CN217266252U

CN217266252U - Needle selector for jacquard

Info

Publication number: CN217266252U
Application number: CN202221084236.4U
Authority: CN
Inventors: 邓才参; 夏伟华
Original assignee: Zhaoqing Litai Electronic Products Co ltd
Current assignee: Zhaoqing Litai Electronic Products Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-08-23
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses a needle selector for a jacquard, which comprises a shell, a plurality of tool bits arranged in the shell and a plurality of corresponding electromagnets, the front end of the cutter head is used for pressing a jacquard sheet of the jacquard, the middle part of the cutter head is rotatably arranged on the shell through a rotating shaft, the rear end of the cutter head is close to the end surface of the iron core of the electromagnet, the rear end of the cutter head is provided with a permanent magnet which is used for acting with the electromagnet, when the electromagnet is electrified with currents in different directions, the cutter head swings to a position a and a position b respectively under the action of the magnetic force of the electromagnet, the cutter head is contacted with the working surface of the jacquard sheet when swinging to the position a, and is separated from the working surface of the jacquard sheet when swinging to the position b, when the cutter head swings to the position a, the cutter head is perpendicular to the working surface of the jacquard sheet, so that the front end of the cutter head is in surface contact with the working surface of the jacquard sheet. The utility model discloses reducible jacquard piece wearing and tearing, reduce cost improves stability and reliability.

Description

Needle selector for jacquard

Technical Field

The utility model mainly relates to a select the needle ware field, especially relate to the needle ware of selecting on the jacquard machine.

Background

The needle selector is an automatic control component applied to a circular knitting machine. Under the control of a computer, the needle selector can ensure that the fabric woven by the circular knitting machine has rich patterns and colors. Generally, in a needle selector driven based on an electromagnetic principle, electromagnets of the needle selector correspond to tool bits with permanent magnets one by one, the permanent magnets on the tool bits face the end faces of iron cores of the electromagnets, and the tool bits can be driven to swing up and down by changing the polarities of the electromagnets by taking a fixed shaft of the tool bits as a circle center.

Taking a jacquard circular knitting machine as an example, the cutter head swings up and down, when the cutter head swings upwards, the front end of the cutter head contacts the raised feet of the jacquard sheet of the jacquard machine, and when the machine runs, the cutter head presses the jacquard sheet into the needle cylinder; when the cutter head swings downwards, the cutter head penetrates through the middle of the two raised feet of the jacquard sheet, is staggered with the jacquard sheet and does not contact the raised feet of the jacquard sheet, and the jacquard sheet cannot be pressed. The jacquard control purpose is realized by switching the pressing-in state and the non-pressing-in state.

At present, on a circular jacquard knitting machine, the central line of the swing included angle of a cutter head 3 of a needle selector is generally positioned on a horizontal line, referring to fig. 1, when the cutter head 3 swings upwards to contact with a jacquard sheet 7, the cutter head 3 is inclined to the working surface of the jacquard sheet 7, only the corner of the cutter head 3 contacts with the working surface of the jacquard sheet 7, namely the front end of the cutter head 3 is in point contact or line contact with the working surface of the jacquard sheet 7. Because the contact area is small, the force applied during working is concentrated on one point, the pressure intensity applied to the jacquard sheet 7 is very high, the requirements on the material and the hardness of the material of the jacquard sheet 7 and the tool bit 3 of the needle selector are very high, the jacquard sheet 7 is easy to wear, the jacquard sheet 7 needs to be replaced frequently, and the cost is increased. Even more, the unpredictable wear of the pattern piece 7 during operation can lead to misfires and consequently to scrapping of the cloth.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in: aiming at the defects in the prior art, the needle selector for the jacquard machine is provided, which can reduce the abrasion of the jacquard sheet, reduce the cost and improve the stability and the reliability.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a needle selector for a jacquard comprises a shell, a plurality of cutter heads and a plurality of corresponding electromagnets, wherein the cutter heads are installed in the shell, the front ends of the cutter heads are used for pressing jacquard sheets of the jacquard, the middle parts of the cutter heads are rotatably installed on the shell through rotating shafts, the rear ends of the cutter heads are close to the end faces of iron cores of the electromagnets, permanent magnets used for acting with the electromagnets are installed at the rear ends of the cutter heads, when the electromagnets are powered on with currents in different directions, the cutter heads swing to a position a and a position b respectively under the action of the magnetic force of the electromagnets, the cutter heads contact with the working faces of the jacquard sheets when swinging to the position a, and the cutter heads are perpendicular to the working faces of the jacquard sheets when swinging to the position a, so that the front ends of the cutter heads are in surface contact with the working faces of the jacquard sheets.

As a further improvement, when the cutter head swings to the position a, the cutter head is in a horizontal state.

As a further improvement, the knife head swing included angle central line and the horizontal plane form a certain included angle, and the central line of the electromagnet coincides with the knife head swing included angle central line.

As a further improvement of the utility model, the shell is provided with a plurality of limiting grooves for the movement of the cutter head, so as to limit the swing angle of the cutter head.

As the utility model discloses a further improvement, it is a plurality of the tool bit is arranged along vertical direction and is installed in the casing, and the tool bit luffing motion in vertical plane.

As a further improvement of the utility model, two permanent magnets are installed at the rear end of the cutter head, and the magnetic pole arrangement of the two permanent magnets is opposite.

As a further improvement of the utility model, two permanent magnets are arranged up and down.

Compared with the prior art, the utility model has the advantages of: the utility model discloses a select the needle ware when the tool bit swings to the position with the working face contact of jacquard sheet, the working face of tool bit just perpendicular to jacquard sheet makes the front end of tool bit and the working face of jacquard sheet form the face contact to increase area of contact, reduce the pressure that the jacquard sheet received, can reduce the wearing and tearing of jacquard sheet effectively, reduce the replacement cost of jacquard sheet, the durability of jacquard sheet increases moreover, also can guarantee the stability and the reliability of jacquard weave.

Drawings

Fig. 1 is a schematic diagram of the matching of a selector and a jacquard sheet when a tool bit swings to two different positions respectively in the prior art.

Fig. 2 is a schematic structural diagram of the present invention (the tool bit swings to the a position).

Fig. 3 is a schematic structural diagram of the present invention (the tool bit swings to the position b).

Fig. 4 is a schematic view of the fit between the needle selector and the jacquard sheet when the cutter head swings to two different positions respectively.

Fig. 5 is a left side view of fig. 2 (with the cutting head removed).

Reference numerals: a housing 1; a drive circuit board 2; a cutter head 3; an electromagnet 4; a rotating shaft 5; a permanent magnet 6; a jacquard sheet 7; a limiting groove 8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, and it should be noted that the scope of the present invention is not limited to the following embodiments, and any modifications and decorations made by the present invention should be considered as the scope of the present invention without departing from the principle of the present invention.

As shown in fig. 2 and 3, the needle selector for jacquard of the present invention comprises a housing 1, a driving circuit board 2 installed in the housing 1, a plurality of tool bits 3 and a plurality of corresponding electromagnets 4, wherein each tool bit 3 corresponds to one electromagnet 4. In the present embodiment, 8

cutter heads

3 and 8 electromagnets 4 are provided, only 4 electromagnets 4 are shown in fig. 2 and 3, and the other 4 electromagnets 4 are mounted on the back side of the housing 1. The front end of the cutter head 3 is used for pressing a jacquard sheet 7 of the jacquard, the middle part of the cutter head 3 is rotatably arranged on the shell 1 through a rotating shaft 5, the rear end of the cutter head 3 is close to the end surface of an iron core of the electromagnet 4, and the rear end of the cutter head 3 is provided with a permanent magnet 6 used for acting with the electromagnet 4. Preferably, there are two permanent magnets 6, and the magnetic poles of the two permanent magnets 6 are arranged oppositely, that is, the magnetic poles of the surface of the two permanent magnets 6 facing the electromagnet 4 are opposite. In other embodiments, there may be one permanent magnet 6, and both poles of the permanent magnet 6 face the electromagnet 4. When the electromagnet 4 is electrified with currents in different directions, the cutter head 3 swings to a position a and a position b respectively under the action of the magnetic force of the electromagnet 4. Referring to fig. 4, when the cutter head 3 swings to the position b, the cutter head 3 is separated from the working surface of the pattern piece 7, and when the cutter head 3 swings to the position a, the cutter head 3 contacts the working surface of the pattern piece 7, and the cutter head 3 is perpendicular to the working surface of the pattern piece 7, so that the front end of the cutter head 3 is in surface contact with the working surface of the pattern piece 7.

Referring to fig. 4, in this embodiment, when the cutter head 3 swings to the position a, the cutter head 3 is in a horizontal state, and a center line of a swing included angle of the cutter head 3 forms a certain included angle with the horizontal plane. The center line of the electromagnet 4 coincides with the center line of the swinging included angle of the cutter head 3, so that the balance of the magnetic force of the electromagnet 4 driving the cutter head 3 to swing towards two directions is ensured.

Referring to fig. 5, the housing 1 is provided with a plurality of limiting grooves 8 for the movement of the cutter head 3, so as to limit the swing angle of the cutter head 3.

Referring to fig. 2 and 3, a plurality of cutter heads 3 are arranged in the housing 1 in a vertical direction, two permanent magnets 6 are arranged up and down, and the cutter heads 3 swing up and down in a vertical plane.

Claims

1. A needle selector for a jacquard comprises a shell, a plurality of cutter heads and a plurality of corresponding electromagnets, wherein the cutter heads are installed in the shell, the front ends of the cutter heads are used for pressing jacquard sheets of the jacquard, the middle parts of the cutter heads are rotatably installed on the shell through rotating shafts, the rear ends of the cutter heads are close to the end faces of iron cores of the electromagnets, permanent magnets used for acting with the electromagnets are installed at the rear ends of the cutter heads, when the electromagnets are powered with currents in different directions, the cutter heads swing to a position a and a position b respectively under the action of the magnetic force of the electromagnets, the cutter heads contact with the working faces of the jacquard sheets when swinging to the position a, and the cutter heads separate from the working faces of the jacquard sheets when swinging to the position b, and the needle selector is characterized in that: when the cutter head swings to the position a, the cutter head is perpendicular to the working surface of the jacquard sheet, so that the front end of the cutter head is in surface contact with the working surface of the jacquard sheet.

2. The selector for jacquard machine according to claim 1, characterized in that: when the cutter head swings to the position a, the cutter head is in a horizontal state.

3. The selector for jacquard machine according to claim 2, characterized in that: the center line of the included angle formed by swinging the cutter head forms a certain included angle with the horizontal plane, and the center line of the electromagnet is superposed with the center line of the included angle formed by swinging the cutter head.

4. The selector for a jacquard according to claim 1, 2 or 3, characterized in that: the shell is provided with a plurality of limiting grooves for the movement of the cutter head, and the limiting grooves are used for limiting the swing angle of the cutter head.

5. The selector for jacquard machine according to claim 1, 2 or 3, characterized in that: the plurality of cutter heads are arranged in the shell along the vertical direction and swing up and down in the vertical plane.

6. The selector for jacquard machine according to claim 1, 2 or 3, characterized in that: two permanent magnets are arranged at the rear end of the cutter head, and the magnetic poles of the two permanent magnets are arranged oppositely.

7. The selector for jacquard machine according to claim 6, characterized in that: the two permanent magnets are arranged up and down.