Driving mechanism for moving button clamping and button clamping in button sewing machine

Abstract

The application provides a driving mechanism for the movement of a button clamping clamp in a button sewing machine, and belongs to the technical field of sewing. The driving mechanism for the movement of the button clamping clamp in the button sewing machine solves the technical problem of low stability of the movement of the button clamping clamp in the existing button sewing machine when swinging back and forth at high speed. The driving mechanism for the movement of the button clamping clamp in the button sewing machine comprises a machine shell, a lower shaft and a button clamping clamp. A clamping seat is arranged above the lower shaft on the machine shell. The rear end of the button clamping clamp is connected with the rear end of the clamping seat. The driving mechanism comprises a swing rod which is rotatably connected in the machine shell through a rotating shaft. The front end of the swing rod is provided with an avoiding connector. The lower shaft passes through the avoiding connector. The upper end of the avoiding connector is movably connected with the front end of the clamping seat. The application has the advantages of compact structure and stable movement of the button.

Description

Technical Field

[0001] This invention belongs to the field of sewing technology and relates to a button attaching machine, particularly a drive mechanism for moving the button clamp in the button attaching machine. Background Technology

[0002] A button sewing machine is a sewing tool used to sew buttons. Buttons are generally set with four or two holes. The spacing between the holes is different for different buttons. When sewing, the button is held by the button clamp of the button sewing machine. By moving the button clamp, the needle passes through different holes to sew the button.

[0003] In addition to basic sewing actions, button attaching machines must also achieve horizontal movement and lifting of the button clamp, as well as automatic thread trimming. Therefore, the internal space of a button attaching machine is compact, and the lower shaft and rotary hook positions are fixed. To avoid interference with the lower shaft, the drive mechanisms for attaching the button clamp on the Y-axis are currently located far from the lower shaft and the button clamp's attaching station. For example, in a button attaching machine disclosed in Chinese patent literature [application number 202321669856.9], the feeding motor and drive rod assembly move the feeding plate to move the button clamp. Both the feeding motor and drive rod assembly are located at the end far from the button clamp's attaching station. Located behind the lower shaft; another example is a button-attaching machine [application number 202410682529.X], in which a stepper motor and a swing arm drive the feeding slide to move the button clamp on the feeding slide, wherein the stepper motor and the swing arm are both located at the end away from the button clamp's button-attaching position, located behind the lower shaft; yet another example is a drive structure for the button clamping device of a button-attaching machine [application number 202322246525.0], in which a drive motor and a connecting rod drive the clamping device to move along the Y-axis, the connecting rod is connected to the rear end of the clamp seat of the clamping device, and the position of the connecting rod is set above the worktable surface of the machine housing due to insufficient internal space. As can be seen from the above, in the prior art, the connection position for driving the Y-axis movement is located behind the hinge position between the button clamp and the button holder in order to avoid the lower shaft. This results in a longer overall length of the button attaching machine and a larger space occupation. The movement in the Y-axis direction is achieved by swinging. Since the connection position is far from the button attaching station at the front end of the button clamp, the displacement in the Y-axis direction will result in a smaller swing angle due to the longer swing arm. This leads to lower stability when swinging back and forth at high speed, increasing the generation of vibration and noise. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a driving mechanism for the movement of the button clamp in a button attaching machine. The technical problem solved by this invention is that it has a compact structure and makes the button movement more stable.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A driving mechanism for moving a button clamp in a button attaching machine is disclosed. The button attaching machine includes a housing, a lower shaft, and a button clamp. A button clamp seat is provided on the housing above the lower shaft. The rear end of the button clamp is connected to the rear end of the button clamp seat. The driving mechanism includes a rocker arm, which is rotatably connected to the housing via a rotating shaft. A clearance connector is provided at the front end of the rocker arm. The lower shaft passes through the clearance connector, and the upper end of the clearance connector is movably connected to the front end of the button clamp seat.

[0007] The swing arm rotates around the pivot to avoid the connector head, which drives the snap clamp seat to swing. This allows the snap clamp seat to move the snap fastener in the Y-axis direction. The avoidance of the connector head allows the lower shaft to pass through, avoiding assembly interference during the assembly of the lower shaft. In other words, it enables the swing arm to move to the front end of the snap clamp seat. The driving position in the Y-axis direction is located at the front end of the snap clamp seat, between the rear end of the snap fastener and the snap fastening station. The driving position of the connector head and the snap clamp seat is close to the snap fastening station. This means that the swing arm that drives the snap clamp seat to swing is shorter. The swing arm can move the front end of the snap fastener in the Y-axis direction by swinging at a larger angle. This allows for a more stable drive of the snap clamp seat to move the snap fastener back and forth, reducing vibration and noise during snap fastening.

[0008] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp is C-shaped, with the notch facing left, right, or downwards. The lower shaft passes through the notch of the button clamp. This structure allows the button clamp to avoid the lower shaft while still connecting with the button holder.

[0009] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp is equipped with a clearance hole in the bypass connector, and the lower shaft passes through the clearance hole. The diameter of the clearance hole is larger than the diameter of the lower shaft. This structure allows the bypass connector to avoid the lower shaft and connect with the button clamp seat.

[0010] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp is located directly below the lower shaft. This location, with the pivot point directly below the lower shaft, means the rotation center of the swing arm is on the central axis of the button-attaching station. This ensures symmetrical displacement on both sides in the Y-axis direction, further reducing vibration during high-speed back-and-forth swinging.

[0011] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp has a strip-shaped guide hole at the front end of the button clamp seat along the axial direction of the lower shaft. The upper end of the clearance connector has a connecting shaft, and a slider is connected to the connecting shaft. The slider is slidably connected within the strip-shaped guide hole. When the swing arm swings, the slider can slide within the strip-shaped guide hole to achieve a movable connection between the clearance connector and the button clamp seat.

[0012] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp includes a Y-axis drive motor fixed to one side of the machine housing. The swing arm comprises a connecting section and a swing section, with the swing section located below the lower shaft. The connecting section bends relative to the swing section towards the Y-axis drive motor. The Y-axis drive motor and the end of the connecting section are connected by a two-bar linkage assembly. The Y-axis drive motor is positioned on the side of the main shaft, reducing the overall length and making the button-attaching machine more compact. The Y-axis drive motor drives the swing arm to swing back and forth via the two-bar linkage assembly, resulting in a simple and efficient structure.

[0013] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp further includes a push-pull rod located directly above the lower shaft. The push-pull rod passes through the machine housing and can move back and forth axially. The rear end of the button clamp seat is rotatably connected to the front end of the push-pull rod. The push-pull rod enables the button clamp seat to move back and forth along the X-axis, allowing the button clamp to move freely along both the X and Y axes.

[0014] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp is characterized by an X-axis drive motor fixed to one side of the machine housing. A rack is axially mounted on the push-pull rod, and drive teeth are fixed to the motor shaft of the X-axis drive motor. These drive teeth mesh with the rack on the push-pull rod. The X-axis drive motor's placement on the side of the main shaft reduces the overall length, resulting in a more compact structure. The X-axis drive motor rotates the drive teeth back and forth, and the gear transmission between the drive teeth and the rack on the push-pull rod drives the push-pull rod to move back and forth. This design is simple and efficient.

[0015] In the aforementioned button-attaching machine, the drive mechanism for moving the button clamp includes a fixed mounting base plate inside the machine housing. An elongated guide hole is formed on the mounting base plate along the axial direction of the lower shaft. A guide slider is slidably connected within the guide hole, and a hinge shaft is fixedly connected to the guide slider. The button clamp seat is mounted on the mounting base, and the hinge shaft is rotatably connected to the rear end of the button clamp seat. The front end of the push-pull rod is rotatably connected to the hinge shaft. The mounting base plate guides the button clamp seat to move axially along the lower shaft through the guide hole and guide slider, and guides the back-and-forth swing of the button clamp seat through the hinge shaft, achieving stability during high-speed movement of the button clamp seat, thereby improving the stability of the button clamp during button attachment.

[0016] Compared with existing technologies, the drive mechanism for moving the button clamp in this button attaching machine has the advantages of making the overall structure of the button attaching machine more compact, increasing the stability during button attaching, and reducing vibration and noise generation. Attached Figure Description

[0017] Figure 1 This is a 3D structural diagram of a button-attaching machine.

[0018] Figure 2 This is a three-dimensional structural diagram of a button-attaching machine from another perspective.

[0019] Figure 3 This is a three-dimensional structural diagram of the drive mechanism and the housing during assembly.

[0020] Figure 4 This is a three-dimensional structural diagram of the drive mechanism.

[0021] Figure 5 This is a side view of the drive mechanism.

[0022] Figure 6 This is a bottom view of the structure of this drive mechanism.

[0023] Figure 7 This is a three-dimensional structural diagram of the assembly of the clip base and the mounting base plate.

[0024] Figure 8 This is a three-dimensional structural diagram of the assembly of the pendulum rod and the two-link assembly in Embodiment 1.

[0025] Figure 9 This is a three-dimensional structural diagram of the assembly of the pendulum rod and the two-link assembly in Embodiment 2.

[0026] Figure 10 This is a three-dimensional structural diagram of the assembly of the pendulum rod and the two-link assembly in Embodiment 3.

[0027] In the diagram, 1. Housing; 11. Lower shaft; 12. Fastener clamp; 13. Fastener station; 2. Fastener holder; 21. Strip guide hole; 3. Y-axis drive motor; 31. Two-bar linkage assembly; 32. Short rod; 33. Long rod; 4. Swing rod; 4a. Connecting section; 4b. Swinging section; 4b1. Rotating shaft; 41. Connecting head; 411. Clearance section; 412. Vertical section; 413. Connecting section; 414. Clearance hole; 42. Connecting shaft; 43. Slider; 5. X-axis drive motor; 51. Drive gear; 6. Push-pull rod; 61. Rack; 7. Mounting base plate; 71. Guide hole; 72. Guide slider; 73. Hinge shaft. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] Example 1

[0030] like Figures 1 to 8As shown, the button attaching machine includes a housing 1, a lower shaft 11, and a button clamp 12. The lower shaft 11 is rotatably connected in the housing 1 and can drive the rotary hook to rotate. A button clamp seat 2 is provided on the housing 1 above the lower shaft 11. The front end of the button clamp 12 is the button attaching station 13, where the button is clamped. The button attaching station 13 is located directly below the sewing needle. The rear end of the button clamp 12 is hinged to the rear end of the button clamp seat 2, which allows the button clamp 12 to swing up and down to achieve the lifting and lowering action.

[0031] The driving mechanism for the snap fastener 12 to move includes a Y-axis drive motor 3, an X-axis drive motor 5, a swing arm 4, and a push-pull rod 6. The swing arm 4 is rotatably connected to the housing 1 via a rotating shaft 4b1, which is located directly below the lower shaft 11. The front end of the swing arm 4 is provided with a clearance connector 41, through which the lower shaft 11 passes. The upper end of the clearance connector 41 is movably connected to the front end of the snap fastener seat 2. The push-pull rod 6 is located directly above the lower shaft 11, passes through the housing 1, and can move back and forth along the axial direction. The rear end of the snap fastener seat 2 is rotatably connected to the front end of the push-pull rod 6.

[0032] The avoidance connector 41 includes an avoidance section 411, a vertical section 412, and a connecting section 413. The avoidance section 411 protrudes to one side relative to the rocker arm 4. The vertical section 412 is connected to the end of the avoidance section 411 and is vertically upward. The upper end of the avoidance section 411 is higher than the lower shaft 11. The connecting section 413 is connected to the upper end of the avoidance section 411 and is located directly above the lower shaft 11. A connecting shaft 42 is fixed to the upper end of the connecting section 413. A slider 43 is rotatably connected to the connecting shaft 42. A strip-shaped guide hole 21 is opened at the front end of the clamp seat 2 along the axial direction of the lower shaft 11. The slider 43 is slidably connected in the strip-shaped guide hole 21. A nut is provided at the upper end of the connecting shaft 42. The nut abuts against the upper end of the slider 43. The clearance section 411, the vertical section 412, and the connecting section 413 form a "C"-shaped notch. The notch of the clearance connector 41 faces to the right. The lower shaft 11 passes through the notch of the clearance connector 41. There is clearance space between the lower shaft 11 and the vertical section 412. When the swing arm 4 swings to the right, the clearance space prevents the lower shaft 11 and the vertical section 412 from contacting and colliding. When the swing arm 4 swings to the left, there is no obstruction between the lower shaft 11 and the clearance connector 41.

[0033] The Y-axis drive motor 3 is fixed on one side of the housing 1. The swing arm 4 includes a connecting section 4a and a swing section 4b. The swing section 4b is located below the lower shaft 11. The rotating shaft 4b1 is fixedly connected to the middle section of the swing section 4b. The Y-axis drive motor 3 is located on the side of the main shaft. The connecting section 4a is bent relative to the swing section 4b towards the Y-axis drive motor 3. The Y-axis drive motor 3 and the end of the connecting section 4a are connected by a two-bar assembly 31. The two-bar assembly 31 includes a short rod 32 and a long rod 33. The short rod 32 and the long rod 33 are rotatably connected. The end of the short rod 32 is fixedly connected to the motor shaft of the Y-axis drive motor 3. The end of the long rod 33 is rotatably connected to the end of the connecting section 4a of the swing arm 4.

[0034] The X-axis drive motor 5 is fixed on one side of the housing 1. In this embodiment, the Y-axis drive motor 3 and the X-axis drive motor 5 are located on the same side. A rack 61 is provided on the push-pull rod 6 along the axial direction. A drive tooth 51 is fixed on the motor shaft of the X-axis drive motor 5. The drive tooth 51 meshes with the rack 61 on the push-pull rod 6.

[0035] A mounting base plate 7 is fixedly installed inside the housing 1. An elongated guide hole 71 is formed on the mounting base plate 7 along the axial direction of the lower shaft 11. A guide slider 72 is slidably connected within the guide hole 71. A hinge shaft 73 is fixedly connected to the guide slider 72. A clamping seat 2 is mounted on the mounting base plate. The hinge shaft 73 is rotatably connected to the rear end of the clamping seat 2. The front end of the push-pull rod 6 is rotatably connected to the hinge shaft 73. The mounting base plate 7 guides the clamping seat 2 to move axially along the lower shaft 11 through the guide hole 71 and the guide slider 72, and guides the back-and-forth swing of the clamping seat 2 through the hinge shaft 73.

[0036] The swing arm 4 rotates around the pivot 4b1 to avoid the connector 41, which drives the clip seat 2 to swing. This allows the clip seat 2 to move the snap-on clip 12 in the Y-axis direction. The connector 41 is avoided so that the lower shaft 11 can pass through, thus avoiding assembly interference during the assembly of the lower shaft 11. This allows the swing arm 4 to be movably connected to the front end of the clip seat 2. The X-axis drive motor 5 drives the drive gear 51 to rotate back and forth. Through the gear transmission between the drive gear 51 and the rack 61 on the push-pull rod 6, the push-pull rod 6 moves back and forth, allowing the snap-on clip 12 to move in the X-axis direction. Through the above structure, the snap-on clip 12 can move freely on the horizontal plane when snapping buttons, which can also drive the button to move freely, aligning the button hole with the sewing needle, and thus snapping the button.

[0037] In this application, the Y-axis direction is the axial direction of the lower shaft 11, and the X-axis is the horizontal and perpendicular direction to the axial direction of the lower shaft 11.

[0038] Example 2

[0039] This embodiment is basically the same as embodiment one in structure and principle, except that: Figure 9 As shown, the clearance connector 41 is C-shaped, with the notch of the clearance connector 41 facing to the left, and the lower shaft 11 passing through the notch of the clearance connector 41. This structure enables the clearance connector 41 to avoid the lower shaft 11 and to connect with the clip seat 2.

[0040] Example 3

[0041] This embodiment is basically the same as embodiment one in structure and principle, except that: Figure 10As shown, the clearance connector 41 has a clearance hole 414, and the lower shaft 11 passes through the clearance hole 414. The diameter of the clearance hole 414 is larger than the diameter of the lower shaft 11, and this difference is sufficient to allow the swing rod 4 to avoid the lower shaft 11 when it swings. This structure enables the clearance connector 41 to avoid the lower shaft 11 and to connect with the clip seat 2.

[0042] Example 4

[0043] This embodiment is basically the same as the first embodiment in terms of structure and principle, except that the avoidance connector 41 is C-shaped, the notch of the avoidance connector 41 faces downward, and the lower shaft 11 passes through the notch of the avoidance connector 41. This structure enables the avoidance connector 41 to avoid the lower shaft 11 and to connect with the clip seat 2.

[0044] Example 5

[0045] This embodiment is basically the same as Embodiment 1 in structure and principle, except that: a Y-axis drive motor is fixed on one side of the housing; the swing arm includes a connecting section and a swing section; the swing section is located below the lower shaft; the rotating shaft is fixedly connected to the middle section of the swing section; the Y-axis drive motor is located on the side of the main shaft; the connecting section is bent relative to the swing section towards the Y-axis drive motor; drive teeth are fixed on the motor shaft of the Y-axis drive motor; and sector teeth are provided at the end of the connecting section, with the drive teeth and sector teeth meshing. The swing arm swings around the rotating shaft via gear transmission.

[0046] Example 6

[0047] This embodiment is basically the same as Embodiment 1 in structure and principle, except that: a rotating block is rotatably connected to the upper end of the avoidance connector, and a sliding groove is formed on the upper end of the rotating block along the axial direction of the lower shaft. A connecting block is fixed to the lower side of the clamp seat, and the connecting block is slidably connected in the sliding groove. The cooperation between the sliding groove and the connecting block allows the swing rod to drive the clamp seat to swing. During the swing, the rotating block will rotate and the connecting block will slide relative to the rotating block.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A driving mechanism for moving a button clamp in a button-attaching machine, the button-attaching machine comprising a housing (1), a lower shaft (11), and a button clamp (12), wherein a button clamp seat (2) is provided on the housing (1) above the lower shaft (11), and the rear end of the button clamp (12) is connected to the rear end of the button clamp seat (2), characterized in that, The drive mechanism includes a rocker arm (4), which is rotatably connected to the housing (1) via a rotating shaft (4b1). The front end of the rocker arm (4) is provided with a clearance connector (41), and the lower shaft (11) passes through the clearance connector (41). The upper end of the clearance connector (41) is movably connected to the front end of the buckle seat (2).

2. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 1, characterized in that, The clearance connector (41) is C-shaped, and the notch of the clearance connector (41) faces to the left, right or down. The lower shaft (11) passes through the notch of the clearance connector (41).

3. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 1, characterized in that, The clearance connector (41) has a clearance hole (414), and the lower shaft (11) passes through the clearance hole (414). The diameter of the clearance hole (414) is larger than the diameter of the lower shaft (11).

4. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 1, 2, or 3, characterized in that, The rotating shaft (4b1) is located directly below the lower shaft (11).

5. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 1, 2, or 3, characterized in that, The front end of the buckle seat (2) is provided with a strip-shaped guide hole (21) along the axial direction of the lower shaft (11). The upper end of the avoidance connector (41) is provided with a connecting shaft (42). A slider (43) is connected to the connecting shaft (42). The slider (43) is slidably connected in the strip-shaped guide hole (21).

6. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 1, 2, or 3, characterized in that, A Y-axis drive motor (3) is fixed on one side of the housing (1). The swing arm (4) includes a connecting section (4a) and a swing section (4b). The swing section (4b) is located below the lower shaft (11). The connecting section (4a) bends relative to the swing section (4b) toward the Y-axis drive motor (3). The ends of the Y-axis drive motor (3) and the connecting section (4a) are connected by a two-bar linkage (31).

7. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 1, 2, or 3, characterized in that, The drive mechanism also includes a push-pull rod (6), which is located directly above the lower shaft (11). The push-pull rod (6) passes through the housing (1) and can move back and forth along the axial direction. The rear end of the buckle seat (2) is rotatably connected to the front end of the push-pull rod (6).

8. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 7, characterized in that, An X-axis drive motor (5) is fixed on one side of the housing (1). A rack (61) is provided on the push-pull rod (6) along the axial direction. A drive tooth (51) is fixed on the motor shaft of the X-axis drive motor (5). The drive tooth (51) meshes with the rack (61) on the push-pull rod (6).

9. The driving mechanism for moving the button clamp in the button-attaching machine according to claim 7, characterized in that, The housing (1) is fixedly installed with a base plate (7). The base plate (7) has an elongated guide hole (71) along the axial direction of the lower shaft (11). A guide slider (72) is slidably connected in the guide hole (71). A hinge shaft (73) is fixedly connected to the guide slider (72). The buckle seat (2) is set on the mounting floor. The hinge shaft (73) is rotatably connected to the rear end of the buckle seat (2). The front end of the push-pull rod (6) is rotatably connected to the hinge shaft (73).

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