Machine head of computerized embroidery machine and computerized embroidery machine

Abstract

The utility model discloses a machine head of a computerized embroidery machine and the computerized embroidery machine. A presser foot can be independently made to reciprocate in the vertical direction through a first connecting rod mechanism, and a needle bar can be independently made to reciprocate in the vertical direction through a second connecting rod mechanism. The first connecting rod mechanism and the second connecting rod mechanism do not influence each other, noise of the machine head and abrasion of parts can be reduced, and meanwhile the movement stability of the machine head can be improved; the buffer spring is pressed between the stop part and the presser foot driving block, so that the lower presser foot part is in elastic contact with the cloth, and when the lower presser foot part abuts against the thick cloth, the compression degree of the buffer spring is increased; when the lower presser foot part abuts against thin cloth, the compression degree of the buffer spring is reduced, so that rigid contact between the lower presser foot part and the cloth is avoided, noise generated by impact between the presser foot and the cloth is restrained, meanwhile, accidental damage to the presser foot is avoided, and the service life of the presser foot is prolonged.

Description

Technical Field

[0001] This utility model generally relates to the field of computerized embroidery machine technology, and more particularly to a machine head for a computerized embroidery machine and a computerized embroidery machine. Background Technology

[0002] In the field of computerized embroidery machine technology, the machine head of a computerized embroidery machine includes a presser foot, a presser foot driver, a presser foot cam, and a transmission mechanism. The transmission mechanism is located between and connects the presser foot cam and the presser foot driver. The presser foot cam rotates, which in turn causes the presser foot driver to move, thereby driving the presser foot to move.

[0003] However, for high-speed embroidery machines, the faster the presser foot cam rotates, the less stable the aforementioned transmission mechanism becomes after prolonged high-speed operation. Utility Model Content

[0004] This application aims to provide a head for a computerized embroidery machine and the computerized embroidery machine, at least for reducing head noise and parts wear, while improving the stability of head movement.

[0005] This utility model provides a machine head for a computerized embroidery machine, comprising: a presser foot driver, a needle bar driver, a first linkage mechanism, a second linkage mechanism, a needle bar, and a presser foot.

[0006] The needle bar driver and the presser foot driver are mounted vertically on the guide rod; the first linkage mechanism connects to the presser foot driver so that the presser foot driver performs linear reciprocating motion along the length of the guide rod; the second linkage mechanism connects to the needle bar driver so that the needle bar driver performs linear reciprocating motion along the length of the guide rod.

[0007] The needle bar is provided with a presser foot drive block, the presser foot drive block is movably connected to the needle bar, the presser foot is connected to the presser foot drive block, and the presser foot drive block cooperates with the presser foot driver to make the presser foot reciprocate on the needle bar;

[0008] The presser foot includes an upper presser foot, a lower presser foot, and a connecting part connecting the upper presser foot and the lower presser foot. The needle bar passes through the connecting part. The upper presser foot is provided with a stop part, and a buffer spring is pressed between the stop part and the presser foot drive block.

[0009] As an alternative implementation, a return spring is also fitted onto the upper pressure foot, and the return spring is located below the stop portion.

[0010] As an alternative implementation, the needle bar is further provided with a needle bar drive block, the needle bar drive block and the presser foot drive block are arranged vertically, the needle bar drive block is fixedly connected to the needle bar, and the needle bar drive block cooperates with the needle bar driver to make the needle bar reciprocate in the vertical direction; wherein, the presser foot follows the reciprocating motion of the needle bar.

[0011] As one possible implementation, the first linkage mechanism includes a first three-hole linkage, a first two-hole linkage, a second three-hole linkage, and a second two-hole linkage connected in sequence. The second two-hole linkage is connected to the presser foot driver so that the presser foot driver performs linear reciprocating motion along the length of the guide rod. In this case, one of the three through holes of the first three-hole linkage and the second three-hole linkage is connected to the housing of the computer embroidery machine.

[0012] As one possible implementation, the needle bar driver has a protrusion extending toward the presser foot driver, and the presser foot driver has a mating portion that engages with the protrusion.

[0013] When the needle bar driver rotates in the horizontal direction, the protrusion and the mating part stop each other, so that the presser foot driver rotates in the horizontal direction.

[0014] As one possible implementation, the protrusion is a protruding post.

[0015] As an implementation method, the presser foot driver is provided with an arc-shaped surface that contacts the protruding post, the curvature of the arc-shaped surface being adapted to the curvature of the side surface of the protruding post, and the arc-shaped surface being the mating part.

[0016] As an implementation method, the curvature of the arcuate surface is less than 180°.

[0017] As an implementation, the length of the protruding post is L, and the distance between the presser foot driver and the needle bar driver when they are in their lowest positions is d, where L≥d.

[0018] This utility model provides a computerized embroidery machine, including the machine head of the aforementioned computerized embroidery machine.

[0019] In the above-described scheme, the first linkage mechanism allows the presser foot to reciprocate vertically independently, and the second linkage mechanism allows the needle bar to reciprocate vertically independently. The first and second linkage mechanisms do not interfere with each other, which helps reduce machine head noise and parts wear, while also improving the stability of the machine head movement. A buffer spring is pressed between the stop and the presser foot drive block, allowing the lower presser foot to elastically contact the fabric. When the lower presser foot presses against thick fabric, the compression of the buffer spring increases; when the lower presser foot presses against thin fabric, the compression of the buffer spring decreases. This avoids rigid contact between the lower presser foot and the fabric, suppressing noise generated by impact between the presser foot and the fabric. Simultaneously, it prevents accidental damage to the presser foot, helping to extend its service life. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 A front view of the head of a computerized embroidery machine provided for an embodiment of this utility model;

[0022] Figure 2 An isometric drawing of the head of a computerized embroidery machine provided for an embodiment of this utility model;

[0023] Figure 3 yes Figure 2 Exploded view;

[0024] Figure 4 yes Figure 2 Exploded view;

[0025] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0026] Figure 6 An exploded view of the first linkage mechanism provided for an embodiment of this utility model;

[0027] Figure 7 A schematic diagram showing the cooperation between the presser foot driver and the needle bar driver block, and the cooperation between the presser foot driver and the presser foot driver block, provided for embodiments of this utility model.

[0028] Presser foot cam 10, needle bar cam 20;

[0029] First linkage mechanism 30, first three-hole link 31, first through hole 311, second through hole 312, third through hole 313, first two-hole link 32, second three-hole link 33, fourth through hole 331, fifth through hole 332, sixth through hole 333, second two-hole link 34;

[0030] Second linkage 40, third three-hole linkage 41, seventh through hole 411, eighth through hole 412, ninth through hole 413, third two-hole linkage 42;

[0031] Presser foot driver 50, first groove 51, mating part 52, needle bar driver 60, second groove 61, protrusion 62, guide rod 71, needle bar 72, needle bar drive block 80;

[0032] Presser foot drive block 91, presser foot 92, upper presser foot part 921, stop part 9211, connecting part 922, lower presser foot 923, buffer spring 93, return spring 94, fastener 95. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] At least see Figures 1-7 As shown, this utility model provides a head for a computerized embroidery machine, including: a housing, a cam assembly, a presser foot driver 50, a needle bar driver 60, a first linkage mechanism 30, a second linkage mechanism 40, a needle bar 72, and a presser foot 92. The cam assembly, presser foot driver 50, needle bar driver 60, first linkage mechanism 30, and second linkage mechanism 40 are all located inside the housing.

[0036] like Figure 1 and Figure 2 As shown, the cam assembly includes a presser foot cam 10 and a needle bar cam 20. The presser foot cam 10 and needle bar cam 20 are mounted on an upper shaft, and rotation of the upper shaft drives the presser foot cam 10 and needle bar cam 20 to rotate. A needle bar driver 60 and a presser foot driver 50 are vertically mounted on a guide rod 71, and the needle bar driver 60 and presser foot driver 50 can slide on the guide rod 71. The guide rod 71 is set vertically.

[0037] like Figure 3 As shown, the first linkage mechanism 30 connects the presser foot driver 50 and the presser foot cam 10. The rotation of the presser foot cam 10, through the first linkage mechanism 30, causes the presser foot driver 50 to reciprocate linearly along the length of the guide rod 71; as shown... Figure 4As shown, the second linkage mechanism 40 connects the needle bar driver 60 and the needle bar cam 20. When the needle bar cam 20 rotates, the needle bar driver 60 makes a linear reciprocating motion along the length of the guide rod 71 through the second linkage mechanism 40.

[0038] like Figure 1 and Figure 2 As shown, the needle bar 72 is equipped with a presser foot drive block 91 and a needle bar drive block 80, which are arranged vertically. The needle bar drive block 80 is fixedly connected to the needle bar 72 and cooperates with the needle bar driver 60 to cause the needle bar 72 to reciprocate in the vertical direction. The presser foot drive block 91 is movably connected to the needle bar 72, and the presser foot 92 is connected to the presser foot drive block 91. The presser foot drive block 91 cooperates with the presser foot driver 50 to cause the presser foot 92 to reciprocate on the needle bar 72, that is, the presser foot 92 follows the reciprocating motion of the needle bar 72.

[0039] Among them, such as Figure 7 As shown, the presser foot 92 includes an upper presser foot 921, a lower presser foot 923, and a connecting part 922 connecting the upper presser foot 921 and the lower presser foot 923. The needle bar 72 passes through the connecting part 922. The upper presser foot 921 is provided with a stop part 9211. The buffer spring 93 is press-fitted between the stop part 9211 and the presser foot drive block 91.

[0040] The upper pressure foot 921 is rod-shaped, with its length set vertically. The upper end of the upper pressure foot 921 passes through the pressure foot drive block 91 and is fitted with a fastener 95, which can be a nut, or... Figure 7 The component shown enables the pressure foot 92 to be connected to the pressure foot drive block 91. The upper pressure foot portion 921 extends circumferentially to form the aforementioned stop portion 9211. A buffer spring 93 is sleeved on the upper pressure foot portion 921, and the buffer spring 93 is located between the stop portion 9211 and the pressure foot drive block 91, and the buffer spring 93 is press-fitted between the stop portion 9211 and the pressure foot drive block 91.

[0041] In practical applications, a machine needle is installed on the needle bar 72. Before the needle pierces the fabric, the presser foot 92 presses against the fabric. After the needle leaves the fabric, the presser foot 92 then leaves the fabric. Because the buffer spring 93 is pressed between the stop part 9211 and the presser foot drive block 91, the lower presser foot 923 makes elastic contact with the fabric. When the lower presser foot 923 presses against thick fabric, the compression degree of the buffer spring 93 increases; when the lower presser foot 923 presses against thin fabric, the compression degree of the buffer spring 93 decreases. This avoids rigid contact between the lower presser foot 923 and the fabric, suppresses the noise generated by the impact between the presser foot 92 and the fabric, and at the same time, prevents the presser foot 92 from being accidentally damaged, thus helping to extend the service life of the presser foot 92.

[0042] A return spring 94 is also fitted onto the upper presser foot 921, located below the stop 9211. When the lower presser foot 923 presses against the fabric, the return spring 94 is in a compressed state. After the needle leaves the fabric, the return spring 94 returns to its initial state from the compressed state, applying an upward force to the presser foot drive block 91, causing the presser foot drive block 91 to move upward, thereby causing the presser foot 92 to leave the fabric again. In other words, the return spring 94 serves to reset the presser foot 92.

[0043] The following combinations Figures 1-7 The machine head of the computerized embroidery machine will be further described below:

[0044] like Figure 1 and Figure 6 As shown, the first linkage mechanism 30 includes a first three-hole linkage 31, a first two-hole linkage 32, a second three-hole linkage 33, and a second two-hole linkage 34 connected in sequence. The second two-hole linkage 34 is connected to the presser foot driver 50 so that the presser foot driver 50 can perform linear reciprocating motion along the length of the guide rod 71. One of the three through holes of the first three-hole linkage 31 and the second two-hole linkage 34 is connected to the housing of the computer embroidery machine.

[0045] like Figure 6 As shown, the first three-hole connecting rod 31 has a first through hole 311, a second through hole 312 and a third through hole 313. The pressure foot cam 10 is hinged to the first through hole 311. One end of the first two-hole connecting rod 32 is hinged to the second through hole 312. The first rotating shaft passes through the third through hole 313 and is connected to the housing.

[0046] like Figure 6 As shown, the second three-hole connecting rod 33 has a fourth through hole 331, a fifth through hole 332, and a sixth through hole 333. The other end of the first two-hole connecting rod 32 is hinged to the fourth through hole 331, and one end of the second two-hole connecting rod 34 is hinged to the fifth through hole 332. The second rotating shaft passes through the sixth through hole 333 and is connected to the housing. The other end of the second two-hole connecting rod 34 is hinged to the pressure foot driver 50.

[0047] When the first linkage mechanism 30 is working, the presser foot cam 10 rotates, driving the first three-hole connecting rod 31, the first two-hole connecting rod 32, the second three-hole connecting rod 33, and the second two-hole connecting rod 34 in sequence. The second two-hole connecting rod 34 drives the presser foot driver 50 to reciprocate along the guide rod 71. The presser foot driver 50 is provided with a first groove 51, and the presser foot drive block 91 is fitted into the first groove 51, thereby driving the presser foot 92 to reciprocate along the needle bar 72. In this way, the first linkage mechanism 30 operates continuously and stably, allowing the presser foot driver 50 to reciprocate stably and reliably in the vertical direction, which in turn drives the presser foot 92 to reciprocate stably and reliably in the vertical direction, which is conducive to high-speed embroidery.

[0048] like Figure 4 As shown, the second linkage mechanism 40 includes a third three-hole linkage 41 and a third two-hole linkage 42. The third three-hole linkage 41 has a seventh through hole 411, an eighth through hole 412, and a ninth through hole 413. The needle bar cam 20 is hinged to the seventh through hole 411. One end of the third two-hole linkage 42 is hinged to the ninth through hole 413, and the other end is hinged to the needle bar driver 60. The third rotating shaft passes through the eighth through hole 412 and is connected to the housing.

[0049] When the second linkage mechanism 40 is working, the needle bar cam 20 rotates, driving the third three-hole linkage 41 and the third two-hole linkage 42 to move in sequence. The third two-hole linkage 42 drives the needle bar driver 60 to reciprocate along the guide rod 71. The needle bar driver 60 is provided with a second groove 61, and the needle bar drive block 80 is fitted into the second groove 61, so that the needle bar driver 60 drives the needle bar 72 to reciprocate in the vertical direction.

[0050] With this configuration, the first linkage mechanism 30 can independently cause the presser foot 92 to reciprocate vertically, and the second linkage mechanism 40 can independently cause the needle bar 72 to reciprocate vertically. The first linkage mechanism 30 and the second linkage mechanism 40 do not interfere with each other, which helps to reduce machine head noise and parts wear, while also improving the stability of the machine head movement.

[0051] like Figure 4 and Figure 5 As shown, the needle bar driver 60 has a protrusion 62 extending toward the presser foot driver 50, and the presser foot driver 50 has a mating part 52 that engages with the protrusion 62. When the needle bar driver 60 rotates in the horizontal direction, the protrusion 62 and the mating part 52 engage to stop the presser foot driver 50 from rotating in the horizontal direction.

[0052] In a specific embodiment, the needle bar driver 60 has a protrusion 62 extending toward the presser foot driver 50, and the protrusion 62 is a protruding post. The presser foot driver 50 has an arc-shaped surface that contacts the protruding post, and the curvature of the arc-shaped surface matches the curvature of the side of the protruding post. The arc-shaped surface is a mating part 52. The curvature of the arc-shaped surface is less than 180°.

[0053] In practical applications, the needle bar driver 60 can rotate around the guide rod 71. The protruding post of the needle bar driver 60 cooperates with the arc-shaped stop of the presser foot driver 50, and the needle bar driver 60 drives the presser foot driver 50 to rotate. With this configuration, the needle bar driver 60 and the presser foot driver 50 can rotate synchronously.

[0054] During the upward or downward movement of the presser foot driver 50 and the needle bar driver 60, the distance between them is variable. When the presser foot driver 50 is in its lowest position, the corresponding needle bar driver 60 is also in its lowest position, and the distance between them is minimal. At the current moment, the distance between them is d, where d ≤ L, and the length of the cam column is L. This helps the needle bar driver 60 and the presser foot driver 50 to rotate stably and synchronously.

[0055] This utility model also provides a computerized embroidery machine, including the aforementioned machine head. This computerized embroidery machine has the advantages of having a dedicated machine head.

[0056] This application allows the presser foot 92 to reciprocate vertically independently via the first linkage mechanism 30, and the needle bar 72 to reciprocate vertically independently via the second linkage mechanism 40. The first linkage mechanism 30 and the second linkage mechanism 40 do not interfere with each other, which helps reduce machine head noise and parts wear, while also improving the stability of the machine head movement. The buffer spring 93 is pressed between the stop part 9211 and the presser foot drive block 91, allowing the lower presser foot 923 to elastically contact the fabric. When the lower presser foot 923 presses against thick fabric, the compression degree of the buffer spring 93 increases; when the lower presser foot 923 presses against thin fabric, the compression degree of the buffer spring 93 decreases. This avoids rigid contact between the lower presser foot 923 and the fabric, suppressing noise generated by the impact between the presser foot 92 and the fabric. Simultaneously, it prevents accidental damage to the presser foot 92, helping to extend its service life.

[0057] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0058] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A machine head for a computerized embroidery machine, characterized in that, include: A presser foot driver (50) and a needle bar driver (60) are arranged vertically on a guide rod (71). The first linkage mechanism (30) is connected to the presser foot driver (50) so that the presser foot driver (50) moves in a straight line along the length direction of the guide rod (71); The second linkage mechanism (40) is connected to the needle bar driver (60) so that the needle bar driver (60) makes a linear reciprocating motion along the length direction of the guide rod (71); The needle bar (72) and the presser foot (92) are provided. The needle bar (72) is provided with a presser foot drive block (91). The presser foot drive block (91) is movably connected to the needle bar (72). The presser foot (92) is connected to the presser foot drive block (91). The presser foot drive block (91) cooperates with the presser foot driver (50) so that the presser foot (92) reciprocates on the needle bar (72). The presser foot (92) includes an upper presser foot (921), a lower presser foot (923), and a connecting part (922) connecting the upper presser foot (921) and the lower presser foot (923). The needle bar (72) passes through the connecting part (922). The upper presser foot (921) is provided with a stop part (9211), and a buffer spring (93) is press-fitted between the stop part (9211) and the presser foot drive block (91).

2. The machine head of the computerized embroidery machine according to claim 1, characterized in that, A return spring (94) is also fitted on the upper pressure foot (921), and the return spring (94) is located below the stop (9211).

3. The machine head of the computerized embroidery machine according to claim 1, characterized in that, The needle bar (72) is also provided with a needle bar drive block (80), and the needle bar drive block (80) and the presser foot drive block (91) are arranged vertically. The needle bar drive block (80) is fixedly connected to the needle bar (72). The needle bar drive block (80) cooperates with the needle bar driver (60) to make the needle bar (72) reciprocate in the vertical direction; wherein, the presser foot (92) reciprocates with the needle bar (72).

4. The machine head of the computerized embroidery machine according to claim 1, characterized in that, The first linkage mechanism (30) includes a first three-hole linkage (31), a first two-hole linkage (32), a second three-hole linkage (33), and a second two-hole linkage (34) connected in sequence. The second two-hole linkage (34) is connected to the presser foot driver (50) so that the presser foot driver (50) can reciprocate linearly along the length of the guide rod (71). Among them, one of the three through holes of the first three-hole connecting rod (31) and the second three-hole connecting rod (33) is connected to the housing of the computer embroidery machine.

5. The machine head of the computerized embroidery machine according to claim 1, characterized in that, The needle bar driver (60) has a protrusion (62) extending toward the presser foot driver (50), and the presser foot driver (50) has a mating part (52) that mates with the protrusion (62). When the needle bar driver (60) rotates in the horizontal direction, the protrusion (62) and the mating part (52) stop the movement, thereby causing the presser foot driver (50) to rotate in the horizontal direction.

6. The machine head of the computerized embroidery machine according to claim 5, characterized in that, The protrusion (62) is a protruding column.

7. The machine head of the computerized embroidery machine according to claim 6, characterized in that, The presser foot driver (50) is provided with an arc-shaped surface that contacts the protruding post. The curvature of the arc-shaped surface is adapted to the curvature of the side of the protruding post. The arc-shaped surface is the mating part (52).

8. The machine head of the computerized embroidery machine according to claim 7, characterized in that, The curvature of the arc surface is less than 180°.

9. The machine head of the computerized embroidery machine according to claim 7, characterized in that, The length of the protruding post is L. When the presser foot driver (50) is in its lowest position and the needle bar driver (60) is in its lowest position, the distance between them is d, and L≥d.

10. A computerized embroidery machine, characterized in that, The machine head of the computerized embroidery machine as described in any one of claims 1-9.

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