CN-224227412-U - Conjugate cam embroidery machine head and embroidery machine

CN224227412UCN 224227412 UCN224227412 UCN 224227412UCN-224227412-U

Abstract

The utility model discloses a conjugate cam embroidery machine head and an embroidery machine, relates to the embroidery technology, solves the problems of combining a needle bar with a needle bar driver and matching a presser foot with a presser foot driver by pressing the needle bar, reduces axial space and can reduce noise when the presser foot works. The needle pressing rod structure comprises a needle rod, a driving shaft, a needle pressing rod motor and a pressing rod, wherein the needle rod driver is movably installed on the driving shaft, a bottom dead center is fixed on the needle rod, the needle pressing rod motor drives the pressing rod, and the pressing rod presses down the needle rod, so that the needle rod driver corresponds to the bottom dead center in position in height, the needle rod driver is movably connected with the bottom dead center, and the needle rod is driven through the bottom dead center. The conjugate cam presser foot driving device comprises a conjugate cam arranged on the main shaft and a conjugate connecting rod assembly driven by the conjugate cam, wherein the conjugate cam is provided with an inner cam surface and an outer cam surface.

Inventors

SHEN ZHONGWEI
WANG HAIJIANG
LIU SHUAI
LUO HANGFEI

Assignees

浙江信胜科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250507

Claims (10)

1. The needle pressing rod structure comprises a needle rod, a driving shaft, a needle pressing rod motor and a pressing rod, wherein the driving shaft is movably provided with a needle rod driver, a bottom dead center is fixed on the needle rod, the pressing rod is driven by the needle pressing rod motor to press down the needle rod, so that the needle rod driver corresponds to the bottom dead center in height, and the needle rod driver is movably connected with the bottom dead center and drives the needle rod through the bottom dead center; The conjugate cam presser foot driving device comprises a conjugate cam mounted on a main shaft and a conjugate connecting rod assembly driven by the conjugate cam, wherein the conjugate cam is provided with an inner cam surface and an outer cam surface, the conjugate connecting rod assembly comprises a conjugate connecting rod rotatably connected with a first conjugate connecting rod pin and a presser foot driving connecting rod rotatably connected with a second conjugate connecting rod pin, the conjugate connecting rod is provided with a first transmission part and a second transmission part, the presser foot driving connecting rod is provided with a presser foot driving part, the first transmission part is matched with the inner cam surface, the second transmission part is matched with the outer cam surface, the conjugate cam drives the conjugate connecting rod to rotate through the first transmission part and the second transmission part, the conjugate connecting rod is driven by the conjugate connecting rod to rotate, the presser foot driving part is arranged below a presser foot positioning block, the presser foot positioning block is connected with a presser foot, after a needle bar is pressed down by a needle bar structure, the presser foot driving part is abutted against the bottom surface of the presser foot positioning block, and the presser foot driving connecting rod is synchronous with lifting presser foot of the presser foot when driving works, so that the presser foot driving part always keeps contact with the bottom surface of the presser foot positioning block.
2. The conjugate cam embroidery machine head of claim 1 wherein the conjugate link comprises a first link segment and a second link segment, the first ends of the first link segment and the second link segment being rotatably connected to the first conjugate link pin and the first ends of the first link segment and the second link segment forming a link angle therebetween.
3. The conjugate cam embroidery machine head of claim 2, wherein the second ends of the first and second link segments are connected by a connecting segment, and a link adjustment structure is provided between the connecting segment and the second ends of the first and/or second link segments, and the link angle is adjusted by the link adjustment structure.
4. The conjugate cam embroidery machine head of claim 1 wherein the first transmission portion is provided with a first roller and the second transmission portion is provided with a second roller, the first roller engaging the inner cam surface and the second roller engaging the outer cam surface.
5. The conjugate cam embroidery machine head of claim 1, wherein the presser foot positioning block is movably sleeved with a needle bar, the bottom dead center is located above the presser foot positioning block, the needle bar is movably sleeved with a presser foot spring, the upper end of the presser foot spring is abutted against the bottom dead center, the lower end of the presser foot spring is abutted against the presser foot positioning block, and the presser foot spring is always compressed during the working stroke of the presser foot.
6. The conjugate cam embroidery machine head of claim 1 wherein the conjugate linkage assembly further comprises an intermediate linkage, wherein two ends of the intermediate linkage are connected to the first ends of the conjugate linkage and the presser foot drive linkage, respectively, and/or wherein the presser foot drive linkage is a V-shaped linkage, and wherein the presser foot drive section is provided at the second end of the presser foot drive linkage.
7. The conjugate cam embroidery machine head of claim 1 wherein the plunger is rotatably mounted above the needle bar, the plunger has a push-down section on a first side of the pivot for pushing down the needle bar, the output shaft of the needle bar motor is connected with a cam, the plunger has a lift section on a second side of the pivot, and the cam cooperates with the lift section when the needle bar is pushed down for driving the lift section to lift upward.
8. The machine head of claim 7, wherein an included angle is formed between the pressing section and the lifting section, and/or a downward extending section is arranged at the connecting part of the pressing section and the lifting section, and the downward extending section is connected with the pivot shaft.
9. The conjugate cam embroidery machine head of claim 7 wherein the plunger is connected with a first torsion spring for effecting the ascent of the hold-down section.
10. Embroidery machine characterized by comprising a conjugate cam embroidery machine head according to any one of claims 1 to 9.

Description

Conjugate cam embroidery machine head and embroidery machine [ Field of technology ] The utility model belongs to the technical field of embroidery equipment, and particularly relates to an embroidery machine. [ Background Art ] In the technical field of embroidery machines, the driving of the presser foot is divided into two types, one type is combined with the motion of the needle bar, the needle bar drives the presser foot to reciprocate, the other type is an independent presser foot, the independent power source drives the independent presser foot to reciprocate, and the reciprocating elevating motions of the independent presser foot and the needle bar are not mutually interfered. The use of independent presser feet is becoming more and more common at present. The Chinese patent application of CN 117802706A discloses a differential matching device of a presser foot, which comprises a main shaft, a first cam, a second cam, a needle bar, a presser foot, a first transmission piece and a presser foot driving block, wherein the first cam and the second cam are arranged on the main shaft, the presser foot is sleeved on the needle bar in a sliding way, the first transmission piece is provided with a first rotating pivot, the presser foot driving block is capable of moving up and down, the transmission piece is directly or indirectly movably connected with the presser foot driving block, the transmission piece is provided with a first roller and a second roller, the first roller is in rolling fit with the outer cam surface of the first cam to enable the presser foot driving block to be in rolling fit with the ascending stroke of the presser foot, and the second roller is in rolling fit with the outer cam surface of the second cam to enable the presser foot driving block to be in fit with the descending stroke of the presser foot. The lifting stroke and the descending stroke of the independent presser foot can be completed only by arranging the first cam and the second cam on the main shaft at the same time, so that the axial space of the embroidery machine head is enlarged. In addition, the second transmission site and the presser foot positioning block are not always kept in contact in the working stroke of the presser foot, and each time the second transmission site and the presser foot positioning block are contacted, collision can be generated, and noise is increased. In addition, in the prior art, the needle bar is also provided with a top dead center above the bottom dead center, and the needle bar is matched with the middle beam on the needle bar frame above through the top dead center to stop at the highest position of the up-and-down movement of the needle bar driver and the presser foot driver, so that the bottom dead center can be combined with the needle bar driver. But can collide with the middle beam of the needle bar frame when the upper dead point is limited during working, and noise is generated. To avoid this noise, the applicant intends to cancel the top dead center, the bottom dead center is always combined with the needle bar driver during operation, and the maximum working stroke of the needle bar driver ensures that the bottom dead center does not collide with the needle bar frame, so that the noise is reduced during operation, but before the needle bar and the presser foot work, the needle bar needs to be pressed down by adopting a needle bar pressing structure to combine the bottom dead center with the needle bar driver, and the presser foot is matched with the presser foot driver. [ utility model ] Aiming at the defects in the prior art, the technical problem to be solved by the utility model is to provide the conjugate cam presser foot driving device and the embroidery machine, so that the problems of combining a needle bar with a needle bar driver and matching a presser foot with a presser foot driver by pressing the needle bar are solved, and meanwhile, the axial space is reduced, and the noise of the presser foot during working can be reduced. In order to solve the technical problems, the utility model adopts the following technical scheme: Firstly, a conjugate cam embroidery machine head is provided, which comprises a needle pressing rod structure and a conjugate cam presser foot driving device, wherein the needle pressing rod structure comprises a needle rod, a driving shaft, a needle pressing rod motor and a pressing rod, a needle rod driver is movably arranged on the driving shaft, a bottom dead center is fixed on the needle rod, the pressing rod is driven by the needle pressing rod motor to enable the pressing rod to press down the needle rod, so that the needle rod driver corresponds to the bottom dead center in height, and the needle rod driver is movably connected with the bottom dead center and drives the needle rod through the bottom dead center; The conjugate cam presser foot driving device comprises a conjugate cam mounted on a main shaft and a conjugate connecting rod