CN219218332U

CN219218332U - Sewing machine capable of switching stitch

Info

Publication number: CN219218332U
Application number: CN202320836821.3U
Authority: CN
Inventors: 郑贤
Original assignee: Wenzhou Xinjia Precision Machinery Co ltd
Current assignee: Wenzhou Xinjia Precision Machinery Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-06-20
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses a sewing machine capable of switching stitch, which has the technical scheme that the sewing machine comprises a sewing machine main body, wherein the sewing machine main body comprises a machine head and a machine seat, a driving main shaft is arranged in the machine head, a power wheel which is connected with the driving main shaft and synchronously rotates is arranged in the machine head, a clutch mechanism is arranged in the machine head, the clutch mechanism comprises a driving wheel and a clutch wheel which are coaxially arranged, the driving wheel is connected with the power wheel, and the clutch wheel stretches and contracts along the axial direction to realize linkage and separation with the driving wheel; the machine head is internally provided with a swing needle shaft, the machine seat is internally provided with a large transmission shaft and a small transmission shaft, the large transmission shaft is of a hollow structure, and the small transmission shaft is positioned in the large transmission shaft and rotates independently relative to the large transmission shaft; the clutch wheel is connected with the transmission small shaft and the balance needle shaft. The utility model has two mutually switchable stitches, so that one sewing machine can finish sewing of the two stitches, thereby reducing the production cost and accelerating the working efficiency.

Description

Sewing machine capable of switching stitch

Technical Field

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

Background

At present, the existing sewing machine, in particular to a double-needle sewing machine, can only sew one stitch in one machine type, and commonly comprises parallel double-row stitches and crossed stitches. The existing product can design different stitch on different positions of a product according to the visual aesthetic degree and the sewing strength of different stitch, at this time, if a traditional double-needle sewing machine is adopted, one stitch needs to be sewn firstly, and then the other stitch needs to be sewn on the other sewing machine, so that two sewing machines are needed to be prepared, the production cost is increased, and the efficiency of the sewing work is reduced.

Therefore, in order to overcome the defects of the existing sewing machine, it is needed to provide a sewing machine with changeable stitch, so that when sewing, only one sewing machine is needed to complete sewing of different stitch, thereby reducing production cost and accelerating working efficiency.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the sewing machine with the switchable stitch, which is provided with two mutually switchable stitches, so that one sewing machine can finish sewing of the two stitches, the production cost is reduced, and the working efficiency is accelerated.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a sewing machine of switchable stitch, includes the sewing machine main part, the sewing machine main part includes aircraft nose and frame, be equipped with driving spindle in the aircraft nose, its characterized in that: the machine head is internally provided with a power wheel which is connected with the driving main shaft and synchronously rotates, the machine head is internally provided with a clutch mechanism, the clutch mechanism comprises a driving wheel and a clutch wheel which are coaxially arranged, the driving wheel is connected with the power wheel, and the clutch wheel stretches and contracts along the axial direction to realize linkage and separation with the driving wheel; the machine head is internally provided with a needle swinging shaft, the machine seat is internally provided with a large transmission shaft and a small transmission shaft, the large transmission shaft is of a hollow structure, and the small transmission shaft is positioned in the large transmission shaft and rotates independently relative to the large transmission shaft; the clutch wheel is connected with the transmission small shaft and the balance needle shaft.

The utility model is further provided with: the clutch wheel is provided with a clutch convex key, the position of the driving wheel corresponding to the clutch convex key is provided with a groove, and the clutch convex key is clamped into the groove to realize synchronous rotation.

The utility model is further provided with: the clutch wheel comprises a first driving wheel and a second driving wheel, the balance needle shaft is provided with a balance needle wheel, and the small driving shaft is provided with a small shaft wheel; the first driving wheel is connected with the needle swinging wheel through a chain, and the second driving wheel is connected with the small shaft wheel through a chain.

The utility model is further provided with: 4. the machine seat is internally provided with a second power wheel, the second power wheel is connected with the main shaft and synchronously rotates, the second power wheel is provided with a power wheel A, the end part of the large transmission shaft is provided with a large shaft wheel, and the power wheel A is connected with the large shaft wheel through a chain.

The utility model is further provided with: the axial direction of the clutch wheel is provided with a telescopic cylinder, and the telescopic cylinder is used for controlling the axial telescopic movement of the clutch wheel.

The utility model is further provided with: the end of the needle swing shaft is provided with a needle swing disc, a cam groove is arranged in the needle swing disc, a telescopic sliding needle bar is arranged in the machine head, the end of the needle bar is sleeved with a swing head, a connecting rod is arranged on the swing head, and the connecting rod extends into the cam groove and is in clamping fit with the cam groove.

The utility model is further provided with: the feeding device is characterized in that a feeding rod is arranged in the machine base, the middle part of the feeding rod is hinged to the machine base, one end of the feeding rod is provided with an adjusting rod, the other end of the feeding rod is provided with feeding teeth, rollers which are in sliding fit with the adjusting rod are arranged on the adjusting rod, and the feeding teeth are located below the needle rod.

The utility model is further provided with: the large transmission shaft and the small transmission shaft are respectively provided with a first cam and a second cam, and the idler wheels are abutted to the first cam or the second cam.

The utility model is further provided with: the machine seat is provided with a second air cylinder, the output end of the second air cylinder is provided with a clamping groove, and the roller is embedded into the clamping groove, so that the roller can be driven to slide on the adjusting rod through the second air cylinder.

In summary, the utility model has the following beneficial effects:

compared with the prior art, the utility model is provided with the telescopic cylinder and the second cylinder, the telescopic cylinder is used for controlling the clutch mechanism, the second cylinder is used for controlling the roller to be abutted on the first cam or the second cam, when the clutch mechanism is in a separation state during sewing of a first stitch, the small transmission shaft and the swing needle shaft are not operated, the roller is abutted on the first cam, the needle rod at the moment drives the needle to stretch up and down, and meanwhile, the first cam drives the feeding rod to feed a material once along with each needle dropping period of the needle rod, so that parallel double-row stitches are sewn. When the clutch mechanism is in a linkage state, the small transmission shaft and the swing needle shaft run, meanwhile, the second cylinder pushes the roller to abut against the second cam through the clamping groove, when the needle rod stretches up and down, the swing head on the needle rod can also drive the needle to swing, and the second cam drives the feeding rod to feed a material along with every two needle feeding periods of the needle rod, so that crossed stitches are sewn. Therefore, the stitch can be switched at any time through the control of the telescopic cylinder and the second cylinder in cooperation with the sewing machine, and the sewing machine is very convenient and fast.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present embodiment;

FIG. 2 is a schematic diagram of the transmission structure of the present embodiment;

FIG. 3 is a schematic view showing a partial structure of the clutch mechanism of the present embodiment;

FIG. 4 is a schematic view showing a partial structure of a feed lever in the present embodiment;

fig. 5 is a schematic view of the structure of the second cylinder in the present embodiment;

FIG. 6 is a schematic view showing a partial structure of the balance of the present embodiment;

fig. 7 is a schematic view of a section at a cam groove of the present embodiment.

Reference numerals: 1. a sewing machine main body; 101. a machine head; 102. a base; 2. driving a main shaft; 3. a clutch mechanism; 301. a driving wheel; 302. a clutch wheel; 3021. a first driving wheel; 3022. a second driving wheel; 4. a needle swinging shaft; 401. a swing needle wheel; 5. a large transmission shaft; 501. a large arbor wheel; 6. a small transmission shaft; 601. a small shaft wheel; 7. a second power wheel; 701. a driving wheel A; 8. a telescopic cylinder; 9. a wobble plate; 901. cam grooves; 10. a needle bar; 1001. swinging the head; 1002. a connecting rod; 11. a feed rod; 1101. an adjusting rod; 1102. feeding teeth; 1103. a roller; 12. a first cam; 13. a second cam; 14. a second cylinder; 15. a clamping groove; 16. a chain; 17. a pressing wheel; 18. a transition wheel set; 19. a power wheel; 20. a clutch convex key; 21. a groove.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a sewing machine with switchable stitch, as shown in fig. 1-7, comprising a sewing machine body 1, wherein the sewing machine body 1 comprises a machine head 101 and a machine seat 102, and a driving main shaft 2 is arranged in the machine head 101. Wherein the driving spindle 2 is extended out of the machine head and driven by a motor, and the sewing machine is identical to the prior art with respect to the structure of the thread feeding and the thread feeding, reference can be made to a double needle template sewing machine disclosed in publication number CN 217733445U. The utility model is characterized in that a power wheel 19 which is connected with the driving main shaft 2 and synchronously rotates is arranged in the machine head 101, and the power wheel 19 is connected with the driving main shaft 2 through a gear or a chain (not shown in the figure) arranged in the machine head. The clutch mechanism 3 is arranged in the transmission machine head 101, the clutch mechanism 3 comprises a driving wheel 301 and a clutch wheel 302 which are coaxially arranged, the driving wheel 301 is connected with the power wheel 19, and the clutch wheel 302 stretches and contracts along the axial direction to realize linkage and separation with the driving wheel 301; specifically, referring to fig. 3, a telescopic cylinder 8 is disposed in an axial direction of the clutch wheel 302, and the telescopic cylinder 8 is used for controlling axial telescopic movement of the clutch wheel 302; the clutch wheel 302 is provided with the clutch convex key 20, the position of the driving wheel 301 corresponding to the clutch convex key is provided with the groove 21, when the telescopic cylinder 8 stretches out, the clutch convex key 20 can be clamped into the groove 21 to realize synchronous rotation, when the telescopic cylinder 8 retracts, the clutch convex key 20 is separated from the groove 21, the shape of the clutch convex key can be selected to be triangle or hexagon, and the edge can be provided with a chamfer, so that the clutch is smoother and more convenient.

Further, a needle swinging shaft 4 is arranged in the machine head 101, a large transmission shaft 5 and a small transmission shaft 6 are arranged in the machine seat 102, the large transmission shaft 5 is of a hollow structure, and the small transmission shaft 6 is positioned in the large transmission shaft 5 and rotates independently relative to the large transmission shaft 5; the clutch wheel 302 connects the small transmission shaft 6 and the balance staff 4, and through the structure, when the clutch wheel is separated, the small transmission shaft 6 and the balance staff 4 do not move, and when the clutch wheel is linked, the small transmission shaft and the balance staff synchronously rotate along with the clutch wheel.

Further, referring to fig. 2-3, the clutch wheel 302 includes a first driving wheel 3021 and a second driving wheel 3022, the needle swinging wheel 401 is disposed on the needle swinging shaft 4, and the small shaft 601 is disposed on the small driving shaft 6; the first driving wheel 3021 is connected with the needle swinging wheel 401 through a chain, the second driving wheel 3022 is connected with the small shaft wheel 601 through a chain, and in this embodiment, because the space distance between the second driving wheel 3022 and the small shaft wheel 601 is far, and some obstacles exist, a transition wheel set 18 can be further arranged on the machine head, the second driving wheel 3022 is connected with the transition wheel set 18 first, then the small shaft wheel 601 is connected with the transition wheel set 18, the transition wheel set 18 plays a role in transition, and the second driving wheel 3022 and the small shaft wheel 601 can be directly connected according to actual conditions.

Further, a second power wheel 7 is disposed in the base 102, the second power wheel 7 is directly connected with the main shaft 2 through an internal gear or a chain (not shown in the figure) and synchronously rotates, a power wheel a701 is disposed on the second power wheel 7, a large shaft wheel 501 is disposed at an end portion of the large transmission shaft 5, the power wheel a701 is connected with the large shaft wheel 501 through the chain, wherein the second power wheel 7 is directly connected with the large shaft wheel 501, and provides power for the large transmission shaft 5.

Further, referring to fig. 6-7, a needle swinging disc 9 is disposed at an end of the needle swinging shaft 4, a cam groove 901 is disposed in the needle swinging disc 9, a telescopic needle bar 10 is disposed in the machine head 101, a swinging head 1001 is sleeved at an end of the needle bar 10, a connecting rod 1002 is disposed on the swinging head 1001, the connecting rod 1002 extends into the cam groove 901 and is engaged with the cam groove 901 in a clamping manner, through the above structure, the needle swinging disc 9 drives the connecting rod to move transversely along the cam groove 901 when rotating, and then the connecting rod 1002 drives the swinging head 1001 to swing, so that swing of the machine needle is realized.

Further, referring to fig. 4-5, a feeding rod 11 is disposed in the machine base 102, the middle of the feeding rod 11 is hinged on the machine base 102, one end of the feeding rod 11 is provided with an adjusting rod 1101, the other end is provided with a feeding tooth 1102, a roller 1103 in sliding fit with the adjusting rod is disposed on the adjusting rod 1101, the feeding tooth 1102 is located below the needle rod 10, a first cam 12 and a second cam 13 are disposed on the large transmission shaft 5 and the small transmission shaft 6 respectively, the roller 1103 is abutted to the first cam 12 or the second cam 13, a second cylinder 14 is disposed on the machine base 102, a clamping groove 15 is disposed at the output end of the second cylinder 14, and the roller 1103 is embedded in the clamping groove 15, so that the roller 1103 can be driven to slide on the adjusting rod by the second cylinder 14. Specifically, the protruding structures on the first cam 12 are the same as the needle-setting periods of the needle bar, that is, each needle-setting period, the feeding bar 11 swings once under the action of the first cam 12, the feeding teeth 1102 are lifted up during swinging to push the material with the bottom for sewing forward for a certain distance, the number of the protruding structures on the second cam 13 is half of that of the first cam, so that the feeding bar lifts up for feeding once every two needle-setting periods, that is, the needle swings to the left side for needle-setting once, and after swinging to the right side for needle-setting once, the material pushes forward for a certain distance, so that the crossed stitch can be sewn just twice in one position of the material.

The specific use mode is as follows, when the parallel double-row stitch is to be sewn, the telescopic cylinder and the second cylinder are controlled to retract, the balance staff and the small transmission shaft do not run at the moment, the needle does not swing, the roller is abutted against the first cam, the needle does up-down reciprocating motion, and the parallel double-row stitch can be sewn after feeding once every time the needle is put down.

When the stitching is needed to be performed, the telescopic cylinder and the second cylinder are controlled to extend, at the moment, the needle swinging shaft and the small transmission shaft operate, the needle is subjected to the actions of the needle swinging disc, the connecting rod and the swinging head, the needle swings when the needle is reciprocated up and down, the roller is pushed to the second cam by the clamping groove, feeding is performed once every needle is performed twice, specifically, the needle swings left and down once, and after the needle swings right and down once, the feeding rod feeds once under the action of the second cam, so that the stitching can be performed. The user can more attractive degree and sewing strength, and the switch between the two stitch lines can be performed at any time, so that the sewing machine is very convenient and quick.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the design concept of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides a sewing machine of switchable stitch, includes sewing machine main part (1), sewing machine main part (1) include aircraft nose (101) and frame (102), be equipped with in aircraft nose (101) drive main shaft (2), its characterized in that: the machine head (101) is internally provided with a power wheel (19) which is connected with a driving main shaft (2) and synchronously rotates, the machine head (101) is internally provided with a clutch mechanism (3), the clutch mechanism (3) comprises a driving wheel (301) and a clutch wheel (302) which are coaxially arranged, the driving wheel (301) is connected with the power wheel (19), and the clutch wheel (302) stretches and contracts along the axial direction to realize linkage and separation with the driving wheel (301); a swing needle shaft (4) is arranged in the machine head (101), a transmission large shaft (5) and a transmission small shaft (6) are arranged in the machine seat (102), the transmission large shaft (5) is of a hollow structure, and the transmission small shaft (6) is positioned in the transmission large shaft (5) and rotates independently relative to the transmission large shaft (5); the clutch wheel (302) is connected with the small transmission shaft (6) and the balance needle shaft (4).

2. A switchable stitch sewing machine as claimed in claim 1 wherein: the clutch wheel (302) is provided with a clutch convex key (20), the position of the driving wheel (301) corresponding to the clutch convex key is provided with a groove (21), and the clutch convex key (20) is clamped into the groove (21) to realize synchronous rotation.

3. A switchable stitch sewing machine as claimed in claim 1 wherein: the clutch wheel (302) comprises a first driving wheel (3021) and a second driving wheel (3022), a needle swinging wheel (401) is arranged on the needle swinging shaft (4), and a small shaft wheel (601) is arranged on the small driving shaft (6); the first driving wheel (3021) is connected with the needle swinging wheel (401) through a chain, and the second driving wheel (3022) is connected with the small shaft wheel (601) through a chain.

4. A switchable stitch sewing machine as claimed in claim 1 wherein: the novel high-speed motor is characterized in that a second power wheel (7) is arranged in the base (102), the second power wheel (7) is connected with the main shaft (2) and synchronously rotates, a power wheel A (701) is arranged on the second power wheel (7), a large shaft wheel (501) is arranged at the end part of the large transmission shaft (5), and the power wheel A (701) is connected with the large shaft wheel (501) through a chain.

5. A switchable stitch sewing machine as claimed in claim 1 wherein: a telescopic cylinder (8) is arranged in the axial direction of the clutch wheel (302), and the telescopic cylinder (8) is used for controlling the axial telescopic movement of the clutch wheel (302).

6. A switchable stitch sewing machine as claimed in claim 1 wherein: the end of balance needle axle (4) is provided with balance needle dish (9), be provided with cam groove (901) in balance needle dish (9), be equipped with flexible gliding needle bar (10) in aircraft nose (101), pendulum head (1001) have been cup jointed to needle bar (10) tip, be provided with connecting rod (1002) on pendulum head (1001), connecting rod (1002) extend to in cam groove (901) to with cam groove (901) joint cooperation.

7. A switchable stitch sewing machine as defined in claim 6, wherein: be equipped with pay-off pole (11) in frame (102), the middle part of pay-off pole (11) articulates on frame (102), one end of pay-off pole (11) is equipped with regulation pole (1101), and the other end is equipped with feeding tooth (1102), be equipped with on regulation pole (1101) with regulation pole sliding fit's gyro wheel (1103), feeding tooth (1102) are located the below of needle bar (10).

8. A switchable stitch sewing machine as recited in claim 7, wherein: the large transmission shaft (5) and the small transmission shaft (6) are respectively provided with a first cam (12) and a second cam (13), and the roller (1103) is abutted against the first cam (12) or the second cam (13).

9. A switchable stitch sewing machine as recited in claim 8, wherein: the machine seat (102) is provided with a second air cylinder (14), the output end of the second air cylinder (14) is provided with a clamping groove (15), and the roller (1103) is embedded into the clamping groove (15) so that the roller (1103) can be driven to slide on the adjusting rod through the second air cylinder (14).