Vertical shuttle bed inner shuttle

Abstract

The present invention relates to the technical field of sewing, and, in particular, a vertical shuttle bed inner shuttle, comprising an inner shuttle, a shuttle bobbin case with a bottom-thread outer end check, a spring piece, and a bobbin with a bottom-thread inner end clamping function. The inner shuttle integrates the shuttle bobbin case and the bobbin, the bobbin is connected to a coreless bottom thread core, and the shuttle bobbin case with the bottom-thread outer end check is connected to the side wall of the inner shuttle. In the present invention, the shuttle bobbin case with the bottom-thread outer end check is directly designed on the inner shuttle, and the spring piece is designed to provide adjustable thread release damping. The bobbin with the bottom-thread inner end clamping function is designed to mount the coreless bottom thread core, and under the fastening action of a fixing screw, the spring piece provides essential damping to the bobbin, preventing excessive thread release caused by sewing vibrations and thread release inertia. When a bottom thread is depleted, sewing can be resumed by simply loading a new bottom thread core onto the bobbin, and the thread core usage status and remaining amount can be directly visually monitored from the end face, thus simplifying the steps of vertical shuttle bed bobbin core replacement, such that sewing can be resumed simply with a single action of loading the thread core, making the device more convenient to use.

Description

A vertical shuttle bed inner shuttle Technical Field

[0001] The invention relates to the technical field of sewing, in particular to an inner shuttle of a vertical shuttle bed. Background Art

[0002] The vertical shuttle bed sewing machines currently available on the market are limited by the shuttle bed size and the balance between sewing speed and sewing quality, resulting in a small bobbin thread capacity. During the sewing operation, the machine needs to be frequently stopped to remove the bobbin case and replace the bobbin. Since the bobbin is in a closed space in the bobbin case, it is impossible to effectively observe the usage of the bobbin thread capacity. To address the above problems, a vertical shuttle bed inner shuttle is needed. Summary of the Invention

[0003] The object of the present invention is to provide an inner shuttle of a vertical shuttle bed to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] Disclosed is an inner shuttle of a vertical shuttle bed, comprising an inner shuttle, a shuttle skin with a check function for the outer thread end of a bottom thread, a spring piece, and a bobbin with a function of clamping the inner thread end of a bottom thread. The inner shuttle integrates the shuttle skin and the bobbin, the shuttle skin with a check function for the outer thread end of the bottom thread is connected to the side wall of the inner shuttle, and the inner shuttle is designed with a spring piece that provides adjustable damping for thread release, and the bobbin-less bottom thread core is fixedly connected to the bobbin with a function of clamping the inner thread end of the bottom thread by a fixing screw.

[0006] As a preferred solution of the present invention, the inner shuttle is composed of an inner ring and a peripheral wall extending outward from the periphery of the inner ring. The peripheral wall of the inner shuttle is provided with a thread inlet for the outer thread end of the lower thread, a thread guide groove, a thread outlet hole for the outer thread end of the lower thread, and a thread outlet groove. The peripheral wall of the inner shuttle is provided with a threaded hole. The shuttle skin is provided with a hole position that matches the position and size of the threaded hole. The shuttle skin is provided with a return spring for the outer thread end of the lower thread and a thread outlet.

[0007] The method for detachable installation of the shuttle skin and the inner shuttle is as follows: place the outer thread head anti-return spring of the shuttle skin bottom line in the card slot, align the hole on the shuttle skin with the threaded hole of the inner shuttle, and use threaded fasteners to connect and fix the two wires.

[0008] As a preferred solution of the present invention, the bottom line outer thread end wire inlet is located at the lower left side of the peripheral wall, and the opening direction is from the outer end face to the inner end face. The wire guide groove takes the bottom line outer thread end wire inlet as the starting point, and extends clockwise along the radial direction of the peripheral wall at a certain angle toward the axial direction of the peripheral wall inward. The bottom line outer thread end wire outlet hole is located at the end where the lead groove screw rises. A wire outlet groove is opened on the right side of the bottom line outer thread end wire outlet hole, and extends clockwise along the radial direction of the inner shuttle peripheral wall at a certain angle toward the axial direction of the inner shuttle peripheral wall inward.

[0009] As a preferred solution of the present invention, a boss is provided on the inner ring of the inner shuttle, the spring piece and the spool are both installed on the boss, and a threaded hole is designed in the inner hole of the boss and corresponds to the fixing screw, wherein the threaded hole and the fixing screw are connected by a threaded connection.

[0010] As a preferred solution of the present invention, a clamping groove is designed on the inner shuttle peripheral wall at the thread inlet of the bottom thread outer end, and the bottom thread outer end anti-return spring piece of the shuttle skin is located in the clamping groove.

[0011] As a preferred embodiment of the present invention, the bobbin comprises a retaining ring and an inner shaft. The inner shaft is provided with a bobbin-less bobbin thread end clip and an inner shaft fixing hole. After the spring plate and bobbin are assembled in sequence, the entire assembly is assembled to the inner bobbin. The inner shaft fixing hole on the bobbin is provided with a hole position that matches the position and size of the boss. The bobbin is fixed to the boss via a set screw in the inner shaft fixing hole. The bobbin-less bobbin thread end clip on the bobbin provides a clamping force to the inner thread of the inner bobbin's bobbin-less bobbin thread core, thereby clamping the inner thread end of the bobbin.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, a shuttle with a check valve for the outer thread end of the bobbin is directly designed on the inner shuttle, and a spring is designed to provide adjustable thread-releasing damping. A bobbin with a function of clamping the inner thread end of the bobbin is designed to install the bobbin-less bobbin thread core. Under the action of the fixing screw, the spring provides the necessary damping for the bobbin to avoid excessive thread release caused by sewing vibration and thread-releasing inertia. When the bobbin is exhausted, it is only necessary to load a new bobbin-less bobbin thread core onto the bobbin, buckle the inner and outer thread ends in the corresponding positions to resume sewing, and the thread core usage status and the remaining amount can be monitored directly from the end face, thereby simplifying the steps of replacing the bobbin core on the vertical shuttle bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of the isometric structure of the present invention;

[0015] FIG2 is a schematic diagram of the explosion structure of FIG1 of the present invention;

[0016] Figure 3 is a schematic diagram of the inner shuttle structure of the present invention;

[0017] FIG4 is a schematic diagram of the shuttle skin structure of the present invention;

[0018] FIG5 is a schematic diagram of the spool position structure of the present invention;

[0019] FIG6 is a schematic diagram showing the position structure of the bobbin-less bottom thread core of the present invention.

[0020] In the figure: 1. Outer shuttle; 2. Inner shuttle; 3. Shuttle skin; 4. Spring piece; 5. Bobbin; 6. Bottom thread core for bobbin-less bobbin thread; 7. Fixing screw; 201. Bottom thread outer thread inlet; 202. Thread guide slot; 203. Bottom thread outer thread outlet hole; 204. Thread outlet slot; 205. Threaded hole; 206. Clamping slot; 207. Thread outlet slot; 208. Boss; 301. Hole position; 302. Anti-return spring piece for bottom thread outer thread; 303. Thread outlet; 501. Buckle for inner thread end of bobbin-less bobbin thread; 502. Fixing hole for inner shaft. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0024] Except for technical terms that are generally understood by those skilled in the art to which the present invention pertains and unless otherwise defined, all technical and scientific terms used herein have the same meaning. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0025] In the embodiment, please refer to Figures 1-6, the present invention provides a technical solution:

[0026] Disclosed is an inner shuttle of a vertical shuttle bed, comprising an inner shuttle 2, a shuttle skin 3 with a check valve for the outer thread end of a bottom thread, a spring piece 4, and a bobbin 5 with a function of clamping the inner thread end of a bottom thread. The inner shuttle 2 integrates the shuttle skin 3 and the bobbin 5, and the bobbin 5 is connected to a bobbin-free bottom thread core 6. The shuttle skin 3 with a check valve for the outer thread end of a bottom thread is connected to the side wall of the inner shuttle 2, and the inner shuttle 2 is designed with a spring piece 4 for providing adjustable damping for thread release. The bobbin 5 with a function of clamping the inner thread end of a bottom thread is fixedly connected to the bobbin 5 with a function of clamping the inner thread end of a bottom thread by a fixing screw 7.

[0027] In this embodiment, referring to Figures 1 and 2, the inner shuttle 2 is composed of an inner ring and a peripheral wall extending outward from the periphery of the inner ring. The peripheral wall of the inner shuttle 2 is provided with a thread inlet 201 for the outer thread end of the lower thread, a thread guide groove 202, a thread outlet hole 203 for the outer thread end of the lower thread end, and a thread outlet groove 204. The peripheral wall of the inner shuttle 2 is provided with a threaded hole 205, so that the outer thread end of the lower thread end enters from the thread inlet 201, moves along the guide groove 202 to the thread outlet hole 203, and finally is hooked by the shuttle bed 1 or manually pulled around the shuttle skin 3 to move to the thread outlet groove 204, so that the outer thread end of the lower thread end can be discharged, thereby completing the installation of the lower thread.

[0028] Furthermore, a hole 301 is provided on the shuttle skin 3 that is compatible with the position and size of the threaded hole 205, and a bottom line outer thread end check spring piece 302 and a wire outlet 303 are provided on the shuttle skin 3. The bottom line outer thread end check spring piece 302 of the shuttle skin 3 is placed in the slot 206, and the hole on the shuttle skin is aligned with the threaded hole 205 of the inner shuttle 2. The two are connected and fixed with threaded fasteners to complete the installation of the shuttle skin 3 and the inner shuttle 2.

[0029] In this embodiment, referring to Figures 1 and 3, the bottom thread outer thread end inlet 201 is located at the lower left side of the inner shuttle 2 peripheral wall, and the opening direction is from the outer end face to the inner end face. The guide groove 202 takes the bottom thread outer thread end inlet 201 as the starting point, and extends clockwise along the radial direction of the inner shuttle 2 peripheral wall at a certain angle toward the axial direction of the inner shuttle 2 peripheral wall inward. The bottom thread outer thread end outlet hole 203 is located at the end where the screw of the guide groove 202 rises. A wire outlet groove 207 is opened on the right side of the bottom thread outer thread end outlet hole 203, and extends clockwise along the radial direction of the inner shuttle 2 peripheral wall at a certain angle toward the axial direction of the inner shuttle 2 peripheral wall inward, so that the bottom thread outer thread end inlet 201 adopts a spiral structure, thereby meeting the work requirements.

[0030] In this embodiment, referring to Figures 1 and 4, a boss 208 is provided on the inner ring of the inner shuttle 2, and the spring piece 4 and the bobbin 5 are both mounted on the boss 208. A threaded hole is designed in the inner hole of the boss 208 and corresponds to the fixing screw 7. The threaded hole and the fixing screw 7 are connected in a threaded connection design, thereby providing necessary damping for the rotation of the bobbin 5 during the pay-off process, avoiding excessive pay-off caused by sewing vibration and pay-off inertia;

[0031] In this embodiment, referring to Figures 1 and 5, a slot 206 is designed on the peripheral wall of the inner shuttle 2 at the bottom thread thread inlet 201, and the bottom thread thread anti-return spring piece 302 of the shuttle skin 3 is located in the slot 206. When the bottom thread thread enters the guide groove 202 from the bottom thread thread inlet 201, the bottom thread thread cannot escape from the inner shuttle 2 due to the constraint of the bottom thread thread anti-return spring piece 302 on the shuttle skin 3. Under the traction of the hook thread of the shuttle bed 1, the bottom thread thread enters the bottom thread thread outlet 303 along the guide groove 202, causing the bottom thread thread to exit from the bottom thread thread outlet hole 203, and then move around the shuttle skin 3. Finally, under the action of the elastic force of the shuttle skin [3], the thread enters the bottom thread thread outlet hole 203 and exits the thread along the peripheral wall of the inner shuttle 2 at the thread outlet groove 207. The shuttle skin 3 provides adjustable thread outlet damping for the bottom thread thread to exit, thereby achieving good sewing quality.

[0032] In this embodiment, referring to Figures 1 and 6, the spool 5 is composed of a retaining ring and an inner shaft. The inner shaft of the spool 5 is provided with a bobbin-free bottom line inner thread end buckle 501 and an inner shaft fixing hole 502. After the spring piece 4 and the spool 5 are assembled in sequence, the whole is assembled to the inner shuttle 2. The inner shaft fixing hole 502 on the spool 5 is provided with a hole position that matches the position and size of the boss 208. The spool 5 is fixed to the boss 208 by a fixing screw 7 on the inner shaft fixing hole 502, so that the fixed The fixed bobbin 5 cannot be separated from the inner shuttle 2. A spring 4 is designed between the bobbin 5 and the inner shuttle 2 to ensure stable damping of the bobbin, so that it rotates only under the pulling force of the pay-off line. This prevents excessive rotation caused by pay-off inertia or sewing vibration, which may cause the thread core to become messy. The outer end surface of the bobbin 5 is designed with a bobbin-free bottom thread end clip 501 to clamp the inner thread end of the bottom thread end of the bobbin-free bottom thread 6, preventing the remaining small amount of thread from rebounding due to the stress of the wire material and causing the thread end to become messy. The wire clamping groove designed on the outer end surface of the bobbin 5 acts as a damping spring when using a core with an inner thread end.

[0033] The present invention's workflow is as follows: When using the inner shuttle of a vertical shuttle bed, a bobbin case 3 with a check valve for the outer end of the bobbin thread is first directly designed onto the inner shuttle 2. A spring clip 4 is also designed to provide adjustable payout damping. A bobbin 5 with a function for clamping the inner end of the bobbin thread is then mounted on the bobbin-less bobbin thread core 6. Tightened by a fixing screw 7, the spring clip 4 provides the necessary damping for the bobbin 5, preventing sewing vibration and payout inertia from causing excessive payout. Once the bobbin thread is exhausted, a new bobbin-less bobbin thread core 6 is simply loaded onto the bobbin, and the inner and outer ends are locked into place. Sewing can then be resumed, and the thread core usage and remaining amount can be monitored directly from the end face. This simplifies the process of replacing the bobbin core on a vertical shuttle bed.

[0034] The inner shuttle 2 is composed of an inner ring and a peripheral wall extending outward from the periphery of the inner ring. The peripheral wall of the inner shuttle 2 is provided with a thread inlet 201 for the outer thread end of the lower thread, a thread guide groove 202, a thread outlet hole 203 for the outer thread end of the lower thread, and a thread outlet groove 204. Under the condition that the peripheral wall of the inner shuttle 2 is provided with a threaded hole 205, the outer thread end of the lower thread enters from the thread inlet 201 of the lower thread end, moves along the guide groove 202 to the thread outlet hole 203 of the lower thread end, and finally passes around the shuttle skin 3 and moves to the thread outlet groove 204 under the shuttle bed or manual traction to realize the lower thread outlet;

[0035] The shuttle skin 3 is provided with a hole 301 that matches the position and size of the threaded hole 205, and the shuttle skin 3 is provided with a bottom thread outer end anti-return spring piece 302 and a wire outlet 303. The bottom thread outer end anti-return spring piece 302 of the shuttle skin 3 is placed in the slot 206, and the hole on the shuttle skin is aligned with the threaded hole 205 of the inner shuttle 2, and the two are connected and fixed with threaded fasteners;

[0036] The thread inlet 201 for the outer thread end of the lower thread is located at the lower left side of the inner shuttle 2 peripheral wall, with the opening direction from the outer end face to the inner end face. At the same time, the thread guide groove 202 takes the thread inlet 201 for the outer thread end of the lower thread as the starting point, extends clockwise along the radial direction of the inner shuttle 2 peripheral wall at a certain angle toward the axial direction of the inner shuttle 2 peripheral wall, and the thread outlet hole 203 for the outer thread end of the lower thread is located at the end of the screw of the thread guide groove 202. A thread outlet groove 207 is provided on the right side of the thread outlet hole 203, extending clockwise along the radial direction of the inner shuttle 2 peripheral wall at a certain angle toward the axial direction of the inner shuttle 2 peripheral wall;

[0037] A boss 208 is provided on the inner ring of the inner shuttle 2, and the spring piece 4 and the bobbin 5 are both installed on the boss 208. A threaded hole is designed in the inner hole of the boss 208 and corresponds to the fixing screw 7. The connection between the threaded hole and the fixing screw 7 is a threaded connection design, thereby providing necessary damping for the rotation of the bobbin 5 during the line-paying process, avoiding excessive line-paying caused by sewing vibration and line-paying inertia.

[0038] The outer thread end of the bobbin is prevented from leaving the inner shuttle 2 by the anti-return spring piece 302 of the bobbin skin 3. When the outer thread end of the bobbin is inserted into the thread guide groove 202 through the outer thread entry hole 201, the outer thread end of the bobbin skin 3 is restrained by the anti-return spring piece 302 of the bobbin skin 3. The outer thread end of the bobbin cannot escape from the inner shuttle 2. Under the traction of the hook thread of the shuttle bed 1, the outer thread end of the bobbin is pulled into the thread guide groove 202 and enters the outer thread end thread outlet 303, causing the outer thread end of the bobbin to exit from the outer thread end thread outlet hole 203 and then move around the shuttle skin 3. Finally, under the action of the elastic force of the shuttle skin 3, the thread enters the outer thread end thread outlet hole 203 and exits the thread at the thread outlet groove 207 along the outer wall of the inner shuttle 2. The shuttle skin 3 provides adjustable thread outlet damping for the outer thread end of the bobbin to exit, thereby achieving good sewing quality.

[0039] The bobbin 5 is composed of a retaining ring and an inner shaft. The outer end surface of the inner shaft of the bobbin 5 is designed with a bobbin bottom line inner thread end buckle 501 and an inner shaft fixing hole 502. After the spring piece 4 and the bobbin 5 are assembled in sequence, the whole is assembled to the inner shuttle 2. The inner shaft fixing hole 502 on the bobbin 5 is provided with a hole position that matches the position and size of the boss 208. The inner shaft fixing hole 502 is designed to fix the bobbin 5 on the boss 208 by fixing screws 7, so that the fixed bobbin 5 cannot be separated from the inner shuttle 2 by itself, and the bobbin 5 and the inner shuttle 2 are connected. A spring piece 4 is designed between the inner shuttles 2 to keep the bobbin stable in damping and rotate only under the pulling force of the pay-off, avoiding excessive rotation caused by the inertia of the pay-off or the vibration of sewing, which may cause the thread core to become messy. A bobbin-less bottom thread inner end buckle 501 is designed on the outer end surface of the bobbin 5 to clamp the inner thread end of the bottom thread of the bobbin-less bottom thread core 6, avoiding a small amount of tail thread from rebounding due to the stress of the wire material, resulting in messy tail thread. The wire clamping groove designed on the outer end surface of the bobbin 5 can serve as a damping spring for the inner thread end when using a core with an inner thread end.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An inner shuttle of a vertical shuttle bed, comprising an inner shuttle (2), a shuttle skin (3) with a bottom thread outer end check function, a spring (4), and a bobbin (5) with a bottom thread inner end clamping function, wherein the inner shuttle (2) integrates the shuttle skin (3), the bobbin (5) and the spring (4), and is characterized in that: The bobbin (5) is connected to a bobbin-free bottom thread core (6). The shuttle skin (3) with a bottom thread outer end check is connected to the side wall of the inner shuttle (2). The inner shuttle (2) is designed with a spring (4) that provides adjustable damping for releasing the thread. The bobbin (5) with a bottom thread outer end clamping function is fixedly connected to the inner shuttle (2) via a fixing screw (7).

2. The inner shuttle of a vertical shuttle bed according to claim 1, characterized in that: The inner shuttle (2) is composed of an inner ring and a peripheral wall extending outward from the periphery of the inner ring. The peripheral wall of the inner shuttle (2) is provided with a thread inlet (201) for the outer thread end of the bottom thread, a thread guide groove (202), a thread outlet hole (203) for the outer thread end of the bottom thread, and a thread outlet groove (204). The peripheral wall of the inner shuttle (2) is provided with a threaded hole (205). The shuttle skin (3) is provided with a hole position (301) that matches the position and size of the threaded hole (205), and the shuttle skin (3) is provided with a bottom thread outer thread end anti-return spring piece (302) and an outer thread end outlet (303); The method for detachably installing the shuttle skin (3) and the inner shuttle (2) is as follows: the outer thread head return spring (302) of the bottom line of the shuttle skin (3) is placed in the card slot (206), and the hole position on the shuttle skin is aligned with the threaded hole (205) of the inner shuttle (2), and the two are connected and fixed by a threaded fastener.

3. The inner shuttle of a vertical shuttle bed according to claim 1, characterized in that: The bottom line outer thread end inlet (201) is located at the lower left side of the peripheral wall, and the opening direction is from the outer end face to the inner end face. The guide groove (202) takes the bottom line outer thread end inlet (201) as the starting point, and extends clockwise from the peripheral wall at a certain angle in the radial direction of the peripheral wall to the axial direction inward of the peripheral wall. The bottom line outer thread end outlet hole (203) is located at the end where the screw of the guide groove (202) rises. A outlet groove (207) is opened on the right side of the bottom line outer thread end outlet hole (203), and extends clockwise from the peripheral wall of the inner shuttle (2) at a certain angle in the radial direction to the axial direction inward of the peripheral wall of the inner shuttle (2).

4. The inner shuttle of a vertical shuttle bed according to claim 1, characterized in that: A boss (208) is provided on the inner ring of the inner shuttle (2), the spring piece (4) and the bobbin (5) are both mounted on the boss (208), a threaded hole is designed in the inner hole of the boss (208) and corresponds to the fixing screw (7), wherein the threaded hole and the fixing screw (7) are connected in a threaded manner.

5. The inner shuttle of a vertical shuttle bed according to claim 1, characterized in that: A slot (206) is designed on the peripheral wall of the inner shuttle (2) at the bottom thread outer end thread inlet (201), and a bottom thread outer end anti-return spring piece (302) of the shuttle skin (3) is located in the slot (206).

6. The inner shuttle of a vertical shuttle bed according to claim 1, characterized in that: The bobbin (5) is composed of a retaining ring and an inner shaft. The inner shaft of the bobbin (5) is provided with a bobbin-free bottom thread inner thread end buckle (501) and an inner shaft fixing hole (502). After the spring piece (4) and the bobbin (5) are assembled in sequence, the whole is assembled to the inner bobbin (2). The inner shaft fixing hole (502) on the bobbin (5) is provided with a hole position that matches the position and size of the boss (208). The bobbin (5) is fixed to the boss (208) through a fixing screw (7) on the inner shaft fixing hole (502). The bobbin-free bottom thread inner thread end buckle (501) on the bobbin (5) provides a clamping and restraining force to clamp the inner thread end of the bobbin-free bottom thread core.

7. The bobbin (5) has no bobbin bottom line inner thread end buckle (501) and can be used as a damping spring for the inner thread end when the inner thread end is used.

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