CN210438938U

CN210438938U - Sewing machine

Info

Publication number: CN210438938U
Application number: CN201921001780.6U
Authority: CN
Inventors: 熊径武
Original assignee: Zhejiang Dole Sewing Machine Co ltd
Current assignee: Zhejiang Dole 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: the handpiece is provided with an accommodating cavity; the needle rod is movably arranged in the lower side wall of the machine head in a penetrating way, the upper end of the needle rod is positioned in the accommodating cavity, and the upper end of the needle rod is used for penetrating a suture; the first driving part is in driving connection with the needle rod to drive the needle rod to rotate on the machine head; the second driving part is in driving connection with the needle rod to drive the needle rod to lift on the machine head. 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. Moreover, the upper end of the needle rod is arranged in the accommodating cavity of the machine head, and the suture can penetrate into the needle rod in the accommodating cavity, so that the interference of other objects and the influence on the suture can be avoided, and the smooth sewing is ensured.

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: the handpiece is provided with an accommodating cavity; the needle rod is movably arranged in the lower side wall of the machine head in a penetrating way, the upper end of the needle rod is positioned in the accommodating cavity, and the upper end of the needle rod is used for penetrating a suture; the first driving part is in driving connection with the needle rod to drive the needle rod to rotate on the machine head; the second driving part is in driving connection with the needle rod to drive the needle rod to lift on the machine head.

Furthermore, the machine head is provided with a threading groove which is used for passing a suture thread which is threaded into the needle rod from the outside of the machine head.

Further, the sewing machine further includes: and the lead wire piece is arranged on the outer side wall of the machine head, a hole for passing the suture is formed in the lead wire piece, and the lead wire piece is used for guiding the suture which passes through the threading groove from the outside of the machine head.

Further, the sewing machine further includes: the take-up lever is movably arranged on the machine head and deviates from the axis of the needle rod.

Further, the second driving part includes: the limiting structure is connected with the needle rod; the needle bar is connected with the driving piece in a matched mode, the needle bar can rotate relative to the driving piece, the driving piece is in limit fit with the limiting structure to prevent the driving piece and the needle bar from moving axially relatively, and the driving piece can be arranged up and down to drive the needle bar to lift.

Further, limit structure includes: the first limiting piece is fixedly connected with the needle rod; the second limiting part is fixedly connected with the needle rod, the second limiting part and the first limiting part are arranged at intervals, at least one part of the driving part is arranged between the first limiting part and the second limiting part, and the first limiting part and the second limiting part are respectively in limit fit with the driving part.

Further, the sewing machine further includes: and the wire guide plate is arranged on the driving piece and is provided with a wire guide hole, and the wire guide hole is used for penetrating the suture to guide the suture entering the needle rod.

Further, the sewing machine further includes: the guide rod is movably arranged in the upper side wall of the machine head in a penetrating mode and is connected with the driving piece.

Furthermore, the driving piece comprises a first plate body, a second plate body and a third plate body, the second plate body is connected with the upper portion of the first plate body, the third plate body is connected with the lower portion of the first plate body, the upper portion of the needle rod penetrates through the third plate body, and the lower portion of the guide rod is connected with the second plate body.

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 so as to drive the needle rod to rotate.

Further, have first spacing face on the outer wall of needle bar, first drive division still includes: the driving sleeve is rotatably arranged on the lower side wall of the machine head and is provided with a second limiting surface, the needle rod is arranged in the driving sleeve in a penetrating way, 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 relatively in the circumferential direction; the driving wheel is connected with the driving sleeve to drive the needle rod to rotate through the driving sleeve.

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, 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. Moreover, the upper end of the needle rod is arranged in the accommodating cavity of the machine head, and the suture can penetrate into the needle rod in the accommodating cavity, so that the interference of other objects and the influence on the suture can be avoided, and the smooth sewing is ensured.

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 enlarged view of a portion of the sewing machine of FIG. 1;

FIG. 4 shows an assembly view of the needle bar of FIG. 1 with the first drive portion and the second drive portion;

fig. 5 shows an exploded view of a part of the first drive section of fig. 4.

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; 31. a threading slot; 40. a take-up lever; 61. a drive member; 611. a first plate body; 612. a second plate body; 613. a third plate body; 63. a first limit piece; 64. a second limiting member; 81. a lead member; 82. a wire guide plate; 83. a guide bar; 84. and (4) a sliding sleeve.

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 5, an embodiment of the present invention provides a sewing machine, including: a handpiece 30, the handpiece 30 having a receiving cavity; the needle bar 10 is movably arranged in the lower side wall of the machine head 30 in a penetrating way, the upper end of the needle bar 10 is positioned in the accommodating cavity, and the upper end of the needle bar 10 is used for penetrating a suture; the first driving part is in driving connection with the needle bar 10 to drive the needle bar 10 to rotate on the handpiece 30; a second driving part which is in driving connection with the needle bar 10 to drive the needle bar 10 to lift on the machine head 30.

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. Moreover, the upper end of the needle bar 10 is arranged in the accommodating cavity of the machine head 30, and the suture can penetrate into the needle bar 10 in the accommodating cavity, so that the interference of other objects and the influence on the suture can be avoided, and the smooth sewing is ensured.

As shown in fig. 3, in the present embodiment, a threading groove 31 is provided on the handpiece 30, and the threading groove 31 is used for passing a suture thread which is threaded into the needle bar 10 from the outside of the handpiece 30. The threading slot 31 is convenient for the suture outside the handpiece 30 to enter the accommodating cavity and to be threaded into the needle bar 10.

In this embodiment, the sewing machine further includes: and a lead member 81 provided on an outer sidewall of the handpiece 30, the lead member 81 having a hole for passing a suture therethrough, the lead member 81 guiding the suture passed through the threading groove 31 from the outside of the handpiece 30. The smooth movement of the suture is facilitated by the lead member 81, reducing resistance. Specifically, the lead 81 may be provided in a ring-like configuration and attached to the handpiece 30 by a fastener.

In this embodiment, the sewing machine further includes: the thread take-up lever 40 is movably arranged on the machine head 30, and the thread take-up lever 40 is arranged to deviate from the axis of the needle bar 10. The end of the thread take-up lever 40 is movable up and down in synchronization with the needle bar 10, and the thread take-up lever 40 has a hole through which a thread is inserted. Smooth sewing is achieved by the engagement of the thread take-up lever 40 with the needle bar 10. The suture passed out from the thread take-up lever 40 enters the thread guide 81 and then enters the threading groove 31.

In this embodiment, the second driving section includes: the limiting structure is connected with the needle rod 10; the needle bar 10 is connected with the driving component 61 in a matching way, the needle bar 10 can rotate relative to the driving component 61, the driving component 61 is in limit matching with a limit structure to prevent the driving component 61 and the needle bar 10 from moving relatively in the axial direction, and the driving component 61 is arranged in a vertically movable way 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, limit structure includes: the first limiting piece 63 is fixedly connected with the needle rod 10; the second limiting member 64, the second limiting member 64 is fixedly connected with the needle bar 10, the second limiting member 64 and the first limiting member 63 are arranged at intervals, at least a part of the driving member 61 is arranged between the first limiting member 63 and the second limiting member 64, and the first limiting member 63 and the second limiting member 64 are respectively in limit fit with the driving member 61. The first limiting member 63 and the second limiting member 64 can limit the driving member 61 in two directions. The first retaining member 63 is fixed to the needle bar 10 by a screw, and the second retaining member 64 has a notch whose tightness is adjusted by a screw.

In this embodiment, the sewing machine further includes: and a thread guide plate 82 provided on the driving member 61, the thread guide plate 82 having a thread guide hole for threading a thread to guide the thread entering the needle bar 10. The thread guide plate 82 can guide the thread to facilitate the thread to penetrate into the needle bar 10, and reduce the resistance to the thread to move smoothly.

In this embodiment, the sewing machine further includes: and the guide rod 83 is movably arranged in the upper side wall of the machine head 30 in a penetrating way, and the guide rod 83 is connected with the driving piece 61. The guide bar 83 moves up and down together with the needle bar 10, and the stability of the needle bar 10 during movement can be improved by the above arrangement, thereby improving sewing quality.

Specifically, the driving member 61 includes a first plate body 611, a second plate body 612, and a third plate body 613, the second plate body 612 is connected to an upper portion of the first plate body 611, the third plate body 613 is connected to a lower portion of the first plate body 611, an upper portion of the needle bar 10 passes through the third plate body 613, and a lower portion of the guide rod 83 is connected to the second plate body 612. With the above arrangement, it is convenient for both the needle bar 10 and the guide bar 83 to be connected to the driving member 61. Also, a gap is provided between the upper end of the needle shaft 10 and the second plate 612 to facilitate the threading of a suture.

Further, a lower portion of the guide rod 83 is penetrated in the first plate body 611, the first plate body 611 has a notch, the tightness of the notch can be adjusted by a screw, and the guide rod 83 is disposed coaxially with the needle bar 10. The sewing machine further includes a sliding bush 84, the sliding bush 84 is provided on the upper side wall of the head 30, and the guide rod 83 is inserted into the sliding bush 84. By providing the sliding bush 84, wear can be reduced, and the guide rod 83 can be moved smoothly.

In this embodiment, the first driving portion includes 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 to drive the needle bar 10 to rotate. 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 rotatably arranged on the lower side wall of the machine head 30, the driving sleeve 23 is provided with a second limiting surface, the needle rod 10 is arranged in the driving sleeve 23 in a penetrating way, 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 first driving portion and the second driving portion are both provided on the 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 rod 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.

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. A dustproof sheet and a dustproof gasket are arranged below the driving 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.

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 handpiece (30), the handpiece (30) having a receiving cavity;

the needle rod (10) is movably arranged in the lower side wall of the machine head (30) in a penetrating mode, the upper end of the needle rod (10) is located in the accommodating cavity, and a suture is inserted into the upper end of the needle rod (10);

the first driving part is in driving connection with the needle rod (10) to drive the needle rod (10) to rotate on the machine head (30);

the second driving part is in driving connection with the needle rod (10) to drive the needle rod (10) to lift on the machine head (30).

2. Sewing machine as in claim 1, characterized in that said head (30) is provided with a threading slot (31), said threading slot (31) being intended to pass a thread passing from the outside of said head (30) into said shank (10).

3. The sewing machine of claim 2, further comprising:

a thread guide member (81) provided on an outer sidewall of the handpiece (30), the thread guide member (81) having a hole for passing a thread therethrough, the thread guide member (81) guiding the thread passed through the thread passing groove (31) from the outside of the handpiece (30).

4. The sewing machine of claim 1, further comprising:

the take-up lever (40) is movably arranged on the machine head (30), and the take-up lever (40) is arranged by deviating from the axis of the needle rod (10).

5. 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) with drive piece (61) cooperation is connected, needle bar (10) can be relative drive piece (61) rotate, drive piece (61) with limit structure limit fit is in order to stop drive piece (61) with needle bar (10) take place relative movement in the axial, drive piece (61) can set up with driving with reciprocating needle bar (10) goes up and down.

6. The sewing machine of claim 5, wherein the limit structure comprises:

the first limiting part (63), the first limiting part (63) is fixedly connected with the needle rod (10);

the second limiting part (64), the second limiting part (64) with the needle bar (10) fixed connection, the second limiting part (64) with first limiting part (63) interval sets up, at least a part of driving piece (61) set up in first limiting part (63) with second limiting part (64) between, first limiting part (63) and second limiting part (64) respectively with driving piece (61) spacing cooperation.

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

the thread guide plate (82) is arranged on the driving piece (61), and the thread guide plate (82) is provided with a thread guide hole for penetrating a thread to guide the thread entering the needle rod (10).

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

the guide rod (83) is movably arranged in the upper side wall of the machine head (30) in a penetrating mode, and the guide rod (83) is connected with the driving piece (61).

9. The sewing machine according to claim 8, wherein the driving member (61) comprises a first plate body (611), a second plate body (612), and a third plate body (613), the second plate body (612) being connected to an upper portion of the first plate body (611), the third plate body (613) being connected to a lower portion of the first plate body (611), an upper portion of the needle bar (10) passing through the third plate body (613), and a lower portion of the guide rod (83) being connected to the second plate body (612).

10. The sewing machine of claim 1, wherein the first drive portion comprises a belt (21) and a drive wheel (22), the belt (21) being drivingly connected to the drive wheel (22), the drive wheel (22) being drivingly connected to the needle bar (10) for rotating the needle bar (10).

11. The sewing machine according to claim 10, characterized in that the outer wall of the needle bar (10) has a first limit surface (11), the first drive portion further comprising:

the driving sleeve (23) is rotatably arranged on the lower side wall of the machine head (30), the driving sleeve (23) is provided with a second limiting surface, the needle rod (10) is arranged in the driving sleeve (23) in a penetrating mode, 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).