CN214115912U

CN214115912U - Needle bar assembly and sewing machine

Info

Publication number: CN214115912U
Application number: CN202022606671.6U
Authority: CN
Inventors: 孙灵君; 李家银
Original assignee: Zhejiang Manyi Intelligent Technology Co ltd
Current assignee: Zhejiang Manyi Intelligent Technology Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-09-03
Anticipated expiration: 2030-11-12

Abstract

The utility model belongs to the technical field of the sewing machine technique and specifically relates to a needle bar subassembly and sewing machine are related to. The needle bar assembly comprises a first rod piece, a sewing machine needle bar, a first connecting piece and a first guide structure; the first rod piece is used for being connected with the take-up and cloth-stabbing mechanism; the first rod piece is fixedly connected with the first connecting piece; the first guide structure is used for guiding the movement of the first connecting piece; the sewing machine needle bar is axially limited on the first connecting piece, and the sewing machine needle bar can rotate around the axis of the sewing machine needle bar. The sewing machine comprises a thread-taking-up and cloth-stabbing mechanism and the needle rod assembly. The utility model discloses be favorable to guaranteeing that the stitch seam of sewing is unified, and then guarantee the aesthetic property of off-the-shelf outward appearance.

Description

Needle bar assembly and sewing machine

Technical Field

The utility model belongs to the technical field of the sewing machine technique and specifically relates to a needle bar subassembly and sewing machine are related to.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material.

In the sewing machine, a needle is arranged on a needle rod to realize sewing; however, different stitches are often produced during sewing, and the appearance of a finished product after sewing is not attractive due to the non-uniform stitches.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a needle bar subassembly and sewing machine to solve the existence among the prior art when sewing, often can produce different stitches, because the stitch is not unified, make the not pleasing to the eye technical problem of finished product outward appearance after the sewing.

In a first aspect, the present invention provides a needle bar assembly, comprising a first bar, a sewing machine needle bar, a first connecting member and a first guide structure; the first rod piece is used for being connected with the thread-taking-up and cloth-stabbing mechanism; the first rod piece is fixedly connected with the first connecting piece; the first guide structure is used for guiding the movement of the first connecting piece; the needle bar of the sewing machine is axially limited on the first connecting piece, and the needle bar of the sewing machine can rotate around the axis of the needle bar.

In an alternative embodiment, the first connecting member includes a guide portion and a bent portion; the part between the two ends of the bending part is connected with the guide part, and the two ends of the bending part are respectively provided with a first through hole and a second through hole; the first rod piece is arranged in the first through hole in a penetrating mode and is fixedly connected with the bending portion; the needle rod of the sewing machine penetrates through the second through hole, and the needle rod of the sewing machine is axially limited on the bent part through a limiting structure; the first guide structure is provided with a guide groove, and the guide part is in sliding fit with the guide groove.

In an alternative embodiment, the limit structure comprises an upper stop and a lower stop; the upper stop block and the lower stop block are respectively and fixedly connected with the needle bar of the sewing machine, and the bending part is positioned between the upper stop block and the lower stop block.

In an alternative embodiment, the first rod and the sewing machine needle bar are both hollow structures.

In a second aspect, the present invention provides a sewing machine comprising a take-up and stab-in mechanism and a needle bar assembly as defined in any of the preceding embodiments.

In an alternative embodiment, the thread take-up and stab-on mechanism comprises a first crank, a thread take-up assembly and a stab-on assembly, the thread take-up assembly comprises a thread take-up lever, and the stab-on assembly comprises a needle bar connecting rod and a needle bar joint; the take-up lever is pivoted with the eccentric hole of the first crank, the take-up lever is connected with the needle rod connecting rod through a second crank, and the needle rod connecting rod is pivoted with the needle rod joint; the needle bar joint is fixedly connected with the first rod piece.

In an optional embodiment, the thread take-up and stab-in mechanism further comprises a second guide structure, the second guide structure comprises a needle bar slider and a guide rail, the needle bar slider is fixedly connected with the needle bar joint, and the needle bar slider is slidably disposed in a sliding groove of the guide rail.

In an optional implementation manner, the crank further comprises a driving motor and a spindle, an output shaft of the driving motor is connected with the spindle through a coupling, and the spindle is fixedly connected with a central hole of the first crank.

In an optional embodiment, the thread take-up assembly further comprises a thread take-up link pivoted to the thread take-up lever.

In an alternative embodiment, the main shaft is sleeved with a first bearing and a second bearing.

The beneficial effects of the utility model mainly lie in:

in a first aspect, the present invention provides a needle bar assembly, including a first bar, a needle bar of a sewing machine, a first connecting member, and a first guide structure; the first rod piece is used for being connected with the take-up and cloth-stabbing mechanism; the first rod piece is fixedly connected with the first connecting piece; the first guide structure is used for guiding the movement of the first connecting piece; the sewing machine needle bar is axially limited on the first connecting piece, and the sewing machine needle bar can rotate around the axis of the sewing machine needle bar. After the first rod piece is connected with the take-up and stabbing mechanism and the take-up and stabbing mechanism moves, the first rod piece and the first connecting piece can move up and down under the guiding action of the first guiding structure, and the needle rod of the sewing machine is axially limited on the first connecting piece, so that the needle rod of the sewing machine can be driven to move up and down; when sewing, the needle bar of the sewing machine is rotated in time, thereby being beneficial to ensuring the uniformity of the sewing stitches and ensuring the aesthetic property of the appearance of the finished product.

In a second aspect, the present invention provides a sewing machine, comprising a take-up and stabbing mechanism and a needle bar assembly. Based on the analysis, the sewing machine is beneficial to ensuring the uniformity of the sewn stitches, and the appearance attractiveness of the finished product is ensured.

It is to be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily restrictive of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the disclosure. Together, the description and drawings serve to explain the principles of the disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a needle bar assembly provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first connecting member according to an embodiment of the present invention;

fig. 3 is a schematic view of a first guiding structure according to an embodiment of the present invention;

FIG. 4 is a schematic view of the needle bar assembly and the take-up and stab mechanism of the embodiment of the present invention assembled together;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 6 is a schematic structural view of a thread take-up and cloth-stabbing mechanism in an embodiment of the present invention;

FIG. 7 is a schematic structural view of a take-up and cloth-stabbing mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic view of the second crank and the thread take-up lever assembled together according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of the first crank in the embodiment of the present invention;

fig. 10 is a schematic structural view of the needle bar slider according to the embodiment of the present invention.

Icon:

101-a first bar; 102-needle bar of sewing machine; 103-a first connection; 104-a first guiding structure; 105-a guide; 106-a bend; 107-first via; 108-a second via; 109-a guide groove; 110-weight reduction grooves; 111-screws; 112-upper stop; 113-a lower stop; 114-an upper bushing; 115-lower shaft sleeve; 116-needle bar sleeve; 117-second crank; 201-a first crank; 202-take-up lever; 203-needle bar connecting rod; 204-needle bar joint; 205-eccentric hole; 206-a central hole; 207-pivot axis; 208-needle bar slide block; 209-guide rail; 210-open type retainer ring; 211-drive motor; 212-a main shaft; 213-a coupling; 214-take-up link; 215-a first bearing; 216-a second bearing; 217-ball bearing.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 to 3, an embodiment of the present invention provides a needle bar assembly, which includes a first rod 101, a sewing machine needle bar 102, a first connecting member 103, and a first guiding structure 104; the first rod 101 is used for connecting with the thread-taking-up and cloth-stabbing mechanism; the first rod 101 is fixedly connected with the first connecting piece 103; the first guide structure 104 is used for guiding the movement of the first connecting piece 103; the sewing machine needle bar 102 is axially limited on the first connecting piece 103, and the sewing machine needle bar 102 can rotate around the axis of the sewing machine needle bar 102. The axis of the first pin 101 and the axis of the sewing machine needle bar 102 may be arranged in parallel, the tip of the first pin 101 and the tip of the sewing machine needle bar 102 have a height difference, and the tip of the first pin 101 is higher than the tip of the sewing machine needle bar 102. The first rod 101 moves up and down through the thread-taking-up and cloth-stabbing mechanism; the first guiding structure 104 can guide the up-and-down movement of the first connecting member 103, that is, the up-and-down movement of the first rod 101 can be smooth, and the radial run-out of the first rod 101 can be reduced or avoided. In use, the needle may be mounted on the sewing machine needle bar 102.

It should be noted that the rotation of the needle bar 102 of the sewing machine can be realized by a driving device, and the driving device can include a motor or a cylinder; the motor may be a servo motor so that the driving means can rotate the needle bar 102 of the sewing machine by a set angle. The upper surface of the sewing machine needle rod 102 is provided with a plane which extends along the axial direction of the sewing machine, a guide sleeve can be sleeved on the sewing machine needle rod 102, the guide sleeve and the sewing machine needle rod 102 realize circumferential positioning through the plane, but the guide sleeve can slide axially with the sewing machine needle rod 102, so that the guide sleeve is driven to rotate by adopting modes such as a synchronous belt, a gear, a chain and the like when a power device such as a motor or an air cylinder and the like, and the sewing machine needle rod 102 is driven to rotate.

In the needle bar assembly provided by this embodiment, after the first rod 101 is connected to the thread-taking-up and cloth-stabbing mechanism and the thread-taking-up and cloth-stabbing mechanism moves, the first rod 101 and the first connecting member 103 can move up and down under the guiding action of the first guiding structure 104, and the needle bar 102 of the sewing machine is axially limited on the first connecting member 103, so that the needle bar 102 of the sewing machine can be driven to move up and down; when sewing, the sewing machine needle bar 102 is rotated in due time, thereby being beneficial to ensuring the uniformity of the sewing stitches and ensuring the appearance beauty of the finished product.

In an alternative of this embodiment, the first connecting member 103 includes a guide portion 105 and a bent portion 106; the part between the two ends of the bending part 106 is connected with the guide part 105, and the two ends of the bending part 106 are respectively provided with a first through hole 107 and a second through hole 108; the first rod 101 is arranged in the first through hole 107 in a penetrating manner, and the first rod 101 is fixedly connected with the bending part 106; the sewing machine needle bar 102 penetrates through the second through hole 108, and the sewing machine needle bar 102 is axially limited on the bending part 106 through a limiting structure; the first guiding structure 104 is provided with a guiding groove 109, and the guiding portion 105 is slidably engaged with the guiding groove 109. The use of the curved portion 106 can prevent the thread take-up lever 202 of the sewing machine from being affected, and in addition, the guide portion 105 is slidably fitted to the guide groove 109, which is advantageous in ensuring the stability of the up-and-down movement of the needle bar 102 of the sewing machine. Upper and lower opposite surfaces of the bent portion 106 have weight-reducing grooves 110. It should be noted that the guide slot 109 may be a dovetail slot, and the guide portion 105 may be a dovetail structure, so as to prevent the first connecting member 103 from being detached from the first guide structure 104.

Specifically, a first threaded hole is formed in a hole wall of the first through hole 107, and after the bottom end of the first rod 101 is inserted into the first through hole 107, the bottom end of the first rod 101 is locked by being mounted in the first threaded hole by using a screw 111, so that the first rod 101 is fixedly connected with the bending portion 106.

In an alternative scheme of the embodiment, the limiting structure comprises an upper stop block 112 and a lower stop block 113; the upper and

lower stoppers

112 and 113 are respectively fixedly connected to the needle bar 102 of the sewing machine, and the bending portion 106 is located between the upper and

lower stoppers

112 and 113. The axial limit of the sewing machine needle bar 102 on the bending part 106 is realized by adopting the cooperation of the upper stop block 112 and the lower stop block 113.

Specifically, the lower surface of the upper stop 112 and the upper surface of the curved portion 106 are both flat surfaces, and the upper surface of the lower stop 113 and the lower surface of the curved portion 106 are both flat surfaces, which is beneficial to the rotation of the sewing machine needle bar 102 and reduces the resistance force applied when the sewing machine needle bar 102 rotates. The upper stop block 112 and the lower stop block 113 are both sleeved on the sewing machine needle bar 102, and the upper stop block 112 and the lower stop block 113 are both locked on the sewing machine needle bar 102 by mounting screws 111.

In an alternative embodiment of this embodiment, the first rod 101 and the sewing machine needle bar 102 are both hollow. The first pin 101 has a hollow structure, which is advantageous for improving the strength of the first pin 101 and reducing the weight.

Specifically, the first rod 101 is sleeved with an upper bushing 114 and a lower bushing 115, respectively. The upper end of the sewing machine needle bar 102 is sleeved with a needle bar sleeve 116. The upper sleeve 114 and the lower sleeve 115 are sleeved on the first rod piece 101, and the needle bar sleeve 116 is sleeved on the needle bar 102 of the sewing machine. The upper and

lower bushings

114 and 115 guide the up-and-down movement of the first pin 101, and the pin bushing 116 guides the up-and-down movement of the sewing machine pin 102.

Example two

The embodiment two of the utility model provides a sewing machine, it includes the needle bar subassembly that take-up and sting cloth mechanism and embodiment one provided.

Referring to fig. 4 to 10, in an alternative of this embodiment, the thread take-up and stab-on mechanism includes a first crank 201, a thread take-up assembly including a thread take-up lever 202, and a stab-on assembly including a needle bar link 203 and a needle bar joint 204; the thread take-up lever 202 is pivoted with the eccentric hole 205 of the first crank 201, the thread take-up lever 202 is connected with the needle rod connecting rod 203 through the second crank 117, and the needle rod connecting rod 203 is pivoted with the needle rod joint 204; the needle bar connector 204 is fixedly connected to the first rod 101.

Specifically, the thread take-up lever 202 is pivotally connected to one end of the second crank 117, and the pivot shaft 207 between the thread take-up lever 202 and the second crank 117 shares a single axis with the pivot shaft 207 between the thread take-up lever 202 and the eccentric hole 205 of the first crank 201. The needle bar link 203 is pivotally connected to the second crank 117. When the first crank 201 rotates, the take-up lever 202 is driven to move; since the thread take-up lever 202 is connected to the needle bar link 203 via the second crank 117, the thread take-up lever 202 operates to drive the needle bar link 203 to operate, and the needle bar link 203 operates to drive the first lever 101 to move up and down.

In an alternative solution of this embodiment, the thread-picking and needling mechanism further includes a second guide structure, the second guide structure includes a needle bar slider 208 and a guide rail 209, the needle bar slider 208 is fixedly connected with the needle bar connector 204, and the needle bar slider 208 is slidably disposed in a sliding slot of the guide rail 209. The second guide structure is advantageous to ensure the stability of the up-and-down movement of the first rod 101. The needle bar connector 204 and the first rod member 101 may be fixedly connected by a split type fixing ring 210. An open type fixing ring 210 is located between the upper hub 114 and the lower hub 115.

In an optional scheme of this embodiment, the sewing machine further includes a driving motor 211 and a main shaft 212, an output shaft of the driving motor 211 is connected with the main shaft 212 through a coupling 213, and the main shaft 212 and the central hole 206 of the first crank 201 can be fixedly connected through a screw 111. The first crank 201 is powered by a drive motor 211.

Specifically, the driving motor 211 may be a servo motor. The driving motor 211 is installed in a cabinet of the sewing machine.

In an alternative of this embodiment, the thread take-up assembly further includes a thread take-up link 214, and the thread take-up link 214 is pivotally connected to the thread take-up lever 202.

In an alternative scheme of this embodiment, the main shaft 212 is sleeved with a first bearing 215 and a second bearing 216, the first bearing 215 and the second bearing 216 are used for providing support for the main shaft 212, and the outer ring of the first bearing 215 and the outer ring of the second bearing 216 can be fixed on a shell of the sewing machine. The upper hub 114, the lower hub 115 and the needle bar hub 116 may be fixed to a housing of the sewing machine.

The driving motor 211 drives the main shaft 212 to rotate, and drives the take-up and stab-in mechanism to move, and the take-up and stab-in mechanism simultaneously drives the first rod 101 and drives the sewing machine needle bar 102 to move linearly up and down through the first connecting member 103. The pivot shaft 207 between the thread take-up lever 202 and the first crank 201 is installed in the eccentric hole 205 of the first crank 201 and fixed by the screw 111. The ball bearing 217 is installed on the pivot shaft 207 between the thread take-up lever 202 and the first crank 201, and the thread take-up lever 202 is fixedly connected with the outer ring of the ball bearing 217, so that the thread take-up lever 202 and the first crank 201 can rotate relatively. The end of the needle bar joint is inserted into the mounting hole of the needle bar slider 208 and fixed by the screw 111. The guide rail 209 is fixed in the housing of the sewing machine.

In operation, the driving motor 211 rotates to drive the main shaft 212 to rotate synchronously via the coupling 213. The main shaft 212 drives the take-up lever 202 assembly to move through the first crank 201. A needle is mounted in the sewing machine needle bar 102. The thread penetrates into the thread hole of the thread take-up lever 202 to realize the function of taking-up and paying-off. The first rod member 101 makes a straight line motion reciprocating up and down and drives the needle bar 102 of the sewing machine to make a straight line motion reciprocating up and down synchronously, thereby realizing a cloth-needling function.

The sewing machine provided by the embodiment of the utility model can timely rotate the needle bar 102 of the sewing machine, thereby being beneficial to ensuring the uniformity of the sewing stitches and ensuring the aesthetic property of the appearance of the finished product; in addition, the vibration and noise of the whole sewing machine can be reduced, thereby ensuring the sewing quality. Particularly, when the rotating speed of the sewing machine reaches 2500rpm and above, the vibration and noise of the whole sewing machine can be still reduced, thereby ensuring the sewing quality.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention. In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.

Claims

1. A needle bar assembly, comprising a first bar, a sewing machine needle bar, a first connecting member and a first guide structure; the first rod piece is used for being connected with the thread-taking-up and cloth-stabbing mechanism; the first rod piece is fixedly connected with the first connecting piece; the first guide structure is used for guiding the movement of the first connecting piece; the needle bar of the sewing machine is axially limited on the first connecting piece, and the needle bar of the sewing machine can rotate around the axis of the needle bar.

2. The needle bar assembly as defined in claim 1, wherein the first connector includes a guide portion and a curved portion; the part between the two ends of the bending part is connected with the guide part, and the two ends of the bending part are respectively provided with a first through hole and a second through hole; the first rod piece is arranged in the first through hole in a penetrating mode and is fixedly connected with the bending portion; the needle rod of the sewing machine penetrates through the second through hole, and the needle rod of the sewing machine is axially limited on the bent part through a limiting structure; the first guide structure is provided with a guide groove, and the guide part is in sliding fit with the guide groove.

3. The needle bar assembly of claim 2, wherein the stop structure includes an upper stop and a lower stop; the upper stop block and the lower stop block are respectively and fixedly connected with the needle bar of the sewing machine, and the bending part is positioned between the upper stop block and the lower stop block.

4. A needle bar assembly as defined in any one of claims 1 to 3, wherein the first bar and the sewing machine needle bar are each of a hollow structure.

5. A sewing machine comprising a take-up and stab mechanism and a needle bar assembly as claimed in any of claims 1-4.

6. The sewing machine of claim 5, wherein the thread take-up and stab mechanism comprises a first crank, a thread take-up assembly and a stab assembly, the thread take-up assembly comprising a thread take-up lever, the stab assembly comprising a needle bar link and a needle bar joint; the take-up lever is pivoted with the eccentric hole of the first crank, the take-up lever is connected with the needle rod connecting rod through a second crank, and the needle rod connecting rod is pivoted with the needle rod joint; the needle bar joint is fixedly connected with the first rod piece.

7. The sewing machine of claim 6, wherein the take-up and stab mechanism further comprises a second guide structure, the second guide structure comprises a needle bar slider and a guide rail, the needle bar slider is fixedly connected with the needle bar joint, and the needle bar slider is slidably disposed in a sliding groove of the guide rail.

8. The sewing machine of claim 6, further comprising a driving motor and a main shaft, wherein an output shaft of the driving motor is connected with the main shaft through a coupler, and the main shaft is fixedly connected with the central hole of the first crank.

9. The sewing machine of any of claims 6-8, wherein the thread take-up assembly further comprises a thread take-up link pivotally coupled to the thread take-up lever.

10. The sewing machine of claim 8, wherein the main shaft is sleeved with a first bearing and a second bearing.