An inner shuttle pressure plate and a rotating shuttle

Abstract

This application relates to an inner shuttle pressure plate and a rotating shuttle, including a pressure plate body in a semi-circular arc shape. One end of the pressure plate body is provided with a slantingly protruding edge tip. One side of the edge tip is an inclined side, and the other side is a flat side. The flat side is flush with one side of the pressure plate body. A "V"-shaped wire spring is arranged on the side of the edge tip away from the pressure plate body. The wire spring includes a first deformed wire, a second deformed wire, and a pointed corner part. The first deformed wire abuts against the flat side of the edge tip, the second deformed wire is suspended on the inclined side of the edge tip, and the pointed corner part is suspended at the intersection of the flat side and the inclined side. This application has the characteristics of reducing the probability of the occurrence of loose pick and making the stitch more flat, etc.

Description

Technical Field

[0001] The present application relates to the technical field of textile equipment, and in particular to an inner shuttle pressure plate and a rotating shuttle. Background Art

[0002] At present, rotating shuttles are widely used in various sewing machines and are also essential functional accessory products for sewing machines to achieve sewing. The rotating shuttle of a sewing machine is used to hook the upper thread on the sewing machine needle, rotate it, and then bypass the bobbin thread in the bobbin of the inner shuttle frame of the rotating shuttle to form a stitch. The rotating shuttle is composed of an outer shuttle frame and an inner shuttle frame. The outer shuttle frame and the inner shuttle frame are matched through the guide groove in the outer shuttle frame and the guide rail on the inner shuttle frame. During operation, the outer shuttle frame rotates on the inner shuttle frame.

[0003] The working principle of the rotating shuttle is generally that after the sewing machine needle rises a certain distance, the tip of the shuttle bed of the rotating shuttle begins to hook the thread loop. After the tip of the shuttle hooks the thread loop, it continues to rotate. When the thread loop is sent to the guide rail opening of the shuttle frame, the thread loop is hooked by the thread dividing hook of the shuttle frame. At this time, the sewing machine needle should rise about 2 mm from the lower limit position. The thread dividing hook on the shuttle frame should leave time for the end of the thread loop to move to the back of the guide rail when the thread loop is about to approach. The angle between the thread dividing hook and the movement axis of the sewing machine needle is about 50°. The thread loop is hooked at 45° on the upper edge of the convex surface of the outer frame of the shuttle bed tip and continues to rotate. The end of the thread loop is hooked on the thread dividing hook. In order to make the thread loop smoothly slide onto the surface of the shuttle frame, the bevel edge at the tail of the wire guide plate pushes the end of the thread loop outward. The rear part of the thread loop is hooked by the thread dividing hook of the shuttle frame and slides down towards the bottom of the shuttle frame. At this moment, the sewing machine needle exits from the rotating shuttle mechanism, and the thread loop slides out from the bottom of the shuttle frame. When the tip of the shuttle can turn 180°, the thread take-up lever rises to take up the remaining part of the thread sent down by the thread take-up lever before. The tip of the shuttle hooks the thread loop and continues to rotate. The front half of the thread loop is under the wire guide plate. After passing through the 45° inclined surface of the outer frame convex surface, the edge of the moving wire guide plate gradually rises above the shuttle frame and pushes the front half of the thread loop outward. The rear half of the thread loop is hooked by the thread dividing hook of the shuttle frame, and the thread loop is separated into front and back parts. Finally, the front and back of the thread loop pass over the shuttle frame, the bobbin thread is sleeved in the middle, and the thread loop is tightened by the thread take-up lever to form a stitch.

[0004] The above-mentioned related technical solutions have the following defects: The thread passing part of the shuttle frame is an inclined plane, and the overall structure is rigid. Under a certain tension, the thread can pass over the inclined plane of the shuttle frame at a uniform speed. However, the thickness of the thread itself cannot be exactly the same, resulting in the thread may stagnate when passing over the inclined plane of the shuttle frame. Subsequently, as the tension gradually increases, the thread will suddenly relax and quickly pass over the inclined plane, causing the formed stitch to have loose pick, that is, the thread between adjacent two needle holes is not tightened. Summary of the Invention

[0005] In order to reduce the occurrence of loose pick phenomenon and make the stitch more flat, the present application provides an inner shuttle pressure plate and a rotating shuttle.

[0006] In a first aspect, the present application provides an inner shuttle pressure plate, which is specifically achieved through the following technical solutions:

[0007] An inner shuttle pressure plate includes a pressure plate body in a semi-circular arc shape. One end of the pressure plate body is provided with a slantingly protruding edge tip. One side edge of the edge tip is an inclined edge, and the other side edge is a flat edge. The flat edge is flush with one side edge of the pressure plate body. A "V"-shaped wire spring is provided on the side of the edge tip away from the pressure plate body. The wire spring includes a first deformed wire, a second deformed wire, and a pointed corner portion. The first deformed wire abuts against the flat edge of the edge tip, the second deformed wire is suspended on the inclined edge of the edge tip, and the pointed corner portion is suspended at the intersection of the flat edge and the inclined edge.

[0008] By adopting the above technical solutions, one end of the pressure plate body is an edge tip, and one side edge of the edge tip is an inclined edge, which has the same effect as the inclined surface of the shuttle frame. A wire spring is arranged outside the shuttle tip. The second deformed wire of the wire spring is suspended outside the inclined edge, so that the cord will abut against the second deformed wire and slide over. When the diameter of the passing cord changes, the tension force gradually increases. At this time, the force received by the second deformed wire increases, causing the second deformed wire to have a tendency to deform and move towards the inclined edge. As the second deformed wire deforms, the tension force of the cord will decrease, and then the cord will continue to pass over the second deformed wire at a constant speed, and the second deformed wire will recover its deformation. In this solution, the wire spring can adjust the tension force of the cord to ensure that the cord can pass through at a constant speed, thereby reducing the occurrence of slack and tightness phenomena and making the stitch more flat.

[0009] Preferably, both the first deformed wire and the second deformed wire are in an arc-shaped bent state.

[0010] By adopting the above technical solutions, both the first deformed wire and the second deformed wire are in an arc shape. On the one hand, it makes the outer shape of the wire spring similar to the outer shape of the rotating shuttle, so that the rotating shuttle equipped with this inner shuttle pressure plate can be adapted to a variety of devices. On the other hand, as the first deformed wire and the second deformed wire on the wire spring gradually approach each other, the passing speed of the cord will increase exponentially. And by bending the wire spring inward, the passing speed of the cord becomes more uniform, thereby further reducing the probability of the occurrence of slack and tightness phenomena.

[0011] Preferably, the bending rate of the first deformed wire is greater than the bending rate of the second deformed wire.

[0012] By adopting the above technical solutions, the bending rate of the first deformed wire is greater than the bending rate of the second deformed wire, making the entire wire spring twisted at the pointed corner portion, thereby strengthening the deformation elasticity of the second deformed wire. After long-term use, the wire spring can still maintain a good use effect and improve the service life of the wire spring.

[0013] Preferably, the flat edge of the edge tip is provided with a first fixing groove for inserting and fixing one end of the first deformable steel wire, and the outer end surface of the pressure plate body is provided with a second fixing groove for inserting and fixing the second deformable steel wire.

[0014] By adopting the above technical solution, the first fixing groove is opened on the flat edge of the edge tip, and the second fixing groove is opened on the outer end surface of the pressure plate body, so that the two ends of the wire spring are respectively fixed on planes in different directions. When the second deformed steel wire contacts the rope, the force received by the second deformed steel wire is in two directions, and is respectively in the directions of the two end surfaces fixed at the two ends of the corresponding wire spring. When the rotary shuttle is working, the efficiency is faster. This setting can make the wire spring be used for a long time under long-term high-frequency working intensity, reducing the chance of damage to the wire spring.

[0015] Preferably, the first deformable steel wire, the second deformable steel wire and the pointed corner portion are integrally bent and formed, and the bending angle is smaller than the installation angle.

[0016] By adopting the above technical solution, when installing the wire spring, it is necessary to bend the first deformed steel wire and the second deformed steel wire to both sides so that an angle is formed between the first deformed steel wire and the second deformed steel wire. The angle formed at this time is smaller than the angle between the first deformed steel wire and the second deformed steel wire after the installation of the wire spring is completed, so that the wire spring is in a taut state after the installation is completed, thereby strengthening the force required for the deformation of the second deformed steel wire, so that the wire spring can be used for a long time under long-term high-frequency working intensity, reducing the probability of damage to the wire spring.

[0017] Preferably, the edge tip is inclined on the flat edge to open an extended arc groove connected to the first fixed groove, the extended arc groove is from shallow to deep at one end away from the first fixed groove to one end close to the first fixed groove, and the first deformable steel wire is embedded in the extended arc groove.

[0018] By adopting the above technical solution, the first deformed steel wire is embedded in the extended arc groove, so that when the second deformed steel wire is subjected to force, the first deformed steel wire can abut against the inner wall of the extended arc groove, thereby supporting the steel wire spring, reducing the looseness caused by long-term use of the steel wire spring under long-term high-frequency working intensity, and thereby reducing the probability of loosening.

[0019] In the second aspect, the present application provides a rotary hook, which is specifically realized by the following technical solutions:

[0020] A rotary shuttle comprises an inner shuttle and an outer shuttle coaxially rotatably connected to the outer peripheral side of the inner shuttle, wherein a limiting groove for inserting the first deformed steel wire end is provided at the side end of the outer shuttle.

[0021] By adopting the above technical solution, one end of the first deformed wire is inserted into the first fixing groove, and a limiting groove is formed in the side end of the second mounting strip, so that the first deformed wire can pass through the first fixing groove and then be inserted into the limiting groove, further fixing the pressing plate body and the outer shuttle, so that the pressing plate body will not vibrate in the axial direction of the rotating shuttle, thus ensuring the stability of the rotating shuttle during operation.

[0022] Preferably, the limiting groove is a through groove, and the limiting groove communicates with the inner and outer peripheral end faces of the outer shuttle.

[0023] By adopting the above technical solution, the limiting groove is arranged as a through groove and communicated to both end faces of the outer shuttle, so that when producing the rotating shuttle, the pressing plate body and the wire spring can be installed first, and then the inner shuttle pressing plate and the outer shuttle can be fixed, which is more convenient.

[0024] Preferably, a fixing ring is formed by bending the end of the second deformed wire away from the pointed corner portion, and a fixing screw is inserted into the fixing ring. The fixing screw sequentially passes through the pressing plate body and the outer shuttle and fixes the fixing ring.

[0025] By adopting the above technical solution, the fixing screw passes through the fixing ring and then sequentially passes through the pressing plate body and the outer shuttle, thereby fixing one end of the second deformed wire, and at the same time fixing the pressing plate body and the outer shuttle, thereby reducing the connecting parts required for the installation and fixation of the entire rotating shuttle, reducing costs and making the installation more convenient.

[0026] Preferably, a positioning block for aligning with the fixing screw is arranged on the inner peripheral wall of the pressing plate body, and a positioning groove for inserting the positioning block is formed on the outer peripheral wall of the outer shuttle.

[0027] By adopting the above technical solution, a positioning block is arranged on the inner peripheral wall of the pressing plate body, and a positioning groove is formed on the outer peripheral wall of the outer shuttle at the same time. When installing the pressing plate body, the positioning block is aligned with the positioning groove, and at this time, it can be directly installed and fixed without moving the pressing plate body during the installation process, making the entire installation process more convenient.

[0028] In summary, the beneficial technical effects of the present application are:

[0029] 1. One end of the pressure plate body is a sharp edge, and one side of the sharp edge is an inclined edge. The inclined edge has the same function as the inclined surface of the shuttle frame. A wire spring is arranged on the outside of the shuttle tip. The second deformation wire of the wire spring is suspended on the outside of the inclined edge, so that the rope will abut against the second deformation wire to slide over. When the diameter of the passed rope changes, the tension gradually increases. At this time, the force exerted on the second deformation wire increases, so that the second deformation wire tends to move toward the inclined edge and deform. As the second deformation wire deforms, the tension of the rope will decrease, and then continue to pass over the second deformation wire at a uniform speed, while the second deformation wire recovers its deformation. The wire spring can adjust the tension of the rope to ensure that the rope can pass at a uniform speed, thereby reducing the occurrence of loose picking and making the stitch smoother.

[0030] 2. The first deformed steel wire and the second deformed steel wire are both arc-shaped. On the one hand, the shape of the steel wire spring is similar to that of the rotary hook, so that the rotary hook equipped with the inner hook pressure plate can be adapted to a variety of equipment. On the other hand, as the first deformed steel wire and the second deformed steel wire on the steel wire spring gradually approach each other, the speed at which the rope passes will increase exponentially, and the steel wire spring is bent inward, so that the speed at which the rope passes is closer to a uniform speed, thereby further reducing the probability of loose picking.

[0031] 3. When installing the wire spring, it is necessary to bend the first deformed steel wire and the second deformed steel wire to both sides so that an angle is formed between the first deformed steel wire and the second deformed steel wire. The angle formed at this time should be smaller than the angle between the first deformed steel wire and the second deformed steel wire after the wire spring is installed. This makes the wire spring in a taut state after the installation is completed, thereby increasing the force required for the deformation of the second deformed steel wire, allowing the wire spring to be used for a long time under long-term high-frequency working intensity, reducing the chance of damage to the wire spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the rotary hook;

[0033] Figure 2 It is a schematic diagram of the partial explosion of the rotary hook;

[0034] Figure 3 It is a structural schematic diagram of the pressing plate body;

[0035] Figure 4 Schematic diagram of the explosion of the inner shuttle pressure plate.

[0036] In the figure: 1, inner shuttle; 2, outer shuttle; 3, press plate body; 4, wire spring; 5, edge wrapping; 6, installation groove; 7, convex edge; 8, installation bolt; 9, positioning block; 10, positioning groove; 11, edge tip; 12, flat edge; 13, inclined edge; 14, first deformed wire; 15, second deformed wire; 16, sharp corner part; 17, first fixing groove; 18, extending arc groove; 19, limiting groove; 20, fixing ring; 21, second fixing groove; 22, fixing screw. Specific implementation mode

[0037] The following is a further detailed description of this application in conjunction with the attached Figures 1-4 drawings.

[0038] See Figure 1 , a rotating shuttle, including an inner shuttle 1, an outer shuttle 2 coaxially rotatably connected to the outer peripheral side of the inner shuttle 1 through a rotating shaft, and an inner shuttle press plate fixed to the outer side end of the outer shuttle 2 through bolts.

[0039] See Figure 1 and Figure 2 , the inner shuttle press plate includes a press plate body 3 and a wire spring 4. The press plate body 3 is integrally formed in an arc-shaped plate. On the inner peripheral end surface of the press plate body 3, an edge wrapping 5 is integrally formed on one side close to the side wall. The edge wrapping 5 is perpendicular to the press plate body 3. When the press plate body 3 abuts against the outer peripheral surface of the outer shuttle 2, the edge wrapping 5 covers the upper side end of the outer shuttle 2. An installation groove 6 is provided on the outer peripheral end surface of the outer shuttle 2. A positioning block 9 is integrally formed on the inner peripheral wall of the press plate body 3. The outer shuttle 2 is provided with a positioning groove 10 for the positioning block 9 to insert at the bottom of the installation groove 6. The positioning block 9 and the positioning groove 10 are square, so that the installation positions of the press plate body 3 and the outer shuttle 2 are determined, and then fixed by sequentially passing a plurality of installation bolts 8 through the press plate body 3 and the outer shuttle 2. The outer shuttle 2 integrally forms a convex edge 7 outward on the side end far from the edge wrapping 5, and the side end of the press plate body 3 abuts against the convex edge 7.

[0040] See Figure 1 and Figure 3 , one end of the press plate body 3 is integrally provided with an edge tip 11. One side of the edge tip 11 is a flat edge 12, and the flat edge 12 is flush with one side end surface of the press plate body 3. The other side of the edge tip 11 is an inclined edge 13, and the inclined edge 13 and the flat edge 12 meet at the tip cone of the edge tip 11.

[0041] See Figure 2 , Figure 3 and Figure 4, the wire spring 4 includes a first deformed wire 14, a second deformed wire 15 and a sharp corner part 16. The wire spring 4 is in an overall "V" shape. The first deformed wire 14 and the second deformed wire 15 are in an arc-shaped bend. The bending rate of the first deformed wire 14 is greater than that of the second deformed wire 15, making the sharp corner part 16 slightly twisted. A first fixing groove 17 is vertically opened on the flat edge 12 of the prism tip 11. An extending arc groove 18 communicating with the first fixing groove 17 is opened on the flat edge 12 of the prism tip 11. The end of the extending arc groove 18 far from the first fixing groove 17 to the end close to the first fixing groove 17 is from shallow to deep. The end of the extending arc groove 18 far from the first fixing groove 17 is smoothly connected to the flat edge 12 of the prism tip 11. The end of the extending arc groove 18 close to the first fixing groove 17 gradually deepens. One end of the first deformed wire 14 far from the sharp corner part 16 is bent and inserted into the first fixing groove 17. The middle part of the first deformed wire 14 is embedded in the extending arc groove 18. The outer shuttle 2 is provided with a limiting groove 19 aligned with the first fixing groove 17 on the side end face covered by the edge wrapping 5. The limiting groove 19 is a through groove. Both ends of the limiting groove 19 communicate to the inner and outer peripheral end faces of the outer shuttle 2. One end of the first deformed wire 14 far from the sharp corner part 16 passes through the first fixing groove 17 and then is inserted into the limiting groove 19.

[0042] A fixing ring 20 is formed by bending one end of the second deformed wire 15 far from the sharp corner part 16. A second fixing groove 21 for the fixing ring 20 to be embedded is opened on the outer peripheral wall of the pressing plate body 3. The second fixing groove 21 communicates to one end of the positioning block 9. A fixing screw 22 is inserted into the fixing ring 20. The end of the fixing screw 22 presses the fixing ring 20 in the second fixing groove 21. The rod part of the fixing screw 22 sequentially passes through the pressing plate body 3 and the outer shuttle 2 in a threaded manner, thereby fixing the second deformed wire 15.

[0043] The second deformed wire 15 does not contact the inclined edge 13 of the pressing plate body 3, so that the sharp corner part 16 is suspended at the intersection of the flat edge 12 and the inclined edge 13.

[0044] The first deformed wire 14, the second deformed wire 15 and the sharp corner part 16 are integrally bent and formed, and the bending angle is less than the installation angle.

[0045] The implementation principle of this embodiment is:

[0046] When manufacturing the rotating shuttle, align the positioning block 9 on the pressing plate body 3 with the positioning groove 10, then fix the pressing plate body 3 and the outer shuttle 2 through the mounting bolts 8. Then, expand the first deformed steel wire 14 and the second deformed steel wire 15. Insert one end of the first deformed steel wire 14 through the first fixing groove 17 and then into the limiting groove 19, so that the first deformed steel wire 14 is embedded in the extending arc groove 18. Subsequently, embed the fixing ring 20 at one end of the second deformed steel wire 15 into the connecting groove of the pressing plate body 3. Pass the rod portion of the fixing screw 22 through the middle of the fixing ring 20 and sequentially through the pressing plate body 3 and the outer shuttle 2, thereby tightly fixing the fixing ring 20. When the rotating shuttle is in use, when the cord abuts against the second deformed steel wire 15 and moves, the second deformed steel wire 15 deforms towards the pressing plate body 3 side until the cord slides along the second deformed steel wire 15 to the sharp corner portion 16 and slips off. It is also possible to first install the pressing plate body 3 and the wire spring 4, and then install them on the outer shuttle 2.

[0047] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An inner shuttle pressure plate, characterized in that: It includes a pressing plate body (3) in a semi-circular arc shape. One end of the pressing plate body (3) is provided with a sharp edge (11) protruding obliquely. One side edge of the sharp edge (11) is an inclined edge (13), and the other side edge is a flat edge (12). The flat edge (12) is flush with one side edge of the pressing plate body (3). On the side of the sharp edge (11) away from the pressing plate body (3), there is a "V"-shaped wire spring (4). The wire spring (4) includes a first deformed wire (14), a second deformed wire (15), and a pointed corner part (16). The first deformed wire (14) abuts against the flat edge (12) of the sharp edge (11), the second deformed wire (15) is suspended on the inclined edge (13) of the sharp edge (11), and the pointed corner part (16) is suspended at the intersection of the flat edge (12) and the inclined edge (13). On the inner peripheral end face of the pressing plate body (3), a wrapping edge (5) is integrally formed on the side close to the side wall, and the wrapping edge (5) is perpendicular to the pressing plate body (3).

2. The inner shuttle pressure plate according to claim 1, wherein: Both the first deformed wire (14) and the second deformed wire (15) are in an arc-shaped bent state.

3. The inner shuttle pressure plate according to claim 2, characterized in that: The bending rate of the first deformed wire (14) is greater than that of the second deformed wire (15).

4. The inner shuttle pressure plate according to claim 1, wherein: On the flat edge (12) of the sharp edge (11), a first fixing groove (17) is provided for one end of the first deformed wire (14) to be inserted and fixed, and on the outer end face of the pressing plate body (3), a second fixing groove (21) is provided for the second deformed wire (15) to be inserted and fixed.

5. The inner shuttle pressure plate according to claim 1, characterized in that: The first deformed wire (14), the second deformed wire (15), and the pointed corner part (16) are integrally bent and formed, and the bending angle is less than the installation angle.

6. The inner shuttle pressure plate according to claim 4, characterized in that: On the flat edge (12) of the sharp edge (11), an extending arc groove (18) is obliquely provided and communicated with the inside of the first fixing groove (17). The end of the extending arc groove (18) away from the first fixing groove (17) to the end close to the first fixing groove (17) is from shallow to deep, and the first deformed wire (14) is embedded in the extending arc groove (18).

7. A rotating shuttle having the inner shuttle pressure plate according to any one of claims 1-6, characterized in that: It includes an inner shuttle (1) and an outer shuttle (2) coaxially and rotatably connected to the outer peripheral side of the inner shuttle (1). On the side end of the outer shuttle (2), a limiting groove (19) is provided for the end of the first deformed wire (14) to be inserted. On the side end of the outer shuttle (2) away from the wrapping edge (5), a convex edge (7) is integrally formed outwardly to the outer periphery, and the side end of the pressing plate body (3) abuts against the convex edge (7).

8. The rotating shuttle according to claim 7, wherein: The limiting groove (19) is a through groove, and the limiting groove (19) is communicated with the inner and outer peripheral end faces of the outer shuttle (2).

9. The rotating shuttle according to claim 7, wherein: At the end of the second deformed wire (15) away from the pointed corner part (16), a fixing ring (20) is bent and formed. A fixing screw (22) is inserted into the fixing ring (20), and the fixing screw (22) sequentially passes through the pressing plate body (3) and the outer shuttle (2) to fix the fixing ring (20).

10. The rotating shuttle according to claim 9, wherein: A positioning block (9) for aligning the fixing screw (22) is arranged on the inner peripheral wall of the pressing plate body (3), and a positioning groove (10) for inserting the positioning block (9) is formed on the outer peripheral wall of the outer shuttle (2).

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