Outer shuttle, rotating shuttle and sewing machine

Abstract

The utility model relates to an outer shuttle, a rotating shuttle and a sewing machine, the outer shuttle comprises a base structure, the base structure is provided with a rotating shuttle shaft mounting hole, a lubricating oil containing space and a lubricating oil communication channel, and the lubricating oil communication channel is communicated with the lubricating oil containing space and the exterior of the base structure; the moon ring structure is arranged on the base structure and extends towards one side far away from the rotating shuttle shaft; an outlet of the lubricating oil communicating channel is located in the side, away from the rotating shuttle shaft, of the base structure and located in the moon ring structure. According to the technical scheme, the problem that in the prior art, the service cycle of a rotating shuttle is short is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of lubrication of sewing machine rotating shuttles, and more particularly, to an outer shuttle, a rotating shuttle, and a sewing machine. Background Art

[0002] A sewing machine is a machine that forms one or more stitches on a sewing material with one or more sewing threads, so as to interweave or stitch together one or more layers of sewing materials. Sewing machines include sewing machines, stitching machines, embroidery machines, quilting machines, etc.

[0003] As one of the key components of a sewing machine, the rotating shuttle has a relatively high operating speed, about 1000 revolutions per minute. In order to improve the service life of the rotating shuttle, some existing technologies lubricate the rotating shuttle by dripping oil with an oil cotton. However, it is relatively difficult to control the amount of oil added in this lubrication method. If the amount of oil added is small, it will not work for lubricating the rotating shuttle, and if the amount of oil added is large, it will contaminate the item to be sewn. Therefore, in order to ensure the quality of the item to be sewn, some rotating shuttles are not lubricated, which results in relatively fast wear of the guide rail of the rotating shuttle during use and a relatively short service life of the rotating shuttle. Summary of the Utility Model

[0004] The present application provides an outer shuttle, a rotating shuttle, and a sewing machine to solve the problem of the relatively short service life of the rotating shuttle in the prior art.

[0005] An outer shuttle according to the present application includes: a base structure having a rotating shuttle shaft mounting hole, a lubricating oil accommodation space, and a lubricating oil communication channel, the lubricating oil communication channel communicating the lubricating oil accommodation space with the outside of the base structure; a moon ring structure provided on the base structure and extending away from the rotating shuttle shaft; and an outlet of the lubricating oil communication channel located on a side of the base structure away from the rotating shuttle shaft and inside the moon ring structure.

[0006] Further, the lubricating oil accommodation space is located circumferentially outside the rotating shuttle shaft mounting hole.

[0007] Further, an inlet of the lubricating oil communication channel is located on a side of the lubricating oil accommodation space away from the rotating shuttle shaft mounting hole.

[0008] Further, the inner wall surface of the lubricating oil accommodation space gradually inclines towards the moon ring structure from a side away from the inlet of the lubricating oil communication channel to a side close to the inlet of the lubricating oil communication channel.

[0009] Further, the inner wall surface of the lubricating oil accommodation space is an arc surface, or the inner wall surface of the lubricating oil accommodation space is an inclined surface.

[0010] Further, when the inner wall surface of the lubricating oil accommodation space is an inclined surface, the angle range of the inclination angle is between 0.6° and 10°.

[0011] Further, the lubricating oil communication channel is parallel to the axis of the outer shuttle, or in the direction from the inlet of the lubricating oil communication channel to the outlet of the lubricating oil communication channel, the lubricating oil communication channel inclines towards the direction close to the rotating shuttle shaft.

[0012] Further, the plane on the side of the base structure away from the rotating shuttle shaft has a plurality of concave grooves.

[0013] According to another aspect of the present application, there is also provided a rotating shuttle, which includes an outer shuttle and an inner shuttle. The inner shuttle cooperates with the outer shuttle, and the outer shuttle is the above-mentioned outer shuttle.

[0014] According to another aspect of the present application, there is also provided a sewing machine, which includes a sewing machine main body and an outer shuttle. The outer shuttle is installed on the sewing machine main body, and the outer shuttle is the above-mentioned outer shuttle.

[0015] Applying the technical solution of the present application, by using the characteristics of the base structure itself to set the lubricating oil accommodation space, the lubricating oil communication channel can transport the lubricating oil in the lubricating oil accommodation space to between the outer shuttle and the inner shuttle, which can greatly reduce the friction between the outer shuttle and the inner shuttle, reduce wear, and improve the service life of the rotating shuttle. The technical solution of the present application effectively solves the problem that the service life of the rotating shuttle in the prior art is relatively short. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It shows a three-dimensional structure schematic diagram of the outer shuttle in the embodiment of the present application;

[0019] Figure 2 It shows Figure 1 a three-dimensional structure schematic diagram of the outer shuttle from another angle;

[0020] Figure 3 It shows Figure 1 a cross-sectional schematic diagram of the outer shuttle;

[0021] Figure 4 It shows Figure 1 a top view schematic diagram of the outer shuttle;

[0022] Figure 5 It shows Figure 1Schematic diagram of the inner wall surface of the lubricating oil containing cavity of the outer shuttle.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 10. Base structure; 11. Bobbin winder shaft mounting hole; 12. Lubricating oil containing space; 13. Lubricating oil communication channel; 14. Concave groove; 15. Oil injection hole; 20. Moon ring structure. Detailed implementation mode

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] It should be pointed out that the following detailed description is illustrative and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0027] For the sake of convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures" afterwards. Thus, the exemplary term "above..." can include both orientations of "above..." and "below...". The device can also be positioned or rotated in other different ways by 90 degrees or in other orientations, and corresponding explanations are made for the spatial relative descriptions used here.

[0028] As Figures 1 to 5 shown, the outer shuttle of this embodiment includes: a base structure 10 and a moon ring structure 20. The base structure 10 has a bobbin winder shaft mounting hole 11, a lubricating oil containing space 12 and a lubricating oil communication channel 13, and the lubricating oil communication channel 13 communicates the lubricating oil containing space 12 and the outside of the base structure 10. The moon ring structure 20 is arranged on the base structure 10 and extends to the side away from the bobbin winder shaft. The outlet of the lubricating oil communication channel 13 is located on the side of the base structure 10 away from the bobbin winder shaft and is located inside the moon ring structure 20.

[0029] Applying the technical solution of this embodiment, a lubricating oil accommodation space 12 is set by using the characteristics of the base structure 10 itself. The lubricating oil communication channel 13 can convey the lubricating oil in the lubricating oil accommodation space 12 between the outer shuttle and the inner shuttle. In this way, the friction between the outer shuttle and the inner shuttle can be greatly reduced, wear can be reduced, and the service life of the rotating shuttle can be improved. The technical solution of this embodiment effectively solves the problem that the service life of the rotating shuttle in the prior art is relatively short.

[0030] It should be noted that the outlet of the lubricating oil communication channel 13 is located on the side of the base structure 10 away from the rotating shuttle shaft and inside the moon ring structure 20. In this way, it can effectively prevent the lubricating oil from being thrown to other positions under the action of centrifugal force, resulting in waste and pollution of the lubricating oil. The diameter of the lubricating oil communication channel 13 is set according to specific conditions to ensure an appropriate amount of lubricating oil.

[0031] The base structure 10 has a set screw hole, and the set screw is fixed to the rotating shuttle shaft through the set screw hole. The base structure 10 also has an oil injection hole 15, and the oil injection hole 15 is located on the side wall of the base structure 10. The oil injection hole 15 is communicated with the lubricating oil accommodation space 12. The oil injection hole 15 is located on the side wall of the base structure 10, and the oil injection hole 15 is blocked by a rubber plug. Or the inner wall of the oil injection hole 15 has internal threads, and the rubber plug has external threads adapted to the internal threads. The rubber plug and the internal threads of the oil injection hole 15 are thread - fitted, and the rubber plug is deformed for sealing. In this way, the sealing effect is better. The thread pitch and pitch can be set according to the sealing situation.

[0032] As Figure 3 shown, in the technical solution of this embodiment, the lubricating oil accommodation space 12 is located on the circumferential outer side of the rotating shuttle shaft mounting hole 11. Such a structure is compact and does not cause much damage to the strength of the outer shuttle. The extension axis of the lubricating oil accommodation space 12 is also arc - shaped. It should be noted that the lubricating oil accommodation space 12 can have structures such as steps inside. In this way, the strength of the base structure 10 can be guaranteed. For example, the thickness should be larger near the set screw hole to ensure the strength of the base structure 10.

[0033] As Figure 3As shown, in the technical solution of this embodiment, the inlet of the lubricating oil communication channel 13 is located on the side of the lubricating oil accommodating space 12 away from the bobbin shaft mounting hole 11, that is, the inlet of the lubricating oil communication channel 13 is located outside the lubricating oil accommodating space 12. The outer shuttle rotates under the action of the bobbin shaft. The lubricating oil located in the lubricating oil accommodating space 12 moves towards a position away from the bobbin shaft under the action of centrifugal force. The inlet of the lubricating oil communication channel 13 is located on the side of the lubricating oil accommodating space 12 away from the bobbin shaft mounting hole 11, so that the lubricating oil can easily move through the lubricating oil communication channel 13 and perform lubrication. Even when the amount of lubricating oil used gradually decreases, even when there is less lubricating oil in the lubricating oil accommodating space 12, it can still play a role in lubricating the bobbin.

[0034] As Figure 5 shown, in the technical solution of this embodiment, the inner wall surface of the lubricating oil accommodating space 12 gradually inclines towards the moon ring structure 20 from the side away from the inlet of the lubricating oil communication channel 13 to the side close to the inlet of the lubricating oil communication channel 13. The above structure enables the lubricating oil, under the action of centrifugal force, to be provided with a decomposing acting force by the structure inside the lubricating oil accommodating space 12, making it easier for the lubricating oil to enter the lubricating oil communication channel 13. Analyzing from the perspective of force composition and decomposition, if the upper and lower wall surfaces of the lubricating oil accommodating space 12 are both planes perpendicular to the axis of the outer shuttle, the acting force received by the lubricating oil is along the radial direction of the upper shuttle. The inner wall of the lubricating oil accommodating space 12 in this embodiment is an inclined surface. In this way, when the lubricating oil is under the action of centrifugal force, it impacts the inner wall surface of the lubricating oil accommodating space 12, and the inner wall surface of the lubricating oil accommodating space 12 exerts a reverse acting force on the lubricating oil, and the component force of the reverse acting force provides the power for the lubricating oil to move towards the lubricating oil communication channel 13.

[0035] As Figure 5 shown, in the technical solution of this embodiment, the inner wall surface of the lubricating oil accommodating space 12 is an inclined surface. Such a structure is easy to process. It should be noted that as another implementation manner, the inner wall surface of the lubricating oil accommodating space 12 is an arc surface, and the above structure has a better effect on the lubricating oil. The outer shuttle in this embodiment can be processed by performing finish machining after casting, or after welding the base structure 10 and the moon ring structure 20 and other parts into one body by welding, and then performing turning finish machining, etc. Whether using the above two processing techniques or other processing techniques, the base structure 10 is an integral structure, so that it can be ensured that the lubricating oil is not likely to leak. Even if the base structure 10 has an oil injection hole 15, it is relatively easy to seal the oil injection hole 15.

[0036] As Figure 5As shown, in the technical solution of this embodiment, when the inner wall surface of the lubricating oil accommodation space 12 is an inclined surface, the angle range of the inclination angle is between 0.6° and 10°. The above-mentioned inclination angle can not only ensure the strength of the base structure 10, but also ensure that the volume of the lubricating oil accommodation space 12 is relatively large and can hold more lubricating oil. It should be noted that the inclination angles of the upper wall surface and the lower wall surface of the lubricating oil accommodation space 12 can be different, such as Figure 5 As shown, the inclination angle of the upper wall surface of the lubricating oil accommodation space 12 is 7°, and the inclination angle of the lower wall surface of the lubricating oil accommodation space 12 is 2°. As other embodiments, the inclination angle can be constant or variable. For example, the inclination angle of the part of the upper wall surface close to the rotating shuttle shaft can be 2°, and the inclination angle of the part close to the outside can be 6°. When the inner wall surface of the lubricating oil accommodation space 12 is an arc surface, the tangent angle of the arc surface is variable. In addition, the lubricating oil communication channel 13 is one or more.

[0037] Such as Figure 4 and Figure 5 As shown, in the technical solution of this embodiment, the lubricating oil communication channel 13 is parallel to the axis of the outer shuttle. Such a structure has a lower processing cost and is convenient to use. As other embodiments, in the direction from the inlet of the lubricating oil communication channel 13 to the outlet of the lubricating oil communication channel 13, the lubricating oil communication channel 13 is inclined towards the rotating shuttle shaft, that is, the lubricating oil communication channel 13 inclines inwards. In this way, when the lubricating oil enters between the outer shuttle and the inner shuttle, the lubricating oil can flow as much as possible towards the position close to the rotating shuttle shaft. The rotating shuttle moves outwards under the action of centrifugal force, so that a larger lubricating area is ensured.

[0038] Such as Figure 4 As shown, in the technical solution of this embodiment, the plane on the side of the base structure 10 away from the rotating shuttle shaft has a plurality of concave grooves 14. The setting of the concave grooves 14 plays a better guiding role for the lubricating oil, and can guide the lubricating oil towards the rotating shuttle shaft, so that the path of the lubricating oil flowing through is longer. The concave grooves 14 are meandering, starting from the outlet of the lubricating oil communication channel 13, meandering inwards, and then meandering outwards. In this way, the lubricating range is wide, and it is avoided that under the action of centrifugal force, more lubricating oil accumulates on the outside and the lubricating effect on the inside is not good. It should be noted that the surface where the concave grooves 14 are located is a plane, the depth of the concave grooves 14 can be 0.2 mm, and the width can be 0.5 mm.

[0039] This application also provides a rotating shuttle. The rotating shuttle includes an outer shuttle and an inner shuttle. The inner shuttle cooperates with the outer shuttle, and the outer shuttle is the above-mentioned outer shuttle. The above-mentioned rotating shuttle can achieve a lubricating effect through the setting of its own structure, and such a rotating shuttle has a longer service life.

[0040] According to another aspect of the present application, a sewing machine is further provided. The sewing machine includes a sewing machine main body and an outer bobbin. The outer bobbin is mounted on the sewing machine main body, and the outer bobbin is the above-mentioned outer bobbin. The sewing machine main body includes a rotating bobbin shaft assembly. The rotating bobbin shaft assembly includes a rotating bobbin shaft axial movement structure, a rotating bobbin shaft structure, and a bracket shaft structure. The rotating bobbin shaft axial movement structure is connected to the rotating bobbin shaft structure, and the bracket shaft structure cooperates with the rotating bobbin shaft structure. The rotating bobbin shaft structure includes a splined rotating bobbin shaft and a splined bushing. The splined bushing is sleeved on the circumferential outer side of the splined rotating bobbin shaft. The splined rotating bobbin shaft has a hollow first lubricating oil accommodating space and a first lubricating oil communication channel. The first lubricating oil communication channel is provided on the side wall of the splined rotating bobbin shaft and communicates the first lubricating oil accommodating space with the outside of the splined rotating bobbin shaft. The outlet of the first lubricating oil communication channel of the spline is located at the spline shaft section of the splined rotating bobbin shaft, and the splined bushing is correspondingly arranged at the spline shaft section of the splined rotating bobbin shaft.

[0041] Applying the technical solution of this embodiment, the rotating bobbin shaft axial movement structure can drive the rotating bobbin shaft structure to move axially along the splined rotating bobbin shaft. The rotation of the splined rotating bobbin shaft drives the splined bushing to rotate. There is a large acting force between the splined rotating bobbin shaft and the splined bushing and there will be relative movement during startup, so lubrication is required. The lubricating oil in the first lubricating oil accommodating space can lubricate between the splined rotating bobbin shaft and the splined bushing through the first lubricating oil communication channel under the action of centrifugal force. In this way, the friction and wear between the splined rotating bobbin shaft and the splined bushing can be reduced. The above structure does not require lubricating oil to be transported over a long distance through an oil sump, and the lubrication is relatively stable.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0044] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An outer shuttle, characterized in that, Comprising: A base structure (10) having a bobbin race shaft mounting hole (11), a lubricating oil accommodation space (12), and a lubricating oil communication passage (13), the lubricating oil communication passage (13) communicating the lubricating oil accommodation space (12) and the outside of the base structure (10); A moon ring structure (20) provided on the base structure (10) and extending away from the bobbin race shaft; The outlet of the lubricating oil communication passage (13) is located on the side of the base structure (10) away from the bobbin race shaft and inside the moon ring structure (20).

2. The outer shuttle according to claim 1, characterized in that, The lubricating oil accommodation space (12) is located circumferentially outside the bobbin race shaft mounting hole (11).

3. The outer shuttle according to claim 1, characterized in that The inlet of the lubricating oil communication passage (13) is located on the side of the lubricating oil accommodation space (12) away from the bobbin race shaft mounting hole (11).

4. The outer shuttle according to claim 1, characterized in that, The inner wall surface of the lubricating oil accommodation space (12) gradually inclines towards the moon ring structure (20) from the side away from the inlet of the lubricating oil communication passage (13) to the side close to the inlet of the lubricating oil communication passage (13).

5. The outer shuttle according to claim 4, characterized in that, The inner wall surface of the lubricating oil accommodation space (12) is an arc surface, or the inner wall surface of the lubricating oil accommodation space (12) is an inclined surface.

6. The outer shuttle according to claim 5, characterized in that, When the inner wall surface of the lubricating oil accommodation space (12) is an inclined surface, the angle range of the inclination angle is between 0.6° and 10°.

7. The outer shuttle according to claim 1, characterized in that, The lubricating oil communication passage (13) is parallel to the axis of the outer shuttle, or in the direction from the inlet of the lubricating oil communication passage (13) to the outlet of the lubricating oil communication passage (13), the lubricating oil communication passage (13) inclines towards the bobbin race shaft.

8. The outer shuttle according to claim 1, characterized in that, The plane on the side of the base structure (10) away from the bobbin race shaft has a plurality of concave grooves.

9. A rotating shuttle, characterized in that, The bobbin race includes an outer shuttle and an inner shuttle, the inner shuttle cooperating with the outer shuttle, and the outer shuttle is the outer shuttle according to any one of claims 1 to 8.

10. A sewing machine, characterized in that, The sewing machine includes a sewing machine main body and an outer shuttle, the outer shuttle being mounted on the sewing machine main body, and the outer shuttle is the outer shuttle according to any one of claims 1 to 8.

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