CN108823701A - A kind of the apron drive method and biserial apron mechanism of drafting assembly of spinning frame - Google Patents

Abstract

A method for driving an apron on a drafting device of a spinning frame. The drafting device includes a double-row apron mechanism, and the double-row apron mechanism corresponds to each spinning position, and includes short upper and lower apron pairs and The upper and lower aprons are paired with two pairs of aprons, and the working outer circle of the drafting part of the front middle roller has two coaxial rollers whose rotary motion is relatively independently controlled, and the rotary motion of one of the rollers is the front middle roller The rotation of itself and the rotation of the other roller are driven by the rear middle roller. The rotation of the rear middle roller drives the rear middle and upper rollers, and also drives the rollers at the contact part of the front middle roller and the long lower apron in the front The upper middle roller rotates around the axis, and the upper and lower aprons pass through the nip of the front middle roller. Active rotation of the roller is used to reduce the movement resistance of the upper and lower aprons to the nip of the front middle roller and keep the long The tension of the upper and lower aprons is stable before and after the nip of the front middle roller, and the long upper and lower apron pairs are in a mutual bonding state from the nip of the rear middle roller to the front ends of the upper and lower rollers, forming an elastic clamping of the fiber strips .

Description

Apron-driving method and double-row apron mechanism for drafting device of spinning frame

technical field

The invention relates to a spinning frame drafting device, in particular to an apron driving method and a double row apron mechanism of the spinning frame drafting device.

Background technique

In the patent 201710327732.5 "A double-row apron yarn guiding device for spinning frame and its ring spinning frame and spinning method", a double-row apron mechanism is proposed. This technology is aimed at the roller clamp in the double-row apron mechanism. A new roller nip structure is proposed, that is, the upper and lower rollers of the middle roller nip corresponding to the long apron pair adopt freely rotatable rollers and sleeves, so that the long apron pair is clamped by the middle roller nip In the state of the middle roller, it is not controlled by the nip of the middle roller, and slides over the nip of the middle roller to ensure that the depth of the drafting zone of the two fiber strips on the left and right is consistent. After practice, it has been proved that this is a good idea, but it is There are also defects in the method. In the double-row apron drafting device, the long apron itself is long in length and small in width. It is installed according to the installation structure method of the prior art on the spinning frame, and elastic elongation is easily produced after being stressed. The lower apron is particularly serious. When the phenomenon of elastic elongation occurs, a gap is formed between the upper and lower aprons. The two cannot form elastic contact, and the fiber strips cannot be controlled. At the same time, with the generation of elastic elongation of the long lower apron, The frictional resistance between the long apron and the enveloping angle of the lower apron increases, causing the lower apron to break, and when the middle roller clamps the long apron, it will intensify the friction between the front middle roller and the rear middle roller. This phenomenon will cause the deterioration of the spinning running state.

Contents of the invention

One object of the present invention is to propose a method for driving the apron of the drafting device of the spinning frame in view of the defects existing in the drafting device technology of the existing double-row apron mechanism.

Another object of the present invention is to realize a method for driving the aprons of the drafting device of the spinning frame, and propose a double-row apron mechanism.

In order to achieve the above-mentioned purpose of the invention, the technical scheme that the present invention takes is as follows:

A method for driving an apron on a drafting device of a spinning frame. The drafting device includes a double-row apron mechanism, and the double-row apron mechanism corresponds to each spinning position, and includes a pair of short upper and lower aprons. There are two pairs of long upper and lower aprons, the short upper and lower apron pairs are driven by the front middle roller, the long upper and lower apron pairs are driven by the rear middle roller, and the front middle roller of each spinning position pulls The extension part is two parallel and coaxial rollers. The rotary motion of these two rollers is independently controlled. The rotary motion of one roller is the rotation of the front middle roller itself, and the rotary motion of the other roller is driven by the rear middle roller. Yes, the rotation of the rear middle roller drives the long upper and lower apron pairs and the rear middle upper roller, and at the same time drives the roller at the contact position between the upper front middle roller and the long lower apron to rotate around the axis on the front middle roller, or The rotary movement of the other roller is driven by the servo motor through the transmission mechanism. The long upper and lower apron pairs are driven by the rear middle roller and the active rotation of the roller at the nip of the front middle roller, and pass through the nip of the front middle roller. , when the upper and lower apron pairs pass through the jaws of the front middle roller, the active rotation of the rollers is used to prevent the upper and lower apron pairs from being hindered when they pass through the jaws of the front middle roller, and to keep the pair of upper and lower aprons The front and rear tension of the front middle roller nip is stable, and the long upper and lower apron pairs are in a mutual bonding state from the rear middle roller nipper to the front end of the upper and lower rollers, forming an elastic clamping of the fiber strip.

A double-row apron mechanism, the double-row apron mechanism is a part of the drafting device of the spinning frame, the double-row apron mechanism includes: front middle roller, rear middle roller, front middle top roller, rear middle top roller, short bottom sheath apron, long lower apron, short upper apron, long upper apron, lower apron, upper apron, guide roller, short lower apron tension frame, long lower apron tension frame, looper roller transmission mechanism, the front middle upper The structure of the roller is a coaxial roller structure or a stepped roller structure. The structure of the rear middle upper roller is a cylindrical structure or a cylindrical structure with a concave diameter in the middle. The short lower apron is set between the front middle roller and the middle roller. On the lower roller, the long lower apron is put on the front middle roller and the guide roller, and is set on the rear middle roller and the lower roller. On each spinning position, the short lower apron and the short upper apron, the long lower apron and the long upper apron The aprons form two pairs of aprons, the short upper and lower apron pairs and the long upper and lower apron pairs are arranged side by side, the short upper and lower apron pairs are driven by the front middle roller, and the long upper and lower apron pairs are driven by the rear middle roller , the front middle roller includes a looper roller relative to the front middle roller. On each spindle position, the looper roller and the working outer circle of the front middle roller are juxtaposed in pairs, and the diameter of the outer circle of the two forming the jaws is the same , can form the nip of the front middle roller together with the front middle upper roller of the coaxial roller structure. The looper roller on the front middle roller is driven by the rear middle roller through the roller transmission belt or by the servo motor through the transmission mechanism. The lower apron moves around the actively rotating rear middle roller and the active rotating looper roller on the front middle roller, and the jaw formed by the looper roller and the front middle upper roller actively pulls the long upper and lower apron pairs through the front middle roller The jaws ensure that the long upper and lower aprons separated by the jaws of the front middle roller are stable in tension to the aprons before and after the jaws of the front middle roller, forming an effective elastic clamping of the fiber strip.

Further, the front middle top roller can be distinguished according to the fiber length of the draft fiber sliver, and its structural form is a stepped roller structure or a coaxial roller structure. The front middle top roller of the coaxial roller structure, each spindle The outer circle diameters of the two front, middle and top roller bodies juxtaposed on the position are identical.

Further, the outer circle of the rear middle top roller is cylindrical, the rear middle bottom roller and the rear middle top roller form a clamping jaw, or the outer circle of the rear middle top roller is a concave cylindrical shape, The rear middle bottom roller and the rear middle top roller form a slippery nip, which is suitable for drafting of long fibers.

Further, the guide roller is a freely rotatable roller shaft, and the position of the guide roller is to keep the enveloping angle of the long lower apron on the lower shaft equal to or similar to the enclosing angle of the short lower apron on the lower shaft, so that The contact of the roller with the long lower apron is a rolling contact.

Further, the contact between the long lower apron tension frame and the long lower apron is rolling contact.

Beneficial effects of the present invention:

The invention discloses an apron-driving method and a double-row apron mechanism for the drafting device of a spinning frame. The roller cover set on the front middle roller rotates automatically. When the jaws of the front middle roller clamp the long apron pair driven by the rear middle roller, it can actively guide the long apron pair to pass through the jaws of the front middle roller, thereby ensuring the long leather During the rotation process of the ring pair, its elastic elongation and deformation are reduced, which can effectively elastically clamp the fiber strip, and solve the key defect of the innovative technology.

Description of drawings

Fig. 1 is the schematic diagram of a kind of double row apron mechanism of the present invention;

Fig. 2 is a schematic diagram of a spinning frame drafting device with a double row apron mechanism of the present invention;

Fig. 3 is the schematic diagram that the rear roller of the present invention drives the movable roller to rotate;

Fig. 4 is the schematic diagram that front middle top roller and front middle roller of coaxial roller structure of the present invention form jaw;

Fig. 5 is the schematic diagram that the front middle top roller and the front middle roller of the stepped roller structure of the present invention form the jaw;

Fig. 6 is the schematic diagram of the rear middle top roller and the rear middle roller of the present invention with a concave cylindrical structure of unequal diameters forming a jaw;

Fig. 7 is the schematic diagram that the rear middle upper roller and the rear middle roller of the present invention form the jaw;

Fig. 8 is another schematic structural view of the spinning frame drafting device with a double-row apron mechanism of the present invention;

Detailed ways

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. The embodiments of the present invention are only for illustrating specific methods, and the scale of the method is not limited by the embodiments. Any modification based on the principle of the present invention with the common knowledge known to those skilled in the art is within the protection scope of the present invention. .

Embodiment one

As shown in Figure 1 and Figure 3, a double-row apron mechanism, the double-row apron mechanism includes: front middle roller 21, looper roller 23, rear middle roller 31, front middle upper roller 22, rear middle upper roller 32 , short lower apron 612, long lower apron 611, short upper apron 622, long upper apron 621, lower apron 51, upper apron 52, guide roller 73, short lower apron tension frame 71, long lower apron tension frame 72 And transmission belt 33, looper roller 23 is set on the front middle roller 21, can rotate relative to front middle roller 21, short lower apron 612, short upper apron 622, long lower apron 611, long upper apron 621 constitute two pairs of side by side The upper and lower apron pairs, the short upper and lower apron pairs are driven by the front middle roller 21, the long upper and lower apron pairs are driven by the rear middle roller 31, and each apron pair guides a fiber strip; as shown in Fig. 2 As shown, the drafting device of the spinning frame includes a double-row apron mechanism, front roller 11, front top roller 12, rear roller 41, and rear top roller 42. The drive of each roller in the drafting device can adopt the traditional wheel train linkage transmission It can also be driven independently by the motor. In the system driven by the motor independently, the servo control system and the computer program programming control method are used to make the speed of each roller in the drafting device variable in stages, so as to realize the feeding amount or draft of the two fiber strips. The segmental dynamic change of the elongation multiple; as shown in Figure 3, the looper roller 23 is looped on the front middle roller 21, and the back middle roller 31 is connected with the looper roller 23 through the transmission belt 33, and when the back middle roller 31 rotates, it drives the looper The roller 23 rotates, and the long lower apron 611 and the long upper apron 621 pass through the surface of the actively rotating looper roller 23, and the transmission belt 33 of the transmission looper roller 23 is a toothed belt or a flat adhesive tape; The structure of the roller 22 is a coaxial roller structure, and each spindle position is juxtaposed with a left front middle upper roller body 222 and a right front middle upper roller body 221. Roller 21 and looper roller 23 together constitute the jaws of the front middle roller. In the double-row apron mechanism, when the rear middle roller 31 rotates, the looper roller 23 also rotates synchronously. The upper and lower aprons are aligned on the front middle roller At the nip, it is guided by the active rotation of the looper roller to pass through the nip of the front middle roller. Compared with the passively rotating roller sleeve in the prior art, the obstruction of the movement of the upper and lower aprons by the nip of the front middle roller is eliminated. , keeping the tension of the long upper and lower apron pairs stable before and after the front middle roller nip, the long upper and lower apron pairs from the rear middle roller nip to the front end of the upper and lower rollers, the whole process is in a mutual bonding state, forming a bond to the fiber strip Elastic grip.

As shown in Figure 1, the guide roller 73 is a freely rotatable circular shaft. Rolling bearings are installed at the two ends of the shaft. Friction, the role of the guide roller 73 is to position the enveloping angle of the long lower apron 611 on the lower Xiao 51, so that it remains equal to or similar to the enclosing angle formed by the short lower apron 612 on the lower Xiao 51, thereby reducing the enveloping angle of the long lower apron 612. Tension due to friction during rotation.

As shown in Figure 5, for fiber strips with hair-like lengths, the structure of the front middle and top rollers adopts a stepped roller shape, and the long upper and lower aprons are not clamped by the jaws of the front middle rollers.

As shown in Figure 6, for the fiber strips of wool-type length, the back middle top roller structure adopts the back top roller with a concave diameter cylindrical structure, and the fiber strip forms slippery drafting at the back middle roller nip.

As shown in Figure 7, the back middle top roller adopts a cylindrical structure with equal diameter, which can form a clamping jaw.

Embodiment two

As shown in Figure 8, the drafting device of the spinning frame includes a double-row apron mechanism and front rollers. The front middle and upper rollers adopt a coaxial roller structure, and the rear middle and upper rollers adopt a cylindrical structure of equal diameter to form a clamping jaw. , the rollers of the drafting device are independently driven by servo motors. Under the programming control of the computer program controller, the speed of each roller can be changed in stages. In the drafting zone between the front middle roller and the front roller, the relative tension difference of the double-row aprons can effectively control the process and ensure uniform drafting.

Claims (6)

1. It include biserial apron mechanism, the biserial in drafting system 1. a kind of apron of drafting assembly of spinning frame drives method Apron mechanism corresponds to each spinning spindle position, comprising short upper and lower apron pair and long upper and lower apron to two pairs of aprons, it is short it is upper, Lower apron drives to by preceding middle roller, and long upper and lower apron drives to by rear middle roller, it is characterized in that before each spinning spindle position Middle roller drafting portion is two rollers arranged side by side and coaxial, and the rotary motion of this two rollers is independent control, wherein one The rotary motion of a roller is the rotation of preceding middle roller itself, and the rotary motion of another roller is driven by rear middle roller, The rotation of middle roller has also driven on preceding middle roller and under length while driving long upper and lower apron pair and rear middle top roller afterwards The roller of apron contact site is rotated about axis on preceding middle roller or the rotary motion of another roller is by servo motor Driven by transmission mechanism, long upper and lower apron under the drive of rear middle roller with the roller at preceding middle roller jaw actively Under rotation guidance, by preceding middle roller jaw, in the upper and lower apron of length to the preceding middle roller jaw of process, using the active of roller Rotation keeps long upper and lower apron in preceding middle roller from the upper and lower apron of length to by being hindered when preceding middle roller jaw Tension stability before and after jaw, to from rear middle roller jaw to upper and lower Xiao Qianduan, whole process is in and is bonded to each other shape long upper and lower apron State constitutes the resilient clamp to ribbon.
2. 2. a kind of biserial apron mechanism, biserial apron mechanism is a part of drafting assembly of spinning frame, and biserial apron mechanism includes： Preceding middle roller, rear middle roller, preceding middle top roller, rear middle top roller, short lower apron, long lower apron, short upper leather ring, long upper leather ring, Lower Xiao, upper Xiao, deflector roll, short lower leather ring tension frame, long lower leather ring tension frame, loop roller transmission mechanism, it is described before in upper sieve Drawing its structure is coaxial laura structure either ladder laura structure, described its structure of rear middle top roller be cylindrical structure or Person is intermediate recessed not equal diameter cylindrical structure, and short hypodermis snare is on preceding middle roller and lower Xiao, long hypodermis snare mistake Preceding middle roller and deflector roll are sleeved on rear middle roller and lower Xiao, on each spinning spindle position, short lower apron and short upper leather ring, length Lower apron and long upper leather ring form two pairs of aprons, and short upper and lower apron pair and long upper and lower apron are to arranged in parallel, short upper and lower apron It is driven to by preceding middle roller, long upper and lower apron drives to by rear middle roller, it is characterized in that the preceding middle roller includes opposite In the loop roller of preceding middle roller, in each spindle position, loop roller and the work outer circle of preceding middle roller are arranged side by side in pairs, the two structure It is identical at the outside diameter of jaw, middle roller jaw, preceding middle sieve before being collectively formed with the preceding middle top roller of coaxial laura structure The loop roller pulled on is either to pass through transmission mechanism band by servo motor by what roller transmission belt drove by rear middle roller Dynamic, long lower apron is that the loop surface of roller actively rotated on the rear middle roller and preceding middle roller of active rotation moves, living It covers the jaw that roller and preceding middle top roller are constituted and actively draws long upper and lower apron to by preceding middle roller jaw, ensureing by preceding The upper and lower apron of length that roller nip separates forms effectively the apron tension stability before and after preceding middle roller jaw to ribbon Resilient clamp.
3. 3. a kind of biserial apron mechanism according to claim 2, it is characterized in that the preceding middle top roller is can be according to leading The difference of ribbon fibre length is stretched, structure type is ladder laura structure either coaxial laura structure, coaxial roller knot The preceding middle top roller of structure, the outside diameter of two preceding middle top roller roll bodies arranged side by side is identical in each of which spindle position.
4. 4. a kind of biserial apron mechanism according to claim 2 or 3, it is characterized in that the outer ring of the rear middle top roller Shape is cylindrical, rear middle bottom roller and rear middle top roller composition clamping jaw, or the outer circular shape of rear middle top roller is recessed Sunken cylinder, rear middle bottom roller and rear middle top roller constitute smooth jaw, to be suitable for long stapled drawing-off.
5. 5. a kind of biserial apron mechanism according to claim 2, it is characterized in that deflector roll is the roll shaft that can freely turn round, The location of deflector roll is to maintain that long lower apron is equal to the angle of contact of lower Xiao to the angle of contact of lower Xiao and short lower apron or phase Approximation, deflector roll are to be in rolling contact with the contact of long lower apron.
6. 6. a kind of biserial apron mechanism according to claim 2, it is characterized in that apron under long lower leather ring tension frame and length Contact is to be in rolling contact.