Rotating shuttle of sewing machine

Abstract

The utility model discloses a rotating shuttle of a sewing machine, relates to the technical field of sewing machines, and aims to solve the problem of rotation friction of an inner shell and an outer shell of the rotating shuttle in the use process without considering the problem of rotation friction of the inner shell and the outer shell in the use process, and is not provided with any lubricating structure, so that the inner shell and the outer shell possibly generate violent friction in the subsequent use process. The device comprises a bottom rotary part, an outer rotary shell arranged above the bottom rotary part and an inner rotary shell rotationally installed in the outer rotary shell, a first rotary groove matched with the inner rotary shell is formed in the connecting position of the outer rotary shell and the inner rotary shell, a second rotary groove is formed above the first rotary groove, and the outer rotary shell and the inner rotary shell are arranged in the second rotary groove. And a plurality of groups of lubricating blocks are arranged in the first spiral groove. The multiple sets of lubricating blocks are installed in the installation grooves in the bottom end face of the outer rotating shell, when the lubricating blocks and the installation grooves rotate, the rotating speed will extrude the lubricating blocks, and lubricating oil in the lubricating blocks flows to the first rotating groove and the second rotating groove along the oil guide grooves in the outer side.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a rotary hook of a sewing machine. Background Art

[0002] The rotary hook of a sewing machine is a key component in a sewing machine. It is responsible for forming a stitch and working in cooperation with the sewing needle to ensure the smooth progress of sewing. When in use, the rotary hook mainly has the functions of hooking the thread, expanding the thread, and feeding the thread. Moreover, the quality and performance of the rotary hook will directly affect the use effect and service life of the sewing machine.

[0003] A rotary hook of a sewing machine with the Chinese utility model publication number CN205917449U. This utility model discloses a rotary hook of a sewing machine, which is designed by combining a shuttle body, a shuttle tip, a bobbin, a slot, a switch, and a needle guard. Two slots are processed at the top of the bobbin, facilitating smooth thread feeding and preventing thread entanglement.

[0004] There are at least the following problems in this technology. Friction will occur between the shuttle body and the bobbin of this rotary hook of the sewing machine during use, and the above rotary hook does not have a lubrication function during use. Therefore, after long-term use, due to the continuous intense friction between the two, it seriously affects the service life of the sewing machine. Therefore, a rotary hook of a sewing machine is now proposed. Summary of the Utility Model

[0005] In order to improve the problem that in the process of using some rotary hooks, the problem of rotational friction between their inner shell and outer shell during use is not considered, and no lubrication structure is provided, which may cause intense friction during subsequent use of the two and affect their service life, the utility model provides a rotary hook of a sewing machine.

[0006] The utility model provides a rotary hook of a sewing machine, adopting the following technical scheme: a rotary hook of a sewing machine, including a bottom rotary, an outer rotary housing arranged above the bottom rotary, and an inner rotary housing rotatably installed inside the outer rotary housing. A first rotary groove matching the inner rotary housing is opened at the connection between the outer rotary housing and the inner rotary housing. A second rotary groove is arranged above the first rotary groove. The first rotary groove is arranged at the bottom end surface of the outer rotary housing, and multiple groups of lubricating blocks are arranged inside the first rotary groove.

[0007] By adopting the above technical scheme, during the overall rotation of the rotary hook, the multiple groups of lubricating blocks inside the first rotary groove squeeze the lubricating oil to the first rotary groove through the rotational force, so that the friction between the outer rotary housing and the inner rotary housing can be reduced during rotation.

[0008] Optionally, an installation groove matching the lubricating block is opened at the position of the lubricating block in the first rotary groove, and the installation groove is opened inside the first rotary groove.

[0009] By adopting the above technical solution, the installation groove facilitates the installation and fixation effect of the lubricating block.

[0010] Optionally, a diversion groove is provided on the inner wall of the outer rotating housing at the first rotating groove, the other end of the diversion groove is connected to the second rotating groove, and one end of the diversion groove located at the first rotating groove is connected to the installation groove.

[0011] By adopting the above technical solution, the diversion groove can facilitate the diversion of the lubricating oil stored inside itself to the inside of the second rotating groove via the first rotating groove and the diversion groove after the lubricating block is rotationally squeezed, so that there is lubricating oil inside both the first rotating groove and the second rotating groove.

[0012] Optionally, a guide rod is fixedly installed in the middle inside the inner rotating housing.

[0013] By adopting the above technical solution, the guide rod facilitates the installation of the coil inside the inner rotating housing.

[0014] Optionally, a detachable structure is provided at the tip of the outer rotating housing. The detachable structure includes a connecting block, the connecting block is fixedly installed on the bottom end face of the tip, and a slot matching the connecting block is provided at the connection between the outer rotating housing and the connecting block.

[0015] By adopting the above technical solution, the connecting block provided at the tip and the slot provided at the outer rotating housing can achieve the detachable installation effect at the tip.

[0016] Optionally, guiding grooves are provided on both sides of the connecting block. The guiding grooves are of an inverted V-shaped structure, and guiding blocks matching the guiding grooves are fixedly installed at the connection between the slot and the guiding grooves.

[0017] By adopting the above technical solution, the guiding grooves and the guiding blocks can make the connection effect better when they are installed.

[0018] Optionally, a spring pressing rod is elastically provided on the outside of the guiding block. The front end of the spring pressing rod is of a slope structure, and an installation opening matching the spring pressing rod is provided at the connection between the connecting block and the spring pressing rod. The installation opening is provided on the connecting block.

[0019] By adopting the above technical solution, when the spring pressing rod is inserted into the guiding block at the slot inside the guiding groove at the connecting block, the spring pressing rod can be squeezed by the inverted V-shaped structure inside the guiding groove, and after being squeezed, it can elastically bounce back to the installation opening by its own elasticity, so as to connect and fix the position of the tip.

[0020] Optionally, both the outer rotating housing and the inner rotating housing are made of tungsten steel, and wear-resistant coatings are provided on the surfaces of both the outer rotating housing and the inner rotating housing.

[0021] By adopting the above technical solutions, the tungsten steel material and the wear-resistant coating can increase the wear resistance and service life of the outer rotating housing and the inner rotating housing during use.

[0022] In summary, the present utility model has the following beneficial effects:

[0023] 1. In the present utility model, a plurality of lubricating blocks are arranged inside a plurality of installation grooves, and the rotating force during the rotation of the inner rotating housing and the outer rotating housing is used to squeeze the lubricating blocks, so that the lubricating oil stored inside the lubricating blocks is discharged through the rotating force and discharged into the first rotating groove. And after continuous rotation, the lubricating oil inside the first rotating groove will flow into the second rotating groove through the diversion groove, thereby realizing the lubricating effect on the outer rotating housing and the inner rotating housing during rotation.

[0024] 2. The present utility model realizes the detachable installation effect at the rotating tip through the connecting block of the detachable component and the slot at the outer rotating housing. During the installation process, the rotating tip is directly inserted into the slot, and the connecting block and the guiding groove at the rotating tip will squeeze the elastic pressing rod of the guiding block in the slot, and after the rotating tip is inserted to a certain position, the elastic pressing rod will pop out and be stuck at the installation opening, thereby completing the clamping effect on the rotating tip. Subsequently, simply squeezing the elastic pressing rod can separate the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present utility model.

[0026] Figure 2 is a schematic structural diagram of the outer rotating housing of the present utility model.

[0027] Figure 3 is a schematic structural diagram of the rotating tip of the present utility model.

[0028] Figure 4 is a schematic structural diagram of the outer rotating housing of the present utility model at the detachable component.

[0029] Figure 5 is the present utility model Figure 4 Partial enlarged structural diagram at A.

[0030] Description of the reference numerals:

[0031] 1, bottom rotation; 2, outer rotating housing; 3, inner rotating housing; 4, first rotating groove; 5, second rotating groove; 6, lubricating block; 7, installation groove; 8, diversion groove; 9, guiding rod; 10, connecting block; 11, slot; 12, guiding groove; 13, guiding block; 14, elastic pressing rod; 15, installation opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following further elaborates on this application in detail Figures 1-5 with reference to the appended drawings.

[0033] Please refer to Figure 1 and Figure 2 , a rotary hook for a sewing machine, comprising a bottom rotary 1, an outer rotary housing 2 arranged above the bottom rotary 1, and an inner rotary housing 3 rotatably installed inside the outer rotary housing 2. A first rotary groove 4 matching the inner rotary housing 3 is provided at the connection between the outer rotary housing 2 and the inner rotary housing 3. A second rotary groove 5 is arranged above the first rotary groove 4. The first rotary groove 4 is arranged on the bottom end surface of the outer rotary housing 2, and a plurality of lubricating blocks 6 are arranged inside the first rotary groove 4. An installation groove 7 matching the lubricating block 6 is provided at the position of the lubricating block 6 in the first rotary groove 4. The installation groove 7 is arranged inside the first rotary groove 4. A diversion groove 8 is provided on the inner wall of the outer rotary housing 2 at the position of the first rotary groove 4. The other end of the diversion groove 8 is connected to the second rotary groove 5, and one end of the diversion groove 8 at the position of the first rotary groove 4 is connected to the installation groove 7. The plurality of lubricating blocks 6 arranged inside the plurality of installation grooves 7 can discharge the lubricating oil stored inside the lubricating blocks 6 into the first rotary groove 4 through the rotational force during the rotation of the inner rotary housing 3 and the outer rotary housing 2. And after the overall rotary hook continuously rotates, the lubricating oil inside the first rotary groove 4 will flow into the second rotary groove 5 through the diversion groove 8, thereby realizing the lubricating effect on the outer rotary housing 2 and the inner rotary housing 3 during rotation.

[0034] Refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 , a guide rod 9 is fixedly installed in the middle inside the inner rotary housing 3. The guide rod 9 is convenient for installing a coil inside the inner rotary housing 3. A detachable structure is provided at the tip of the outer rotary housing 2. The detachable structure includes a connecting block 10. The connecting block 10 is fixedly installed on the bottom end surface of the tip. And a slot 11 matching the connecting block 10 is provided at the connection between the outer rotary housing 2 and the connecting block 10. The connecting block 10 arranged at the tip and the slot 11 arranged on the outer rotary housing 2 can realize the detachable installation effect at the tip. Guide grooves 12 are provided on both sides of the connecting block 10. The guide grooves 12 are in an eight-shaped structure. And a guide block 13 matching the guide grooves 12 is fixedly installed at the connection between the slot 11 and the guide grooves 12. An elastic pressing rod 14 is elastically arranged on the outside of the guide block 13. The front end of the elastic pressing rod 14 is in a slope structure. And an installation port 15 matching the elastic pressing rod 14 is provided at the connection between the connecting block 10 and the elastic pressing rod 14. The installation port 15 is arranged on the connecting block 10. When the elastic pressing rod 14 can be inserted into the guide block 13 inside the slot 11 through the guide grooves 12 at the connecting block 10, the elastic pressing rod 14 can be extruded through the eight-shaped structure inside the guide grooves 12, and after extrusion, it can elastically bounce back to the installation port 15 through its own elasticity, thereby connecting and fixing the position of the tip. Both the outer rotary housing 2 and the inner rotary housing 3 are made of tungsten steel, and wear-resistant coatings are applied on the surfaces of both the outer rotary housing 2 and the inner rotary housing 3. The tungsten steel material and the wear-resistant coating can increase the wear resistance and service life of the outer rotary housing 2 and the inner rotary housing 3 during use.

[0035] The implementation principle of the present utility model is as follows: First, a plurality of lubricating blocks 6 are placed inside the installation groove 7. Here, the lubricating block 6 can be a sponge block or other block-shaped materials with storage and adsorption effects. Then, the inner rotating housing 3 is installed inside the outer rotating housing 2. After the coil is installed and fixed inside the inner rotating housing 3 through the guide rod 9, the whole rotating shuttle is placed at the rotating shuttle placement location of the sewing machine. During the use of the rotating shuttle, the rotating components of the sewing machine drive the outer rotating housing 2 and the inner rotating housing 3 to rotate. When the outer rotating housing 2 and the inner rotating housing 3 rotate, the lubricating block 6 at the first rotating groove 4 will discharge the lubricating oil under the extrusion force of their rotation. The discharged lubricating oil then lubricates the inner rotating housing 3 along the first rotating groove 4. And as the outer rotating housing 2 and the inner rotating housing 3 continue to rotate, the lubricating oil can flow through the diversion groove 8 into the second rotating groove 5 to lubricate the outer sides above the outer rotating housing 2 and the inner rotating housing 3, thereby realizing the lubrication effect on the whole outer rotating housing 2 and the inner rotating housing 3, reducing the friction between the two. Finally, after use, it can be replaced according to the usage condition of the rotating tip. When replacing, manually press the elastic pressing rod 14 and make the elastic pressing rod 14 disengage from the installation opening 15, then take out the rotating tip and place a new rotating tip. When placing the rotating tip, the guide groove 12 of the connecting block 10 below the rotating tip will be inserted into the guide block 13 of the slot 11. And because the guide groove 12 is in a figure-eight structure, the guide groove 12 will squeeze the elastic pressing rod 14 when inserted, and make the elastic pressing rod 14 compressed. When the rotating tip is installed in place, the elastic pressing rod 14 will pop out and re-lock at the installation opening 15 of the connecting block 10 to fix the rotating tip.

[0036] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A sewing machine rotating hook, comprising a bottom rotating part (1), an outer rotating housing (2) arranged above the bottom rotating part (1), and an inner rotating housing (3) rotatably installed inside the outer rotating housing (2), characterized in that: A first rotation groove (4) matching the inner rotation housing (3) is provided at the connection between the outer rotation housing (2) and the inner rotation housing (3). A second rotation groove (5) is provided above the first rotation groove (4). The first rotation groove (4) is provided at the bottom end surface of the outer rotation housing (2), and a plurality of lubricating blocks (6) are provided inside the first rotation groove (4).

2. A rotating hook for a sewing machine according to claim 1, characterized in that: An installation groove (7) matching the lubricating block (6) is provided at the position of the lubricating block (6) in the first rotation groove (4), and the installation groove (7) is provided inside the first rotation groove (4).

3. A rotating hook for a sewing machine according to claim 2, characterized in that: A diversion groove (8) is provided on the inner wall of the outer rotation housing (2) at the position of the first rotation groove (4). The other end of the diversion groove (8) is connected to the second rotation groove (5), and one end of the diversion groove (8) at the position of the first rotation groove (4) is connected to the installation groove (7).

4. A rotating hook for a sewing machine according to claim 1, characterized in that: A guide rod (9) is fixedly installed in the middle of the inner rotation housing (3).

5. A rotary hook for a sewing machine according to claim 1, characterized in that: A detachable structure is provided at the tip of the outer rotation housing (2). The detachable structure includes a connection block (10). The connection block (10) is fixedly installed on the bottom end surface of the tip, and a slot (11) matching the connection block (10) is provided at the connection between the outer rotation housing (2) and the connection block (10).

6. A rotating hook for a sewing machine according to claim 5, characterized in that: Guide grooves (12) are provided on both sides of the connection block (10). The guide grooves (12) are of an inverted V-shaped structure, and a guide block (13) matching the guide grooves (12) is fixedly installed at the connection between the slot (11) and the guide grooves (12).

7. A rotary hook for a sewing machine according to claim 6, characterized in that: A spring pressing rod (14) is elastically provided on the outside of the guide block (13). The front end of the spring pressing rod (14) is of a ramp structure, and an installation opening (15) matching the spring pressing rod (14) is provided at the connection between the connection block (10) and the spring pressing rod (14). The installation opening (15) is provided on the connection block (10).

8. A rotating hook for a sewing machine according to claim 1, wherein: Both the outer rotation housing (2) and the inner rotation housing (3) are made of tungsten steel, and wear-resistant coatings are provided on the surfaces of the outer rotation housing (2) and the inner rotation housing (3).

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