An independent embroidery machine head and embroidery machine

Abstract

An independent embroidery machine head and embroidery machine, comprising a frame, a needle bar driving device driven by a main shaft, the frame is provided with a presser foot and needle nozzle linkage driving device; the presser foot and needle nozzle linkage driving device comprises an independent motor, the independent motor is connected with a presser foot driving device and a needle nozzle driving device through a transverse shaft, the presser foot driving device and the needle nozzle driving device are respectively located on both sides of the needle bar; the needle bar driving device is connected with a presser foot brake device. The independent needle bar driving device, the presser foot and needle nozzle linkage driving device and the presser foot brake device are used to reduce the components driven by the needle bar driving device, increase the piercing capacity, complete the embroidery holding and needle bar guiding through the separated needle nozzle transmission device and the presser foot driving device, and finally realize the holding force maintaining for embroidery products with different thicknesses.

Description

Technical Field

[0001] The invention belongs to the technical field of embroidery machine equipment, and in particular relates to an independent embroidery machine head and an embroidery machine. Background Art

[0002] Currently, when embroidery machines are used on thicker fabrics, the embroidery needle is equipped with a presser foot device and a needle nozzle. The presser foot presses the fabric, and the needle nozzle guides the embroidery needle to complete the embroidery work. In this type of embroidery process structure, the presser foot device, needle bar device, and needle nozzle device are all driven by the main shaft. The driving force required by the needle bar is large, and it needs to drive a large number of mechanical transmission structures, resulting in low embroidery efficiency, weak puncture ability, and easy needle breakage. There are also independent presser foot drive devices on the market, but this independent presser foot drive device lacks a linkage device with the needle bar or needle nozzle, and the pressure is single for fabrics of different thicknesses. It cannot adapt to the pressure changes of fabrics of different thicknesses, the synchronous guidance of the needle nozzle, and the high-speed puncture performance of the needle bar.

[0003] Chinese utility model patent No. ZL 201621113147.2 discloses an embroidery machine head, comprising a needle bar assembly, a presser foot assembly, and a drive mechanism, wherein the drive mechanism comprises a vertical guide shaft and a first slider slidably disposed on the guide shaft, and is characterized in that the presser foot assembly can be connected to the first slider and raised and lowered synchronously. By independently connecting the presser foot assembly and the slider of the drive mechanism, the drive is avoided by the needle bar and spring, thereby greatly reducing the force on the main power transmission shaft, greatly reducing noise, improving efficiency, and reducing production costs. The above technology does not consider the technical problem of different presser foot pressures required for fabrics of different thicknesses, nor does it provide relevant solutions. In addition, the ultimate driving force of the presser foot and the needle bar comes from the main shaft, which still limits the needle bar's puncture and embroidery speed. Summary of the Invention

[0004] The invention provides an independent embroidery machine head and an embroidery machine which are suitable for fabrics of different thicknesses and can increase the needle bar puncture embroidery speed.

[0005] An independent embroidery machine head includes a frame and a needle bar drive device driven by a main shaft. The frame is equipped with a presser foot and needle nozzle linkage drive device; the presser foot and needle nozzle linkage drive device includes an independent motor, and the independent motor is connected to a synchronously moving presser foot drive device and a needle nozzle drive device through a transverse shaft. The presser foot drive device and the needle nozzle drive device are respectively located on both sides of the needle bar; the needle bar drive device is connected to a presser foot brake device.

[0006] The presser foot driving device includes a presser foot, the presser foot is connected to the presser foot driving rod, the presser foot driving rod is sleeved with a presser foot lever and a presser foot return spring, the presser foot lever cooperates with the presser foot driving block, the presser foot driving block is connected to the transverse shaft through the presser foot connecting rod, the presser foot driving block is sleeved with the first guide rod, the first guide rod cooperates with the transverse mounting plate of the frame; the presser foot driving rod cooperates with the bottom plate of the frame; the first guide rod and the presser foot driving rod are parallel to each other and are connected by a first connecting block.

[0007] An electromagnet for controlling the rotation direction of the presser foot driving block is provided on the side of the presser foot driving block.

[0008] The independent motor is connected to the transverse shaft via a belt set, which includes a driving wheel connected to the independent motor, a driven wheel connected to the transverse shaft, and a belt connecting the driving wheel and the driven wheel.

[0009] The needle nozzle driving device includes a needle nozzle, the needle nozzle is connected to a needle nozzle driving rod, the needle nozzle driving rod is sleeved with a slider of a matching guide groove, the slider is connected to a rocker rod, and the rocker rod is connected to a transverse axis.

[0010] The needle bar driving device includes a cam connected to the main shaft, the cam groove in the cam is connected to the three-eye connecting rod through a roller, the three-eye connecting rod is connected to the needle bar driving shaft through the third connecting rod, the needle bar driving shaft is connected to the needle bar driving block through the needle bar fork, and the needle bar driving block is sleeved with the needle bar.

[0011] The presser foot brake device includes a shaft sleeve with a first guide groove connected to the top of the needle rod, a sliding limit rod is installed in the first guide groove, the sliding limit rod cooperates with the presser foot limit block, the presser foot limit block is connected to the presser foot brake shaft, and the presser foot brake shaft cooperates with the first connecting block; the outer periphery of the presser foot brake shaft is sleeved with a brake reset spring.

[0012] The presser foot driving block is provided with an axis hole, the outer periphery of the presser foot driving block is provided with a slot for matching the presser foot lever, and the bottom of the presser foot driving block is provided with a torsion spring.

[0013] An embroidery machine comprises the above-mentioned independent embroidery machine head.

[0014] The independent embroidery machine head and the embroidery machine of the present invention reduce the parts that need to be driven by the needle bar driving device and increase the puncture capacity through the mutually independent needle bar driving device and the presser foot and needle nozzle linkage driving device. At the same time, the presser foot and needle nozzle linkage driving device complete the embroidery pressing and needle bar guiding through the separate needle nozzle transmission device and the presser foot driving device. Finally, the presser foot brake device connected to the needle bar driving device realizes the maintenance of the pressing force for embroidery products of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1This is a schematic diagram of the three-dimensional structure of the independent embroidery machine head of the present invention;

[0017] Figure 2 This is a schematic diagram of the side three-dimensional structure of the independent embroidery machine head of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the independent embroidery machine head of the present invention;

[0019] Figure 4 Schematic diagram of the three-dimensional structure of the needle bar driving device in the present invention;

[0020] Figure 5 Schematic diagram of the three-dimensional structure of the presser foot and needle nozzle linkage driving device in the present invention;

[0021] Figure 6 Schematic diagram of the three-dimensional structure of the presser foot driving block in the present invention;

[0022] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the independent embroidery machine head from a side view according to the present invention. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-7 The specific implementation method further describes the technical solution of this patent in detail.

[0024] An independent embroidery machine head and embroidery machine include a frame 12 and a spindle-driven needle bar drive device. The frame 12 is equipped with a presser foot and needle nozzle linkage drive device. The presser foot and needle nozzle linkage drive device includes an independent motor 27, which is connected to a synchronously moving presser foot drive device and a needle nozzle drive device via a transverse shaft 34. The presser foot drive device and the needle nozzle drive device are located on either side of the needle bar 1, creating a linkage effect between the presser foot and the needle nozzle. This reduces the number of spindle-driven components, allowing the spindle to drive only the needle bar drive device, reducing the load and thereby increasing the spindle speed. In other words, it increases the embroidery speed of the embroidery needle on the needle bar, achieving the technical goal of high-speed embroidery. The transverse shaft 34 is connected to the synchronously moving presser foot drive device and needle nozzle drive device. The synchronous movement of the presser foot drive device and needle nozzle drive device further improves the embroidery performance of the embroidery needle driven by the needle bar and prevents needle breakage. The presser foot drive device and needle nozzle drive device are located on either side of the needle bar 1, creating parallel motion in two directions, improving the operational stability of the presser foot drive device and needle nozzle drive device.

[0025] The preferred structure of the presser foot drive device includes a presser foot 2 connected to a presser foot drive rod 3, which is sleeved with a presser foot lever 4 and a presser foot return spring 41. The presser foot lever 4 cooperates with a presser foot drive block 5, which is connected to a transverse shaft 34 via a presser foot connecting rod 40. The presser foot drive block 5 sleeves onto a first guide rod 33, which cooperates with a transverse mounting plate 19 of the frame 12. The presser foot drive rod 3 cooperates with a base plate 42 of the frame 12. The first guide rod 33 and the presser foot drive rod 3 are parallel to each other and connected by a first connecting block 45. The presser foot lever 4 cooperates with the presser foot drive block 5 to achieve clutch performance relative to the independent motor 27. The presser foot lever 4 is inserted into the presser foot drive block 5. Driven by the presser foot connecting rod 40, the presser foot drive block 5 drives the presser foot 2 up and down to complete the pressing function of thicker fabrics. For thinner fabrics or fabrics with low pressing requirements, the presser foot lever 4 is not connected to the presser foot driving block 5 to achieve the technical effect that the presser foot 2 does not press the fabric.

[0026] The needle nozzle drive device includes a needle nozzle 26, which is connected to a needle nozzle drive rod 25. The needle nozzle drive rod 25 is sleeved with a slider 36 that fits in the guide groove 22. The slider 36 is connected to the rocker 20, and the rocker 20 is connected to the transverse shaft 34, so that the transverse shaft 34 can synchronously drive the needle nozzle drive device and the presser foot drive device. As a preferred structure, the slider 36 is connected to the rocker 20 via a fourth connecting rod 35.

[0027] To facilitate the clutching of the presser foot lever 4 and the presser foot drive block 5, an electromagnet 6 is installed on the side of the presser foot drive block 5 to control the rotation direction of the presser foot drive block 5. The clutching of the presser foot lever 4 and the presser foot drive block 5 is achieved by rotating the presser foot drive block 5. Specifically, the presser foot drive block 5 has an axial hole 38 within it, a slot 39 on its periphery that fits the presser foot lever 4, and a torsion spring 50 at its base. Inserting the presser foot lever 4 into the slot 39 activates the presser foot; otherwise, the presser foot does not move.

[0028] As a preferred structure, the independent motor 27 is connected to the transverse shaft 34 via a belt set, which includes a driving pulley 8 connected to the independent motor 27, a driven pulley 7 connected to the transverse shaft 34, and a belt 9 connecting the driving pulley 8 and the driven pulley 7.

[0029] As a preferred structure, the needle bar drive device includes a cam 31 connected to the main shaft 37, the cam groove 28 in the cam 31 is connected to the three-eye connecting rod 30 through the roller 29, the three-eye connecting rod 30 is connected to the needle bar drive shaft 18 through the third connecting rod 32, the needle bar drive shaft 18 is connected to the needle bar drive block 24 through the needle bar shift fork 23, and the needle bar drive block 24 is sleeved on the needle bar 1. The needle bar drive device is connected to a presser foot brake device. The presser foot brake device includes a shaft sleeve 14 with a first guide groove 16 connected to the top of the needle bar 1, a sliding limit rod 17 is installed in the first guide groove 16, the sliding limit rod 17 cooperates with the presser foot limit block 13, the presser foot limit block 13 is connected to the presser foot brake shaft 10, and the presser foot brake shaft 10 cooperates with the first connecting block 45. The outer periphery of the presser foot brake shaft 10 is sleeved with a brake return spring 11.

[0030] The presser foot brake device can brake the presser foot of the presser foot driving device under the control of the needle bar driving device, that is, the pressing force applied by the presser foot brake shaft 10 to the first connecting block 45 is increased on the basis of the pressing force exerted by the presser foot driving device on the presser foot itself. The combination of the two pressing forces enables the presser foot to have a balanced and effective pressing ability for fabrics of different thicknesses, thereby avoiding embroidery problems caused by insufficient pressing force on some thick fabrics.

[0031] An embroidery machine comprises the above-mentioned independent embroidery machine head.

[0032] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. An independent embroidery machine head, comprising a frame (12), a spindle-driven needle bar drive device, characterized in that: The frame (12) is equipped with a presser foot and needle nozzle linkage drive device; the presser foot and needle nozzle linkage drive device includes an independent motor (27), the independent motor (27) is connected to a synchronously moving presser foot drive device and a needle nozzle drive device through a transverse shaft (34), the presser foot drive device and the needle nozzle drive device are respectively located on both sides of the needle bar (1); the needle bar drive device is connected to a presser foot brake device; the presser foot drive device includes a presser foot (2), the presser foot (2) is connected to a presser foot drive rod (3), and the presser foot drive rod (3) is sleeved with a presser foot A lever (4) and a presser foot return spring (41), the presser foot lever (4) cooperates with a presser foot drive block (5), the presser foot drive block (5) is connected to a transverse shaft (34) through a presser foot connecting rod (40), the presser foot drive block (5) is sleeved with a first guide rod (33), the first guide rod (33) cooperates with a transverse mounting plate (19) of a frame (12); the presser foot drive rod (3) cooperates with a bottom plate (42) of the frame (12); the first guide rod (33) and the presser foot drive rod (3) are parallel to each other and are connected through a first connecting block (45).

2. The independent embroidery machine head according to claim 1, characterized in that: An electromagnet (6) for controlling the rotation direction of the presser foot driving block (5) is provided on the side of the presser foot driving block (5).

3. The independent embroidery machine head according to claim 1, characterized in that: The independent motor (27) is connected to the transverse shaft (34) via a belt group, and the belt group includes a driving wheel (8) connected to the independent motor (27), a driven wheel (7) connected to the transverse shaft (34), and a belt (9) connecting the driving wheel (8) and the driven wheel (7).

4. The independent embroidery machine head according to claim 1, characterized in that: The needle nozzle driving device includes a needle nozzle (26), the needle nozzle (26) is connected to the needle nozzle driving rod (25), the needle nozzle driving rod (25) is sleeved with a slider (36) that matches the guide groove (22), the slider (36) is connected to the rocker (20), and the rocker (20) is connected to the transverse shaft (34).

5. The independent embroidery machine head according to claim 1, characterized in that: The needle bar driving device comprises a cam (31) connected to a main shaft (37); a cam groove (28) in the cam (31) is connected to a three-eye connecting rod (30) via a roller (29); the three-eye connecting rod (30) is connected to a needle bar driving shaft (18) via a third connecting rod (32); the needle bar driving shaft (18) is connected to a needle bar driving block (24) via a needle bar shift fork (23); and the needle bar driving block (24) is sleeved with the needle bar (1).

6. The independent embroidery machine head according to claim 1, characterized in that: The presser foot brake device comprises a shaft sleeve (14) with a first guide groove (16) connected to the top of the needle rod (1), a sliding limit rod (17) installed in the first guide groove (16), the sliding limit rod (17) cooperates with the presser foot limit block (13), the presser foot limit block (13) is connected to the presser foot brake shaft (10), and the presser foot brake shaft (10) cooperates with the first connecting block (45); the outer periphery of the presser foot brake shaft (10) is sleeved with a brake return spring (11).

7. The independent embroidery machine head according to claim 1, characterized in that: The foot driving block (5) is provided with an axis hole (38), the outer periphery of the presser foot driving block (5) is provided with a slot (39) that matches the presser foot lever (4), and the bottom of the presser foot driving block (5) is provided with a torsion spring (50).

8. An embroidery machine, characterized in that: An independent embroidery machine head comprising any one of claims 1 to 7.

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