CN210438940U

CN210438940U - Sewing machine

Info

Publication number: CN210438940U
Application number: CN201921002607.8U
Authority: CN
Inventors: 杨培; 冯振中; 汪新良; 卢孔贵; 楼俏军
Original assignee: Zhejiang Zoje Sewing Machine Co Ltd
Current assignee: Zhejiang Zoje Sewing Machine Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-05-01
Anticipated expiration: 2029-06-28

Abstract

The utility model provides a sewing machine, include: a needle bar; the first driving part is in driving connection with the needle rod to drive the needle rod to rotate; the second driving part is in driving connection with the needle rod to drive the needle rod to lift; the thread picking disc is arranged above the needle rod and comprises a rotary arm which is rotatably arranged, a threading hole for threading a thread is formed in the rotary arm, and the rotary arm is used for guiding the thread entering the needle rod from the threading hole. Because the needle bar can rotate, the circumferential angle of the needle bar can be adjusted when sewing, so that the needle bar and the machine needle are matched with the track, the sewing thread can be prevented from being wound on the machine needle or the needle bar, the sewing track can be consistent with the set pattern track, and the sewing efficiency and the quality of sewing patterns can be improved. And the thread entering the needle bar can be guided through the rotation of the rotating arm, and the rotating motion of the rotating arm is matched with the up-and-down motion of the needle bar so as to realize the smooth sewing.

Description

Sewing machine

Technical Field

The utility model relates to a make up equipment technical field, particularly, relate to a sewing machine.

Background

With the improvement of sewing requirements, the sewing of the cloth presents the characteristics of multifarious and flexible sewing, so that the track of the sewing thread on the cloth needs to be changed frequently. Therefore, when sewing, the sewing thread is easy to be wound on the machine needle or the needle rod, and the sewing efficiency and quality are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sewing machine to solve the problem that the sewing thread is easily wound on the needle or the needle rod in the prior art.

In order to solve the above problem, the utility model provides a sewing machine, include: a needle bar; the first driving part is in driving connection with the needle rod to drive the needle rod to rotate; the second driving part is in driving connection with the needle rod to drive the needle rod to lift; the thread picking disc is arranged above the needle rod and comprises a rotary arm which is rotatably arranged, a threading hole for threading a thread is formed in the rotary arm, and the rotary arm is used for guiding the thread entering the needle rod from the threading hole.

Further, the rotating arm includes: the arm body can rotate around a preset central line, and the threading hole is formed in the arm body; and the arc-shaped plate is arranged at one end of the arm body far away from the preset central line.

Further, the take-up reel further comprises: the static disc is of a hollow structure; the arc-shaped guard plate is arranged at the edge of the static disc; the carousel rotationally sets up in the hollow area of quiet dish, and the swinging boom setting is on the carousel, and the rotation area of swinging boom is located the outer peripheral edges of quiet dish.

Furthermore, the first driving part comprises a transmission belt and a transmission wheel, the transmission belt is in driving connection with the transmission wheel, and the transmission wheel is in driving connection with the needle rod.

Further, have first spacing face on the outer wall of needle bar, first drive division still includes: the driving sleeve is provided with a second limiting surface, the needle rod is arranged in the driving sleeve in a penetrating mode, and the first limiting surface is matched with the second limiting surface so as to prevent the needle rod and the driving sleeve from moving relative to each other in the circumferential direction; the driving wheel is connected with the driving sleeve to drive the needle rod to rotate through the driving sleeve.

Further, the driving sleeve includes: the needle rod penetrates through the sleeve body, a notch is formed in the side wall of the sleeve body, and the first limiting surface faces the notch; and the limiting block is arranged at the notch, and the second limiting surface is positioned on the limiting block.

Further, the sewing machine further includes: the first driving part and the second driving part are arranged on the machine head; the driving sleeve comprises a sleeve body and a connecting plate arranged below the sleeve body, the driving wheel is arranged below the connecting plate, the needle rod sequentially penetrates through the sleeve body, the connecting plate and the driving wheel, and the sleeve body is rotatably arranged in the lower side wall of the machine head.

Further, the radial dimension of the connecting plate is greater than the radial dimension of the cover body, the connecting plate is located below the lower side wall, the upper portion protrusion of the cover body is located above the lower side wall, and the first driving portion further comprises: the fixed part is connected with the upper part of the sleeve body, the radial size of the fixed part is larger than that of the sleeve body, and the fixed part and the connecting plate limit the axial direction of the sleeve body together.

Further, the first driving part further includes: the driving wheel is in driving connection with the transmission belt, the driving wheel and the transmission wheel are synchronous wheels, and the transmission belt is a synchronous belt.

Further, the second driving part includes: the limiting structure is connected with the needle rod; the needle bar passes the driving piece, and the needle bar can rotate relative to the driving piece, and the driving piece is with spacing cooperation of limit structure in order to prevent driving piece and needle bar to take place relative movement in the axial, and the driving piece can set up with driving the needle bar and go up and down with reciprocating.

Furthermore, the limiting structure comprises a limiting piece, the needle rod penetrates through the through hole of the limiting piece, a notch communicated with the through hole of the limiting piece is formed in the side wall of the limiting piece, and the width of the notch is adjustable; the locating part is two, and two locating parts interval sets up, and the driving piece sets up between two locating parts.

Use the technical scheme of the utility model, set up needle bar, first drive division and second drive division in sewing machine, wherein, first drive division can drive the needle bar rotatory, and the second drive division can drive the needle bar and go up and down. Because the needle bar can rotate, consequently the circumference angle of adjustable needle bar when sewing to make needle bar and eedle and orbit match more, the needle bar is hollow structure, and the suture passes from the needle bar, can avoid the suture to twine on eedle or needle bar like this, and can make the orbit of sewing keep unanimous with the style orbit of settlement, thereby can improve and make efficiency of sewing and make the quality of style. And the thread entering the needle bar can be guided through the rotation of the rotating arm, and the rotating motion of the rotating arm is matched with the up-and-down motion of the needle bar so as to realize the smooth sewing.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a sewing machine according to an embodiment of the present invention;

FIG. 2 shows a side view of the sewing machine of FIG. 1;

FIG. 3 shows an assembly view of the needle bar of FIG. 1 with the first drive portion and the second drive portion;

fig. 4 shows an exploded view of a part of the first drive section of fig. 3.

Wherein the figures include the following reference numerals:

10. a needle bar; 11. a first limiting surface; 21. a transmission belt; 22. a driving wheel; 23. a drive sleeve; 231. a sleeve body; 232. a limiting block; 233. a connecting plate; 24. a fixing member; 25. an upper thrust bearing; 26. a lower thrust bearing; 27. a needle bearing; 30. a machine head; 61. a drive member; 62. a limiting member; 71. a rotating arm; 711. an arm body; 712. an arc-shaped plate; 72. a stationary disc; 73. an arc-shaped guard plate; 74. a turntable.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides a sewing machine, including: a needle bar 10; the first driving part is in driving connection with the needle bar 10 to drive the needle bar 10 to rotate; the second driving part is in driving connection with the needle bar 10 to drive the needle bar 10 to ascend and descend; and the thread take-up disk is arranged above the needle bar 10 and comprises a rotary arm 71 which is rotatably arranged, a thread passing hole for passing a thread is formed in the rotary arm 71, and the rotary arm 71 is used for guiding the thread entering the needle bar 10 from the thread passing hole.

By applying the technical scheme of the embodiment, the sewing machine is provided with the needle bar 10, the first driving part and the second driving part, wherein the first driving part can drive the needle bar 10 to rotate, and the second driving part can drive the needle bar 10 to lift. Because the needle bar 10 can rotate, the circumferential angle of the needle bar 10 can be adjusted during sewing, so that the needle bar 10 and a machine needle are matched with the track, the needle bar 10 is of a hollow structure, a suture passes through the needle bar 10, the suture can be prevented from being wound on the machine needle or the needle bar 10, the sewing track can be consistent with the set pattern track, and the sewing efficiency and the quality of sewing patterns can be improved. Further, the thread introduced into the needle bar 10 is guided by the rotation of the rotary arm 71, and the rotary motion of the rotary arm 71 is matched with the vertical motion of the needle bar 10 to smoothly perform the sewing.

In the present embodiment, the rotating arm 71 includes: the arm body 711, the arm body 711 can rotate around the predetermined central line, the threading hole is set in the arm body 711; and an arc plate 712 disposed at an end of the arm body 711 distant from the predetermined center line. The suture is guided by the rotation of the arm 711 and the arc plate 712, in cooperation with the up-and-down movement of the needle bar 10.

In this embodiment, the thread take-up spool further includes: the static disc 72, the static disc 72 is a hollow structure; an arc-shaped guard plate 73 arranged at the edge of the static disc 72; and a rotating disk 74 rotatably disposed in the hollow area of the stationary disk 72, the rotating arm 71 being disposed on the rotating disk 74, the rotating area of the rotating arm 71 being located in the outer periphery of the stationary disk 72. The arc guard plate 73 can play a role in protection and avoid the scattered stitches. The rotation of the rotary disk 74 drives the rotary arm 71 to rotate.

In this embodiment, the first driving portion comprises a belt 21 and a transmission wheel 22, the belt 21 is in driving connection with the transmission wheel 22, and the transmission wheel 22 is in driving connection with the needle bar 10. The driving belt 21 and the driving wheel 22 are adopted to drive the needle bar 10 to rotate, the structure is simple, and the control is convenient.

In this embodiment, the outer wall of the needle bar 10 has a first limiting surface 11, and the first driving part further includes: the driving sleeve 23 is provided with a second limiting surface, the needle rod 10 penetrates through the driving sleeve 23, and the first limiting surface 11 is matched with the second limiting surface so as to prevent the needle rod 10 and the driving sleeve 23 from moving relatively in the circumferential direction; the driving wheel 22 is connected with the driving sleeve 23 to drive the needle bar 10 to rotate through the driving sleeve 23. The relative position of the needle bar 10 and the driving sleeve 23 in the circumferential direction can be fixed by the cooperation of the first limiting surface 11 and the second limiting surface, and then the driving sleeve 23 is driven by the driving wheel 22 to rotate, so that the needle bar 10 is rotated. Specifically, both the first stopper surface 11 and the second stopper surface may be provided as a plane.

In the present embodiment, the driving sleeve 23 includes: the sleeve body 231 is provided with the needle rod 10 penetrating through the sleeve body 231, the side wall of the sleeve body 231 is provided with a notch, and the first limiting surface 11 faces the notch; and the limiting block 232 is arranged at the notch, and the second limiting surface is positioned on the limiting block 232. Thus, the circumferential direction of the needle bar 10 can be limited by the limiting block 232. The arrangement mode has simple structure and is convenient to process. Specifically, the limiting block 232 can be connected to the sleeve 231 by screws. The needle bar can move up and down relative to the housing 231.

In this embodiment, the sewing machine further includes: the machine head 30, the first driving part and the second driving part are both arranged on the machine head 30; the driving sleeve 23 includes a sleeve body 231 and an attachment plate 233 provided below the sleeve body 231, the transmission wheel 22 is provided below the attachment plate 233, the needle shaft 10 passes through the sleeve body 231, the attachment plate 233 and the transmission wheel 22 in order, and the sleeve body 231 is rotatably provided in the lower side wall of the head 30. The provision of the cover 231 in the lower side wall of the head 30 makes it possible to make the overall structure of the sewing machine compact. The connecting plate 233 is provided to facilitate connection with the driving wheel 22 and to axially limit the sleeve 231. Further, an upper portion of the needle bar 10 is inserted into an upper sidewall of the head 30.

In this embodiment, the radial dimension of the connecting plate 233 is greater than the radial dimension of the sleeve 231, the connecting plate 233 is located below the lower sidewall, the upper portion of the sleeve 231 protrudes above the lower sidewall, and the first driving portion further includes: the fixing piece 24 and the fixing piece 24 are connected with the upper part of the sleeve body 231, the radial dimension of the fixing piece 24 is larger than that of the sleeve body 231, and the fixing piece 24 and the connecting plate 233 jointly limit the axial direction of the sleeve body 231. With the above arrangement, the fixing member 24 and the connecting plate 233 may be used to limit the axial direction of the sleeve body 231, so as to prevent the sleeve body 231 from moving in the axial direction.

Specifically, the upper portion of the case 231 has external threads, the fixing member 24 has internal threads, and the fixing member 24 is threadedly coupled to the case 231. The first driving section further includes: the upper thrust bearing 25 is arranged between the fixing piece 24 and the upper end face of the lower side wall, the lower thrust bearing 26 is arranged between the connecting plate 233 and the lower end face of the lower side wall, and the needle roller bearing 27 is arranged in the lower side wall and sleeved on the sleeve body 231.

As shown in fig. 4, a dust-proof sheet and a dust-proof spacer are provided below the transmission wheel 22. Can improve the leakproofness through above-mentioned setting, avoid impurity to get into to improve life.

In this embodiment, the first driving part further includes: and the driving wheel is in driving connection with the transmission belt 21, the driving wheel and the transmission wheel 22 are synchronous wheels, and the transmission belt 21 is a synchronous belt. The synchronous belt and the synchronous wheel are used for driving, so that the structure is simple, and the control is accurate.

In this embodiment, the second driving section includes: the limiting structure is connected with the needle rod 10; the needle bar 10 can rotate relative to the driving member 61, the driving member 61 is in limit fit with the limit structure to prevent the driving member 61 and the needle bar 10 from moving relatively in the axial direction, and the driving member 61 is arranged to move up and down to drive the needle bar 10 to lift. This allows the driving member 61 to lift and lower the needle bar 10, and the needle bar 10 can rotate relative to the driving member 61.

Specifically, the limiting structure comprises a limiting piece 62, the needle rod 10 passes through a through hole of the limiting piece 62, a notch communicated with the through hole of the limiting piece 62 is formed in the side wall of the limiting piece 62, and the width of the notch is adjustable; the two limiting members 62 are provided, the two limiting members 62 are arranged at intervals, and the driving member 61 is arranged between the two limiting members 62. In this way, the two axial directions of the driving member 61 can be limited by the two limiting members 62. Moreover, a notch is provided on the stopper 62 to facilitate attachment or detachment of the stopper 62 to the needle bar 10. The limiting member 62 is connected with a screw, and the size of the notch is adjusted by the screw.

Further, the second driving part further includes: the rotating shaft is connected with the driving part 61, the crank connecting rod mechanism is connected with the rotating shaft, and the driving part 61 can be driven to move up and down by the motion of the crank connecting rod mechanism.

By applying the technical scheme of the embodiment, the sewing machine is provided with the needle bar 10, the first driving part and the second driving part, wherein the first driving part can drive the needle bar 10 to rotate, and the second driving part can drive the needle bar 10 to lift. Since the needle bar 10 can rotate, the circumferential angle of the needle bar 10 can be adjusted during sewing, so that the needle bar 10 and the machine needle are more matched with the track, the sewing thread can be prevented from being wound on the machine needle or the needle bar 10, the sewing track can be consistent with the set pattern track, and the sewing efficiency and the quality of sewing patterns can be improved. Further, the thread introduced into the needle bar 10 is guided by the rotation of the rotary arm 71, and the rotary motion of the rotary arm 71 is matched with the vertical motion of the needle bar 10 to smoothly perform the sewing.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewing machine, comprising:

a needle bar (10);

the first driving part is in driving connection with the needle rod (10) to drive the needle rod (10) to rotate;

the second driving part is in driving connection with the needle rod (10) to drive the needle rod (10) to lift;

the thread take-up disc is arranged above the needle rod (10) and comprises a rotary arm (71) which is rotatably arranged, a thread passing hole for passing a thread is formed in the rotary arm (71), and the rotary arm (71) is used for guiding the thread entering the needle rod (10) from the thread passing hole.

2. The sewing machine according to claim 1, characterized in that the rotary arm (71) comprises:

an arm body (711), the arm body (711) being rotatable about a predetermined center line, the threading hole being provided on the arm body (711);

and an arc-shaped plate (712) arranged at one end of the arm body (711) far away from the preset central line.

3. The sewing machine of claim 2, wherein the take-up reel further comprises:

the static disc (72), the static disc (72) is a hollow structure;

the arc-shaped guard plate (73) is arranged at the edge of the static disc (72);

a rotating disc (74) rotatably disposed in the hollow area of the static disc (72), the rotating arm (71) is disposed on the rotating disc (74), and the rotating area of the rotating arm (71) is located in the outer periphery of the static disc (72).

4. Sewing machine as in claim 1, characterized in that said first driving portion comprises a belt (21) and a transmission wheel (22), said belt (21) being in driving connection with said transmission wheel (22), said transmission wheel (22) being in driving connection with said shank (10).

5. Sewing machine as in claim 4, characterized in that said needle bar (10) has, on its outer wall, a first stop face (11), said first drive portion further comprising:

the driving sleeve (23) is provided with a second limiting surface, the needle rod (10) penetrates through the driving sleeve (23), and the first limiting surface (11) is matched with the second limiting surface so as to prevent the needle rod (10) and the driving sleeve (23) from moving relatively in the circumferential direction;

the transmission wheel (22) is connected with the driving sleeve (23) so as to drive the needle rod (10) to rotate through the driving sleeve (23).

6. Sewing machine as in claim 5, characterized in that said driving sleeve (23) comprises:

the needle rod (10) penetrates through the sleeve body (231), a notch is formed in the side wall of the sleeve body (231), and the first limiting surface (11) faces towards the notch;

and the limiting block (232) is arranged at the notch, and the second limiting surface is positioned on the limiting block (232).

7. The sewing machine of claim 5, further comprising:

a handpiece (30), the first and second drive portions each being provided on the handpiece (30);

the driving sleeve (23) comprises a sleeve body (231) and a connecting plate (233) arranged below the sleeve body (231), the driving wheel (22) is arranged below the connecting plate (233), the needle rod (10) sequentially penetrates through the sleeve body (231), the connecting plate (233) and the driving wheel (22), and the sleeve body (231) is rotatably arranged in the lower side wall of the machine head (30).

8. The sewing machine according to claim 7, wherein the radial dimension of the attachment plate (233) is greater than the radial dimension of the cover (231), the attachment plate (233) is located below the lower sidewall, an upper portion of the cover (231) protrudes above the lower sidewall, and the first driving part further comprises:

the fixing piece (24), the fixing piece (24) with the upper portion of the cover body (231) is connected, the radial dimension of the fixing piece (24) is greater than the radial dimension of the cover body (231), and the fixing piece (24) and the connecting plate (233) are jointly limited in the axial direction of the cover body (231).

9. The sewing machine of claim 4, wherein the first drive portion further comprises:

the driving wheel is in driving connection with the transmission belt (21), the driving wheel and the transmission wheel (22) are synchronous wheels, and the transmission belt (21) is a synchronous belt.

10. The sewing machine of claim 1, wherein the second drive portion comprises:

the limiting structure is connected with the needle rod (10);

drive piece (61), needle bar (10) pass drive piece (61), needle bar (10) can be relative drive piece (61) rotate, drive piece (61) with spacing cooperation of limit structure is in order to stop drive piece (61) with relative movement takes place in the axial for needle bar (10), drive piece (61) can set up with moving up and down in order to drive needle bar (10) lift.

11. The sewing machine of claim 10,

the limiting structure comprises a limiting piece (62), the needle rod (10) penetrates through a through hole of the limiting piece (62), a notch communicated with the through hole of the limiting piece (62) is formed in the side wall of the limiting piece (62), and the width of the notch is adjustable;

the number of the limiting parts (62) is two, the two limiting parts (62) are arranged at intervals, and the driving part (61) is arranged between the two limiting parts (62).