CN210122619U

CN210122619U - Feed dog driving mechanism of sewing machine

Info

Publication number: CN210122619U
Application number: CN201920704557.1U
Authority: CN
Inventors: 吴善敏; 应振华; 林晓晓
Original assignee: Jack Sewing Machine Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-03-03
Anticipated expiration: 2029-05-16

Abstract

The utility model provides a feeding tooth actuating mechanism of sewing machine belongs to sewing equipment technical field. It has solved the poor technical problem of scheduling of current pay-off tooth actuating mechanism adjustability. The sewing machine comprises a tooth frame, a feeding tooth fixedly arranged on the tooth frame and a tooth lifting structure capable of driving the tooth frame to move up and down, the feeding tooth driving mechanism comprises a feeding motor, a feeding crank, a tooth frame seat and a feeding shaft with an eccentric part, the tooth frame seat is sleeved on the eccentric part of the feeding shaft, and the feeding shaft is connected with an adjusting and fixing screw; an output shaft of the feeding motor is fixedly connected with one end of a feeding crank, and the other end of the feeding crank is connected with one side of the tooth rack seat and can drive the tooth rack seat to swing; the other side of the tooth frame seat is provided with a tooth frame pin, and one end of the tooth frame is sleeved on the tooth frame pin. The feeding tooth driving mechanism can conveniently adjust the position of the feeding tooth according to the requirement.

Description

Feed dog driving mechanism of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine design, a feeding tooth actuating mechanism of sewing machine is related to.

Background

The cloth feeding motion of a sewing machine is realized through the motion of feeding teeth in the existing sewing industry, the motion of the feeding teeth is usually realized through a feeding mechanism and a tooth lifting mechanism, the feeding mechanism and the tooth lifting mechanism are driven by the same driving source in the prior art, so that the tooth lifting and the feeding are realized, for example, the feeding mechanism and the tooth lifting mechanism of a flat sewing machine are driven by an upper shaft, the upper shaft is driven to move through a main shaft motor, a tooth lifting feeding eccentric wheel is installed on the upper shaft, a feeding connecting rod is hinged to one end of the eccentric wheel, a tooth lifting connecting rod is hinged to the other end of the eccentric wheel, the feeding connecting rod and the tooth lifting connecting rod are driven to move through the rotation of the upper shaft, then a feeding shaft and a tooth lifting shaft are respectively driven to rotate, finally, the rotation of the feeding shaft is converted into the front-rear motion of the feeding teeth.

Chinese patent (publication No. CN105442195B, published as 2018-11-23) discloses a sewing machine, which comprises a cloth feeding motor, wherein an output shaft of the cloth feeding motor is connected with a feeding shaft through a connecting rod mechanism, the cloth feeding motor drives the feeding shaft to rotate through the connecting rod mechanism, a tooth frame seat is further arranged on the feeding shaft, the tooth frame seat is hinged with one end of a tooth frame, the other end of the tooth frame is connected with a tooth lifting fork-shaped crank, the tooth lifting fork-shaped crank is arranged on the tooth lifting shaft, the positive rotation and the negative rotation of the cloth feeding motor drive the tooth frame seat to move so as to drive the tooth frame to move back and forth, a tooth lifting rear crank is further arranged on the tooth lifting shaft, the tooth lifting rear crank is connected with an eccentric wheel through a tooth lifting connecting rod, the eccentric wheel is arranged on an upper shaft, the upper shaft is driven by an upper shaft motor to rotate so as to drive the eccentric wheel to move so as to drive the tooth lifting rear crank to swing up and down, thereby realizing the up-and-down movement of the dental articulator.

In the patent document, the cloth feeding motor drives the feeding shaft to rotate through the first connecting rod, the second connecting rod, the third connecting rod and the swing rod, and then drives the tooth frame to move through the feeding shaft, the distance between the output shaft of the cloth feeding motor and the tooth frame is far, and the power transmission between the output shaft of the cloth feeding motor and the tooth frame can generate deviation and shaking; meanwhile, the tooth frame is inconvenient to adjust, so that the position of the feed dog cannot be conveniently adjusted according to the requirement.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a sewing machine's pay-off tooth actuating mechanism, the utility model aims to solve the technical problem that: how to improve the adjustability and controllability of the feeding tooth in the sewing machine.

The purpose of the utility model can be realized by the following technical proposal:

a sewing machine feed dog driving mechanism comprises a feed dog frame, feed dogs fixedly arranged on the feed dog frame and a feed lifting dog structure capable of driving the feed dog frame to move up and down, and is characterized in that the feed dog driving mechanism comprises a feed motor, a feed crank, a feed dog frame seat and a feed shaft with an eccentric part, wherein the feed dog frame seat is sleeved on the eccentric part of the feed shaft, and the feed shaft is connected with an adjusting and fixing screw; an output shaft of the feeding motor is fixedly connected with one end of the feeding crank, and the other end of the feeding crank is connected with one side of the tooth frame seat and can drive the tooth frame seat to swing; the other side of the tooth frame seat is provided with a tooth frame pin, and one end of the tooth frame is sleeved on the tooth frame pin.

The principle is as follows: the feeding teeth are fixedly arranged on the tooth frame through feeding tooth screws, and the feeding teeth and the tooth frame are lifted through the tooth lifting structure to realize tooth lifting action; the feeding action is controlled by a feeding motor, an output shaft of the feeding motor drives a feeding crank to swing, and the feeding crank drives a tooth rack seat to swing. The tooth frame seat pushes the tooth frame to move back and forth, so that the feeding tooth moves back and forth. According to the technical scheme, the forward and backward movement of the feeding tooth is controlled through the feeding motor, the action of the feed lifting tooth is controlled through the rotation of the upper shaft, the feeding and feed lifting tooth functions are mutually independent, and the feeding motor is controlled through the controller of the sewing machine, so that wider and more sewing performances and patterns can be realized. Simultaneously the tooth frame seat is installed on the eccentric part of pay-off axle, through unscrewing adjusting set screw, during rotatory pay-off axle, can adjust the position of eccentric part to make the position of tooth frame seat change, realize that the position of pay-off tooth changes, adjust the fixed pay-off axle of adjusting set screw through screwing up after finishing adjusting. The customer adjusts the feeding pressure position according to the change of sewing fabrics to ensure that the sewing performance is better, and in addition, when the customer changes the teeth and the needle plate of the feeding teeth, the position of the feeding teeth is adjusted to ensure that the relative positions of the feeding teeth and the needle plate are better in matching, and the sewing effect is better.

In the feed dog driving mechanism of the sewing machine, the middle part of the feed dog seat is a cylinder body with a through hole, the eccentric part of the feed shaft is inserted into the through hole, one end of the feed shaft is provided with a stop head, the other end of the feed shaft is sleeved with a rear sleeve and a check ring, and two ends of the through hole on the feed shaft, which are positioned on the feed dog seat, are also sleeved with plane bearings.

In foretell sewing machine's pay-off tooth actuating mechanism, the both ends of dental articulator seat all have to the connecting portion that extend with one side, the both ends of dental articulator round pin are connected respectively on the connecting portion, the tip cover of dental articulator is established on the dental articulator round pin and is located between two connecting portions, be equipped with on the dental articulator seat and lock the locking screw of dental articulator round pin. The positions of the tooth frame and the feeding teeth can be properly adjusted by loosening the locking screw.

In the feed dog driving mechanism of the sewing machine, one end of the feed crank is fixedly connected with the output shaft of the feed motor, the other end of the feed crank extends along the radial direction of the output shaft of the feed motor, the end of the feed crank is connected with the crank pin, the crank pin is connected with the feed connecting rod, and the feed connecting rod is hinged with the end part of the tooth frame seat. Furthermore, the end part of the tooth frame seat is provided with a protruding part, a connecting rod pin is connected onto the protruding part, and the feeding connecting rod is rotatably connected with the connecting rod pin through a bearing between the crank pin and the feeding connecting rod.

In the above structure, as an alternative, one or both of the connecting rod pin or the crank pin is/are changed into a pin with an eccentric structure, for example, the crank pin has an eccentric structure at one end, and is fixed at the other end by a screw, and the eccentric end is hinged with the feeding connecting rod by the bearing, and when the screw is loosened, the tooth position change is realized by rotating the crank pin on the feeding crank.

In the feed dog driving mechanism of the sewing machine, the sewing machine comprises an upper shaft, the feed dog structure comprises an eccentric wheel arranged on the upper shaft and a feed dog crank capable of driving the feed dog frame to lift, and the eccentric wheel is connected with the feed dog crank through a pressure lifting connecting rod and a pressure lifting shaft.

The sewing machine also comprises a needle plate, the needle plate is arranged on the machine head of the sewing machine, and the feeding teeth are fixedly arranged on the tooth frame through feeding tooth screws; the upper shaft is connected with an upper shaft motor, the upper shaft motor drives the upper shaft to rotate, the eccentric wheel moves along with the rotation of the upper shaft, the feed lifting connecting rod is hinged with the eccentric part on the eccentric wheel, the feed lifting connecting rod converts the movement of the feed lifting connecting rod into the rotation of the feed lifting shaft through a swinging part, and the feed lifting crank is fixed on the feed lifting shaft and moves along with the rotation of the feed lifting shaft; and then the feed lifting crank drives the feed lifting rack to lift, so that feed lifting action is realized.

In the feed dog driving mechanism of the sewing machine, a swinging piece is fixedly arranged on the feed shaft, and the outer end of the swinging piece is hinged with the lower end of the pressure lifting connecting rod; the upper end of the pressure lifting connecting rod is connected with the eccentric position of the eccentric wheel; the feed shaft is arranged on the feed shaft, the feed shaft is arranged on the feed shaft. The sliding column is hinged with the end part of the tooth rack and can rotate relatively, and the sliding column is arranged in the opening of the feed lifting crank and can move relatively along with the opening. When the feed lifting shaft drives the feed lifting crank to swing up and down, the feed lifting shaft drives the feed lifting rack to move up and down through the sliding column, and feed lifting action is realized.

Compared with the prior art, the utility model provides a pay-off tooth actuating mechanism has following advantage:

1. the utility model discloses the back-and-forth movement of well pay-off tooth is controlled through the pay-off motor, and the action of lifting teeth is controlled by the upper shaft rotation, and pay-off and lifting teeth function mutual independence are controlled the pay-off motor through sewing machine's controller, can realize wider, more sewing performance and style.

2. The utility model discloses well dental articulator seat is installed on the eccentric portion of pay-off axle, through unscrewing adjusting fixing screw, during rotatory pay-off axle, can adjust the position of eccentric portion to make the position of dental articulator seat change, realize that the position of pay-off tooth changes, adjusts the fixed pay-off axle of back through screwing up adjusting fixing screw after finishing. The customer adjusts the feeding pressure position according to the change of sewing fabrics to ensure that the sewing performance is better, and in addition, when the customer changes the teeth and the needle plate of the feeding teeth, the position of the feeding teeth is adjusted to ensure that the relative positions of the feeding teeth and the needle plate are better in matching, and the sewing effect is better.

Drawings

Fig. 1 is a schematic perspective view of the feed dog driving mechanism.

Fig. 2 is a partial structure schematic diagram of the feed dog driving mechanism.

Fig. 3 is a schematic view of a partial explosion structure of the feed dog driving mechanism.

In the figure, 1, an upper shaft; 2. an eccentric wheel; 3. a feed lifting connecting rod; 4. a swinging member; 5. a feed lifting shaft; 6. a needle plate; 7. mounting screws; 8. feeding teeth; 9. a traveler; 10. a feed lifting crank; 10a, an opening; 12. a dental articulator; 13. a dental articulator pin; 14. a retainer ring; 15. a flat bearing; 16. a dental articulator mount; 16a, a through hole; 16b, a connecting part; 17. locking the screw; 18. a feed shaft; 18a, an eccentric portion; 18b, a stop; 19. adjusting the fixing screw; 20. a link pin; 21. a bearing; 22. a feeding connecting rod; 23. a feeding crank; 24. a crank pin; 25. a feeding motor; 26. and (4) a rear sleeve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, the sewing machine comprises an upper shaft 1, a needle plate 6 and a pressure lifting structure, wherein the needle plate 6 is arranged on a machine head of the sewing machine, a tooth holder 12 is arranged below the needle plate 6, a feeding tooth 8 is fixedly arranged on the tooth holder 12 through a mounting screw 7, the pressure lifting structure comprises an eccentric wheel 2 arranged on the upper shaft 1 and a tooth lifting crank 10 capable of driving the tooth holder 12 to lift, the feeding tooth driving mechanism comprises a feeding motor 25, a tooth holder base 16 and a feeding shaft 18 with a section of eccentric part 18a, the eccentric wheel 2 is connected with the tooth lifting crank 10 through a pressure lifting connecting rod 3 and a pressure lifting shaft 5, the tooth holder base 16 is sleeved on the eccentric part 18a of the feeding shaft 18, and the feeding shaft 18 is connected with an adjusting and fixing screw 19; an output shaft of the feeding motor 25 is fixedly arranged at one end of a feeding crank 23, and the other end of the feeding crank 23 is connected with one side of the tooth rack base 16 and can drive the tooth rack base 16 to swing; a tooth rack pin 13 is arranged on the other side of the tooth rack seat 16, and one end of the tooth rack 12 is sleeved on the tooth rack pin 13; specifically, the feeding shaft 18 is fixedly provided with a swinging piece 4, and the outer end of the swinging piece 4 is hinged with the lower end of the pressure lifting connecting rod 3; the upper end of the pressure lifting connecting rod 3 is connected with the eccentric position of the eccentric wheel 2; the feed shaft 18 is sleeved with the feed lifting crank 10 and is circumferentially and fixedly connected with the feed shaft 18, a U-shaped opening 10a is formed in the outer end of the feed lifting crank 10, a sliding column 9 is arranged at the other end of the tooth frame 12, and the sliding column 9 is embedded in the opening 10a in a sliding mode.

Further, as shown in fig. 3, the middle of the dental articulator holder 16 is a cylinder with a through hole 16a, the eccentric part 18a of the feeding shaft 18 is inserted into the through hole 16a, one end of the feeding shaft 18 is provided with a stopper 18b, the other end of the feeding shaft 18 is sleeved with a rear sleeve 26 and a retainer ring 14, and two ends of the feeding shaft 18, which are positioned at the through hole 16a of the dental articulator holder 16, are also sleeved with a plane bearing 15; the two ends of the tooth frame base 16 are respectively provided with a connecting part 16b extending towards the same side, the two ends of the tooth frame pin 13 are respectively connected to the connecting parts 16b, the end part of the tooth frame 12 is sleeved on the tooth frame pin 13 and is positioned between the two connecting parts 16b, and the tooth frame base 16 is provided with a locking screw 17 capable of locking the tooth frame pin 13; one end of the feeding crank 23 is fixedly connected with an output shaft of the feeding motor 25, the other end of the feeding crank 23 extends along the radial direction of the output shaft of the feeding motor 25 and is connected with a crank pin 24, a feeding connecting rod 22 is connected to the crank pin 24, a protruding portion is arranged at the end portion of the tooth frame base 16 and is connected with a connecting rod pin 20, and the crank pin 24 is rotatably connected with the feeding connecting rod 22 and the feeding connecting rod 22 through a bearing 21.

When the lifting die is in work, the upper shaft motor drives the upper shaft 1 to rotate, the eccentric wheel 2 rotates along with the upper shaft 1 to move, the lifting tooth connecting rod 3 is hinged with the eccentric part 18a on the eccentric wheel 2, the lifting tooth connecting rod 3 converts the movement of the lifting tooth connecting rod 3 into the rotation of the lifting tooth shaft 5 through the swinging piece 4, and the lifting tooth crank 10 is fixed on the lifting tooth shaft 5 and moves along with the rotation of the lifting tooth shaft 5; then the feed lifting crank 10 drives the feed lifting rack 12 to lift, so as to realize feed lifting action. On the other hand, the feeding action is controlled by the feeding motor 25, the output shaft of the feeding motor 25 drives the feeding crank 23 to swing, and the feeding crank 23 drives the tooth frame base 16 to swing. The tooth frame base 16 pushes the tooth frame 12 to move back and forth, so that the feeding tooth 8 moves back and forth. In the technical scheme, the forward and backward movement of the feeding tooth 8 is controlled by the feeding motor 25, the tooth lifting action is controlled by the rotation of the upper shaft 1, the feeding and tooth lifting functions are mutually independent, and the feeding motor 25 is controlled by the controller of the sewing machine, so that wider and more sewing performances and patterns can be realized. Meanwhile, the tooth frame seat 16 is arranged on the eccentric part 18a of the feeding shaft 18, the adjusting and fixing screw 19 is unscrewed, and when the feeding shaft 18 is rotated, the position of the eccentric part 18a can be adjusted, so that the position of the tooth frame seat 16 is changed, the position of the feeding tooth 8 is changed, and the feeding shaft 18 is fixed by screwing the adjusting and fixing screw 19 after the adjustment is finished. The customer adjusts the feeding pressure position according to the change of sewing fabrics to ensure that the sewing performance is better, and in addition, when the customer changes the teeth of the feeding teeth 8 and the needle plate 6, the position of the feeding teeth 8 is adjusted to ensure that the relative positions of the feeding teeth 8 and the needle plate 6 are better matched, and the sewing effect is better.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the 1, upper axis is used more herein; 2. an eccentric wheel; 3. a feed lifting connecting rod; 4. a swinging member; 5. a feed lifting shaft; 6. a needle plate; 7. mounting screws; 8. feeding teeth; 9. a traveler; 10. a feed lifting crank; 10a, an opening; 12. a dental articulator; 13. a dental articulator pin; 14. a retainer ring; 15. a flat bearing; 16. a dental articulator mount; 16a, a through hole; 16b, a connecting part; 17. locking the screw; 18. a feed shaft; 18a, an eccentric portion; 18b, a stop; 19. adjusting the fixing screw; 20. a link pin; 21. a bearing; 22. a feeding connecting rod; 23. a feeding crank; 24. a crank pin; 25. a feeding motor; 26. back cover, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A feeding tooth driving mechanism of a sewing machine comprises a tooth frame (12), feeding teeth (8) fixedly arranged on the tooth frame (12) and a tooth lifting structure capable of driving the tooth frame (12) to move up and down, and is characterized in that the feeding tooth driving mechanism comprises a feeding motor (25), a feeding crank (23), a tooth frame seat (16) and a feeding shaft (18) with a section of eccentric part (18a), the tooth frame seat (16) is sleeved on the eccentric part (18a) of the feeding shaft (18), and the feeding shaft (18) is connected with an adjusting fixing screw (19); an output shaft of the feeding motor (25) is fixedly connected with one end of the feeding crank (23), and the other end of the feeding crank (23) is connected with one side of the tooth frame seat (16) and can drive the tooth frame seat (16) to swing; a tooth rack pin (13) is arranged on the other side of the tooth rack seat (16), and one end of the tooth rack (12) is sleeved on the tooth rack pin (13).

2. The feed dog driving mechanism of the sewing machine according to claim 1, wherein the middle of the feed dog seat (16) is a cylinder body with a through hole (16a), the eccentric part (18a) of the feed shaft (18) is inserted into the through hole (16a), one end of the feed shaft (18) is provided with a stopper (18b), the other end of the feed shaft (18) is sleeved with a rear sleeve (26) and a retainer ring (14), and two ends of the feed shaft (18) positioned in the through hole (16a) of the feed dog seat (16) are also sleeved with plane bearings (15).

3. The feed dog driving mechanism of the sewing machine according to claim 2, wherein both ends of the dog frame base (16) are provided with connecting portions (16b) extending to the same side, both ends of the dog frame pin (13) are respectively connected to the connecting portions (16b), the end portion of the dog frame (12) is sleeved on the dog frame pin (13) and located between the two connecting portions (16b), and a locking screw (17) capable of locking the dog frame pin (13) is arranged on the dog frame base (16).

4. The feed dog driving mechanism of the sewing machine according to claim 1, 2 or 3, wherein one end of the feed crank (23) is fixedly connected with the output shaft of the feed motor (25), the other end of the feed crank (23) extends along the radial direction of the output shaft of the feed motor (25) and is connected with a crank pin (24), the crank pin (24) is connected with a feed connecting rod (22), and the feed connecting rod (22) is hinged with the end of the rack base (16).

5. The feed dog driving mechanism of the sewing machine according to claim 1, 2 or 3, characterized in that the sewing machine comprises an upper shaft (1), the feed dog structure comprises an eccentric wheel (2) arranged on the upper shaft (1) and a feed dog crank (10) capable of driving the feed dog rack (12) to ascend and descend, and the eccentric wheel (2) is connected with the feed dog crank (10) through a pressure-lifting connecting rod (3) and a pressure-lifting shaft (5).

6. The feed dog driving mechanism of the sewing machine according to claim 5, wherein a swing member (4) is fixedly arranged on the feed shaft (18), and the outer end of the swing member (4) is hinged with the lower end of the pressure lifting connecting rod (3); the upper end of the pressure lifting connecting rod (3) is connected with the eccentric position of the eccentric wheel (2); the feed lifting mechanism is characterized in that the feed lifting crank (10) is sleeved at the end of the feed shaft (18) and is fixedly connected with the feed shaft (18) in the circumferential direction, a U-shaped opening (10a) is formed in the outer end of the feed lifting crank (10), a sliding column (9) is arranged at the other end of the tooth frame (12), and the sliding column (9) is embedded in the opening (10a) in a sliding manner.