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 driver and a connecting rod mechanism, the presser foot driver does linear reciprocating motion; the connecting rod mechanism comprises a first two-hole connecting rod, a second two-hole connecting rod, a first three-hole connecting rod, a third two-hole connecting rod, a second three-hole connecting rod and a fourth two-hole connecting rod which are connected in sequence, and the fourth two-hole connecting rod is connected with the presser foot driver, so that the presser foot driver does linear reciprocating motion. Wherein one of the three through holes of the first three-hole connecting rod and the second three-hole connecting rod is connected to a shell of the computerized embroidery machine. The action of the connecting rod mechanism is coherent and stable, so that the presser foot driver can stably and reliably reciprocate along the vertical direction, and high-speed embroidery is facilitated; the quick-return characteristic is achieved, the return stroke is faster than the forward stroke, the speed of the non-working stroke is higher, the non-working time is shortened, and the embroidery efficiency can be improved. The presser foot driver is located at the lowest working position, so that the time for the presser foot driver to be located at the lowest working position is prolonged.

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 driver can stably and reliably reciprocate in the vertical direction, thereby driving the presser foot to 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 driver and a connecting rod mechanism.

[0006] The presser foot driver performs linear reciprocating motion;

[0007] The connecting rod mechanism includes a first two-hole connecting rod, a second two-hole connecting rod, a first three-hole connecting rod, a third two-hole connecting rod, a second three-hole connecting rod and a fourth two-hole connecting rod which are connected in sequence. The fourth two-hole connecting rod is connected to the presser foot driver so that the presser foot driver performs linear reciprocating motion.

[0008] Wherein, one of the three through holes of the first three-hole connecting rod and the second three-hole connecting rod is connected to the casing of the computer embroidery machine.

[0009] This embodiment uses the connecting rod mechanism to move continuously and stably, so that the presser foot driver can stably and reliably reciprocate in the vertical direction, thereby driving the presser foot to stably and reliably reciprocate in the vertical direction, which is helpful for high-speed embroidery; it has a quick return characteristic, and the time for the presser foot driver to move from the lowest working position to the highest working position is T1, and the time for the presser foot driver to move from the highest working position to the lowest working position is T2, T2>T1. In this way, the return journey is faster than the forward journey, the non-working stroke speed is faster, the non-working time is shortened, and it is helpful to improve the embroidery efficiency. The presser foot driver is in the lowest working position, and the angle between the line connecting the center of the third through hole and the center of the second through hole and the third two-hole connecting rod is 180°. At this moment, the second three-hole connecting rod is in a static state, thereby making the presser foot driver in the lowest working position stationary, which is helpful to extend the time when the presser foot driver 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 present invention, the presser foot driver has a highest working position and a lowest working position.

[0011] The time for the presser foot driver to move from the lowest working position to the highest working position is T1, and the time for the presser foot driver to move from the highest working position to the lowest working position is T2, and T2>T1.

[0012] According to some embodiments of the present invention, the first three-hole connecting rod has a first through hole, a second through hole and a third through hole, the second two-hole connecting rod is hinged to the first through hole, the third two-hole connecting rod is hinged to the second through hole, and the housing is hinged to the third through hole.

[0013] The presser foot driver is in the lowest working position, and the angle between the line connecting the center of the third through hole and the center of the second through hole and the third two-hole connecting rod is 180°.

[0014] According to some embodiments of the present invention, the first through hole, the second through hole and the third through hole are arranged in an isosceles triangle or an equilateral triangle.

[0015] According to some embodiments of the utility model, the presser foot driver is in the lowest working position, and the hinged positions of the third two-hole connecting rod and the second three-hole connecting rod are arranged away from the first through hole;

[0016] The presser foot driver is in the highest working position, and the hinged positions of the third two-hole connecting rod and the second three-hole connecting rod are arranged close to the first through hole.

[0017] According to some embodiments of the present invention, at least one of the first through hole, the second through hole and the third through hole is configured as a clamp structure.

[0018] According to some embodiments of the present utility model, the first rotating shaft passes through the third through hole and is connected to the housing, and a bearing is provided between the third through hole and the first rotating shaft.

[0019] A computer embroidery machine according to the second aspect of the utility model comprises the presser foot driving device in the second aspect.

[0020] 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

[0021] 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:

[0022] Figure 1 The structure diagram of the presser foot driving device according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 2 The structure diagram of the presser foot driving device according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0024] Figure 3 yes Figure 1 axonometric drawing;

[0025] Figure 4 yes Figure 1 Exploded diagram of

[0026] Figure 5 is a schematic diagram of a hinged four-bar mechanism according to an embodiment of the utility model;

[0027] Reference numerals:

[0028] A first two-hole connecting rod 10, a second two-hole connecting rod 20, a first three-hole connecting rod 30, a first through hole 31, a second through hole 32, a third through hole 33, a first portion 301, and a second portion 302,

[0029] The third two-hole connecting rod 40, the second three-hole connecting rod 50, the fourth through hole 51, the fifth through hole 52, the sixth through hole 53,

[0030] The fourth two-hole connecting rod 60, the presser foot driver 70, the presser foot 80, the guide rod 91, and the needle rod 92. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] like Figure 1-Figure 5 As shown, a presser foot driving device according to an embodiment of the first aspect of the utility model comprises: a presser foot driver 70 and a connecting rod mechanism.

[0034] The presser foot driver 70 performs linear reciprocating motion.

[0035] The connecting rod mechanism includes a first two-hole connecting rod 10, a second two-hole connecting rod 20, a first three-hole connecting rod 30, a third two-hole connecting rod 40, a second three-hole connecting rod 50 and a fourth two-hole connecting rod 60 which are connected in sequence. The fourth two-hole connecting rod 60 is connected to a presser foot driver 70 so that the presser foot driver 70 performs a linear reciprocating motion.

[0036] Among them, one of the three through holes of the first three-hole connecting rod 30 and the second three-hole connecting rod 50 is connected to the casing of the computer embroidery machine.

[0037] 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 driver 70, a connecting rod mechanism, a presser foot 80, a guide rod 91 and a needle bar 92. The guide rod 91 and the needle bar 92 are arranged in the vertical direction, the presser foot driver 70 is sleeved on the guide rod 91, and the presser foot driver 70 reciprocates in the vertical direction; the presser foot 80 is sleeved on the needle bar 92, the presser foot driver 70 cooperates with the presser foot 80, and the presser foot driver 70 drives the presser foot 80 to reciprocate in the vertical direction.

[0038] The connecting rod mechanism drives the presser foot driver 70 to reciprocate in the vertical direction. Specifically:

[0039] The connecting rod mechanism includes a first two-hole connecting rod 10, a second two-hole connecting rod 20, a first three-hole connecting rod 30, a third two-hole connecting rod 40, a second three-hole connecting rod 50 and a fourth two-hole connecting rod 60 which are connected in sequence. The fourth two-hole connecting rod 60 is connected to the presser foot driver 70 so that the presser foot driver 70 performs linear reciprocating motion.

[0040] like Figure 3 and Figure 4 As shown, the first three-hole connecting rod 30 has a first through hole 31, a second through hole 32 and a third through hole 33, the second two-hole connecting rod 20 is hinged to the first through hole 31, one end of the third two-hole connecting rod 40 is hinged to the second through hole 32, and the first rotating shaft passes through the third through hole 33 to be connected to the housing.

[0041] like Figure 3 and Figure 4 As shown, the second three-hole connecting rod 50 has a fourth through hole 51, a fifth through hole 52 and a sixth through hole 53, the other end of the third two-hole connecting rod 40 is hinged to the fourth through hole 51, one end of the fourth two-hole connecting rod 60 is hinged to the fifth through hole 52, and the second rotating shaft passes through the sixth through hole 53 and is connected to the housing. The other end of the fourth two-hole connecting rod 60 is hinged to the presser foot driver 70.

[0042] When the connecting rod mechanism is working, one end of the first two-hole connecting rod 10 is hinged, the first two-hole connecting rod 10 rotates, and then the second two-hole connecting rod 20, the first three-hole connecting rod 30, the third two-hole connecting rod 40, the second three-hole connecting rod 50 and the fourth two-hole connecting rod 60 are linked in sequence, the fourth two-hole connecting rod 60 drives the presser foot driver 70 to reciprocate along the guide rod 91, and the presser foot driver 70 drives the presser foot 80 to reciprocate along the needle bar 92. In this way, the connecting rod mechanism operates continuously and stably, so that the presser foot driver 70 can stably and reliably reciprocate in the vertical direction, and then drives the presser foot 80 to stably and reliably reciprocate in the vertical direction, which is conducive to high-speed embroidery.

[0043] According to some embodiments of the present invention, the presser foot driver 70 has a highest working position and a lowest working position. The time for the presser foot driver 70 to move from the lowest working position to the highest working position is T1, and the time for the presser foot driver 70 to move from the highest working position to the lowest working position is T2, and T2>T1.

[0044] It should be noted that if Figure 1 As shown, the area between the third through hole 33 and the first through hole 31 of the first three-hole connecting rod 30 is defined as the first part 301 , and the area between the third through hole 33 and the second through hole 32 of the first three-hole connecting rod 30 is defined as the second part 302 .

[0045] like Figure 5As shown, one end of the first two-hole connecting rod 10 is hinged, and the first two-hole connecting rod 10 rotates. The first part 301 swings, and one end of the second two-hole connecting rod 20 is hinged to the other end of the first two-hole connecting rod 10, and the other end of the second two-hole connecting rod 20 is hinged to the first through hole 31 of the first part 301. Then the first two-hole connecting rod 10, the second two-hole connecting rod 20 and the first part 301 form a hinge four-bar mechanism, and the hinge four-bar mechanism has a quick return characteristic. That is to say, the time for the presser foot driver 70 to go from the lowest working position to the highest working position is T1, and the time for the presser foot driver 70 to go from the highest working position to the lowest working position is T2, and T2>T1.

[0046] In this way, the return journey is faster than the outward journey, the non-working journey speed is faster, the non-working time is shortened, and it is helpful to improve the embroidery efficiency.

[0047] Furthermore, if Figure 1 As shown, the presser foot driver 70 is in the lowest working position, and the angle between the line connecting the center of the third through hole 33 and the center of the second through hole 32 and the third two-hole connecting rod 40 is 180°. At this moment, the second three-hole connecting rod 50 is in a stationary state, thereby making the presser foot driver 70 in the lowest working position stationary, which helps to extend the time that the presser foot driver 70 is in the lowest working position and improve the effect of the presser foot 80 pressing against the cloth.

[0048] Furthermore, the first through hole 31, the second through hole 32 and the third through hole 33 can be arranged in an isosceles triangle, and the first through hole 31, the second through hole 32 and the third through hole 33 can be arranged in an equilateral triangle. Such an arrangement is conducive to the processing and manufacturing of the first three-hole connecting rod 30, thereby reducing the processing cost of the first three-hole connecting rod 30.

[0049] Wherein, at least one of the first through hole 31 , the second through hole 32 and the third through hole 33 is configured as a clamp structure.

[0050] In practical applications, the space inside the housing is relatively compact, which is not conducive to the assembly of the connecting rods in the connecting rod mechanism. Based on this, at least one of the first through hole 31, the second through hole 32 and the third through hole 33 can be set as a hoop structure to reduce the assembly difficulty and improve the assembly efficiency of the connecting rod mechanism.

[0051] In a specific embodiment, Figure 4 As shown, the second two-hole connecting rod 20 is hinged to the first through hole 31 through a bearing, the first rotating shaft passes through the third through hole 33 and is connected to the housing, and another bearing is provided between the first rotating shaft and the third through hole 33.

[0052] The second through hole 32 is configured as a hoop structure, and one end of the third two-hole connecting rod 40 is inserted into the hoop structure.

[0053] Further, the presser foot driver 70 is in the lowest working position, such as Figure 1 As shown, the hinge positions of the third two-hole connecting rod 40 and the second three-hole connecting rod 50 are arranged away from the first through hole 31.

[0054] The presser foot driver 70 is in the highest working position. Figure 2 As shown, the hinged position of the third two-hole connecting rod 40 and the second three-hole connecting rod 50 is arranged close to the first through hole 31. This arrangement helps to suppress the swing amplitude of the second three-hole connecting rod 50, and then the second three-hole connecting rod 50 causes the shaking degree of the presser foot driver 70 to be greatly reduced, which helps the presser foot driver 70 to stably and reliably reciprocate in the vertical direction.

[0055] In addition, the second three-hole connecting rod 50 is V-shaped, and at least one of the third through hole 33 , the fourth through hole 51 and the fifth through hole 52 is configured as a clamp structure.

[0056] The connection method of the fourth through hole 51 may refer to the connection method of the first through hole 31 described above, and the connection method of the sixth through hole 53 may refer to the connection method of the third through hole 33 described above, so it will not be repeated here.

[0057] 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 driver 70 can stably and reliably reciprocate in the vertical direction, thereby driving the presser foot 80 to stably and reliably reciprocate in the vertical direction, which is conducive to high-speed embroidery.

[0058] 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.

[0059] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0060] In the description of the present invention, "plurality" means two or more.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 driver (70); the presser foot driver (70) performs linear reciprocating motion; A connecting rod mechanism; the connecting rod mechanism comprises a first two-hole connecting rod (10), a second two-hole connecting rod (20), a first three-hole connecting rod (30), a third two-hole connecting rod (40), a second three-hole connecting rod (50) and a fourth two-hole connecting rod (60) which are connected in sequence; the fourth two-hole connecting rod (60) is connected to the presser foot driver (70) so that the presser foot driver (70) performs linear reciprocating motion. Wherein, one of the three through holes of the first three-hole connecting rod (30) and the second three-hole connecting rod (50) is connected to the casing of the computer embroidery machine.

2. The presser foot driving device according to claim 1, characterized in that: The presser foot driver (70) has a highest working position and a lowest working position. The time for the presser foot driver (70) to move from the lowest working position to the highest working position is T1, and the time for the presser foot driver (70) to move from the highest working position to the lowest working position is T2, and T2>T1.

3. The presser foot driving device according to claim 2, characterized in that: The first three-hole connecting rod (30) has a first through hole (31), a second through hole (32) and a third through hole (33); the second two-hole connecting rod (20) is hinged to the first through hole (31); the third two-hole connecting rod (40) is hinged to the second through hole (32); and the housing is hinged to the third through hole (33). The presser foot driver (70) is in the lowest working position, and the angle between a line connecting the center of the third through hole (33) and the center of the second through hole (32) and the third two-hole connecting rod (40) is 180°.

4. The presser foot driving device according to claim 3, characterized in that: The first through hole (31), the second through hole (32) and the third through hole (33) are arranged in the form of an isosceles triangle or an equilateral triangle.

5. The presser foot driving device according to claim 4, characterized in that: The presser foot driver (70) is in the lowest working position, and the hinge positions of the third two-hole connecting rod (40) and the second three-hole connecting rod (50) are arranged away from the first through hole (31). The presser foot driver (70) is in the highest working position, and the hinged positions of the third two-hole connecting rod (40) and the second three-hole connecting rod (50) are arranged close to the first through hole (31).

6. The presser foot driving device according to claim 4, characterized in that: At least one of the first through hole (31), the second through hole (32) and the third through hole (33) is configured as a hoop structure.

7. The presser foot driving device according to claim 3, characterized in that: The first rotating shaft passes through the third through hole (33) and is connected to the housing, and a bearing is provided between the third through hole (33) and the first rotating shaft.

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

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