CN219637465U - Cloth feeding driving mechanism of sewing machine - Google Patents
Cloth feeding driving mechanism of sewing machine Download PDFInfo
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- CN219637465U CN219637465U CN202320597736.6U CN202320597736U CN219637465U CN 219637465 U CN219637465 U CN 219637465U CN 202320597736 U CN202320597736 U CN 202320597736U CN 219637465 U CN219637465 U CN 219637465U
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- 239000004744 fabric Substances 0.000 title claims abstract description 190
- 238000009958 sewing Methods 0.000 title claims abstract description 75
- 230000007246 mechanism Effects 0.000 title claims abstract description 54
- 238000005520 cutting process Methods 0.000 claims abstract description 89
- 230000009471 action Effects 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims description 56
- 230000005540 biological transmission Effects 0.000 claims description 17
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000003993 interaction Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of sewing machines, and particularly provides a cloth feeding driving mechanism of a sewing machine. According to the utility model, the cloth feeding action of the cloth feeding teeth is realized through the combined driving of the cloth feeding driving motor and the lifting tooth driving motor, the automatic thread cutting and the automatic lifting of the presser foot can be realized by the cloth feeding driving motor and the lifting tooth driving motor, the motion track of the cloth feeding teeth is regulated through the man-machine interaction interface of the control system, the control and synchronous control of the cloth feeding teeth track can be completely realized without mechanical tools, the high-efficiency sewing of various common materials and special processes can be realized through the built-in program of the control system, the problem of the sewing performance debugging which can be finished by professional maintenance and debugging personnel in the past is solved, the operation is convenient, the use difficulty of the sewing machine is reduced, the multifunctional utilization of the motor is realized, the utilization efficiency of the motor is improved, the installation quantity of the whole machine motor is reduced, and the production benefit is improved.
Description
Technical Field
The utility model belongs to the technical field of sewing machines, and particularly provides a cloth feeding driving mechanism of a sewing machine.
Background
The feed dog of the sewing machine is one of core components for realizing sewing, the eccentric wheel is arranged on the main shaft in the prior art, the feed dog is realized by utilizing the eccentric link mechanism, the feed dog track is ensured by the machining precision due to the adoption of mechanical rigid transmission, and the feed dog track is unstable and can not be adjusted or is difficult to adjust due to the unstable machining precision of parts in actual production, so that the sewing performance of the sewing machine is limited; when the physical properties (composition, thickness and elasticity) of the sewing material are changed, the feed dog track and the synchronization of the feed dog and the needle are required to be adjusted by a mechanical tool and a professional maintenance personnel, and particularly, higher requirements are put on the operation of the feed dog.
The utility model patent with publication number of CN211947480U provides a feeding device and a sewing machine with the feeding device. It is noted that the feeding device is used for carrying the material on the sewing machine, and the feeding device includes: a feeding motor having an output shaft; the cloth feeding teeth are used for conveying materials; the transmission assembly is arranged between the feeding motor and the feed dog so as to transmit the power output by the feeding motor to the feed dog; the transmission assembly includes: the horizontal conveying shaft is connected with the first end of the feed dog so as to enable the feed dog to move along the horizontal direction under the drive of the horizontal conveying shaft; the transmission connecting rod is connected with the output shaft and the horizontal conveying shaft so that a preset included angle alpha is formed between the output shaft and the horizontal conveying shaft. However, in a high-speed sewing state, because of insufficient response efficiency of the motor, it is difficult to realize a specific and efficient control of the feed dog trajectory of the motor, and in actual operation, the feed dog of the sewing machine may take a motion of pushing against the presser foot, and the sewing effect of the sewing machine needs to be further improved.
Similar to the above patent, a special motor is generally used to drive the feed dog, and other sewing actions such as thread cutting or presser foot lifting actions are also used. In addition, the limit on the structural design of the sewing machine cannot realize the multipurpose of the motor, and an additional motor or an electromagnet is needed to realize automatic thread cutting and automatic presser foot lifting, so that the utilization rate of the motor is low, and a plurality of motors are operated to simultaneously ensure that a plurality of people are needed for assembly, and the requirement on the skill of an assembler is high. The manufacturing cost of the sewing machine is also increased.
Disclosure of Invention
The utility model particularly provides a cloth feeding driving mechanism of a sewing machine, aiming at the technical problems, the cloth feeding driving mechanism is provided with a cloth feeding driving motor and a cloth feeding shaft, and is characterized by also comprising a cloth feeding driving assembly, wherein the cloth feeding driving assembly is positioned at the front end of the cloth feeding driving motor and is provided with a cloth feeding driving motor, a first cloth feeding crank, a long cloth feeding swinging connecting rod, a cloth feeding conversion crank, a short cloth feeding swinging connecting rod, a second cloth feeding crank, a cloth feeding conversion crank pin, a cloth feeding shaft and a tooth frame assembly; the cloth feeding crank II is fixed on the cloth feeding shaft; the other end of the cloth feeding shaft is fixed with a tooth rack component; the second limiter is used for abutting against the cloth feeding conversion crank and is an elastomer; when the cloth feeding driving motor is operated to a state that a second connecting shaft hinged between the long cloth feeding swinging connecting rod and the cloth feeding conversion crank and a rotating shaft of the cloth feeding driving motor form a coaxial state, a swinging source output by the cloth feeding driving motor is not transmitted to the short cloth feeding swinging connecting rod any more.
The other scheme of the protection is that the device is also provided with a lifting tooth driving assembly, wherein the lifting tooth driving assembly is provided with a lifting tooth driving motor, a lifting tooth crank I, a long lifting tooth swinging connecting rod, a lifting tooth conversion crank, a short lifting tooth swinging connecting rod, a lifting tooth crank II, a lifting tooth shaft and a cloth feeding tooth assembly; a feed dog assembly is arranged at the other end of the feed dog lifting shaft; the device is also provided with a first limiter, wherein the first limiter is used for propping against the lifting tooth conversion crank and is an elastomer; when the lifting tooth driving motor runs to a state that a first connecting shaft hinged between the long lifting tooth swinging connecting rod and the lifting tooth conversion crank and a rotating shaft of the lifting tooth driving motor form a coaxial state, a swinging source output by the lifting tooth driving motor is not transmitted to the short lifting tooth swinging connecting rod.
Further, the cloth feeding conversion crank is provided with a positioning joint, and the positioning joint is sleeved on the cloth feeding conversion crank pin.
Further, the sewing machine is also provided with a cloth feeding driving assembly cover cap which covers the whole cloth feeding driving assembly and is fixed on the cloth feeding driving motor.
Further, the lifting tooth conversion crank is provided with a positioning part, and the positioning part is sleeved on the lifting tooth conversion crank pin.
Further, the sewing machine is also provided with a lifting tooth driving assembly cover 16, the lifting tooth driving assembly is covered by the lifting tooth driving assembly cover to serve as a protective cover, the lifting tooth driving assembly cover is fixed on the lifting tooth driving motor, and the lifting tooth driving assembly is positioned at the front end of the lifting tooth driving motor.
Further, the lifting tooth driving motor and the cloth feeding driving motor are fixed on the sewing machine base, and a motor operation area in which the lifting tooth driving motor and the cloth feeding driving motor indirectly drive the cloth feeding teeth is a cloth feeding tooth operation area; the motor operation area of the lifting tooth driving motor is also provided with a presser foot lifting operation area; the motor operation area of the cloth feeding driving motor is also provided with a thread cutting operation area.
Further, the sewing machine is also provided with a thread cutting mechanism, the thread cutting mechanism comprises a round pushing piece, a thread cutting fork crank, a thread cutting transmission shaft and a thread cutting executing part, the thread feeding driving motor is operated to enable a second connecting shaft hinged between the long thread feeding swinging connecting rod and the thread feeding conversion crank to form a coaxial state with the rotating shaft of the thread feeding driving motor, then the thread feeding driving motor enters a presser foot lifting operation area immediately, the thread feeding driving motor is driven to enable the round pushing piece fixed on the thread feeding crank I to enter the direction of the thread cutting fork crank to operate, the thread cutting fork crank is fixed at the front end of the thread cutting transmission shaft, the thread cutting executing part is positioned at the rear end of the thread cutting transmission shaft, and the round pushing piece is positioned outside a fork opening of the thread cutting fork crank when the thread feeding driving motor executes a thread feeding action; when the cloth feeding driving motor performs the thread cutting action, the round pushing piece enters the fork opening of the thread cutting fork-shaped crank, and after thread cutting is completed, the round pushing piece leaves the fork opening of the thread cutting fork-shaped crank.
Further, the sewing machine is also provided with a presser foot lifting mechanism, the presser foot lifting mechanism is provided with a presser foot lifting cam, a presser foot lifting lever support, a presser foot lifting ejector rod and a presser foot lifting rear end executing part, the presser foot lifting cam is fixed on a rotating shaft of a presser foot lifting driving motor, which extends out of the rear end of the presser foot lifting driving motor, the presser foot lifting lever is hinged on the presser foot lifting lever support, one end of the presser foot lifting lever support acts on the presser foot lifting cam, the other end of the presser foot lifting lever acts on the presser foot lifting ejector rod, the presser foot lifting cam is provided with an idle constant diameter surface 411 and a lifting surface 412, and the presser foot lifting lever support is fixed on a sewing machine body.
Further, the thread lifting driving motor executes thread cutting action of the thread cutting mechanism, and the cloth feeding driving motor executes presser foot lifting action of the presser foot lifting mechanism.
According to the utility model, the cloth feeding action of the cloth feeding teeth is realized through the combined driving of the cloth feeding driving motor and the feed lifting driving motor, the automatic thread cutting and the automatic feed lifting of the presser foot can be realized by the cloth feeding driving motor and the feed lifting driving motor, the motion trail of the cloth feeding teeth is regulated through the man-machine interaction interface of the control system, the control and the synchronous control of the cloth feeding teeth can be completely realized without mechanical tools, the high-efficiency sewing of various common materials and special processes can be realized through the built-in program of the control system, the problem of debugging of sewing performance which can be finished by professional maintenance and debugging personnel in the past is solved, the operation is convenient, and the use difficulty of the sewing machine is reduced. Meanwhile, the utility model realizes the multifunctional utilization of the motor, improves the utilization efficiency of the motor, reduces the installation quantity of the motor of the whole machine and improves the production benefit. In the production of the sewing machine, the integrated design scheme is adopted to realize large-assembly mode production, so that the number of assembled parts is greatly reduced, and the number of assembly people is reduced under the same production number, thereby having higher technical value and application prospect.
Drawings
FIG. 1 is a schematic view of a sewing machine according to the present utility model;
FIG. 2 is a schematic view of a feed dog drive mechanism for a sewing machine according to the present utility model;
FIG. 3 is a schematic view of the structure of the cover cap of the feed drive assembly and the cover cap of the feed drive assembly of the sewing machine according to the present utility model;
FIG. 4 is a schematic view of a lift-feed drive assembly of a sewing machine according to the present utility model;
FIG. 5 is a schematic view of a feed drive assembly and a thread cutting drive mechanism of a sewing machine according to the present utility model;
FIG. 6 is a schematic view of a presser foot lifting mechanism of a sewing machine according to the present utility model.
The numerical numbers in the above figures refer to the components as follows:
the lifting tooth driving motor 11, the lifting tooth driving motor rotating shaft 111, the lifting tooth driving assembly 12, the lifting tooth crank one 121, the long lifting tooth swinging connecting rod 122, the lifting tooth converting crank 123, the positioning part 1231, the short lifting tooth swinging connecting rod 124, the lifting tooth crank two 125, the lifting tooth converting crank pin 126, the lifting tooth shaft 13, the lifting tooth crank three 14, the lifting tooth connecting rod 15 and the lifting tooth driving assembly cover 16; a first limiter 17; a first connecting shaft 18;
a feed drive motor 21, a feed drive motor shaft 211, a feed drive assembly 22, a feed crank one 221, a long feed swing link 222, a feed conversion crank 223, a positioning section 2231, a short feed swing link 224, a feed crank two 225, a circular pusher 226, a feed conversion crank pin 227, a feed shaft 23, a feed shoe 24, a feed shoe 25, a feed shoe 26, a feed drive assembly cover 27; a second limiter 28; a second connecting shaft 29;
a thread cutting fork crank 31, a fork opening 311, a thread cutting transmission shaft 32, a thread cutting executing part 33;
the presser foot lifting cam 41, the idle constant diameter surface 411, the lifting surface 412, the presser foot lifting lever 42, the presser foot lifting lever bracket 43 and the presser foot lifting push rod 44.
Detailed Description
The following two preferred embodiments of the present utility model will be described in detail with reference to fig. 1 to 6 so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, and thus the scope of the present utility model is more clearly and clearly defined, and these embodiments are only for illustrating the present utility model and not for limiting the same.
Referring to the above drawings, the present utility model provides a feed driving mechanism of a sewing machine, which has a feed driving motor 11, a feed driving assembly 12, a feed shaft 13, a feed crank III 14, a feed connecting rod 15, and a feed driving motor 21, a feed driving assembly 22, a feed shaft 23, a feed seat 24, a feed rack 25, a feed rack 26, etc., wherein the feed crank III 14, the feed connecting rod 15, the feed seat 24, the feed rack 25, and the feed rack are grouped into a rack assembly; the feed dog driving motor 11 drives the feed dog 26 of the feed dog driving assembly to reciprocate in the feed dog lifting direction, and the feed dog driving motor 21 drives the feed dog driving assembly to reciprocate in the feed dog 26 feed direction, in other words, the feed dog driving motor 11 provides feed action in the front-rear direction for the feed dog 26; the feed drive motor 21 provides a feed motion in the lifting direction for the feed dog 26, the feed dog drive mechanism is cooperatively driven by the feed dog drive motor 11 and the feed drive motor 21, and the feed sewing motion of the feed dog drive mechanism is indirectly realized through interaction of a plurality of parts.
The sewing machine also has control system, thread cutting mechanism and presser foot lifting mechanism, etc., the control system controls the driving of the feed driving mechanism, thread cutting mechanism and presser foot lifting mechanism, the utility model lifts the feed driving motor 11 and has and can realize lifting the presser foot of the presser foot mechanism and lifting the presser foot, the feed driving motor 21 has and can realize the thread cutting action of the thread cutting mechanism. The motor operation area of the feed dog 26 indirectly driven by the feed dog driving motor 11 and the feed dog driving motor 21 is a feed dog operation area; the motor operation area of the lifting tooth driving motor 11 is also provided with a presser foot lifting operation area; the motor operation area of the cloth feed driving motor 21 also has a thread cutting operation area.
In the feed dog driving mechanism, a feed dog driving motor 11 and a feed dog driving motor 21 are fixed to a sewing machine base. The feed lifting driving motor 11 is indirectly connected with the feed lifting shaft 13, and the feed conveying driving motor 21 is indirectly connected with the feed conveying shaft 23. Under the driving of the feed dog driving motor 11 and the feed dog driving motor 21, the feed dog driving motor 11 drives the feed dog driving assembly 12, the feed dog driving motor 21 drives the feed dog driving assembly 22, and the feed dog driving motor 11 and the feed dog driving motor 21 transmit feed actions to the feed dog 26 in a reciprocating operation mode in a feed dog operation area, so that the feed action output of the combination of the up-down feed and the front-back feed of the feed dog 26 is realized.
The lifting tooth driving assembly 12 is positioned at the front end of the lifting tooth driving motor 11. The lifter driving unit 12 includes a lifter driving motor 11, a lifter crank one 121, a long lifter swing link 122, a lifter switching crank 123, a short lifter swing link 124, a lifter crank two 125, a lifter switching crank pin 126, and the like. The first lifting tooth crank 121 is fixed on the lifting tooth driving motor rotating shaft 111 of the lifting tooth driving motor 11, the first lifting tooth crank 121 is hinged with the long lifting tooth swinging connecting rod 122, the long lifting tooth swinging connecting rod 122 is hinged with the lifting tooth converting crank 123, the lifting tooth converting crank 123 is hinged with the short lifting tooth swinging connecting rod 124, the short lifting tooth swinging connecting rod 124 is hinged with the second lifting tooth crank 125, and the second lifting tooth crank 125 is fixed on the lifting tooth shaft 13; the other end of the lifting tooth shaft 13 is fixed with a lifting tooth crank III 14, the lifting tooth crank III 14 is hinged with a lifting tooth connecting rod 15, the lifting tooth connecting rod 15 is movably connected in a feed tooth frame 25, and a feed tooth 26 is fixed on the feed tooth frame 25. Or a rack component is fixed at the other end of the lifting shaft 13, and comprises a lifting crank III 14, a lifting connecting rod 15, a feeding rack 25, a feeding rack 26 and the like. The lifting-tooth converting crank 123 has a positioning portion 1231, and the positioning portion 1231 is sleeved on the lifting-tooth converting crank pin 126, so that the lifting-tooth converting crank 123 using the lifting-tooth converting crank pin 126 as a rotation positioning shaft can be driven to rotate by the long lifting-tooth swinging connecting rod 122.
Under the instruction of the control system, the feed lifting driving motor 11 is driven in a reciprocating operation mode at a certain angle in the feed feeding operation area, and a swinging source output by the feed lifting driving motor 11 is transmitted to the feed lifting connecting rod 15 through the feed lifting crank I121, the long feed lifting swinging connecting rod 122, the feed lifting conversion crank 123, the short feed lifting swinging connecting rod 124 and the feed lifting crank II 125, and finally is transmitted to the feed feeding frame 25 through the feed lifting crank III 14 on the feed lifting shaft 13.
The sewing machine is also provided with a lifting tooth driving assembly cover cap 16, the lifting tooth driving assembly 12 is covered by the lifting tooth driving assembly cover cap 16 to serve as a protective cover, the lifting tooth driving assembly cover cap 16 is fixed on the lifting tooth driving motor 11, and the lifting tooth driving assembly cover cap 16 plays a role in dust prevention and oil stain prevention.
The cloth feed driving assembly 22 is located at the front end of the cloth feed driving motor 21. The feed drive unit 22 includes a feed drive motor 21, a first feed crank 221, a long feed swing link 222, a feed conversion crank 223, a short feed swing link 224, a second feed crank 225, a circular pusher 226, a feed conversion crank pin 227, a feed shaft 23, a feed shoe 24, a feed shoe 25, a feed shoe 26, and the like. The first cloth feeding crank 221 is fixed on a cloth feeding driving motor rotating shaft 211 which is output by the power of the cloth feeding driving motor 21, the first cloth feeding crank 221 is hinged with a long cloth feeding swinging connecting rod 222, the long cloth feeding swinging connecting rod 222 is hinged with a cloth feeding conversion crank 223, the cloth feeding conversion crank 223 is hinged with a short cloth feeding swinging connecting rod 224, and the short cloth feeding swinging connecting rod 224 is hinged with a second cloth feeding crank 225; the second cloth feeding crank 225 is fixed on the cloth feeding shaft 23; the other end of the cloth feeding shaft 23 is fixed with a cloth feeding tooth seat 24, the cloth feeding tooth seat 24 is hinged with a cloth feeding tooth frame 25, and a cloth feeding tooth 26 is fixed on the cloth feeding tooth frame 25. Alternatively, a rack assembly including a feed dog 24, a feed dog 25, a feed dog 26, and the like is fixed to the other end of the feed shaft 23. The feed conversion crank 223 has a positioning section 2231, and the positioning section 2231 is sleeved on the feed conversion crank pin 227, and the feed conversion crank 223 and the positioning section 2231 are rotatable on the feed conversion crank pin 227.
Under the instruction of the control system, the cloth feed driving motor 21 is driven in a reciprocating manner in the cloth feed operation region, and the swinging source output by the cloth feed driving motor 21 finally reaches the cloth feed teeth 26 through the first cloth feed crank 221, the long cloth feed swinging connecting rod 222, the cloth feed conversion crank 223, the short cloth feed swinging connecting rod 224, the second cloth feed crank 225, the cloth feed shaft 23, the cloth feed tooth seat 24 and the cloth feed tooth frame 25.
The sewing machine further has a feed drive assembly cover 27, the feed drive assembly cover 27 covers the entire feed drive assembly 22, and the feed drive assembly cover 27 is fixed to the feed drive motor 21 so that the inter-hinged parts therein are protected from dust and oil.
The above-described feed dog driving motor 11 and feed dog driving motor 21 operate the output swing source in a reciprocating manner at the same time, so that the feed dog 26 can perform the feed function of sewing. The system control efficiency of the sewing machine can be effectively improved by adopting the lifting-tooth driving motor 11 and the cloth feeding driving motor 21, the manual operation of the original sewing machine by means of mechanical needle pitch adjustment is eliminated, the control, in particular the control of the needle pitch, is finer and more accurate, and the high-requirement sewing requirement can be met.
Under the control of the control system, when the lifting tooth driving motor 11 runs to a state that a first connecting shaft 18 hinged between the long lifting tooth swinging connecting rod 122 and the lifting tooth converting crank 123 and the lifting tooth driving motor rotating shaft 111 form a coaxial state, the swinging source output by the lifting tooth driving motor 11 is not transmitted to the short lifting tooth swinging connecting rod 124 any more; when the cloth feed driving motor 21 is operated to make the second connecting shaft 29 hinged between the long cloth feed swinging connecting rod 222 and the cloth feed conversion crank 223 and the cloth feed driving motor rotating shaft 211 form a coaxial state, the swinging source output by the cloth feed driving motor 21 is not transmitted to the short cloth feed swinging connecting rod 224 any more, and the sewing machine finishes the cloth feed action on the cloth feed teeth 26 at the moment.
The sewing machine of the utility model also has a first limiter 17 and a second limiter 28, wherein the first limiter 17 is fixed on the lifting-tooth driving assembly cover 16, and the second limiter 28 is fixed on the cloth feeding driving assembly cover 27. The first limiter 17 is used for abutting against the lifting tooth conversion crank 123; the second limiter 28 is used for abutting against the cloth feeding conversion crank 223, and the first limiter 17 and the second limiter 28 are both elastic bodies.
When the feed lifting driving motor 11 is about to break away from the feed feeding tooth operation area and enter the presser foot operation area to operate, at this time, the feed lifting conversion crank 123 is located at a position where the swing amplitude is close to the limit position, the outer side surface of the feed lifting conversion crank 123 abuts against the first limiter 17, the first limiter 17 provides a reverse thrust for the feed lifting conversion crank 123, the thrust enables the hinged connecting shaft 18 between the long feed lifting swing connecting rod 122 and the feed lifting conversion crank 123 and the feed lifting driving motor rotating shaft 111 to form a trend of breaking away from a coaxial state, and finally an included angle is formed between the long feed lifting swing connecting rod 122 and the feed lifting conversion crank 123. The included angle is such that after the presser foot lifting action is completed by the lifter driving motor 11, the lifter driving motor 11 can smoothly push the lifter switching crank 123 back to the cloth tooth operating region, because the lifter driving motor 11 cannot push the lifter switching crank 123 under the condition that the hinged connecting shaft 18 between the long lifter swinging connecting rod 122 and the lifter switching crank 123 is coaxial with the lifter driving motor rotating shaft 111.
Similarly, when the feed drive motor 21 is separated from the feed dog operation area and enters the thread cutting operation area for operation, the feed conversion crank 223 is positioned at the position where the swing amplitude is close to the limit, the outer side surface of the feed conversion crank 223 abuts against the second limiter 28, and the second limiter 28 provides a reverse thrust force for the feed conversion crank 223. When the cloth feeding driving motor 21 enters the cutting operation region, the thrust force makes the second connecting shaft 29 hinged between the long cloth feeding swinging connecting rod 222 and the cloth feeding conversion crank 223 form a trend of being out of the coaxial state with the rotating shaft 211 of the cloth feeding driving motor, and finally an included angle is formed between the long cloth feeding swinging connecting rod 222 and the cloth feeding conversion crank 223. This angle facilitates the feed drive motor 21 to smoothly push the feed conversion crank 223 to return to the feed dog operation area after performing the thread cutting operation because the feed drive motor 21 cannot push the feed conversion crank 223 in a state that the second connecting shaft 29 hinged between the long feed swing link 222 and the feed conversion crank 223 is kept coaxial with the feed drive motor rotation shaft 211.
Next, the sewing machine needs to perform a thread cutting operation of the thread cutting mechanism and a presser foot lifting operation of the presser foot lifting mechanism.
The specific scheme of the wire cutting action is as follows: the thread cutting mechanism includes a circular pushing member 226, a thread cutting fork crank 31, a thread cutting transmission shaft 32, a thread cutting executing part 33, and the like. After the two connecting shafts 29 hinged between the long cloth swinging connecting rod 222 and the cloth transferring crank 223 and the cloth transferring driving motor shaft 211 form a coaxial state, the cloth transferring driving motor 21 enters the presser foot lifting operation area immediately, the cloth transferring driving motor 21 drives the round pushing piece 226 fixed on the first cloth transferring crank 221 to enter the direction of the cutting fork crank 31 to operate, the cutting fork crank 31 is fixed at the front end of the cutting transmission shaft 32, the cutting executing part 33 is positioned at the rear end of the cutting transmission shaft 32, the cloth transferring driving motor 21 continues to rotate so that the cutting transmission shaft 32 also rotates, and the cutting transmission shaft 32 pushes the cutting executing part 33, so that the cutting executing part 33 executes the cutting action. In summary, the cloth feed drive motor 21 performs a thread cutting operation in the thread cutting operation region using a circular pushing member 226 mounted on the cloth feed crank one 221.
After the thread cutting is completed, the cloth feed driving motor 21 is reversely operated again, so that the thread cutting fork crank 31 and the thread cutting transmission shaft 32 are rotated to the original positions, and the thread cutting executing part 33 ends the thread cutting operation. When the cloth feed driving motor 21 performs the cloth feed action, the circular pushing piece 226 is positioned outside the fork opening 311 of the wire cutting fork crank 31; when the cloth feed driving motor 21 performs the thread cutting operation, the circular pushing member 226 enters the fork opening 311 of the thread cutting fork crank 31, and after the thread cutting is completed, the circular pushing member 226 leaves the fork opening 311 of the thread cutting fork crank 31. When the feed drive motor 21 performs the feed operation and the thread cutting operation before, the sewing operation between the feed dog drive mechanism and the thread cutting mechanism does not interfere with each other. In addition, the cloth feeding driving motor 21 can not only perform cloth feeding action but also perform thread cutting action, so that the service efficiency of the motor is effectively improved, and the production cost of the sewing machine is greatly reduced.
The lift-feed drive motor 11 performs a lift-feed operation in the thread cutting operation region by using a lift-feed cam 41 fixed to the rear-end lift-feed drive motor shaft 111. When the presser foot lifting action is implemented at the lowest point position of the feed dog 26, the presser foot lifting action is implemented by the aid of the presser foot lifting driving motor 11, after the presser foot lifting driving motor 11 leaves a feed dog operation area, the presser foot lifting action is implemented only after the presser foot lifting driving motor 11 leaves the angle and does not push the conversion crank 223 and parts below the conversion crank, namely, the presser foot lifting action is not implemented under the action of pushing the feed dog 26, and therefore the sewing machine has a sewing structure of a feed driving assembly 22, which is stable and reliable in sewing, stability in operation of the sewing machine is greatly improved, and sewing quality is improved.
The presser foot lifting mechanism comprises a presser foot lifting cam 41, a presser foot lifting lever 42, a presser foot lifting lever bracket 43, a presser foot lifting push rod 44, a presser foot lifting rear end executing part and the like. The presser foot lifting cam 41 is fixed on the presser foot lifting driving motor rotating shaft 111 extending out of the rear end of the presser foot lifting driving motor 11, so that the service efficiency of the motor is improved; the presser foot lifting lever 42 is hinged on a presser foot lifting lever bracket 43, one end of the presser foot lifting lever bracket 43 acts on a presser foot lifting cam 41, the other end of the presser foot lifting lever 42 acts on a presser foot lifting push rod 44, and the presser foot lifting cam 41 is provided with an idle constant diameter surface 411 and a lifting surface 412. The presser foot lifting lever bracket 43 is fixed to the sewing machine body.
When the presser foot is lifted, when the lifter driving motor 11 runs to make the first connecting shaft 18 hinged between the long lifter swinging connecting rod 122 and the lifter switching crank 123 and the lifter driving motor rotating shaft 111 be in a coaxial state, the lifter driving motor 11 immediately leaves the cloth feed operating area to enter the presser foot lifting operating area, the lifting surface 412 of the presser foot lifting cam 41 is driven to press down the presser foot lifting lever 42, the other end of the pressed presser foot lifting lever 42 is lifted, so that the presser foot lifting ejector rod 44 is lifted, and the presser foot lifting ejector rod 44 on the upper side pushes the presser foot rear end executing part to complete the presser foot lifting action. After the presser foot lifting operation is completed, the presser foot lifting drive motor 11 is reversed again, the lifting surface 412 gradually separates from the presser foot lifting lever 42, and the presser foot lifting lever 42 is contacted by the idle constant diameter surface 411. When the feed operation is performed by the feed-up driving motor 11, the idle constant diameter surface 411 contacts the feed-up presser foot lever 42, and the idle constant diameter surface 411 is disposed concentrically with the feed-up driving motor shaft 111, so that the feed-up driving motor 11 does not push the feed-up presser foot lever 42 through the idle constant diameter surface 411 during the feed operation, that is, the feed-up driving motor 11 does not interfere with the feed-up presser foot operation during the feed operation.
In addition, as a new implementation proposal, the thread lifting driving motor 11 can execute the thread cutting action of the thread cutting mechanism, the cloth feeding driving motor 21 can execute the foot lifting action of the foot lifting mechanism, and compared with the fact that the thread lifting driving motor 11 executes the foot lifting action of the foot lifting mechanism and the cloth feeding driving motor 21 executes the thread cutting action of the thread cutting mechanism, the thread lifting mechanism is only structurally moved, and the technical effect is the same as the technical effect, and the multifunctional utilization of the motor of the sewing machine is realized.
The foregoing is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, i.e. the equivalent structure or equivalent flow transformation of the shape, structure and principle of the present utility model and the contents of the drawings, or the application of the utility model directly or indirectly to other related technical fields; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are covered by the scope of the patent protection.
Claims (10)
1. The cloth feeding driving mechanism of the sewing machine is provided with a cloth feeding driving motor and a cloth feeding shaft, and is characterized by also comprising a cloth feeding driving assembly, wherein the cloth feeding driving assembly is positioned at the front end of the cloth feeding driving motor, the cloth feeding driving assembly is provided with a cloth feeding driving motor, a first cloth feeding crank, a long cloth feeding swinging connecting rod, a cloth feeding conversion crank, a short cloth feeding swinging connecting rod, a second cloth feeding crank, a cloth feeding conversion crank pin, a cloth feeding shaft and a tooth frame assembly, the first cloth feeding crank is fixed on a rotating shaft of the cloth feeding driving motor which is output by power of the cloth feeding driving motor, the first cloth feeding crank is hinged with the long cloth feeding swinging connecting rod, the long cloth feeding swinging connecting rod is hinged with the cloth feeding conversion crank, the cloth feeding conversion crank is hinged with the short cloth feeding swinging connecting rod, and the short cloth feeding swinging connecting rod is hinged with the second cloth feeding crank; the cloth feeding crank II is fixed on the cloth feeding shaft; the other end of the cloth feeding shaft is fixed with a tooth rack component; the second limiter is used for abutting against the cloth feeding conversion crank and is an elastomer; when the cloth feeding driving motor is operated to a state that a second connecting shaft hinged between the long cloth feeding swinging connecting rod and the cloth feeding conversion crank and a rotating shaft of the cloth feeding driving motor form a coaxial state, a swinging source output by the cloth feeding driving motor is not transmitted to the short cloth feeding swinging connecting rod any more.
2. The cloth feed driving mechanism of the sewing machine according to claim 1, wherein the cloth feed driving mechanism further comprises a lifting tooth driving assembly, the lifting tooth driving assembly comprises a lifting tooth driving motor, a lifting tooth crank I, a long lifting tooth swinging connecting rod, a lifting tooth conversion crank, a short lifting tooth swinging connecting rod, a lifting tooth crank II, a lifting tooth shaft and a tooth frame assembly, the lifting tooth crank I is fixed on a lifting tooth driving motor rotating shaft of the lifting tooth driving motor, the lifting tooth crank I is hinged with the long lifting tooth swinging connecting rod, the long lifting tooth swinging connecting rod is hinged with the lifting tooth conversion crank, the lifting tooth conversion crank is hinged with the short lifting tooth swinging connecting rod, the short lifting tooth swinging connecting rod is hinged with the lifting tooth crank II, and the lifting tooth crank II is fixed on the lifting tooth shaft; a tooth frame component is fixed at the other end of the tooth lifting shaft; the device is also provided with a first limiter, wherein the first limiter is used for propping against the lifting tooth conversion crank and is an elastomer; when the lifting tooth driving motor runs to a state that a first connecting shaft hinged between the long lifting tooth swinging connecting rod and the lifting tooth conversion crank and a rotating shaft of the lifting tooth driving motor form a coaxial state, a swinging source output by the lifting tooth driving motor is not transmitted to the short lifting tooth swinging connecting rod.
3. The cloth feed driving mechanism of a sewing machine according to claim 1, wherein the cloth feed conversion crank has a positioning section, and the positioning section is sleeved on the cloth feed conversion crank pin.
4. The cloth feed driving mechanism of a sewing machine of claim 1, further comprising a cloth feed driving assembly cover covering the entire cloth feed driving assembly, the cloth feed driving assembly cover being secured to the cloth feed driving motor.
5. The cloth feed driving mechanism of a sewing machine according to claim 2, wherein the feed-up switching crank has a positioning portion, and the positioning portion is sleeved on the feed-up switching crank pin.
6. The cloth feed driving mechanism of a sewing machine according to claim 2, further comprising a feed lifting driving assembly cover, wherein the feed lifting driving assembly is covered by the feed lifting driving assembly cover as a protective cover, the feed lifting driving assembly cover is fixed on the feed lifting driving motor, and the feed lifting driving assembly is positioned at the front end of the feed lifting driving motor.
7. The cloth feed driving mechanism of a sewing machine according to claim 2, wherein the feed dog driving motor and the cloth feed driving motor are fixed on a sewing machine base, and a motor operation area in which the feed dog driving motor and the cloth feed driving motor indirectly drive the feed dog is a feed dog operation area; the motor operation area of the lifting tooth driving motor is also provided with a presser foot lifting operation area; the motor operation area of the cloth feeding driving motor is also provided with a thread cutting operation area.
8. The cloth feed driving mechanism of a sewing machine according to claim 1 or 2, wherein the sewing machine is further provided with a thread cutting mechanism, the thread cutting mechanism comprises a circular pushing member, a thread cutting fork crank, a thread cutting transmission shaft and a thread cutting executing part, the cloth feed driving motor is operated to enable a second connecting shaft hinged between the long cloth feed swinging connecting rod and the cloth feed conversion crank to form a coaxial state with a rotating shaft of the cloth feed driving motor, then the cloth feed driving motor enters a presser foot lifting operation area, the cloth feed driving motor is driven to enable the circular pushing member fixed on the first cloth feed crank to enter a direction of the thread cutting fork crank to operate, the thread cutting fork crank is fixed at the front end of the thread cutting transmission shaft, the thread cutting executing part is positioned at the rear end of the thread cutting transmission shaft, and the circular pushing member is positioned outside a fork opening of the thread cutting fork crank when the cloth feed driving motor executes a cloth feed action; when the cloth feeding driving motor performs the thread cutting action, the round pushing piece enters the fork opening of the thread cutting fork-shaped crank, and after thread cutting is completed, the round pushing piece leaves the fork opening of the thread cutting fork-shaped crank.
9. The cloth feed driving mechanism of a sewing machine according to claim 1 or 2, further comprising a presser foot lifting mechanism having a presser foot lifting cam, a presser foot lifting lever bracket, a presser foot lifting ram and a presser foot lifting rear end executing portion, wherein the presser foot lifting cam is fixed on a presser foot lifting driving motor shaft extending from the rear end of the presser foot lifting driving motor, the presser foot lifting lever is hinged on the presser foot lifting lever bracket, one end of the presser foot lifting lever bracket acts on the presser foot lifting cam, the other end of the presser foot lifting lever acts on the presser foot lifting ram, the presser foot lifting cam has an idle constant diameter surface and a lifting surface, and the presser foot lifting lever bracket is fixed on a sewing machine body.
10. The cloth feed driving mechanism of a sewing machine according to claim 2, wherein the feed-up driving motor performs a thread cutting operation of the thread cutting mechanism, and the feed-up driving motor performs a presser foot lifting operation of the presser foot lifting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320597736.6U CN219637465U (en) | 2023-03-23 | 2023-03-23 | Cloth feeding driving mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320597736.6U CN219637465U (en) | 2023-03-23 | 2023-03-23 | Cloth feeding driving mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219637465U true CN219637465U (en) | 2023-09-05 |
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ID=87815961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320597736.6U Active CN219637465U (en) | 2023-03-23 | 2023-03-23 | Cloth feeding driving mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219637465U (en) |
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2023
- 2023-03-23 CN CN202320597736.6U patent/CN219637465U/en active Active
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