Multi-axis driving structure for sewing machine and sewing machine adopting the same

Abstract

The utility model discloses a kind of multi-shaft drive structure for sewing machine, including needle bar driving device, lift tooth driving device, cloth feeding driving device, rotating shuttle driving device, needle bar assembly, tooth frame assembly, rotating shuttle;Needle bar driving device includes needle bar shaft, needle bar motor, lift tooth driving device includes lift tooth shaft, lift tooth motor, lift tooth transmission assembly, cloth feeding driving device includes cloth feeding shaft, cloth feeding motor, cloth feeding transmission assembly, lift tooth shaft, cloth feeding shaft are respectively connected with tooth frame assembly rotation, lift tooth shaft, cloth feeding shaft both linkage drive tooth frame assembly work;Rotating shuttle driving device includes gear box, rotating shuttle shaft, rotating shuttle motor.The application also discloses a kind of sewing machine.The application is simple in structure, respectively using independent motor drive, respectively control needle bar, cloth feeding / lift tooth action and rotating shuttle movement, replace traditional mechanical transmission structure, simplify mechanical complexity, reduce noise vibration, improve control precision, satisfy different sewing demand.

Description

Technical Field

[0001] This utility model relates to the field of automated sewing equipment technology, specifically to a multi-axis drive structure for a sewing machine and a sewing machine using the structure. Background Technology

[0002] There are many types of sewing machines, including flatbed sewing machines, overlock sewing machines, chain stitch sewing machines, and coverstitch sewing machines. Currently, flatbed sewing machines are the most widely used. However, traditional flatbed sewing machines typically use a single needle bar motor to drive the feed shaft, feed shaft, and lower shaft via connecting rods and gears. This results in a complex structure and relatively high noise and vibration during operation. Therefore, improvements are being made to address these existing problems. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art and to provide a multi-axis drive structure for a sewing machine and a sewing machine using the structure.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A multi-axis drive structure for a sewing machine includes a needle bar drive device, a dog lifting drive device, a fabric feeding drive device, a rotary hook drive device, a needle bar assembly connected to the needle bar drive device, a dog holder assembly connected to the dog lifting drive device and the fabric feeding drive device respectively, and a rotary hook connected to the rotary hook drive device.

[0006] The needle bar drive device includes a needle bar shaft and a needle bar motor. The needle bar motor drives the needle bar assembly to move up and down through the needle bar shaft.

[0007] The tooth lifting drive device includes a tooth lifting shaft, a tooth lifting motor, and a tooth lifting transmission assembly. The tooth lifting motor drives the tooth lifting shaft to move through the tooth lifting transmission assembly. The fabric feeding drive device includes a fabric feeding shaft, a fabric feeding motor, and a fabric feeding transmission assembly. The fabric feeding motor drives the fabric feeding shaft to move through the fabric feeding transmission assembly. The tooth lifting shaft and the fabric feeding shaft are rotatably connected to the dental frame assembly, and the tooth lifting shaft and the fabric feeding shaft work together to drive the dental frame assembly.

[0008] The shuttle drive device includes a gearbox, a shuttle shaft, and a shuttle motor. The shuttle motor drives the shuttle shaft through the gearbox, thereby driving the shuttle to move.

[0009] In the above-mentioned multi-axis drive structure for a sewing machine, the lifting tooth transmission assembly and the feeding transmission assembly are composed of the same parts, namely the first connecting rod, the second connecting rod, and the third connecting rod. The lifting tooth transmission assembly and the feeding transmission assembly respectively convert the rotational motion of the lifting tooth motor and the feeding motor into the lifting tooth shaft and the feeding shaft swinging back and forth around their own axes, thereby driving the tooth holder assembly to move up and down reciprocally.

[0010] In the above-mentioned multi-axis drive structure for a sewing machine, the output shafts of the lifting tooth motor and the feeding motor are fixed to the first connecting rod by screws, and the output shafts of the two motors can rotate from 0° to 180°.

[0011] In the above-mentioned multi-axis drive structure for a sewing machine, the third connecting rod corresponding to the lifting tooth shaft and the feeding shaft is provided with an opening groove, and the opening groove on the third connecting rod is adjustablely fastened to the lifting tooth shaft and the feeding shaft by screws.

[0012] In the aforementioned multi-axis drive structure for a sewing machine, the gearbox is a two-stage gear speed-increasing mechanism that transmits the rotational speed of the rotary shuttle motor output shaft to the rotary shuttle shaft at twice the speed.

[0013] In the above-mentioned multi-axis drive structure for a sewing machine, the needle bar motor and the rotary hook motor have the same rated speed and are both servo motors, while the tooth lifting motor and the fabric feeding motor are stepper motors.

[0014] In the aforementioned multi-axis drive structure for a sewing machine, the needle bar motor, shuttle motor, toother motor, and feed motor are all connected to the sewing machine controller, which adjusts the motor phase in real time through encoder feedback.

[0015] A sewing machine comprising the aforementioned multi-axis drive structure.

[0016] The advantages of this utility model:

[0017] This invention features a simple structure. The needle bar drive, the feed dog drive, the fabric feed drive, and the rotary hook drive each employ an independent motor to control the needle bar, the fabric feed / feed dog movement, and the rotary hook motion, respectively. This replaces the traditional single-motor + mechanical transmission structure, which requires a cumbersome mechanical transmission structure. This invention simplifies mechanical complexity, reduces noise and vibration, improves control precision, and meets different sewing needs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0025] Please see Figure 1 This embodiment provides a sewing machine, which includes a multi-axis drive structure.

[0026] A multi-axis drive structure for a sewing machine includes a needle bar drive device, a dog lifting drive device, a fabric feeding drive device, a rotary hook drive device, a needle bar assembly 1 connected to the needle bar drive device, a dog holder assembly 2 connected to the dog lifting drive device and the fabric feeding drive device respectively, and a rotary hook 3 connected to the rotary hook drive device.

[0027] The needle bar drive device includes a needle bar shaft 4 and a needle bar motor 5. The needle bar motor 5 drives the needle bar assembly 1 to move up and down through the needle bar shaft 4.

[0028] The tooth lifting drive device includes a tooth lifting shaft 6, a tooth lifting motor 7, and a tooth lifting transmission assembly 8. The tooth lifting motor 7 drives the tooth lifting shaft 6 to move through the tooth lifting transmission assembly 8. The fabric feeding drive device includes a fabric feeding shaft 9, a fabric feeding motor 10, and a fabric feeding transmission assembly 11. The fabric feeding motor 10 drives the fabric feeding shaft 9 to move through the fabric feeding transmission assembly 11. The tooth lifting shaft 6 and the fabric feeding shaft 9 are rotatably connected to the dental frame assembly 2, and the tooth lifting shaft 6 and the fabric feeding shaft 9 work together to drive the dental frame assembly 2.

[0029] The shuttle drive device includes a gearbox 12, a shuttle shaft 13, and a shuttle motor 14. The shuttle motor 14 drives the shuttle shaft 13 through the gearbox 12 to drive the shuttle movement.

[0030] Furthermore, the tooth lifting transmission assembly 8 and the cloth feeding transmission assembly 11 are composed of the same components, namely the first connecting rod 15, the second connecting rod 16, and the third connecting rod 17, respectively. The tooth lifting transmission assembly 8 and the cloth feeding transmission assembly 11 respectively convert the rotational motion of the tooth lifting motor 7 and the cloth feeding motor 10 into the tooth lifting shaft 6 and the cloth feeding shaft 9 swinging back and forth around their own axes, thereby driving the tooth frame assembly 2 to move up and down reciprocally.

[0031] Furthermore, the output shafts of the tooth-lifting motor 7 and the fabric-feeding motor 10 are fixed to the first connecting rod 15 by screws, and the output shafts of the two motors can rotate from 0° to 180°.

[0032] Furthermore, the third connecting rod 17 corresponding to the tooth lifting shaft 6 and the feed shaft 9 is provided with an opening groove, and the opening groove on the third connecting rod 17 is adjustablely fastened to the tooth lifting shaft 6 and the feed shaft 9 by screws.

[0033] Furthermore, the gearbox 12 is a two-stage gear speed-increasing mechanism that transmits the rotational speed of the output shaft of the shuttle motor 14 to the shuttle shaft 13 at twice the speed.

[0034] Furthermore, the needle bar motor 5 and the rotary hook motor 14 have the same rated speed and are both servo motors, while the tooth lifting motor 7 and the fabric feeding motor 10 are stepper motors.

[0035] Furthermore, the needle bar motor 5, the rotary hook motor 14, the tooth lifting motor 7, and the fabric feeding motor 10 are all connected to the sewing machine controller, and the controller adjusts the motor phase in real time through encoder feedback.

[0036] After the sewing machine controller transmits signals to each drive unit, the needle bar motor 5, shuttle motor 14, feed dog motor 7, and feed motor 10 independently control the needle bar, feed / feed dog movement, and shuttle motion, respectively. In different sewing modes (such as extra-thick fabric, thin fabric, etc.), the controller independently controls the synchronization of the motors in each drive unit to meet different sewing material requirements.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the patent protection scope of this utility model should be determined by the appended claims.

Claims

1. A multi-axis drive structure for a sewing machine, characterized in that: It includes a needle bar drive device, a tooth lifting drive device, a fabric feeding drive device, a rotary hook drive device, a needle bar assembly (1) connected to the needle bar drive device, a tooth frame assembly (2) connected to the tooth lifting drive device and the fabric feeding drive device respectively, and a rotary hook (3) connected to the rotary hook drive device. The needle bar drive device includes a needle bar shaft (4) and a needle bar motor (5). The needle bar motor (5) drives the needle bar assembly (1) to move up and down through the needle bar shaft (4). The tooth lifting drive device includes a tooth lifting shaft (6), a tooth lifting motor (7), and a tooth lifting transmission assembly (8). The tooth lifting motor (7) drives the tooth lifting shaft (6) to move through the tooth lifting transmission assembly (8). The fabric feeding drive device includes a fabric feeding shaft (9), a fabric feeding motor (10), and a fabric feeding transmission assembly (11). The fabric feeding motor (10) drives the fabric feeding shaft (9) to move through the fabric feeding transmission assembly (11). The tooth lifting shaft (6) and the fabric feeding shaft (9) are rotatably connected to the dental frame assembly (2). The tooth lifting shaft (6) and the fabric feeding shaft (9) work together to drive the dental frame assembly (2). The shuttle drive device includes a gearbox (12), a shuttle shaft (13), and a shuttle motor (14). The shuttle motor (14) drives the shuttle shaft (13) through the gearbox (12) to drive the shuttle to move.

2. The multi-axis drive structure for a sewing machine according to claim 1, characterized in that: The tooth lifting transmission assembly (8) and the cloth feeding transmission assembly (11) are composed of the same parts, namely the first connecting rod (15), the second connecting rod (16), and the third connecting rod (17), respectively. The tooth lifting transmission assembly (8) and the cloth feeding transmission assembly (11) respectively convert the rotational motion of the tooth lifting motor (7) and the cloth feeding motor (10) into the tooth lifting shaft (6) and the cloth feeding shaft (9) swinging back and forth around their own axes, thereby driving the tooth frame assembly (2) to move up and down reciprocally.

3. The multi-axis drive structure for a sewing machine according to claim 2, characterized in that: The output shafts of the tooth-lifting motor (7) and the cloth-feeding motor (10) are fixed to the first connecting rod (15) by screws, and the output shafts of the two motors can rotate from 0° to 180°.

4. The multi-axis drive structure for a sewing machine according to claim 2, characterized in that: The third connecting rod (17) corresponding to the tooth lifting shaft (6) and the feed shaft (9) is provided with an opening groove. The opening groove on the third connecting rod (17) is adjustablely fastened to the tooth lifting shaft (6) and the feed shaft (9) by screws.

5. A multi-axis drive structure for a sewing machine according to claim 1, characterized in that: The gearbox (12) is a two-stage gear speed-increasing mechanism that transmits the rotational speed of the output shaft of the shuttle motor (14) to the shuttle shaft (13) at twice the speed.

6. A multi-axis drive structure for a sewing machine according to claim 1, characterized in that: The needle bar motor (5) and the shuttle motor (14) have the same rated speed and are both servo motors. The tooth lifting motor (7) and the fabric feeding motor (10) are stepper motors.

7. A multi-axis drive structure for a sewing machine according to claim 6, characterized in that: The needle bar motor (5), shuttle motor (14), tooth lifting motor (7), and feed motor (10) are all connected to the sewing machine controller, and the controller adjusts the motor phase in real time through encoder feedback.

8. A sewing machine, characterized in that: Includes the multi-axis drive structure as described in any one of claims 1-7.

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