WO2022111488A1

WO2022111488A1 - Rotary hook

Info

Publication number: WO2022111488A1
Application number: PCT/CN2021/132586
Authority: WO
Inventors: 方铎; 周耀华
Original assignee: 中山市伊诺特智能科技有限公司
Priority date: 2020-11-27
Filing date: 2021-11-23
Publication date: 2022-06-02
Also published as: CN112442803B; CN112442803A

Abstract

A rotary hook, comprising an outer hook frame (3) and an inner hook frame (11). A guide rail (12) arranged in the circumferential direction of the inner hook frame is provided on the outer side wall of the inner hook frame (11); the outer hook frame (3) comprises an outer hook body (31) and a pressing piece (2) connected to the outer hook body (31); the inner hook frame (11) is provided in the outer hook body (31); a guide groove (32) is provided on the inner side wall of the outer hook body (31); the guide rail (12) is slidably connected to the guide groove (32); the pressing piece (2) is used for limiting the position of the guide rail (12) into the guide groove (32); a thread hooking tip (33) is provided on the outer hook body (31); a thread receiving position (34) is provided on the thread hooking tip (33) in a recessed manner; the thread receiving position (34) is located below the guide groove (32). When the outer hook frame rotates relative to the inner hook frame, thread jamming is not easy, the working stability is good, the probability of the rotary hook failure is reduced, and the thread loosening efficiency is high.

Description

a hook

technical field

The invention relates to the technical field of sewing machine accessories, in particular to a rotary hook.

Background technique

The sewing machine hook is used to hook the upper thread on the sewing machine needle and rotate, and then go around the lower thread in the bobbin of the inner hook of the hook to form a stitch. The rotary hook is composed of the outer shuttle frame and the inner shuttle frame. The outer shuttle frame and the inner shuttle frame are matched by the guide groove in the outer shuttle frame and the guide rail on the inner shuttle frame. When working, the outer shuttle frame is on the inner shuttle frame. rotate. In the prior art, during the relative rotation of the outer shuttle frame and the inner shuttle frame, the phenomenon of thread jamming is likely to occur, the machine is prone to failure, and the upper thread removal efficiency is low. Therefore, the defects are very obvious, and there is an urgent need to provide a solution.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a rotary hook with a simple structure. By concavely provided with a thread yielding position for accommodating the upper thread on the thread hook tip, and the thread yielding position is located below the guide groove, so that the When the outer shuttle frame rotates relative to the inner shuttle frame, it is not easy to catch the thread, the working stability is good, the probability of the rotary hook failure is reduced, and the upper thread is easily moved to the bottom surface of the inner shuttle frame and the thread is released, and the thread removal efficiency is high.

In order to achieve the above object, the present invention adopts the following technical solutions:

A rotary hook includes an outer shuttle frame and an inner shuttle frame, the outer side wall of the inner shuttle frame is provided with a guide rail arranged along the circumferential direction thereof, and the outer shuttle frame includes an outer shuttle main body and a presser connected to the outer shuttle main body. The inner shuttle frame is arranged in the outer shuttle main body, the inner side wall of the outer shuttle main body is provided with a guide groove, the guide rail is slidably connected with the guide groove, and the pressing piece is used to limit the guide rail to the guide groove, The main body of the outer shuttle is provided with a thread hooking point, the hooking point is concavely provided with a thread letting position, and the thread letting position is located below the guide groove; The groove is communicated with the installation cavity, and the inner shuttle frame is accommodated in the installation cavity.

Further, the pressing sheet includes an arc-shaped peripheral wall attached to the outer side wall of the outer shuttle main body, a buckle edge connected to the top end of the arc-shaped peripheral wall, and a limit plate connected to the bottom end of the arc-shaped peripheral wall. The bottom is provided with a limit step that interferes with the limit plate, the buckle edge is arranged opposite to the limit plate, and the buckle edge is perpendicular to the arc-shaped peripheral wall.

Further, the buckle edge includes a cover plate and a pressure plate arranged in sequence from top to bottom, and the width of the cover plate is greater than the width of the pressure plate.

Further, a positioning hole is provided in the radial direction of the arc-shaped peripheral wall, and the pressing piece is fixedly connected to the outer shuttle main body via a pressing piece locking screw, and the pressing piece locking screw passes through the positioning hole.

Further, the outer side wall of the inner shuttle frame is provided with a lead plate, the lead plate is located below the guide rail, and the lead plate is obliquely provided with a downward first guide slope, the first guide slope from the lower part of the guide rail. The side surfaces extend toward the bottom surface of the inner shuttle body.

Further, the guide rail is provided with a head end and an end, the head end is obliquely provided with a second downward guiding inclined surface, and the bottom end of the first guiding inclined surface is connected with the top end of the second guiding inclined surface.

Further, the outer side wall of the outer shuttle main body is provided with a shuttle skin, the shuttle skin is located on the outer side of the thread hook tip, the shuttle skin blocks the line yielding position, and there is a limit between the shuttle skin and the thread hook tip. groove.

Further, the bottom of the outer shuttle main body is provided with a connecting shaft sleeve, the radial direction of the connecting shaft sleeve is provided with a plurality of locking shaft holes, the locking shaft holes are equipped with shaft locking members, and the locking shaft holes pass through the shaft. side wall of the bushing.

Further, an accommodating cavity is opened in the middle of the inner shuttle frame, a bottom wall of the accommodating cavity is recessed with a mounting hole, and a connecting piece is installed in the mounting hole.

Further, the guide rail is provided with a chip flute.

The beneficial effects of the present invention are as follows: in practical application, the bobbin or the bobbin case with the bobbin is installed in the inner shuttle frame, the inner shuttle frame is arranged in the outer shuttle frame, and during the rotation of the outer shuttle frame relative to the inner shuttle frame, the inner shuttle The guide rail of the frame rotates relatively in the guide groove of the outer shuttle main body, the hook thread tip of the outer shuttle main body hooks the upper thread, and the upper thread moves along the hook tip to the thread yielding position, so that the thread position provides space for the upper thread to avoid. The upper thread is limited to the position where the thread is let go, and because the position of the thread is below the guide groove, the upper thread is not easy to enter the guide groove. Move to the bottom surface of the inner shuttle frame, so that it is easy to take off the thread. The structure of the present invention is simple, because the thread hooking tip is recessed with a thread release position for accommodating the upper thread, and the thread release position is located below the guide groove, so that the outer shuttle frame is not easy to catch the thread when it rotates relative to the inner shuttle frame. The work stability is good, the probability of the hook failure is reduced, the upper thread is moved to the bottom surface of the inner hook frame and the thread is released, and the thread release efficiency is high.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of the present invention.

FIG. 2 is a schematic three-dimensional structure diagram of the outer shuttle frame of the present invention.

FIG. 3 is a schematic three-dimensional structure diagram of the outer shuttle main body of the present invention.

FIG. 4 is a schematic three-dimensional structure diagram of the tablet of the present invention.

FIG. 5 is a schematic three-dimensional structural diagram of the tablet of the present invention from another perspective.

FIG. 6 is a schematic three-dimensional structure diagram of the inner shuttle frame of the present invention.

FIG. 7 is a schematic three-dimensional structural diagram of the inner shuttle frame of the present invention from another perspective.

Description of reference numbers:

11. Inner shuttle frame; 111. First tapered slope; 112. Second tapered slope; 113. Flat surface; 114. Positioning groove; 12. Guide rail; Guide slope; 16, chip removal groove; 17, accommodating cavity; 18, stopper part; 19, connecting piece; 191, mounting hole; 2, pressing piece; 21, arc peripheral wall; 22, buckle edge; 23, limit Position plate; 24, positioning hole; 25, cover plate; 26, pressure plate; 27, notch part; 28, sharp corner part; 29, inclined surface; 3, outer shuttle frame; 31, outer shuttle main body; 32, guide groove; 33. Line hooking point; 34. Allowing line position; 35. Guide bevel; 36. Pressing plate locking screw; 37. Limit step; 38. Installation cavity; 4. Shuttle skin; 41. Limit groove; 5. Connect Shaft sleeve; 51. Shaft locking hole; 52. Shaft locking piece; 6. Oil sealing cap.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

As shown in FIGS. 1 to 7 , a rotary hook provided by the present invention includes an outer shuttle frame 3 and an inner shuttle frame 11 , and the outer side wall of the inner shuttle frame 11 is provided with a guide rail 12 arranged along its circumferential direction, The outer shuttle frame 3 includes an outer shuttle body 31 and a pressing piece 2 connected to the outer shuttle body 31 , the inner shuttle frame 11 is arranged in the outer shuttle body 31 , and the inner side wall of the outer shuttle body 31 is provided with a guide groove 32. The guide rail 12 is slidably connected with the guide groove 32, the pressing piece 2 is used to confine the guide rail 12 in the guide groove 32, and the outer shuttle main body 31 is provided with a hooking point 33, and the hooking point 33 is concave. A thread letting position 34 is provided, and the thread letting position 34 is located below the guide groove 32; The guide groove 32 is in communication with the installation cavity 38 , and the installation cavity 38 is used for installing the inner shuttle frame 11 .

In practical application, the bobbin or the bobbin case with the bobbin is installed in the inner shuttle frame 11, and the inner shuttle frame 11 is arranged in the outer shuttle frame 3. During the rotation of the outer shuttle frame 3 relative to the inner shuttle frame 11, the inner shuttle frame The guide rail 12 of 11 rotates relatively in the guide groove 32 of the outer shuttle main body 31, the thread hook tip 33 of the outer shuttle main body 31 hooks the upper thread, and the upper thread moves along the hook thread tip 33 to the thread yielding position 34, and the thread yielding position 34 Provide space for the upper thread to avoid, so that the upper thread is limited to the thread-receiving position 34, and since the thread-receiving position 34 is located below the guide groove 32, the upper thread is not easy to enter the guide groove 32, on the one hand, it is not easy to appear On the other hand, the phenomenon of thread jamming facilitates the movement of the upper thread to the bottom surface of the inner shuttle frame 11 so as to facilitate the unthreading. The structure of the present invention is simple. The thread hooking tip 33 is recessed with a thread letting position 34 for accommodating the upper thread, and the thread letting position 34 is located below the guide groove 32, so that the outer shuttle frame 3 rotates relative to the inner shuttle frame 11. It is not easy to jam the thread, the working stability is good, the probability of the rotary hook failure is reduced, the upper thread is easy to move to the bottom surface of the inner hook frame 11 and the thread is released, and the thread release efficiency is high.

In this embodiment, the thread hooking tip 33 is provided with a guiding inclined surface 35 , and the bottom end of the guiding inclined surface 35 is transitionally connected to the thread letting position 34 via a circular arc surface. The guiding inclined surface 35 is used to guide the upper thread hooked by the thread hooking tip 33 to the thread yielding position 34 , and the upper thread plays a guiding role, which is beneficial for the hooked upper thread to move to the thread yielding position 34 .

In this embodiment, the outer side wall of the outer shuttle main body 31 is detachably connected with a pressing piece 2, and the pressing piece 2 is fixedly connected to the outer shuttle main body 31 via a pressing piece locking screw 36. The pressing piece locking screw 36 penetrates the positioning hole. The pressing piece 2 is used to limit the guide rail of the inner shuttle frame to the guide groove 32 of the inner shuttle main body.

In this embodiment, the pressing sheet 2 includes an arc-shaped peripheral wall 21 that is attached to the outer side wall of the outer shuttle main body 31 , a buckle edge 22 connected to the top end of the arc-shaped peripheral wall 21 , and a limiter connected to the bottom end of the arc-shaped peripheral wall 21 . Positioning plate 23, the buckle edge 22 is arranged opposite to the limit plate 23, the buckle edge 22 is perpendicular to the arc-shaped peripheral wall 21, the radial direction of the arc-shaped peripheral wall 21 is provided with positioning holes 24, and the bottom of the outer shuttle body 31 A limit step 37 that interferes with the limit plate 23 is provided.

In practical application, the pressing sheet 2 is assembled on the outer shuttle main body 31, so that the arc-shaped peripheral wall 21 is in contact with the outer side wall of the outer shuttle main body 31, the buckle edge 22 and the guide groove 32 of the outer shuttle main body 31 are surrounded by a channel, and The buckle edge 22 is used to limit the guide rail 12 of the inner shuttle frame 11 in the guide groove 32. The guide rail 12 can rotate relative to the outer shuttle main body 31 in the channel. The position is limited, and finally the pressing piece locking screw 36 fixes the pressing piece 2 on the outer wall of the outer shuttle main body 31 through the positioning hole 24 and rotates with the outer shuttle main body 31 . The design of the structure is simple. By setting the limit plate 23 at the bottom end of the arc-shaped peripheral wall 21 to limit the position of the pressing piece 2, the positional accuracy and stability of the pressing piece 2 fixed on the outer shuttle main body 31 are ensured, and the fixed installation pressure is avoided. The size of the channel is uneven due to the inclination or offset of the pressing piece 2 relative to the outer shuttle main body 31 when the tablet 2 is pressed, so that the frictional resistance of the relative rotation of the outer shuttle frame 3 and the inner shuttle frame 11 is small and the stability is good. The inner shuttle frame 11 is not easy to be worn, and the generation of noise is reduced.

In this embodiment, the limiting plate 23 is vertically connected to the arc-shaped peripheral wall 21 ; this structural design enables the limiting plate 23 to be firmly connected to the arc-shaped peripheral wall 21 and is not easily deformed, thereby improving the ability of the limiting plate 23 to press the sheet 2 for the stability of the limit.

In this embodiment, the number of the positioning holes 24 is multiple, and the multiple positioning holes 24 are arranged at equal intervals along the circumferential direction of the arc-shaped peripheral wall 21. The pressing piece 2 is fixedly installed on the outer shuttle main body 31 through the plurality of pressing piece locking screws 36 respectively through the plurality of positioning holes 24 , so that the pressing piece 2 and the outer shuttle main body 31 are firmly assembled.

In this embodiment, the buckle edge 22 includes a cover plate 25 and a pressure plate 26 arranged in sequence from top to bottom, and the width of the cover plate 25 is greater than the width of the pressure plate 26 . After the pressing piece 2 is assembled on the outer shuttle main body 31, the pressing plate 26 is pressed against the top surface of the outer shuttle main body 31, and the cover plate 25 protrudes above the guide groove 32, so that the cover plate 25 and the guide groove 32 are surrounded by a channel, and the inner shuttle frame is formed. The guide rail 12 of 11 is located in the channel, and the cover plate 25 confines the guide rail 12 in the guide groove 32 . The limiting plate 23 and the pressing plate 26 are respectively in contact with the limiting step 37 and the top surface of the outer shuttle main body 31 , which further improves the positional accuracy and stability of the pressing piece 2 fixed on the outer shuttle main body 31 .

In this embodiment, the end of the buckle 22 is provided with a notch 27 , and the end of the notch 27 is provided with an upwardly upturned sharp corner 28 ; An inclined surface 29 is provided therebetween. This structural design is convenient for the upper thread to slide outward along the extending direction of the notch portion 27, so as to realize the rapid release of the thread from the hook and improve the efficiency of thread release.

In this embodiment, the outer side wall of the inner shuttle frame 11 is provided with a guide wire plate 13, the guide wire plate 13 is located below the guide rail 12, and the guide wire plate 13 is obliquely provided with a downward first guide slope 14. The first guide slope 14 extends from the lower side of the guide rail 12 to the bottom surface of the inner shuttle frame 11 , and the included angle between the first guide slope 14 and the bottom surface of the inner shuttle frame 11 is an acute angle γ.

In practical application, the inner shuttle frame 11 is installed in the outer shuttle frame 3, and the circumferential guide rail 12 of the inner shuttle frame 11 is slidably connected with the guide groove 32 in the outer shuttle frame 3, so that the inner shuttle frame 11 and the outer shuttle frame 3 can be opposite to each other. Rotation; during sewing, the inner shuttle frame 11 and the outer shuttle frame 3 rotate relative to each other, the needle drives the upper thread to pass through the sewing material to form a thread loop, and the thread hook tip 33 of the outer shuttle frame 3 will hook the thread loop and continue to rotate. The other half of the thread loop slides out from the bottom of the inner shuttle frame 11 and wraps the bottom thread in the middle, and then tighten the thread loop to form a stitch on the sewing material. The bottom of the shuttle frame 11 slides out. During the threading process, the thread guide 13 will abut against the thread loop, and the first guide slope 14 of the thread guide 13 guides the thread loop to guide the thread loop to the inner shuttle frame. The bottom surface of 11 is easy to take off the wire loop and reduces the resistance of the wire. The structure is simple in design. The wire is guided by adding a wire plate 13 in the circumferential direction of the inner shuttle frame 11, so as to guide the wire to the bottom surface of the inner shuttle frame 11, which reduces the resistance of the wire, which is convenient for the wire to come off the wire and is not easy to jam. Wire.

In this embodiment, the guide rail 12 is provided with a head end and an end, an off-line gap is formed between the head end of the guide rail 12 and the end of the guide rail 12 , and the head end is obliquely provided with a downward second guide slope 15 , the bottom end of the first guiding slope 14 is connected with the top end of the second guiding slope 15 . The wire loop first collides with the second guiding inclined surface 15, and the second guiding inclined surface 15 guides the wire loop to the first guiding inclined surface 14, which is more conducive to the unthreading of the wire loop and further reduces the resistance of the wire passing.

In this embodiment, the guide rail 12 is provided with chip removal grooves 16 , and the number of the chip removal grooves 16 is multiple. The groove 16 can smoothly discharge the waste generated by the rotary hook during use, which ensures that the inner shuttle frame 11 can be used normally. Preferably, the chip removal groove 16 includes a first section, a second section and a third section that communicate with each other. on the lower end surface of the guide rail 12 .

In this embodiment, a accommodating cavity 17 is opened in the middle of the inner shuttle frame 11; in practical application, the bobbin or/and the bobbin cover are directly installed in the accommodating cavity 17 (the bobbin is used to supply the bottom thread during sewing). ); since there is no mandrel in the accommodating cavity 17 of the inner shuttle frame 11, and no mandrel rotates in the inner shuttle frame 11, during the sewing process, it can be prevented that the mandrel continues to supply the bobbin due to inertial rotation after the rotary hook stops rotating. The thread further increases the length of the thread after sewing, and at the same time, it can avoid the bird's nest phenomenon at the beginning of the seam, which affects the beauty and integrity of the sewing cloth. Moreover, because the mandrel is set in the inner shuttle frame 11, the inner shuttle is greatly increased. The thread capacity of the shuttle frame 11 reduces the number of thread changes during the sewing process, and improves the sewing work efficiency while ensuring the sewing quality.

In this embodiment, the open end of the inner shuttle frame 11 is provided with a shuttle stopper 18, and the shuttle stopper 18 is engaged with the shuttle stopper of the sewing machine to stop the rotation of the inner shuttle frame 11, so that the inner shuttle frame does not stop. It rotates driven by the outer shuttle frame.

In this embodiment, the bottom of the inner shuttle frame 11 is provided with a first tapered inclined surface 111, a second tapered inclined surface 112 and a flat surface 113 connected in sequence from top to bottom, and the wire plate 13 is located on the first tapered inclined surface 111, A smooth transition between the first tapered inclined surface 111 and the second tapered inclined surface 112 and between the second tapered inclined surface 112 and the flat surface 113 is made by a circular arc surface. The structural design is more conducive to the wire off-line, and further reduces the wire-crossing resistance.

In this embodiment, the opening end of the inner shuttle frame 11 is provided with a positioning groove 114, and the positioning block of the shuttle sleeve is snapped into the positioning groove 114, so as to play a positioning role for the shuttle casing, which is convenient for the inner shuttle frame 11 and the shuttle casing. disassembly.

In this embodiment, the bottom wall of the accommodating cavity 17 is provided with a connecting piece 19, and the shuttle sleeve is detachably connected to the inner shuttle frame 11 through the connecting piece 19; the connecting piece 19 is a magnet, and the magnet magnetizes the shuttle sleeve It is sucked into the accommodating cavity 17 of the inner shuttle frame 11 .

In this embodiment, the bottom wall of the accommodating cavity 17 is recessed with a mounting hole 191, and the connecting piece 19 is installed in the mounting hole 191; the mounting hole 191 plays a role in positioning the connecting piece 19, which improves the connection The stability of the piece 19 facilitates the disassembly and assembly of the connecting piece 19 and the inner shuttle frame 11 .

In this embodiment, the outer side wall of the outer shuttle body 31 is provided with a shuttle skin 4, and the shuttle skin 4 is locked on the outer side wall of the outer shuttle body 31 by bolts, so that the shuttle skin 4 is connected to the outer wall of the outer shuttle body 31. Closely fit, the shuttle skin 4 plays a blocking role on the surface thread, the shuttle skin 4 is located on the outside of the thread hook tip 33, the shuttle skin 4 blocks the line yielding position 34, and the shuttle skin 4 and the thread hook tip 33 are separated. There is a limit slot 41 between them. When the thread hooking tip 33 hooks the upper thread and rotates, and the upper thread is located at the thread yielding position 34, the hook 4 blocks the upper thread, so that the upper thread is accommodated in the limit groove 41 to prevent the thread hooking tip 33 from driving the upper thread. During the rotation of the upper thread, because the upper thread is abnormally detached from the thread letting position 34, the thread is caught, which improves the stability of the upper thread and helps the upper thread to slide to the bottom of the inner shuttle frame 11, thereby helping the upper thread to come off normally. .

In this embodiment, the bottom of the outer shuttle main body 31 is provided with a connecting shaft sleeve 5 , the connecting shaft sleeve 5 and the outer shuttle main body 31 are integrally constructed, and the central hole of the connecting shaft sleeve 5 is the same as the installation cavity 38 . The shaft is connected to each other, and the central hole and the installation cavity 38 are blocked and sealed by an oil sealing cover. A plurality of shaft locking holes 51 are provided in the radial direction of the connecting shaft sleeve 5, and the shaft locking holes 51 are equipped with shaft locking members 52. The shaft locking hole 51 penetrates the side wall of the connecting sleeve 5 ; preferably, the shaft locking hole 51 is a threaded hole, and the shaft locking member 52 is a fastening screw threadedly connected to the threaded hole. In practical application, one end of the shaft of the clothes car is inserted into the connecting shaft sleeve 5, and the shaft locking member 52 is twisted, so that the shaft locking member 52 moves towards the direction close to the shaft of the clothes car, until the end of the shaft locking member 52 abuts against the shaft of the clothes car. The outer side wall is used to lock the clothes axle in the connecting shaft sleeve 5; this structure is designed to facilitate the disassembly and assembly of the outer shuttle rack 3 and the clothes axle. The clothes axle rotates and drives the outer shuttle frame 3 to rotate synchronously, so that the outer shuttle frame 3 can rotate relative to the inner shuttle frame 11 .

All the technical features in this embodiment can be freely combined according to actual needs.

The above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways, and any obvious replacements are within the protection scope of the present invention without departing from the concept of the technical solution.

Claims

A rotary shuttle is characterized in that it comprises an outer shuttle frame and an inner shuttle frame, the outer side wall of the inner shuttle frame is provided with a guide rail arranged along its circumferential direction, and the outer shuttle frame includes an outer shuttle main body and an outer shuttle main body and an outer shuttle main body. The connected pressing piece, the inner shuttle frame is arranged in the outer shuttle main body, the inner side wall of the outer shuttle main body is provided with a guide groove, the guide rail is slidably connected with the guide groove, and the pressing piece is used to limit the guide rail to the guide groove. In the groove, the main body of the outer shuttle is provided with a thread hooking point, the thread hooking point is concavely provided with a thread letting position, and the thread letting position is located below the guide groove; the middle part of the outer shuttle main body is concavely provided with an installation cavity, The guide groove communicates with the installation cavity, and the inner shuttle frame is accommodated in the installation cavity.
A rotary hook according to claim 1, wherein the pressing piece comprises an arc-shaped peripheral wall that fits with the outer side wall of the outer shuttle main body, a buckle edge connected to the top of the arc-shaped peripheral wall, and a buckle connected to the arc-shaped peripheral wall. The limit plate at the bottom end of the peripheral wall, the bottom of the outer shuttle body is provided with a limit step that interferes with the limit plate, the buckle edge is opposite to the limit plate, and the buckle edge is perpendicular to the arc-shaped peripheral wall.
The rotary hook according to claim 2, wherein the buckle edge comprises a cover plate and a pressure plate arranged in sequence from top to bottom, and the width of the cover plate is larger than that of the pressure plate.
A rotary hook according to claim 2, characterized in that: the radial direction of the arc-shaped peripheral wall is provided with positioning holes, the pressing piece is fixedly connected to the outer shuttle main body via a pressing piece locking screw, and the pressing piece is The locking screw passes through the positioning hole.
A rotary hook according to claim 1, characterized in that: the outer side wall of the inner shuttle frame is provided with a guide wire plate, the guide wire plate is located below the guide rail, and the guide wire plate is obliquely provided with a first downward facing guide plate. A guide slope, the first guide slope extends from the lower side of the guide rail to the bottom surface of the inner shuttle main body.
The hook according to claim 5, wherein the guide rail is provided with a head end and an end, the head end is inclined with a downward second guide slope, and the bottom end of the first guide slope Connect with the top end of the second guide slope.
A rotary hook according to claim 1, characterized in that: the outer side wall of the outer shuttle main body is provided with a shuttle skin, the shuttle skin is located on the outer side of the thread hook tip, and the shuttle skin blocks the thread yielding position, There is a limit groove between the bobbin skin and the thread hook tip.
A rotary hook according to claim 1, characterized in that: the bottom of the outer shuttle main body is provided with a connecting shaft sleeve, and a plurality of locking shaft holes are arranged in the radial direction of the connecting shaft sleeve, and the locking shaft holes A shaft locking member is installed, and the shaft locking hole penetrates the side wall of the connecting shaft sleeve.
A rotary hook according to claim 1, characterized in that: a accommodating cavity is opened in the middle of the inner shuttle frame, a bottom wall of the accommodating cavity is concavely provided with a mounting hole, and the mounting hole is provided with an accommodating cavity. connector.
The rotary hook according to claim 1, wherein the guide rail is provided with a chip removal groove.