CN109457401B - Sewing machine and reverse feeding adjusting device thereof - Google Patents
Sewing machine and reverse feeding adjusting device thereof Download PDFInfo
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- CN109457401B CN109457401B CN201910037679.4A CN201910037679A CN109457401B CN 109457401 B CN109457401 B CN 109457401B CN 201910037679 A CN201910037679 A CN 201910037679A CN 109457401 B CN109457401 B CN 109457401B
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- feeding
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- eccentric wheel
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/10—Work-feeding means with rotary circular feed members
- D05B27/18—Feed cups
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Abstract
The invention discloses a sewing machine and a reverse feeding adjusting device thereof, wherein the adjusting device comprises: the inverted feeding shaft is connected with the long swinging connecting rod in a transmission way, and the long swinging connecting rod can swing to drive the inverted feeding shaft to rotate; the reverse feeding eccentric wheel is provided with a limiting hole, the limiting hole is sleeved on the reverse feeding shaft in a hollow mode, the limiting hole is a strip-shaped hole capable of limiting the linear motion of the reverse feeding eccentric wheel relative to the reverse feeding shaft, and two ends of the limiting hole can be respectively in line contact or surface contact limiting with the reverse feeding shaft; the inverted feeding shaft crank is used for enabling the inverted feeding eccentric wheel and the inverted feeding shaft to synchronously rotate; the driving piece is used for driving the reverse feeding eccentric wheel to move so as to change the radial relative position of the limiting hole and the reverse feeding shaft, and the reverse feeding eccentric wheel can drive the feeding shaft to rotate. Because the collision between the limiting hole and the reverse feeding shaft is line contact or surface contact during switching, compared with the point contact collision between a feeding regulator and an adjusting stud in the prior art, the noise and the abrasion generated in the backstitch process can be reduced.
Description
Technical Field
The invention relates to the technical field of sewing equipment, in particular to a reverse feeding adjusting device. In addition, the invention also relates to a sewing machine comprising the reverse feeding adjusting device.
Background
In the existing feed adjusting mechanism of the flat sewing machine, as shown in fig. 1 to 3, an upper shaft 05 and a feed eccentric wheel 06 rotate to drive a feed connecting rod 07 to swing, and then a feed crank 010 and a feed shaft 011 swing through the combined action of a swing seat 04, a swing long connecting rod 08 and a swing short connecting rod 09, so that the cloth feeding effect is realized. When reverse feeding is needed, the driving piece pulls the swing seat 04 to change the phase of the swing long connecting rod 08 and the swing short connecting rod 09, so that the reverse motion of the feeding crank 010 and the feeding shaft 011 is realized, and finally the reverse feeding effect is realized. Meanwhile, in the process of realizing reverse feeding, the swinging seat 04 can pull the reverse-sewing connecting rod 03 to move when swinging, so that the feeding regulator 01 and the feeding adjusting stud 02 collide at a point B1, after the reverse feeding action is finished, the swinging seat 04 resets, and the feeding regulator 01 and the feeding adjusting stud 02 collide at a point A1 through the reverse-sewing connecting rod 03.
The feed adjuster 01 and the feed adjusting stud 02 are point contacts, and in the whole backstitch process, as shown in fig. 3, the feed adjuster 01 and the feed adjusting stud 02 generate two times of large noise after colliding with points B1 and A1. Moreover, the feeding regulator 01 and the feeding regulating stud 02 are in a point contact state for a long time, which causes serious abrasion of the feeding regulator 01 and the feeding regulating stud 02, causes abnormal needle pitch and affects sewing effect.
Therefore, how to provide a reverse feeding adjusting device with less noise and less abrasion in the reverse sewing process is a technical problem which needs to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention provides a reverse feeding adjustment device, which has less noise and less wear during the backstitch process. Another object of the present invention is to provide a sewing machine including the above back feed adjusting device, which is less noisy and less worn during the back feed process.
In order to achieve the purpose, the invention provides the following technical scheme:
a reverse feeding adjusting device comprises a long swinging connecting rod and a feeding shaft, and comprises:
the inverted feeding shaft is connected with the long swinging connecting rod in a transmission manner, and the long swinging connecting rod swings to drive the inverted feeding shaft to rotate;
the reverse feeding eccentric wheel is provided with a limiting hole, the limiting hole is sleeved on the reverse feeding shaft in a hollow mode, the limiting hole is a strip-shaped hole capable of limiting the reverse feeding eccentric wheel to move linearly relative to the reverse feeding shaft, and two ends of the limiting hole can be in line contact or surface contact limiting with the reverse feeding shaft respectively;
the inverted feeding shaft crank is used for enabling the inverted feeding eccentric wheel and the inverted feeding shaft to synchronously rotate and is connected between the inverted feeding eccentric wheel and the inverted feeding shaft;
the driving piece is used for driving the reverse feeding eccentric wheel to move so as to change the radial relative position of the limiting hole and the reverse feeding shaft, the reverse feeding eccentric wheel is connected with the feeding shaft in a transmission mode, and the reverse feeding eccentric wheel can drive the feeding shaft to rotate by moving.
Preferably, the method further comprises the following steps:
one end of the reverse feeding connecting rod is rotatably sleeved on the reverse feeding eccentric wheel, and the reverse feeding connecting rod swings along with the eccentric rotation of the reverse feeding eccentric wheel;
and one end of the inverted feeding crank is fixedly connected with the feeding shaft, the other end of the inverted feeding crank is hinged to the inverted feeding connecting rod, and the inverted feeding crank swings along with the swinging of the inverted feeding connecting rod so as to drive the feeding shaft to rotate.
Preferably, the outer circumferential surface of the reverse feeding eccentric wheel comprises a cylindrical surface, one end of the reverse feeding connecting rod is fixedly provided with a connecting ring, and the connecting ring is a circular ring which is rotatably matched with the cylindrical surface in a sleeved mode.
Preferably, the back-feeding eccentric wheel comprises an eccentric wheel body and a positioning rod fixed on the eccentric wheel body, a limiting hole is formed in the eccentric wheel body, the back-feeding connecting rod is sleeved on the eccentric wheel body, a back-feeding shaft crank is fixed on the back-feeding shaft, the positioning rod is in sliding connection with a linear sliding groove in the back-feeding shaft crank, and the extending direction of the linear sliding groove is parallel to the extending direction of the limiting hole so as to limit the driving piece to drive the back-feeding eccentric wheel to the sliding direction of the back-feeding shaft.
Preferably, the driving part comprises a material reversing electromagnet and a connecting rod assembly connected to the output end of the material reversing electromagnet, and a pin shaft is arranged on the connecting rod assembly and connected to the material reversing connecting rod.
Preferably, the driving member further comprises an elastic member connected to the positioning rod;
when the inverted feeding electromagnet is electrified, the connecting rod assembly drives the inverted feeding eccentric wheel to overcome the reset force of the elastic piece to move, so that one end of the limiting hole is in contact with the inverted feeding shaft;
when the inverted feeding electromagnet is powered off, the reset force of the elastic piece drives the inverted feeding eccentric wheel to move, so that the other end of the limiting hole is in contact with the inverted feeding shaft.
Preferably, a connecting hole on the material reversing and feeding connecting rod is sleeved on the pin shaft in an empty mode.
Preferably, the connecting rod assembly comprises a material reversing electromagnet connecting rod, a material reversing electromagnet crank and a material reversing electromagnet pull rod, the material reversing electromagnet connecting rod is fixedly connected to the output end of the material reversing electromagnet, one end of the material reversing electromagnet crank is hinged to the material reversing electromagnet connecting rod, the other end of the material reversing electromagnet crank is hinged to the material reversing electromagnet pull rod, the middle of the material reversing electromagnet crank is rotatably connected to the limiting column, and the pin shaft is arranged on the material reversing electromagnet pull rod.
A sewing machine comprises a reverse feeding adjusting device, wherein the reverse feeding adjusting device is the reverse feeding adjusting device.
According to the inverted feeding adjusting device provided by the invention, in the process of switching feeding and inverted feeding, the position of the inverted feeding eccentric wheel relative to the inverted feeding shaft is adjusted through the driving piece, so that the position of the inverted feeding connecting rod, the position of the inverted feeding crank and the angle of the feeding shaft are changed, switching is realized by adjusting the position of the inverted feeding eccentric wheel relative to the inverted feeding shaft instead of switching through swinging of the swinging seat in the prior art, the long connecting rod does not need to move in the switching process, and the problem that the contact point is switched between the feeding adjuster and the feeding adjusting stud by driving the upper shaft to move through the long connecting rod in the prior art is solved. After the position of the inverted feeding eccentric wheel relative to the inverted feeding shaft is determined, the swinging of the swinging long connecting rod can be transmitted to the inverted feeding shaft, and the rotation of the inverted feeding eccentric wheel can drive the feeding shaft to rotate, so that normal feeding is realized.
Because when switching, the collision between spacing hole and the reverse feeding axle is line contact or surface contact, compare in the point contact collision of the pay-off regulator among the prior art and regulation double-screw bolt with spacing, can greatly reduce the noise that the backstitch in-process produced to improve staff's operational environment, and be favorable to reducing wearing and tearing with increase of service life.
The sewing machine comprising the reverse feeding adjusting device provided by the invention has the advantages of low noise and less abrasion in the reverse sewing process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a first prior art feed adjustment mechanism;
FIG. 2 is a second schematic view of a feed adjustment mechanism of the prior art;
FIG. 3 is a schematic view of a feed adjuster portion of a prior art feed adjustment mechanism;
FIG. 4 is a schematic view of a first construction of the reverse feeding adjustment device of the present invention applied to a sewing machine;
FIG. 5 is a schematic structural diagram of a material discharge adjusting device according to the present invention;
FIG. 6 is a connecting structure diagram of a long swinging connecting rod and a feeding crank in the material reversing and feeding adjusting device provided by the present invention;
FIG. 7 is a diagram of a connection structure of a reverse feeding eccentric wheel and a reverse feeding shaft in the reverse feeding adjustment device provided by the present invention;
FIG. 8 is a diagram of a connection structure of a reverse feeding crank and a reverse feeding eccentric wheel in the reverse feeding adjustment device according to the present invention;
FIG. 9 is a first connecting diagram of a material reversing shaft crank, a material reversing eccentric wheel and a material reversing connecting rod in the material reversing adjustment apparatus according to the present invention;
FIG. 10 is a second connection structure diagram of the material reversing shaft crank, the material reversing eccentric wheel and the material reversing connecting rod in the material reversing adjusting device according to the present invention;
FIG. 11 is a diagram of a connection structure between a material reversing connecting rod and a material reversing crank in the material reversing and feeding adjusting device according to the present invention;
FIG. 12 is a diagram of a connection structure of a material reversing connecting rod, a material reversing crank and a material feeding shaft in the material reversing and feeding adjusting device provided by the present invention;
FIG. 13 is a side view of a reverse feed adjustment mechanism provided in accordance with the present invention;
FIG. 14 is a diagram of the connection structure of the elastic member, the feeding electromagnet and the feeding eccentric wheel in the feeding-backward adjusting device according to the present invention;
FIG. 15 is a connection structure diagram of the elastic member and the material-reversing eccentric wheel in the material-reversing adjusting device according to the present invention.
In fig. 1 to 3:
01-feeding adjuster, 02-feeding adjusting stud, 03-backstitch connecting rod, 04-swinging seat, 05-upper shaft, 06-feeding eccentric wheel, 07-feeding connecting rod, 08-swinging long connecting rod, 09-swinging short connecting rod, 010-feeding crank and 011-feeding shaft;
in fig. 4 to 15:
1-upper shaft, 2-feeding eccentric wheel, 3-feeding connecting rod, 4-swinging seat, 5-swinging short connecting rod, 6-swinging long connecting rod, 7-feeding crank, 8-reverse feeding shaft, 9-reverse feeding shaft crank, 91-linear chute, 10-reverse feeding eccentric wheel, 101-limiting hole, 102-positioning rod, 103-eccentric wheel body, 11-reverse feeding connecting rod, 12-reverse feeding crank, 13-feeding shaft, 14-reverse feeding electromagnet, 15-reverse feeding electromagnet connecting rod, 16-reverse feeding electromagnet crank, 17-reverse feeding electromagnet pull rod, 171-pin shaft and 18-elastic element.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a reverse feeding adjusting device, which has less noise and less abrasion in the backstitch process. The other core of the invention is to provide a sewing machine comprising the reverse feeding adjusting device, which has less noise and less abrasion in the reverse sewing process.
In an embodiment of the reverse feeding adjustment device provided by the present invention, please refer to fig. 4 to fig. 15, which includes a long swing link 6, a feeding shaft 13, a reverse feeding shaft 8, a reverse feeding eccentric wheel 10, a reverse feeding shaft crank 9 and a driving member.
The inverted feeding shaft 8 is connected with the long swinging connecting rod 6 in a transmission way, and the long swinging connecting rod 6 swings to drive the inverted feeding shaft 8 to rotate.
Optionally, the feeding crank 7 is rotatably connected to the long swinging connecting rod 6, the inverted feeding shaft 8 is fixedly connected to the feeding crank 7, the feeding crank 7 swings around the rotation center of the inverted feeding shaft 8 under the driving of the long swinging connecting rod 6, and the inverted feeding shaft 8 is driven to rotate in the swinging process of the feeding crank 7. In the sewing machine, as for the motion of the long swinging connecting rod 6, referring to the prior art, as shown in fig. 6, the long swinging connecting rod 6 is connected to the feeding connecting rod 3, the feeding connecting rod 3 is connected to the upper shaft 1 in a transmission manner, and the long swinging connecting rod 6 can transmit the reciprocating motion of the feeding connecting rod 3 to the feeding crank 7, so that the feeding crank 7 can swing in a reciprocating manner. In addition, the long swing link 6 may be provided in the swing base 4.
Of course, the reverse feeding shaft 8 can also realize transmission connection with the swinging long connecting rod 6 through other connecting rod assemblies.
The reverse feeding eccentric wheel 10 is provided with a limiting hole 101, the limiting hole 101 is sleeved on the reverse feeding shaft 8 in an empty mode, and the relative position of the limiting hole 101 and the reverse feeding shaft 8 is adjustable. Referring to fig. 7, the limiting hole 101 may be a strip-shaped hole capable of limiting the linear motion of the reverse feeding eccentric wheel 10 relative to the reverse feeding shaft 8, and two ends of the limiting hole 101 may be respectively in line contact or surface contact with the reverse feeding shaft 8 for limiting. Preferably, the limiting hole 101 may be a long round hole to further reduce impact damage and noise.
The reverse feeding shaft crank 9 is connected between the reverse feeding eccentric 10 and the reverse feeding shaft 8 so that the reverse feeding eccentric 10 and the reverse feeding shaft 8 rotate synchronously. In the feeding process, the reverse feeding eccentric wheel 10 and the reverse feeding shaft 8 synchronously rotate relative to the rotation center of the reverse feeding shaft 8 through the limiting function of the reverse feeding shaft crank 9.
The driving piece is used for driving the reverse feeding eccentric wheel 10 to move so as to change the radial relative position of the limiting hole 101 and the reverse feeding shaft 8, and therefore switching between feeding and reverse feeding is achieved. The reverse feeding eccentric wheel 10 is connected with the feeding shaft 13 in a transmission mode, and the reverse feeding eccentric wheel 10 can drive the feeding shaft 13 to rotate by moving.
When the feeding process is switched to the reverse feeding process, the driving part drives the reverse feeding eccentric wheel 10 to move, so that the preset reverse feeding position in the limiting hole 101 moves to the reverse feeding shaft 8, and the feeding shaft 13 correspondingly moves to the initial reverse feeding position. After backstitch is finished, when the feeding process is switched by the backstitch process, the driving piece drives the backstitch eccentric wheel 10 to move, so that the preset feeding position in the limiting hole 101 moves to the backstitch shaft 8, and the feeding shaft 13 correspondingly moves to the initial feeding position.
Referring to fig. 7, one end surface of the limiting hole 101 is an a end surface, the other end surface is a B end surface, one of the a end surface and the B end surface is a preset reverse feeding position, and the other is a preset feeding position.
The description will be given by taking the end face A as the preset feeding position and the end face B as the preset reverse feeding position as an example. As shown in fig. 4 and 5, in the feeding process, the reverse feeding eccentric wheel 10 is tangent to the reverse feeding shaft 8 at the end face a, the upper shaft 1 and the feeding eccentric wheel 2 rotate to drive the feeding connecting rod 3 to swing, then the feeding crank 7 swings and drives the reverse feeding shaft 8 to rotate through the combined action of the swinging seat 4, the swinging long connecting rod 6 and the swinging short connecting rod 5, and meanwhile, the reverse feeding shaft crank 9 drives the reverse feeding eccentric wheel 10 to rotate around the axis of the reverse feeding shaft 8, so as to drive the feeding shaft 13 to rotate, thereby realizing the normal feeding function. When the material needs to be reversely fed, the driving piece pushes the material reversing and feeding eccentric wheel 10, so that the material reversing and feeding eccentric wheel 10 is tangent to the material reversing and feeding shaft 8 on the end surface B, and the rotating angle of the feeding shaft 13 is correspondingly adjusted to realize the material reversing and feeding function. After the material reversing and feeding process is finished, the material reversing and feeding eccentric wheel 10 is tangent to the material reversing and feeding shaft 8 on the end surface A.
In the embodiment, in the process of switching feeding and discharging, the position of the discharging eccentric wheel 10 relative to the discharging shaft 8 is adjusted through the driving piece, so that the position of the discharging connecting rod 11, the position of the discharging crank 12 and the angle of the feeding shaft 13 are changed, switching is realized by adjusting the position of the discharging eccentric wheel 10 relative to the discharging shaft 8 instead of switching realized by adjusting the position of the discharging eccentric wheel 10 relative to the discharging shaft 4 in the prior art through swinging of the swinging seat 4, the long connecting rod 6 does not need to move in the switching process, and the problem that the contact point is switched between the feeding adjuster and the feeding adjusting stud by driving the upper shaft to move by swinging the long connecting rod 6 in the prior art does not exist. After the position of the reverse feeding eccentric wheel 10 relative to the reverse feeding shaft 8 is determined, the swinging of the swinging long connecting rod 6 can be transmitted to the reverse feeding shaft 8, and the rotation of the reverse feeding eccentric wheel 10 can drive the feeding shaft 13 to rotate, so that normal feeding is realized.
Because when switching, the collision between spacing hole 101 and the material axle 8 of falling the material is line contact or surface contact, compare in the point contact collision of the pay-off regulator among the prior art and regulation double-screw bolt with spacing, can greatly reduce the noise that produces in the backstitch process to improve staff's operational environment, and be favorable to reducing wearing and tearing with increase of service life.
On the basis of the above embodiment, the material reversing and adjusting device may further include a material reversing connecting rod 11 and a material reversing crank 12. One end of the material reversing and feeding connecting rod 11 is rotatably sleeved on the material reversing and feeding eccentric wheel 10, one end of the material reversing and feeding crank 12 is fixedly connected with the feeding shaft 13, and the other end of the material reversing and feeding crank is hinged on the material reversing and feeding connecting rod 11. The reverse feeding connecting rod 11 swings with the eccentric rotation of the reverse feeding eccentric wheel 10, and the reverse feeding crank 12 swings with the swing of the reverse feeding connecting rod 11, thereby driving the feeding shaft 13 to rotate. Specifically, when one end of the limiting hole 101 contacts with the reverse feeding shaft 8, the reverse feeding eccentric wheel 10 is in an eccentric state relative to the reverse feeding shaft 8, and when the other end of the limiting hole 101 contacts with the reverse feeding shaft 8, the reverse feeding eccentric wheel 10 is also in an eccentric state relative to the reverse feeding shaft 8.
In the feeding process or the reverse feeding process, under the restraint of the feeding shaft 13, the reverse feeding crank 12 and the reverse feeding eccentric wheel 10 and the eccentric driving of the reverse feeding eccentric wheel 10, the reverse feeding connecting rod 11 swings, meanwhile, the reverse feeding crank 12 swings, the reverse feeding crank 12 drives the feeding shaft 13 to rotate, the eccentric motion of the reverse feeding eccentric wheel 10 and the two connecting rods are utilized to realize the transmission between the feeding shaft 13 and the reverse feeding eccentric wheel 10, and the structure is simple.
When the feeding process is switched to the reverse feeding process, the driving piece drives the reverse feeding eccentric wheel 10 to move, so that the preset reverse feeding position in the limiting hole 101 moves to the reverse feeding shaft 8 and is limited by the reverse feeding shaft crank 9. After the switching, the reverse feeding eccentric wheel 10 is in an eccentric state relative to the rotation center of the reverse feeding shaft 8, and the reverse feeding connecting rod 11, the reverse feeding crank 12 and the feeding shaft 13 correspondingly move to the reverse feeding initial position. After the backstitch is finished, when the feeding process is switched by the backstitch process, the driving piece drives the backstitch eccentric wheel 10 to move, so that the preset feeding position in the limiting hole 101 moves to the backstitch shaft 8 and is limited by the backstitch crank 12. After switching, the reverse feeding eccentric wheel 10 is in an eccentric state relative to the rotation center of the reverse feeding shaft 8, and the reverse feeding connecting rod 11, the reverse feeding crank 12 and the feeding shaft 13 correspondingly move to the initial feeding position.
As shown in fig. 4, 5, and 7, the end face a is still taken as the preset feeding position, and the end face B is taken as the preset reverse feeding position. As shown in fig. 4 and 5, in the feeding process, the reverse feeding eccentric wheel 10 is tangent to the reverse feeding shaft 8 at the end face a, the upper shaft 1 and the feeding eccentric wheel 2 rotate to drive the feeding connecting rod 3 to swing, then the feeding crank 7 swings and drives the reverse feeding shaft 8 to rotate through the combined action of the swinging seat 4, the swinging long connecting rod 6 and the swinging short connecting rod 5, meanwhile, the reverse feeding shaft crank 9 drives the reverse feeding eccentric wheel 10 to rotate around the axis of the reverse feeding shaft 8, so as to drive the reverse feeding connecting rod 11 and the reverse feeding crank 12 to swing, and as the reverse feeding crank 12 is fixedly connected with the feeding shaft 13, the reverse feeding crank 12 drives the feeding shaft 13 to rotate, so as to realize the normal feeding function. When the material needs to be reversely fed, the driving piece pushes the material reversing and feeding eccentric wheel 10, so that the material reversing and feeding eccentric wheel 10 is tangent to the material reversing and feeding shaft 8 on the end surface B, and the rotating angle of the feeding shaft 13 is correspondingly adjusted to realize the material reversing and feeding function. After the material reversing and feeding process is finished, the material reversing and feeding eccentric wheel 10 is tangent to the material reversing and feeding shaft 8 on the end surface A.
On the basis of the above embodiment, please refer to fig. 8 and 9, the outer circumferential surface of the material reversing eccentric wheel 10 may include a cylindrical surface, one end of the material reversing connecting rod 11 is fixedly provided with a connecting ring, and the connecting ring is a circular ring rotatably fitted on the cylindrical surface, where the circular ring means that the inner circumferential surface of the connecting ring is a cylindrical surface, and the inner circumferential surface of the circular ring is fitted with the cylindrical surface of the material reversing eccentric wheel 10.
In this embodiment, will send material feeding eccentric wheel 10 and send material feeding connecting rod 11 between through the cooperation of face of cylinder, compare in setting up to irregular shape, can be convenient for process, and send material feeding eccentric wheel 10 and send material feeding shaft 8 long-term work wearing and tearing little, the sewing performance is more stable, can guarantee driven stationarity.
On the basis of the above embodiment, referring to fig. 8, the reverse feeding eccentric wheel 10 may specifically include an eccentric wheel body 103 and a positioning rod 102 fixed to the eccentric wheel body 103, the limiting hole 101 is disposed on the eccentric wheel body 103, the reverse feeding connecting rod 11 is sleeved on the eccentric wheel body 103, and the reverse feeding shaft crank 9 is fixed to the reverse feeding shaft 8. The positioning rod 102 is connected with the linear chute 91 on the reverse feeding shaft crank 9 in a sliding mode, the extending direction of the linear chute 91 is parallel to the extending direction of the limiting hole 101, so that the driving piece is limited to drive the reverse feeding eccentric wheel 10 to slide relative to the reverse feeding shaft 8, at the moment, the reverse feeding shaft crank 9 has a circumferential limiting function and a radial guiding function on the reverse feeding eccentric wheel 10, and the stability of the radial movement of the reverse feeding eccentric wheel 10 can be improved.
On the basis of any of the above embodiments, the driving member may be specifically connected to the material reversing linkage 11. Because the back feeding connecting rod 11 is rotatably sleeved with the back feeding eccentric wheel 10, the back feeding connecting rod 11 is driven to move or translate, and then the back feeding eccentric wheel 10 can be driven to move or translate, so that the relative position of the limiting hole 101 and the back feeding shaft 8 is changed, the connection of the driving piece can be facilitated, and the driving piece does not need to penetrate through the back feeding eccentric wheel 10 and is directly connected to the back feeding shaft 8.
On the basis of the above embodiment, referring to fig. 5 and 13, the driving member may specifically include a material-reversing electromagnet 14 and a connecting rod assembly connected to an output end of the material-reversing electromagnet 14, the connecting rod assembly is provided with a pin 171, and the pin 171 is connected to the material-reversing connecting rod 11. Optionally, when the material reversing electromagnet 14 is powered on, the connecting rod assembly drives the material reversing eccentric wheel 10 to move to the preset material reversing position, and when the material reversing electromagnet 14 is powered off, the connecting rod assembly drives the material reversing eccentric wheel 10 to move to the preset material feeding position. The electromagnet is adopted for control, so that the switching speed can be guaranteed, and the switching timeliness can be guaranteed.
On the basis of the above embodiment, referring to fig. 10, the connecting hole of the material reversing connecting rod 11 is empty-sleeved on the pin 171 of the driving member, and a certain gap is formed between the connecting hole and the pin 171, so that when the material reversing crank 12 swings, the impact between the connecting hole and the pin 171 can be reduced, and the environmental noise can be reduced.
On the basis of the above-mentioned embodiments, as shown in fig. 14 and 15, the driving member may further include an elastic member 18 connected to the positioning rod 102. When the inverted feeding electromagnet 14 is powered on, the connecting rod assembly drives the inverted feeding eccentric wheel 10 to move against the reset force of the elastic piece 18, so that one end of the limiting hole 101 is in contact with the inverted feeding shaft 8. When the backfeeding electromagnet 14 is powered off, the reset force of the elastic part 18 drives the backfeeding eccentric wheel 10 to move, so that the other end of the limiting hole 101 is contacted with the backfeeding shaft 8, and the radial fixation of the backfeeding eccentric wheel 10 is reliably realized by the external driving force of the elastic part 18 or the backfeeding electromagnet 14.
On the basis of the above embodiment, the connecting rod assembly may specifically include a material reversing electromagnet connecting rod 15, a material reversing electromagnet crank 16, and a material reversing electromagnet pull rod 17, where the material reversing electromagnet connecting rod 15 is fixedly connected to the output end of the material reversing electromagnet 14, one end of the material reversing electromagnet crank 16 is hinged to the material reversing electromagnet connecting rod 15, and the other end is hinged to the material reversing electromagnet pull rod 17, the middle part of the material reversing electromagnet crank 16 is rotatably connected to the limiting column, and the pin 171 is disposed on the material reversing electromagnet pull rod 17.
The material reversing electromagnet 14 is started, the material reversing electromagnet connecting rod 15 is pushed or pulled, the material reversing electromagnet crank 16 swings around the limiting column under the driving of the material reversing electromagnet connecting rod 15, the material reversing electromagnet connecting rod 15 swings to drive the material reversing electromagnet pull rod 17 to move, and the material reversing electromagnet pull rod 17 pushes the material reversing eccentric wheel 10 to realize switching.
In this embodiment, the flexibility of the position arrangement between the material reversing electromagnet 14 and the material reversing eccentric wheel 10 can be improved by the arrangement of the connecting rod structure.
Of course, in other embodiments, the positioning rod 102 and the reverse feeding shaft crank 9 may also be engaged by a plug and locked radially by friction. During switching, the driving piece drives the material reversing eccentric wheel 10 to move relative to the material reversing shaft 8, the positioning rod 102 overcomes the friction force between the positioning rod and the material reversing shaft crank 9 to slide relative to the material reversing shaft crank 9, and after the switching is completed, the positioning rod 102 and the material reversing shaft crank 9 are locked through the friction force to keep relatively static.
In addition to the above reverse feeding adjusting device, the present invention further provides a sewing machine, which includes a reverse feeding adjusting device, specifically, the reverse feeding adjusting device provided in any one of the above embodiments, and the above embodiments can be referred to for beneficial effects. The structure of other parts of the sewing machine is referred to the prior art, and the description is omitted.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The sewing machine and the reverse feeding adjusting device thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A material reversing and adjusting device comprises a long swinging connecting rod (6) and a feeding shaft (13), and is characterized by comprising:
the inverted feeding shaft (8) is connected to the long swinging connecting rod (6) in a transmission mode, and the long swinging connecting rod (6) swings to drive the inverted feeding shaft (8) to rotate;
the reverse feeding eccentric wheel (10) is provided with a limiting hole (101), the limiting hole (101) is sleeved on the reverse feeding shaft (8) in a hollow mode, the limiting hole (101) is a strip-shaped hole capable of limiting the reverse feeding eccentric wheel (10) to move linearly relative to the reverse feeding shaft (8), two ends of the limiting hole (101) can be limited through line contact or surface contact with the reverse feeding shaft (8), the reverse feeding eccentric wheel (10) comprises an eccentric wheel body (103) and a positioning rod (102) fixed to the eccentric wheel body (103), and the limiting hole (101) is formed in the eccentric wheel body (103);
the material reversing and feeding shaft crank (9) is used for enabling the material reversing and feeding eccentric wheel (10) and the material reversing and feeding shaft (8) to synchronously rotate and is connected between the material reversing and feeding eccentric wheel (10) and the material reversing and feeding shaft (8), the material reversing and feeding shaft crank (9) is fixed on the material reversing and feeding shaft (8), and the positioning rod (102) is in sliding connection with a linear sliding groove (91) in the material reversing and feeding shaft crank (9);
the driving piece is used for driving the reverse feeding eccentric wheel (10) to move so as to change the radial relative position of the limiting hole (101) and the reverse feeding shaft (8), the reverse feeding eccentric wheel (10) is connected to the feeding shaft (13) in a transmission mode, the reverse feeding eccentric wheel (10) can drive the feeding shaft (13) to rotate in a moving mode, the extending direction of the linear sliding groove (91) is parallel to the extending direction of the limiting hole (101), and therefore the sliding direction of the reverse feeding eccentric wheel (10) relative to the reverse feeding shaft (8) driven by the driving piece is limited.
2. The regulating device of claim 1, further comprising:
the reverse feeding connecting rod (11), one end of the reverse feeding connecting rod (11) is rotatably sleeved on the reverse feeding eccentric wheel (10), and the reverse feeding connecting rod (11) swings along with the eccentric rotation of the reverse feeding eccentric wheel (10);
the automatic feeding device comprises a reverse feeding crank (12), one end of the reverse feeding crank (12) is fixedly connected with a feeding shaft (13), the other end of the reverse feeding crank (12) is hinged to a reverse feeding connecting rod (11), and the reverse feeding crank (12) swings along with the swing of the reverse feeding connecting rod (11) so as to drive the feeding shaft (13) to rotate.
3. The material reversing and feeding adjusting device is characterized in that the outer peripheral surface of the material reversing eccentric wheel (10) comprises a cylindrical surface, and a connecting ring is fixedly arranged at one end of the material reversing connecting rod (11) and is a circular ring which is rotatably matched with the cylindrical surface in a sleeved mode.
4. The backfeeding adjusting device according to claim 2 or 3, characterized in that the backfeeding connecting rod (11) is sleeved on the eccentric wheel body (103).
5. The backfeeding adjusting device according to claim 4, characterized in that the driving member comprises a backfeeding electromagnet (14) and a connecting rod assembly connected to an output end of the backfeeding electromagnet (14), the connecting rod assembly is provided with a pin (171), and the pin (171) is connected to the backfeeding connecting rod (11).
6. The regulating device of claim 5, wherein said driving member further comprises an elastic member (18) connected to said positioning rod (102);
when the inverted feeding electromagnet (14) is electrified, the connecting rod assembly drives the inverted feeding eccentric wheel (10) to overcome the reset force of the elastic piece (18) to move, so that one end of the limiting hole (101) is in contact with the inverted feeding shaft (8);
when the inverted feeding electromagnet (14) is powered off, the reset force of the elastic piece (18) drives the inverted feeding eccentric wheel (10) to move, so that the other end of the limiting hole (101) is in contact with the inverted feeding shaft (8).
7. The inverted feeding adjusting device according to claim 5, wherein the connecting hole of the inverted feeding connecting rod (11) is sleeved on the pin shaft (171).
8. The backfeeding adjusting device according to claim 5, wherein the connecting rod assembly comprises a backfeeding electromagnet connecting rod (15), a backfeeding electromagnet crank (16) and a backfeeding electromagnet pull rod (17), the backfeeding electromagnet connecting rod (15) is fixedly connected to the output end of the backfeeding electromagnet (14), one end of the backfeeding electromagnet crank (16) is hinged to the backfeeding electromagnet connecting rod (15) and the other end is hinged to the backfeeding electromagnet pull rod (17), the middle part of the backfeeding electromagnet crank (16) is rotatably connected to a limiting column, and the pin shaft (171) is arranged on the backfeeding electromagnet pull rod (17).
9. A sewing machine comprising a reverse feed adjustment device, wherein the reverse feed adjustment device is the reverse feed adjustment device of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910037679.4A CN109457401B (en) | 2019-01-15 | 2019-01-15 | Sewing machine and reverse feeding adjusting device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910037679.4A CN109457401B (en) | 2019-01-15 | 2019-01-15 | Sewing machine and reverse feeding adjusting device thereof |
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| Publication Number | Publication Date |
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| CN109457401A CN109457401A (en) | 2019-03-12 |
| CN109457401B true CN109457401B (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910037679.4A Active CN109457401B (en) | 2019-01-15 | 2019-01-15 | Sewing machine and reverse feeding adjusting device thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989184B (en) * | 2019-04-25 | 2021-09-28 | 杰克缝纫机股份有限公司 | Backstitch adjusting mechanism and sewing machine using same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB125070A (en) * | 1918-03-30 | 1920-01-29 | Martin Hemleb | Reversible Feeding Mechanism for Sewing Machines. |
| US3157141A (en) * | 1961-10-09 | 1964-11-17 | Singer Co | Feed adjusting and reversing mechanism for sewing machines |
| US3949691A (en) * | 1975-04-25 | 1976-04-13 | The Singer Company | Automatic back-tack mechanism |
| CN201924162U (en) * | 2010-12-07 | 2011-08-10 | 陈瑞文 | Sewing machine switching control mechanism capable of synchronously controlling rotation directions of feeding wheels and needle feeding direction |
| CN102797119B (en) * | 2012-08-29 | 2014-07-23 | 池州市旭豪机械有限公司 | Forward and reverse feeding device for industrial column type sewing machine |
| CN204959246U (en) * | 2015-09-19 | 2016-01-13 | 浙江中捷缝纫科技有限公司 | Sewing machine's backstitch structure |
| CN207699793U (en) * | 2018-01-05 | 2018-08-07 | 杰克缝纫机股份有限公司 | A kind of gapless drive mechanism of falling feeding automatically |
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Address after: 318000 no.1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |