Electronic thread tensioner and sewing machine

Abstract

The utility model discloses a sewing machine technical field's electronic thread clamp and sewing machine, including mounting panel, drive motor is set up in one side of mounting panel, guide seat is set up in the other side of mounting panel, and guide seat includes guide axle section, transmission screw, transmission screw is worn in the axle hole of guide axle section, and one end of transmission screw is passed through mounting panel and is connected with drive motor transmission, thread clamp piece, two thread clamp pieces are set on the guide axle section face to face, pressure regulating nut is screwed on the other end of transmission screw and is connected with guide axle section along the axle direction sliding, pressure regulating spring, pressure regulating spring is set on the guide axle section, and pressure regulating spring is butt joint between thread clamp piece and pressure regulating nut. The utility model discloses the mode of electrically adjusting instead of mechanical adjustment, realized the automatic regulation of thread clamp and clamping force, not only can improve the regulation efficiency of thread clamping force, can also get rid of the experience level requirement to the debugging personnel.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to an electronic thread clamp and a sewing machine. Background Technology

[0002] Existing sewing machines use a thread clamp (with a built-in spring to provide elastic pressure) to clamp the thread, so that the other end of the thread is under tension when sewing on the fabric, thus producing a neat stitch. However, different fabrics have different tension requirements, so the clamping degree of the thread clamp needs to be manually adjusted.

[0003] Currently, most suture clamps on the market use the thread engagement length to control the compression of the clamping spring, thereby changing the degree of thread clamping. For example, patent document CN119877208A discloses a sewing machine that combines adjustable settings and free adjustment. Because they need to adapt to different fabrics, existing suture clamps have a wide range of adjustable thread engagement lengths. When changing to different fabrics, repeated adjustments are required to achieve aesthetically pleasing stitches. This is especially true when changing to fabrics with significantly different characteristics, often requiring a significant amount of time to experiment with adjusting the clamping degree. This is not only inefficient but also demands a high level of experience from the operator. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide an electronic thread clamp to address the above-mentioned technical problems, so as to improve the adjustment efficiency of the thread clamping force.

[0005] The technical solution adopted by this utility model is: an electronic wire clamp, the electronic wire clamp comprising:

[0006] Mounting plate;

[0007] A drive motor is mounted on one side of the mounting plate;

[0008] A guide seat, which is disposed on the other side of the mounting plate, and the guide seat includes a guide shaft segment;

[0009] A transmission screw, wherein the transmission screw passes through the shaft hole of the guide shaft section, and one end of the transmission screw passes through the mounting plate and is connected to the drive motor for transmission.

[0010] Two clamping pieces are fitted face-to-face onto the guide shaft section;

[0011] The pressure adjusting nut is threadedly connected to the other end of the transmission screw, and the pressure adjusting nut is slidably connected to the guide shaft section along the axial direction;

[0012] A pressure adjusting spring is sleeved on the guide shaft section. One end of the pressure adjusting spring abuts against the clamping plate, and the other end of the pressure adjusting spring abuts against the pressure adjusting nut.

[0013] Preferably, a guide groove is provided on the guide shaft section, the guide groove is arranged along the axial direction of the guide shaft section, and the guide groove is connected to the shaft hole of the guide shaft section.

[0014] Preferably, the pressure adjusting nut has a threaded connection hole and a sliding groove, and a plurality of the sliding grooves are evenly distributed along the circumferential direction. The sliding grooves are connected to the threaded connection hole, and a guide slider is formed between two adjacent sliding grooves. The guide slider is slidably connected in the guide groove.

[0015] Preferably, a pressure pad is slidably connected on the guide shaft section along the axial direction, and one end of the pressure adjusting spring abuts against the pressure pad.

[0016] Preferably, the pressure pad is sleeved on the guide shaft section, and a guide protrusion is provided in the inner hole of the pressure pad, the guide protrusion being slidably connected in the guide groove.

[0017] Preferably, the pressure pad has a limiting ring formed on the side near the pressure adjusting spring for radially limiting the pressure adjusting spring.

[0018] Preferably, a front pad is provided between the pressure pad and the clamping piece, and the front pad is sleeved on the guide shaft section; a rear pad is provided between the mounting plate and the clamping piece, and the rear pad is sleeved on the guide shaft section.

[0019] Preferably, the guide seat includes a connecting plate and a guide shaft segment that are coaxially fixedly connected, and the connecting plate and the mounting plate are detachably fixedly connected.

[0020] Preferably, the end of the guide shaft segment is detachably fixedly connected to a retaining pin or a retaining ring.

[0021] The second objective of this utility model is to provide a sewing machine, including the above-mentioned electronic thread clamp and a machine housing, wherein the number of electronic thread clamps is one or more, and the electronic thread clamps are detachably and fixedly connected to the machine housing.

[0022] The beneficial effects of this utility model are:

[0023] This invention uses electric adjustment instead of mechanical adjustment. A transmission screw is installed in the shaft hole of the guide seat, and one end of the transmission screw is connected to a drive motor. The other end of the transmission screw is threadedly connected to an adjusting nut that is axially slidably connected to the guide seat. The drive motor can drive the transmission screw to rotate forward and backward. In conjunction with the threaded transmission between the transmission screw and the adjusting nut, the adjusting nut reciprocates on the guide shaft section of the guide seat, moving away from or closer to the clamping plate. This achieves the adjustment of the elastic force applied by the adjusting spring to the clamping plate, that is, the automatic adjustment of the clamping force of the thread clamp. This not only improves the adjustment efficiency of the thread clamping force, but also eliminates the requirement for the experience level of the adjustment personnel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the electronic wire clamp of this utility model;

[0025] Figure 2 This is a three-dimensional schematic diagram of the electronic wire clamp of this utility model;

[0026] Figure 3 This is a schematic diagram of the guide seat structure;

[0027] Figure 4 This is a schematic diagram of the pressure adjusting nut.

[0028] Figure 5 This is a schematic diagram of the pressure pad structure.

[0029] Explanation of the reference numerals in the figure:

[0030] 10. Mounting plate;

[0031] 20. Drive motor;

[0032] 30. Guide seat; 31. Guide shaft section; 32. Connecting plate; 33. Shaft hole; 34. Guide groove; 35. Countersunk hole; 36. Mounting hole;

[0033] 40. Transmission screw;

[0034] 50. Wire clip;

[0035] 60. Adjusting nut; 61. Threaded connection hole; 62. Slide groove; 63. Guide slider;

[0036] 70. Pressure adjusting spring;

[0037] 80. Pressure pad; 81. Guide protrusion; 82. Limiting ring;

[0038] 90. Front pad;

[0039] 100. Back pad;

[0040] 110. Stop pin. Detailed Implementation

[0041] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0042] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] Examples, such as Figures 1-5 As shown, an electronic wire clamp includes: a mounting plate 10, a drive motor 20, a guide seat 30, a transmission screw 40, a wire clamping plate 50, a pressure adjusting nut 60, and a pressure adjusting spring 70.

[0046] The drive motor 20 is mounted on one side of the mounting plate 10.

[0047] The guide seat 30 is mounted on the other side of the mounting plate 10, and the guide seat 30 includes a guide shaft section 31.

[0048] The transmission screw 40 passes through the shaft hole 33 of the guide shaft section 31, and one end of the transmission screw 40 passes through the mounting plate 10 and is connected to the drive motor 20 for transmission.

[0049] There are two clamping pieces 50, and the two clamping pieces 50 are fitted face to face on the guide shaft section 31.

[0050] The pressure adjusting nut 60 is threadedly connected to the other end of the transmission screw 40, and the pressure adjusting nut 60 is slidably connected to the guide shaft section 31 along the axial direction, so that the rotation of the transmission screw 40 drives the pressure adjusting nut 60 to reciprocate along the axial direction of the guide shaft section 31.

[0051] The pressure adjusting spring 70 is sleeved on the guide shaft section 31, with one end of the pressure adjusting spring 70 abutting against the clamping plate 50 and the other end of the pressure adjusting spring 70 abutting against the pressure adjusting nut 60.

[0052] This invention uses electric adjustment instead of mechanical adjustment. A transmission screw 40 is installed in the shaft hole 33 of the guide seat 30, and one end of the transmission screw 40 is connected to the drive motor 20. The other end of the transmission screw 40 is threadedly connected to the pressure adjusting nut 60, which is axially slidably connected to the guide seat 30. The drive motor 20 can drive the transmission screw 40 to rotate forward and reverse. With the threaded transmission between the transmission screw 40 and the pressure adjusting nut 60, the pressure adjusting nut 60 moves back and forth on the guide shaft section 31 of the guide seat 30, moving away from or closer to the clamping plate 50. This achieves the adjustment of the elastic force applied by the pressure adjusting spring 70 to the clamping plate 50, that is, the automatic adjustment of the clamping force of the thread clamp. This not only improves the adjustment efficiency of the thread clamping force, but also eliminates the requirement for the experience level of the adjustment personnel.

[0053] Specific embodiment 1, such as Figures 1-5 As shown, an electronic wire clamp includes: a mounting plate 10, a drive motor 20, a guide seat 30, a transmission screw 40, a wire clamping plate 50, a pressure adjusting nut 60, a pressure adjusting spring 70, and a pressure pad 80.

[0054] The drive motor 20 is fixedly installed on one side of the mounting plate 10.

[0055] Specifically, the fixed connection between the drive motor 20 and the mounting plate 10 is achieved as follows: a positioning disc (not shown in the figure) is integrally formed at one end of the drive motor 20, and multiple threaded holes are formed around the positioning disc on the drive motor 20; a positioning hole that mates with the positioning disc is formed on the mounting plate 10, and multiple through holes are formed around the positioning hole on the mounting plate 10, with each through hole corresponding to a threaded hole; the positioning disc is inserted into the positioning hole, and a connecting screw is installed in the through hole; the connecting screw is threaded into the threaded hole, so that the drive motor 20 and the mounting plate 10 are detachably and fixedly connected.

[0056] The guide seat 30 is installed on the other side of the mounting plate 10, and the guide seat 30 includes a connecting plate 32 and a guide shaft section 31 arranged coaxially. One end of the guide shaft section 31 is vertically fixedly connected to the connecting plate 32; the connecting plate 32 is detachably fixedly connected to the mounting plate 10.

[0057] The guide shaft section 31 is coaxially provided with a shaft hole 33, and both ends of the shaft hole 33 extend along the axial direction and pass through the guide shaft section 31 and the connecting plate 32; guide grooves 34 are provided on the guide shaft section 31, and there are two guide grooves 34. The two guide grooves 34 are symmetrically arranged on both sides of the guide shaft section 31, and each guide groove 34 is arranged along the axial direction of the guide shaft section 31. The guide groove 34 communicates with the shaft hole 33 of the guide shaft section 31, so that a guide slide rail is formed between the two guide grooves 34 and the shaft hole 33.

[0058] Specifically, the fixed connection between the connecting plate 32 and the mounting plate 10 is achieved as follows: multiple countersunk holes 35 are provided on the connecting plate 32, and multiple threaded holes are provided on the mounting plate 10. The threaded holes and countersunk holes 35 are in a one-to-one correspondence. A connecting screw is installed in the countersunk hole 35, and the connecting screw is threaded into the threaded hole so that the guide seat 30 and the mounting plate 10 are detachably and fixedly connected.

[0059] The transmission screw 40 is coaxially inserted into the shaft hole 33 of the guide shaft section 31, and one end of the transmission screw 40 extends along the axial direction and is coaxially fixedly connected to the power output shaft of the drive motor 20 after passing through the mounting plate 10. Alternatively, the transmission screw 40 and the power output shaft of the drive motor 20 can be integrally formed.

[0060] There are two clamping pieces 50, and the two clamping pieces 50 are fitted face to face on the guide shaft section 31.

[0061] The pressure adjusting nut 60 is threadedly connected to the other end of the transmission screw 40, and the pressure adjusting nut 60 is slidably connected to the guide shaft section 31 along the axial direction, so that the rotation of the transmission screw 40 drives the pressure adjusting nut 60 to reciprocate along the axial direction of the guide shaft section 31.

[0062] Specifically, the pressure adjusting nut 60 has a threaded connection hole 61 and two sliding grooves 62. The threaded connection hole 61 is coaxially arranged with the pressure adjusting nut 60, and the other end of the transmission screw 40 is threaded into the threaded connection hole 61 of the pressure adjusting nut 60. The two sliding grooves 62 are symmetrically arranged on both sides of the threaded connection hole 61. The inner end of the sliding groove 62 communicates with the threaded connection hole 61, and a guide slider 63 is formed between two adjacent sliding grooves 62 and the threaded connection hole 61. The guide slider 63 is slidably connected in the guide groove 34, and the two guide rails of the guide seat 30 are slidably connected in the sliding grooves 62, so that the pressure adjusting nut 60 and the guide shaft section 31 are slidably connected along the axial direction.

[0063] The pressure adjusting spring 70 is sleeved on the guide shaft section 31, with one end of the pressure adjusting spring 70 abutting against the clamping plate 50 and the other end of the pressure adjusting spring 70 abutting against the pressure adjusting nut 60.

[0064] Preferably, a pressure pad 80 is slidably connected on the guide shaft section 31 along the axial direction, the large diameter end of the pressure adjusting spring 70 abuts against the pressure pad 80, and the small diameter end of the pressure adjusting spring 70 abuts against the pressure adjusting nut 60.

[0065] Specifically, the sliding connection between the pressure pad 80 and the guide shaft section 31 is achieved as follows: the pressure pad 80 is coaxially sleeved on the guide shaft section 31, and a guide protrusion 81 is fixedly connected in the inner hole of the pressure pad 80. There are two guide protrusions 81, and the two guide protrusions 81 are slidably connected in the two guide grooves 34 in a one-to-one correspondence, so that the pressure pad 80 and the guide shaft section 31 are slidably connected along the axial direction.

[0066] A retaining pin 110 or a retaining ring is detachably and fixedly connected to the end of the guide shaft section 31 to limit the axial movement of the pressure adjusting nut 60; for example, a mounting hole 36 is provided at the end of the guide shaft section 31, and the retaining pin 110 is inserted into the mounting hole 36.

[0067] More preferably, a limiting ring 82 for radially limiting the pressure adjusting spring 70 is formed on the side of the pressure pad 80 near the pressure adjusting spring 70.

[0068] Preferably, a front pad 90 is installed between the pressure pad 80 and the clamping piece 50, and the front pad 90 is axially movable and sleeved on the guide shaft section 31; a rear pad 100 is installed between the mounting plate 10 and the clamping piece 50, that is, a rear pad 100 is installed between the connecting plate 32 of the guide seat 30 and the clamping piece 50, and the rear pad 100 is sleeved on the guide shaft section 31.

[0069] An embodiment of a sewing machine includes the above-described electronic thread clamp and a machine housing, wherein the number of electronic thread clamps is one or more, and the mounting plate 10 of the electronic thread clamp is detachably and fixedly connected to the machine housing.

[0070] The working process of this electronic wire clamp is as follows:

[0071] This invention employs a rotary drive source for propulsion, with the power output shaft of the drive motor 20 coaxially and fixedly connected to the transmission screw 40. The drive motor 20 is fixedly mounted on one side of the mounting plate 10, which is fixed to the housing. The connecting plate 32 of the guide seat 30 is fixedly connected to the mounting plate 10. A rear pad 100, a clamping piece 50, a front pad 90, a pressure pad 80, an adjusting spring 70, and an adjusting nut 60 are sequentially inserted into the guide shaft section 31. The end of the guide shaft section 31 is blocked by a stop pin 110. The adjusting nut 60 has an internal thread and is connected to the transmission screw 40. When the drive motor 20 drives the transmission screw 40 to rotate, it can drive the adjusting nut 60 to reciprocate axially on the guide seat 30, thereby changing the compression of the adjusting spring 70 and thus adjusting the clamping degree between the two clamping pieces 50.

[0072] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0073] This invention has the advantages of simple and compact structure, and can realize electronic adjustment of the clamping force of the wire, which greatly reduces the time for manual adjustment.

[0074] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An electronic wire clamp, characterized in that, The electronic wire clamp includes: Mounting plate (10); A drive motor (20) is disposed on one side of the mounting plate (10); A guide seat (30) is disposed on the other side of the mounting plate (10), and the guide seat (30) includes a guide shaft section (31); A transmission screw (40) is inserted into the shaft hole (33) of the guide shaft section (31), and one end of the transmission screw (40) passes through the mounting plate (10) and is connected to the drive motor (20) for transmission. Two clamping pieces (50) are fitted face-to-face on the guide shaft section (31); The pressure adjusting nut (60) is threadedly connected to the other end of the transmission screw (40), and the pressure adjusting nut (60) is slidably connected to the guide shaft section (31) along the axial direction; The pressure adjusting spring (70) is sleeved on the guide shaft section (31). One end of the pressure adjusting spring (70) abuts against the clamping plate (50), and the other end of the pressure adjusting spring (70) abuts against the pressure adjusting nut (60).

2. The electronic wire clamp according to claim 1, characterized in that, The guide shaft section (31) is provided with a guide groove (34), which is arranged along the axial direction of the guide shaft section (31) and is connected to the shaft hole (33) of the guide shaft section (31).

3. An electronic wire clamp according to claim 2, characterized in that, The pressure adjusting nut (60) is provided with a threaded connection hole (61) and a sliding groove (62), and a plurality of the sliding grooves (62) are evenly distributed along the circumferential direction. The sliding grooves (62) are connected to the threaded connection hole (61), and a guide slider (63) is formed between two adjacent sliding grooves (62). The guide slider (63) is slidably connected in the guide groove (34).

4. An electronic wire clamp according to claim 1, characterized in that, A pressure pad (80) is slidably connected on the guide shaft section (31) along the axial direction, and one end of the pressure adjusting spring (70) abuts against the pressure pad (80).

5. An electronic wire clamp according to claim 4, characterized in that, The pressure pad (80) is sleeved on the guide shaft section (31), and a guide protrusion (81) is provided in the inner hole of the pressure pad (80), and the guide protrusion (81) is slidably connected in the guide groove (34).

6. An electronic wire clamp according to claim 4, characterized in that, The pressure pad (80) has a limiting ring (82) formed on the side near the pressure adjusting spring (70) for radially limiting the pressure adjusting spring (70).

7. An electronic wire clamp according to claim 4, characterized in that, A front pad (90) is provided between the pressure pad (80) and the clamping piece (50), and the front pad (90) is sleeved on the guide shaft section (31). A rear pad (100) is provided between the mounting plate (10) and the clamping piece (50), and the rear pad (100) is sleeved on the guide shaft section (31).

8. An electronic wire clamp according to claim 1, characterized in that, The guide seat (30) includes a connecting plate (32) and a guide shaft section (31) that are coaxially fixedly connected. The connecting plate (32) is detachably fixedly connected to the mounting plate (10).

9. An electronic wire clamp according to claim 1, characterized in that, The end of the guide shaft section (31) can be detachably and fixedly connected to a retaining pin (110) or a retaining ring.

10. A sewing machine, characterized in that, The invention includes an electronic wire clamp and a housing as described in any one of claims 1-9, wherein the number of electronic wire clamps is one or more, and the electronic wire clamps are detachably and fixedly connected to the housing.

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