CN221235735U

CN221235735U - Double needle sewing machine

Info

Publication number: CN221235735U
Application number: CN202322879006.8U
Authority: CN
Inventors: 韦黎刁
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-10-26
Filing date: 2023-10-26
Publication date: 2024-06-28
Anticipated expiration: 2033-10-26

Abstract

The utility model discloses a double-needle sewing machine, which comprises a first sewing needle bar component, a first thread taking-up lever, a first rotating shuttle component, a second sewing needle bar component, a second thread taking-up lever and a second rotating shuttle component; the second sewing needle bar component, the second thread taking-up lever and the second rotating shuttle component can be arranged in a left-right displacement mode so as to adjust the double-needle sewing distance; the thread take-up lever driving shaft, the needle bar driving shaft and the rotating shuttle driving shaft share a driving motor as a driving source, the output end of the driving motor is connected with a rotating shaft, a balance wheel is arranged on the rotating shaft, a swing rod is eccentrically connected to the balance wheel, the swing rod is connected to the needle bar driving shaft to enable the needle bar driving shaft to move up and down along with the swing of the swing rod, and a connecting piece is connected between the swing rod and the thread take-up lever driving shaft to enable the thread take-up lever driving shaft to move up and down along with the swing of the swing rod. On the premise of adjustable double needle spacing, the transmission structure of the thread take-up lever is changed, thereby being beneficial to reducing the operation sound of a sewing machine and improving the sewing speed.

Description

Double needle sewing machine

Technical Field

The present utility model relates to the field of sewing machines, and more particularly to a two-needle sewing machine which may refer to, but is not limited to, a pant earphone.

Background

A double needle sewing machine has two sewing modules for simultaneously completing two sets of sewing thread processing. In actual production, a common double-needle sewing machine is used for sewing color threads with different colors on a fabric so as to obtain a pattern with more vivid, attractive and better vision, compared with a single-needle computer pattern sewing machine, the double-needle sewing machine can simultaneously sew the color threads with two colors, and the sewing stitch of the two color threads is usually smaller in interval. For trousers such as jeans and western-style clothes trousers, a plurality of trousers waist ear belts are generally required to be sewn on the trousers waist, the distance between the upper ends and the lower ends of the trousers waist ear belts is relatively large, and in an early adding mode, one end of the trousers waist ear belts is sewn on the trousers waist, and then the other end of the trousers waist ear belts is sewn on the trousers waist, so that the operation is complicated, the production efficiency is difficult to further improve, and the problem that the consistency of sewing stitches of the upper ends and the lower ends of the trousers waist ear belts is not ideal (such as poor parallelism) is easy to occur.

The following two-needle sewing machine with adjustable distance appears, it is through the modular design with a set of sewing module, and relative needle bar drive shaft, take-up lever drive shaft, rotating shuttle drive shaft can control the displacement, so, the interval of adjusting two-needle sewing module as required, can sewing both ends of the product such as waist of trousers ear area simultaneously, machining efficiency is high, because two-needle sewing module is with the synchronous processing of drive, upper and lower end sewing stitch uniformity of waist of trousers ear area is good, moreover, the interval is adjustable can satisfy the sewing processing demand of different sizes waist of trousers ear area. Specifically, the cam is used for linking the driving shaft of the thread take-up lever to rotate so as to enable the first thread take-up lever and the second thread take-up lever to rotate up and down, the left side of the cam is provided with a cam circumferential surface which is arranged around the rotating shaft, the cam circumferential surface is provided with a first cam surface part which forms a first interval with the center of the rotating shaft and a second cam surface part which forms a second interval with the center of the rotating shaft, the first interval is smaller than the second interval, and two sides of the first cam surface part and two sides of the second cam surface part are connected in a gradual transition way through an arc surface; the (front side) side of cam is provided with the changeover axle, and the changeover axle has arranged first link arm, second link arm along its self axial interval, and first link arm, second link arm all are towards the radial extension setting of keeping away from the axle center of changeover axle, and first link arm, second link arm stagger in the circumference of changeover axle and arrange. So that the first linkage arm and the second linkage arm form an included angle, and the included angle is generally an acute angle. The outer end of the first linkage arm is contacted with the cam circumferential surface to be linked by the cam circumferential surface, and the outer end of the second linkage arm is connected with an eccentric linkage point at the end part of the thread take-up lever driving shaft. An annular groove is formed on the periphery of the cam peripheral surface for receiving the outer end of the first link arm of the setting position.

In practical use, it is difficult to meet the requirement of further noise reduction, and if further improvement of sewing speed is desired, the running difficulty is great. The applicant has therefore studied a new technical solution which further improves the innovation of the double needle sewing machine.

Disclosure of utility model

In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its main object is to provide a double-needle sewing machine, which changes the transmission structure of the thread take-up lever based on the premise of adjustable double-needle distance, thereby being beneficial to reducing the operation sound of the sewing machine and improving the sewing speed.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The double-needle sewing machine comprises a first sewing needle bar assembly, a first thread taking-up lever, a first rotating shuttle assembly, a second sewing needle bar assembly, a second thread taking-up lever and a second rotating shuttle assembly, wherein the first rotating shuttle assembly is positioned below the first sewing needle bar assembly, and the second rotating shuttle assembly is positioned below the second sewing needle bar assembly; the first sewing needle bar assembly is arranged on a needle bar driving shaft, the first thread take-up lever is arranged on a thread take-up lever driving shaft, and the first rotating shuttle assembly is arranged on a rotating shuttle driving shaft; the needle bar driving shaft, the thread take-up lever driving shaft and the rotating shuttle driving shaft are all arranged in a left-right extending mode;

The second sewing needle bar component, the second thread taking-up lever and the second rotating shuttle component can be arranged in a left-right displacement mode so as to adjust the double-needle sewing distance;

The thread take-up driving shaft, the needle bar driving shaft and the rotating shuttle driving shaft share a driving motor as a driving source, the output end of the driving motor is connected with a rotating shaft, a balance wheel is arranged on the rotating shaft, a swing rod is eccentrically connected to the balance wheel, the swing rod is connected to the needle bar driving shaft to enable the needle bar driving shaft to move up and down along with the swing of the swing rod, and a connecting piece is connected between the swing rod and the thread take-up driving shaft to enable the thread take-up driving shaft to move up and down along with the swing of the swing rod.

As a preferable scheme, the lower section of the connecting piece is provided with a sleeve joint hole, the swing rod passes through the sleeve joint hole, the upper section of the connecting piece is provided with a slotted locking hole, and the thread take-up lever driving shaft passes through the slotted locking hole and is locked.

Preferably, the connecting piece is located between the first take-up lever and the second take-up lever.

As a preferable scheme, a first driving belt wheel is coaxially arranged on the rotating shaft, and the first driving belt wheel drives the rotating shuttle driving shaft to rotate through a synchronous belt and a second driving belt wheel which are arranged in a downward extending mode.

As a preferable scheme, the swing rod extends left and right and is positioned above the needle bar driving shaft, a connecting rod is connected between the swing rod and the needle bar driving shaft, through holes penetrating in the left and right directions are formed in the upper end and the lower end of the connecting rod, and the swing rod and the needle bar driving shaft penetrate through the through holes in the upper end and the lower end of the connecting rod so that the needle bar driving shaft moves up and down along with the swing.

As a preferable scheme, a first bevel gear is arranged on the rotating shaft, a second bevel gear is meshed with the first bevel gear, the second bevel gear is connected with an adjusting knob, and the adjusting knob is rotated to adjust the meshing tightness of the first bevel gear and the second bevel gear.

As a preferable mode, an integrated seat is arranged for the second sewing needle bar assembly and the second thread take-up lever; the integrated seat is provided with a vertical hole, the second sewing needle bar assembly can vertically movably pass through the vertical hole, and the second sewing needle bar assembly can be installed on the needle bar driving shaft in a left-right displacement mode; the second take-up lever can be arranged on the take-up lever driving shaft in a left-right displacement mode and rotate along with the take-up lever driving shaft, and the second take-up lever can be arranged on the integrated seat in a vertical rotation mode; the second rotating shuttle assembly can be installed on the rotating shuttle driving shaft in a left-right displacement mode and rotate along with the rotating shuttle driving shaft.

As a preferable scheme, the integrated seat is provided with an automatic distance adjusting mechanism, and the automatic distance adjusting mechanism drives the integrated seat and the second rotating shuttle assembly to synchronously move left and right.

As a preferable scheme, the automatic distance adjusting mechanism comprises a distance adjusting motor, a first screw rod and a second screw rod, wherein the first screw rod and the second screw rod are arranged in a left-right extending mode, the outer end of the first screw rod is connected with the integrated seat, and the outer end of the second screw rod is connected with the second rotating shuttle assembly;

The distance adjusting motor is connected with a first rotating shaft and a second rotating shaft in a driving mode, the first rotating shaft is connected with a first internal threaded hole portion, the second rotating shaft is connected with a second internal threaded hole portion, the inner end of the first screw rod is connected with the first internal threaded hole portion in a threaded mode and stretches into a first avoidance groove of the first rotating shaft, the inner end of the second screw rod is connected with the second internal threaded hole portion in a threaded mode and stretches into a second avoidance groove of the second rotating shaft, the distance adjusting motor is used for driving the first rotating shaft and the second rotating shaft to rotate, the first internal threaded hole portion and the second internal threaded hole portion correspondingly rotate, and the first screw rod and the second screw rod stretch out and draw back along the corresponding first avoidance groove and the second avoidance groove so that the integrated seat and the second rotating shuttle assembly move in a left-right displacement mode.

Compared with the prior art, the utility model has obvious advantages and beneficial effects, in particular, the technical proposal is that the utility model mainly changes the transmission structure of the thread take-up lever on the premise of adjustable double needle spacing, uses the thread take-up lever driving shaft, the needle lever driving shaft and the rotating shuttle driving shaft as a driving source by sharing one driving motor, the output end of the driving motor is connected with a rotating shaft, the rotating shaft is provided with a balance wheel, the balance wheel is eccentrically connected with a swinging rod, the swinging rod is connected with the needle lever driving shaft to enable the needle lever driving shaft to move up and down along with the swinging of the swinging rod, and a connecting piece is connected between the swinging rod and the thread take-up lever driving shaft, thereby being beneficial to reducing the operation sound of a sewing machine and improving the sewing speed.

In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a partial perspective view of a two-needle sewing machine (showing a first sewing needle bar assembly, a first take-up lever, a second sewing needle bar assembly, and a second take-up lever, the first rotating shuttle assembly, the second rotating shuttle assembly not shown) according to an embodiment of the present utility model;

FIG. 2 is another angular discrete view of the structure shown in FIG. 1;

FIG. 3 is a partial perspective view of the structure of FIG. 1 (showing the lever transmission structure);

Fig. 4 is a cross-sectional view of a first rotational shaft, a first internally threaded bore portion, a first lead screw, and an integrated seat in an embodiment of the present utility model.

The attached drawings are used for identifying and describing: the first sewing needle bar assembly 1, the first thread take-up lever 2, the second sewing needle bar assembly 3, the second thread take-up lever 4, the needle bar driving shaft 5, the thread take-up lever driving shaft 6, the driving motor 7, the rotating shaft 8, the first driving belt wheel 9, the synchronous belt 10, the balance wheel 11, the swing rod 12, the connecting rod 13, the first bevel gear 14, the second bevel gear 15, the adjusting knob 16, the connecting piece 17, the integrated seat 18, the distance adjusting motor 19, the first screw rod 20, the first rotating shaft 21, the first internal thread hole part 22 and the first avoiding groove 23.

Detailed Description

Referring to fig. 1 to 4, specific structures of embodiments of the present utility model are shown.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

The utility model provides a two-needle sewing machine, includes first sewing needle bar subassembly 1, first take-up lever 2, first rotating shuttle subassembly, second sewing needle bar subassembly 3, second take-up lever 4 and second rotating shuttle subassembly, first rotating shuttle subassembly is located the below of first sewing needle bar subassembly 1, second rotating shuttle subassembly is located the below of second sewing needle bar subassembly 3.

The first sewing needle bar assembly 1 is arranged on a needle bar driving shaft 5, the first thread take-up lever 2 is arranged on a thread take-up lever driving shaft 6, and the first rotating shuttle assembly is arranged on a rotating shuttle driving shaft; the needle bar driving shaft 5, the thread take-up lever driving shaft 6 and the rotating shuttle driving shaft are all arranged in a left-right extending mode; the second sewing needle bar assembly 3, the second thread take-up lever 4 and the second rotating shuttle assembly can be arranged in a left-right displacement mode so as to adjust the double-needle sewing distance.

The thread take-up lever driving shaft 6, the needle bar driving shaft 5 and the rotating shuttle driving shaft share a driving motor 7 as a driving source, the output end of the driving motor 7 is connected with a rotating shaft 8, a first driving belt wheel 9 is coaxially arranged on the rotating shaft 8, and a synchronous belt 10 and a second driving belt wheel which are arranged in a downward extending mode of the first driving belt wheel 9 drive the rotating shuttle driving shaft to rotate. The swing wheel 11 is arranged on the rotating shaft 8, the swing wheel 11 is eccentrically connected with the swing rod 12, the swing rod 12 is arranged along the left and right extension and is positioned above the needle bar driving shaft 5, a connecting rod 13 is connected between the swing rod 12 and the needle bar driving shaft 5, through holes penetrating in the left and right directions are formed in the upper end and the lower end of the connecting rod 13, and the swing rod 12 and the needle bar driving shaft 5 penetrate through the through holes in the upper end and the lower end of the connecting rod 13 so that the needle bar driving shaft 5 moves up and down along with swing. The rotating shaft 8 is provided with a first bevel gear 14, the first bevel gear 14 is meshed with a second bevel gear 15, the second bevel gear 15 is connected with an adjusting knob 16, and the adjusting knob 16 is rotated to adjust meshing tightness of the first bevel gear 14 and the second bevel gear 15. And a connecting piece 17 is connected between the swing rod 12 and the thread take-up lever driving shaft 6, so that the thread take-up lever driving shaft 6 moves up and down along with the swing of the swing rod 12. The lower section of the connecting piece 17 is provided with a sleeve joint hole, the swing rod 12 passes through the sleeve joint hole, the upper section of the connecting piece 17 is provided with a slotted locking hole, and the thread take-up lever driving shaft 6 passes through the slotted locking hole and is locked. And the connecting piece 17 is located between the first take-up lever 2 and the second take-up lever 4, on one hand, the stress part is distributed between the first take-up lever 2 and the second take-up lever 4, the up-down motion is more stable, on the other hand, the empty space between the first take-up lever 2 and the second take-up lever 4 is skillfully utilized, enough space is reserved for the connection of the balance wheel 11 and the swing rod 12, the setting of the connecting rod 13 and the distribution of the first bevel gear 14 and the second bevel gear 15, the design is more flexible, and the limitation of the original narrow space is avoided.

An integration seat 18 is arranged for the second sewing needle bar assembly 3 and the second thread take-up lever 4; the integrated seat 18 is provided with a vertical hole, the second sewing needle bar assembly 3 can vertically movably pass through the vertical hole, and the second sewing needle bar assembly 3 can be installed on the needle bar driving shaft 5 in a left-right displacement mode; the second take-up lever 4 is mounted on the take-up lever driving shaft 6 in a left-right displacement manner and rotates along with the take-up lever driving shaft 6, and the second take-up lever 4 is mounted on the integrated seat 18 in a vertical rotation manner; the second rotating shuttle assembly can be installed on the rotating shuttle driving shaft in a left-right displacement mode and rotate along with the rotating shuttle driving shaft. The integrated seat 18 is provided with an automatic distance adjusting mechanism, and the automatic distance adjusting mechanism drives the integrated seat 18 and the second rotating shuttle assembly to synchronously move left and right. Here, the automatic distance adjusting mechanism includes a distance adjusting motor 19, a first screw rod 20 and a second screw rod, where the first screw rod 20 and the second screw rod are both extended left and right, the outer end of the first screw rod 20 is connected to the integrated seat 18, and the outer end of the second screw rod is connected to the second rotating shuttle assembly; the distance adjusting motor 19 is in driving connection with a first rotating shaft 21 and a second rotating shaft, the first rotating shaft 21 is connected with a first internal threaded hole 22, the second rotating shaft is connected with a second internal threaded hole 22, the inner end of the first screw rod 20 is in threaded connection with the first internal threaded hole 22 and stretches into a first avoidance groove 23 of the first rotating shaft 21, the inner end of the second screw rod is in threaded connection with the second internal threaded hole and stretches into a second avoidance groove of the second rotating shaft, the distance adjusting motor 19 drives the first rotating shaft 21 and the second rotating shaft to rotate, the first internal threaded hole 22 and the second internal threaded hole correspondingly rotate, and the first screw rod 20 and the second screw rod correspondingly stretch out and draw back along the first avoidance groove 23 and the second avoidance groove so as to enable the corresponding integrating seat 18 and the second rotating shuttle assembly to move along left and right displacement. The motor, the rotating shaft, the internal threaded hole part and the screw rod are matched for use, so that the distance adjusting precision is high, and the requirement of double-line-spacing sewing machining precision is better met.

The utility model mainly changes the transmission structure of the thread take-up lever on the premise of adjustable distance between two needles, uses the thread take-up lever driving shaft 6, the needle lever driving shaft 5 and the rotating shuttle driving shaft as a driving source by sharing a driving motor 7, the output end of the driving motor 7 is connected with a rotating shaft 8, a balance wheel 11 is arranged on the rotating shaft 8, a swing rod 12 is eccentrically connected on the balance wheel 11, the swing rod 12 is connected with the needle lever driving shaft 5 so that the needle lever driving shaft 5 moves up and down along with the swing of the swing rod 12, and a connecting piece 17 is connected between the swing rod 12 and the thread take-up lever driving shaft 6 so that the thread take-up lever driving shaft 6 moves up and down along with the swing of the swing rod 12, thereby being beneficial to reducing the operation sound of a sewing machine and improving the sewing speed.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model are still within the scope of the technical solutions of the present utility model.

Claims

1. The utility model provides a two-needle sewing machine, including first sewing needle bar subassembly, first take-up lever, first rotating shuttle subassembly, second sewing needle bar subassembly, second take-up lever and second rotating shuttle subassembly, first rotating shuttle subassembly is located the below of first sewing needle bar subassembly, second rotating shuttle subassembly is located the below of second sewing needle bar subassembly, its characterized in that:

The first sewing needle bar assembly is arranged on a needle bar driving shaft, the first thread take-up lever is arranged on a thread take-up lever driving shaft, and the first rotating shuttle assembly is arranged on a rotating shuttle driving shaft; the needle bar driving shaft, the thread take-up lever driving shaft and the rotating shuttle driving shaft are all arranged in a left-right extending mode;

2. The two-needle sewing machine of claim 1, wherein: the lower section of the connecting piece is provided with a sleeve joint hole, the swing rod penetrates through the sleeve joint hole, the upper section of the connecting piece is provided with a slotted locking hole, and the thread take-up lever driving shaft penetrates through the slotted locking hole and is locked.

3. The two-needle sewing machine according to claim 1 or 2, characterized in that: the connecting piece is positioned between the first take-up lever and the second take-up lever.

4. The two-needle sewing machine of claim 1, wherein: the rotating shaft is coaxially provided with a first driving belt wheel, and the first driving belt wheel drives the rotating shuttle driving shaft to rotate through a synchronous belt and a second driving belt wheel which are arranged in a downward extending mode.

5. The two-needle sewing machine of claim 1, wherein: the swing rod extends left and right and is positioned above the needle bar driving shaft, a connecting rod is connected between the swing rod and the needle bar driving shaft, through holes penetrating left and right are formed in the upper end and the lower end of the connecting rod, and the swing rod and the needle bar driving shaft penetrate through the through holes in the upper end and the lower end of the connecting rod so that the needle bar driving shaft moves up and down along with swing.

6. The two-needle sewing machine of claim 1, wherein: the rotary shaft is provided with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is connected with an adjusting knob, and the adjusting knob is rotated to adjust the meshing tightness of the first bevel gear and the second bevel gear.

7. The two-needle sewing machine of claim 1, wherein: an integrated seat is arranged for the second sewing needle bar component and the second thread take-up lever; the integrated seat is provided with a vertical hole, the second sewing needle bar assembly can vertically movably pass through the vertical hole, and the second sewing needle bar assembly can be installed on the needle bar driving shaft in a left-right displacement mode; the second take-up lever can be arranged on the take-up lever driving shaft in a left-right displacement mode and rotate along with the take-up lever driving shaft, and the second take-up lever can be arranged on the integrated seat in a vertical rotation mode; the second rotating shuttle assembly can be installed on the rotating shuttle driving shaft in a left-right displacement mode and rotate along with the rotating shuttle driving shaft.

8. The two-needle sewing machine of claim 7, wherein: the integrated seat is provided with an automatic distance adjusting mechanism, and the automatic distance adjusting mechanism drives the integrated seat and the second rotating shuttle assembly to synchronously move left and right.

9. The two-needle sewing machine of claim 8, wherein: the automatic distance adjusting mechanism comprises a distance adjusting motor, a first screw rod and a second screw rod, wherein the first screw rod and the second screw rod are arranged in a left-right extending mode, the outer end of the first screw rod is connected with the integrated seat, and the outer end of the second screw rod is connected with the second rotating shuttle assembly;