A presser foot driving mechanism of an embroidery machine and an embroidery machine

Abstract

The application provides a presser foot driving mechanism of an embroidery machine and the embroidery machine, and belongs to the technical field of machinery.The presser foot driving mechanism of the embroidery machine comprises a presser foot cam assembly and a presser foot driver, the presser foot cam assembly comprises a presser foot cam, a first three-eye connecting rod, a first connecting rod, a second three-eye connecting rod and a second connecting rod which are sequentially connected in transmission, the second connecting rod is rotationally connected with the presser foot driver, and the presser foot driving mechanism further comprises a presser foot lifting assembly, the presser foot lifting assembly comprises a presser foot lifting driving gear and a presser foot lifting driven gear which are connected in transmission, the presser foot lifting driven gear is provided with an eccentric shaft at an eccentric position, and the middle eye of the second three-eye connecting rod is connected on the eccentric shaft.The eccentric shaft is driven to rotate by a stepping motor, so that the position of the presser foot can be switched between a working state and a shutdown state, that is, in the working state, the vibration and noise can be effectively reduced, and the impact force borne by each part is reduced;in the shutdown state, the presser foot is lifted, the interference is reduced, and the maintenance is facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machinery, and relates to an embroidery machine, in particular to an embroidery machine presser foot driving mechanism and an embroidery machine. BACKGROUND

[0002] The current traditional embroidery machine presser foot driving device includes a presser foot driving cam assembly and a presser foot driving transmission assembly driven by the presser foot driving cam assembly, wherein the main component of the presser foot driving cam assembly is a presser foot cam, and in addition, a flange bearing and a cover plate are connected with the presser foot cam, plus a presser foot driving connecting rod, which is also commonly referred to as a presser foot driving four-piece set. The presser foot driving transmission assembly includes a presser foot driving three-eye connecting rod and a presser foot driving small connecting rod, and the presser foot driver is driven by the presser foot driving small connecting rod to slide up and down along the guide shaft, and the presser foot driver drives the presser foot, thereby realizing presser foot driving. For high-speed embroidery machines, neither the service life nor the strength of the existing structural parts can meet the needs of high speed. The applicant applied for an invention patent on July 13, 2021, and the patent was granted and announced as CN215404962U, which discloses an embroidery machine presser foot driving device and an embroidery machine. The embroidery machine presser foot driving device includes a main shaft rotatably connected to a machine head shell and a presser foot driver driven by the main shaft. The main shaft is connected with a presser foot cam assembly, and the presser foot cam assembly includes a presser foot cam, a first three-eye connecting rod, a second three-eye connecting rod, a first small connecting rod, and a second small connecting rod. The presser foot cam assembly is connected with the first three-eye connecting rod, and the first three-eye connecting rod, the first small connecting rod, the second three-eye connecting rod, and the second small connecting rod are sequentially transmissionally connected. The second small connecting rod is rotatably connected with the presser foot driver. Although this device can meet the high-speed operation of the embroidery machine to a certain extent, the stroke of the entire presser foot driver is relatively large when it is working, often reaching a lifting stroke of 16.5 cm. The vibration and noise are relatively large when it is working, and the service life of the workpiece is also relatively short due to the large stroke and the relatively large stress. SUMMARY

[0003] The purpose of the present application is to solve the above-mentioned problems existing in the prior art, and to provide an embroidery machine presser foot driving mechanism and an embroidery machine, which can reduce noise in high-speed embroidery work.

[0004] The purpose of the present application can be achieved by the following technical scheme: an embroidery machine presser foot driving mechanism, including a presser foot cam assembly and a presser foot driver, the presser foot cam assembly including a presser foot cam, a first three-eye connecting rod, a first connecting rod, a second three-eye connecting rod, and a second connecting rod, which are sequentially transmissionally connected, and the second connecting rod is rotatably connected with the presser foot driver, characterized in that it further includes a presser foot lifting assembly, the presser foot lifting assembly including a presser foot lifting driving gear and a presser foot lifting driven gear which are meshingly transmissionally connected, the eccentric shaft is provided at an eccentric position of the presser foot lifting driven gear, and the middle eye of the second three-eye connecting rod is connected with the eccentric shaft.

[0005] In the embroidery machine presser foot driving mechanism, the presser foot lifting driving step motor, the presser foot lifting driving gear and the presser foot lifting driven gear are all supported on the head shell, and the gear shaft of the presser foot lifting driven gear is connected with the motor shaft of the presser foot lifting driving step motor through a shaft coupling.

[0006] In the embroidery machine presser foot driving mechanism, the transmission ratio of the presser foot lifting driving gear and the presser foot lifting driven gear is greater than 1.

[0007] In the embroidery machine presser foot driving mechanism, the presser foot lifting driving gear is a double-shaft extension gear, the motor shaft of the presser foot lifting driving step motor is connected with the right end gear shaft of the presser foot lifting driving gear, and the presser foot lifting driving step motor is connected on the right side wall of the head shell, and the left end gear shaft of the presser foot lifting driving gear is inserted through the left side wall of the head shell, and the left end gear shaft is connected with a presser foot lifting handle.

[0008] In the embroidery machine presser foot driving mechanism, the presser foot lifting driven gear is supported on the presser foot lifting gear seat through a bearing, and the presser foot lifting gear seat is fixedly connected on the head shell.

[0009] In the embroidery machine presser foot driving mechanism, the presser foot driver has a bayonet for connecting the presser foot, and the presser foot shaft of the presser foot is fixedly connected with a positioning block matched with the bayonet.

[0010] In the embroidery machine presser foot driving mechanism, the tail end eye of the first three-eye connecting rod is rotationally connected with the head shell, the middle eye of the first three-eye connecting rod is connected with the eye of the presser foot cam and the tail end eye of the first connecting rod through a first pin shaft, the head end eye of the first connecting rod is connected with the tail end eye of the second three-eye connecting rod through a second pin shaft, the head end eye of the second three-eye connecting rod is connected with the tail end eye of the second connecting rod through a third pin shaft, and the head end eye of the second connecting rod is connected with the presser foot driver through a fourth pin shaft.

[0011] The purpose of the present application can be achieved by the following technical scheme: an embroidery machine comprising the embroidery machine presser foot driving mechanism according to any one of the above.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] 1. The position of the presser foot can be switched between the working state and the shutdown state by rotating the eccentric shaft driven by the presser foot lifting driving step motor, that is, in the working state, the presser foot is at a lower position for reciprocating lifting operation, which can effectively reduce vibration and noise and reduce the impact force on each part, thereby prolonging the service life; in the shutdown state, the presser foot is raised to reduce interference and facilitate maintenance;

[0014] 2、By setting the positioning block on the presser shaft, and the positioning block is clamped in the bayonet of the presser driver, so that the presser shaft and the presser are directly driven by the presser driver to lift, reducing the impact of components, making less noise, and the service life of the components is longer. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the structural diagram of the present application.

[0016] Fig. 2 is the exploded view of the present application.

[0017] Fig. 3 is the exploded view of another angle of the present application

[0018] In the figure, 1, presser cam; 2, first three-eye connecting rod; 3, first connecting rod; 4, second three-eye connecting rod; 5, second connecting rod; 6, presser driver; 601, bayonet; 7, presser lifting drive gear; 8, presser lifting driven gear; 9, eccentric shaft; 10, presser lifting drive stepper motor; 11, head shell; 12, presser lifting handle; 13, presser lifting gear seat; 14, presser; 15, presser shaft; 16, positioning block; 17, first pin shaft; 18, second pin shaft; 19, third pin shaft; 20, fourth pin shaft; 21, shaft coupling. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0020] Example one:

[0021] Referring to Figs. 1-3The embodiment is a presser foot driving mechanism of an embroidery machine, which comprises a presser foot cam assembly, a presser foot lifting assembly, a presser foot driver 6, the presser foot cam assembly comprises a presser foot cam 1, a first three-eye connecting rod 2, a first connecting rod 3, a second three-eye connecting rod 4 and a second connecting rod 5 which are sequentially connected in transmission, the tail end eye of the first three-eye connecting rod 2 is rotationally connected with a head casing 11, the middle eye of the first three-eye connecting rod 2 is connected with the eye of the presser foot cam 1 and the tail end eye of the first connecting rod 3 through a first pin shaft 17, the head end eye of the first connecting rod 3 is connected with the tail end eye of the second three-eye connecting rod 4 through a second pin shaft 18, the head end eye of the second three-eye connecting rod 4 is connected with the tail end eye of the second connecting rod 5 through a third pin shaft 19, and the head end eye of the second connecting rod 5 is connected with the presser foot driver 6 through a fourth pin shaft 20; the presser foot lifting assembly comprises a presser foot lifting driving stepper motor 10, a presser foot lifting driving gear 7 and a presser foot lifting driven gear 8, and the presser foot lifting driving stepper motor 10, the presser foot lifting driving gear 7 and the presser foot lifting driven gear 8 are all supported on the head casing 11. Specifically, the presser foot lifting driving gear 7 is a double-shaft extension gear, the right end gear shaft of the presser foot lifting driving gear 7 penetrates through the right side wall of the head casing 11 and is connected with the motor shaft of the presser foot lifting driving stepper motor 10 through a shaft coupling 21, the presser foot lifting driving stepper motor 10 is fixedly connected to the right side wall of the head casing 11, the left end gear shaft of the presser foot lifting driving gear 7 penetrates through the left side wall of the head casing 11 and is connected with a presser foot lifting handle 12. The presser foot lifting driven gear 8 is supported on a presser foot lifting gear seat 13 through a bearing, and the presser foot lifting gear seat 13 is fixedly connected to the head casing 11; the presser foot lifting driven gear 8 and the presser foot lifting driving gear 7 are in meshing transmission connection, the eccentric shaft 9 is arranged at the eccentric position of the presser foot lifting driven gear 8, and the middle eye of the second three-eye connecting rod 4 is connected to the eccentric shaft 9.

[0022] Preferably, the transmission ratio of the presser foot lifting driving gear 7 and the presser foot lifting driven gear 8 is greater than 1. The size of the presser foot lifting driven gear 8 is greater than that of the presser foot lifting driving gear 7, and the entire gear assembly structure is relatively small and has a relatively large adjustable range.

[0023] Preferably, the presser foot driver 6 has a bayonet 601 for connecting the presser foot 14, the presser foot shaft 15 of the presser foot 14 is fixedly connected with a positioning block 16 which is matched with the bayonet 601, the connection is more firm, and the high-speed lifting in the short-stroke working state of the presser foot 14 can be better satisfied.

[0024] The working principle of the first embodiment is as follows: the first embodiment drives the presser foot lifting driving gear 7 and the presser foot lifting driven gear 8 by the presser foot lifting driving step motor 10, so that the position of the presser foot 14 can be switched between the working state and the shutdown state. When the presser foot 14 is in the working state, the presser foot lifting driven gear 8 is driven by the presser foot lifting driving step motor 10, so that the eccentric shaft 9 rotates to the eccentric position below the gear shaft of the presser foot lifting driven gear 8, and drives the second three-eye connecting rod 4, the second connecting rod 5, and the presser foot driver 6 to move downward, so that the presser foot 14 is closer to the needle plate. When the presser foot 14 is working, it reciprocates and lifts at a position 4-5 mm away from the needle plate. When the presser foot 14 is in the shutdown state, the presser foot lifting driven gear 8 is driven by the presser foot lifting driving step motor 10 and the eccentric shaft 9 rotates to the eccentric position on the gear shaft of the presser foot lifting driven gear 8, and drives the second three-eye connecting rod 4, the second connecting rod 5, and the presser foot driver 6 to move upward, so that the distance between the presser foot 14 and the needle plate is expanded to 26.5 mm, reducing interference and facilitating maintenance.

[0025] Embodiment two:

[0026] An embroidery machine comprising the presser foot driving mechanism of the first embodiment.

[0027] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. An embroidery machine presser foot drive mechanism comprising a presser foot cam assembly and a presser foot driver (6), the presser foot cam assembly comprising a presser foot cam (1), a first three-eye link (2), a first link (3), a second three-eye link (4), a second link (5) connected in turn in transmission, the second link (5) being connected in rotation with the presser foot driver (6), characterized in that, The presser foot lifting assembly comprises a presser foot lifting driving gear (7) and a presser foot lifting driven gear (8) engaged in transmission connection, the presser foot lifting driven gear (8) has an eccentric shaft (9) at an eccentric position, the middle eye of the second three-eye link (4) is connected to the eccentric shaft (9), the presser foot driver (6) has a bayonet (601) for connecting the presser foot (14), the presser foot shaft (15) of the presser foot (14) is fixedly connected with a positioning block (16) matched with the bayonet (601), and the presser foot lifting driving step motor (10) drives the presser foot lifting driving gear (7) and the presser foot lifting driven gear (8) to rotate and switch the position of the presser foot (14) between the working state and the shutdown state.

2. The embroidery machine presser foot drive mechanism according to claim 1, characterized in that, The presser foot lifting driving step motor (10), the presser foot lifting driving gear (7) and the presser foot lifting driven gear (8) are all supported on the head shell (11), and the gear shaft of the presser foot lifting driven gear (8) is connected with the motor shaft of the presser foot lifting driving step motor (10) through the shaft coupling (21).

3. A presser foot drive mechanism for an embroidery machine according to claim 2, characterised in that, The transmission ratio of the presser foot lifting driving gear (7) and the presser foot lifting driven gear (8) is greater than 1.

4. Embroidery machine presser foot drive mechanism according to claim 1 or 2 or 3, characterized in that The presser foot lifting driving gear (7) is a double-shaft extension gear, the motor shaft of the presser foot lifting driving step motor (10) is connected with the right end gear shaft of the presser foot lifting driving gear (7), the presser foot lifting driving step motor (10) is connected to the right side wall of the head shell (11), the left end gear shaft of the presser foot lifting driving gear (7) penetrates through the left side wall of the head shell (11), and the left end gear shaft is connected with the presser foot lifting handle (12).

5. Embroidery machine presser foot drive mechanism according to claim 1 or 2 or 3, characterized in that, The presser foot lifting driven gear (8) is supported on the presser foot lifting gear seat (13) through a bearing, and the presser foot lifting gear seat (13) is fixedly connected to the head shell (11).

6. The embroidery machine presser foot drive mechanism according to claim 1 or 2 or 3, characterized in that, The tail end eye of the first three-eye connecting rod (2) is rotatably connected with the head shell (11), the middle eye of the first three-eye connecting rod (2) is connected with the eye of the presser foot cam (1) and the tail end eye of the first connecting rod (3) through a first pin shaft (17), the head end eye of the first connecting rod (3) is connected with the tail end eye of the second three-eye connecting rod (4) through a second pin shaft (18), the head end eye of the second three-eye connecting rod (4) is connected with the tail end eye of the second connecting rod (5) through a third pin shaft (19), and the head end eye of the second connecting rod (5) is connected with the presser foot driver (6) through a fourth pin shaft (20).

7. Embroidery machine, characterized in that The embroidery machine presser foot driving mechanism comprises the first three-eye connecting rod (2), the first connecting rod (3), the second three-eye connecting rod (4), the second connecting rod (5) and the presser foot driver (6).

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