CN115976757A

CN115976757A - Embroidery machine head

Info

Publication number: CN115976757A
Application number: CN202310222412.9A
Authority: CN
Inventors: 陈天池
Original assignee: Zhejiang Pumeike Intelligent Embroidery Equipment Co ltd
Current assignee: Zhejiang Pumeike Intelligent Embroidery Equipment Co ltd
Priority date: 2017-03-06
Filing date: 2017-03-06
Publication date: 2023-04-18
Also published as: CN116254653A; CN106757881A

Abstract

The invention discloses an embroidery machine head, which comprises a presser foot transmission device, wherein the presser foot transmission device comprises a cam connected with a main shaft, the cam drives a V-shaped connecting rod with a downward opening, the V-shaped connecting rod with the downward opening is connected with a V-shaped connecting rod with an upward opening, and the V-shaped connecting rod with the upward opening is matched with a presser foot to move; the presser foot is connected with the needle rod, one end, close to the needle rod, of the V-shaped connecting rod with the upward opening has space interference relative to a needle rod frame for installing the needle rod, and a needle rod guide plate for avoiding the space is installed on the needle rod frame. According to the invention, the independent transmission system of the presser foot is realized through the V-shaped connecting rod structure with the upper opening and the lower opening in opposite directions, so that the driving stability is improved, the V-shaped connecting rod and the presser foot are matched to carry out arc track type separable driving, good differential matching is realized, and the cloth pressing noise of the presser foot is reduced.

Description

Embroidery machine head

The application is a divisional application of 'invention patent application CN201710133022.9 of a presser foot transmission device for an embroidery machine head' proposed in 2017, 3, month 6.

Technical Field

The invention relates to a presser foot transmission system of an embroidery machine, in particular to a presser foot transmission device for an embroidery machine head.

Background

The device for embroidering by matching with an embroidery needle on a needle rod in the head of an embroidery machine generally comprises a presser foot device, the transmission structure of the existing presser foot device is generally driven synchronously by separating a connecting rod from the needle rod transmission device, and the driving mode has the advantage of simple structure and has the defects that equipment noise is higher due to the fact that one set of transmission system needs to drive the needle rod and the presser foot, and the stability of the guide of the common set of transmission system of the needle rod and the presser foot is relatively poor. Of course, there is a technical consideration for separately driving the needle bar and the presser foot, that is, the presser foot is driven by the presser foot transmission system alone, but the internal space of the embroidery machine head is very limited in reality, and it is impossible to reserve a large amount of space for the technicians in the field. Therefore, how to arrange the presser foot transmission device in the narrow space of the nose is the object of research of the technicians in the field. On the other hand, as an important technical background, a presser foot which is sleeved with a needle rod and can press cloth downwards along with the needle rod generally is used, but the speed of the presser foot pressing cloth when the presser foot pressing cloth is close to a cloth surface is not too fast, the ideal state is close to zero, the too fast state can generate huge impact force and noise due to the presser foot pressing surface, an embroidery needle connected with the needle rod needs to penetrate the cloth surface at a high speed, namely two mutually sleeved parts of the needle rod and the presser foot need to generate two speeds, at present, the two driving speeds are completed through the two driving systems of the presser foot device and the needle rod, the speed of the presser foot is determined by the difference value between the speed driven by the needle rod and the reverse driving speed of the presser foot device, the difference value is smaller in real time and better, the difference value in the prior art is generally difficult to control, and how to control the difference value is one of the problems which need to be solved by the invention.

Disclosure of Invention

The invention provides a presser foot transmission device for an embroidery machine head, which has the advantages of accurate guide, stable driving and lower noise.

A presser foot transmission device for an embroidery machine head comprises a presser foot driven by a main shaft, the presser foot is connected with a needle rod, the needle rod is arranged on a needle rod frame, the presser foot transmission device is arranged between the main shaft and the presser foot, the presser foot transmission device comprises a cam connected with the main shaft, the cam drives a V-shaped connecting rod with a downward opening, the V-shaped connecting rod with the downward opening is connected with a V-shaped connecting rod with an upward opening, and the V-shaped connecting rod with the upward opening is matched with the presser foot to move. The presser foot transmission device realizes the independent transmission system of the presser foot through the V-shaped connecting rod structure with the upper opening and the lower opening in opposite directions, not only improves the driving stability, but also realizes the differential matching of the V-shaped connecting rod which belongs to a triangular connecting rod under the driving of a cam and the condition that the amplitude of the up-and-down swing is very stable relative to the presser foot, and reduces the cloth pressing noise. The differential matching is completely different from the prior art, the connecting rod driven by the existing presser foot is fixedly connected with the presser foot through a differential, namely, the needle bar driving force borne by the presser foot and the force of the connecting rod transmitted to the presser foot through the differential are offset up and down, the differential generated by the offset is in curve change due to the movement speed of the needle bar, and the driving force brought by the presser foot driving device cannot well match the speed of the curve change. The V-shaped connecting rod with the upward opening is matched with the presser foot to move, namely the V-shaped connecting rod and the presser foot can be separated (cannot be separated conventionally), and the connecting end of the V-shaped connecting rod with the upward opening and the presser foot is driven in a circular arc track in the process of driving the presser foot, namely the driving force of the presser foot is also in curve change and can be well matched with the speed driven by the needle rod, so that the cloth pressing silencing effect is achieved. The circular arc trajectory here drives the circular arc trajectory to be determined by the cam shape. The V-shaped connecting rod with the upward opening is attached to the presser foot, so that the stability of differential speed between the V-shaped connecting rod and the presser foot is further improved, and the differential speed value is small.

In order to further improve the stability and accuracy of transmission, a track groove is formed in the side face of the cam, a rolling body is arranged in the track groove and is connected with one end of a V-shaped connecting rod with a downward opening, a first transmission shaft is connected with a mounting hole in the middle of the V-shaped connecting rod with the downward opening, the other end of the V-shaped connecting rod with the downward opening is connected with one end of a V-shaped connecting rod with an upward opening through a connecting rod, a second transmission shaft is connected with a mounting hole in the middle of the V-shaped connecting rod with the upward opening, and the other end of the V-shaped connecting rod with the upward opening drives a presser foot to move. The transmission structure realizes the rotary support by one end in the middle of the V-shaped connecting rod, and the two ends are in transmission connection, thereby not only realizing good curve control of the stressed motion of the presser foot, but also forming the stress relation of up-down matching, and improving the transmission stability and accuracy. The motion track of the rolling body is positioned in a track groove below the main shaft, so that the stable swing amplitude of the V-shaped connecting rod is ensured.

The first transmission shaft is arranged on a side plate on the side surface of the embroidery machine head, and the second transmission shaft is arranged on a shell of the embroidery machine head; the first transmission shaft comprises a flange surface attached to the side plate, one side of the flange surface is provided with an installation shaft matched with the side plate, and the other side of the flange surface is provided with a connection shaft matched with an installation hole at one end of the middle of the V-shaped connecting rod with a downward opening; one end of the second transmission shaft is matched with a mounting hole in the shell of the embroidery machine head, and the other end of the second transmission shaft is matched with a mounting hole in the middle of the V-shaped connecting rod with an upward opening. This kind of mounting structure carries out the dislocation installation with the decurrent V-arrangement connecting rod of opening and the ascending V-arrangement connecting rod of opening, provides two different support positions, improves installation stability and silence effect, and single technical drawback who supports among traditional actuating system has been solved to this kind of mounting means.

The presser foot is divided into an upper piece and a lower piece of an upper structure and a lower structure, the upper piece and the lower piece are connected through a connecting piece of an integrated structure, a needle rod hole sleeved with a needle rod is formed in the connecting piece, the top of the upper piece is connected with a presser foot sliding sleeve, the presser foot sliding sleeve is sleeved with the needle rod, and the presser foot sliding sleeve and the needle rod hole form an upper structure and a lower structure and have two coaxial guide functions, so that the stability of the upper and lower operation of the presser foot is improved. The further technical scheme is that the upper sheet and the lower sheet are respectively positioned at the front side and the rear side of the needle rod, so that the up-and-down running stability of the presser foot is further improved.

The V-shaped connecting rod with the upward opening is connected with the presser foot through the presser foot sliding sleeve, the presser foot sliding sleeve comprises a sliding sleeve seat, one end of the sliding sleeve seat is connected with the presser foot upper piece, the other end of the sliding sleeve seat is matched with the V-shaped connecting rod with the upward opening, an upward convex guide sleeve is arranged in the middle of the sliding sleeve seat, and the guide sleeve is matched with the needle rod, so that the vertical running stability of the presser foot is improved.

In order to improve the silencing effect, a damping ring is arranged at the connecting end of the V-shaped connecting rod with the upward opening and the presser foot sliding sleeve.

The presser foot is driven by the transmission system separately, and the presser foot is connected with the V-shaped connecting rod with the upward opening, so that one end of the V-shaped connecting rod with the upward opening, which is close to the needle rod, has transverse space interference relative to a needle rod frame for installing the needle rod, a needle rod guide plate for avoiding the transverse space is installed on the needle rod frame, and a guide groove is arranged on the needle rod guide plate and is matched with a guide block installed on the needle rod. The lateral space interference means that if the needle bar frame extends horizontally transversely, the needle bar frame can touch the V-shaped connecting rod with an upward opening, and the technical problem that the independent driving of the presser foot cannot be realized at present is also caused. The needle bar guide plate avoiding the transverse space is arranged on the needle bar frame, and the guide block realizes the guide of the needle bar, so the technical problem is solved.

According to the invention, the independent transmission system of the presser foot is realized through the V-shaped connecting rod structure with the upper opening and the lower opening in opposite directions, so that the driving stability is improved, the V-shaped connecting rod and the presser foot are matched to perform arc track type separable driving, good differential matching is realized, and the cloth pressing noise of the presser foot is reduced.

Drawings

Fig. 1 is a schematic perspective view of a presser foot transmission device for an embroidery machine head according to the present invention;

FIG. 2 is a schematic view showing a structure of the present invention for partially blanking the presser foot driving device of the embroidery machine head;

FIG. 3 is a schematic view of the presser foot of the present invention;

FIG. 4 is a schematic view of a partial fry mounting arrangement of the present invention;

fig. 5 is a schematic view of the structure of the presser foot sliding sleeve of the present invention.

Detailed Description

As shown in fig. 1, 2, 3, 4 and 5, the presser foot transmission device for the embroidery machine head comprises a presser foot 16 driven by a main shaft 4, the presser foot 16 is connected with a needle rod 6, the needle rod 6 is arranged on a needle rod frame 25, and the presser foot transmission device is arranged between the main shaft 4 and the presser foot 6. The presser foot driving device comprises a cam 5 connected with a main shaft 4, the cam 5 drives a V-shaped connecting rod 8 with a downward opening, the V-shaped connecting rod 8 with the downward opening is connected with a V-shaped connecting rod 5 with an upward opening, and the V-shaped connecting rod 5 with the upward opening drives a presser foot 16 to move.

The cam 5 is preferably provided with a track groove 15 on the side surface, a rolling body 11 is arranged in the track groove 15, the rolling body 11 is connected with one end of a V-shaped connecting rod 8 with a downward opening, a first transmission shaft 10 is connected with a mounting hole at one end of the middle of the V-shaped connecting rod 8 with the downward opening, the other end of the V-shaped connecting rod 8 with the downward opening is connected with one end of a V-shaped connecting rod 5 with an upward opening through a connecting rod 12, a second transmission shaft 13 is connected with a mounting hole at one end of the middle of the V-shaped connecting rod 5 with the upward opening, and a presser foot 16 is driven by the other end of the V-shaped connecting rod 5 with the upward opening to move.

To further improve the stability, the first transmission shaft 10 is installed on the side plate 9 of the side of the embroidery machine head, and the second transmission shaft 13 is installed on the embroidery machine head housing 1. The first transmission shaft 10 comprises a flange face attached to the side plate 9, one side of the flange face is provided with a mounting shaft matched with the side plate, and the other side of the flange face is provided with a connecting shaft matched with a mounting hole at one end in the middle of a V-shaped connecting rod with a downward opening. The second transmission shaft 13 comprises a first shaft section and a second shaft section which have different shaft diameters, the first shaft section is matched with a mounting hole 17 on the embroidery machine head shell 1, and the second shaft section is matched with a mounting hole at one end of the middle of the V-shaped connecting rod 5 with an upward opening. Of course, one end of the second transmission shaft can be matched with a mounting hole on the embroidery machine head shell, and the other end of the second transmission shaft can be matched with a mounting hole at one end of the middle of the V-shaped connecting rod with an upward opening.

The structure design for the presser foot is as follows: the presser foot 16 is divided into an upper sheet 21 and a lower sheet 23 which are of an upper structure and a lower structure, a connecting sheet 22 which is of an integrated structure is arranged between the upper sheet and the lower sheet, a needle bar hole which is sleeved with a needle bar 6 is arranged on the connecting sheet, the top of the upper sheet is connected with a presser foot sliding sleeve 7, and the presser foot sliding sleeve is sleeved with the needle bar. The upper and lower pieces are respectively positioned at the front and rear sides of the needle bar 6. The V-shaped connecting rod 5 with the upward opening is connected with the presser foot 16 through the presser foot sliding sleeve 7, the presser foot sliding sleeve 7 comprises a sliding sleeve seat 18, one end of the sliding sleeve seat 18 is connected with a presser foot upper sheet 21, the other end of the sliding sleeve seat is matched with the V-shaped connecting rod 5 with the upward opening, a groove 20 is arranged at the matching position, a guide sleeve 19 protruding upwards is arranged in the middle of the sliding sleeve seat, and the guide sleeve 19 is matched with the needle rod 6. And a damping ring 24 is arranged at the connecting end of the V-shaped connecting rod with the upward opening and the presser foot sliding sleeve.

In order to solve the practical interference and improve the guide problem of the needle bar, one end of the V-shaped connecting rod 5 with an upward opening close to the needle bar has transverse spatial interference relative to a needle bar frame for mounting the needle bar, a needle bar guide plate 2 avoiding the transverse space is mounted on the needle bar frame, a guide groove is arranged on the needle bar guide plate 2, and the guide groove is matched with a guide block 3 mounted on the needle bar.

Claims

1. The embroidery machine head comprises a presser foot transmission device and is characterized in that the presser foot transmission device comprises a cam connected with a main shaft, the cam drives a V-shaped connecting rod with a downward opening, the V-shaped connecting rod with the downward opening is connected with a V-shaped connecting rod with an upward opening, and the V-shaped connecting rod with the upward opening is matched with a presser foot to move; the presser foot is connected with the needle rod, one end, close to the needle rod, of the V-shaped connecting rod with the upward opening has space interference relative to a needle rod frame for installing the needle rod, and a needle rod guide plate for avoiding the space is installed on the needle rod frame.

2. The embroidery machine head as claimed in claim 1, wherein the cam drives one end of a downwardly opening V-shaped link, and the other end of the downwardly opening V-shaped link is connected to one end of an upwardly opening V-shaped link by a link, and the other end of the upwardly opening V-shaped link is moved in cooperation with the presser foot.

3. The embroidery machine head as claimed in claim 2, wherein a first transmission shaft is connected to a mounting hole at one end of the middle of the downwardly opened V-shaped link, and the first transmission shaft is mounted to a side plate at a side of the embroidery machine head.

4. The embroidery machine head as claimed in claim 2, wherein a second transmission shaft is connected to a mounting hole at an intermediate end of the V-shaped link opened upward, and the second transmission shaft is mounted to the embroidery machine head housing.

5. The embroidery machine head as claimed in claim 3, wherein the first transmission shaft includes a flange surface attached to the side plate, and the flange surface has a mounting shaft on one side for engaging with the side plate and a connecting shaft on the other side for engaging with a mounting hole at one end of the middle of the V-shaped link with a downward opening.

6. The embroidery machine head according to claim 4, wherein one end of the second transmission shaft is fitted to a mounting hole of the embroidery machine head housing, and the other end is fitted to a mounting hole of a middle end of the V-shaped link opened upward; or the second transmission shaft comprises a first shaft section and a second shaft section, the first shaft section is matched with a mounting hole in the embroidery machine head shell, and the second shaft section is matched with a mounting hole in the middle end of the V-shaped connecting rod with a downward opening.

7. The embroidery machine head as claimed in claim 1, wherein the cam has a track groove formed in a side thereof, and a rolling body is provided in the track groove, and the rolling body is coupled to one end of a V-shaped link opened downward.

8. The embroidery machine head as claimed in claim 1, wherein the presser foot is a connecting piece having an integral structure of an upper piece and a lower piece, the connecting piece is provided with a needle bar hole for sleeving the needle bar, and the top of the upper piece is connected with a presser foot sliding sleeve for sleeving the needle bar.

9. The embroidery machine head as claimed in claim 1, wherein the connecting end of the V-shaped link with the presser foot opened upward is driven in a circular arc trajectory in the course of engaging with the presser foot.

10. The embroidery machine head as claimed in claim 1, wherein the V-shaped link with the upward opening is connected with the presser foot by a presser foot sliding sleeve, the presser foot sliding sleeve comprises a sliding sleeve seat, one end of the sliding sleeve seat is connected with the presser foot, the other end of the sliding sleeve seat is matched with the V-shaped link with the upward opening, an upward protruding guide sleeve is arranged in the middle of the sliding sleeve seat, and the guide sleeve is matched with the needle rod.

11. The embroidery machine head as claimed in claim 1, wherein the V-shaped link with the upward opening is connected with the presser foot through a presser foot sliding sleeve, and a damping ring is arranged at the connecting end of the V-shaped link with the upward opening and the presser foot sliding sleeve.