Independent presser foot drive mechanism and embroidery machine

Abstract

The application discloses an independent presser foot driving mechanism and an embroidery machine, which comprises a machine head, a driving mechanism of needle bars installed on the machine head, a needle bar driving block and a presser foot driving block which can be arranged on corresponding guide rods and can slide up and down, and as an improvement, the application further comprises a presser foot driving motor for independently driving the presser foot, a presser foot connecting rod assembly connected between the presser foot driving motor and the presser foot driving block to complete the presser foot driving. The independent presser foot driving motor and the presser foot connecting rod assembly are arranged, so that the presser foot action can be independently driven. The presser foot can independently complete more complex actions under the driving of the driving motor according to corresponding embroidery processes. Meanwhile, the independent presser foot driving can effectively reduce the load of the main shaft of the embroidery machine, so that the main shaft can be relatively lightly loaded and operated, the precision of the main shaft operation is improved, or more machine heads can be added.

Description

Technical Field

[0001] This invention relates to an independent presser foot drive mechanism and an embroidery machine using the mechanism. Background Technology

[0002] In existing embroidery machines, both the presser foot and needle bar are driven by corresponding cams on the main shaft. With the increasing number of machine heads, this can easily lead to insufficient power, vibration, or other problems on the main shaft. Furthermore, since the presser foot and needle bar operate simultaneously, the presser foot, constrained by the drive mechanism, cannot perform more complex processing actions.

[0003] When an embroidery machine is in operation, its main shaft runs continuously. This continuous spindle drives the corresponding needle bars on all the machine heads to run continuously via a needle bar driver. Even unused machine heads run, which increases the load on the main shaft and wastes resources.

[0004] To reduce load, a jump motor is installed on the machine head. This jump motor has a corresponding jump linkage assembly. When a portion of the machine head is not in operation, the jump motor and jump linkage assembly drive the needle bar driver, causing the needle bar driver to deflect and disengage from the needle bar. This leaves the needle bar drive block of that portion of the machine head unloaded, thus reducing the load on the spindle. This action is entirely performed by the jump motor. However, due to some uncontrollable factors, there is a small chance that the jump motor will fail to complete the corresponding action, resulting in the needle bar drive block on the corresponding machine head not disengaging or not completely disengaging from the needle bar, thus failing to achieve the design purpose. Summary of the Invention

[0005] To address the problems existing in the use of existing embroidery machines, this invention provides an independent presser foot drive mechanism that can relatively reduce the load on the embroidery machine, save energy, and has reliable performance, as well as an embroidery machine using this mechanism.

[0006] The technical solution of the present invention to solve the existing problems is an independent presser foot drive mechanism for an embroidery machine, including a machine head, a needle bar drive mechanism mounted on the machine head, a needle bar drive block and a presser foot drive block that can be set on a corresponding guide rod and can slide up and down. As an improvement, it also includes a presser foot drive motor that independently drives the presser foot, and a presser foot connecting rod assembly that connects the presser foot drive motor and the presser foot drive block to complete the presser foot drive.

[0007] As a further improvement, the presser foot is provided with a positioning presser foot sliding up and down and an independent presser foot guide rod located inside the machine head. The presser foot drive block is slidably disposed on the presser foot guide rod. The presser foot drive block is located at the first guide rod of the needle bar drive block and is provided with a positioning groove adapted to the first guide rod.

[0008] As a further improvement, the presser foot linkage assembly includes a first linkage fixed to the motor shaft of the presser foot drive motor, and a second linkage movably connected to the presser foot drive block, with the first and second linkages rotatably connected to each other.

[0009] As a further improvement, it also includes a deflection drive mechanism that drives the needle bar drive block to deflect and disengage from the needle bar. The deflection drive mechanism includes a trigger that cooperates with the corresponding part of the presser foot drive block when it rises into the middle parking position or continues to rise into the non-working position, a transmission linkage assembly that transmits the power of the trigger, and a swing arm that cooperates with the transmission linkage assembly to receive the power to drive the needle bar drive block to deflect. The presser foot drive block is provided with a drive part that touches the trigger.

[0010] As a further improvement, the trigger includes a trigger rod and a torsion arm connected to the trigger rod, the trigger rod having a bent arm portion that cooperates with the drive unit; the transmission linkage assembly includes a transmission arm rotatably disposed in the middle, one end of the transmission arm cooperating with the torsion arm and the other end cooperating with the swing arm.

[0011] As a further improvement, a matching sliding insert and sliding shaft are provided between the torsion arm and the transmission arm.

[0012] As a further improvement, the swing arm is provided with a bearing that cooperates with the needle bar drive block to drive the needle bar drive block to deflect; the swing arm is provided with a resetting elastic body.

[0013] As a further improvement, it also includes a jump motor mounted on the head of the embroidery machine, which drives the swing arm to rotate to drive the needle bar drive block to deflect away from the needle bar. The jump motor is mounted on the bare side of the head housing, and the presser foot drive motor is located on the other side of the head housing.

[0014] As a further improvement, the deflection drive mechanism also includes a retainer fixed to the head of the machine, and the transmission link assembly and trigger are mounted on the retainer.

[0015] An embroidery machine, wherein at least one machine head is installed on the embroidery machine, and at least one machine head is equipped with an independent presser foot drive mechanism according to any of the above schemes.

[0016] Compared with existing technologies, this invention achieves independent presser foot movement by setting up an independent presser foot drive motor and presser foot linkage assembly. Its advantages include allowing the presser foot to independently complete more complex movements under the drive of the motor, depending on the specific embroidery process. Simultaneously, independent presser foot drive effectively reduces the load on the embroidery machine's main shaft, enabling it to operate under relatively light loads, improving the accuracy of main shaft operation, or allowing for the addition of more machine heads.

[0017] Further, a deflection drive mechanism is designed so that when some machine heads are not used temporarily, an independent presser foot drive motor drives the presser foot drive block to return the presser foot to the non-working position. The drive part of the presser foot drive block cooperates with the trigger of the deflection drive mechanism, and then drives the swing arm through the transmission linkage assembly. Finally, the swing arm cooperates with the needle bar drive block, and the swing arm drives the needle bar drive block to deflect and disengage from the needle bar, so that the continuously loaded needle bar drive block is unloaded. This can greatly reduce the load on the embroidery machine spindle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the deflection drive mechanism during the embroidery process of the present invention.

[0020] Figure 3 This is a schematic diagram showing the state of the presser foot during the embroidery process of the present invention.

[0021] Figure 4 This is a schematic diagram of the deflection drive mechanism of the present invention when the embroidery is not in operation.

[0022] Figure 5 This is a schematic diagram of the presser foot's state when the embroidery is not in operation.

[0023] Figure 6 This is an exploded view of the deflection drive mechanism of the present invention.

[0024] Figure 7 This is a top view of the needle bar drive block disengaging from the needle bar state when the present invention is not in operation.

[0025] Figure 8 yes Figure 1 An enlarged schematic diagram of point a. Detailed Implementation

[0026] See Figure 1-8This embodiment includes a machine head 1, a drive mechanism for the needle bar mounted on the machine head 1, a needle bar drive block 7 and a presser foot drive block 4 that can be set on corresponding guide rods and can slide up and down, and also includes a presser foot drive motor 2 that independently drives the presser foot, and a presser foot linkage assembly that connects the presser foot drive motor 2 and the presser foot drive block 4 to complete the presser foot drive. The presser foot drive motor 2 can be fixed independently or fixed on the machine head. The needle bar, presser foot rod, presser foot, and needle bar frame are not shown in the attached drawings. The needle bar, presser foot rod, presser foot, and needle bar frame can adopt existing known technologies. One or more needle bars and needle bar frames adapted to one or more needle bars can be set on the machine head 1. Each needle bar has a matching presser foot and a presser foot rod connected to the presser foot. The needle bar holder is slidably driven by a known existing driving device, causing the corresponding needle bar on the needle bar holder to engage with the needle bar driving block 7. Simultaneously, the corresponding part of the driving rod of the presser foot located behind the corresponding needle bar engages with the corresponding part of the presser foot driving block 4, thereby driving the corresponding needle bar and presser foot to work. The needle bar driving block 7 has a locking slot for engaging the corresponding needle bar at the corresponding point, and the presser foot driving block 4 has a locking slot for engaging the corresponding presser foot at the corresponding point.

[0027] In this embodiment, the presser foot is equipped with a positioning presser foot that slides up and down, and an independent presser foot guide rod 31 located inside the machine head 1. The presser foot drive block 4 is slidably mounted on the presser foot guide rod 31. The presser foot drive block 4 is located at the first guide rod 41 of the needle bar drive block 7 and is provided with a positioning groove 42 that is adapted to the first guide rod 41. The positioning groove 42 and the presser foot guide rod 31 constitute the positioning of the presser foot, so that the presser foot drive block 4 can slide up and down without deflection according to a preset state for normal operation.

[0028] The presser foot linkage assembly includes a first linkage 21 fixed to the motor shaft 23 of the presser foot drive motor 2 and a second linkage 22 movably connected to the presser foot drive block 4. The first and second linkages 21 and 22 are rotatably connected to each other. The presser foot linkage assembly is located on the side of the presser foot drive block 4, close to the presser foot drive motor 2. The independent drive motor 2 and the presser foot linkage assembly cooperate to complete the raising and lowering of the presser foot and the corresponding actions required for operation. Generally, the presser foot drive block 4 drives the presser foot to three positions: the lowest position for entering the working state, the middle pause position, and the highest position for entering the non-working state.

[0029] It also includes a deflection drive mechanism that drives the needle bar drive block 7 to deflect and disengage from the needle bar. The deflection drive mechanism includes a trigger that cooperates with the presser foot drive block 4 when it rises into the middle parking position or continues to rise into the non-working position, a transmission link assembly that transmits the power of the trigger, and a swing arm 6 that cooperates with the transmission link assembly to receive the power to drive the needle bar drive block 7 to deflect. The presser foot drive block 4 is provided with a drive part 3 that touches the trigger.

[0030] The trigger includes a trigger rod 52 and a torsion arm 55 connected to the trigger rod 52. The trigger rod 52 has a bent arm portion that cooperates with the drive unit 3. The transmission linkage assembly includes a transmission arm 56 rotatably disposed in the middle. One end of the transmission arm 56 cooperates with the torsion arm 55, and the other end cooperates with the swing arm 6. The drive unit 3 may be an extension handle disposed on the pressure foot drive block 4. The extension handle 4 has an inclined surface at the point where it cooperates with the bent arm portion of the trigger to facilitate smooth cooperation between the extension handle and the bent arm portion. A sliding insert and a sliding shaft are provided between the torsion arm 55 and the transmission arm 56.

[0031] The swing arm 6 is provided with a bearing 62 that cooperates with the needle bar drive block 7 to drive the needle bar drive block 7 to deflect; the swing arm 6 is provided with a resetting elastic body 61.

[0032] It also includes a jump motor 51, which rotates the drive arm 6 mounted on the embroidery machine head 1 to drive the needle bar drive block 7 to deflect and disengage from the needle bar. The jump motor 51 is mounted on the exposed side of the machine head 1 housing, while the presser foot drive motor 2 is located on the other side of the machine head 1 housing. The deflection drive mechanism and the jump motor 51 provide double protection for the needle bar drive block 7 disengaging from the needle bar in the machine head during shutdown. The deflection drive mechanism, being a mechanical structure, makes the disengagement of the needle bar drive block 7 from the needle bar in the machine head more reliable.

[0033] The deflection drive mechanism also includes a retainer 54 fixed to the head 1, and the transmission link assembly and trigger are mounted on the retainer 54. A connecting plate 53 can be provided on the retainer 54 to connect to the corresponding part of the head housing, the jump motor 51 can be connected to the connecting plate 53, and the middle part of the transmission arm 56 can be set on the connecting plate 53 via a rotating shaft.

[0034] When the upper part of the embroidery machine head is not in use, the presser foot drive motor 2 drives the presser foot drive block 4 to rise through the presser foot linkage assembly. When it rises to the middle parking position or continues to rise to the non-working position, the extension handle of the drive part 3 of the presser foot drive block 4 contacts the curved arm, causing the trigger rod 52 to rotate. Then, through the sliding insertion and sliding shaft of the torsion arm 55 and the transmission arm 56, the transmission arm 56 is driven to rotate. The other end of the transmission arm 56 drives the swing arm 6 to rotate. The bearing on the swing arm 6 contacts the needle bar drive block 7, causing the needle bar drive block 7 to be biased and disengaged from the driven needle bar, so that the needle bar drive block 7 of the unused machine head is unloaded. Of course, the swing arm 6 can also be driven to rotate independently or synchronously by the jump motor 51, and finally the bearing on the swing arm 6 contacts the needle bar drive block 7, causing the needle bar drive block 7 to be biased and disengaged from the driven needle bar.

[0035] When the presser foot needs to be paused, the presser foot drive motor 2 drives the presser foot drive block 4 to descend via the presser foot linkage assembly. The extension handle of the drive part 3 of the descending presser foot drive block 4 strikes or disengages from the trigger rod 52, and then drives the transmission arm 56 to rotate in the opposite direction through the sliding insertion and sliding shaft of the torsion arm 55 and the engagement end of the transmission arm 56. The other end of the transmission arm 56 drives the swing arm 6 to rotate in the opposite direction. The swing arm 6 returns to its original position under the action of the reset elastic body 61 and / or the elastic body on the needle bar drive block 7. The needle bar drive block 7 returns to its engagement position with the needle bar and drives the needle bar to move. Alternatively, the swing arm 6 can be driven to rotate in the opposite direction independently or synchronously by the jump motor 51, ultimately causing the needle bar drive block 7 to return to its engagement position with the needle bar and drive the needle bar to move.

[0036] The present invention also discloses an embroidery machine, wherein at least one machine head 1 is installed on the embroidery machine, and at least one machine head 1 is equipped with an independent presser foot drive mechanism of any of the above schemes.

Claims

1. A separate presser foot driving mechanism comprising a head, a needle bar driving mechanism mounted on the head, a needle bar driving block and a presser foot driving block arranged on respective guide rods and capable of sliding up and down, characterized in that The foot driving motor, the foot connecting rod assembly, the deflection driving mechanism, the foot guide rod, the first guide rod, the first connecting rod, the second connecting rod, the bearing, the jump motor and the retaining frame are all installed on the embroidery machine head. The foot driving motor, the foot connecting rod assembly, the deflection driving mechanism, the foot guide rod, the first guide rod, the first connecting rod, the second connecting rod, the bearing, the jump motor and the retaining frame are all installed on the embroidery machine head. At least one machine head is provided with the independent foot driving mechanism. ​ ​ ​ 2. A machine for embroidering, said machine being provided with at least one head, characterized in that ​

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