Shuttle frame and rotating shuttle
By designing a shuttle frame with bobbin positioning parts, the problem of limited distance and shaking of the sewing needle entering the thread hole is solved, and a larger thread ring formation and stable movement of the sewing needle is achieved.
Patent Information
- Application Number
- CN202421404041.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-19
AI Technical Summary
In the prior art, the distance between the sewing needles entering through the thread hole is limited, and it is easy to shake too much, making it difficult to form a larger thread ring.
A shuttle frame is designed, including a bottom plate, a side plate, a bobbin shaft and a bobbin positioner. The bobbin positioning member is used for positioning and installation of the bobbin and provides support at the pinhole to increase the support area of the sewing needle to prevent shaking.
By increasing the support area and limiting effect of the sewing needle, the sewing needle can move steadily at a lower lower limit position, forming a larger thread ring to avoid damage to the sewing needle.
Smart Images
Figure CN222771108U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotary hooks, in particular to a shuttle frame and a rotary hook. Background Art
[0002] The rotary hook is an important part of the sewing machine. Among the sewing equipment, the most common sewing machine is the lockstitch sewing machine. Most of these sewing machines use a rotary hook, which hooks the thread loop with its shuttle tip, expands the thread loop, and guides the thread loop around the shuttle core to form a lockstitch.
[0003] In the prior art, the sewing needle is limited by the needle hole, and the contact area between the needle hole and the sewing needle is limited. Correspondingly, the sewing needle also has a lower limit position. If the sewing needle continues to move downward, it is difficult to obtain effective limitation, and the end of the sewing needle is easy to shake. Therefore, it is difficult to continue to move the sewing needle downward, and it is not convenient to further expand the thread loop to wrap around the shuttle core. Utility Model Content
[0004] The utility model solves the problem that the distance that the sewing needle enters the thread hole is limited, and if the sewing needle is inserted too far, it is easy to shake and it is difficult to form a larger thread loop.
[0005] In order to solve the above-mentioned problems, the utility model provides a shuttle rack, which comprises: a bottom plate; a side plate, which is connected to the bottom plate and has a needle hole; a bobbin shaft, which is arranged at the center of the bottom plate, the needle hole facing the bobbin shaft, and the bobbin shaft is used to install the bobbin; a bobbin positioning member, which is arranged on the inner side of the side plate; a side of the bobbin positioning member away from the bottom plate is flush with a side of the needle hole close to the bottom plate, or the bobbin positioning member at least partially protrudes from a side of the needle hole close to the bottom plate; wherein the needle hole has an outer opening, and a side of the outer opening close to the bottom plate has a first guide surface, and the first guide surface extends from the outer side of the needle hole to the bobbin positioning member.
[0006] The technical effects achieved after adopting this technical solution are as follows: the bobbin positioning piece is used for positioning and installing the bobbin, which is convenient for the bobbin to cooperate with the bobbin shaft, and the bobbin positioning piece is also used to improve the strength of the side plate where the needle hole is located to avoid deformation of the needle hole; after the top of the bobbin positioning piece extends to the needle hole, the top of the bobbin positioning piece can also be used to support the sewing needle, so the sewing needle is supported in a larger area, the support is more stable and not easy to break; in addition, the bobbin positioning piece limits the sewing needle, so that the sewing needle can have a lower lower limit position, and it is not easy to shake or deviate. At the lower lower limit position, the sewing needle can form a larger thread loop to facilitate wrapping around the bobbin; the first guide surface at the outer opening position can guide the sewing needle into the needle hole. When there is a bobbin positioning piece to support the needle hole, the axial length of the first guide surface in the needle hole can be made longer, that is, the process of the sewing needle being guided by the first guide surface can be smoother, further avoiding damage to the sewing needle.
[0007] Furthermore, the first guide surface extends toward both ends of the outer opening; wherein the distance from the first guide surface to the inner wall of the bobbin core positioning member and / or the distance from the first guide surface to the bottom plate gradually decreases from the middle to both ends of the first guide surface.
[0008] The technical effect achieved after adopting this technical solution is as follows: the first guide surface is relatively shallow near the two ends of the outer opening, and is relatively deep in the middle of the first guide surface, that is, the first guide surface presents a concave structure. The first guide surface guides the sewing needle in a direction parallel to the needle hole, and can also guide the sewing needle to the middle position of the needle hole, so that the needle hole is aligned with the shuttle core axis.
[0009] Furthermore, one end of the first guide surface close to the inner wall of the bobbin core positioning member at least partially extends to a side of the bobbin core positioning member away from the bottom plate.
[0010] The technical effect achieved after adopting this technical solution: in the prior art, when the sewing needle is supported and guided only by the needle hole on the side wall, a supporting plane needs to be reserved, so the guide surface is relatively small, while in this solution, the first guide surface can cover the part of the inner wall of the needle hole corresponding to the thickness of the side wall, and can also extend to above the shuttle core positioning piece. At this time, a distance can still be left above the shuttle core positioning piece to support and limit the sewing needle. Therefore, the guiding effect of the first guide surface on the sewing needle is smoother. Specifically, when the vertical distance between the first guide surface and the outer side of the shuttle frame is constant, the distance between the first guide surface and the inner side of the shuttle frame is greater, so the guiding effect is smoother and the sewing needle is not easily damaged.
[0011] Furthermore, the side of the pinhole away from the bottom plate has a second guide surface and an axial surface, the second guide surface is located on the side of the axial surface close to the outer opening, and the axial surface is parallel to the direction of the pinhole.
[0012] The technical effect achieved after adopting this technical solution is as follows: the second guide surface is used to guide the sewing needle on the other side opposite to the first guide surface. The sewing needle slides into the needle hole after being guided by the second guide surface, and is limited by the axial surface, so that it moves toward the shuttle shaft in a direction parallel to the needle hole.
[0013] Furthermore, side guide surfaces are provided at both ends of the outer opening, and the side guide surfaces extend in a direction away from the inner wall of the pinhole; wherein the two side guide surfaces at both ends of the outer opening form an angle greater than 0 degrees.
[0014] The technical effect achieved after adopting this technical solution is as follows: the side guide surface is used to guide the sewing needle on the left and right sides of the outer opening of the needle hole. When the sewing needle is close to the upper part of the side guide surface, it can slide into the second guide surface through the guidance of the side guide surface, and then move to the middle position of the needle hole. When the sewing needle is close to the lower part of the side guide surface, it can slide into the first guide surface through the guidance of the side guide surface, and then move to the middle position of the needle hole.
[0015] Furthermore, the bobbin core positioning member includes a fixing member body and at least two relatively arranged limiting members, wherein the limiting members are arranged on a side of the fixing member body away from the bottom plate, and the limiting members protrude from the needle hole.
[0016] The technical effect achieved by adopting this technical solution is that the sewing needle moves toward the center along the top surface of the bobbin positioning member after being guided by the first guide surface, and can be stuck between the two limiting members, thereby avoiding position deviation.
[0017] Furthermore, the bobbin positioning member further comprises an elastic portion and an installation groove, wherein the installation groove is provided in the fixing member body, the elastic portion is arranged in the installation groove, and the elastic portion abuts against the fixing member body and the limiting member.
[0018] The technical effect achieved after adopting this technical solution is as follows: when the sewing needle slides on the top surface of the shuttle core positioning piece, the limiting piece can be squeezed to compress the elastic part, and the limiting piece partially retracts into the installation groove, so that the sewing needle can slide between the two limiting pieces. At this time, the limiting piece rebounds, and the limiting piece can have a larger area for limiting the sewing needle, thereby improving the limiting effect.
[0019] Furthermore, a third guide surface is provided on the side of the two limiting members facing away from each other, and a limiting surface is provided on the side of the two limiting members facing each other.
[0020] The technical effect achieved after adopting this technical solution is as follows: the third guide surface is used to guide the sewing needle to slide from the side of the limit members facing away from each other to between the limit members, and it is also convenient to squeeze the limit members during the sliding process so that the limit members retract into the installation groove; the limit surface is used to prevent the sewing needle from sliding out from between the two limit members.
[0021] Furthermore, a fourth guide surface is provided on a side of the limiting member away from the shuttle shaft, and the fourth guide surface is used to guide the sewing needle to between the two limiting surfaces.
[0022] The technical effect achieved by adopting this technical solution is as follows: when the sewing needle is inserted through the needle hole from the outside toward the limiting member, the sewing needle can be guided to the side facing the limiting member through the fourth guide surface, thereby achieving the centering of the sewing needle.
[0023] The utility model provides a rotary hook, which comprises a shuttle bed, a shuttle core and a shuttle frame provided by any one of the above technical solutions; the shuttle core is installed on the shuttle core shaft, and the shuttle frame is installed in the shuttle bed.
[0024] The technical effect achieved after adopting this technical solution is: the rotary hook can limit and guide the sewing needle entering the needle hole through the bobbin positioning piece, so that the sewing needle can achieve a lower lower limit position without deviation and shaking, so as to form a larger thread loop around the bobbin.
[0025] In summary, the above-mentioned technical solutions of the present application may have one or more of the following advantages or beneficial effects: i) the bobbin positioning piece is used for positioning and installing the bobbin, which facilitates the cooperation between the bobbin and the bobbin shaft, and the bobbin positioning piece is also used to improve the strength of the side plate where the needle hole is located to avoid deformation of the needle hole; ii) after the top of the bobbin positioning piece extends to the needle hole, the top of the bobbin positioning piece can also be used to support the sewing needle, so that the sewing needle has a larger supported area, the support is more stable and not easy to break; iii) the bobbin positioning piece limits the sewing needle, so that the sewing needle can have a lower lower limit position and is not easy to shake The sewing needle can move and deviate, and lifting the sewing needle at the lower limit position can form a larger thread loop around the bobbin; iv) the first guide surface at the outer opening position can guide the sewing needle into the needle hole. When there is a bobbin positioning member to support the needle hole, the axial length of the first guide surface in the needle hole can be made longer, that is, the process of the sewing needle being guided by the first guide surface can be smoother, further avoiding damage to the sewing needle; v) after being guided by the first guide surface, the sewing needle moves toward the center along the top surface of the bobbin positioning member, and can be stuck between the two limit members, thereby avoiding position deviation and achieving centering. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic diagram of the structure of a shuttle rack provided by the utility model;
[0027] Figure 2 for Figure 1 A structural diagram of the middle shuttle frame from another perspective;
[0028] Figure 3 for Figure 2 A partial enlarged view of the middle I area;
[0029] Figure 4 for Figure 1 A schematic diagram of the structure of the middle shuttle frame from another perspective;
[0030] Figure 5 for Figure 1 A partial cross-sectional view of the middle bobbin positioning member;
[0031] Figure 6 for Figure 1 Top view of the middle shuttle frame;
[0032] Figure 7 for Figure 6 Sectional view in the AA direction;
[0033] Figure 8 for Figure 7 A partial enlarged view of the middle II area;
[0034] Fig. 9 The utility model provides a structural schematic diagram of a rotary hook.
[0035] Description of reference numerals:
[0036] 100- shuttle rack; 110- bottom plate; 120- side plate; 121- needle hole; 122- first guide surface; 123- second guide surface; 124- axial surface; 125- side guide surface; 130- shuttle shaft; 140- shuttle positioning member; 150- limit member; 151- elastic part; 152- mounting groove; 153- third guide surface; 154- fourth guide surface; 200- rotary shuttle; 210- shuttle bed. DETAILED DESCRIPTION
[0037] The utility model aims to provide a shuttle frame and a rotary shuttle, which are used for better limiting and supporting the sewing needle, facilitating lowering the lower limit position, thereby facilitating guiding the thread loop to wrap around the shuttle core to form a lock stitch effect.
[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0039] See also Figure 1-Figure 8The utility model provides a shuttle rack 100, which includes: a bottom plate 110; a side plate 120, the side plate 120 is connected to the bottom plate 110, and the side plate 120 is provided with a needle hole 121; a bobbin shaft 130, the bobbin shaft 130 is arranged at the center of the bottom plate 110, the needle hole 121 faces the bobbin shaft 130, and the bobbin shaft 130 is used to install the bobbin; a bobbin positioning member 140, and the bobbin positioning member 140 is arranged on the inner side of the side plate 120; The side of the bobbin positioning member 140 away from the bottom plate 110 is flush with the side of the needle hole 121 close to the bottom plate 110, or the bobbin positioning member 140 at least partially protrudes from the side of the needle hole 121 close to the bottom plate 110; wherein the needle hole 121 has an outer opening, and the side of the outer opening close to the bottom plate 110 has a first guide surface 122, and the first guide surface 122 extends from the outer side of the needle hole 121 to the bobbin positioning member 140.
[0040] In this embodiment, the bobbin positioning member 140 is used for positioning and installing the bobbin, so as to facilitate the cooperation between the bobbin and the bobbin shaft 130, and the bobbin positioning member 140 is also used to improve the strength of the side plate 120 where the needle hole 121 is located to prevent the needle hole 121 from being deformed; after the top of the bobbin positioning member 140 extends to the needle hole 121, the top of the bobbin positioning member 140 can also be used to support the sewing needle, so that the sewing needle has a larger supported area, the support is more stable and not easy to break; in addition, the bobbin positioning member 140 limits the sewing needle so that the sewing needle can There is a lower lower limit position, and it is not easy to shake or deviate. Lifting the sewing needle at the lower lower limit position can form a larger thread loop to facilitate the shuttle frame 100 to hook the thread; the first guide surface 122 at the outer opening position can guide the sewing needle into the needle hole 121. When there is a shuttle core positioning member 140 to support the needle hole 121, the axial length of the first guide surface 122 in the needle hole 121 can be made longer, that is, the process of the sewing needle being guided by the first guide surface 122 can be smoother, further avoiding damage to the sewing needle.
[0041] Preferably, the width of the bobbin positioning member 140 is at least 1 / 2 of the width of the needle hole 121 , and the longitudinal center line of the bobbin positioning member 140 corresponds to the longitudinal center line of the needle hole 121 .
[0042] In a specific embodiment, the first guide surface 122 extends to both ends of the outer opening; wherein, the distance from the first guide surface 122 to the inner wall of the bobbin core positioning member 140 and / or the distance from the first guide surface 122 to the bottom plate 110 gradually decreases from the middle of the first guide surface 122 to both ends.
[0043] It should be noted that the first guide surface 122 is relatively shallow near the two ends of the outer opening, and is relatively deep in the middle of the first guide surface 122, that is, the first guide surface 122 has a concave structure. The first guide surface 122 guides the sewing needle in a direction parallel to the needle hole 121 while also guiding the sewing needle to the middle position of the needle hole 121, so that the needle hole 121 is aligned with the shuttle shaft 130.
[0044] For example, the first guide surface 122 is, for example, a plurality of planes with different slopes, or a curved surface, which is not limited here.
[0045] In a specific embodiment, one end of the first guide surface 122 close to the inner wall of the bobbin positioning member 140 at least partially extends to a side of the bobbin positioning member 140 away from the bottom plate 110 .
[0046] It should be noted that, in the prior art, when the sewing needle is supported and guided only by the needle hole 121 on the side wall, a supporting plane needs to be reserved, so the guiding surface is relatively small, while in this solution, the first guiding surface 122 can cover the portion of the inner wall of the needle hole 121 corresponding to the thickness of the side wall, and can also extend to above the bobbin positioning piece 140. At this time, a distance can still be left above the bobbin positioning piece 140 to support and limit the sewing needle. Therefore, the guiding effect of the first guide surface 122 on the sewing needle is smoother. Specifically, when the vertical distance between the first guide surface 122 and the outer side of the shuttle rack 100 is constant, the distance between the first guide surface 122 and the inner side of the shuttle rack 100 is greater, so the guiding effect is smoother and the sewing needle is not easily damaged.
[0047] In a specific embodiment, the side of the needle hole 121 away from the bottom plate 110 has a second guide surface 123 and an axial surface 124 , the second guide surface 123 is located on the side of the axial surface 124 close to the outer opening, and the axial surface 124 is parallel to the direction of the needle hole 121 .
[0048] It should be noted that the second guide surface 123 is used to guide the sewing needle on the other side opposite to the first guide surface 122. The sewing needle slides into the needle hole 121 after being guided by the second guide surface 123, and is limited by the axial surface 124, so that it moves toward the shuttle shaft 130 in a direction parallel to the needle hole 121.
[0049] In a specific embodiment, side guide surfaces 125 are provided at both ends of the outer opening, and the side guide surfaces 125 extend in a direction away from the inner wall of the needle hole 121; wherein the two side guide surfaces 125 at both ends of the outer opening form an angle greater than 0 degrees.
[0050] It should be noted that the side guide surface 125 is used to guide the sewing needle on the left and right sides of the outer opening of the needle hole 121. When the sewing needle is close to the upper part of the side guide surface 125, it can slide into the second guide surface 123 guided by the side guide surface 125, and then move to the middle position of the needle hole 121. When the sewing needle is close to the lower part of the side guide surface 125, it can slide into the first guide surface 122 guided by the side guide surface 125, and then move to the middle position of the needle hole 121.
[0051] In a specific embodiment, the bobbin positioning member 140 includes a fixing member body and at least two oppositely disposed limiting members 150 . The limiting members 150 are disposed on a side of the fixing member body away from the bottom plate 110 , and the limiting members 150 protrude from the needle hole 121 .
[0052] It should be noted that, after being guided by the first guide surface 122 , the sewing needle moves toward the center along the top surface of the bobbin positioning member 140 and can be stuck between the two limiting members 150 , thereby avoiding position deviation.
[0053] In a specific embodiment, the bobbin positioning member 140 further includes an elastic portion 151 and a mounting groove 152 . The mounting groove 152 is formed in the fixing member body. The elastic portion 151 is disposed in the mounting groove 152 . The elastic portion 151 abuts against the fixing member body and the limiting member 150 .
[0054] It should be noted that when the sewing needle slides on the top surface of the bobbin positioning member 140, the limiting member 150 can be squeezed to compress the elastic part 151, and the limiting member 150 partially retracts into the installation groove 152, so that the sewing needle can slide between the two limiting members 150. At this time, the limiting member 150 rebounds, and the limiting member 150 can have a larger area for limiting the sewing needle, thereby improving the limiting effect.
[0055] Specifically, directly setting the elastic portion 151 and the mounting groove 152 on the inner wall of the needle hole 121 would be difficult to implement due to the thin side wall and would reduce the strength of the side wall. However, after the bobbin positioning member 140 extends to the needle hole 121, the side wall is thickened there, thereby facilitating the opening of the elastic portion 151 and the mounting groove 152, and the side wall still has sufficient strength.
[0056] Preferably, the elastic portion 151 is, for example, at least one spring, one end of which is fixedly connected to the bottom of the mounting groove 152 , and the other end of which is fixedly connected to the limiting member 150 , thereby preventing the limiting member 150 from being separated from the positioning member body.
[0057] In a specific embodiment, a third guide surface 153 is provided on the side of the two limiting members 150 facing away from each other, and a limiting surface is provided on the side of the two limiting members 150 facing each other.
[0058] It should be noted that the third guide surface 153 is used to guide the sewing needle to slide from the side of the limit members 150 that are away from each other to between the limit members 150, and it is also convenient to squeeze the limit member 150 during the sliding process so that the limit member 150 retracts into the installation groove 152; the limiting surface is used to prevent the sewing needle from sliding out from between the two limit members 150.
[0059] In a specific embodiment, a fourth guide surface 154 is provided on a side of the limiting member 150 away from the shuttle shaft 130 , and the fourth guide surface 154 is used to guide the sewing needle to between the two limiting surfaces.
[0060] It should be noted that when the sewing needle is inserted through the needle hole 121 from the outside toward the limiting member 150, the sewing needle can be guided to the side facing the limiting member 150 through the fourth guide surface 154, thereby achieving the centering of the sewing needle.
[0061] For example, the installation groove 152 is directly below the stopper 150. When the third guide surface 153 or the fourth guide surface 154 of the stopper 150 or the stopper 150 is squeezed, that is, when the outside, left and right sides, or the top of the stopper 150 is squeezed, the stopper 150 can slide vertically into the installation groove 152, so that the sewing needle enters between the two stoppers 150 to achieve positioning. Of course, the installation groove 152 can also be oblique, which is not limited here.
[0062] See also Fig. 9 The utility model provides a rotary hook 200, which includes: a shuttle bed 210, a bobbin and a shuttle rack 100 provided by any of the above technical solutions; the bobbin is installed on the shuttle shaft 130, and the shuttle rack 100 is installed in the shuttle bed 210.
[0063] It should be noted that the rotary hook 200 can limit and guide the sewing needle entering the needle hole 121 through the bobbin positioning member 140, so that the sewing needle can achieve a lower lower limit position without deviation or shaking, so as to form a larger thread loop for hooking the thread.
[0064] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.
Claims
1. A shuttle rack, characterized in that: The shuttle frame comprises: Base plate; A side plate, the side plate is connected to the bottom plate, and the side plate is provided with a pinhole; A bobbin shaft, the bobbin shaft is arranged at the center of the bottom plate, the needle hole faces the bobbin shaft, and the bobbin shaft is used to install the bobbin; A bobbin positioning member, the bobbin positioning member is arranged on the inner side of the side plate; a side of the bobbin positioning member away from the bottom plate is flush with a side of the needle hole close to the bottom plate, or the bobbin positioning member at least partially protrudes from a side of the needle hole close to the bottom plate; The needle hole has an outer opening, and a side of the outer opening close to the bottom plate has a first guide surface, and the first guide surface extends from the outer side of the needle hole to the bobbin positioning member.
2. The shuttle rack according to claim 1, characterized in that: The first guide surface extends toward both ends of the outer opening; wherein the distance from the first guide surface to the inner wall of the bobbin core positioning member and / or the distance from the first guide surface to the bottom plate gradually decreases from the middle to both ends of the first guide surface.
3. The shuttle rack according to claim 1, characterized in that: The first guide surface is close to one end of the inner wall of the bobbin core positioning member, and at least partially extends to a side of the bobbin core positioning member away from the bottom plate.
4. The shuttle rack according to claim 1, characterized in that: The side of the pinhole away from the bottom plate has a second guide surface and an axial surface, the second guide surface is located on the side of the axial surface close to the outer opening, and the axial surface is parallel to the direction of the pinhole.
5. The shuttle rack according to claim 1, characterized in that: Side guide surfaces are provided at both ends of the outer opening, and the side guide surfaces extend in a direction away from the inner wall of the pinhole; wherein the two side guide surfaces at both ends of the outer opening form an angle greater than 0 degrees.
6. The shuttle rack according to claim 1, characterized in that: The bobbin core positioning member comprises a fixing member body and at least two relatively arranged limiting members, wherein the limiting members are arranged on a side of the fixing member body away from the bottom plate, and the limiting members protrude from the needle hole.
7. The shuttle rack according to claim 6, characterized in that: The bobbin positioning member further comprises an elastic portion and an installation groove, wherein the installation groove is provided in the fixing member body, the elastic portion is arranged in the installation groove, and the elastic portion abuts against the fixing member body and the limiting member.
8. The shuttle rack according to claim 6, characterized in that: A third guide surface is provided on the side of the two limiting members facing away from each other, and a limiting surface is provided on the side of the two limiting members facing each other.
9. The shuttle rack according to claim 8, characterized in that: A fourth guide surface is provided on a side of the limiting member away from the shuttle shaft, and the fourth guide surface is used to guide the sewing needle between the two limiting surfaces.
10. A rotary hook, characterized in that: The rotary hook comprises: a shuttle bed, a bobbin and a shuttle frame according to any one of claims 1 to 9; The bobbin is installed on the bobbin shaft, and the shuttle rack is installed in the shuttle bed.