Locking structure for outer shuttle of lockstitch sewing rotating shuttle

Abstract

The utility model discloses a lockstitch rotating shuttle outer shuttle locking structure in the technical field of sewing machine rotating shuttles, which comprises a shuttle frame of a rotating shuttle, a shuttle race is mounted at the bottom of the outer side of the shuttle frame, a shuttle skin is sleeved on the outer side of the shuttle race, a boss is connected to the bottom of the shuttle race, an axis hole is arranged at the bottom of the shuttle race and the center of one side of the boss, and the axis hole is communicated with the shuttle race. An adjusting assembly used for adjusting the tension degree of a lock catch is installed on one side of the boss, the boss can increase the contact area of the shuttle race, a bottom shaft of the sewing machine and an axis hole in the boss are installed and fixed, the tension degree of the shuttle race can be adjusted through the adjusting assembly, the axis hole and the bottom shaft of the sewing machine can be tightly attached, the concentricity is better, and the service life of the shuttle race is prolonged. Particularly, the fixed part of the rotating shuttle cannot be loosened under high-speed operation of the industrial sewing machine, and the problems that an existing rotating shuttle is generally in a closed-loop round hole shape and is installed on a bottom shaft of the sewing machine, loosening is prone to occurring, the tightness of the rotating shuttle is inconvenient to adjust, and the fitting degree and stability of installation of the rotating shuttle are affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machine rotary hooks, in particular to an outer hook locking structure for a flat-seam rotary hook. Background Art

[0002] The rotary hook is an important part of the sewing machine. Among the sewing equipment, the most common sewing machine is the lockstitch sewing machine. Most of these sewing machines use a rotary hook, which hooks the thread loop with its shuttle tip, expands the thread loop, and guides the thread loop around the shuttle core to form a lockstitch. At present, the installation of the rotary hook and the bottom shaft of the sewing machine is easy to loosen, which affects the installation and fixation of the rotary hook.

[0003] The existing rotary hook is usually installed on the bottom shaft of the sewing machine in the shape of a closed loop round hole, which is easy to loosen and inconvenient to adjust the tightness of the rotary hook, affecting the fit and stability of the installation of the rotary hook. Therefore, technical personnel in this field provide a locking structure for the outer shuttle of a flat-seam rotary hook to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a locking structure for an outer hook of a flat-seam rotary hook to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a locking structure for the outer hook of a flat-seam rotary hook, comprising a hook frame of the rotary hook, a hook bed is installed at the outer bottom of the hook frame, a hook skin is sleeved on the outer side of the hook bed, and a boss is connected to the bottom of the hook bed;

[0006] Axial holes are provided at the bottom of the shuttle bed and the center of one side of the boss, an adjusting component for adjusting the locking tension is installed on one side of the boss, the shuttle frame and the shuttle bed are installed by multiple screws, and the shuttle skin and the shuttle bed are installed by multiple screws.

[0007] Preferably, the adjustment component comprises a straight groove opened on the other side of the axial hole, an arc-shaped notch is opened on the other side of the boss and located on one side of the straight groove, and the straight groove is connected to the arc-shaped notch.

[0008] Preferably: the adjustment component also includes a countersunk hole opened on one side of the boss and located on one side of the straight groove, a bottom hole is opened on the other side of the boss and located on the other side of the straight groove, bolts are installed in the countersunk hole and the bottom hole, the bolts pass through the boss and are screwed thereto, and the bolts are screwed to the bottom hole.

[0009] Preferably, a groove is provided at the other end of the countersunk hole to provide space for placing the end of the bolt.

[0010] Preferably, a tensioning portion is provided on the outer side of the boss and at one end of the straight groove, and the tensioning portion is in a right-angle arc shape.

[0011] Preferably, a deformation portion is provided at a corner of the tensioning portion, and the cross section of the deformation portion is arc-shaped.

[0012] Preferably, a rubber gasket is embedded inside the axial hole, and the rubber gasket is in an open arc shape.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, by providing a boss and an axial hole, the boss can increase the contact area of ​​the shuttle bed, the sewing machine bottom shaft and the axial hole in the boss are installed and fixed, and the tension of the shuttle bed can be adjusted by adjusting the assembly, so that the axial hole and the sewing machine bottom shaft are closely fitted, which is convenient to operate and can make the rotary shuttle and the sewing machine bottom shaft fix better. The rotary shuttle axial core hole not only has a good fit with the sewing machine bottom shaft, but also has better concentricity. Especially under the high-speed operation of the industrial sewing machine, the rotary shuttle fixing part will not loosen, and the noise generation can also be reduced.

[0015] 2. In the utility model, a straight groove, an arc-shaped notch, a countersunk hole and a bottom hole are provided, the countersunk hole and the bottom hole have co-located threads inside, the straight groove is connected with the circular hole, so that the axial hole forms an open ring, increasing the local tension and elastic effect of the boss, and the arc-shaped notch can make a separation gap exist for the boss, and the bolt is penetrated through the bottom hole and the countersunk hole for threaded rotation, so that the bolt drives the countersunk hole close to the bottom hole, that is, the width of the straight groove changes, thereby improving the convenience and stability of adjusting the tension of the boss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the shuttle bed, boss, axial hole, straight groove, arc-shaped notch, bottom hole, tensioning part, deformation part and rubber gasket in the overall structure of the utility model;

[0018] Figure 3 It is a left-side cutaway stereoscopic view of the overall structure of the utility model;

[0019] Figure 4 The front cutaway view of the overall structure of the utility model is Figure 1 ;

[0020] Figure 5 The front cutaway view of the overall structure of the utility model is Figure 2 .

[0021] In the figure: 1. shuttle rack; 2. shuttle bed; 3. shuttle skin; 4. boss; 5. axial hole; 6. straight groove; 7. arc-shaped notch; 8. countersunk hole; 9. bottom hole; 10. bolt; 11. groove; 12. tensioning part; 13. deformation part; 14. rubber gasket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 to Figure 5 In an embodiment of the utility model, a locking structure for an outer shuttle of a flat-seam rotary hook comprises a shuttle frame 1 of a rotary hook, a shuttle bed 2 is installed at the outer bottom of the shuttle frame 1, a shuttle skin 3 is mounted on the outer side of the shuttle bed 2, a boss 4 is connected to the bottom of the shuttle bed 2, an axial hole 5 is opened at the center of the bottom of the shuttle bed 2 and one side of the boss 4, an adjusting component for adjusting the locking tension is installed on one side of the boss 4, the shuttle frame 1 and the shuttle bed 2 are installed by multiple screws, and the shuttle skin 3 and the shuttle bed 2 are installed by multiple screws.

[0024] When in use, the boss 4 can increase the contact area of ​​the shuttle bed 2, and the sewing machine bottom shaft is installed and fixed with the axial center hole 5 in the boss 4. The tension of the shuttle bed 2 can be adjusted by adjusting the component, so that the axial center hole 5 and the sewing machine bottom shaft are closely fitted, which is easy to operate and can better fix the rotary shuttle and the sewing machine bottom shaft. The rotary shuttle shaft core hole not only has a good fit with the sewing machine bottom shaft, but also has better concentricity. Especially under the high-speed operation of the industrial sewing machine, the rotary shuttle fixing part will not loosen, and the noise generation can also be reduced.

[0025] In one embodiment, specifically, the adjustment component includes a straight groove 6 opened on the other side of the axial hole 5, an arc-shaped notch 7 is opened on the other side of the boss 4 and located on one side of the straight groove 6, the adjustment component also includes a countersunk hole 8 opened on one side of the boss 4 and located on one side of the straight groove 6, a bottom hole 9 is opened on the other side of the boss 4 and located on the other side of the straight groove 6, a bolt 10 is installed on the countersunk hole 8 and the bottom hole 9, the bolt 10 passes through the boss 4 and is screwed thereto, the bolt 10 is screwed to the bottom hole 9, the straight groove 6 is connected to the arc-shaped notch 7, and the bolt 10 is a hexagon socket screw.

[0026] More specifically, the countersunk hole 7 and the bottom hole 8 have co-located threads inside, and the straight groove 6 is connected to the circular hole, so that the axial hole 5 forms an open ring, increasing the local tension and elastic effect of the boss 4. The arc-shaped notch 7 can create a separation gap for the boss 4. The bolt 10 is penetrated through the bottom hole 9 and the countersunk hole 8 and threadedly rotated, so that the bolt 10 drives the countersunk hole 8 to approach the bottom hole 9, that is, the width of the straight groove 6 changes, thereby improving the convenience and stability of adjusting the tension of the boss 4.

[0027] Among them, a groove 11 is opened at the other end of the countersunk hole 8 to provide space for the end of the bolt 10. The groove 11 can provide a placement space for the end of the bolt 10, and the bolt 10 is protected against collision in the groove 11 to prevent the bolt 10 from affecting the boss 4 during operation.

[0028] Furthermore, a tensioning portion 12 is provided on the outside of the boss 4 and at one end of the straight groove 6, and a deformation portion 13 is provided at the corner of the tensioning portion 12. The cross-section of the deformation portion 13 is an arc, and the tensioning portion 12 is a right-angle arc. The tensioning portion 12 can deform the boss 4 for tensioning adjustment to facilitate the change in the distance of the straight groove 6. The deformation portion 13 can enable the bolt 10 to drive the bottom hole 9 to approach the countersunk hole 8. The deformation portion 13 can increase the degree of deformation of the boss 4 to avoid damage caused by excessive deformation of the boss 4.

[0029] In one embodiment, specifically, a rubber gasket 14 is embedded inside the axial hole 5, and the rubber gasket 14 is an open arc. When the distance of the straight groove 6 on one side of the axial hole 5 changes, the axial hole 5 will also drive the rubber gasket 14 to increase the anti-slip property of the contact between the axial hole 5 and the bottom shaft of the sewing machine, thereby improving the stability of installing the rotary hook.

[0030] The working principle of this utility model:

[0031] First, the bolt 10 is passed through the countersunk hole 8 and inserted into the bottom hole 9 through the straight groove 6, and then the bolt 10 is rotated so that the bolt 10 drives the bottom hole 9 close to the countersunk hole 8. At this time, the tensioning part 12 and the deformation part 13 on one side of the boss 4 are deformed, and at the same time, the arc-shaped notch 7 facilitates the width change of the straight groove 6, thereby deforming the axial hole 5 in the boss 4. When the inner diameter of the axial hole 5 changes, the axial hole 5 drives the rubber gasket 14 to be locked, and then the end of the bolt 10 enters the groove 11.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A locking structure for an outer hook of a flat-seam rotary hook, comprising a hook frame (1) of the rotary hook, characterized in that: A shuttle bed (2) is installed at the bottom of the outer side of the shuttle frame (1), a shuttle skin (3) is sleeved on the outer side of the shuttle bed (2), and a boss (4) is connected to the bottom of the shuttle bed (2); An axial hole (5) is provided at the bottom of the shuttle bed (2) and at the center of one side of the boss (4); an adjustment component for adjusting the locking tension is installed on one side of the boss (4); the shuttle frame (1) and the shuttle bed (2) are installed by a plurality of screws; and the shuttle skin (3) and the shuttle bed (2) are installed by a plurality of screws.

2. The outer hook locking structure of a flat-seam rotary hook according to claim 1, characterized in that: The adjustment component comprises a straight groove (6) formed on the other side of the axial center hole (5), and an arc-shaped notch (7) is formed on the other side of the boss (4) and located on one side of the straight groove (6), and the straight groove (6) is connected to the arc-shaped notch (7).

3. The outer hook locking structure of a flat-seam rotary hook according to claim 2, characterized in that: The adjustment assembly further comprises a countersunk hole (8) opened on one side of the boss (4) and located on one side of the straight groove (6); a bottom hole (9) opened on the other side of the boss (4) and located on the other side of the straight groove (6); a bolt (10) is installed on the countersunk hole (8) and the bottom hole (9); the bolt (10) passes through the boss (4) and is screwed thereto; and the bolt (10) is screwed to the bottom hole (9).

4. The outer hook locking structure of a flat-seam rotary hook according to claim 3, characterized in that: The other end of the countersunk hole (8) is provided with a groove (11) for providing a space for placing the end of the bolt (10).

5. The outer hook locking structure of a flat-seam rotary hook according to claim 3, characterized in that: A tensioning portion (12) is provided on the outside of the boss (4) and at one end of the straight groove (6), and the tensioning portion (12) is in the shape of a right-angle arc.

6. The outer hook locking structure of a flat-seam rotary hook according to claim 5, characterized in that: A deformation portion (13) is provided at a corner of the tensioning portion (12), and the deformation portion (13) has an arc-shaped cross section.

7. The outer hook locking structure of a flat-seam rotary hook according to claim 1, characterized in that: A rubber gasket (14) is embedded inside the axial hole (5), and the rubber gasket (14) is in an open arc shape.

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