CN-224227411-U - Conjugate cam presser foot driving device and embroidery machine

CN224227411UCN 224227411 UCN224227411 UCN 224227411UCN-224227411-U

Abstract

The utility model discloses a conjugate cam presser foot driving device and an embroidery machine, and relates to the embroidery technology, wherein the conjugate cam presser foot driving device comprises a conjugate connecting rod assembly driven by a conjugate cam, 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 rotationally connected with a first conjugate connecting rod pin and a presser foot driving connecting rod rotationally 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 drives the driving connecting rod to rotate, the presser foot driving part is arranged below a positioning block, the positioning block is connected with the presser foot, and the presser foot driving connecting rod is synchronous with lifting of the presser foot when the presser foot is driven to work, so that the presser foot driving part always keeps contact with the bottom surface of the presser foot positioning block.

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 conjugate cam presser foot driving device comprises a conjugate cam arranged on a main shaft and a conjugate connecting rod assembly driven by the conjugate cam, and is characterized in that 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, and the presser foot driving connecting rod is synchronous with lifting of the presser foot when driving the presser foot, so that the presser foot driving part is always kept in contact with the bottom surface of the positioning block.
2. The conjugate cam presser foot drive 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 forming a link angle therebetween.
3. The conjugate cam presser foot driving device according to claim 2, wherein the second ends of the first and second link segments are connected by a connecting segment, and a link adjusting structure is provided between the connecting segment and the second end of the first and/or second link segments, and the link angle is adjusted by the link adjusting structure.
4. The conjugate cam presser foot driving device of claim 3, wherein the connecting section is integrally provided with the first connecting section, and the connecting rod adjusting structure comprises a fixing hole formed in the second connecting rod section, an adjusting hole formed in the connecting section, and a locking screw connecting the adjusting hole and the fixing hole.
5. The conjugate cam presser foot drive arrangement of claim 1, wherein the first drive section is provided with a first roller and the second drive section is provided with a second roller, the first roller engaging the inner cam surface and the second roller engaging the outer cam surface.
6. The conjugate cam presser foot driving device according to claim 1, wherein the presser foot positioning block is movably sleeved with a needle bar, a bottom dead center is fixed above the presser foot positioning block by the needle bar, a presser foot spring is movably sleeved on the needle bar, 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 a presser foot working stroke.
7. The conjugate cam presser foot drive arrangement of claim 1, wherein the conjugate link assembly further comprises an intermediate link, both ends of the intermediate link being connected to the first ends of the conjugate link and the presser foot drive link, respectively.
8. The conjugate cam presser foot drive arrangement of claim 1, wherein the presser foot drive link is a V-shaped link and the presser foot drive section is provided at a second end of the presser foot drive link.
9. The conjugate cam presser foot drive arrangement of claim 8, wherein said presser foot drive section is provided with a third roller.
10. Embroidery machine characterized by comprising a conjugate cam presser foot driving device according to any one of claims 1 to 9.

Description

Conjugate cam presser foot driving device 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. [ 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 problem of increased axial space caused by the simultaneous arrangement of the first cam and the second cam in the prior art is solved, 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: 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 drives the presser foot driving 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, and the presser foot driving connecting rod is synchronous with lifting of the presser foot during the operation of driving the presser foot, so that the presser foot driving part is always kept in contact with the bottom surface of the positioning block. Preferably, the conjugate link includes a first link segment and a second link segment, the first ends of the first link segment and the second link segment are rotatably connected with the first conjugate link pin and form a link angle therebetween. Preferably, the second ends of the first connecting rod section and the second connecting rod section are connected through a connecting section, a connecting rod adjusting structure is arranged between the connecting section and the second ends of the first connecting rod section and/or the second connecting rod section, and the connecting rod included angle is adju