Sewing machine and rotating hook for preventing contamination of thread by lubricating oil

Abstract

The application provides a bobbin winder for preventing lubricating oil from polluting cloth, comprising a bobbin holder and a bobbin bed rotatably connected with the bobbin holder, a plurality of flow channels for lubricating oil passing through are arranged on the bobbin bed, the flow channels comprise an inlet extending along the radial direction of the bobbin bed, an outlet extending along the axial direction of the bobbin bed, and a channel for connecting the inlet and the outlet; when the bobbin bed rotates, the lubricating oil thrown out enters the channel through the inlet and is finally thrown out to the outside of the bobbin winder through the outlet. The application also provides a sewing machine for preventing lubricating oil from polluting cloth, comprising the aforementioned bobbin winder. The application has the advantages that by arranging a plurality of flow channels on the bobbin bed, the direction of the lubricating oil thrown out is changed from the radial direction of the bobbin bed to the axial direction of the bobbin bed, so that the lubricating oil is prevented from falling on the parts and connecting structures between the bobbin winder and the cloth along the radial direction, thereby preventing the cloth from being polluted. While improving the quality of the sewing product, the application can also improve the upper limit of the oil consumption of the bobbin winder, thereby improving the service life and the cooling effect of the bobbin winder.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and more particularly to a sewing machine and rotary hook that prevents lubricating oil from contaminating fabric. Background Technology

[0002] The rotary hook is an important component of a sewing machine. When in operation, the tip of the rotary hook hooks onto the loop and expands it, guiding the loop to form a lockstitch.

[0003] like Figure 1 As shown, the existing rotary shuttle includes a shuttle bed 200 and a shuttle frame 100. The inner ring surface of the shuttle bed 200 is provided with a track, and the outer ring surface of the shuttle frame 100 is provided with a guide rail that is slidably connected to the track. In order to reduce the friction between the guide rail and the track and ensure that the shuttle bed 200 rotates smoothly at high speed, excessive lubricating oil is currently introduced into the connection between the two. However, this will also cause the rotary shuttle to splash excess lubricating oil onto the needle plate, gear frame, and needles, ultimately contaminating the fabric.

[0004] Combination Figure 1 It is known that there are three outlets on the existing rotary hook where lubricating oil can be ejected: the first outlet 500 at the top of the shuttle bed 200, the second outlet 600 at the bottom of the shuttle bed 200, and the third outlet 700 between the shuttle frame 100 and the shuttle bed 200. Viewed from the sewing machine head, the shuttle bed 200 rotates counterclockwise. Due to centrifugal force, the lubricating oil splashes radially along the rotary hook and is ejected through the first and second outlets 500 and 600, flying towards the needle plate, which can easily contaminate the fabric. Although the third outlet 700 is farther from the needle plate, when the lubricating oil supply is large, lubricating oil may still pass through it, potentially contaminating the fabric. Summary of the Invention

[0005] To address the aforementioned shortcomings, the present invention aims to provide a rotary hook that prevents lubricating oil from contaminating fabric, thereby solving the problem of lubricating oil splashing out and contaminating fabric in the prior art.

[0006] This invention provides a rotary shuttle for preventing lubricating oil from contaminating fabric, comprising a shuttle frame and a shuttle bed rotatably connected to the shuttle frame. The shuttle bed is provided with a plurality of flow channels for lubricating oil to pass through. The flow channels include an inlet extending radially along the shuttle bed, an outlet extending axially along the shuttle bed, and a channel for connecting the inlet and the outlet. When the shuttle bed rotates, the lubricating oil thrown out enters the channel through the inlet and is finally thrown to the outside of the rotary shuttle through the outlet.

[0007] Preferably, a ring or shuttle skin is installed on the outer ring surface of the shuttle bed, and the ring or shuttle skin covers the outside of the channel to prevent the lubricating oil from being thrown radially to the outside of the shuttle.

[0008] Preferably, a moon ring is mounted on the outer ring surface of the shuttle bed, and the moon ring is provided with an extension on one side.

[0009] Preferably, the channel is arranged on the outer ring surface of the shuttle bed.

[0010] Preferably, a guide surface is further arranged near the inlet, and the guide surface extends along the tangential direction of the inner ring surface of the shuttle bed.

[0011] Preferably, the inlet comprises an inner ring surface inlet arranged on the inner ring surface of the shuttle bed, and a track inlet arranged in the track of the shuttle bed.

[0012] Preferably, the track inlet is a round hole or an elongated hole.

[0013] Preferably, one side of the channel is provided with a bevel.

[0014] Preferably, the shuttle bed further comprises a guide piece, the flow channel is arranged in the guide piece, and the inlet is in communication with the ejection outlet on the shuttle bed.

[0015] The application further provides a sewing machine capable of preventing lubricating oil from contaminating cloth, comprising the aforementioned shuttle.

[0016] The application has the advantages that by arranging a plurality of flow channels on the shuttle bed, the ejection direction of the lubricating oil is changed from the radial direction of the shuttle bed to the axial direction of the shuttle bed, so that the lubricating oil is prevented from falling on the parts and connecting structures between the shuttle and the cloth in the radial direction, thereby preventing the cloth from being contaminated. While improving the sewing quality, the application can also increase the upper limit of the oil consumption of the shuttle, thereby prolonging the service life of the shuttle and improving the cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of the position of the ejection outlet on the existing shuttle;

[0018] Figure 2 is a perspective view of the shuttle in the first embodiment of the application;

[0019] Figure 3 is an exploded view of the shuttle in the first embodiment of the application;

[0020] Figure 4 is a schematic view of the first inlet on the shuttle bed in the first embodiment of the application;

[0021] Figure 5 is a schematic view of the first flow channel on the shuttle bed in the first embodiment of the application;

[0022] Figure 6 is a schematic view of the second inlet on the shuttle bed in the first embodiment of the application;

[0023] Figure 7is a schematic view of the second flow channel on the shuttle bed in Embodiment One of the present application;

[0024] Figure 8 is a schematic view of the second inlet on the shuttle bed in Embodiment Two of the present application;

[0025] Figure 9 is a schematic view of the second flow channel on the shuttle bed in Embodiment Two of the present application;

[0026] Figure 10 is a perspective view of the rotating shuttle in Embodiment Three of the present application;

[0027] Figure 11 is a schematic view of the moon circle in Embodiment Three of the present application;

[0028] Figure 12 is a schematic view of the position of the third flinging outlet in Embodiment Three of the present application;

[0029] Figure 13 is a schematic view of the structure of the guide in Embodiment Three of the present application.

[0030] Element number explanation:

[0031] 1 / 100 shuttle holder

[0032] 11 guide rail

[0033] 2 / 200 shuttle bed

[0034] 21 track

[0035] 22 inner annular surface

[0036] 23 outer annular surface

[0037] 3 / 300 / 301 moon circle

[0038] 301a extension

[0039] 4 / 400 shuttle skin

[0040] 5 first flow channel

[0041] 51 first inlet

[0042] 52 first passage

[0043] 53 first outlet

[0044] 6 second flow channel

[0045] 61 inner annular surface inlet

[0046] 611 guide surface

[0047] 62 track inlet

[0048] 63 second passage

[0049] 631 hypotenuse

[0050] 64 second outlet

[0051] 65 track inlet

[0052] 7 guide

[0053] 8 third flow channel

[0054] 81 third inlet

[0055] 82 third passage

[0056] 83 third outlet

[0057] 500 first fling outlet

[0058] 600 second fling outlet

[0059] 700 third fling outlet DETAILED DESCRIPTION

[0060] The specific embodiments of the present application will be further described with reference to the drawings. These embodiments are only used to illustrate the present application, and are not intended to limit the present application.

[0061] In the description of the present application, it should be noted that the terms "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0062] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] Example one

[0064] As Figure 2 and Figure 3As shown, the shuttle adopted by the first embodiment comprises a shuttle holder 1, a shuttle bed 2 arranged outside the shuttle holder 1 and rotatably connected with the shuttle holder 1, a moon circle 3 and a shuttle skin 4 mounted on the outer ring surface 23 of the shuttle bed 2. The outer ring surface of the shuttle holder 1 is provided with a guide rail 11, and the inner ring surface 22 of the shuttle bed 2 is provided with a track 21 in sliding connection with the guide rail 11. In operation, the shuttle bed 2 rotates at high speed, and under the action of centrifugal force, the excess lubricating oil input between the track 21 and the guide rail 11 will be thrown out along the radial direction of the shuttle bed 2 through the throw-out port on the shuttle bed 2.

[0065] The first embodiment is provided with two flow channels for lubricating oil on the shuttle bed 2, i.e. a first flow channel 5 and a second flow channel 6. As shown, Figures 1-5 The first flow channel 5 comprises a first inlet 51 extending in the radial direction of the shuttle bed 2, a first outlet 53 extending in the axial direction of the shuttle bed 2, and a first passage 52 for connecting the first inlet 51 and the first outlet 53. The first inlet 51 is machined on the basis of the first throw-out port 500 in the existing shuttle; the first passage 52 is opened on the outer ring surface 23 of the shuttle bed 2 and specifically in an arc shape; the shuttle skin 4 covers the outer side of the first passage 52 to prevent the lubricating oil from being directly thrown out from the first inlet 51 to the outside of the shuttle in the radial direction of the shuttle bed 2 without passing through the first passage 52.

[0066] In the working process of the shuttle, the lubricating oil is thrown out from the first inlet 51 under the action of centrifugal force, flows into the first passage 52 through the block of the shuttle skin 4, then flows to the first outlet 53, and finally is thrown out from the first outlet 53 in the axial direction of the shuttle bed 2, thereby avoiding the problem of fabric contamination caused by the radial throwing out of lubricating oil in the prior art.

[0067] As shown, Figures 1-2 , Figures 6-7As shown, the second flow channel 6 includes a second inlet extending radially along the shuttle bed 2, a second outlet 64 extending axially along the shuttle bed 2, and a second passage 63 for connecting the second inlet and the second outlet 64. The second inlet is machined on the basis of the second fling outlet 600 in the prior art, including an inner annular face inlet 61 formed on the inner annular face 22, and a track inlet 62 formed in the track 21. A guide surface 611 is provided near the inner annular face inlet 61, which is a slope extending along the tangent direction of the inner annular face 21. Such arrangement can help the lubricating oil adhering to the inner annular face 21 to be flung out of the inner annular face inlet 61 along the guide surface 611 and into the second passage 63. Similarly, the lubricating oil adhering to the track 21 can be flung out of the track inlet 62 and into the second passage 63. The track inlet 62 is specifically a long hole, the height of which does not exceed half the height of the track 21, so as to avoid weakening the strength of the track 21 due to excessively large size of the long hole. Meanwhile, the long hole has a large length, which can allow sufficient lubricating oil to pass through. The second passage 63 is formed on the outer annular face 23 of the shuttle bed 2, and one side thereof is preferably provided with a bevel 631, which makes the width of the second passage 63 at the second inlet smaller than that at the second outlet 64. The bevel 631 helps the lubricating oil to flow to the second outlet 64, preventing the lubricating oil in the second passage 63 from flowing back to the second inlet. The lunula 3 covers the outside of the second passage 63, preventing the lubricating oil from being flung out of the second inlet along the radial direction of the shuttle bed 2 directly to the outside of the shuttle.

[0068] During the operation of the shuttle, the lubricating oil is flung out of the second inlet under the action of centrifugal force, flows into the second passage 63 through the block of the lunula 3, and is guided by the bevel 631 to flow to the second outlet 64, and finally is flung out of the second outlet 64 along the axial direction of the shuttle bed 2, thereby avoiding the problem of fabric contamination caused by the lubricating oil being flung out along the radial direction in the prior art.

[0069] To prevent the lubricating oil from being flung out completely, preferably, oil absorption members (such as oil cotton) can be arranged in the first flow channel 52 and the second flow channel 63 to retain the lubricating oil, so as to realize repeated lubrication of the connection between the shuttle holder 1 and the shuttle bed 2.

[0070] In addition to forming the first passage 52 and the second passage 63 on the outer annular face 23 by the above-mentioned subtractive method, a guide member (the specific structure of the guide member can be referred to in Example Three) can also be arranged by an additive method, so that the first flow channel or the second flow channel is arranged in the guide member, and the first inlet or the second inlet is connected to the fling outlet on the shuttle bed 2, which can also achieve the same technical effect.

[0071] Example Two

[0072] As Figure 8 and Figure 9As shown, the difference between Embodiment 2 and Embodiment 1 is that the track inlet 65 is a circular hole, the diameter of which is smaller than the height of the track 21. This ensures the continuity of the track 21, avoids affecting the sliding connection between the guide rail and the track 21, and prevents vibration when the shuttle bed 2 rotates relative to the shuttle frame 1. Multiple circular holes can be used, and a certain distance must be maintained between adjacent holes to avoid weakening the strength of the track 21.

[0073] Example 3

[0074] Based on Example 1 or Example 2, such as Figures 10-13 As shown, the shuttle 2 in Embodiment 3 also includes a guide member 7, and a third flow channel 8 is disposed in the guide member 7, including a third inlet 81 extending radially along the shuttle 2, a third outlet 83 extending axially along the shuttle 2, and a third channel 82 disposed inside the guide member 7 for connecting the third inlet 81 and the third outlet 83. The third inlet 81 is connected to the ejector outlet on the shuttle 2 (corresponding to the third ejector outlet 700 in the existing rotary shuttle). Those skilled in the art can also, as needed, provide a slope near the third inlet 81 to guide lubricating oil from the ejector outlet into the third inlet 81.

[0075] During the operation of the rotary hook, the lubricating oil is thrown out from the outlet under the action of centrifugal force, enters the third inlet 81, flows through the third channel 82, and flows to the third outlet 83. Finally, it is thrown out from the third outlet 83 along the axial direction of the rotary hook 2, thereby avoiding the fabric contamination problem caused by the radial throwing out of the lubricating oil in the prior art.

[0076] Meanwhile, in Embodiment 3, one side of the moon ring 301 is provided with an extension 301a. The extension 301a can increase the width of the moon ring 301 in the axial direction of the shuttle bed 2, which in turn helps to increase the length of the second channel 63 (i.e., increase the distance between the second inlet and the second outlet 64), making the distance between the second outlet 64 and the components located between the shuttle and the fabric larger, ensuring that the lubricating oil thrown out by the second outlet 64 will not fall onto the fabric.

[0077] The present invention also provides a sewing machine that prevents lubricating oil from contaminating fabric, including the aforementioned rotary hook.

[0078] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A shuttle for preventing contamination of a cloth by lubricating oil, comprising a shuttle frame and a shuttle bed rotatably connected to said shuttle frame, characterized in that, The shuttle bed is provided with a plurality of flow channels for lubricating oil, the flow channels include an inlet extending along the radial direction of the shuttle bed, an outlet extending along the axial direction of the shuttle bed, and a channel for connecting the inlet and the outlet; a lunette or a shuttle skin is installed on the outer ring surface of the shuttle bed, the lunette or the shuttle skin covers the outside of the channel to prevent the lubricating oil from being thrown to the outside of the spinning shuttle along the radial direction of the shuttle bed; the shuttle bed further includes a guide, the flow channels are arranged in the guide, and the inlet is connected with a throwing outlet on the shuttle bed; When the shuttle bed rotates, the thrown lubricating oil enters the channel through the inlet and is finally thrown to the outside of the spinning shuttle through the outlet.

2. The rotary hook according to claim 1, characterized in that A lunette is installed on the outer ring surface of the shuttle bed, and the lunette is provided with an extension on one side.

3. The rotary hook according to claim 1, wherein The channel is arranged on the outer ring surface of the shuttle bed.

4. The rotary hook according to claim 1 or 3, characterized in that A guide surface is further arranged near the inlet, and the guide surface extends along the tangential direction of the inner ring surface of the shuttle bed.

5. The rotary hook according to claim 1 or 3, characterized in that The inlet includes an inner ring surface inlet arranged on the inner ring surface of the shuttle bed and a track inlet arranged in the track of the shuttle bed.

6. The rotary hook according to claim 5, wherein The track inlet is a round hole or a long hole.

7. The rotary hook according to claim 3, wherein One side of the channel is provided with a bevel.

8. A sewing machine for preventing contamination of cloth by lubricating oil, characterized by comprising: The spinning shuttle comprises the shuttle bed according to any one of claims 1-7.

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