CN210031074U - Zigzag sewing machine - Google Patents

Abstract

The utility model relates to a zigzag sewing machine, which comprises a lower tube seat, a lower shaft, a transmission mechanism and a rotating shuttle, wherein the lower shaft is connected with the transmission mechanism and rotates in the lower tube seat by taking the X-axis direction as the axis center, and the lower shaft can drive an outer kettle of the rotating shuttle to rotate by taking the Y-axis direction as the axis center through the transmission mechanism, wherein, the transmission mechanism comprises a rotating shuttle seat, a bearing and a transmission piece, the rotating shuttle seat is arranged in the Y-axis direction of the outer kettle and is provided with a penetrating part arranged in the outer kettle in sequence, a holding space is formed between the penetrating part and the outer kettle, the bearing is arranged in the holding space, in addition, the transmission piece is connected with the outer kettle, the transmission piece, the bearing and the penetrating part are arranged from the outside to the outside of the inner kettle and the outside the outer kettle in sequence, thereby, the assembling states of the rotating shuttle seat, the bearing, the outer kettle and the transmission piece can reduce the end volume of the lower tube seat along the, further, the zigzag sewing machine can perform the sewing operation of welt wrapping aiming at the shoes with smaller sizes.

Description

Zigzag sewing machine

Technical Field

The utility model relates to a can let the eedle carry out reciprocating swing and produce the tortuous sewing machine of tortuous stitch seam along perpendicular to pay-off direction, especially a can carry out the tortuous sewing machine of cylindric of sewing operation to the less shoe type of size.

Background

The sewing machine mainly combines a plurality of layers of sewing materials through sewing threads, and as the technology continuously evolves, the sewing machine on the market at present has a plurality of styles, while the sewing machine with different styles can be applied to the sewing operation of different sewing materials, wherein, a zigzag sewing machine which can generate zigzag stitches on the surface of shoes, bag-shaped materials or tubular materials through a swinging needle is available on the market at present.

Referring to fig. 1 and 2, a conventional zigzag sewing machine 1 includes a head 10 and a pillar 11, a lower tube seat 12 is formed below the pillar 11 and extends along an X-axis direction, as shown in the figure, an upper shaft 101 parallel to the X-axis and a swing mechanism 102 assembled to the upper shaft 101 are disposed inside the head 10, and the upper shaft 101 and the swing mechanism 102 are connected to a needle bar 103, wherein when the upper shaft 101 rotates around the X-axis direction, the upper shaft 101 drives a needle 104 assembled to the needle bar 103 to move up and down along the Z-axis, and at the same time, the swing mechanism 102 drives the needle 104 to swing back and forth with a set swing amplitude around the Y-axis direction through the rotating upper shaft 101, so that the needle 104 moves left and right along the X-axis, when the upper shaft 101 rotates, the upper shaft 101 can drive the needle 104 to move up and down along the Z-axis direction, and simultaneously, the device can move left and right alternately along the X-axis direction.

In addition, when the upper shaft 101 rotates, the upper shaft 101 drives the lower shaft 121 assembled in the lower tube seat 12 to rotate around the X-axis direction through the transmission shaft 111 assembled in the support 11, the lower tube holder 12 is provided with a transmission mechanism 122 mounted on the lower shaft 121, the transmission mechanism 122 can drive a rotating shuttle 13 to rotate around the axis of the Y-axis direction through the rotating lower shaft 121, as shown in fig. 3, the transmission mechanism 122 has a first belt pulley 122a and a second belt pulley 122b, the first belt pulley 122a is assembled on the lower shaft 121 through a gear set 122c, and is assembled on the second belt pulley 122b through a transmission belt 122d, and the second pulley 122b is arranged in the Y-axis direction of the rotary hook 13, and a ball bearing 122e is installed at a side close to the rotary hook 13, the ball bearing 122e is connected to the rotary hook 13 at a side away from the second pulley 122 b.

However, when the second pulley 122b of the transmission mechanism 122, the ball bearing 122e of the transmission mechanism 122 and the rotary hook 13 are assembled with each other, the ball bearing 122e and the second pulley 122b are sequentially arranged in the Y-axis direction of the rotary hook 13, so that the ball bearing 122e, the second pulley 122b and the rotary hook 13 are arranged in series along the Y-axis direction, and further the Y-axis direction of the lower tube base 12 must have a sufficient front-back length to accommodate the ball bearing 122e, the second pulley 122b and the rotary hook 13 at the same time, so that the zigzag sewing machine 1 in the prior art cannot perform the sewing operation of covering the shoe opening of the shoe with respect to the shoe shape with a small size under the condition that the front-back length of the lower tube base 12 is large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at improvement drive mechanism's structural component lets the structure appearance that four mutual equipment of rotating shuttle seat, bearing, outer cauldron and driving medium present can reduce the length around the Y axle direction, lets down partly ability of body and reduce the volume along the Y axle direction, and then tortuous sewing machine can carry out the sewing operation that the welt was covered to the welt to the less shoe type of size.

In order to achieve the above object, the present invention relates to a zigzag sewing machine, which has a needle capable of oscillating in a reciprocating manner along an X-axis direction and a lower bobbin base formed by extending in the X-axis direction, wherein a lower bobbin base is provided inside the lower bobbin base, and the lower bobbin base is connected to an outer pot via a transmission mechanism so as to rotate about an axis of the Y-axis.

The transmission mechanism includes: the rotary shuttle seat is arranged in the Y-axis direction of the outer kettle and is provided with a connecting part connected with the lower tube seat and a penetrating part arranged inside the outer kettle, a containing space positioned inside the outer kettle is arranged between the penetrating part and the outer kettle, the bearing is positioned in the containing space and is in contact with the outer diameter of the penetrating part and the inner diameter of the outer kettle, in addition, the first transmission part can drive the outer kettle to rotate and is connected with the outside of the outer kettle, so that the first transmission part, the bearing and the penetrating part are sequentially arranged from outside to inside.

The rotating shuttle seat forms a through passage which passes through the connecting part and the penetrating part, and the through passage is communicated with the inside of the outer kettle.

The rotating shuttle seat is further provided with a first connecting body connected to the lower tube seat and a second connecting body positioned in the outer kettle, the first connecting body and the second connecting body are respectively provided with a first contact surface and a second contact surface which can be contacted with the outer kettle, a first adjusting component is arranged between the first connecting body and the second connecting body and used for adjusting a gap between the second connecting body and the outer kettle in the Y-axis direction, so that the second connecting body is close to or away from the first connecting body in the Y-axis direction through the first adjusting component, the space size of the accommodating space in the Y-axis direction can be synchronously adjusted, and the first contact surface and the second contact surface can jointly prevent the outer kettle from moving along the Y-axis.

In a preferred embodiment, the first connecting body has a first lower connecting column contacting the bearing and a first upper connecting column having the first contact surface, the second connecting body is provided with a second lower connecting column provided with the second contact surface and a second upper connecting column connected with the first lower connecting column through the first adjusting component, the first lower connecting column, the second lower connecting column and the second upper connecting column together form the penetrating part, so that the first upper connecting column alone forms the connecting part, wherein the first connecting body is further provided with a through hole for accommodating the second upper connecting column, a limiting piece is arranged inside the through hole, the limiting part is spirally embedded in the through hole and contacts with the second connecting column, and the limiting part is provided with an accommodating groove for accommodating the oil cotton.

In addition, a second adjusting assembly is arranged between the connecting part and the lower pipe seat and is used for enabling the rotating shuttle seat to move in the Y-axis direction relative to the lower pipe seat so that the rotating shuttle seat can drive the outer kettle to selectively approach or separate from the lower pipe seat.

Furthermore, the transmission mechanism further comprises a second transmission piece capable of driving the first transmission piece to rotate and a driven component positioned in the Y-axis direction of the second transmission piece, the second transmission piece is positioned in the X-axis direction of the first transmission piece, and one end of the driven component is connected with the second transmission component, and one end far away from the outer kettle is connected with the lower shaft, the transmission mechanism further comprises a third transmission piece positioned between the first transmission piece and the second transmission piece, the third transmission piece is meshed with the first transmission piece and the second transmission piece simultaneously, so that meshing gaps are formed between the first transmission piece and the third transmission piece and between the second transmission piece and the third transmission piece, and the third transmission piece is movably assembled on the lower tube seat, so that the third transmission piece can move relative to the lower tube seat to adjust the size of the gap of the meshing gap.

The utility model discloses a characteristics lie in that the rotating shuttle seat is arranged in the Y axle direction of rotating shuttle to, the connecting portion of rotating shuttle seat are connected in the bottom tube seat, and the portion of wearing to establish of rotating shuttle seat sets up in the inside of outer cauldron, make to wear to establish and be equipped with the accommodation space that is located outer cauldron inside between portion and the outer cauldron, and the bearing is located the accommodation space, let the bearing surround and locate the portion of wearing to establish, and, the driving medium is connected in the outside of outer cauldron, makes first transmission piece, bearing and the portion of wearing to establish three are arranged according to the preface by the outside of outer cauldron towards the inside of outer cauldron, by this, rotating shuttle seat, bearing, outer cauldron and the structure appearance that four mutual equipment of driving medium present can reduce the length around the Y axle direction, let the partial volume of bottom tube seat can reduce along Y axle direction, and then the sewing operation that the tortuous can carry out welt to the less shoe type of size.

Drawings

FIG. 1 is a schematic view of a prior art zigzag sewing machine;

FIG. 2 is a schematic view of the internal components of a prior art zigzag sewing machine;

FIG. 3 is a schematic view of the rotary shuttle of FIG. 2 mounted to a drive mechanism;

FIG. 4 is a schematic view of the zigzag sewing machine of the present invention;

FIG. 5 is a schematic view of the internal components of the zigzag sewing machine of the present invention;

fig. 6 is an exploded view of the transmission mechanism of the present invention;

fig. 7 is a sectional view of the transmission mechanism of the present invention;

fig. 8 is a schematic view illustrating the first adjusting assembly adjusting the size of the accommodating space;

FIG. 9 is a schematic view of the shuttle seat being movable relative to the lower tube base by a second adjustment assembly;

FIG. 10 is a schematic view of the engagement of the first, second and third driving members;

FIG. 11 is a schematic view of the bearing inside the first transmission member;

fig. 12 is a schematic view of the third transmission member being moved to change the gap size of the engagement gap.

Description of reference numerals: 1-existing zigzag sewing machines; 10-vehicle head; 101-upper shaft; 102-a swing mechanism; 103-needle bar; 104-a needle; 11-a pillar; 111-a drive shaft; 12-a lower tube seat; 121-lower shaft; 122-a transmission mechanism; 122 a-a first pulley; 122 b-a second pulley; 122 c-gear set; 122 d-a drive belt; 122 e-ball bearings; 13-rotating shuttle; 2-zigzag sewing machine; 20-body; 21-vehicle head; 22-a pillar; 23-an upper shaft; 24-needle bar; 25-machine needle; 26-a swing mechanism; 27-a drive shaft; 28-lower tube seat; 281-a support part; 282-a stitching portion; 283-an elongated through hole; 29-lower shaft; 30-a transmission mechanism; 31-a rotating shuttle seat; 31 a-a penetration portion; 31 b-a connecting portion; 31 c-a through channel; 311-a first connection body; 311 a-a first lower connecting column; 311 b-a first upper connecting column; 311 c-first via; 311 d-first contact surface; 312-a second connection body; 312 a-a second lower connecting column; 312 b-a second upper connecting post; 312c — a second via; 312 d-second contact surface; 313-a first adjustment assembly; 313 a-first internal thread; 313 b-a first external thread; 314-a second adjustment component; 314 a-second internal thread; 314 b-second external thread; 315-a limiter; 315 a-a housing groove; 316-locking piece; 32-a bearing; 321-a needle roller retainer; 322-rolling needle; 33-a transmission assembly; 331-a first transmission; 332-a second transmission; 333-a third transmission member; 34-a driven assembly; 341-a first pulley; 342-a second pulley; 343-gear set; 344-a drive belt; 40-rotating shuttle; 41-outer kettle; 411 — first assembly; 412-a second assembly; 42-inner kettle; s-an accommodating space; t-clearance of engagement.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings, the advantages and features of which will become more apparent as the description proceeds.

Referring to fig. 4 and 5, the zigzag sewing machine 2 of the present invention has a body 20, the body 20 has a head 21 and a pillar 22, the head 21 has an upper shaft 23 parallel to the X axis inside, and the upper shaft 23 is connected to a needle bar 24 assembled to the head 21, when the upper shaft 23 rotates with the X axis as an axis, the upper shaft 23 can drive the needle bar 24 to move up and down along the Z axis direction, so that a needle 25 connected to the needle bar 24 synchronously reciprocates along the Z axis direction, as shown in the figure, the needle bar 24 is installed with a swing mechanism 26 located inside the head 21, the swing mechanism 26 is connected to the upper shaft 23, and can drive the needle 25 to reciprocate with a preset swing range with the Y axis as an axis through the rotating upper shaft 23, so that the needle 25 can move left and right along the X axis, thereby, when the upper shaft 23 rotates, the upper shaft 23 can drive the needle 25 to move up and down along the Z-axis direction and can also move left and right alternately along the X-axis direction.

The support column 22 has a transmission shaft 27 connected to the upper shaft 23 inside, the support column 22 extends along the X-axis direction to form a lower tube seat 28 under the head 21, as shown in the figure, the lower tube seat 28 has a supporting portion 281 combined with the support column 22 and a sewing portion 282 formed on the supporting portion 281, the supporting portion 281 has a lower shaft 29 connected to the transmission shaft 27 inside, and the front-back length of the sewing portion 282 in the Y-axis direction is smaller than the front-back length of the supporting portion 281 in the Y-axis direction, wherein the lower shaft 29 is parallel to the X-axis and is driven by the transmission shaft 27 to rotate around the X-axis direction, the lower shaft 29 is connected to a transmission mechanism 30 simultaneously located inside the supporting portion 281 and inside the sewing portion 282, and the transmission mechanism 30 is connected to a rotary shuttle 40 located inside the sewing portion 282, please refer to fig. 6 and 7, the rotary shuttle 40 has an outer pot 41 capable of rotating and an inner pot 42 limited in rotating, the outer kettle 41 can rotate around the Y-axis, and a first assembly portion 411 and a second assembly portion 412 are formed on two opposite sides of the outer kettle 41, respectively, as shown in the figure, the first assembly portion 411 is connected to the transmission mechanism 30, and the inner kettle 42 is installed inside the second assembly portion 412, so that when the lower shaft 29 is driven by the transmission shaft 27 to rotate around the X-axis, the lower shaft 29 can drive the outer kettle 41 to rotate around the Y-axis via the transmission mechanism 30.

Referring to fig. 6 and 7, the transmission mechanism 30 mainly includes a rotating shuttle seat 31, a bearing 32, a transmission component 33 and a driven component 34, the rotating shuttle seat 31 is arranged in the Y-axis direction of the rotating shuttle 40 and has a first connection body 311 far from the rotating shuttle 40, a second connection body 312 close to the rotating shuttle 40, a first adjustment component 313 between the first connection body 311 and the second connection body 312 and a second adjustment component 314 between the first connection body 311 and the lower tube seat 28, a portion of the first connection body 311 forms a first lower connection column 311a, and the remaining portion of the first connection body 311 forms a first upper connection column 311b forming the first lower connection column 311a, and the first connection body 311 forms a first through hole 311c, wherein the overall volume of the first connection column 311a is smaller than the internal space of the first assembly portion 411, the end surface of the first upper connection post 311b near the first lower connection post 311a is a first contact surface 311d facing the second connection body 312, in addition, a part of the second connection body 312 forms a second lower connection post 312a, the remaining part of the second connection body 312 forms a second upper connection post 312b formed on the second lower connection post 312a, and the second connection body 312 forms a second through hole 312c, and the end surface of the second lower connection post 312a near the second upper connection post 312b is provided with a second contact surface 312d facing the first connection body 311.

In this embodiment, the normal directions of the first contact surface 311d of the first connecting body 311 and the second contact surface 312d of the second connecting body 312 are parallel to the Y axis, and the first contact surface 311d and the second contact surface 312d can be in contact with the first assembly portion 411 of the outer pot 41 together, so that the first contact surface 311d and the second contact surface 312d prevent the outer pot 41 from moving along the Y axis together.

As shown in the drawings, the first adjusting member 313 has a first internal thread 313a and a first external thread 313b which are engaged with each other, the first internal thread 313a is formed at the first lower connection post 311a of the first connection body 311 and is positioned inside the first through hole 311c of the first connection body 311, and the first external thread 313b is formed at the second upper connection post 312b of the second connection body 312 and is positioned outside the second upper connection post 312b, wherein when the first internal thread 313a is combined with the first external thread 313b, the second connection body 312 can be rotated and can be connected to the first connection body 311 through the first adjusting member 313, the second upper connection post 312b is positioned inside the first through hole 311c, however, when both the second connection body 312 and the first connection body 311 are connected to each other through the first adjusting member 313, the first lower connection post 311a, the first connection post 311b, The second lower connecting column 312a and the second upper connecting column 312b together form a penetrating portion 31a, the first upper connecting column 311b of the first connecting body 311 forms a connecting portion 31b alone, the penetrating portion 31a penetrates and connects to the inside of the first assembling portion 411 of the outer pot 41, the inside of the first assembling portion 411 forms an accommodating space S between the periphery of the first lower connecting column 311a and the inner diameter of the first assembling portion 411, the accommodating space S surrounds the penetrating portion 31a, and the first through hole 311c of the first connecting body 311 and the second through hole 312c of the second connecting body 312 together form a penetrating channel 31c penetrating through the penetrating portion 31a and the connecting portion 31b, and the penetrating channel 31c communicates with the inside of the second assembling portion 412 of the outer pot 41, whereby a sewing person can inject the lubricating oil into the inside of the penetrating channel 31c, and the lubricating oil can flow into the inside of the second assembling portion 412 through the penetrating channel 31c, in this embodiment, a limiting member 315 located inside the first through hole 311c is disposed inside the through channel 31c, the limiting member 315 is spirally embedded in the first through hole 311c of the first connecting body 311, and the limiting member 315 contacts with the second upper connecting column 312b of the second connecting body 312, so that the limiting member 315 can limit the second connecting body 312 from generating displacement in the Y-axis direction through the first adjusting member 313, wherein the limiting member 315 is provided with a receiving groove 315a for receiving the oil cotton, and the receiving groove 315a is communicated with the through channel 31 c.

Referring to fig. 8, since the second connecting body 312 of the rotating shuttle seat 31 is connected to the first connecting body 311 of the rotating shuttle seat 31 by the first internal thread 313a being engaged with the first external thread 313b, so that the second connecting body 312 moves back and forth along the Y-axis when the second connecting body 312 rotates around the Y-axis as the axis, in this embodiment, when the second connecting body 312 rotates counterclockwise, the second connecting body 312 can be separated from the first connecting body 311 along the Y-axis, so that the front and rear length of the rotating shuttle seat 31 as a whole in the Y-axis direction can be increased, and further the space size of the accommodating space S can be increased along the Y-axis direction, meanwhile, the gap between the second contact surface 312d of the second connecting body 312 and the first assembling portion 411 of the outer pot 41 in the Y-axis direction can be increased, otherwise, when the second connecting body 312 rotates clockwise, the second connection body 312 can be close to the first connection body 311 along the Y axis, so that the overall length of the rotating shuttle seat 31 in the Y axis direction can be reduced, the accommodating space S can be reduced along the Y axis direction, and meanwhile, the gap between the second contact surface 312d and the first assembly portion 411 in the Y axis direction can be reduced, so that the first adjusting component 313 can be used for adjusting the length of the rotating shuttle seat 31 in the Y axis direction, and further, the gap between the first contact surface 311d and the first assembly portion 411 and the second contact surface 312d can be adjusted to prevent the outer kettle 41 from moving along the Y axis.

Referring to fig. 6 and 7, the second adjusting component 314 has a second internal thread 314a and a second external thread 314b that are engaged with each other, the second internal thread 314a is formed on the sewing portion 282 of the lower tube seat 28, and the second external thread 314b is formed on the first upper connection column 311b of the first connection body 311 and is located on the outer diameter of the first upper connection column 311b, wherein when the second internal thread 314a and the second external thread 314b are combined with each other, a partial section of the connection portion 31b protruding out of the sewing portion 282 can be engaged with a locking component 316 that is a nut, and the locking component 316 can prevent the first connection body 311 from moving back and forth along the Y axis through the second adjusting component 314 under the condition that the outer kettle 41 of the rotating shuttle 40 rotates about the Y axis.

Referring to fig. 9, since the first connecting body 311 of the rotating shuttle 31 is connected to the sewing portion 282 of the lower tube seat 28 by the second internal thread 314a being engaged with the second external thread 314b, when the connecting portion 31b rotates around the Y axis, the whole rotating shuttle seat 31 moves back and forth along the Y axis, in this embodiment, when the first connecting body 311 rotates counterclockwise around the Y axis, the whole rotating shuttle seat 31 moves forward along the Y axis, so that the rotating shuttle seat 31 can drive the outer vessel 41 to move away from the lower tube seat 28, otherwise, when the first connecting body 311 rotates clockwise around the Y-axis, the whole rotating shuttle seat 31 moves backward along the Y-axis, so that the rotating shuttle seat 31 can drive the outer kettle 41 to be close to the lower tube seat 28, thereby the second adjusting component 314 enables the rotating shuttle seat 31 to move back and forth relative to the lower tube seat 28, and enables the rotating shuttle 40 to be adjusted to the front and back positions aligned with the needle 25.

Referring to fig. 6 and 7, the bearing 32 is located inside the receiving space S, such that the bearing 32 is also located inside the first assembling portion 411 of the outer pot 41, the bearing 32 surrounds the penetrating portion 31a of the rotating shuttle seat 31 and is arranged in the Y-axis direction of the rotating shuttle 40, in this embodiment, the bearing 32 is a radial needle bearing 32 and has a needle roller holder 321 presenting a hollow column shape, the needle roller holder 321 is provided with a plurality of freely rotatable needle rollers 322, each needle roller 322 is in line contact with the inner diameter of the first assembling portion 411 and the outer diameter of the first lower connecting pillar 311a at the same time, thereby, the structural mode that the rotating shuttle seat 31 is connected to the rotating shuttle 40 enables the bearing 32 to be located inside the first assembling portion 411 of the outer pot 41, such that the structural mode that the rotating shuttle seat 31, the bearing 32 and the outer pot 41 are assembled with each other can reduce the front-rear length in the Y-axis direction, and the seam portion 282 can reduce the volume in the Y-axis direction, and then the zigzag sewing machine 2 can carry out the sewing operation of the welt edge covering for the shoe type with smaller size.

Referring to fig. 6, 7, 10 and 11, the transmission assembly 33 has three transmission members, one of the transmission members is a gear to form a first transmission member 331 located in the seam portion 282, the first transmission member 331 is arranged in the Y-axis direction of the rotary shuttle 40 and is sleeved and fixed outside the first assembling portion 411 of the outer kettle 41, so that the first transmission member 331, the first assembling portion 411 of the outer kettle 41, the bearing 32 and the penetrating portion 31a of the rotary shuttle seat 31 are sequentially arranged from the outside of the first assembling portion 411 to the inside of the first assembling portion 411, and further the first assembling portion 411 and the bearing 32 are both located inside the first transmission member 331, while the other transmission member is also a gear to form a second transmission member 332 located in the supporting portion 281, the second transmission member 332 is arranged at intervals in the X-axis direction of the first transmission member 331 and is assembled to the driven member 34, so that the second transmission member 332 is driven by the driven member 34 to drive the first transmission member 331 to rotate, the last transmission element is also designed as a gear to form a third transmission element 333 located between the first transmission element 331 and the second transmission element 332, the third transmission element 333 is movably assembled in an elongated through hole 283 formed in the lower tube seat 28, so that the third transmission element 333 can adjust the fixed position of the axis thereof in the elongated through hole 283, and the third transmission element 333 is engaged with the first transmission element 331 and the second transmission element 332 at the same time, so that an engagement gap T is formed between the first transmission element 331 and the third transmission element 333 and between the second transmission element 332 and the third transmission element 333.

Referring to fig. 10 and 12, the height positions of the first transmission member 331, the second transmission member 332 and the third transmission member 333 are different, such that the center points of the first transmission member 331, the second transmission member 332 and the third transmission member 333 are not arranged on the same straight line, wherein the third transmission member 333 is movably assembled in the elongated through hole 283 of the lower tube seat 28, such that the third transmission member 333 can be simultaneously far away from or close to the first and second transmission members 331, 332 to change the gap size of the engagement gap T, as shown in fig. 10, the third transmission member 333 is assembled in the central section of the elongated through hole 283, such that the third transmission member 333 is close to the first and second transmission members 331, 332, such that the gap size of the engagement gap T can be reduced, otherwise, as shown in fig. 12, the third transmission member 333 is assembled at the end of the elongated through hole 283, such that the third transmission member 333 is far away from the first and second transmission members 331, 333, 332, the gap size of the engagement gap T can be enlarged, and therefore, the fixing position of the third transmission member 333 in the elongated through hole 283 can be changed to adjust the proper engagement gap T.

Referring to fig. 6 and 7, the driven assembly 34 is located in the supporting portion 281 of the lower tube seat 28, and has a first pulley 341 and a second pulley 342, the first pulley 341 is assembled to the lower shaft 29 through a gear set 343 and connected to the second pulley 342 through a transmission belt 344, the second pulley 342 is arranged in the Y-axis direction of the second transmission member 332 and connected to the second transmission member 332, in this embodiment, when the upper shaft 23 rotates around the X-axis direction, the upper shaft 23 drives the lower shaft 29 to rotate around the X-axis direction through the transmission shaft 27, the lower shaft 29 drives the first pulley 341 to rotate around the axis in the Y-axis direction through the gear set 343, the transmission belt 344 sequentially passes through the second pulley 342, the second transmission member 332, the third transmission member 333, and the first transmission member 331 to drive the outer tub 41 of the rotary hook 40 to rotate about the Y-axis.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. The utility model provides a zigzag sewing machine, has one can carry out reciprocating swing's eedle and one and extend the lower tube seat that forms along X axle direction, the inside of lower tube seat is equipped with a lower axle, the lower axle drives an outer cauldron through a drive mechanism and uses Y axle direction to rotate as the axle center its characterized in that: the transmission mechanism includes:

the rotating shuttle seat is positioned in the Y-axis direction of the outer kettle and is provided with a connecting part connected with the lower tube seat and a penetrating part arranged inside the outer kettle, and an accommodating space positioned inside the outer kettle is arranged between the penetrating part and the outer kettle;

the bearing is positioned in the accommodating space and is in contact with the outer diameter of the penetrating part and the inner diameter of the outer kettle; and

the first transmission piece can drive the outer kettle to rotate and is connected to the outside of the outer kettle, so that the first transmission piece, the bearing and the penetrating part are sequentially arranged from outside to inside.

2. Zigzag sewing machine according to claim 1, characterized in that: the rotating shuttle seat forms a through passage which passes through the connecting part and the penetrating part, and the through passage is communicated with the inside of the outer kettle.

3. Zigzag sewing machine according to claim 1, characterized in that: the rotating shuttle seat is provided with a first connecting body connected with the lower tube seat and a second connecting body positioned in the outer kettle, a first adjusting assembly is arranged between the first connecting body and the second connecting body and used for adjusting the size of a gap between the second connecting body and the outer kettle in the Y-axis direction, and further the size of a space of the accommodating space in the Y-axis direction can be synchronously adjusted.

4. Zigzag sewing machine according to claim 3, characterized in that: the first connecting body and the second connecting body are respectively provided with a first contact surface and a second contact surface which can be in contact with the outer kettle, the second connecting body can be close to or far away from the first connecting body along the Y-axis direction through the first adjusting assembly, and the first contact surface and the second contact surface can jointly prevent the outer kettle from moving along the Y axis.

5. Zigzag sewing machine according to claim 4, characterized in that: the first connecting body is provided with a first lower connecting column which is in contact with the bearing and a first upper connecting column which is provided with the first contact surface, the second connecting body is provided with a second lower connecting column which is provided with the second contact surface and a second upper connecting column which is connected with the first lower connecting column through the first adjusting component, the first lower connecting column, the second lower connecting column and the second upper connecting column jointly form the penetrating part, and then the first upper connecting column independently forms the connecting part.

6. Zigzag sewing machine according to claim 5, characterized in that: the first connecting body is further provided with a through hole for accommodating the second upper connecting column, a limiting part is arranged inside the through hole, the limiting part is spirally embedded in the through hole and contacts with the second connecting column, and the limiting part is provided with an accommodating groove for accommodating the oil cotton.

7. Zigzag sewing machine according to claim 1, characterized in that: and a second adjusting assembly is arranged between the connecting part and the lower pipe seat and is used for enabling the rotating shuttle seat to move relative to the lower pipe seat, so that the rotating shuttle seat can drive the outer kettle to selectively approach or leave the lower pipe seat.

8. Zigzag sewing machine according to claim 7, characterized in that: the partial length of the connecting part protrudes out of the lower tube seat, and a locking piece is installed, the locking piece is in contact with the surface of the lower tube seat, so that the rotating shuttle seat is prevented from moving through the second adjusting assembly under the condition that the outer kettle rotates by taking the Y axis as the axis direction.

9. Zigzag sewing machine according to claim 1, characterized in that: the transmission mechanism is also provided with a second transmission piece capable of driving the first transmission piece to rotate and a driven assembly located in the Y-axis direction of the second transmission piece, the second transmission piece is located in the X-axis direction of the first transmission piece, one end of the driven assembly is connected to the second transmission piece, and the end far away from the outer kettle is connected to the lower shaft.

10. Zigzag sewing machine according to claim 9, characterized in that: the transmission mechanism is also provided with a third transmission piece positioned between the first transmission piece and the second transmission piece, the third transmission piece is meshed with the first transmission piece and the second transmission piece simultaneously, so that a meshing gap is formed between the first transmission piece and the third transmission piece and between the second transmission piece and the third transmission piece, the third transmission piece is movably assembled on the lower tube seat, and the third transmission piece can move relative to the lower tube seat so as to adjust the gap size of the meshing gap.

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