阅读说明：本技术 一种用于独立压脚绣花机机头的绣线导引和绣针防护装置 (Embroidery thread guiding and embroidery needle protecting device for independent presser foot embroidery machine head ) 是由 陈天龙 方狄永 蔡洁钟 陈斌 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种用于独立压脚绣花机机头的绣线导引和绣针防护装置,包括导引防护板和至少一个连接机构,所述连接机构固定连接所述导引防护板,所述连接机构直接或间接连接在针杆架,在刺绣时,所述导引防护板位于压脚压布端的动程最高点的上方,并且位于针杆底端的动程最低点的下方,所述导引防护板位于每个绣针正下方处均设置有过针孔。本发明的有益效果在于,解决了停工的绣线对绣针产生斜向张拉的技术问题,使得无论出于工作状态还是停工状态的绣针受到的作用力均为竖直方向,起到了防止绣针变形和绣线被拉毛拉断的保护作用。(The invention discloses an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, which comprises a guiding protection plate and at least one connecting mechanism, wherein the connecting mechanism is fixedly connected with the guiding protection plate, the connecting mechanism is directly or indirectly connected with a needle bar frame, the guiding protection plate is positioned above the highest point of the movement of a presser foot cloth pressing end and below the lowest point of the movement of the bottom end of the needle bar during embroidery, and a needle passing hole is formed in the position of the guiding protection plate, which is positioned under each embroidery needle. The embroidery needle tensioning device has the advantages that the technical problem that the embroidery needle is obliquely tensioned by the embroidery thread which is in a shutdown state is solved, so that the acting force applied to the embroidery needle in the working state or the shutdown state is in the vertical direction, and the protection effects of preventing the embroidery needle from deforming and preventing the embroidery thread from being napped and broken are achieved.)

1. The embroidery thread guiding and embroidery needle protecting device for the machine head of the independent presser foot embroidery machine is characterized by comprising a guiding protecting plate and at least one connecting mechanism, wherein the connecting mechanism is fixedly connected with the guiding protecting plate, the connecting mechanism is directly or indirectly connected with a needle bar frame, the guiding protecting plate is positioned above the highest point of the movement of the presser foot cloth pressing end and below the lowest point of the movement of the bottom end of the needle bar during embroidery, and a needle passing hole is formed in the position, under each embroidery needle, of the guiding protecting plate.

2. The thread guide and needle guard for an independent presser foot embroidery machine head as claimed in claim 1, wherein said connecting mechanism has a lifting structure for lifting said guide guard upward when said guide guard is subjected to an upward force.

3. The thread guide and needle guard for an independent presser foot embroidery machine head as claimed in claim 2, wherein said connecting mechanism comprises a first connecting member slidably connected or connected to a second connecting member in a vertical direction, said first connecting member being connected to said needle bar frame, and a second connecting member connected to said guide guard.

4. The thread guide and needle guard for an independent presser foot embroidery machine head as claimed in claim 3, wherein said connecting mechanism further comprises a connecting member configured as a connecting seat fixed to said needle bar frame, said first connecting member being fixed to said connecting seat.

5. The embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head as claimed in claim 3, wherein the connecting mechanism further comprises a connecting member configured as a connecting seat, the connecting seat is fixed to the lower thread fixed to the needle bar frame, the lower thread has a plurality of through holes for allowing the embroidery thread to pass through, and the first connecting member is fixed to the connecting seat.

6. The thread guide and needle guard for an independent presser foot embroidery machine head as claimed in claim 4 or 5, wherein said connecting mechanism is equipped with a return spring for returning said guide guard after lifting.

7. The thread guide and needle guard for an independent presser foot embroidery machine head as claimed in claim 4 or 5, wherein said needle bar frame is mounted with a lifting cylinder, a piston rod of said lifting cylinder being connected to said guide guard plate.

8. The embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head as claimed in claim 2, wherein the connecting mechanism comprises a connecting piece and a sleeve piece, the top end and the bottom end of the connecting piece are respectively connected with the sleeve piece and the guiding protection plate, and the sleeve piece is slidably sleeved on the needle rod.

9. The embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head as claimed in claim 8, wherein said needle bar is sleeved with a restoring spring, the top end of said restoring spring is connected to the lower dead point of said needle bar, and the bottom end of said restoring spring is connected to said sleeve member for resetting after said guiding protection plate is lifted.

10. The thread guide and embroidery needle guard for an independent presser foot embroidery machine head as claimed in claim 8, wherein said needle bar frame is mounted with a lift cylinder, a piston rod of said lift cylinder being connected to said guide guard plate or said connecting mechanism.

11. The thread guide and needle guard assembly for an independent presser foot embroidery machine head as claimed in claim 1, wherein said presser foot has a presser end of an open configuration.

Technical Field

The invention relates to an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, which is mainly applied to the technical field of embroidery machines.

Background

In the prior art of the embroidery machine, a pressure foot of a part of the embroidery machine is linked with a needle rod, the pressure foot is sleeved on the needle rod through a pressure foot spring, namely, the operation of the needle rod drives the pressure foot to operate, and the non-independent pressure foot has the following problems: the main shaft of the embroidery machine has relatively large load, so that the transmission accuracy of the main shaft is influenced; the movement of the presser foot is relatively large, which results in relatively large vibrations and noise of the machine.

The presser foot of part embroidery machine is independent presser foot, and the spatial position and the drive of presser foot and needle bar are independent mutually promptly, can solve above-mentioned defect: the needle bar needs to be matched with the rotating shuttle to perform embroidery, so that high precision is needed, the presser foot only needs to press the cloth when the machine needle penetrates into and leaves the cloth, the precision requirement is relatively low, and the precision of the needle bar in high-speed operation can be improved after the main shaft is driven by the presser foot; the function of the presser foot is that the presser foot presses cloth, theoretically, the smaller the movement is, the better the presser foot is, because the smaller the movement is, the smaller the inertia generated by the presser foot is, thereby improving the operation speed of the needle bar and realizing the ultra-high speed needle bar embroidery, the technical purpose can be realized by the independent drive of the presser foot, and the movement of the presser foot can be set below 10mm through the design of the independent presser foot.

Referring to fig. 1, the structure of the presser foot a is currently in the prior art, most of which is provided with a single hole a for allowing an embroidery thread to pass through, and the presser foot a of this structure is suitable for a single color embroidery thread (only one embroidery thread is embroidered), but is defective in handling a multi-color embroidery thread (multiple embroidery threads are embroidered): as shown in figure 1, when three embroidery threads with different colors, namely an embroidery thread B-1, an embroidery thread B-2 and an embroidery thread B-3, are used for embroidering, the three embroidery threads all pass through a single hole a of a presser foot A, so that the phenomenon that the different embroidery threads are mutually wound can occur, the phenomenon can cause that the embroidery threads with various colors are mutually wound and embroidered on the cloth, and the effect of separately and alternately embroidering various colors can not be realized. When changing color (changing embroidery thread), as shown in fig. 1, the embroidery thread B-1 and the embroidery needle C-1 are in a working state, the embroidery thread B-2, the embroidery needle C-2, the embroidery thread B-3, and the embroidery needle C-3 are in a shutdown state, at this time, the embroidery thread B-1 is in a vertical tension state, and the embroidery thread B-2 and the embroidery thread B-3 are in an oblique tension state, and in this state, the embroidery thread B-2 and the embroidery thread B-3 generate oblique tension acting force on the embroidery needle C-2 and the embroidery needle C-3, which easily causes bending deformation of the embroidery needle, and at the same time, the embroidery thread is also easily broken and napped.

Disclosure of Invention

The invention aims to provide an embroidery thread guiding and embroidery needle protecting device for an independent presser foot embroidery machine head, which solves the technical problem that the embroidery needle is obliquely tensioned by the embroidery thread in the shutdown state, so that the acting force applied to the embroidery needle in the working state or the shutdown state is in the vertical direction, and the protection effect of preventing the embroidery needle from deforming and the embroidery thread from being napped and broken is achieved.

The invention is realized by the following technical scheme.

The embroidery thread guiding and embroidery needle protecting device for the machine head of the independent presser foot embroidery machine comprises a guiding protecting plate and at least one connecting mechanism, wherein the connecting mechanism is fixedly connected with the guiding protecting plate, the connecting mechanism is directly or indirectly connected with a needle bar frame, the guiding protecting plate is positioned above the highest point of the movement of the presser foot cloth pressing end and below the lowest point of the movement of the bottom end of the needle bar during embroidery, and needle passing holes are formed in the positions, under each embroidery needle, of the guiding protecting plate.

By arranging the guide protection plate and the needle passing hole, firstly, the stop embroidery thread has a limiting effect, the part of the stop embroidery thread between the embroidery needle and the guide protection plate is in a vertical state, and the part of the stop embroidery thread between the guide protection plate and the cloth is in an oblique state, namely the stop embroidery thread acts in the direction of the tensioning force of the stop embroidery needle vertically downwards; secondly, the position of the guide protection plate does not interfere with the needle bar and the presser foot, and the embroidery interference is avoided.

Furthermore, the connecting mechanism is provided with a lifting structure, and the guide protection plate can be driven to be lifted upwards when the guide protection plate is subjected to upward acting force.

After embroidery is finished, the presser foot needs to be lifted, the presser foot is pressed down after cloth is replaced, and the guide protection plate can be lifted when the presser foot is lifted by the lifting structure, so that cloth replacement is not influenced.

Further, the connecting mechanism comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with the second connecting piece in a sliding mode or in a sliding mode, the sliding direction is the vertical direction, the first connecting piece is connected with the needle bar frame, and the second connecting piece is connected with the guide protection plate.

The first connecting piece and the second connecting piece are connected in a sliding mode, and the function of guiding the protection plate to ascend and descend is achieved in a telescopic mode of the connecting mechanism.

Furthermore, the connecting mechanism further comprises a connecting part which is a connecting seat, the connecting seat is fixed on the needle bar frame, and the first connecting part is fixed on the connecting seat.

The connecting seat is fixed with the needle bar frame, namely, the connecting mechanism is directly connected with the needle bar frame.

Furthermore, the connecting mechanism further comprises a connecting part which is a connecting seat, the connecting seat is fixed on the lower threading wire which is fixed on the needle bar frame, the lower threading wire is provided with a plurality of through holes for allowing embroidery threads to pass through, and the first connecting part is fixed on the connecting seat.

The connecting seat is connected with the lower thread, namely, the connecting mechanism is indirectly connected with the needle bar frame, and the through hole arranged on the lower thread can allow the embroidery thread to pass through, so that the embroidery thread is prevented from floating, and the stability of the embroidery thread can be improved.

Further, the connecting mechanism is provided with a return spring for returning the guide protection plate after being lifted.

The restoring spring is arranged as a restoring part of the lifting rear connecting mechanism, so that the connecting mechanism and the guide protection plate can be rapidly restored on one hand, and the structure is simple on the other hand, and the installation space of the embroidery machine can be saved.

Furthermore, a lifting cylinder is installed on the needle bar frame, and a piston rod of the lifting cylinder is connected with the guide protection plate.

The lifting cylinder is used as a power component for lifting and pressing the connecting mechanism, so that the operation of the presser foot and the cloth changing efficiency can be facilitated.

Further, coupling mechanism includes connecting piece, external member, the top and the bottom of connecting piece are connected respectively the external member with the guide guard plate, the external member slip cover is established the needle bar.

The sleeve is sleeved on the needle rod in a sliding manner, namely, the connecting mechanism is indirectly connected with the needle rod frame.

Further, the needle bar cover is equipped with the recovery spring, the top of recovering the spring is connected the lower dead center of needle bar, the bottom of recovering the spring is connected the external member, be used for the guide guard plate promotes the back and resets.

Furthermore, a lifting cylinder is installed on the needle bar frame, and a piston rod of the lifting cylinder is connected to the guide protection plate or the connecting mechanism.

Further, the cloth pressing end of the presser foot is of an open structure.

Compared with a single hole, the opening structure can avoid various embroidery threads from being wound, on one hand, the situation that the embroidery threads are broken and napped can be avoided, and on the other hand, the quality of embroidery is improved.

The invention has the beneficial effects that:

set up mounting panel and cross the pinhole, can make the embroidery line of shut down be vertical direction rather than the slant to the stretch-draw effort of embroidery needle, not only avoid appearing the condition of embroidery needle bending deformation, also can avoid the condition of embroidery line snapping, and the position setting of guide guard plate also can not lead to the fact the interference to needle bar and presser foot, coupling mechanism's lifting function and reset function are convenient for the presser foot to lift and the change of cloth, whole device structural design is ingenious, the result of use preferred, not only played the embroidery needle, the guard action of cloth, also can improve the quality of embroidery.

Drawings

FIG. 1 is a schematic view of a needle, presser foot, and thread of the prior art;

FIG. 2 is a schematic structural diagram of embodiment 1;

FIG. 3 is a schematic view of the structure of the embroidery needle, presser foot and thread according to embodiment 1;

FIG. 4 is a schematic structural diagram of embodiment 2;

FIG. 5 is a schematic structural diagram of embodiment 3;

FIG. 6 is a schematic structural diagram of embodiment 4;

FIG. 7 is a schematic structural diagram of embodiment 5;

FIG. 8 is a schematic structural diagram of embodiment 6;

fig. 9 is a schematic structural diagram of embodiment 7.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples.