Feeding device

Abstract

The utility model belongs to the technical field of sewing machines, and discloses a feeding device which comprises a stitch length control motor. One end of the eccentric switching assembly is connected with the output end of the stitch length control motor; one end of the feeding shaft is connected with the eccentric adapter assembly, and the other end of the feeding shaft horizontally extends in the direction away from the stitch length control motor; one end of the tooth frame assembly is connected with the feeding shaft; the feeding shaft rotates to drive the tooth frame assembly to move back and forth; a feed lifting motor; one end of the feed lifting assembly is connected with the output end of the feed lifting motor, and the other end is connected with the feed rack assembly; and the feed lifting assembly moves to adjust the height of the feed rack assembly. A double-stepping-motor driving mode is adopted, one stepping motor drives teeth to move up and down, the other stepping motor controls the stitch length and moves front and back to change the stitch length, feeding tracks are formed, different feeding tracks are achieved through time sequence changes, a complex connecting rod mechanism is changed into a switcher assembly to transmit movement, and the structure of the switcher assembly is simplified. And uniform feeding and high precision are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology, and in particular relates to a feeding device. Background Technology

[0002] Most existing sewing machines use a single motor connected to a complex linkage structure. This complex linkage structure controls the size of the teeth's up-and-down movement and back-and-forth movement. Due to the complexity of the linkage structure, deviations are prone to occur during transmission, resulting in low control accuracy and uneven feeding. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide a feeding device that uses two motors to control the up-and-down movement and back-and-forth movement of the teeth respectively, thereby improving the control accuracy of the feeding device and ensuring uniform feeding.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a feeding device, comprising a needle pitch control motor;

[0005] An eccentric adapter assembly, one end of which is connected to the output of the needle pitch control motor;

[0006] The feeding shaft has one end connected to the eccentric adapter assembly and the other end extending horizontally away from the needle pitch control motor.

[0007] The tooth frame assembly has one end connected to the feed shaft; the rotation of the feed shaft drives the tooth frame assembly to move back and forth.

[0008] Tooth-lifting motor;

[0009] The tooth lifting assembly is connected to the output end of the tooth lifting motor at one end and to the dental frame assembly at the other end; the movement of the tooth lifting assembly adjusts the height of the dental frame assembly.

[0010] According to this utility model, the eccentric adapter assembly includes an eccentric connecting rod with one end connected to the output end of the needle pitch control motor, and a needle pitch switching connector connected to the other end of the eccentric connecting rod. The needle pitch switching connector is connected to a needle pitch switching shaft, which extends horizontally away from the needle pitch control motor. The needle pitch switching shaft is connected to the feeding shaft through a switcher assembly.

[0011] According to this utility model, the tooth frame assembly further includes a tooth frame crank, one end of which is connected to a feed shaft, a tooth frame is connected to the tooth frame crank, and a feed tooth is installed on the tooth frame.

[0012] According to this utility model, the tooth lifting assembly further includes a tooth lifting crank assembly connected to a tooth lifting motor, one end of the tooth lifting shaft is connected to the tooth lifting crank assembly and the other end is connected to the tooth lifting crank, the tooth lifting crank and the tooth lifting fork are hinged, and one end of the tooth lifting fork and the tooth frame is fixed.

[0013] According to this utility model, the feeding shaft, the needle pitch switching shaft, and the tooth lifting shaft are arranged in parallel to each other.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model adopts a dual stepper motor drive method, one stepper motor drives the teeth to move up and down, and the other stepper motor controls the needle pitch and the size of the forward and backward movement to form a feeding trajectory. Different feeding trajectories are achieved by changing the timing. The complex linkage mechanism is replaced by a switcher assembly to transmit motion. The use of the switcher assembly ensures uniform feeding and high precision.

[0015] By individually controlling the tooth-lifting motor to adjust the tooth height, it is possible to sew fabrics of different thicknesses, and it is also convenient to control the sewing machine to sew forward or backward. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of a feeding device according to the present invention;

[0017] Figure 2 This is a second-view structural schematic diagram of a feeding device according to the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one embodiment of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 and 2 As shown, this application provides a feeding device for a sewing machine, including a stitch length control motor 1, an eccentric connecting rod 2 connected to the output shaft of the stitch length control motor 1, a stitch length switching connector 3 connected to the other end of the eccentric connecting rod 2, a stitch length switching shaft 4 connected to the stitch length switching connector 3 and extending away from the stitch length control motor 1, a switcher assembly 5 connected at both ends to the stitch length switching shaft 4 and the feeding shaft 6 respectively, and a feed dog assembly connected to the far end of the feeding shaft 6. The feed dog assembly is connected to a feed dog lifting motor 7 via a feed dog lifting assembly. The rotation of the output shaft of the stitch length control motor 1 drives the eccentric connecting rod 2, the stitch length switching shaft 4, and the feeding shaft 6 in a coordinated manner, causing the feed dog assembly to move back and forth, thereby achieving the position adjustment of the feed dog 12 as detailed below; the rotation of the output shaft of the feed dog lifting motor 7 drives the feed dog lifting assembly connected to it to rotate, thereby causing the height of the feed dog assembly connected to it to change, thereby achieving the height adjustment of the feed dog 12. The switcher assembly 5 is used to control the sewing mode, stitch, and speed, and is an existing structure, which will not be described in detail here.

[0020] Specifically, the tooth holder assembly includes a tooth holder crank 14, one end of which is connected to the feed shaft 6. A tooth holder 13, on which a feed tooth 12 is mounted, is connected to the tooth holder crank 14. The feed tooth 12 is mounted on the tooth holder 13. The tooth holder crank 14 rotates with the feed shaft 6, that is, it rotates clockwise or counterclockwise along the feed shaft 6, thereby driving the tooth holder 13 connected to it to move back and forth, realizing the adjustment of the back and forth position of the feed tooth 12 mounted on the tooth holder 13.

[0021] The lifting tooth assembly includes a lifting tooth crank assembly 8 connected to a lifting tooth motor 7. One end of a lifting tooth shaft 9 is connected to the lifting tooth crank assembly 8, and the other end is connected to a lifting tooth crank 11. The lifting tooth crank 11 and a lifting tooth fork 10 are hinged together. The lifting tooth fork 10 swings circumferentially along the hinge axis. The other end of the lifting tooth fork 10 is fixed to one end of a tooth holder 13, and a feed tooth 12 is fixed on the tooth holder 13. The lifting tooth shaft 9 is parallel to the feed shaft 6. The lifting tooth fork 10 is used to adjust the lifting range of the feed tooth 12 during sewing. When the feed shaft 6 rotates, the tooth holder 13 moves back and forth, simultaneously causing the lifting tooth fork 10 connected to it to swing. The rotation of the lifting tooth shaft 9, through the lifting tooth crank 11, causes the lifting tooth fork 10, which is hinged to it, to swing, changing the height of the lifting tooth fork 10 from the fabric, thus adjusting the height of the feed tooth 12.

[0022] Specifically, the output shaft of the needle pitch control motor 1 is connected to the eccentric connecting rod 2, the eccentric connecting rod 2 is hinged to the needle pitch switching joint 3, one end of the needle pitch switching shaft 4 is connected to the switcher assembly 5 and the other end is connected to the needle pitch switching joint 3, one end of the feeding shaft 6 is connected to the switcher assembly 5 and the other end is connected to the tooth frame crank 14, the tooth frame crank 14 is connected to one end of the tooth frame 13, and the feeding tooth 12 is fixed on the tooth frame 13.

[0023] During the feeding process, the needle pitch control motor 1 drives the eccentric connecting rod 2 to rotate, the eccentric connecting rod 2 drives the needle pitch switching joint 3 to rotate, the needle pitch switching joint 3 drives the switcher assembly 5 to rotate through the needle pitch switching shaft 4, the switcher assembly 5 drives the tooth frame crank 14 to rotate through the feeding shaft 6, the tooth frame crank 14 drives the feeding tooth 12 on the tooth frame 13 to rotate, and adjusts the forward and backward movement of the feeding tooth 12.

[0024] During the tooth lifting motion, the tooth lifting motor 7 drives the tooth lifting crank assembly 8, which in turn drives the tooth lifting crank 11 via the tooth lifting shaft 9. The tooth lifting crank 11 drives the tooth lifting fork 10, which in turn drives the feeding tooth 12 on the tooth frame 13. The feeding tooth 12 moves up and down through the motor output.

[0025] The motor reverses to enable the sewing machine to perform reverse sewing.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding device, characterized in that, include, Pitch control motor; An eccentric adapter assembly, one end of which is connected to the output of the needle pitch control motor; The feeding shaft has one end connected to the eccentric adapter assembly and the other end extending horizontally away from the needle pitch control motor. The tooth frame assembly has one end connected to the feed shaft; the rotation of the feed shaft drives the tooth frame assembly to move back and forth. Tooth-lifting motor; The tooth lifting assembly is connected to the output end of the tooth lifting motor at one end and to the dental frame assembly at the other end; the movement of the tooth lifting assembly adjusts the height of the dental frame assembly.

2. The feeding device as described in claim 1, characterized in that, The eccentric adapter assembly includes an eccentric connecting rod with one end connected to the output end of the needle pitch control motor, and a needle pitch switching connector connected to the other end of the eccentric connecting rod. The needle pitch switching connector is connected to a needle pitch switching shaft, which extends horizontally away from the needle pitch control motor. The needle pitch switching shaft is connected to the feeding shaft through a switcher assembly.

3. A feeding device as described in claim 1 or 2, characterized in that, The tooth frame assembly includes a tooth frame crank, one end of which is connected to a feed shaft, a tooth frame is connected to the tooth frame crank, and a feed tooth is installed on the tooth frame.

4. A feeding device as described in claim 3, characterized in that, The tooth lifting assembly includes a tooth lifting crank assembly connected to a tooth lifting motor, a tooth lifting shaft connected at one end to the tooth lifting crank assembly and at the other end to a tooth lifting crank, a tooth lifting crank and a tooth lifting fork hinged together, and a tooth lifting fork and a tooth frame fixed at one end.

5. A feeding device as described in claim 4, characterized in that, The feeding shaft, the needle pitch switching shaft, and the tooth lifting shaft are arranged in parallel to each other.

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