Presser foot driving device and computerized embroidery machine

Abstract

The utility model discloses a presser foot driving device and a computerized embroidery machine. The presser foot driving device comprises a presser foot cam assembly, a presser foot and a connecting rod mechanism, the presser foot cam assembly comprises a presser foot cam; and the presser foot does linear reciprocating motion. The connecting rod mechanism is located between the presser foot and the presser foot cam and comprises a first two-hole connecting rod, a second two-hole connecting rod and a first three-hole connecting rod, the presser foot cam, the first two-hole connecting rod and the first three-hole connecting rod are sequentially connected, and the presser foot cam is connected with the first two-hole connecting rod and the second two-hole connecting rod. The second two-hole connecting rod and the first two-hole connecting rod are arranged on the two opposite sides of the presser foot cam respectively. The first three-hole connecting rod directly or indirectly enables the presser foot to do linear reciprocating motion. The linkage mechanism acts coherently and stably, so that the presser foot can stably and reliably reciprocate in the vertical direction, and high-speed embroidery is facilitated; the acting force of the connecting rod mechanism is directly and completely applied to the presser foot, and the presser foot can flexibly reciprocate.

Description

Technical Field

[0001] The utility model relates to the technical field of computer embroidery machines, in particular to a presser foot driving device and a computer embroidery machine. Background Art

[0002] In the technical field of computer embroidery machines, the head of a computer embroidery machine includes a presser foot, a presser foot driver, a presser foot cam and a transmission mechanism, wherein the transmission mechanism is located between the presser foot cam and the presser foot driver and connects the two. The presser foot cam rotates, thereby causing the presser foot driver to move, and the presser foot driver drives the presser foot to move.

[0003] However, for high-speed embroidery machines, the faster the speed of the presser foot cam is, the lower the stability of the above-mentioned transmission mechanism will be after long-term high-speed operation. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a presser foot driving device and a computer embroidery machine, so that the presser foot can stably and reliably reciprocate in the vertical direction, which is conducive to high-speed embroidery.

[0005] A presser foot driving device according to a first aspect of the utility model comprises a presser foot cam assembly, a presser foot and a connecting rod mechanism.

[0006] The presser foot cam assembly comprises a presser foot cam; the presser foot performs linear reciprocating motion.

[0007] The connecting rod mechanism is located between the presser foot and the presser foot cam, and the connecting rod mechanism includes a first two-hole connecting rod, a second two-hole connecting rod and a first three-hole connecting rod. The presser foot cam, the first two-hole connecting rod and the first three-hole connecting rod are connected in sequence. The presser foot cam is connected to the first two-hole connecting rod and the second two-hole connecting rod. The second two-hole connecting rod and the first two-hole connecting rod are respectively arranged on opposite sides of the presser foot cam. The connection position of the presser foot cam and the first two-hole connecting rod coincides with the connection position of the presser foot cam and the second two-hole connecting rod.

[0008] The first three-hole connecting rod directly or indirectly causes the presser foot to perform linear reciprocating motion.

[0009] The present embodiment has a connecting rod mechanism that moves continuously and stably, so that the presser foot can stably and reliably reciprocate in the vertical direction, which is helpful for high-speed embroidery; in addition, the force of the connecting rod mechanism is directly and completely applied to the presser foot, so that the presser foot can flexibly reciprocate, avoiding the presser foot being driven by a presser foot driver in the related art, reducing production costs and improving the movement flexibility of the presser foot; the second two-hole connecting rod and the first two-hole connecting rod are respectively arranged on the opposite sides of the presser foot cam, so that the presser foot cam is subjected to forces from two directions, and the force effect of the presser foot cam is good, which is helpful to extend the service life of the high-speed moving presser foot cam; the presser foot cam is in its highest working position, and correspondingly, the presser foot is in its lowest working position. At the current moment, the angle between the second two-hole connecting rod and the first two-hole connecting rod is 180°, so that the first three-hole connecting rod is in a stationary state, and then the presser foot in the lowest working position is stationary, which is helpful to extend the time when the presser foot is in the lowest working position and improve the effect of the presser foot pressing against the cloth.

[0010] According to some embodiments of the utility model, the presser foot cam has a highest working position. When the presser foot cam is in its highest working position, the presser foot is correspondingly in its lowest working position, and the angle between the second two-hole connecting rod and the first two-hole connecting rod is 180°.

[0011] According to some embodiments of the present invention, the connecting rod mechanism further includes a third two-hole connecting rod and a second three-hole connecting rod.

[0012] The presser foot cam, the first two-hole connecting rod, the first three-hole connecting rod, the third two-hole connecting rod, and the second three-hole connecting rod are connected in sequence, and the second three-hole connecting rod is in contact with the presser foot.

[0013] Among them, one of the two holes of the second two-hole connecting rod, one of the three holes of the first three-hole connecting rod and the second three-hole connecting rod are all connected to the casing of the computer embroidery machine.

[0014] According to some embodiments of the utility model, a supporting hole is provided at one end of the second three-hole connecting rod, and a driving hole is provided at the other end, a connecting hole is provided between the driving hole and the supporting hole, the supporting hole is hinged to the housing, the connecting hole is hinged to the third two-hole connecting rod, an abutment is installed on the driving hole, and the abutment is in rolling contact with the presser foot.

[0015] According to some embodiments of the present invention, the abutment member is configured as a bearing or a pulley.

[0016] According to some embodiments of the present invention, a third rotating shaft is further included. The third rotating shaft passes through the supporting hole and is connected to the housing. An avoidance notch is provided on the third rotating shaft.

[0017] A computer embroidery machine according to the second aspect of the utility model comprises the presser foot driving device in the second aspect.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 1 is a schematic diagram of the structure of a presser foot driving device according to an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 axonometric drawing;

[0022] Figure 3 yes Figure 1 Exploded diagram of

[0023] Reference numerals:

[0024] The presser foot cam 10, the first two-hole connecting rod 20, the first through hole 21, the second through hole 22, the second two-hole connecting rod 30, the third through hole 31, and the fourth through hole 32;

[0025] A first three-hole connecting rod 40, a fifth through hole 41, a sixth through hole 42, a seventh through hole 43, and a third two-hole connecting rod 50;

[0026] The second three-hole connecting rod 60 , the supporting hole 61 , the connecting hole 62 , the driving hole 63 , the presser foot 70 , the third rotating shaft 80 , the avoiding gap 81 , and the needle rod 90 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0029] like Figure 1-Figure 3 As shown, a presser foot driving device according to an embodiment of the first aspect of the utility model comprises: a presser foot cam assembly, a presser foot 70 and a connecting rod mechanism.

[0030] The presser foot cam assembly comprises a presser foot cam 10; the presser foot 70 performs linear reciprocating motion.

[0031] The connecting rod mechanism is located between the presser foot 70 and the presser foot cam 10. The connecting rod mechanism includes a first two-hole connecting rod 20, a second two-hole connecting rod 30 and a first three-hole connecting rod 40. The presser foot cam 10, the first two-hole connecting rod 20 and the first three-hole connecting rod 40 are connected in sequence. The presser foot cam 10 is connected with the first two-hole connecting rod 20 and the second two-hole connecting rod 30. The second two-hole connecting rod 30 and the first two-hole connecting rod 20 are respectively arranged on opposite sides of the presser foot cam 10. The connection position of the presser foot cam 10 and the first two-hole connecting rod 20 and the connection position of the presser foot cam 10 and the second two-hole connecting rod 30 coincide.

[0032] The first three-hole connecting rod 40 directly or indirectly causes the presser foot 70 to perform linear reciprocating motion.

[0033] It should be noted that, in actual application, the head of the computer embroidery machine includes a housing and a presser foot driving device located in the housing. The presser foot driving device includes a presser foot cam assembly, a connecting rod mechanism, a presser foot 70 and a needle bar 90. The presser foot cam assembly includes a presser foot cam 10. The needle bar 90 is arranged in the vertical direction, and the presser foot 70 is sleeved on the needle bar 90, and the presser foot 70 reciprocates in the vertical direction.

[0034] The connecting rod mechanism is located between the presser foot 70 and the presser foot cam 10. The presser foot cam 10 directly or indirectly reciprocates the presser foot 70 in the vertical direction through the connecting rod mechanism. Specifically:

[0035] In one embodiment, the connecting rod mechanism includes a first two-hole connecting rod 20, a second two-hole connecting rod 30 and a first three-hole connecting rod 40. The presser foot cam 10, the first two-hole connecting rod 20 and the first three-hole connecting rod 40 are connected in sequence, the presser foot cam 10 is connected with the first two-hole connecting rod 20 and the second two-hole connecting rod 30, the second two-hole connecting rod 30 and the first two-hole connecting rod 20 are respectively arranged on opposite sides of the presser foot cam 10, and the connection position of the presser foot cam 10 and the first two-hole connecting rod 20 and the connection position of the presser foot cam 10 and the second two-hole connecting rod 30 coincide.

[0036] like Figure 3 As shown, the first two-hole connecting rod 20 has a first through hole 21 and a second through hole 22, and the second two-hole connecting rod 30 has a third through hole 31 and a fourth through hole 32. The pin can pass through the first through hole 21 of the first two-hole connecting rod 20, the presser foot cam 10 and the fourth through hole 32 of the second two-hole connecting rod 30 in sequence, and the second two-hole connecting rod 30 and the first two-hole connecting rod 20 are respectively arranged on the left and right sides of the presser foot cam 10. In this way, the presser foot cam 10 is subjected to forces from both left and right directions, and the force effect of the presser foot cam 10 is good, which helps to extend the service life of the high-speed moving presser foot cam 10. Among them, the first rotating shaft passes through the third through hole 31 of the second two-hole connecting rod 30 and is connected to the housing.

[0037] One of the three through holes of the first three-hole connecting rod 40 is hinged to the housing. Figure 3 As shown, the first three-hole connecting rod 40 has a fifth through hole 41, a sixth through hole 42 and a seventh through hole 43, the second through hole 22 of the first two-hole connecting rod 20 is hinged with the fifth through hole 41, and the second rotating shaft passes through the seventh through hole 43 and is connected to the housing. Among them, a supporting member (not marked) can be installed on the sixth through hole 42, and the supporting member is in rolling contact with the presser foot 70.

[0038] When the link mechanism works, the presser foot cam 10 rotates, and then the first two-hole link 20 and the first three-hole link 40 are linked in sequence, and the abutment member on the first three-hole link 40 makes the presser foot 70 reciprocate along the needle bar 90. In this way, the link mechanism moves continuously and stably, so that the presser foot 70 can reciprocate stably and reliably in the vertical direction, which is conducive to high-speed embroidery.

[0039] In another embodiment, the connecting rod mechanism includes a first two-hole connecting rod 20, a second two-hole connecting rod 30, a first three-hole connecting rod 40, a third two-hole connecting rod 50 and a second three-hole connecting rod 60. The presser foot cam 10, the first two-hole connecting rod 20, the first three-hole connecting rod 40, the third two-hole connecting rod 50 and the second three-hole connecting rod 60 are connected in sequence, the presser foot cam 10 is connected with the first two-hole connecting rod 20 and the second two-hole connecting rod 30, the second two-hole connecting rod 30 and the first two-hole connecting rod 20 are respectively arranged on opposite sides of the presser foot cam 10, and the connection position of the presser foot cam 10 and the first two-hole connecting rod 20 and the connection position of the presser foot cam 10 and the second two-hole connecting rod 30 coincide. The second three-hole connecting rod 60 contacts the presser foot 70.

[0040] like Figure 3 As shown, a support hole 61 is provided at one end of the second three-hole connecting rod 60, a driving hole 63 is provided at the other end, and a connecting hole 62 is provided between the driving hole 63 and the support hole 61. The third rotating shaft 80 passes through the support hole 61 and is connected to the housing; the connecting hole 62 is hinged to one end of the third two-hole connecting rod 50; a supporting member is installed on the driving hole 63, and the supporting member is in rolling contact with the presser foot 70.

[0041] When the link mechanism is working, the presser foot cam 10 rotates, and then the first two-hole link 20, the first three-hole link 40, the third two-hole link 50 and the second three-hole link 60 are connected in sequence, and the abutment member on the second three-hole link 60 enables the presser foot 70 to reciprocate along the needle bar 90. In this way, the link mechanism operates continuously and stably, so that the presser foot 70 can stably and reliably reciprocate in the vertical direction, which is conducive to high-speed embroidery.

[0042] According to some embodiments of the present invention, the presser foot cam 10 has a highest working position, such as Figure 1 As shown, the presser foot cam 10 is in its highest working position, and correspondingly, the presser foot 70 is in its lowest working position. The angle between the second two-hole connecting rod 30 and the first two-hole connecting rod 20 is 180°.

[0043] It should be noted that the presser foot cam 10 has a highest working position and a lowest position. Figure 1 As shown, the presser foot cam 10 is in its highest working position, and correspondingly, the presser foot 70 is in its lowest working position; the presser foot cam 10 is in its lowest working position, and correspondingly, the presser foot 70 is in its highest working position.

[0044] like Figure 1As shown, the presser foot cam 10 is in its highest working position, and correspondingly, the presser foot 70 is in its lowest working position. At this moment, the angle between the second two-hole connecting rod 30 and the first two-hole connecting rod 20 is 180°, so that the first three-hole connecting rod 40 is in a stationary state, and thus the presser foot 70 in the lowest working position is stationary, which helps to extend the time that the presser foot 70 is in the lowest working position and improve the effect of the presser foot 70 pressing against the cloth.

[0045] According to some embodiments of the utility model, the abutment member is configured as a bearing or a pulley. When the abutment member moving at high speed contacts the presser foot 70, the two are in rolling contact, which helps to reduce the impact force between the two.

[0046] According to some embodiments of the present invention, a relief notch 81 is provided on the third rotating shaft 80. Figure 2 and Figure 3 As shown, part of the first three-hole connecting rod 40 is located in the avoidance gap 81. On the one hand, the avoidance gap 81 prevents the first three-hole connecting rod 40 from interfering with the third rotating shaft 80 and affecting the movement of the second three-hole connecting rod 60. On the other hand, it plays a limiting role, limiting the swing amplitude of the first three-hole connecting rod 40, and then indirectly limiting the movement amplitude of the second three-hole connecting rod 60, so that the presser foot 70 moves within a preset stroke.

[0047] According to the second aspect of the present invention, a computer embroidery machine includes the presser foot driving device of the first aspect. The computer embroidery machine has the advantages of the presser foot driving device, and the connecting rod mechanism moves continuously and stably, so that the presser foot 70 can stably and reliably reciprocate in the vertical direction, which is conducive to high-speed embroidery.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0050] In the description of the present invention, "plurality" means two or more.

[0051] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0052] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A presser foot driving device, characterized in that: include: A presser foot cam assembly, the presser foot cam assembly comprising a presser foot cam (10); A presser foot (70); the presser foot (70) performs linear reciprocating motion; A connecting rod mechanism; the connecting rod mechanism is located between the presser foot (70) and the presser foot cam (10), the connecting rod mechanism comprises a first two-hole connecting rod (20), a second two-hole connecting rod (30) and a first three-hole connecting rod (40), the presser foot cam (10), the first two-hole connecting rod (20) and the first three-hole connecting rod (40) are connected in sequence, the presser foot cam (10) is connected with the first two-hole connecting rod (20) and the second two-hole connecting rod (30), the second two-hole connecting rod (30) and the first two-hole connecting rod (20) are respectively arranged on opposite sides of the presser foot cam (10), the connection position of the presser foot cam (10) and the first two-hole connecting rod (20) and the connection position of the presser foot cam (10) and the second two-hole connecting rod (30) are overlapped, The first three-hole connecting rod (40) directly or indirectly causes the presser foot (70) to perform linear reciprocating motion.

2. The presser foot driving device according to claim 1, characterized in that: The presser foot cam (10) has a highest working position. When the presser foot cam (10) is in its highest working position, the presser foot (70) is correspondingly in its lowest working position. The included angle between the second two-hole connecting rod (30) and the first two-hole connecting rod (20) is 180°.

3. The presser foot driving device according to claim 1, characterized in that: The connecting rod mechanism further comprises a third two-hole connecting rod (50) and a second three-hole connecting rod (60). The presser foot cam (10), the first two-hole connecting rod (20), the first three-hole connecting rod (40), the third two-hole connecting rod (50), and the second three-hole connecting rod (60) are connected in sequence, and the second three-hole connecting rod (60) is in contact with the presser foot (70). One of the two holes of the second two-hole connecting rod (30), and one of the three holes of the first three-hole connecting rod (40) and the second three-hole connecting rod (60) are all connected to the casing of the computer embroidery machine.

4. The presser foot driving device according to claim 3, characterized in that: A supporting hole (61) is provided at one end of the second three-hole connecting rod (60), and a driving hole (63) is provided at the other end; a connecting hole (62) is provided between the driving hole (63) and the supporting hole (61); the supporting hole (61) is hinged to the housing; the connecting hole (62) is hinged to the third two-hole connecting rod (50); a supporting member is installed on the driving hole (63), and the supporting member is in rolling contact with the presser foot (70).

5. The presser foot driving device according to claim 4, characterized in that: The abutment member is configured as a bearing or a pulley.

6. The presser foot driving device according to claim 4, characterized in that: It also comprises a third rotating shaft (80), the third rotating shaft (80) passes through the supporting hole (61) and is connected to the housing, and an avoidance notch (81) is provided on the third rotating shaft (80).

7. A computer embroidery machine, characterized in that: The invention comprises the presser foot driving device according to any one of claims 1 to 6.

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