CN215800238U

CN215800238U - Knitting needle driving mechanism

Info

Publication number: CN215800238U
Application number: CN202121924784.9U
Authority: CN
Inventors: 王来成
Original assignee: FUJIAN QUANZHOU WELLMADE PRECISION MACHINERY CO LTD
Current assignee: FUJIAN QUANZHOU WELLMADE PRECISION MACHINERY CO LTD
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-02-11
Anticipated expiration: 2031-08-17

Abstract

The utility model relates to the technical field of circular knitting machines, in particular to a knitting needle driving mechanism which comprises a dial, a knitting needle, a cam and a spring, wherein the knitting needle is provided with a needle butt, the cam is provided with a needle outlet track groove, the dial rotates to drive the knitting needle to move, and the knitting needle is guided in the needle outlet track groove through the needle butt to enable the knitting needle to make a needle action; one end of the spring is connected with the knitting needle, the other end of the spring is connected with the dial, the spring has elastic force for pulling the knitting needle to be retracted, the triangle is provided with a guide slope, after the knitting needle finishes the needle withdrawing action, the butt leaves from the needle withdrawing track groove, is retracted under the tension action of the spring and is propped against the guide slope, and the butt slides along the guide slope along with the rotation of the dial, so that the knitting needle finishes the needle withdrawing action. The narrowing of the knitting needle is powered by a spring and is not limited by the maximum slope of the triangular track, so that the rapid narrowing can be realized.

Description

Knitting needle driving mechanism

Technical Field

The utility model relates to the technical field of circular knitting machines, in particular to a knitting needle driving mechanism.

Background

Circular knitting machine, a famous circular weft knitting machine. The circular knitting machine has the advantages of multiple knitting systems, high rotating speed, high yield, fast change of flower shapes, good quality of fabrics, few working procedures and strong adaptability of products, so the circular knitting machine is developed quickly.

The existing circular knitting machine drives a knitting needle to complete the actions of needle withdrawing and needle retracting through a needle withdrawing track groove and a needle retracting track groove which are arranged on a triangle, and the slope of the track groove is not suitable to be too large because the track groove plays a role in guiding the sliding of the butt of the knitting needle, so that the needle withdrawing and the needle retracting of the knitting needle need to rotate a needle cylinder by a large angle;

taking the production of a long-pile fabric as an example, a lower knitting needle needs to pull down a long length of silk thread, the conventional triangle is used for driving the knitting needle, when the lower knitting needle descends to a lower position, a large number of lower knitting needles are arranged on the rear side of the lower knitting needle to hook the silk thread, the resistance of continuously pulling down the silk thread becomes very large, the silk thread cannot be pulled completely, and the silk thread is broken after the maximum tensile force which can be borne by the silk thread is exceeded. (refer to FIG. 1-FIG. 2)

Therefore, the existing knitting needle driving mechanism of the circular knitting machine is difficult to adapt to the production of the overlong long-pile fabric, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a knitting needle driving mechanism capable of realizing quick narrowing.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a needle actuation mechanism characterized by: the knitting needle is provided with a plurality of needles and arranged on the dial, the knitting needles are provided with needle butts, the cams are provided with needle outlet track grooves, the dial rotates to drive the knitting needles to move, and the knitting needles are guided in the needle outlet track grooves through the needle butts to make the knitting needles perform needle actions; one end of the spring is connected with the knitting needle, the other end of the spring is connected with the dial, the spring has an elastic force for pulling the knitting needle to be retracted, the triangle is provided with a guide slope, the guide slope is used for supporting a needle butt, the guide slope is obliquely arranged from outside to inside relative to the rotation direction of the dial, after the knitting needle finishes a needle withdrawing action, the needle butt leaves from the needle withdrawing track groove, is retracted under the tensile force of the spring and is propped against by the guide slope, the needle butt rotates along with the dial, and the needle butt slides along the guide slope to finish a needle withdrawing action.

Further, the triangle still is equipped with the horizontal flat guide face, the guide slope includes slope straight face, arc transition face, guide slope one end is located to the arc transition face, and slope straight face and horizontal flat guide face are connected to arc transition face level and smooth.

Furthermore, the included angle between the inclined straight surface and the narrowing direction of the knitting needle is 10-20 degrees.

Furthermore, the included angle between the inclined straight surface and the narrowing direction of the knitting needle is 14 degrees, 15 degrees or 16 degrees.

Furthermore, the springs are provided with a plurality of groups, and one spring independently correspondingly pulls one knitting needle.

As can be seen from the above description of the present invention, compared with the prior art, the needle retracting mechanism provided by the present invention has the advantages that the needle retracting is powered by the spring, and is not limited by the maximum slope of the triangular track, so that the rapid needle retracting can be realized; the needle butt falls onto the guide slope firstly and is supported and then is guided to slide, so that the impact force of the falling of the needle butt on the triangle is reduced, and the problems of needle breakage and needle drop are avoided; the inclined straight slope of the guide slope can be designed to be larger, so that in a circular machine applied to weaving of the ultra-long fluff fabric, the lower knitting needle descends from a high position to a low position and pulls a long section of silk thread under the condition of short transverse displacement, and due to the fact that the transverse displacement of the lower knitting needle is short, only one to two other lower knitting needles on the rear side of the lower knitting needle hook the silk thread, resistance to pulling of the silk thread is not large, the silk thread can slide relative to the hooking positions of the upper knitting needles and the lower knitting needle and is pulled downwards, and the situation that the silk thread is excessively tightened and broken is avoided.

Drawings

Fig. 1 is a schematic diagram of a driving structure of a conventional circular knitting machine in the background art.

Fig. 2 is a schematic view of the trajectory through which the butt passes by the cam in fig. 1.

Fig. 3 is a schematic structural view of a knitting needle driving mechanism of the present invention.

Fig. 4 is a schematic view showing the trajectory of the butt of fig. 3 passed by the cam according to the present invention.

Fig. 5 is a schematic structural view of a knitting needle driving mechanism applied to a circular knitting machine.

Fig. 6 is a schematic view of the structure of the lower needle and the spring of the present invention.

The labels in the figure correspond to the following: 1. the knitting machine comprises an upper dial, 2. an upper knitting needle, 3. a lower dial, 4. a lower knitting needle, 41. a butt, 5. a triangle, 51. a rising track groove, 52. a guide slope, 521. an inclined straight surface, 522. an arc transition surface, 53. a horizontal guide surface and 6. a spring.

Detailed Description

The utility model is further described below by means of specific embodiments.

As shown with reference to fig. 3-6;

taking the knitting needle driving mechanism arranged on a circular machine for producing the ultra-long fluff fabric as an example, the dial in the knitting needle driving mechanism is a lower dial 3, the knitting needle is a lower knitting needle 4, a cam 5 is used for driving the lower knitting needle 4, a spring 6 is connected with the lower knitting needle 4 and the lower dial 3, the needle withdrawing action of the knitting needle is used as the ascending action, and the needle retracting action of the knitting needle is used as the descending action.

A circular knitting machine comprises an upper dial 1, an upper knitting needle 2, a lower dial 3, a lower knitting needle 4, a triangle 5 and a spring 6.

The upper knitting needle 2 is provided with a plurality of needles and is transversely arranged on an upper needle dial 1, the lower knitting needle 4 is provided with a plurality of needles and is vertically arranged on a lower needle dial 3, a cam 5 is used for driving the lower knitting needle 4, a needle butt 41 is arranged on the lower knitting needle 4, an ascending track groove 51 is formed in the cam 5, and the lower knitting needle 4 is guided to slide upwards through the needle butt 41 and leads the lower knitting needle 4 to ascend through the ascending track groove 51.

The springs 6 are provided with a plurality of springs 6, one spring 6 independently corresponds to the lower knitting needle 4, the upper end of the spring 6 is connected with the lower knitting needle 2, the lower end of the spring 6 is fixed at the lower position of the lower dial 2, the spring 6 has elastic force for pulling the lower knitting needle 4 to descend, the cam 5 is provided with a guide slope 52, the upper side face of the guide slope 52 is used for supporting the butt 41, the guide slope 52 is downwards arranged from high to low in the transverse moving direction of the lower knitting needle 4, the lower knitting needle 4 hooks a thread and then is pulled downwards by the spring 6, the butt 41 firstly falls to the high end of the guide slope 52 to be resisted, and then along with the rotation of the lower dial 3, the butt 41 slides downwards along the guide slope 52 under the action of the lower pulling force of the spring 6 to enable the lower knitting needle 4 to descend. The cam 5 is provided with a horizontal guiding surface 53, the guiding slope 52 comprises an inclined straight surface 521 and an arc-shaped transition surface 522, the arc-shaped transition surface 522 is arranged at the lower end of the guiding slope 52, the arc-shaped transition surface 522 smoothly connects the inclined straight surface 521 with the horizontal guiding surface 53, and the butt 41 slides down through the inclined straight surface 521 and then smoothly transitions to the horizontal guiding surface 53 through the arc-shaped transition surface 522. The angle between the inclined straight surface 521 and the vertical surface is 10-20 °, preferably 14 °, 15 °, 16 °.

The working principle of the circular machine refers to the following steps:

step one, with the rotation of the upper dial 1, the silk thread of the silk thread cylinder is hooked by each upper knitting needle 2 and pulled out;

step two, along with the rotation of the lower dial 3, the butt 41 of the lower knitting needle 4 enters the ascending rail groove 51 of the cam 5 and slides upwards along the ascending rail groove 51, so that the lower knitting needle 4 ascends to hook the thread of the upper knitting needle 2;

thirdly, with the rotation of the lower dial 3, the lower knitting needle 4 which hooks the thread is separated from the ascending track groove 51 of the triangle 5 and is pulled downwards under the action of the spring 6, after the lower knitting needle 4 descends for a certain distance, the butt 41 of the lower knitting needle firstly falls to the high-position end of the inclined straight surface 521 of the guide slope 52 to be resisted, at the moment, only a few upper knitting needles 2 hook the thread at the rear section of the hooked position of the thread, so that the resistance of the thread to be pulled downwards is small, the thread can slide relative to the hooked position of the upper knitting needle 2 and is pulled downwards, and the thread is pulled downwards for a certain distance quickly under the condition of small resistance;

step four, along with the rotation of the lower dial 3, the lower knitting needle 4 slides downwards along the inclined straight surface 521 of the guide slope 52 under the action of the pull-down force of the spring 6, and then smoothly moves to the horizontal guide surface 53 through the arc transition surface 522, namely the lower knitting needle 4 keeps a height unchanged state to perform transverse movement after descending to the lowest position, because the spring 6 is used as the power for pulling the lower knitting needle 4, the guide slope 52 plays a supporting role, therefore, the slope of the inclined straight surface 521 of the guide slope 52 can be designed to be larger, and under the condition that the transverse displacement of the lower knitting needle 4 is shorter, the lower knitting needle 4 descends from the high position to the low position and pulls a long length of silk thread.

In the process that the lower knitting needle 4 descends through the guide slope 52, because the transverse displacement of the lower knitting needle 2 is short, only one to two other lower knitting needles 4 on the rear side of the lower knitting needle 4 hook the thread, the resistance to the thread pulling is not large, the thread can slide relative to the hooking positions of the upper knitting needles 2 and the lower knitting needles 4 and can be pulled down, and the situation that the thread is excessively tightened and broken is avoided.

The guide ramp 52 is provided for: because the lower knitting needle 4 is pulled down for a long distance, the spring is pulled down to make the lower knitting needle 4 do the accelerated descending action, if the guide slope 52 is not arranged, the butt 41 will impact on the flat guide surface 53 of the cam 5 at a high speed when the lower knitting needle 4 descends to the lowest position, the butt 41 is easily damaged by high impact force, and the needle drop can happen; when the guiding slope 52 is provided, the needle butt 41 firstly falls to the high-position end of the inclined straight surface 521 of the guiding slope 52 to be abutted against, at this time, the descending speed of the lower knitting needle 4 is not large, the impact force of the needle butt 41 is small and within a bearable range, and then the needle butt 41 is guided to slide downwards through the guiding slope 52, so that the needle butt 41 can be in smooth transition, the slope of the inclined straight surface 521 is large, and the lower knitting needle 4 can also reach the lowest position in a short time.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.

Claims

1. A needle actuation mechanism characterized by: the knitting needle is provided with a plurality of needles and arranged on the dial, the knitting needles are provided with needle butts, the cams are provided with needle outlet track grooves, the dial rotates to drive the knitting needles to move, and the knitting needles are guided in the needle outlet track grooves through the needle butts to make the knitting needles perform needle actions; one end of the spring is connected with the knitting needle, the other end of the spring is connected with the dial, the spring has an elastic force for pulling the knitting needle to be retracted, the triangle is provided with a guide slope, the guide slope is used for supporting a needle butt, the guide slope is obliquely arranged from outside to inside relative to the rotation direction of the dial, after the knitting needle finishes a needle withdrawing action, the needle butt leaves from the needle withdrawing track groove, is retracted under the tensile force of the spring and is propped against by the guide slope, the needle butt rotates along with the dial, and the needle butt slides along the guide slope to finish a needle withdrawing action.

2. A needle actuation mechanism as claimed in claim 1, characterized in that: the triangle still is equipped with the horizontal flat guide face, the guide slope includes slope straight face, arc transition face, guide slope one end is located to the arc transition face, and slope straight face and horizontal flat guide face are connected to arc transition face level and smooth.

3. A needle actuation mechanism as claimed in claim 2, characterized in that: the included angle between the inclined straight surface and the narrowing direction of the knitting needle is 10-20 degrees.

4. A needle actuation mechanism as claimed in claim 3, characterized in that: the included angle between the inclined straight surface and the narrowing direction of the knitting needle is 14 degrees, 15 degrees or 16 degrees.

5. A needle actuation mechanism as claimed in claim 1, characterized in that: the springs are provided with a plurality of groups, and one spring independently and correspondingly pulls one knitting needle.