Adjusting mechanism for axial position of rotating shuttle of sewing machine

Abstract

The utility model relates to a mechanism for adjusting the axial position of a rotating shuttle of a sewing machine, which comprises a machine base and the rotating shuttle, the rotating shuttle is fixed at one end of a rotating shuttle shaft, the rotating shuttle shaft is pivoted on a rotating shuttle seat, the rotating shuttle seat is axially and movably arranged on the machine base, and an adjusting mechanism is arranged between the machine base and the rotating shuttle seat. The adjusting mechanism drives the whole rotating shuttle seat to axially move along the rotating shuttle shaft so as to adjust the axial position of the rotating shuttle; the axial position of the rotating shuttle can be automatically adjusted through electric control without opening a needle plate and loosening a fastening screw of the rotating shuttle, and compared with existing manual adjustment, the automatic adjusting device has the advantages of being convenient to adjust and accurate in scale.

Description

Technical Field

[0001] The utility model relates to sewing machine technology, in particular to an adjusting mechanism for the axial position of a rotary hook of a sewing machine. Background Art

[0002] The rotary hook is a necessary part of the sewing machine. Different fabrics require needles of different specifications and sizes when working. When replacing needles of different sizes, the axial position of the rotary hook needs to be readjusted to confirm that the position gap between the needle and the rotary hook remains consistent. The current process for adjusting the axial position of the rotary hook is to first open the needle plate on the workbench, then loosen the fastening screws on the rotary hook with a screwdriver, and then manually adjust the axial position of the rotary hook based on experience, and then tighten the rotary hook and install the needle plate to test the effect of the adjustment. During adjustment, due to the workers' installation experience and errors, sometimes the rotary hook needs to be manually adjusted several times to reach the appropriate position, which is inefficient. Therefore, garment factories try to reduce the number of times the rotary hook position is adjusted. Utility Model Content

[0003] The utility model aims to provide an adjustment mechanism for the axial position of a rotary hook of a sewing machine, which can automatically adjust the axial position of the rotary hook through electric control without opening a needle plate and loosening a fastening screw of the rotary hook. Compared with the current manual adjustment, the utility model has the characteristics of convenient adjustment and precise scale.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] A mechanism for adjusting the axial position of a rotary hook of a sewing machine comprises a machine base and a rotary hook, wherein the rotary hook is fixed to one end of a rotary hook shaft, and the rotary hook shaft is pivotally connected to the rotary hook seat, and is characterized in that the rotary hook seat is axially movably arranged on the machine base, and an adjustment mechanism is arranged between the machine base and the rotary hook seat, and the adjustment mechanism drives the rotary hook seat to move axially along the rotary hook shaft as a whole to adjust the axial position of the rotary hook.

[0006] The machine base is located below the machine head and is provided with an installation groove. The rotary hook seat is installed in the installation groove through an axial guide mechanism. The adjustment mechanism is installed on the machine base. The axial direction of the adjustment shaft of the adjustment mechanism is parallel to the direction of the axial guide mechanism, and the adjustment shaft is threadedly matched with the rotary hook seat.

[0007] The driving device of the adjusting mechanism is a stepping motor or a servo motor, and the stepping motor or the servo motor is electronically controlled by the sewing machine.

[0008] A driving motor of a rotary hook shaft is arranged on the side of the rotary hook seat, a transmission wheel is arranged on the rotary hook shaft, and a driving device drives the rotary hook shaft to rotate through a transmission belt and a transmission wheel.

[0009] A tensioning mechanism of the transmission belt is also arranged on the rotary hook seat.

[0010] The utility model drives the rotary hook seat to move axially through the adjusting shaft of the adjusting mechanism, and then changes the axial position of the rotary hook through the rotary hook shaft, thereby realizing the adjustment of the rotary hook position. The rotary hook position is automatically adjusted by the motor and the electric control. Compared with the existing manual direct adjustment of the rotary hook installation position method, the utility model is more accurate and faster in adjusting the axial position of the rotary hook seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model on a sewing machine;

[0012] Figure 2 This is a schematic diagram of the structure of the rotary hook seat of the utility model (I);

[0013] Figure 3 This is a schematic diagram of the structure of the rotary hook seat of the utility model (II);

[0014] Figure 4 This is a schematic structural diagram of the rotary hook seat of the utility model (III). DETAILED DESCRIPTION

[0015] like Figure 1-4 As shown, a mechanism for adjusting the axial position of a rotary hook of a sewing machine comprises a machine base 1 and a rotary hook 2, wherein the rotary hook 2 is fixed at one end of a rotary hook shaft 3, and the rotary hook shaft 3 is pivotally connected to a rotary hook seat 9, wherein the machine base 1 is located below the machine head and is provided with a mounting groove 11, wherein the rotary hook seat 9 is installed in the mounting groove 11 through an axial guide mechanism 12, wherein the rotary hook seat 9 is movably arranged in the mounting groove 11 along the axial direction of the rotary hook shaft 3, and an adjusting mechanism is arranged between the machine base and the rotary hook seat, wherein a driving device 8 of the adjusting mechanism is installed on the machine base 1, wherein the driving device 8 is a stepping motor or a servo motor, and wherein the stepping motor or the servo motor is electronically controlled by the sewing machine; wherein the axial direction of an adjusting shaft 82 of the adjusting mechanism is arranged parallel to the direction of the axial guide mechanism 12, and the adjusting shaft 82 is threadedly matched with the rotary hook seat 9; wherein the adjusting mechanism drives the rotary hook seat as a whole to move axially along the rotary hook shaft 3 to adjust the axial position of the rotary hook 2.

[0016] A drive motor 30 of the shuttle shaft 3 is arranged on the side of the shuttle seat, and a transmission wheel 31 is arranged on the shuttle shaft 3. The drive motor 30 drives the shuttle shaft 3 to rotate through a transmission belt 32 and the transmission wheel 31; a tensioning mechanism 33 of the transmission belt is also arranged on the shuttle seat 9.

[0017] The adjusting mechanism of the present invention directly drives the shuttle seat 9 to move axially along the shuttle shaft 3 through the adjusting shaft 82. The axial position of the shuttle 2 is also adjusted through the overall movement of the shuttle seat 9. The adjusting shaft 82 is threadedly matched with the shuttle seat 9. The high-precision movement of the automatic shuttle seat 9 can be achieved through the stepping motor or servo motor in conjunction with the electronic control, thereby achieving high-precision adjustment of the shuttle 2. Compared with the existing manual direct adjustment of the installation position of the shuttle, the present invention is more accurate and faster in adjusting the axial position of the shuttle seat.

Claims

1. A mechanism for adjusting the axial position of a rotary hook of a sewing machine, comprising a machine base (1) and a rotary hook (2), wherein the rotary hook (2) is fixed to one end of a rotary hook shaft (3), and the rotary hook shaft (3) is pivotally connected to a rotary hook seat (9), characterized in that: The rotary hook seat (9) is axially movably arranged on the machine base (1), and an adjustment mechanism is arranged between the machine base and the rotary hook seat. The adjustment mechanism drives the rotary hook seat as a whole to move axially along the rotary hook shaft (3) to adjust the axial position of the rotary hook (2).

2. The mechanism for adjusting the axial position of a rotary hook of a sewing machine according to claim 1, characterized in that: The machine base (1) is located below the machine head and is provided with a mounting groove (11). The rotary hook seat (9) is installed in the mounting groove (11) via an axial guide mechanism (12). The adjustment mechanism is installed on the machine base (1). The axial direction of the adjustment shaft (82) of the adjustment mechanism is parallel to the direction of the axial guide mechanism (12). The adjustment shaft (82) is threadedly matched with the rotary hook seat (9).

3. The mechanism for adjusting the axial position of a rotary hook of a sewing machine according to claim 2, characterized in that: The driving device (8) of the adjusting mechanism is a stepping motor or a servo motor, and the stepping motor or the servo motor is electronically controlled by the sewing machine.

4. The mechanism for adjusting the axial position of a rotary hook of a sewing machine according to claim 1, characterized in that: A driving motor (30) for a rotary shuttle shaft (3) is arranged on the side of the rotary shuttle seat, and a transmission wheel (31) is arranged on the rotary shuttle shaft (3). The driving motor (30) drives the rotary shuttle shaft (3) to rotate via a transmission belt (32) and the transmission wheel (31).

5. The mechanism for adjusting the axial position of a rotary hook of a sewing machine according to claim 4, characterized in that: A tensioning mechanism (33) of a transmission belt is also arranged on the rotary hook seat (9).

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