阅读说明：本技术 一种倍捻合股机主轴传动装置 (Main shaft transmission device of double-twisting stranding machine ) 是由 李炜 赵亮亮 应琛波 俞建军 沈雷 于 2020-06-28 设计创作，主要内容包括：本发明提供一种倍捻合股机主轴传动装置,涉及捻股机技术领域,包括中空的外主轴和内芯轴,内芯轴套装在外主轴内部；外主轴上滚动安装有双联带轮组,外主轴固定安装有旋转轴承座,旋转轴承座上安装有第一变速带轮组和第二变速带轮组,第二变速带轮组穿过外主轴连接内芯轴；双联带轮组连接第一变速带轮组和换向齿轮箱。本发明的内芯轴设置在外主轴内部,大大缩短了轴向尺寸,精简了机构,同时使内芯轴与外主轴的整体刚性更加稳定；通过设置双联带轮组、换向齿轮箱、第一变速带轮组和第二变速带轮组,将反向动力传递至内芯轴,从而实现小飞轮盘和大飞轮盘的正反向等速转动；结合新的过线方式,实现多倍捻距的目的,成倍提高了捻制效率。(The invention provides a main shaft transmission device of a double-twisting stranding machine, which relates to the technical field of stranding machines and comprises a hollow outer main shaft and an inner core shaft, wherein the inner core shaft is sleeved in the outer main shaft; the outer main shaft is provided with a duplex belt wheel set in a rolling manner, the outer main shaft is fixedly provided with a rotary bearing seat, the rotary bearing seat is provided with a first variable speed belt wheel set and a second variable speed belt wheel set, and the second variable speed belt wheel set penetrates through the outer main shaft and is connected with the inner mandrel; the double belt wheel set is connected with the first variable speed belt wheel set and the reversing gear box. The inner mandrel is arranged inside the outer main shaft, so that the axial size is greatly shortened, the mechanism is simplified, and the integral rigidity of the inner mandrel and the outer main shaft is more stable; reverse power is transmitted to the inner mandrel by arranging the duplex belt pulley set, the reversing gear box, the first speed-changing belt pulley set and the second speed-changing belt pulley set, so that forward and reverse constant-speed rotation of the small flywheel disc and the large flywheel disc is realized; the purpose of multiple twisting pitches is realized by combining a new threading mode, and the twisting efficiency is improved in multiple.)

1. A main shaft transmission device of a double twisting machine, characterized in that the main shaft transmission device (40,41) comprises: a hollow outer main shaft (1) and an inner core shaft (2); the inner core shaft (2) is sleeved inside the outer main shaft (1), and one end of the inner core shaft extends out of the outer main shaft (1) and is connected with a small flywheel disc (3); one end of the outer main shaft (1) close to the small flywheel disc (3) is connected with a large flywheel disc (4);

an outer main shaft wire passing hole (5) is obliquely and penetratingly arranged in the outer main shaft (1), and an inner core shaft wire passing hole (6) is coaxially and penetratingly arranged in the inner core shaft (2); the end part of the outer main shaft (1) is provided with an auxiliary thread passing wheel (14) corresponding to the outer main shaft thread passing hole (5) and the inner mandrel thread passing hole (6);

a duplex belt wheel set (7) is arranged on the outer circumferential surface of the outer main shaft (1) in a rolling mode, a rotary bearing seat (8) is fixedly arranged on one side of the duplex belt wheel set (7) of the outer main shaft (1), a first speed changing belt wheel set (9) and a second speed changing belt wheel set (10) which are eccentrically arranged are arranged on the rotary bearing seat (8), and the second speed changing belt wheel set (10) penetrates through the outer main shaft (1) and is connected with the inner mandrel (2); a duplex small belt wheel (11) of the duplex belt wheel set (7) is connected with the first variable speed belt wheel set (9), and a duplex large belt wheel (12) of the duplex belt wheel set (7) is connected with a reversing gear box (13); the outer spindle (1) and the inner spindle (2) rotate forward and backward at the same speed.

2. The main shaft transmission device of the double-twisting machine according to claim 1, wherein the small flywheel disc (3) is provided with an arc-shaped small bow belt (22), and the large flywheel disc (4) is provided with an arc-shaped large bow belt (23); the reversing gear box (13) realizes direction change through a pair of gears meshed with each other.

3. A double twist stranding machine spindle drive according to claim 1, characterised in that the double pulley set (7) is rotatably mounted on the outer spindle (1) by means of rolling bodies, the outer spindle (1) is fitted onto the inner spindle (2) by means of rolling bodies on both sides, a positioning guide (15) is rotatably mounted on the outside of the outer spindle (1) by means of rolling bodies, and the positioning guide (15) and the reversing gearbox (13) are fixed on an external machine tool support (24).

4. A main shaft transmission device of a double twisting machine as claimed in claim 1, wherein the large flywheel disc (4) is provided with a first wire passing wheel (33), and the small flywheel disc (3) is provided with a second wire passing wheel (34); the inner spindle (2) is provided with an inner spindle wire passing wheel (35) on one side of the inner spindle wire passing hole (6), and the outer spindle (1) is provided with an outer spindle wire passing wheel (36) corresponding to the outer spindle wire passing hole (5) and the first wire passing wheel (33).

5. A main shaft transmission device of doubling twisting machine as claimed in claim 1, wherein an eccentric speed-changing transmission shaft (16) is arranged on the rotary bearing seat (8) in a penetrating manner, a speed-changing driving pulley (17) of the first speed-changing pulley set (9) is arranged at one end of the speed-changing transmission shaft (16), and a speed-changing driven pulley (18) of the second speed-changing pulley set (10) is arranged at the other end of the speed-changing transmission shaft (16); the variable-speed driving belt wheel (17) is connected with the duplex small belt wheel (11) through a first synchronous belt (19), and the variable-speed driven belt wheel (18) is connected with an inner mandrel belt wheel (21) at one end of the inner mandrel (2) through a second synchronous belt (20).

6. A main shaft transmission device for a double twisting machine according to claim 5, wherein an avoiding groove (25) for avoiding said second timing belt (20) is provided at one end of said outer main shaft (1).

7. A main shaft transmission device of a doubling winder as claimed in claim 1, wherein an outer main shaft transmission belt pulley (26) is mounted at the end of the outer main shaft (1), and the outer main shaft transmission belt pulley (26) is connected with a central transmission belt pulley (29) of a central transmission shaft (28) through a third synchronous belt (27); the duplex large belt wheel (12) is connected with an output belt wheel (31) of an output shaft of the reversing gear box (13) through a fourth synchronous belt (30), and the reversing gear box (13) is connected with the central transmission shaft (28) through a belt wheel mechanism; the central transmission shaft (28) is connected with a servo motor (32).

8. A two-for-one twisting machine spindle drive as claimed in claim 7, wherein the central drive shaft (28) is provided at its end with an encoder (37).

9. A main shaft transmission for doubled stranding machines according to claim 7 characterised in that the input shaft of the reversing gearbox (13) is fitted with a first reversing gear (38) and its output shaft is fitted with a second reversing gear (39) meshing with the first gear (38).

10. A double twist bunching machine main shaft transmission device as claimed in claim 1, wherein the duplex small belt pulley (11) is connected with the duplex large belt pulley (12) into a whole through a bolt connection.

Technical Field

The invention relates to the technical field of stranding machines, in particular to a main shaft transmission device of a double-stranding machine.

Background

The steel wire twisting product is produced by rotating a plurality of monofilaments through twisting equipment. The method for controlling the lay length of the former steel wire stranding machine adopts a proportioning driving wheel and a driven wheel of a mechanical reduction gearbox to adjust a gear reduction ratio and change the speed of a traction wheel so as to control the lay length of a steel wire strand. In addition, the gear reduction box needs to be maintained regularly, engine oil in the gear reduction box needs to be replaced, and if the sealing performance of the gear reduction box is not in place, the situation of engine oil leakage can be caused. Besides engine oil, the bearings need to be replaced regularly, and the bearings are prevented from being seriously worn to cause seizure.

The flywheel disc plays a role of stranding in a machine tool, namely, a plurality of strands of steel wires are twisted together like a rice twisting rope to form a metal rope. Generally, the running speed of a steel wire stranding machine refers to the speed of a flywheel disc, the higher the speed of the flywheel disc is, the higher the production efficiency of a machine tool is, and the highest running speed is usually set under the condition that the overall performance of the machine tool can bear.

The existing traditional method generally adopts a single twisting machine and a double twisting machine to produce steel wire twisted products, and the production efficiency is limited to a certain extent, so that a four-fold stranding device can be developed, constant-speed forward and reverse rotation motion of two flywheel discs is realized through forward and reverse rotation of an inner main shaft and an outer main shaft, and the purpose of multi-fold stranding of steel wires is achieved.

Disclosure of Invention

Technical problem to be solved

The invention aims to solve the technical problem of providing a main shaft transmission device of a double-twisting stranding machine, which has a compact integral structure.

(II) technical scheme

In order to solve the above technical problem, the present invention provides a main shaft transmission device of a double twisting machine, including: the hollow outer main shaft and the hollow inner core shaft rotate forward and backward at the same speed; the inner core shaft is sleeved in the outer main shaft, and one end of the inner core shaft extends out of the outer main shaft and is connected with a small flywheel disc; one end of the outer main shaft, which is close to the small flywheel disc, is connected with a large flywheel disc; a duplex belt wheel set is arranged on the outer circumferential surface of the outer main shaft in a rolling manner, a rotary bearing seat is fixedly arranged on one side of the duplex belt wheel set of the outer main shaft, a first speed changing belt wheel set and a second speed changing belt wheel set which are eccentrically arranged are arranged on the rotary bearing seat, and the second speed changing belt wheel set penetrates through the outer main shaft and is connected with the inner mandrel; the small duplex belt pulley of the duplex belt pulley set is connected with the first variable speed belt pulley set, and the large duplex belt pulley of the duplex belt pulley set is connected with a reversing gear box.

The inner mandrel is arranged inside the outer spindle, so that the whole space is saved compared with the parallel arrangement, the sizes of the inner mandrel and the outer spindle in the axial direction are shortened, and the structure is simplified; the double belt pulley set is sleeved on the outer main shaft and is connected with the reversing gear box through a double large belt pulley of the double belt pulley set, so that the reversing function is realized; then the power is transmitted to the inner core shaft through the first speed-changing belt pulley set and the second speed-changing belt pulley set, and meanwhile, the outer main shaft and the inner core shaft rotate forward and backward at the same speed through the change of the number of teeth of belt pulleys at all levels.

Further, an arc-shaped small arch belt is arranged on the small flywheel disc, and an arc-shaped large arch belt is arranged on the large flywheel disc; the reversing gear box realizes direction change through a pair of gears meshed with each other. The small arc-shaped bow band and the large arc-shaped bow band are used for threading.

Furthermore, the double belt pulley set is rotatably mounted on the outer spindle through a rolling body, so that the double belt pulley set can independently rotate relative to the outer spindle; the outer spindle is sleeved on the inner mandrel through rolling bodies on two sides, so that the outer spindle and the inner mandrel can rotate relatively and independently; and a positioning guide sleeve is rotatably arranged outside the outer main shaft through a rolling body, and the positioning guide sleeve and the reversing gear box are fixed on an external machine tool bracket.

Further, an outer main shaft wire passing hole is obliquely and penetratingly arranged in the outer main shaft, and an inner core shaft wire passing hole is coaxially and penetratingly arranged in the inner core shaft; the end part of the outer main shaft is provided with an auxiliary wire passing wheel corresponding to the wire passing hole of the outer main shaft and the wire passing hole of the inner core shaft; the large flywheel disc is provided with a first wire passing wheel, and the small flywheel disc is provided with a second wire passing wheel; the inner spindle is provided with an inner spindle wire passing wheel on one side of the inner spindle wire passing hole, and the outer spindle is provided with an outer spindle wire passing wheel corresponding to the outer spindle wire passing hole and the first wire passing wheel.

Furthermore, an eccentric variable-speed transmission shaft penetrates through the rotary bearing seat, a variable-speed driving belt wheel of the first variable-speed belt wheel set is installed at one end of the variable-speed transmission shaft, and a variable-speed driven belt wheel of the second variable-speed belt wheel set is installed at the other end of the variable-speed transmission shaft; the variable-speed driving belt wheel is connected with the duplex small belt wheel through a first synchronous belt, and the variable-speed driven belt wheel is connected with an inner mandrel belt wheel at one end of the inner mandrel through a second synchronous belt.

Furthermore, an avoiding groove for avoiding the second synchronous belt is formed in one end of the outer main shaft.

Further, an outer spindle driving belt wheel is mounted at the end part of the outer spindle, and the outer spindle driving belt wheel is connected with a central driving belt wheel of the central driving shaft through a third synchronous belt; the double-connection large belt wheel is connected with an output belt wheel of an output shaft of the reversing gear box through a fourth synchronous belt, and the reversing gear box is connected with the central transmission shaft through a belt wheel mechanism; the central transmission shaft is connected with a servo motor.

Further, an encoder is arranged at the end part of the central transmission shaft.

Furthermore, an input shaft of the reversing gear box is provided with a first reversing gear, and an output shaft of the reversing gear box is provided with a second reversing gear meshed with the first gear; through the meshing of the first reversing gear and the second reversing gear, the rotating directions of the input shaft and the output shaft are opposite, a primary reversing function is realized, and power after reversing is transmitted to the inner core shaft by combining two variable speed belt wheel sets.

Further, the duplex small belt wheel is connected with the duplex large belt wheel into a whole through a bolt.

(III) advantageous effects

Compared with the prior art, the main shaft transmission device of the double-twisting stranding machine has the following advantages:

1) the inner core shaft is arranged inside the outer main shaft, so that the size in the axial direction is greatly shortened, the mechanism is simplified, and the integral rigidity of the inner core shaft and the outer main shaft is more stable;

2) the outer main shaft is sleeved with a duplex belt pulley group which can independently rotate relative to the outer main shaft, the duplex belt pulley group is respectively connected with a reversing gear box and a first variable speed belt pulley group, reverse power after reversing of the reversing gear box is transmitted to the duplex belt pulley group, and then the duplex belt pulley group is connected with an inner mandrel belt pulley of an inner mandrel through a second variable speed belt pulley group to transmit the reverse power to the inner mandrel; thereby realizing the forward and reverse rotation of the small flywheel disc and the large flywheel disc;

3) the constant-speed rotation of the outer main shaft and the inner core shaft is realized through the matching of the number of teeth of belt pulleys at each stage, such as a double-coupling belt pulley set, a variable-speed driving belt pulley, a variable-speed driven belt pulley and the like; thereby realizing the forward and reverse constant-speed rotation of the small flywheel disc and the large flywheel disc;

4) the novel wire passing mode is formed by matching the small arc-shaped bow belt, the large arc-shaped bow belt, the wire passing wheels and the wire passing holes, the purpose of multiple times of twisting pitches is achieved by combining forward and reverse rotation of the inner core shaft and the outer main shaft at the same speed, and twisting efficiency is improved in multiple times.

Drawings

FIG. 1 is a schematic structural diagram of a main shaft transmission device of a double twisting machine according to the present invention;

FIG. 2 is a schematic structural view of a dual pulley set of the main shaft transmission device of the double twisting machine of the present invention;

FIG. 3 is a perspective view of the main shaft transmission device of the double twisting machine of the present invention;

FIG. 4 is a perspective view of a small flywheel plate and a large flywheel plate of the main shaft transmission device of the double stranding machine of the present invention;

FIG. 5 is a perspective view of a reversing gear box portion of the main shaft transmission device of the double twisting machine of the present invention;

FIG. 6 is a schematic structural view of the double twist stranding machine main shaft transmission device after threading the left main shaft transmission device;

FIG. 7 is a schematic structural view of the double twist stranding machine spindle transmission after threading the right spindle transmission;

wherein: 1 is an outer main shaft, 2 is an inner mandrel, 3 is a small flywheel disc, 4 is a large flywheel disc, 5 is an outer main shaft thread passing hole, 6 is an inner mandrel thread passing hole, 7 is a duplex belt wheel set, 8 is a rotary bearing seat, 9 is a first speed changing belt wheel set, 10 is a second speed changing belt wheel set, 11 is a duplex small belt wheel, 12 is a duplex large belt wheel, 13 is a reversing gear box, 14 is an auxiliary thread passing wheel, 15 is a positioning guide sleeve, 16 is a speed changing transmission shaft, 17 is a speed changing driving belt wheel, 18 is a speed changing driven belt wheel, 19 is a first synchronous belt, 20 is a second synchronous belt, 21 is an inner mandrel belt wheel, 22 is an arc small bow belt, 23 is an arc large bow belt, 24 is a machine tool support, 25 is an avoiding groove, 26 is an outer mandrel transmission belt wheel, 27 is a third synchronous belt, 28 is a central transmission shaft, 29 is a central transmission belt wheel, 30 is a fourth synchronous belt, 31 is an output belt wheel, 32 is a servo motor, 33 is a first thread passing wheel, A second wire passing wheel 34, an inner core wire passing wheel 35, an outer main shaft wire passing wheel 36, an encoder 37, a first reversing gear 38, a second reversing gear 39, a left main shaft transmission device 40 and a right main shaft transmission device 41.

Detailed Description

Referring to fig. 1 to 7, the present invention provides a main shaft transmission device of a double twisting and stranding machine, including: a hollow outer main shaft 1 and an inner core shaft 2; the inner core shaft 2 is sleeved inside the outer main shaft 1, and one end of the inner core shaft extends out of the outer main shaft 1 and is connected with a small flywheel disc 3; one end of the outer main shaft 1 close to the small flywheel disc 3 is connected with a large flywheel disc 4; the small flywheel disc 3 and the large flywheel disc 4 are used for stranding. The outer circumference of the outer main shaft 1 is provided with a duplex belt pulley group 7 in a rolling way, one side of the duplex belt pulley group 7 of the outer main shaft 1 is fixedly provided with a rotary bearing seat 8, the rotary bearing seat 8 is provided with a first variable speed belt pulley group 9 and a second variable speed belt pulley group 10 which are eccentrically arranged, and the second variable speed belt pulley group 10 penetrates through the outer main shaft 1 and is connected with the inner mandrel 2; the duplex small belt wheel 11 of the duplex belt wheel set 7 is connected with the first variable speed belt wheel set 9, and the duplex large belt wheel 12 of the duplex belt wheel set 7 is connected with the reversing gear box 13.

Referring to fig. 1, the inner spindle is installed inside the outer spindle in this embodiment, which saves more overall space than the parallel arrangement, shortens the size of the inner spindle and the outer spindle in the axial direction, and simplifies the overall structure; the double-coupling belt pulley group 7 is sleeved on the outer main shaft and is connected with the reversing gear box 13 through a double-coupling large belt pulley 12 of the double-coupling belt pulley group 7, so that the function of power reversing is realized; then the power at the position of the duplex big belt wheel 12 is transmitted to the inner mandrel 2 through the first variable speed belt wheel group 9 and the second variable speed belt wheel group 10, and meanwhile, the outer main shaft and the inner mandrel rotate positively and negatively at the same speed through the matching change of the number of teeth of the belt wheels at each stage.

Referring to fig. 1, the dual pulley set 7 is rotatably mounted on the outer spindle 1 through a rolling element, so that the dual pulley set 7 can independently rotate relative to the outer spindle 1; the outer spindle 1 is sleeved on the inner mandrel 2 through rolling bodies on two sides, so that the outer spindle 1 and the inner mandrel 2 can rotate relatively and independently; a positioning guide sleeve 15 is rotatably arranged outside the outer main shaft 1 through a rolling body, and the positioning guide sleeve 15 and the reversing gear box 13 are fixed on an external machine tool support 24.

Referring to fig. 3 and 4, the small flywheel panel 3 is provided with an arc-shaped small bow band 22, and the large flywheel panel 4 is provided with an arc-shaped large bow band 23; the reversing gear box 13 achieves direction change through a pair of gears meshed with each other. The small arc-shaped bow belt 22 and the large arc-shaped bow belt 23 are used for wire passing.

Referring to fig. 1 and 2, an outer main shaft wire passing hole 5 is obliquely arranged in the outer main shaft 1 in a penetrating manner, and an inner core shaft wire passing hole 6 is coaxially arranged in the inner core shaft 2 in a penetrating manner; the end part of the outer main shaft 1 is provided with an auxiliary wire passing wheel 14 corresponding to the outer main shaft wire passing hole 5 and the inner core shaft wire passing hole 6; the large flywheel panel 4 is provided with a first wire passing wheel 33, and the small flywheel panel 3 is provided with a second wire passing wheel 34; the inner mandrel 2 is provided with an inner mandrel thread passing wheel 35 at one side of the inner mandrel thread passing hole 6, and the outer main shaft 1 is provided with an outer main shaft thread passing wheel 36 corresponding to the outer main shaft thread passing hole 5 and the first thread passing wheel 33. An eccentric speed change transmission shaft 16 penetrates through the rotary bearing seat 8, a speed change driving belt wheel 17 of the first speed change belt wheel set 9 is arranged at one end of the speed change transmission shaft 16, and a speed change driven belt wheel 18 of the second speed change belt wheel set 10 is arranged at the other end of the speed change transmission shaft 16; the variable speed driving pulley 17 is connected with the duplex small pulley 11 through a first synchronous belt 19, and the variable speed driven pulley 18 is connected with an inner mandrel pulley 21 at one end of the inner mandrel 2 through a second synchronous belt 20.

The spindle transmission device of the present embodiment is symmetrically installed on the machine tool bracket 24, referring to fig. 6 and 7, the spindle transmission device is specifically a left spindle transmission device 40 and a right spindle transmission device 41, and a cradle reeling and unreeling device is installed between the two spindle transmission devices.

With reference to fig. 6 and 7, the winding method is as follows: the steel wire at the cradle take-up and pay-off device sequentially winds through the inner core shaft wire passing hole 6, the inner core shaft wire passing wheel 35 and the second wire passing wheel 34 of the left main shaft transmission device 40, winds to the right main shaft transmission device 41 through the arc-shaped small bow band 22, passes through the second wire passing wheel 34 and the inner core shaft wire passing wheel 35 of the right main shaft transmission device 41, then penetrates through the inner core shaft wire passing hole 6, enters the outer main shaft wire passing hole 5 through the auxiliary wire passing wheel 14, winds back to the left main shaft transmission device 40 through the outer main shaft wire passing wheel 36, the first wire passing wheel 33 and the arc-shaped large bow band 23, enters the outer main shaft wire passing hole 5 through the first wire passing wheel 33 and the outer main shaft wire passing wheel 36 of the left main shaft transmission device 40, and finally winds out to an external traction wheel device and a take. Fig. 6 and 7 provide a wiring diagram of internal and external take-up (cradle take-up and pay-off device pay-off, external traction wheel and take-up and pay-off device take-up), and the spindle transmission device of the embodiment is also applicable to the wiring form of internal and external take-up and pay-off.

Referring to fig. 1, an escape groove 25 for escaping the second timing belt 20 is provided at one end of the outer spindle 1.

Referring to fig. 3, an outer spindle driving pulley 26 is installed at the end of the outer spindle 1, and the outer spindle driving pulley 26 is connected to a central driving pulley 29 of a central driving shaft 28 through a third synchronous belt 27; the duplex big belt wheel 12 is connected with an output belt wheel 31 of an output shaft of the reversing gear box 13 through a fourth synchronous belt 30, and the reversing gear box 13 is connected with the central transmission shaft 28 through a belt wheel mechanism; the central transmission shaft 28 is connected with a servo motor 32 through a belt wheel mechanism; the central drive shaft 28 is provided with an encoder 37 at its end.

Referring to fig. 3 and 5, the input shaft of the reversing gear box 13 is provided with a first reversing gear 38, and the output shaft thereof is provided with a second reversing gear 39 engaged with the first gear 38; through the meshing of the first reversing gear 38 and the second reversing gear 39, the rotation directions of the input shaft and the output shaft are opposite, a primary reversing function is realized, and power after reversing is transmitted to the inner mandrel 2 by combining two speed changing belt wheel sets.

The duplex small belt wheel 11 is connected with the duplex large belt wheel 12 into a whole through bolt connection, and can also be realized in an integrated forming mode and the like.

The inner mandrel is arranged inside the outer main shaft, so that the sizes of the inner mandrel and the outer main shaft in the axial direction are greatly shortened, and the mechanism is simplified; reverse power is transmitted to the inner mandrel by arranging the duplex belt pulley set, the reversing gear box, the first speed-changing belt pulley set and the second speed-changing belt pulley set, so that the forward and reverse rotation of the small flywheel disc and the large flywheel disc is realized; the constant-speed rotation of the outer main shaft and the inner mandrel is realized through the matching of the tooth number of belt wheels at each stage; thereby realizing the forward and reverse constant-speed rotation of the small flywheel disc and the large flywheel disc; through the collocation of the small arc-shaped bow belt, the large arc-shaped bow belt, each wire passing wheel and each wire passing hole, a new wire passing mode is formed, the forward and reverse rotation at the same speed of the inner core shaft and the outer main shaft is combined, the purpose of multiple times of twisting distance is realized, and the twisting efficiency is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.