CN107916505B

CN107916505B - Thread taking-up and threading mechanism of sewing machine

Info

Publication number: CN107916505B
Application number: CN201711403208.8A
Authority: CN
Inventors: 张康; 胡彬; 卢孔贵; 楼俏军
Original assignee: Zhongjie Sewing Machine Co Ltd
Current assignee: Zhongjie Sewing Machine Co Ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2023-07-11
Anticipated expiration: 2037-12-22
Also published as: CN107916505A

Abstract

The invention provides a thread taking-up and threading mechanism of a sewing machine, and belongs to the technical field of sewing machines. It has solved current take-up and has crossed the unsmooth scheduling problem of line mechanism. The thread taking-up and threading mechanism of the sewing machine comprises a thread hook, a thread taking-up spring and a right thread hook, wherein the thread hook is fixed on a sewing machine shell, the thread taking-up and threading mechanism of the sewing machine further comprises a mounting seat fixedly connected to the sewing machine shell, the thread taking-up spring comprises a rod body in a long rod shape, a fixed end and a thread hooking end, the fixed end and the thread hooking end are respectively positioned at two ends of the rod body, the thread hooking end is fixedly connected to the mounting seat and used for threading and positioned between the right thread hook and the thread hook, a position-adjustable adjusting piece is further connected to the mounting seat, and the adjusting piece is positioned at one side of the rod body and can be abutted to the adjusting piece. The thread take-up and thread-passing mechanism has the advantages of smooth thread passing and the like.

Description

Thread taking-up and threading mechanism of sewing machine

Technical Field

The invention belongs to the technical field of sewing machines, and relates to a thread taking-up and threading mechanism of a sewing machine.

Background

The sewing machine is a machine for sewing materials through a suture and comprises a needle bar mechanism, a thread picking mechanism, a feeding mechanism, a thread hooking mechanism, a pressing mechanism, a thread clamping device, a lubricating device and the like. The thread taking-up and threading mechanism guides and conveys the suture on the coil to the suture needle and cooperates with the needle bar mechanism to feed the suture.

The Chinese patent literature data discloses and proposes a thread supplying mechanism for a sewing machine [ application number: 20162046788. X; bulletin number: 205636082U ], including take-up lever, take-up spring and the clamp that sets gradually along the facial line direction of feed, be equipped with between take-up lever and take-up spring and supply line volume adjustment mechanism, supply line volume adjustment mechanism to include first line and collude, the second line colludes and arrange in first line and collude and the second line collude between the regulating disk of synchronous action with the sewing machine main shaft, the location is equipped with the third line on the regulating disk and colludes to the distance adjustable of regulating disk rotation center, the third line colludes along with the rotation of regulating disk and colludes, the third line colludes and the second line colludes the straight line distance between the three points to change the first line and collude the supply line volume between the second line and collude, realize the take-up function.

The adjusting disk comprises a mounting frame and a disk, wherein the mounting frame is cylindrical and provided with a radially extending open slot, the disk is provided with a radially extending long hole, the disk is fixed on the mounting frame through a screw, the long hole is communicated with the open slot to form a long slot, and the third wire hook can slide in the long slot. The positioning sheet is also provided with a radially extending opening part, and the positioning sheet is used for pressing the third wire hook through a screw, so that the third wire hook is positioned in the long groove and is not moved. The third wire hook and the adjusting disc are of rigid connection structures, and wire passing is easy to be unsmooth.

Disclosure of Invention

The invention aims at solving the problems existing in the prior art, and provides a thread taking-up and threading mechanism of a sewing machine, which solves the technical problem of smooth thread taking-up and threading of the thread taking-up and threading mechanism.

The aim of the invention can be achieved by the following technical scheme:

the utility model provides a take-up thread passing mechanism of sewing machine, includes line hook, take-up spring and right line hook, the line hook is fixed on the sewing machine casing, its characterized in that, sewing machine's take-up thread passing mechanism still includes the mount pad of fixed connection on the sewing machine casing, take-up spring is including being long rod-shaped body of rod and being located the stiff end and the hook line end at body of rod both ends respectively, stiff end fixed connection is on the mount pad, the hook line end is used for crossing the line and is located between right line hook and the line hook, still be connected with the adjustable regulating part in position on the mount pad, the regulating part is located one side of the body of rod and the body of rod can support on the regulating part.

The sewing machine is also provided with a thread clamp, a thread take-up lever and a left thread hook. The suture sequentially passes through the thread clamp, the thread hook, the thread hooking end and the right thread hook, then passes through the thread taking-up lever and then passes through the left thread hook. When the thread take-up lever moves upwards, the thread is pulled by the thread take-up lever, and the thread take-up spring moves towards the direction close to the thread take-up lever under the action of the thread and deforms the thread take-up spring; when the thread take-up lever moves downwards, the thread is loosened, the thread take-up spring resets to enable the thread take-up end to move in the direction away from the thread take-up lever, the thread supply quantity between the right thread hook and the thread hook is changed in the process of the thread take-up end moving, and the thread take-up and threading function of the thread take-up and threading mechanism is realized. The take-up spring with the rod body in a long rod shape is arranged between the right wire hook and the wire hook, so that the take-up and wire-passing function of the regulating disc in the prior art is realized, and in the process of taking up and wire-passing of the mechanism, the take-up spring can adaptively and automatically adjust the deformation according to the wire tension of a suture, so that the suture can pass smoothly on the take-up and wire-passing mechanism, and meanwhile, the take-up spring does not need to be connected with a main shaft, so that the take-up and wire-passing mechanism is convenient to install. The adjusting piece can limit the movable range of the thread take-up spring, and prevent the thread from being disordered or even wound due to excessive rebound in the reset process of the thread take-up spring, so that the thread passing is smooth. The position of the adjusting piece is adjustable, and the thread picking spring can be better controlled by adjusting the position of the adjusting piece, so that the thread passing of the thread is smooth.

In the thread take-up and threading mechanism of the sewing machine, the mounting seat is provided with the adjusting groove which is in a strip shape, an adjusting screw capable of sliding in the adjusting groove is arranged in the adjusting groove, the adjusting piece is in threaded connection with the adjusting screw, and the mounting seat is fixed on the shell of the sewing machine through the adjusting screw and the adjusting piece.

The adjusting piece is abutted against the mounting seat after being screwed, so that the mounting seat is fixed on the machine shell. When the position of the mounting seat is adjusted, the adjusting piece is unscrewed firstly, then the mounting seat is moved to the position to be adjusted, and then the adjusting piece is screwed down, so that the mounting seat is fixed. The difference between the maximum and minimum thread supply amounts between the right and the thread hooks is the take-up amount. The distance between the thread hooking end of the thread taking-up spring and the thread taking-up lever can be changed when the position of the mounting seat is regulated, so that the thread taking-up amount of the thread taking-up spring can be changed. The thread take-up amount is regulated, so that the thread take-up and thread-passing mechanism is better suitable for the suture thread, and the suture thread passing is smooth. The adjusting piece has both a limiting function and a fixing function, and can be used for two purposes, so that the thread taking-up and threading mechanism is compact in structure.

In the thread taking-up and threading mechanism of the sewing machine, the fixing screw is fixed on the mounting seat, the fixing nut is connected with the fixing screw in a threaded manner, the fixing nut is provided with the fixing hole, the fixing end comprises a collar part formed by bending and a fixing head connected with the collar part, the collar part is sleeved on the fixing screw and is positioned between the mounting seat and the fixing nut, and the fixing head is inserted into the fixing hole.

The fixed head rotates along with the fixed nut when the fixed nut is rotated, so that the position of the thread hooking end can be adjusted, the change of the thread picking elastic force is adjusted, the deformation of the thread picking spring is better adapted to different thread tensions, and the thread passing on the thread picking and passing mechanism is smooth. And meanwhile, the setting of the fixing screw and the fixing nut enables the thread take-up spring to be convenient to install.

In the thread taking-up and threading mechanism of the sewing machine, the thread taking-up end comprises a threading part which is bent to form a single ring shape or multiple ring shapes, and a central hole of the threading part is a threading hole.

The thread passing part is in a closed ring shape, and the suture can not be separated from the thread passing part after passing through the thread passing hole, so that the suture can be smoothly passed on the thread taking-up and passing mechanism.

In the thread taking-up and threading mechanism of the sewing machine, the right thread hook is fixedly connected to the mounting seat. The right wire hook and the wire taking-up spring are both fixed on the mounting seat, so that the wire taking-up and threading mechanism can be conveniently mounted.

In the thread taking-up and threading mechanism of the sewing machine, the right thread hook is sheet-shaped, the end part of the right thread hook is bent to form a hook-shaped part, the right thread hook is provided with a mounting groove corresponding to the adjusting groove, the mounting groove is strip-shaped, the adjusting screw penetrates through the mounting groove, and the hook-shaped part is positioned at the left side of the thread hooking end.

The right wire hook is fixed on the mounting seat through the adjusting screw, so that the right wire hook is convenient to mount.

Compared with the prior art, the invention has the following advantages:

the thread take-up spring is provided with a long rod-shaped rod body, the fixed end of the thread take-up spring is fixed on the mounting seat, the thread hooking end of the thread take-up spring is used for hooking threads and is positioned between the right thread hook and the thread hook, the thread take-up spring can adaptively adjust the deformation according to the thread tension, and the mounting seat is also provided with a position-adjustable adjusting piece, so that the thread take-up mechanism can smoothly pass threads. The fixed end is provided with a sleeve ring part and a fixed head, the mounting seat is provided with a fixed screw, the fixed screw is connected with a fixed nut in a threaded manner, the sleeve ring part is sleeved on the fixed screw, and the fixed head is inserted into a fixed hole of the fixed nut, so that the adjustment of the thread taking-up elasticity of the thread taking-up spring is realized, and the thread passing of a suture on the thread taking-up mechanism is smooth. The thread hooking end is provided with a closed annular thread passing part, and a central hole on the thread passing part passes through a thread hole, so that the thread is prevented from being separated from the thread picking spring, and smooth thread passing of the thread on the thread picking and passing mechanism is facilitated. The adjusting groove and the adjusting screw are arranged, so that the position of the mounting seat can be adjusted, the thread take-up amount can be adjusted, and smooth thread passing of the suture on the thread take-up and thread passing mechanism is facilitated. The right wire hook is further fixed on the mounting seat and fixed on the mounting seat through the adjusting screw and the adjusting piece, so that the right wire hook is convenient to mount and the take-up amount is convenient to adjust.

Drawings

FIG. 1 is a partial perspective view of the present take-up and threading mechanism;

FIG. 2 is a front view of the present take-up thread passing mechanism when mounted on a sewing machine;

fig. 3 is a perspective view of a take-up spring in the present take-up threading mechanism.

In the figure, 1, a shell; 2. a left wire hook; 3. a thread take-up lever; 4. a wire hook; 5. a wire clip; 6. a mounting base; 6a, an adjusting groove; 7. a right wire hook; 7a, a hook part; 7b, a mounting groove; 8. a thread take-up spring; 8a, a rod body; 8b, fixed end; 8b1, a collar portion; 8b2, a fixed head; 8c, hooking the wire end; 8c1, a wire passing part; 8c2, wire passing holes; 9. an adjusting member; 10. an adjusting screw; 11. a fixing screw; 12. a fixing nut; 12a, fixing holes.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1 to 3, the sewing machine comprises a machine shell 1 and a bedplate, a needle bar vertically penetrates through the left end of the machine shell 1, and the lower end of the needle bar is fixedly connected with an organic needle. A thread taking-up and threading mechanism of a sewing machine comprises a thread hook 4, a thread taking-up spring 8 and a right thread hook 7 which are all fixed on a sewing machine shell 1, wherein the sewing machine shell 1 is also provided with a left thread hook 2, a thread taking-up lever 3 and a thread clamp 5. The thread take-up and thread-passing mechanism of the sewing machine further comprises a plate-shaped mounting seat 6 fixed on the machine shell 1, the right thread hook 7 and the thread take-up spring 8 are fixed on the mounting seat 6, the right thread hook 7 is fixed on the inner side surface of the mounting seat 6, and the inner side surface of the mounting seat 6 is one surface of the mounting seat 6 opposite to the outer side surface of the machine shell 1. The thread take-up spring 8 is fixed on the outer side surface of the mounting seat 6. The right wire hook 7 is sheet-shaped, the right wire hook 7 is transversely arranged, the left end of the right wire hook 7 is bent to form a hook-shaped part 7a, the right wire hook 7 is provided with a mounting groove 7b, and the mounting groove 7b is strip-shaped.

The thread take-up spring 8 has elasticity, and the thread take-up spring 8 comprises a rod body 8a in a long rod shape, a fixed end 8b and a thread hooking end 8c which are respectively positioned at two ends of the rod body 8a, wherein the fixed end 8b is fixed on the mounting seat 6, and the thread hooking end 8c is used for threading and is positioned between the thread hook 4 and the right thread hook 7. The length of the lever body 8a is longer than the lever portion of the take-up spring mounted on the universal clamper 5. The mounting seat 6 is also provided with an adjusting piece 9, the rod body 8a is positioned on the left side of the adjusting piece 9, the rod body 8a can be abutted against the adjusting piece 9, and the position of the adjusting piece 9 on the mounting seat 6 is adjustable. The mounting seat 6 is provided with an adjusting groove 6a, the adjusting groove 6a is in a strip shape, an adjusting screw 10 capable of sliding in the adjusting groove 6a is arranged in the adjusting groove 6a, an adjusting piece 9 is connected to the adjusting screw 10 in a threaded mode, the adjusting screw 10 is fixed on the machine shell 1, and the mounting seat 6 is fixed on the machine shell 1 through the adjusting screw 10 and the adjusting piece 9. The adjusting member 9 may be a nut having a hexagonal prism shape. The adjusting member 9 may be cylindrical, and the outer circumferential surface of the adjusting member 9 is provided with a plurality of protruding anti-slip strips which are uniformly distributed along the circumferential direction on the outer circumferential surface of the adjusting member 9. The mounting groove 7b is provided corresponding to the adjustment groove 6a, the adjustment screw 10 passes through the mounting groove 7b, the right wire hook 7 is located above the wire hooking end 8c and the hook portion 7a is located on the left side of the wire hooking end 8 c. After the adjustment member 9 is screwed, the right wire hook 7 is fixed to the mount 6 while the mount 6 is fixed to the housing 1. The mounting seat 6 is fixedly provided with a fixing screw 11, the fixing screw 11 is in threaded connection with a fixing nut 12, and the fixing nut 12 is provided with a fixing hole 12a. The fixed end 8b includes a collar portion 8b1 formed by bending and a fixed head 8b2 connected to the collar portion 8b1, the collar portion 8b1 is sleeved on the fixed screw 11 and located between the mounting seat 6 and the fixed nut 12, and the fixed head 8b2 is inserted into the fixed hole 12a. The wire hooking end 8c includes a wire passing portion 8c1 bent to form a single loop or a plurality of loops, and a center hole of the wire passing portion 8c1 is a wire passing hole 8c2.

The left and

right hooks

2 and 7 are located on both sides of the take-up lever 3, the wire hook 4 and the wire gripper 5 are located below the mount 6, and the wire hook 4 is located on the left side of the wire passing portion 8c 1. The suture can pass through the thread clamp 5, the thread hook 4, the thread hooking end 8c of the thread taking-up spring 8, the right thread hook 7, the thread taking-up lever 3 and the left thread hook 2 in sequence and then penetrate into the needle. When the thread take-up lever 3 moves upwards, the thread is pulled by the thread take-up lever 3, and the thread take-up spring 8 moves leftwards under the action of the thread to enable the thread take-up end 8c to deform; when the thread take-up lever 3 moves downwards, the thread is loosened, the thread take-up spring 8 is reset, the thread supply quantity between the right thread hook 7 and the thread hook 4 is changed in the process of moving the thread hooking end 8c, and the thread take-up and threading function of the thread take-up and threading mechanism is realized. The rod body 8a is provided with the long rod-shaped thread taking-up spring 8 between the right thread hook 7 and the thread hook 4 to realize the thread taking-up and threading function of the regulating disc in the prior art, and the thread taking-up spring 8 can adaptively and automatically regulate the deformation according to the thread tension of the thread in the thread taking-up and threading process of the mechanism, so that the thread can be smoothly threaded on the thread taking-up and threading mechanism. The thread take-up spring 8 is not required to be connected with the main shaft, and the thread take-up spring 8 and the right thread hook 7 are fixed on the mounting seat 6, so that the thread take-up and thread passing mechanism is convenient to mount. Simultaneously, the mechanism uses a thread taking-up spring 8, a thread hook 4 and a right thread hook 7, and compared with the prior art, the mechanism uses four thread hooks which are independently fixed on a shell and an adjusting disc with a complex structure, and is more convenient and quicker to install. Through setting up the adjustable regulating part 9 of position, can be better control take-up spring 8, make the suture pass the line smoothly.

Example two

The adjusting piece 9 is a bolt, and the mounting seat 6 is directly fixed on the casing 1 through a screw. The right side that is located body of rod 8a on mount pad 6 is provided with the fixing base, and bolt threaded connection is on the fixing base, and the bolt transversely sets up and body of rod 8a can support the head of leaning on the bolt for the fixing base. The other structure is the same as that of the first embodiment. The bolt can limit the excessive rebound of the thread taking-up spring 8 during resetting, and prevent the thread from being wound into a thread loop.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a take-up of sewing machine passes line mechanism, includes line hook (4), take-up spring (8) and right line hook (7), line hook (4) are fixed on sewing machine casing (1), its characterized in that, sewing machine's take-up is crossed line mechanism and is still including fixed connection mount pad (6) on sewing machine casing (1), take-up spring (8) are including being the stiff end (8 b) and hook end (8 c) that are long shaft-like body of rod (8 a) both ends respectively, stiff end (8 b) are fixed on mount pad (6), hook end (8 c) are used for crossing the line and are located between right line hook (7) and line hook (4), still be connected with position adjustable regulating part (9) on mount pad (6), regulating part (9) and stiff end (8 b) separate the setting and be located the below of stiff end (8 b), body of rod (8 a) inserts right line (7) and regulating part (9) and just lie in stiff end (8 b) and can support line (9) and install on relative setting screw (10) with adjusting part (6) on sewing machine casing (1).

2. The thread take-up and threading mechanism of a sewing machine according to claim 1, wherein the mounting seat (6) is provided with an adjusting groove (6 a), the adjusting groove (6 a) is strip-shaped, the adjusting screw (10) is arranged in the adjusting groove (6 a) and can slide in the adjusting groove (6 a), and the adjusting piece (9) is in threaded connection with the adjusting screw (10).

3. The thread take-up and threading mechanism of a sewing machine according to claim 1, characterized in that a fixing screw (11) is fixed on the mounting base (6), a fixing nut (12) is connected to the fixing screw (11) in a threaded manner, a fixing hole (12 a) is formed in the fixing nut (12), the fixing end (8 b) comprises a collar portion (8 b 1) formed by bending and a fixing head (8 b 2) connected with the collar portion (8 b 1), the collar portion (8 b 1) is sleeved on the fixing screw (11) and is located between the mounting base (6) and the fixing nut (12), and the fixing head (8 b 2) is inserted into the fixing hole (12 a).

4. A thread take-up and threading mechanism of a sewing machine according to any one of claims 1 to 3, wherein the thread take-up end (8 c) includes a thread passing portion (8 c 1) bent to form a single loop or a plurality of loops, and a center hole of the thread passing portion (8 c 1) is a thread passing hole (8 c 2).

5. The thread take-up and threading mechanism of a sewing machine according to claim 2, wherein the right thread hook (7) is fixedly connected to the mounting base (6).

6. The thread take-up and threading mechanism of a sewing machine according to claim 5, wherein the right thread hook (7) is in a sheet shape, an end portion of the right thread hook (7) is bent to form a hook portion (7 a), a mounting groove (7 b) corresponding to the adjusting groove (6 a) is provided on the right thread hook (7), the mounting groove (7 b) is in a strip shape, the adjusting screw (10) passes through the mounting groove (7 b), and the hook portion (7 a) is positioned at the left side of the thread hooking end (8 c).