Rotating shuttle
By setting triangular tangent grooves and rounded tangent grooves on the guide rail of the rotary shuttle, combined with the mounting groove at the bottom of the guide rail and the inner shuttle frame sliding plane, the problem of tangent debris accumulation is solved, and the running stability and working efficiency of the rotary shuttle are improved.
Patent Information
- Application Number
- CN202520142695.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-21
AI Technical Summary
During use, existing rotary hooks tend to accumulate tangent debris in the tangent groove, affecting the sliding fit between the outer and inner shuttle frames.
Tangential grooves are provided circumferentially on the guide rail. The cross-section of the tangential groove is triangular with rounded corners. The tangential grooves are arranged obliquely on the guide rail. An installation groove is provided at the bottom of the guide rail to improve the connection strength. A sliding line plane is provided on the top surface of the inner shuttle frame to facilitate the sliding of the surface line.
It effectively removes tangential debris, reduces the probability of accumulation, improves the operational stability and working efficiency of the rotary hook, and reduces wire jamming.
Smart Images
Figure CN223866935U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sewing machine parts, and more particularly to a rotary hook. Background Technology
[0002] The rotary hook is an important component of a sewing machine. It is used to hook the top thread on the sewing machine needle, rotate it, and then pass it around the bottom thread in the bobbin of the inner frame of the rotary hook to form a stitch.
[0003] refer to Figure 1 and Figure 2 The rotary shuttle includes an outer shuttle frame 1 and an inner shuttle frame 2. The outer shuttle frame 1 and the inner shuttle frame 2 are connected by a guide groove 11 on the inner wall of the outer shuttle frame 1 and a guide rail 21 on the outer wall of the inner shuttle frame 2. The guide rail 21 of the inner shuttle frame 2 is provided with a tangent groove 211 for collecting tangent debris and cutting the opposite thread. The tangent groove 211 has a rectangular cross-section and has a first bend 2113 and a second bend 2114. The outer shuttle frame 1 has a hook tip 12 for hooking the thread on the needle and a hook through groove 13 that cooperates with the hook tip 12. When the tangent groove 211 in the guide slider rotates to the hook through groove 13 of the outer shuttle frame 1, the tangent debris in the tangent groove 211 will fall out. During the use of the above-mentioned rotary shuttle, tangent debris will gradually accumulate at the first bend 2113 and the second bend 2114, which can easily lead to the accumulation of tangent debris in the tangent groove 211, affecting the sliding fit between the outer shuttle frame 1 and the inner shuttle frame 2. Utility Model Content
[0004] In order to facilitate the smooth discharge of tangential debris from the tangential groove, this application provides a rotary hook.
[0005] The rotary hook provided in this application adopts the following technical solution:
[0006] A rotary shuttle includes an outer shuttle frame and an inner shuttle frame. The inner shuttle frame has a needle insertion slot for inserting a needle, and a guide rail is arranged circumferentially on the outer side wall of the inner shuttle frame. The outer shuttle frame has a hook tip for hooking the thread on the needle and a hook slot for arranging the thread. The outer shuttle frame also has a guide groove for arranging the guide rail. The inner shuttle frame has a tangential groove at the guide rail that penetrates the upper and lower ends of the guide rail. The tangential groove has a triangular cross-section and has a first inclined surface and a second inclined surface. The connection between the first inclined surface and the second inclined surface has a rounded angle.
[0007] By adopting the above technical solution, during the operation of the rotary shuttle, the sewing machine needle is inserted into the needle slot of the inner shuttle frame, and the outer shuttle frame rotates along the extension direction of the guide rail of the inner shuttle frame. When the hook tip of the outer shuttle frame hooks the thread on the needle, the thread rotates along with the outer shuttle frame to form a stitch. During this process, the thread will wear down to a certain extent, resulting in tangent debris. The tangent groove helps to store the debris, and when the guide protrusion with the tangent groove slides to the hook slot, the tangent debris in the tangent groove will be discharged. The tangent groove has a triangular cross-section, and the connection between the first and second inclined surfaces of the tangent groove has a rounded corner, which helps to reduce the probability of tangent debris accumulating in the tangent groove, thereby smoothly discharging the tangent debris.
[0008] Optionally, a plurality of the tangential grooves are circumferentially spaced on the guide rail, and the tangential grooves are inclined on the guide rail along the rotation direction of the outer shuttle frame.
[0009] By adopting the above technical solution, arranging the tangent grooves circumferentially spaced and inclined on the guide rail helps to increase the storage capacity of the tangent grooves for tangent debris and reduces the probability that the outer shuttle frame cannot rotate due to the accumulation of tangent debris.
[0010] Optionally, the inclination angle of the tangential groove is 10° to 90°.
[0011] By adopting the above technical solution, the inclination angle of the tangent groove is 10° to 90°, which helps the tangent debris in the tangent groove to be discharged more smoothly during the rotation of the rotary hook, reducing the probability of tangent debris accumulation in the tangent groove.
[0012] Optionally, the guide rail has a head end and a tail end, and the guide rail has a first guide slope at the head end that slopes downward in a direction away from the head end.
[0013] By adopting the above technical solution, the setting of the first guide slope at the first end of the guide rail helps the sliding cooperation between the guide rail and the guide groove, and provides guidance for the sliding action of the guide rail sliding into the guide groove.
[0014] Optionally, the bottom of the guide rail is provided with a mounting groove on the side near the inner shuttle frame.
[0015] By adopting the above technical solution, the installation groove at the bottom of the guide rail helps to improve the connection strength between the guide rail and the inner shuttle frame, and reduces the probability of the guide protrusion breaking during the operation of the rotary shuttle.
[0016] Optionally, the top of the inner shuttle frame is provided with a slide rail boss protruding toward the outer shuttle frame, and the slide rail boss has a slide rail plane that slopes downward toward the outer shuttle frame.
[0017] By adopting the above technical solution, the setting of the sliding line plane makes the sliding line on the top surface of the inner shuttle frame smoother, reducing the probability of the rotary shuttle getting stuck during operation.
[0018] Optionally, the outer shuttle frame is further provided with a pressing plate that abuts against the top surface of the outer shuttle frame and is used to restrict the guide slide rail from disengaging from the guide slide groove. The pressing plate has a pressing part that presses against the top of the guide slide rail and a connecting part that connects to the outer edge of the pressing part and extends downward. The connecting part of the pressing plate has a mounting through hole. The pressing plate is fixed to the outer shuttle frame by screws.
[0019] By adopting the above technical solution, the setting of the pressing plate facilitates the quick installation and disassembly between the inner and outer shuttle frames, and can restrict the guide rail, reduce the probability of the guide rail coming out of the guide groove, and ensure the stable cooperation between the outer and inner shuttle frames.
[0020] Optionally, the end of the hook tip away from the outer shuttle frame has a hook tip, and the side of the hook tip away from the inner shuttle frame has a second guide slope, which is inclined downward in the direction away from the inner shuttle frame.
[0021] By adopting the above technical solution, setting a second guide slope at the hook tip helps to increase the probability of the hook tip hooking the thread on the needle, thereby improving the working efficiency of the rotary hook.
[0022] Optionally, the hook tip has a third guide slope on the side facing the inner shuttle frame, and the third guide slope is inclined towards the inner shuttle frame in a direction away from the hook tip.
[0023] By adopting the above technical solution, the setting of the third guide slope helps to make the thread sliding process smoother during the operation of the rotary hook, and reduces the probability of thread jamming.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. A rotary shuttle, wherein tangential grooves are circumferentially spaced on a guide rail, the cross-section of the tangential grooves is triangular and the tangential grooves have rounded corners, so that tangential debris generated by the wear of the surface thread during the operation of the rotary shuttle can be stored in the tangential grooves, and the setting of the tangential grooves having triangular cross-sections and the first and second inclined surfaces of the tangential grooves having rounded corners helps to discharge the tangential debris in the tangential grooves;
[0026] 2. The groove on the bottom surface of the guide rail helps to improve the connection strength between the guide rail and the inner shuttle frame, and reduces the probability of the guide rail breaking.
[0027] 3. The setting of the sliding line plane on the top surface of the inner shuttle frame makes the drawing of the face line on the top surface of the inner shuttle frame smoother, which helps to reduce the probability of line jamming. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of an existing rotary hook.
[0029] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.
[0030] Figure 3 This is a schematic diagram of the rotary shuttle in an embodiment of this application.
[0031] Figure 4 This is an explosion diagram of the rotary shuttle in an embodiment of this application.
[0032] Figure 5 This is a schematic diagram of the inner shuttle frame in an embodiment of this application.
[0033] Figure 6 yes Figure 5 A magnified view of a section at point B.
[0034] Figure 7 yes Figure 3 A magnified view of a section at point C.
[0035] Figure 8 This is a partial schematic diagram of the hook tip in the embodiments of this application.
[0036] Explanation of reference numerals in the attached drawings: 1. Outer shuttle frame; 11. Guide groove; 12. Hooking shuttle tip; 121. Hooking tip; 1211. Second guide slope; 122. Third guide slope; 13. Hooking through groove; 14. Pressing plate; 141. Pressing part; 142. Connecting part; 2. Inner shuttle frame; 21. Guide rail; 211. Cutting groove; 2111. First slope; 2112. Second slope; 2113. First bend; 2114. Second bend; 212. Head end; 213. Tail end; 214. First guide slope; 215. Mounting groove; 22. Needle through groove; 23. Shutter shaft; 24. Sliding boss; 241. Sliding plane. Detailed Implementation
[0037] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.
[0038] This application discloses a rotary hook. (Refer to...) Figure 3 and Figure 4A rotary shuttle includes an outer shuttle frame 1 and an inner shuttle frame 2. The outer shuttle frame 1 has an arrangement chamber for arranging the inner shuttle frame 2. The inner shuttle frame 2 has a needle insertion slot 22 for inserting a needle, and a bobbin 23 extending vertically outward from the outer shuttle frame 1 is located at the center of the top surface of its inner wall. The outer shuttle frame 1 has a hook tip 12 for hooking thread onto the needle and a hook groove 13 for arranging the thread. The outer shuttle frame 1 and the inner shuttle frame 2 are engaged by circumferential sliding. A guide rail 21 is circumferentially arranged on the outer side wall of the inner shuttle frame 2, and a guide groove 11 is provided on the inner side wall of the outer shuttle frame 1 for arranging the guide rail 21. When the rotary shuttle is running, the inner shuttle frame 2 is fixed, and the outer shuttle frame 1 rotates circumferentially along the extension direction of the guide rail 21.
[0039] Reference Figure 5 and Figure 6 The guide rail 21 has a head end 212 and a tail end 213. To improve the fitting efficiency between the guide rail 21 and the guide groove 11, the guide rail 21 has a first guide slope 214 at the head end 212 that slopes downward in a direction away from the head end 212. To reduce the probability of breakage of the guide rail 21, a mounting groove 215 is circumferentially formed on the bottom of the guide rail 21 near the inner shuttle 2, and the cross-section of the mounting groove 215 is semi-circular.
[0040] Reference Figure 4 and Figure 7 To store tangential debris generated by surface wear, the inner shuttle 2 has tangential grooves 211 penetrating the upper and lower ends of the guide rail 21, with multiple tangential grooves 211 arranged circumferentially at intervals on the guide rail 21. The cross-section of the tangential groove 211 is triangular, and it has a first inclined surface 2111 and a second inclined surface 2112. The connection between the first inclined surface 2111 and the second inclined surface 2112 has a rounded angle, thereby reducing the probability of tangential debris accumulating in the tangential groove 211. The tangential grooves 211 are also inclined along the rotation direction of the outer shuttle 1 on the guide rail 21, with an inclination angle of 10° to 90°, which increases the storage capacity of the tangential grooves 211 while allowing the debris to be smoothly discharged. In this embodiment, the guide slide rail 21 has four tangent grooves 211, and the four tangent grooves 211 are evenly distributed on the side of the guide slide rail 21 near the head end 212. The inclination angle of the tangent grooves 211 in the guide slide rail 21 is 45°.
[0041] Reference Figure 4The top surface of the outer shuttle frame 1 is also provided with a pressing plate 14 for restricting the guide rail 21 from disengaging from the guide groove 11. The bottom surface of the pressing plate 14 abuts against the top surface of the outer shuttle frame 1, and the pressing plate 14 has a pressing part 141 that presses against the top surface of the guide rail 21 and a connecting part 142 that is connected to the outer edge of the pressing part 141 and extends downward. The pressing plate 14 has a plurality of mounting through holes in the connecting part 142, and the pressing plate 14 is fixed to the outer shuttle frame 1 by screws.
[0042] Reference Figure 4 and Figure 5 In order to make the sliding process of the face line smoother, the top of the inner shuttle frame 2 is provided with a sliding boss 24 protruding towards the outer shuttle frame 1, and the sliding boss 24 has a sliding plane 241 that is inclined downward towards the outer shuttle frame 1.
[0043] Reference Figure 4 and Figure 8 The hook tip 12 of the outer shuttle frame 1 has a hook tip 121 at the end away from the outer shuttle frame 1. The hook tip 121 has a second guide slope 1211 on the side away from the inner shuttle frame 2. The second guide slope 1211 slopes downward in the direction away from the inner shuttle frame 2, which helps the hook tip 12 to hook the top thread on the needle. The hook tip 12 also has a third guide slope 122 on the side facing the inner shuttle frame 2. The third guide slope 122 slopes towards the inner shuttle frame 2 in the direction away from the hook tip 121, which helps to guide the top thread sliding process.
[0044] The implementation principle of a rotary hook in this application embodiment is as follows: During the operation of the rotary hook, the sewing machine needle is inserted into the needle insertion groove 22. The hook tip 12 of the outer shuttle frame 1 hooks the thread on the needle and rotates it along the extension direction of the guide rail 21, so that the thread rotates together with the outer shuttle frame 1 to form a stitch. During this process, the thread will be worn to a certain extent, producing tangent debris. The tangent groove 211 on the guide rail 21 allows the tangent debris to be temporarily stored. When the tangent groove 211 rotates to the hook groove 13, since the tangent groove 211 has an arc angle and is arranged at an inclination, the tangent debris in the tangent groove 211 can be smoothly discharged, reducing the probability that the outer shuttle frame 1 cannot rotate due to the accumulation of tangent debris.
[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A rotary shuttle, characterized in that, The device includes an outer shuttle frame (1) and an inner shuttle frame (2). The inner shuttle frame (2) has a needle insertion slot (22) for inserting a needle, and a guide rail (21) is arranged circumferentially on the outer side wall of the inner shuttle frame (2). The outer shuttle frame (1) has a hook tip (12) for hooking the thread on the needle and a hook groove (13) for arranging the thread. The outer shuttle frame (1) also has a guide groove (11) for arranging the guide rail (21). The inner shuttle frame (2) has a tangent groove (211) at the guide rail (21) that penetrates the upper and lower ends of the guide rail (21). The cross-section of the tangent groove (211) is triangular, and the tangent groove (211) has a first inclined surface (2111) and a second inclined surface (2112). The connection between the first inclined surface (2111) and the second inclined surface (2112) has a rounded corner.
2. A rotary shuttle according to claim 1, characterized in that, Multiple tangential grooves (211) are circumferentially spaced on the guide rail (21), and the tangential grooves (211) are inclined on the guide rail (21) along the rotation direction of the outer shuttle frame (1).
3. A rotary shuttle according to claim 2, characterized in that, The inclination angle of the tangential groove (211) is 10° to 90°.
4. A rotary shuttle according to claim 2, characterized in that, The guide rail (21) has a head end (212) and a tail end (213), and the guide rail (21) has a first guide slope (214) at the head end (212) that is inclined downward in a direction away from the head end (212).
5. A rotary shuttle according to claim 4, characterized in that, The bottom of the guide rail (21) has a mounting groove (215) circumferentially formed on the side near the inner shuttle frame (2).
6. A rotary shuttle according to claim 1, characterized in that, The top of the inner shuttle frame (2) is provided with a slide rail boss (24) protruding toward the outer shuttle frame (1), and the slide rail boss (24) has a slide rail plane (241) that is inclined downward toward the outer shuttle frame (1).
7. A rotary shuttle according to claim 1, characterized in that, The outer shuttle frame (1) is further provided with a pressing plate (14) that abuts against the top surface of the outer shuttle frame (1) and is used to restrict the guide slide rail (21) from dislodging from the guide slide groove (11). The pressing plate (14) has a pressing part (141) that presses against the top of the guide slide rail (21) and a connecting part (142) that is connected to the outer edge of the pressing part (141) and extends downward. The connecting part (142) of the pressing plate (14) is provided with a mounting through hole. The pressing plate (14) is fixed to the outer shuttle frame (1) by screws.
8. A rotary shuttle according to claim 7, characterized in that, The hook tip (12) has a hook tip (121) at one end away from the outer shuttle frame (1), and the hook tip (121) has a second guide slope (1211) on the side away from the inner shuttle frame (2), and the second guide slope (1211) is inclined downward in the direction away from the inner shuttle frame (2).
9. A rotary shuttle according to claim 8, characterized in that, The hook tip (12) has a third guide slope (122) on the side facing the inner shuttle frame (2), and the third guide slope (122) is inclined toward the inner shuttle frame (2) in a direction away from the hook tip (121).