CN219603883U - Sewing machine - Google Patents

Abstract

The utility model provides a sewing machine, which comprises a first needle and a first rotating shuttle, wherein the first needle performs reciprocating linear motion along the vertical direction and is arranged in a swinging manner among a first initial position, a first swinging position and a second swinging position, and when the first needle is positioned at the first initial position, a first central line of the first needle extends along the vertical direction; the first rotating shuttle rotates around a first rotation center line along a first rotation direction, and the first rotation center line is arranged through a first preset vertical surface. Through when first needle is in first initial position, set up first central line and first vertical face interval of predetermineeing, first central line and first vertical face of predetermineeing set gradually along first direction of rotation this moment to solve among the prior art in needle horizontal hunting in-process, because the rotating shuttle point of sewing machine is different in the thread hooking position of needle recess, and lead to the problem that the thread loop size that needle and rotating shuttle formed is different.

Description

Sewing machine

Technical Field

The utility model relates to the field of sewing machines, in particular to a sewing machine.

Background

The sewing machine capable of driving the needle bar to swing is used for sewing patterns forming left and right stitches, such as buttonholes of shirts. The needle of the sewing machine is fixed on the needle bar, and the needle swings left and right along with the left and right swinging of the needle bar, so that the left and right stitches can be formed by the mutual matching of the needle and the rotating shuttle.

At present, in the assembling process of a sewing machine shell and a bottom plate, most sewing machines ensure that a main shaft hole and a lower shaft hole are in a vertical plane and are parallel to each other, wherein the main shaft hole is used for installing a main shaft with a motor needle for up-and-down movement, and the lower shaft hole is used for installing a lower shaft for driving a rotating shuttle to rotate.

However, the thread hooking position of the rotary shuttle point in the needle groove is inconsistent due to the left-right swing of the needle, so that the thread loop formed by the needle and the rotary shuttle is different in size when the needle rod swings left and right, the thread breakage is serious, and particularly when the knitted fabric is sewn, the thread loop formed by the needle and the rotary shuttle is more serious due to the fact that the elasticity of the fabric is large.

Disclosure of Invention

The main purpose of the utility model is to provide a sewing machine, which solves the problem that in the prior art, in the process of swinging a needle left and right, the thread hooking positions of the rotating shuttle tip of the sewing machine in the needle groove are different, so that the sizes of thread loops formed by the needle and the rotating shuttle are different.

In order to achieve the above object, the present utility model provides a sewing machine comprising: the first machine needle performs reciprocating linear motion along the vertical direction; the first machine needle can be arranged in a swinging way so as to be switched between a first initial position, a first swinging position and a second swinging position, when the first machine needle is in the first initial position, a first central line of the first machine needle extends along the vertical direction, and the first swinging position and the second swinging position are positioned on two opposite sides of the first initial position; the first rotating shuttle rotates around a first rotating center line along a first rotating direction, and the first rotating center line is arranged through a first preset vertical surface; when the first machine needle is in a first initial position, the first central line and a first preset vertical surface are arranged at intervals, and the first central line and the first preset vertical surface are sequentially arranged along a first rotation direction.

Further, when the first machine needle is at the first initial position, the first center line and the first preset vertical surface are arranged at a preset distance a; wherein the preset distance a is greater than or equal to 2mm and less than or equal to 8mm.

Further, when the first machine needle is at the first initial position, the first center line and the first preset vertical surface are arranged at a preset distance a; wherein the preset distance a is 3mm.

Further, the sewing machine further includes: the second driving shaft is rotatably arranged, and the first rotating shuttle is fixedly arranged on the second driving shaft so as to drive the first rotating shuttle to rotate through the second driving shaft; wherein the axis of the second drive shaft coincides with the first rotation center line.

Further, the sewing machine further includes: a first drive shaft rotatably disposed; the transmission assembly is connected with the first driving shaft and the first needle respectively, so that the first driving shaft drives the first needle to do reciprocating motion along the vertical direction through the transmission assembly; the axis of the first driving shaft is parallel to the axis of the second driving shaft, and the axis of the first driving shaft and the axis of the second driving shaft are arranged at intervals in the horizontal direction.

Further, when the first needle is at the first initial position, the axis of the first driving shaft intersects with the first central line and is perpendicular to the first central line.

Further, the sewing machine further includes: the casing has first mounting hole and second mounting hole, and first drive shaft wears to establish in first mounting hole, and the second drive shaft wears to establish in the second mounting hole, and the axis of first mounting hole is parallel and the two looks interval sets up in the horizontal direction with the axis of second mounting hole.

Further, the sewing machine further includes: a second driving member drivingly connected to the first driving shaft or the second driving shaft; the synchronous belt is sleeved on the first driving shaft and the second driving shaft so as to enable the first driving shaft and the second driving shaft to synchronously rotate.

Further, the transmission assembly includes: the needle bar is arranged in the extending direction of the first central line and is used for installing a first needle; and the crank connecting rod component is connected with the first driving shaft and the needle bar respectively, so that the crank connecting rod component converts the rotation motion of the first driving shaft into the reciprocation motion of the needle bar along the vertical direction.

Further, the transmission assembly further comprises: the needle bar is arranged in the extending direction of the first central line and is used for installing a first needle; the sewing machine further includes: and the swinging assembly is connected with the needle bar and is used for driving the needle bar to drive the first needle to swing.

By applying the technical scheme of the utility model, the sewing machine comprises a first needle and a first rotating shuttle, wherein the first needle performs reciprocating linear motion along the vertical direction and is arranged in a swinging manner among a first initial position, a first swinging position and a second swinging position, and when the first needle is positioned at the first initial position, a first central line of the first needle extends along the vertical direction; the first rotating shuttle rotates around a first rotation center line along a first rotation direction, and the first rotation center line is arranged through a first preset vertical surface. Through when first needle is in first initial position, set up first central line and first vertical face interval of predetermineeing, first central line and first vertical face of predetermineeing set gradually along first direction of rotation this moment to solve among the prior art in needle horizontal hunting in-process, because the rotating shuttle point of sewing machine is different in the thread hooking position of needle recess, and lead to the problem that the thread loop size that needle and rotating shuttle formed is different.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic view of the position between the needle and the rotating shuttle of a sewing machine according to the prior art;

FIG. 2 shows a schematic view of the position between the needle and the rotating shuttle of an embodiment of the sewing machine according to the utility model;

FIG. 3 is a schematic view showing the overall structure of an embodiment of a sewing machine according to the present utility model;

FIG. 4 shows an enlarged partial view at A of the sewing machine according to FIG. 3;

fig. 5 shows a partial enlarged view at B of the sewing machine according to fig. 3.

Wherein the above figures include the following reference numerals:

1. a first driving part; 2. a first drive shaft; 3. a crank link member; 4. a take-up lever assembly; 5. a needle bar connector; 6. a needle bar; 7. a support part; 8. a swinging connecting piece; 9. a first needle; 91. a first needle groove; 10. a synchronous belt; 11. a second drive shaft; 12. a first rotating shuttle; 121. a first rotary shuttle tip; 13. a first centerline; 14. a first rotation center line; 15. a first initial position; 16. a first swing position; 17. a second swing position; 100. a swing assembly; 200. a transmission assembly; 300. a bracket assembly;

9', a second needle; 91', a second needle groove; 12', a second rotating shuttle; 121', a second rotary shuttle tip; 13', a second centerline; 14', a second rotation centerline; 15', a second initial position; 16', a third swing position; 17', fourth swing position.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 2 to 5, the present utility model provides a sewing machine, comprising a first needle 9, wherein the first needle 9 performs reciprocating linear motion along a vertical direction for feeding a thread to an object to be sewn; for stitching a pattern with left and right stitches, the first needle 9 is swingably arranged to switch between a first initial position 15, a first swing position 16 and a second swing position 17, when the first needle 9 is in the first initial position 15, the first center line 13 of the first needle 9 extends in the vertical direction, the first swing position 16 and the second swing position 17 being located on opposite sides of the first initial position, so that the first needle 9 can send the stitches arranged thereon to different positions.

Further, in order to pick up the thread provided on the first needle 9, the sewing machine further includes a first rotating shuttle 12, the first rotating shuttle 12 rotating in a first rotation direction around a first rotation center line 14, the first rotation center line 14 being provided over a first preset vertical surface; when the first needle 9 is at the first initial position 15, the first center line 13 and the first preset vertical surface are arranged at intervals, the first center line 13 and the first preset vertical surface are sequentially arranged along the first rotation direction, and the first rotation direction is the clockwise rotation direction.

The sewing machine comprises a first needle 9 and a first rotating shuttle 12, wherein the first needle 9 performs reciprocating rectilinear motion along the vertical direction and is arranged in a swinging manner among a first initial position 15, a first swinging position 16 and a second swinging position 17, and when the first needle 9 is positioned at the first initial position 15, a first central line 13 of the first needle 9 extends along the vertical direction; the first rotating shuttle 12 rotates in a first rotational direction about a first rotational centerline 14, the first rotational centerline 14 being disposed across a first predetermined vertical plane. When the first needle 9 is at the first initial position 15, the first central line 13 and the first preset vertical surface are arranged at intervals, and at this time, the first central line 13 and the first preset vertical surface are sequentially arranged along the first rotation direction, so that the contact positions of the rotating shuttle and the needle are approximately the same in the process of swinging the needle left and right, and the problem that the sizes of the loops formed by the needle and the rotating shuttle are different due to the fact that the contact positions of the rotating shuttle and the needle of the sewing machine are different in the process of swinging the needle left and right in the prior art is solved.

Specifically, the first needle 9 includes a first needle groove 91 and a first thread passing port, the first thread passing port is disposed below the first needle groove 91, and the suture thread is fed out from the first thread passing port; the first rotary hook 12 includes a first rotary hook tip 121 for hooking the suture fed from the first thread passing opening. In the sewing process, the first needle 9 reciprocates and swings in the vertical direction, and meanwhile, the first rotating shuttle 12 drives the first rotating shuttle tip 121 to rotate, and after the first rotating shuttle tip 121 passes through the first needle groove 91, a suture fed out from the first thread passing opening is hooked.

As shown in fig. 1, the prior art sewing machine includes a second needle 9 'and a second rotary hook 12', the second needle 9 'having a second needle groove 91', the second rotary hook 12 'including a second rotary hook tip 121'. When the second needle 9 'is at the second initial position 15', the second center line 13 'of the second needle 9' extends along the vertical direction, the second rotating shuttle 12 'rotates around the second rotating center line 14' along the second rotating direction, the second rotating center line 14 'is arranged through a second preset vertical plane, and the second center line 13' coincides with the second preset vertical plane.

During the prior art sewing process, when the second needle 9 'swings to the second initial position 15', the second rotary shuttle point 121 'is approximately at 1/3 of the second needle groove 91'; when the second needle 9 'swings to the third swing position 16', the second shuttle point 121 'is approximately at the 4/9 position of the second needle groove 91'; when the second needle 9 'swings to the fourth swing position 17', the second shuttle point 121 'is located approximately at 1/6 of the second needle groove 91'. Since the second rotary shuttle point 121' is positioned at a different position of the second needle groove 91' during the swing of the second needle 9', the loop formed by sewing is different in size, thereby causing the suture to be broken.

In the sewing machine of the present embodiment, when the first needle 9 swings to the first initial position 15 during sewing, the first rotary shuttle point 121 is located at approximately 1/3 of the first needle groove 91; when the first needle 9 swings to the first swing position 16, the first shuttle point 121 is located approximately at 1/3 of the first needle groove 91; when the first needle 9 swings to the second swing position 17, the first shuttle point 121 is located approximately at 1/3 of the first needle groove 91. At this time, during the swinging process of the first needle 9, the first shuttle point 121 is located at the same position of the first needle groove 91, so the loops formed by the sewing machine are the same in size, so that the suture is not easy to break.

Optionally, in order that the contact position of the rotating shuttle and the needle is approximately the same in the process of swinging the first needle 9, the suture is not easy to break, and when the first needle 9 is at the first initial position 15, the first central line 13 is arranged at a preset distance a from a first preset vertical surface; wherein the preset distance a is greater than or equal to 2mm and less than or equal to 8mm.

Further, in order to further make the contact position of the rotating shuttle and the needle tend to be the same during the swinging process of the first needle 9, the sizes of the loops sewn by the sewing machine are approximately the same, and when the first needle 9 is at the first initial position 15, the first central line 13 and the first preset vertical surface are arranged at a preset distance a; wherein the preset distance a is greater than or equal to 2mm and less than or equal to 4mm.

Preferably, in order that the first rotary shuttle point 121 is at the same position of the first needle groove 91 during the swinging of the first needle 9, the first center line 13 is disposed at a preset distance a from a first preset vertical surface when the first needle 9 is at the first initial position 15; wherein the preset distance a is 3mm. At this time, the first shuttle point 121 is at the 1/3 position of the first needle groove 91 during the swing of the first needle 9.

In order to drive the first rotating shuttle 12 to rotate along the first rotation direction around the first rotation center line 14, the sewing machine further comprises a second driving shaft 11, the second driving shaft 11 is rotatably arranged, and the first rotating shuttle 12 is fixedly arranged on the second driving shaft 11 so as to drive the first rotating shuttle 12 to rotate through the second driving shaft 11; wherein the axis of the second drive shaft 11 coincides with the first rotation center line 14 such that the axis of the second drive shaft 11 is disposed beyond the first preset vertical plane.

In order to drive the first needle 9 to reciprocate in a straight line in a vertical direction, the sewing machine further includes a first driving shaft 2 and a transmission assembly 200, the first driving shaft 2 being rotatably provided; the first driving shaft 2 and the first needle 9 are respectively connected with the transmission assembly 200, so that the first driving shaft 2 drives the first needle 9 to reciprocate along the vertical direction through the transmission assembly 200; wherein, the axis of the first driving shaft 2 is parallel to the axis of the second driving shaft 11 and is arranged at intervals in the horizontal direction, and the interval distance is a preset interval a.

Specifically, when the first needle 9 is in the first initial position 15, the axis of the first drive shaft 2 intersects the first center line 13 and is disposed perpendicularly.

In order to make the axis of the first driving shaft 2 parallel to the axis of the second driving shaft 11 and spaced apart from each other in the horizontal direction, it is necessary to improve the relative positions of the first driving shaft 2 and the second driving shaft 11 during the assembly process of the sewing machine housing and the bottom plate, and the sewing machine further includes a housing having a first mounting hole and a second mounting hole. Wherein, first drive shaft 2 wears to establish in first mounting hole, and second drive shaft 11 wears to establish in the second mounting hole, and the axis of first mounting hole is parallel and the two looks interval sets up in the horizontal direction of axis of second mounting hole, and the interval distance is preset interval a for the lower left position of first mounting hole is in to the second mounting hole.

Further, in order to achieve synchronous rotation of the first drive shaft 2 and the second drive shaft 11, the sewing machine further comprises a second drive member and a timing belt 10, wherein the second drive member is in driving connection with the first drive shaft 2 or the second drive shaft 11; the synchronous belt 10 is sleeved on the first driving shaft 2 and the second driving shaft 11 so as to synchronously rotate the first driving shaft 2 and the second driving shaft 11, thereby enabling the first needle 9 and the first rotating shuttle 12 to cooperatively move.

Specifically, the specific implementation structure of the sewing machine in this embodiment is:

in one embodiment, a first end of the first drive shaft 2 is connected to the transmission assembly 200, and a second end of the first drive shaft 2 is drivingly connected to the second drive component; the first end of the second driving shaft 11 is connected with the first rotating shuttle 12, and the second end of the second driving shaft 11 and the second end of the first driving shaft 2 are sleeved with a synchronous belt 10. The arrangement is such that the second drive member drives the first drive shaft 2 in rotation while driving the timing belt 10 in rotation with the second drive shaft 11.

In another embodiment, a first end of the second driving shaft 11 is connected with the first rotating shuttle 12, and a second end of the second driving shaft 11 is in driving connection with the second driving component; the first end of the first driving shaft 2 is connected with the transmission assembly 200, and the second end of the first driving shaft 2 and the second end of the second driving shaft 11 are sleeved with the synchronous belt 10. The arrangement is such that the second drive member drives the second drive shaft 11 in rotation while driving the timing belt 10 in rotation with the first drive shaft 2.

As shown in fig. 3, the transmission assembly 200 in the present embodiment includes a needle bar 6 and a crank link member 3, wherein the needle bar 6 is disposed in an extending direction of a first center line 13 for mounting a first needle 9; the first drive shaft 2 and the needle bar 6 are connected to the crank link member 3, respectively, such that the crank link member 3 converts the rotational movement of the first drive shaft 2 into a reciprocating movement of the needle bar 6 in the vertical direction.

Preferably, the crank connecting rod part 3 is provided with a take-up lever assembly 4, a first end of the take-up lever assembly 4 is connected with the needle bar 6, and the other end of the take-up lever assembly is connected with the crank connecting rod part 3 so as to drive the needle bar 6 to reciprocate along the vertical direction.

Further, the transmission assembly 200 in the present embodiment further includes a needle bar 6 disposed in an extending direction of the first center line 13 for mounting the first needle 9; in order to make the first needle 9 swingably arranged to switch between the first initial position 15, the first swing position 16 and the second swing position 17, the sewing machine further comprises a swing assembly 100, wherein the swing assembly 100 is connected with the needle bar 6 for driving the needle bar 6 to swing the first needle 9.

The swing assembly 100 comprises a swing connecting piece 8 and a first driving part 1, wherein the swing connecting piece 8 is connected with the needle bar 6 to drive the needle bar 6 to swing; the first driving part 1 is connected with the swinging connecting piece 8 to drive the first needle 9 to swing.

As shown in fig. 4, the sewing machine in the present embodiment further includes a stand assembly 300, and in order to achieve the reciprocating rectilinear motion of the first needle 9 in the vertical direction, the stand assembly 300 includes the needle bar link 5 and the supporting portion 7 swingably provided between the first initial position 15, the first swing position 16 and the second swing position 17. Wherein, the first end of the needle bar connecting piece 5 is fixedly connected with the needle bar 6, and the second end of the needle bar connecting piece 5 is connected with the supporting part 7; the supporting part 7 is provided with a containing cavity, the top of the containing cavity is provided with a first penetrating hole, the bottom of the containing cavity is provided with a second penetrating hole corresponding to the first penetrating hole, the needle bar 6 is penetrated in the first penetrating hole and the second penetrating hole, the outer wall surface of the supporting part 7 is fixedly connected with the swinging connecting piece 8, and the supporting part 7 is driven to swing through the swinging connecting piece 8 so as to drive the needle bar 6 to swing.

Further, the needle bar connecting piece 5 is arranged in the accommodating cavity of the supporting part 7, a sliding groove is formed in the first inner wall surface of the accommodating cavity of the supporting part 7, and the second end of the needle bar connecting piece 5 is arranged in the sliding groove, so that the needle bar connecting piece 5 can slide along the vertical direction relative to the supporting part 7; the top of the supporting part 7 is provided with a penetrating opening, and the thread take-up lever component 4 penetrates through the penetrating opening and is fixedly connected with the needle bar connecting piece 5, so that the thread take-up lever component 4 drives the needle bar connecting piece 5 to move, and the needle bar 6 is driven to reciprocate along the vertical direction.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the sewing machine provided by the utility model changes the position relation between the second central line 13' of the second needle 9' and the second rotating shuttle 12' around the second rotating central line 14' when the sewing machine is at the second initial position 15' in the prior art into that: when the first needle 9 is at the first initial position 15, the first central line 13 and the first preset vertical surface where the first rotation central line 14 is located are arranged at intervals, the first central line 13 and the first preset vertical surface are sequentially arranged along the first rotation direction, the first rotation direction is clockwise, and the interval distance is a preset interval a, so that the first needle 9 swings, and the first rotary shuttle point 121 is located at the same position of the first needle groove 91, so that the loops formed by sewing by the sewing machine are identical in size, the suture is not easy to break, and the problem that in the process of swinging the needle left and right in the prior art, the loops formed by the needle and the rotary shuttle are different in size due to different hook positions of the rotary shuttle point of the sewing machine in the needle groove is solved.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A sewing machine, comprising:

the first machine needle (9) performs reciprocating linear motion along the vertical direction; the first needle (9) is arranged swingably to switch between a first initial position (15), a first swing position (16) and a second swing position (17), when the first needle (9) is in the first initial position (15), a first center line (13) of the first needle (9) extends in a vertical direction, the first swing position (16) and the second swing position (17) are located on opposite sides of the first initial position;

the first rotating shuttle (12), the first rotating shuttle (12) rotates along a first rotation direction around a first rotation center line (14), and the first rotation center line (14) is arranged through a first preset vertical surface; when the first machine needle (9) is located at the first initial position (15), the first central line (13) and the first preset vertical surface are arranged at intervals, and the first central line (13) and the first preset vertical surface are sequentially arranged along the first rotation direction.

2. The sewing machine of claim 1, wherein the first centerline (13) is disposed at a predetermined distance a from the first predetermined vertical surface when the first needle (9) is in the first initial position (15); wherein the preset distance a is greater than or equal to 2mm and less than or equal to 8mm.

3. The sewing machine of claim 1, wherein the first centerline (13) is disposed at a predetermined distance a from the first predetermined vertical surface when the first needle (9) is in the first initial position (15); wherein the preset distance a is 3mm.

4. A sewing machine as defined in any of claims 1-3, further comprising:

the second driving shaft (11) is rotatably arranged, and the first rotating shuttle (12) is fixedly arranged on the second driving shaft (11) so as to drive the first rotating shuttle (12) to rotate through the second driving shaft (11);

wherein the axis of the second drive shaft (11) coincides with the first rotation center line (14).

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

a first drive shaft (2) rotatably provided;

the first driving shaft (2) and the first needle (9) are respectively connected with the transmission assembly (200) so that the first driving shaft (2) drives the first needle (9) to reciprocate along the vertical direction through the transmission assembly (200);

wherein the axis of the first driving shaft (2) is parallel to the axis of the second driving shaft (11) and the axes are arranged at intervals in the horizontal direction.

6. A sewing machine according to claim 5, characterized in that the axis of the first drive shaft (2) intersects the first centre line (13) and is arranged perpendicularly when the first needle (9) is in the first initial position (15).

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

the casing has first mounting hole and second mounting hole, first drive shaft (2) wears to establish in the first mounting hole, second drive shaft (11) wears to establish in the second mounting hole, the axis of first mounting hole with the axis of second mounting hole is parallel and the two looks interval sets up in the horizontal direction.

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

a second drive member drivingly connected to the first drive shaft (2) or the second drive shaft (11);

and the synchronous belt (10) is sleeved on the first driving shaft (2) and the second driving shaft (11) so as to enable the first driving shaft (2) and the second driving shaft (11) to synchronously rotate.

9. The sewing machine of claim 5, wherein the transmission assembly (200) comprises:

a needle bar (6) arranged in the extending direction of the first center line (13) for mounting the first needle (9);

and the crank connecting rod part (3), the first driving shaft (2) and the needle bar (6) are respectively connected with the crank connecting rod part (3), so that the crank connecting rod part (3) converts the rotation motion of the first driving shaft (2) into the reciprocation motion of the needle bar (6) along the vertical direction.

10. The sewing machine of claim 5, wherein the transmission assembly (200) further comprises:

a needle bar (6) arranged in the extending direction of the first center line (13) for mounting the first needle (9);

the sewing machine further includes:

the swinging component (100) is connected with the needle bar (6) and is used for driving the needle bar (6) to drive the first needle (9) to swing.