An abrasion-resistant thread tensioner mechanism

Abstract

The utility model provides an anti-abrasion thread tensioner mechanism, which comprises a back plate and a middle thread assembly installed on the back plate, the top of the back plate is provided with a thread lifting lever used in cooperation with the middle thread assembly, the middle thread assembly comprises an assembly main body and a mounting seat installed on the assembly main body, a thread lifting spring for providing dynamic tension to embroidery thread is installed in the mounting seat, an adjusting pin for adjusting the tension of the thread lifting spring is arranged in the mounting seat, a support for supporting and limiting the rotation angle of the adjusting pin is formed on the mounting seat, and a matching groove matched with the support is formed on the adjusting pin, and a thread hook and a thread protection shaft are further arranged on the assembly main body, compared with the prior art, the adjusting pin is supported under the action of the support, so that the adjusting pin is not directly in extrusion contact with the surface of the thread lifting spring, the surface of the thread lifting spring is not abraded during the adjustment of the adjusting pin, and the service life of the thread lifting spring is improved.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, specifically to an anti-wear thread clamping mechanism. Background Technology

[0002] The thread guiding system of a computerized embroidery machine is divided into upper, middle, and lower thread guiding structures. The thread guiding system can ensure that the embroidery thread runs smoothly during the embroidery process, ensuring a good thread breakage rate and embroidery quality. Among them, the middle thread guiding structure plays a crucial role, helping the embroidery machine to embroider smoothly during the thread picking process.

[0003] During the embroidery process, the tension and stretch of the embroidery thread must be adjusted in a timely manner through the thread guide panel, taking into account different embroidery threads, fabrics, and patterns. In existing technology, the thread guide assembly in the thread guide panel, with the thread guide device installed in the thread guide groove, is made of metal. After prolonged use due to friction with the thread, it wears down, which increases the friction with the thread and causes some damage to the thread during the thread guide process.

[0004] Chinese patent CN103290629A discloses a thread guiding device in an embroidery machine, including a thread guiding seat. The thread guiding seat is provided with a plurality of grid grooves extending in the vertical direction. The grid grooves are provided with a thread take-up rod mounting grid and a thread guiding assembly mounting grid in sequence from top to bottom. A thread guiding assembly is detachably connected in the thread guiding assembly mounting grid. The thread guiding assembly includes a thread take-up spring and an embroidery thread isolation plate. The embroidery thread isolation plate includes an embroidery thread inlet and a base arranged in sequence along the depth direction of the grid grooves.

[0005] The aforementioned intermediate line device has a complex overall structure, which makes installation or subsequent maintenance time-consuming and labor-intensive. In addition, during use, due to the large number of parts, damage to a single part can affect the use of the overall structure, thus affecting the service life of the overall structure. Utility Model Content

[0006] The present invention aims to overcome the defects in the prior art and provide a wear-resistant wire clamp mechanism that is simple in structure and easy to install.

[0007] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a wear-resistant thread clamping mechanism, comprising a back plate and a center thread guide assembly mounted on the back plate, wherein the top of the back plate is provided with a thread take-up lever for use in conjunction with the center thread guide assembly; the center thread guide assembly comprises an assembly body and a mounting seat mounted on the assembly body, wherein a thread take-up spring for providing dynamic tension to the embroidery thread is installed in the mounting seat; an adjusting pin for adjusting the tension of the thread take-up spring is provided in the mounting seat, and a support member for supporting and limiting the rotation angle of the adjusting pin is formed on the mounting seat, wherein a mating groove adapted to the support member is formed on the adjusting pin; the assembly body is also provided with a thread hook and a thread guard shaft.

[0008] As a preferred embodiment of this utility model, the mounting base has a mounting hole for mounting the thread take-up spring, the support member is arranged around the mounting hole, and the support member has a support protrusion arranged in the axial direction of the mounting hole.

[0009] In a preferred embodiment of this utility model, the adjusting pin is rotatably connected to the mounting base, and a spring groove is formed between the adjusting pin and the support member to facilitate the outward extension of the end of the thread-taking spring.

[0010] In a preferred embodiment of this utility model, the adjusting pin is rotatably connected to the mounting base, and a spring groove is formed between the adjusting pin and the support member to facilitate the outward extension of the end of the thread-taking spring.

[0011] As a preferred embodiment of this utility model, the cap body is provided with a plurality of snap-fit ​​teeth arranged along the circumferential direction of the cap body, and the mounting base is provided with ratchet teeth for engaging with the snap-fit ​​teeth.

[0012] As a preferred embodiment of this utility model, the circumferential length of the mating groove on the cap body is not less than the circumferential length of the several snapping teeth on the cap body. During the snapping process of different snapping teeth and ratchet teeth, the support protrusion is always located in the mating groove.

[0013] In a preferred embodiment of this utility model, the line hook is installed between the line take-up spring and the line take-up rod.

[0014] In a preferred embodiment of this utility model, the wire guide shaft is installed between the wire hook and the wire take-up spring.

[0015] As a preferred embodiment of the present invention, the mounting base is provided with a limiting boss for restricting the movement of the thread take-up spring, and the thread take-up spring is located between the limiting boss and the thread guard shaft.

[0016] As a preferred embodiment of this utility model, the surface of the pick-up spring is plated with a black stainless steel coating.

[0017] Compared with existing technologies, by setting up a thread hook, a thread guard shaft, and a thread take-up lever, the embroidery thread passing through the take-up spring is guided, reducing the jumping of the embroidery thread on the take-up spring, thereby reducing the wear of the take-up spring by the embroidery thread. At the same time, under the action of the support component, the adjusting pin is supported, ensuring that the adjusting pin does not directly press against the surface of the take-up spring, and does not cause wear on the surface of the take-up spring during the adjustment process of the adjusting pin, thus improving the service life of the take-up spring. Furthermore, the black stainless steel coating on the thread take-up spring enhances its wear resistance. The ceramic materials used for the thread take-up lever, thread guide hook, and thread guard shaft further increase wear resistance, meeting the requirements of high-speed embroidery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a structural schematic diagram of the intermediate cable assembly; Figure 4 yes Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a structural diagram of the mounting base; Figure 6 This is a schematic diagram showing the connection between the take-up spring and the adjusting pin; Reference numerals: Back plate 1, middle cable assembly 2, assembly body 21, mounting base 22, cable take-up spring 23, mounting hole 24, support member 25, support protrusion 26, limiting boss 27, ratchet 28, cable take-up lever 3, adjusting pin 4, pin part 41, cap body 42, mating groove 43, snap-fit ​​tooth 44, cable hook 5, cable guard shaft 6, cable pass groove 7. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-6 As shown, an anti-wear thread clamp mechanism includes a back plate 1 and a center thread assembly 2 mounted on the back plate 1. The top of the back plate 1 is provided with a thread take-up lever 3 that cooperates with the center thread assembly 2. The center thread assembly 2 includes an assembly body 21 and a mounting base 22 mounted on the assembly body 21. A thread take-up spring 23 for providing dynamic tension to the embroidery thread is installed in the mounting base 22. An adjusting pin 4 for adjusting the tension of the thread take-up spring 23 is provided in the mounting base 22. A support member 25 for supporting and limiting the rotation angle of the adjusting pin 4 is formed on the mounting base 22. A mating groove 43 adapted to the support member 25 is formed on the adjusting pin 4. The assembly body 21 is also provided with a thread hook 5 and a thread guard shaft 6.

[0021] During the process of adjusting the tension of the thread take-up spring 23, the adjusting pin 4 is always supported by the support member 25. Under the action of the thread hook 5 and the thread guard shaft 6, the stability of the embroidery thread during transmission is improved, the jumping of the embroidery thread during transmission is reduced, and the wear of the embroidery thread on the thread clamping mechanism is reduced.

[0022] The mounting base 22 has a mounting hole 24 for mounting the take-up spring 23. The support member 25 is arranged around the mounting hole 24, and the support member 25 has a support protrusion 26 arranged in the axial direction of the mounting hole 24.

[0023] Mounting hole 24 is a through hole formed on mounting base 22, and the thread take-up spring 23 is disposed in mounting hole 24 with clearance fit. Support member 25 is a boss formed on the surface of mounting base 22, and support protrusion 26 always abuts against adjusting pin 4.

[0024] The adjusting pin 4 is rotatably connected to the mounting base 22, and a spring groove 7 is formed between the adjusting pin 4 and the support member 25 to facilitate the outward extension of the end of the thread take-up spring 23. The support protrusion 26 abuts against the mating groove 43 of the adjusting pin 4, and the height of the support protrusion 26 is greater than the depth of the mating groove 43. Therefore, a spring groove 7 is formed between the adjusting pin 4 and the support member 25 along the circumferential direction of the adjusting pin 4, and the outwardly extending thread take-up spring 23 is used to contact the embroidery thread.

[0025] The adjusting pin 4 includes a pin part 41 and a cap body 42 connected to each other. The pin part 41 is inserted into the mounting hole 24 and connected to the end of the take-up spring 23. The cap body 42 is provided corresponding to the support member 25, and the cap body 42 always abuts against the support protrusion 26. The mating groove 43 is formed in the circumferential direction of the cap body 42.

[0026] The pin 41 and the cap 42 are an integral structure. The rotation of the cap 42 drives the pin 41 to rotate synchronously. The pin 41 has a slot that connects to the thread take-up spring 23. Under the rotation of the pin 41, the end of the thread take-up spring 23 is driven to rotate synchronously, thereby adjusting the tension of the thread take-up spring 23.

[0027] The cap body 42 has a plurality of locking teeth 44 arranged in the circumferential direction of the cap body 42, and the mounting base 22 has ratchet teeth 28 for engaging with the locking teeth 44. The locking teeth 44 and the mating groove 43 are respectively formed on opposite sides of the cap body 42. Under the engagement action of the locking teeth 44 and the ratchet teeth 28, the rotation angle of the adjusting pin 4 is limited.

[0028] The circumferential length of the mating groove 43 on the cap body 42 is not less than the circumferential length of a number of locking teeth 44 on the cap body 42. During the engagement of different locking teeth 44 with ratchet 28, the support protrusion 26 is always located within the mating groove 43.

[0029] The line hook 5 is installed between the line take-up spring 23 and the line take-up rod 3, and the spool 6 is installed between the line hook 5 and the line take-up spring 23.

[0030] The mounting base 22 has a limiting boss 27 for restricting the movement of the take-up spring 23, and the take-up spring 23 is located between the limiting boss 27 and the wire guard 6.

[0031] The surface of the take-up spring 23 is coated with black stainless steel, and the take-up rod 3, the line guide hook 5, and the line guard shaft 6 are all made of ceramic.

[0032] In actual use, the embroidery thread passes sequentially from above the machine head through the thread hook 5, the thread take-up spring 23, the thread take-up spring 23, and the thread guard shaft 6 before finally reaching the needle bar. The limiting boss 27 can restrict the setting of the thread take-up spring 23 to ensure its stability during use. The adjusting pin 4 is used to adjust the tension of the thread take-up spring 23 to adapt to different embroidery thread tension requirements. The black stainless steel coating on the surface of the thread take-up spring 23 improves its wear resistance. The thread take-up bar 3, the thread hook 5, and the thread guard shaft 6 are all made of ceramic, which increases their wear resistance and meets the requirements of high-speed embroidery.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0034] Although this document uses numerous reference numerals from the accompanying drawings—back plate 1, center cable assembly 2, assembly body 21, mounting base 22, cable take-up spring 23, mounting hole 24, support member 25, support protrusion 26, limiting boss 27, ratchet 28, cable take-up lever 3, adjusting pin 4, pin part 41, cap body 42, mating groove 43, snap-fit ​​tooth 44, cable hook 5, cable guard shaft 6, cable pass groove 7, etc.—the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A wear-resistant wire clamp mechanism, comprising a back plate (1) and a center wire assembly (2) mounted on the back plate (1), wherein the top of the back plate (1) is provided with a wire take-up lever (3) for use with the center wire assembly (2); characterized in that, The thread guide assembly (2) includes an assembly body (21) and a mounting base (22) mounted on the assembly body (21). A thread take-up spring (23) for providing dynamic tension to the embroidery thread is installed in the mounting base (22). An adjusting pin (4) for adjusting the tension of the thread take-up spring (23) is provided in the mounting base (22). A support member (25) for supporting and limiting the rotation angle of the adjusting pin (4) is formed on the mounting base (22). A mating groove (43) adapted to the support member (25) is formed on the adjusting pin (4). The assembly body (21) is also provided with a thread hook (5) and a thread guard shaft (6).

2. The anti-wear wire clamp mechanism according to claim 1, characterized in that, The mounting base (22) has a mounting hole (24) for mounting the take-up spring (23), the support member (25) is arranged around the mounting hole (24), and the support member (25) has a support protrusion (26) arranged in the axial direction of the mounting hole (24).

3. The anti-wear wire clamp mechanism according to claim 2, characterized in that, The adjusting pin (4) is rotatably connected to the mounting base (22), and a spring groove (7) is formed between the adjusting pin (4) and the support member (25) to facilitate the outward extension of the end of the thread-taking spring (23).

4. The anti-wear wire clamp mechanism according to claim 3, characterized in that, The adjusting pin (4) includes a pin part (41) and a cap body (42) connected to each other. The pin part (41) is inserted into the mounting hole (24) and connected to the end of the take-up spring (23). The cap body (42) is set corresponding to the support member (25), and the cap body (42) always abuts against the support protrusion (26). The matching groove (43) is formed in the circumferential direction of the cap body (42).

5. The anti-wear wire clamp mechanism according to claim 4, characterized in that, The cap body (42) has a plurality of locking teeth (44) arranged in the circumferential direction of the cap body (42), and the mounting base (22) has ratchet teeth (28) for engaging with the locking teeth (44).

6. The anti-wear wire clamp mechanism according to claim 5, characterized in that, The circumferential length of the mating groove (43) on the cap body (42) is not less than the circumferential length of the several snapping teeth (44) on the cap body (42). During the snapping process of different snapping teeth (44) and ratchet teeth (28), the support protrusion (26) is always located in the mating groove (43).

7. The anti-wear wire clamp mechanism according to claim 1, characterized in that, The line hook (5) is installed between the line take-up spring (23) and the line take-up rod (3).

8. The anti-wear wire clamp mechanism according to claim 1, characterized in that, The wire guide shaft (6) is installed between the wire hook (5) and the wire take-up spring (23).

9. The anti-wear wire clamp mechanism according to claim 8, characterized in that, The mounting base (22) has a limiting boss (27) for limiting the movement of the thread take-up spring (23), and the thread take-up spring (23) is located between the limiting boss (27) and the thread guard shaft (6).

10. The anti-wear wire clamp mechanism according to claim 1, characterized in that, The surface of the pick spring (23) is plated with a black stainless steel coating.

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