction and the vertical direction are reduced, so that the feed precision is effectively improved; by optimizing the transmission mode, the distribution of all functional units of the sewing machine is more reasonable, the stress of a driving shaft is more uniform, and the driving is more stable and labor-saving.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a swing feeding assembly according to the present invention;
FIG. 3 is a schematic view of a distance adjusting part according to the present invention;
FIG. 4 is a schematic diagram of a reversing section according to the present invention;
FIG. 5 is a schematic view of a lifting tooth transmission assembly according to the present invention;
FIG. 6 is a schematic view of the relationship between the dental bracket base and the cantilever member according to the present invention;
FIG. 7 is a schematic view of a dental frame base according to the present invention;
FIG. 8 is a schematic view of a cantilever structure according to the present invention;
the marks in the figure: a feed dog member 10; a dental frame base 20; a pivot portion 21; a fitting groove 22; a pin 23; a cloth feed cam 31; a feed cam link 32; a feed force-applying link 33; a distance adjusting part 34; a stepping motor 341; a swing base 342; a pitch crank 343; a first pitch adjustment rocker 344; a second pitch adjustment swing link 345; a reversing section 35; a rotation shaft 351; the first reversing swing link 352; a second reversing swing link 353; a first reversing link 354; a second reversing link 355; lifting the tooth eccentric 41; a lifting link 42; a gear set 43; a needle bar 51; a needle bar swing seat 52; a needle bar swinging shaft 53; an upper shaft 60; an upper synchronizing wheel 61; a lower synchronizing wheel 62; a lower shaft 63; a rotating shuttle shaft 70; cantilever member 80; a hinge 81; a pad 82; limit groove 83.
Description of the embodiments
As shown in fig. 1 to 8, the present embodiment discloses a cloth feeding mechanism of a sewing machine, which comprises a cloth feeding tooth member 10, a tooth frame base 20, a swinging feeding assembly for swinging the tooth frame base 20 back and forth on a horizontal plane, and a lifting tooth transmission assembly for swinging the tooth frame base 20 upward on a vertical plane.
The length direction of the dental frame seat 20 is consistent with the length direction of the sewing machine bottom plate, the middle part of the dental frame seat is provided with a pivoting part 21 and can horizontally rotate, and the pivoting part 21 is provided with a ball bearing; the dental frame seat 20 is provided with an assembling end and a driving end which are opposite along the length direction, the assembling end is positioned below the needle rod 51, the cloth feeding tooth component 10 is arranged at the assembling end of the dental frame seat 20, and the swinging feeding component acts on the driving end of the dental frame seat 20 and swings the dental frame seat 20 in a horizontal plane;
the lifting tooth transmission assembly comprises a cantilever part 80, and the front part of the cantilever part is provided with a hinge part 81 and can swing up and down;
the cantilever part 80 provides power for the upper and lower swing of the feed dog member 10 by utilizing the lever principle; the length direction of the cantilever 80 is consistent with the length direction of the dental frame base 20; the cantilever member 80 has opposite force application end and force receiving end, the force application end is positioned below the assembly part of the dental frame base 20, and the force receiving end is positioned on the same side as the transmission end of the dental frame and is in transmission connection with the tooth lifting transmission assembly;
the dental frame base 20 is a tough, abrasion-resistant hard material, such as spring steel; when the cantilever 80 is tilted upward and abuts against the front end of the dental frame seat, the front end of the dental frame seat is slightly elastically deformed, and is bent upward by about 1mm, thereby realizing upward movement of the feed dog member 10. The cantilever 80 moves downwards and the dental frame seat is restored; the acting forces in the horizontal direction and the vertical direction are directly acted on the dental frame seat 20, and after the dental frame seat 20 couples the acting forces in the two directions, the feeding tooth component 10 is driven to do arc track movement, so that the matching degree of the movement of the feeding tooth component 10 in the two directions is ensured, and the feeding accuracy and the smoothness are effectively improved.
The lifting tooth transmission assembly further comprises a lifting tooth eccentric wheel 41 and a lifting tooth connecting rod 42, wherein the lifting tooth connecting rod 42 is fixedly connected with the stressed end of the cantilever part 80, the lifting tooth eccentric wheel 41 is fixedly arranged on a lower shaft 63 of the sewing machine, the lower shaft 63 drives a rotating shuttle shaft 70 through a pair of gear sets 43, and the gear sets 43 adopt helical gears, so that the transmission is more stable, and the noise is reduced; the cantilever 80 forms a labor-saving lever through the hinge 81, so that the lower shaft 63 can swing the dental floss carrier 20 and the feed dog member 10 upward with a small driving force, and the fulcrum thereof is disposed near the force application end, thereby reducing the driving force required. In this embodiment, the hinge 81 is a support shaft with a central axis disposed in a horizontal direction.
According to the scheme, through improving the structures, the arrangement positions and the transmission modes of the frame seat, the swing feeding assembly and the lifting tooth transmission assembly, the two transmission units realize cloth feeding action by utilizing the driving force of the sewing machine, a power source is not required to be additionally arranged, the swing feeding assembly obtains the driving force from the upper shaft 60 for driving the needle rod 51 of the sewing machine to move, and the lifting tooth transmission assembly obtains the driving force from the lower shaft 63 for driving the rotating shuttle mechanism of the sewing machine; the upper shaft 60 and the lower shaft 63 are arranged along the length direction of the bottom plate of the sewing machine, and the upper shaft 60 and the lower shaft 63 are linked through the upper synchronizing wheel 61, the lower synchronizing wheel 62 and a synchronous belt (not shown), so that the height matching of the cloth feeding action and the sewing needle action is ensured.
In this embodiment, the force application member is a cushion block 82 made of plastic, and the cushion block 82 is detachably mounted at the force application end of the cantilever member 80, so as to facilitate replacement, and is in surface contact with the lower end surface of the assembly end of the dental frame base 20, so as to reduce wear.
As shown in fig. 2, the swing feeding assembly includes a feeding cam 31, a feeding cam link 32, and a feeding force applying link 33, wherein the feeding cam 31 is sleeved on the upper shaft 60, the upper end of the feeding force applying link 33 is hinged to one end of a needle bar swing shaft 53 and extends towards the dental bracket seat 20, the needle bar swing shaft 53 is arranged below the upper shaft 60 in parallel, and the other end of the needle bar swing shaft 53 is hinged to a needle bar swing seat 52.
In order to adjust the stitch length to adapt to different fabrics, the swing feeding assembly is provided with a distance adjusting part 34, as shown in fig. 3, the distance adjusting part 34 is arranged between the feeding cam connecting rod 32 and the feeding force applying connecting rod 33, and adjusts the swing track of the feeding force applying connecting rod 33 to change the swing track of the dental frame seat 20, and the distance adjusting part 34 can finally change the feeding track of the feeding tooth member 10 by changing the swing track of the feeding force applying connecting rod 33, thereby achieving the purpose of adjusting the stitch length.
The distance adjusting part 34 comprises a stepping motor 341, a swinging seat 342 and a distance adjusting crank 343 which is connected with the stepping motor 341 and the swinging seat 342 in a transmission way, a distance adjusting swinging rod assembly which is used for limiting the swinging track of the cloth feeding cam connecting rod 32 and the cloth feeding force applying connecting rod 33 is arranged in the swinging seat 342, when the needle distance needs to be adjusted, the stepping motor 341 controls the distance adjusting crank 343 to rotate to a target position, the swinging seat 342 rotates along with the distance adjusting crank 343, and the swinging track of the cloth feeding cam connecting rod 32 and the swinging track of the cloth feeding force applying connecting rod 33 are adjusted by matching with the swinging rod assembly; the distance adjusting swing rod assembly comprises a first distance adjusting swing rod 344 and a second distance adjusting swing rod 345 which are sequentially arranged between a swing seat 342 and a cloth feeding cam connecting rod 32, the same side end of the first distance adjusting swing rod 344 and the same side end of the second distance adjusting swing rod 345 are coaxially connected with the cloth feeding cam connecting rod 32, the other end of the first distance adjusting swing rod 344 is hinged with the swing seat 342, the other end of the second distance adjusting swing rod is hinged to the middle part of the cloth feeding force applying connecting rod 33, the arrangement of the swing rod assembly ensures the freedom degree of the cloth feeding cam connecting rod 32 and the cloth feeding force applying connecting rod 33 in the swing direction, the swing track of the first distance adjusting swing rod is adjusted on the premise that the swing track of the lower end of the cloth feeding cam connecting rod 32 is not influenced, the swing track of the upper end of the second distance adjusting swing rod 345 is limited, the lower end of the second distance adjusting swing rod 345 is hinged to the middle part of the cloth feeding force applying connecting rod 33, and the swing amplitude of the cloth feeding force applying connecting rod 33 is limited, and the aim of adjusting the needle distance is achieved. In order to make the force applied to the feed cam link 32 and the feed force application link 33 more uniform, lateral offset is avoided during swinging so as to improve the transmission precision of the whole swinging feeding assembly, in this embodiment, two groups of swinging rod assemblies are provided, and the two groups of swinging rod assemblies are symmetrically arranged on two sides of the feed cam link 32 and the feed force application link 33.
The bracket seat 20 is provided with a pivoting part 21, the pivoting part 21 is arranged between the assembly end and the transmission end and is arranged close to the assembly end, and the rotating pointing point is arranged close to the rotating end, so that the swing with larger amplitude of the transmission end can be converted into the swing with smaller amplitude, the track radian of the feed tooth component 10 in the horizontal direction is reduced, and the smoothness of feed action and the accuracy of the feed direction are ensured; in this embodiment, the pivot portion 21 is a ball bearing with a central axis disposed along a vertical direction, so as to reduce the swing resistance of the dental frame base 20, and also limit the positions of the dental frame base 20 in other directions, so as to ensure that the dental frame base swings only along a horizontal direction.
The reversing part 35 is arranged on the swinging feeding assembly, as shown in fig. 4, the reversing part 35 is arranged between the feeding force application connecting rod 33 and the dental frame seat 20, and is used for converting the transmission direction of the feeding force application connecting rod 33, the feeding force application connecting rod is used for reversing before applying force to the dental frame seat 20 so as to ensure that the feeding action is matched with the needle running action, the swinging direction of the assembling end and the transmission end is opposite because the rotating center of the dental frame seat 20 is arranged between the assembling end and the transmission end, and the swinging feeding assembly and the needle rod 51 are driven by the upper shaft 60, so that the swinging direction of the feeding force application connecting rod 33 is matched with the movement direction of the needle rod 51, and the swinging direction of the transmission end of the dental frame seat 20 is required to be reversed in order to ensure that the feeding action and the needle running action are synchronously matched.
The reversing part 35 comprises a rotating shaft 351 which is arranged along the horizontal direction, a first reversing swing rod 352, a second reversing swing rod 353, a first reversing connecting rod 354 and a second reversing connecting rod 355; the upper end of the first reversing swing rod 352 is rotationally connected with one end of the first reversing connecting rod 354, the other end of the first reversing connecting rod 354 is rotationally connected with the driving end of the dental frame seat 20, the lower end of the first reversing swing rod 352 is fixedly connected with the rotating shaft 351, and in order to ensure the smoothness of the linkage of the first reversing swing rod 352, the first reversing connecting rod 354 and the dental frame seat 20, the rotationally connected positions are all connected by adopting a ball head; the upper end of the second reversing swing rod 353 is fixedly connected with the rotating shaft 351, the lower end of the second reversing swing rod 353 is rotationally connected with one end of the second reversing connecting rod 355, and the other end of the second reversing connecting rod 355 is rotationally connected with the cloth feeding force applying connecting rod 33. The reversing section 35 reverses the swinging force applied to the dental floss holder 20 by the feed-application link 33 on the premise of ensuring that the feed-application link 33 and the dental floss holder 20 have degrees of freedom in the swinging direction by the cooperation of the two reversing links and the two reversing links.
In order to improve the mounting stability of the feed dog member 10, it is ensured that it can move synchronously with the holder 20, the fitting end of the holder 20 is provided with a fitting groove 22, the fitting portion of the feed dog member 10 is fitted into the fitting groove 22, the degree of freedom in the feed direction is restricted by the fitting groove 22, and the feed dog member 10 is fixed in the fitting groove 22 by a pin 23.
The force application end of the cantilever 80 is also provided with a limit groove 83, and the limit groove 83 is arranged on the upper end surface of the cantilever 80 and corresponds to the position of the assembly groove 22 on the dental bracket seat 20; the fixed feed dog member 10 is fed through the pin 23 to penetrate the bottom of the fitting groove 22 and extend into the limit groove 83; the profile of the limit groove 83 adapts to the motion track of the pin 23 along with the dental frame base 20, in this embodiment, two pins 23 and two limit grooves 83 are provided, the limit groove 83 is an arc-shaped long groove with two ends, and the length direction of the limit groove is along the cloth feeding direction. The limit groove 83 cooperates with the pin 23 to maintain the relative positional relationship between the dental frame base 20 and the cantilever 80, thereby avoiding the deviation beyond the target direction in the process of moving the dental frame base and the cantilever 80 and improving the cooperation degree of the dental frame base and the cantilever.
According to the cloth feeding mechanism of the sewing machine, disclosed by the invention, through optimizing the positions, the structures and the transmission modes of the swing feeding assembly and the lifting tooth transmission assembly, the distribution of all functional units of the sewing machine is more reasonable, the stress of a driving shaft is more uniform, and the driving is more labor-saving and stable; the matching degree of the cloth feeding action and the needle moving action is high without providing a power source for the cloth feeding action; by arranging the distance adjusting part 34, the stitch length can be adjusted according to different sewing requirements, and the adjustment process is simple and convenient; the matching degree of the dental frame base 20 and the cantilever part 80 is high, and the cloth feeding action is smooth and accurate.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A cloth feeding mechanism of a sewing machine is characterized by comprising
A feed dog member;
the bracket seat is arranged along the length direction of the sewing machine bottom plate, and the middle part of the bracket seat is provided with a pivoting part and can be horizontally and rotatably arranged on the bracket body; the tooth feeding tooth component is arranged at the assembling end of the tooth frame seat;
the swinging feeding component acts on the transmission end of the dental frame seat and provides horizontal swinging power for the dental frame seat;
the tooth lifting transmission component acts on the assembly end of the tooth rack seat and provides power for upward movement for the tooth rack seat, so that the assembly end of the tooth rack seat is elastically deformed upward to a certain extent; the lifting tooth transmission assembly comprises a cantilever part, the front part of the cantilever part is provided with a hinge part and can swing up and down and is arranged on the frame body; the cantilever part is provided with a force application end and a force bearing end which are opposite in the length direction; the force application end of the cantilever part is positioned below the assembly part of the dental frame seat, and the force bearing end of the cantilever part and the transmission end of the dental frame are positioned on the same side;
the swing feeding assembly comprises a feeding cam, a feeding cam connecting rod and a feeding force application connecting rod, the feeding cam is sleeved on the upper shaft, the upper end of the feeding force application connecting rod is hinged to a needle bar swing shaft and extends towards the dental frame seat, and the needle bar swing shaft is arranged below the upper shaft in parallel;
the swing feeding component is provided with a reversing part, and the reversing part is arranged between the cloth feeding force applying connecting rod and the dental frame seat and is used for converting the force applying direction of the cloth feeding force applying connecting rod;
the reversing part (35) comprises a rotating shaft (351) which is arranged along the horizontal direction, a first reversing swing rod (352), a second reversing swing rod (353), a first reversing connecting rod (354) and a second reversing connecting rod (355); the upper end of the first reversing swing rod (352) is rotationally connected with one end of a first reversing connecting rod (354), the other end of the first reversing connecting rod (354) is rotationally connected with the transmission end of the dental framework seat (20), and the lower end of the first reversing swing rod (352) is fixedly connected with the rotating shaft (351);
ball joints are adopted to connect the first reversing swing rod (352) and the first reversing connecting rod (354) and the dental frame seat (20);
the upper end of the second reversing swing rod (353) is fixedly connected with the rotating shaft (351), the lower end of the second reversing swing rod (353) is rotationally connected with one end of the second reversing connecting rod (355), and the other end of the second reversing connecting rod (355) is rotationally connected with the cloth feeding force application connecting rod (33).
2. A cloth feeding mechanism for a sewing machine according to claim 1, wherein the cantilever member is driven by the following shaft: the lower shaft is provided with a lifting tooth eccentric wheel, and the lifting tooth eccentric wheel drives the stress end of the cantilever part through a lifting tooth connecting rod; the lower shaft and the upper shaft are linked through an upper synchronizing wheel, a lower synchronizing wheel and a synchronous belt.
3. The cloth feeding mechanism of the sewing machine according to claim 1, wherein the assembly end of the dental frame seat is provided with an assembly groove, the assembly part of the cloth feeding tooth component is embedded in the assembly groove through a pin, the force application end of the cantilever piece is provided with a limit groove, and the limit groove is arranged on the upper end surface of the cantilever piece and corresponds to the position of the assembly groove on the dental frame seat; the pin penetrates through the bottom of the assembly groove and extends into the limiting groove, and the contour of the limiting groove is adapted to the movement track of the pin along with the dental frame seat.
4. The cloth feeding mechanism of claim 1, wherein the swing feeding assembly is provided with a distance adjusting part, the distance adjusting part is arranged between the cloth feeding cam connecting rod and the cloth feeding force applying connecting rod, and the swing track of the cloth feeding force applying connecting rod is adjusted to change the swing track of the dental frame seat.
5. The cloth feeding mechanism of claim 4, wherein the distance adjusting part comprises a stepping motor, a swinging seat and a distance adjusting crank connected with the stepping motor and the swinging seat in a transmission way, and a distance adjusting swing rod assembly used for limiting the swinging track of the cloth feeding cam connecting rod and the cloth feeding force applying connecting rod is arranged in the swinging seat.
6. The cloth feeding mechanism of claim 5, wherein the distance adjusting swing rod assembly comprises a first distance adjusting swing rod and a second distance adjusting swing rod which are sequentially arranged between the swing seat and the cloth feeding cam connecting rod, wherein the same side end of the first distance adjusting swing rod and the same side end of the second distance adjusting swing rod are coaxially connected with the cloth feeding cam connecting rod, the other end of the first distance adjusting swing rod is hinged with the swing seat, and the other end of the second distance adjusting swing rod is hinged to the middle part of the cloth feeding force applying connecting rod.
7. A sewing machine comprising the sewing machine feed mechanism of any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236716.8A CN113957620B (en) | 2021-10-23 | 2021-10-23 | Sewing machine feed mechanism and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236716.8A CN113957620B (en) | 2021-10-23 | 2021-10-23 | Sewing machine feed mechanism and sewing machine |
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| Publication Number | Publication Date |
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| CN113957620A CN113957620A (en) | 2022-01-21 |
| CN113957620B true CN113957620B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111236716.8A Active CN113957620B (en) | 2021-10-23 | 2021-10-23 | Sewing machine feed mechanism and sewing machine |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3527183A (en) * | 1969-02-25 | 1970-09-08 | Singer Co | Work feeding mechanisms for sewing machines |
| JPH02172492A (en) * | 1988-12-26 | 1990-07-04 | Mitsubishi Electric Corp | Walking bar mechanism for sewing machine |
| JP2004223013A (en) * | 2003-01-23 | 2004-08-12 | Juki Corp | Lower feed mechanism of sewing machine |
| CN112626734B (en) * | 2019-09-24 | 2021-12-28 | 杰克缝纫机股份有限公司 | Sewing machine |
| CN213925309U (en) * | 2020-10-06 | 2021-08-10 | 浙江杜马缝纫机股份有限公司 | Backstitch and forward sewing adjusting device and sewing machine |
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- 2021-10-23 CN CN202111236716.8A patent/CN113957620B/en active Active
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