Sewing machine with high transmission synchronism

Abstract

The utility model relates to a sewing machine with strong transmission synchronism. The transmission mechanism mainly solves the problems that an existing transmission mechanism of the sewing machine is complex in structure, poor in transmission stability, poor in synchronism and low in use performance. Comprising a machine shell, a machine needle, a needle plate, a main shaft, a material ejecting shaft and a transmission mechanism, the transmission mechanism comprises a motor, an output shaft, a driving wheel, an eccentric wheel, an eccentric connecting rod, a rotating arm and a driven wheel, the motor drives the output shaft to rotate, the driving wheel and the eccentric wheel are coaxially arranged on the output shaft, and the eccentric connecting rod is matched with the eccentric wheel. The eccentric connecting rod is hinged to the rotating arm, the rotating arm is connected with the material ejecting shaft, the driving wheel is in transmission fit with the driven wheel, and the driven wheel is connected with the main shaft. The sewing machine adopts the transmission mechanism to drive the main shaft and the ejection shaft to rotate so as to achieve the purpose of transmission, effectively achieves structural optimization, is simple, compact, reasonable and reliable in structure, reduces production cost, is convenient to maintain, and further has the advantages of being high in synchronism, good in transmission stability and the like.

Description

Technical Field

[0001] The utility model relates to a sewing device, in particular to a sewing machine with strong transmission synchronization. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. A sewing machine can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, and products such as leather, plastic, and paper. The stitches are neat, beautiful, flat, and firm, and the sewing speed is fast and easy to use. Existing sewing machines include a main shaft, a needle, a feed shaft, and a push rod. The main shaft and the needle are matched in transmission, and the feed shaft is connected to the push rod. However, due to structural limitations, the sewing machine with strong transmission synchronization has defects such as complex structure, poor transmission stability, and low performance when driving the main shaft and the feed shaft. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the background technology, the utility model provides a sewing machine with strong transmission synchronization, which mainly solves the problems of complex structure, poor transmission stability, poor synchronization and low performance of the transmission mechanism of the existing sewing machine.

[0004] The technical solution of the utility model is: a sewing machine with strong transmission synchronization, including a casing, a needle, a needle plate, a main shaft and a feed-ejecting shaft, the main shaft drives the needle, and also includes a transmission mechanism that cooperates with the main shaft and the feed-ejecting shaft, the transmission mechanism includes a motor, an output shaft, a driving wheel, an eccentric wheel, an eccentric connecting rod, a rotating arm and a driven wheel, the motor drives the output shaft to rotate, the driving wheel and the eccentric wheel are coaxially arranged on the output shaft, the upper end of the eccentric connecting rod cooperates with the eccentric wheel, the lower end of the eccentric connecting rod is hinged to one end of the rotating arm, the other end of the rotating arm is connected to the feed-ejecting shaft, the driving wheel cooperates with the driven wheel, and the driven wheel is connected to the main shaft.

[0005] The eccentric wheel includes a positioning portion and a cam portion. The positioning portion is sleeved on the output shaft, and the cam portion is integrally connected with the positioning portion. A self-aligning bearing matching with the cam portion is provided on the outer side of the cam portion. A transmission sleeve matching with the self-aligning bearing is provided on the upper end of the eccentric connecting rod, and the lower end of the eccentric connecting rod is connected to the swing arm.

[0006] The positioning part is sleeved on the output shaft, a clamping opening is provided on the positioning part, and a fastening screw is passed through the clamping opening.

[0007] The utility model has the following beneficial effects: the sewing machine adopts a transmission mechanism composed of a motor, an output shaft, a driving wheel, an eccentric wheel, an eccentric connecting rod, a rotating arm and a driven wheel to drive the main shaft and the ejector shaft to rotate to achieve the purpose of transmission, effectively realizing structural optimization, with a simple, compact, reasonable and reliable structure, reducing production costs, facilitating maintenance, and also having the advantages of strong synchronization, good transmission stability and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Figure 2 It is a partial structural schematic diagram of the utility model.

[0010] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0011] Figure 4 It is a partial structural schematic diagram of the utility model.

[0012] In the figure, the casing 1, the needle 2, the main shaft 3, the ejector shaft 4, the motor 5, the output shaft 6, the driving wheel 7, the eccentric wheel 8, the positioning part 81, the cam part 82, the clamping mouth 83, the eccentric connecting rod 9, the rotating arm 10, the driven wheel 11, the self-aligning bearing 12, and the fastening screw 13. DETAILED DESCRIPTION

[0013] The following is further described with respect to the embodiments of the present invention:

[0014] As shown in the figure, a sewing machine with strong transmission synchronization includes a casing 1, a needle 2, a needle plate, a main shaft 3 and a feed shaft 4. The main shaft 4 drives the needle 2 and also includes a transmission mechanism that cooperates with the main shaft 4 and the feed shaft 5. The transmission mechanism includes a motor 5, an output shaft 6, a driving wheel 7, an eccentric wheel 8, an eccentric connecting rod 9, a rotating arm 10 and a driven wheel 11. The motor 5 drives the output shaft 6 to rotate, and the driving wheel 7 and the eccentric wheel 8 are coaxially arranged on the output shaft 6. The upper end of the eccentric connecting rod 9 cooperates with the eccentric wheel 8, and the lower end of the eccentric connecting rod 9 is hinged to one end of the rotating arm 10. The other end of the rotating arm 10 is connected to the feed shaft 5, and the driving wheel 7 cooperates with the driven wheel 11, and the driven wheel 11 is connected to the main shaft 4. When in use, the motor 5 is started to drive the output shaft 6 to rotate, and the output shaft 6 drives the driving wheel 7 to rotate. At the same time, the output shaft 6 drives the eccentric wheel 8 to rotate eccentrically, and the driving wheel 7 drives the driven wheel 11 synchronously through a chain or belt. When the eccentric wheel 8 rotates, it drives the eccentric connecting rod 9 to move up and down, thereby driving the rotating arm 10 to rotate. The rotating arm 10 is connected to the ejecting shaft 5, so it can drive the ejecting shaft 5 to rotate to drive the ejecting rod to realize ejecting. According to the above scheme, the sewing machine adopts a transmission mechanism composed of a motor, an output shaft, a driving wheel, an eccentric wheel, an eccentric connecting rod, a rotating arm and a driven wheel to drive the main shaft and the ejecting shaft to rotate to achieve the purpose of transmission, effectively realizing structural optimization, simple, compact and reasonable and reliable structure, reducing production costs, convenient maintenance, and also has the advantages of strong synchronization and good transmission stability.

[0015] In the utility model, as shown in the figure, the eccentric wheel 8 includes a positioning part 81 and a cam part 82, the positioning part 81 is sleeved on the output shaft 6, the cam part 82 is integrally connected with the positioning part 81, the outer side of the cam part 81 is provided with a self-aligning bearing 12 matched therewith, the upper end of the eccentric connecting rod 9 is provided with a transmission sleeve 91 that is transmission matched with the self-aligning bearing 12, and the lower end of the eccentric connecting rod 9 is connected with the swing arm 10. The eccentric wheel 8 includes a positioning part 81 and a cam part 82 that are integrally connected, the positioning part 81 is sleeved on the output shaft and locked by a fastening screw, the eccentric connecting rod and the cam part are transmission matched by the self-aligning bearing 12, when the output shaft rotates, the cam part is driven to rotate eccentrically and the eccentric connecting rod is driven up and down by the self-aligning bearing to drive the swing arm to rotate, and the swing arm rotates to drive the ejection shaft to rotate to achieve the purpose of ejection, and the above scheme has the advantages of reasonable and reliable action, good transmission stability, simple and compact structure, etc.

[0016] In the present invention, as shown in the figure, the positioning part 81 is sleeved on the output shaft 6, and a clamping opening 83 is provided on the positioning part 81, and a fastening screw 13 is passed through the clamping opening 83. By providing the clamping opening and locking by the fastening screw 13, it has the advantages of convenient and reliable installation and high connection firmness.

Claims

1. A sewing machine with strong transmission synchronization, comprising a housing (1), a needle (2), a needle plate, a main shaft (3) and a feed-ejecting shaft (4), wherein the main shaft (3) drives the needle (2), and is characterized in that: It also includes a transmission mechanism that cooperates with the main shaft (3) and the ejection shaft (4), the transmission mechanism comprising a motor (5), an output shaft (6), a driving wheel (7), an eccentric wheel (8), an eccentric connecting rod (9), a rotating arm (10) and a driven wheel (11), the motor (5) drives the output shaft (6) to rotate, the driving wheel (7) and the eccentric wheel (8) are coaxially arranged on the output shaft (6), the upper end of the eccentric connecting rod (9) cooperates with the eccentric wheel (8), the lower end of the eccentric connecting rod (9) is hinged to one end of the rotating arm (10), the other end of the rotating arm (10) is connected to the ejection shaft (4), the driving wheel (7) cooperates with the driven wheel (11), and the driven wheel (11) is connected to the main shaft (3).

2. A sewing machine with strong transmission synchronization according to claim 1, characterized in that: The eccentric wheel (8) comprises a positioning portion (81) and a cam portion (82); the positioning portion (81) is sleeved on the output shaft (6); the cam portion (82) and the positioning portion (81) are integrally connected; a self-aligning bearing (12) is provided on the outer side of the cam portion (82) and is matched with the self-aligning bearing (12); a transmission sleeve (91) is provided at the upper end of the eccentric connecting rod (9) and is matched with the self-aligning bearing (12); and the lower end of the eccentric connecting rod (9) is connected to the rotating arm (10).

3. A sewing machine with strong transmission synchronization according to claim 2, characterized in that: The positioning portion (81) is sleeved on the output shaft (6), a clamping opening (83) is provided on the positioning portion (81), and a fastening screw (13) is passed through the clamping opening (83).

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