CN114086329A

CN114086329A - Sewing machine with adjustable thread hooking time of rotating shuttle

Info

Publication number: CN114086329A
Application number: CN202010859877.1A
Authority: CN
Inventors: 何明金; 祝书伟; 甘成杰
Original assignee: Jack Technology Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2022-02-25

Abstract

The invention provides a sewing machine with adjustable hook time of a rotating shuttle, which comprises a main shaft, a needle rod mechanism driven by the main shaft to move, a lower shaft parallel to the main shaft, the rotating shuttle driven by the lower shaft to move, a transmission mechanism connected between the main shaft and the lower shaft, a clutch mechanism and an operating device arranged on a machine shell in the sewing machine, wherein the clutch mechanism is connected between the main shaft and the transmission mechanism, or connected in the transmission mechanism, or connected between the transmission mechanism and the lower shaft; when the operating device does not act on the clutch mechanism, the clutch mechanism enables power transmission between the two components connected by the clutch mechanism; when the operating device acts on the clutch mechanism, the clutch mechanism enables no power transmission between the two components connected by the clutch mechanism. This application when adjusting the motion relation between eedle and the rotating shuttle, only need the operation install in the operating means of sewing machine casing to the rotating main shaft can, it is very convenient to operate, guarantees that the sewing is experienced.

Description

Sewing machine with adjustable thread hooking time of rotating shuttle

Technical Field

The invention relates to sewing equipment, in particular to a sewing machine with adjustable thread hooking time of a rotating shuttle.

Background

Currently, a sewing machine generally includes a main shaft, a main motor for driving the main shaft to rotate, a lower shaft parallel to the main shaft, a needle bar mechanism driven by the main shaft to move, and a rotating shuttle driven by the lower shaft, the rotating shuttle is directly fixed at the end of the lower shaft through a screw, the needle bar mechanism and the rotating shuttle cooperate to form a stitch on a sewing material, for example: a sewing machine is disclosed in publication No. CN 1805965A.

Further, in the sewing machine of the prior art, the transmission structure between the main shaft 10 and the lower shaft 30 is: as shown in fig. 1, a vertical shaft 51 extending up and down is arranged between the main shaft 10 and the lower shaft 30, a first gear 52 is fixedly connected to the main shaft 10 through a screw, a second gear 53 is fixedly connected to the upper end of the vertical shaft 51 through a screw, and the first gear 52 is engaged with the second gear 53; the lower end of the vertical shaft 51 is fixedly connected with a third gear 54 through a screw, the lower shaft 30 is fixedly connected with a fourth gear 55 through a screw, and the third gear 54 is meshed with the fourth gear 55. When the main motor drives the main shaft 10 to rotate, the main shaft 10 drives the needle bar mechanism 20 to operate together, meanwhile, the main shaft 10 drives the lower shaft 30 to operate together through the first gear 52, the second gear 53, the vertical shaft 51, the third gear 54 and the fourth gear 55, and the lower shaft 30 drives the rotating shuttle 40 to rotate synchronously, thereby realizing sewing. In the sewing machine having the above-described structure, after the adjustment, the phase difference between the main shaft 10 and the lower shaft 30 is not changed, and the needle bar mechanism 20 moves in synchronization with the main shaft 10, and the rotary hook 40 moves in synchronization with the lower shaft 30, so that the movement relationship between the needle 28 and the rotary hook 40 in the needle bar mechanism 20 is determined and unique.

Further, in the sewing machine having the above-described structure, the main shaft 10 is rotated, the needle 28 reciprocates up and down, and the rotary hook 40 rotates around the lower shaft 30. As shown in FIG. 2, after the needle 28 carries the suture downward through the material 110 and to the lowest point, the needle 28 carries the suture upward again, and the suture does not move upward simultaneously with the needle 28 due to the high friction between the suture and the material 110; thus, when the needle 28 is lifted back up from the nadir, the suture will form a loop, i.e., loop 120. After the needle 28 is raised to a certain height, the hook tip on the rotating shuttle 40 also moves right under the needle 28, at this time, the hook tip on the rotating shuttle 40 passes through the loop 120 formed by the suture, as shown in fig. 3, the hook tip carries the loop 120 to rotate around the rotating shuttle 40 for a circle and then interweave with the bottom thread, and a stitch is formed on the sewing material 110.

Further, when the sewing work changes the sewing material 110 and the sewing material, a phenomenon that the thread loop 120 formed by the sewing becomes small may occur, as shown in fig. 4, after the thread loop 120 becomes small, the hook tip of the rotary hook 40 is not easy to hook the thread loop 120, so that the stitch may not be formed, and a phenomenon of needle skipping in different degrees may occur. In order to reduce the needle skipping rate and ensure that the hook tip of the rotating shuttle 40 can normally hook the thread loop 120, the motion relationship between the rotating shuttle 40 and the needle 28 needs to be adjusted, the shell of the sewing machine needs to be opened, the screw for fixing the rotating shuttle 40 and the lower shaft 30 is manually loosened, the main shaft 10 is rotated by a certain angle, and then the screw for fixing the rotating shuttle 40 and the lower shaft 30 is locked, so that the adjusting process is very complicated, certain trouble is brought to a sewing worker, and the sewing experience is influenced.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a sewing machine with adjustable hook time of a rotating shuttle, which can conveniently adjust the motion relationship between the rotating shuttle and a needle, and effectively reduce the needle skipping rate.

In order to achieve the purpose, the invention provides a sewing machine with an adjustable hook time of a rotating shuttle, which comprises a main shaft, a needle rod mechanism driven by the main shaft to move, a lower shaft parallel to the main shaft, the rotating shuttle driven by the lower shaft to move, a transmission mechanism connected between the main shaft and the lower shaft, a clutch mechanism and an operating device arranged on a machine shell in the sewing machine, wherein the clutch mechanism is connected between the main shaft and the transmission mechanism, or connected in the transmission mechanism, or connected between the transmission mechanism and the lower shaft; when the operating device does not act on the clutch mechanism, the clutch mechanism enables power transmission between two components connected by the clutch mechanism; when the operating device acts on the clutch mechanism, the clutch mechanism enables no power transmission between the two components connected by the clutch mechanism.

Furthermore, the transmission mechanism comprises a vertical shaft extending up and down, a first gear sleeved on the main shaft, a second gear fixed at the upper end of the vertical shaft, a third gear fixed at the lower end of the vertical shaft, and a fourth gear fixed on the lower shaft, the first gear is meshed with the second gear, the third gear is meshed with the fourth gear, and the clutch mechanism is connected between the main shaft and the first gear.

Furthermore, the transmission mechanism comprises a vertical shaft extending up and down, a first gear fixed on the main shaft, a second gear sleeved at the upper end of the vertical shaft, a third gear fixed at the lower end of the vertical shaft, and a fourth gear fixed on the lower shaft, the first gear is meshed with the second gear, the third gear is meshed with the fourth gear, and the clutch mechanism is connected between the vertical shaft and the second gear.

Furthermore, the transmission mechanism comprises a vertical shaft extending up and down, a first gear fixed on the main shaft, a second gear fixed at the upper end of the vertical shaft, a third gear sleeved at the lower end of the vertical shaft, and a fourth gear fixed on the lower shaft, the first gear is meshed with the second gear, the third gear is meshed with the fourth gear, and the clutch mechanism is connected between the vertical shaft and the third gear.

Furthermore, the transmission mechanism comprises a vertical shaft extending up and down, a first gear fixed on the main shaft, a second gear fixed at the upper end of the vertical shaft, a third gear fixed at the lower end of the vertical shaft, and a fourth gear sleeved on the lower shaft, the first gear is meshed with the second gear, the third gear is meshed with the fourth gear, and the clutch mechanism is connected between the lower shaft and the fourth gear.

Further, two components connected by the clutch mechanism are defined as a shaft component and a gear component, the shaft component and the gear component are in rotational fit; the clutch mechanism comprises a connecting wheel which is rotationally matched with the shaft part, a sliding sheet with a clamping tooth part and a ratchet wheel which is fixed on the shaft part, two ends of the connecting wheel are respectively provided with a connecting groove and a first sliding groove, the gear part is provided with a connecting part which is in contact fit with the surface of the connecting groove, and the sliding sheet is positioned in the first sliding groove and is in sliding fit with the first sliding groove; when the operating device does not act on the clutch mechanism, the clamping tooth part on the sliding sheet is meshed with the ratchet wheel; when the operating device acts on the clutch mechanism, the clamping tooth part on the sliding piece is separated from the ratchet wheel.

Furthermore, a stop groove is formed in the outer peripheral surface of the connecting wheel and communicated with the first sliding groove, one end, far away from the clamping tooth part, of the sliding sheet is higher than the groove bottom of the stop groove, and the operating device is provided with a button part located outside the machine shell and a telescopic rod driven by the button part to move; when the button part is pressed down, the telescopic rod extends into the stop groove and pushes the sliding sheet to separate the tooth clamping part on the sliding sheet from the ratchet wheel.

Furthermore, the clutch mechanism also comprises a return spring arranged on the connecting wheel, and one end of the return spring acts on the clamping tooth part and applies acting force towards the ratchet wheel along the extending direction of the first sliding chute to the clamping tooth part.

Further, needle bar mechanism includes needle bar crank, take-up crank, needle bar connecting rod, is fixed in guide rail, the slider of sewing machine casing, the needle bar that extends from top to bottom, fixes the connector on the needle bar and installs the eedle at the needle bar lower extreme, the needle bar crank is fixed in the main shaft and links to each other with the take-up crank, the both ends of needle bar connecting rod are articulated with take-up crank and connector respectively, the tip and the slider normal running fit of connector, set up in the guide rail about extending and with slider sliding fit's second spout.

Further, the rotating shuttle is fixed with the lower shaft.

As described above, the sewing machine with adjustable hook time of the rotating shuttle provided by the invention has the following beneficial effects:

in the sewing machine, a user acts on the operating device to enable the operating device to act on the clutch mechanism, so that no power transmission can be realized between the main shaft and the lower shaft, at the moment, the main shaft is rotated to drive the needle rod mechanism to move, but the lower shaft and the rotating shuttle are in a static state, so that the movement relation between the main shaft and the lower shaft can be finely adjusted, namely the movement relation between a machine needle and the rotating shuttle in the needle rod mechanism is finely adjusted, and the thread hooking time of the rotating shuttle is adjusted, so that the probability that the hook tip of the rotating shuttle hooks a thread ring is increased, and the needle skipping rate is finally reduced. Therefore, when the motion relation between the needle and the rotating shuttle is adjusted, the operation device arranged on the shell of the sewing machine is only needed to be operated and the main shaft is rotated, the operation is very convenient, and the sewing experience is ensured.

Drawings

Fig. 1 is a schematic view showing a structure of a sewing machine in the prior art.

Fig. 2 and 3 are views illustrating a process of forming stitches by the sewing machine of fig. 1.

Fig. 4 is a schematic view of a structure in which the wire loop is reduced.

Fig. 5 and 6 are schematic structural diagrams of an embodiment of a sewing machine with a rotating shuttle capable of adjusting thread hooking time according to the application under different viewing angles.

Fig. 7 is a schematic structural view of the needle bar mechanism of fig. 6.

Fig. 8 is a schematic structural diagram of the clutch mechanism in fig. 6.

Fig. 9 is a schematic view of the structure of the gear member of fig. 8.

Fig. 10 is a schematic structural view of the fifth wheel in fig. 8.

FIG. 11 is a schematic view of the slider shown in FIG. 8.

Fig. 12 is a schematic structural view of a second embodiment of a sewing machine with a hook time adjustable rotating shuttle according to the present application.

Fig. 13 is a schematic structural view of the fine adjustment of the hook time of the rotating shuttle according to the present application when the loop becomes larger.

Description of the element reference numerals

10 spindle

20 needle bar mechanism

21 needle bar crank

22 thread take-up crank

23 needle bar connecting rod

24 guide rail

241 second sliding chute

25 sliding block

26 needle bar

27 connecting head

28 machine needle

30 lower shaft

40 rotating shuttle

50 transmission mechanism

51 vertical axis

52 first gear

53 second gear

54 third gear

55 fourth gear

60 clutch mechanism

61 connecting wheel

611 connecting groove

612 first sliding chute

613 stop groove

62 sliding vane

621 latch part

63 ratchet wheel

64 reset spring

65 retainer ring

70 operating device

71 button part

72 telescopic rod

80 shaft component

90 Gear parts

91 connecting part

92 plane of connection

110 sewing material

120 wire ring

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.

The present application provides a sewing machine with adjustable hook time of a rotating shuttle, which has a housing, a main shaft 10 rotatably supported in the housing, and a main motor driving the main shaft 10 to rotate. For convenience of description, the following embodiments define the directions as follows: defining the axial direction of the main shaft 10 as a left-right direction, and defining the direction of the main shaft 10 towards the head of the sewing machine as a left direction; the moving direction of the sewing material 110 when the sewing machine is sewing is defined as a front direction; a direction orthogonal to both the left-right direction and the front-rear direction is defined as an up-down direction. Thus, in the view shown in fig. 5, the left and right sides of the paper surface are the left and right directions, respectively, the upper and lower sides of the paper surface are the upper and lower directions, respectively, and the back and front sides of the paper surface are the front and left directions, respectively.

As shown in fig. 5 and 6, the sewing machine with adjustable hook time of the rotating shuttle according to the present application includes a main shaft 10 extending left and right, a needle bar mechanism 20 driven by the main shaft 10 and located at the left end of the main shaft 10, a hand wheel 130 fixedly installed at the right end of the main shaft 10, a lower shaft 30 parallel to the main shaft 10 and located at the lower side of the main shaft 10, a rotating shuttle 40 driven by the lower shaft 30 and located at the left end of the lower shaft 30, a transmission mechanism 50 connected between the main shaft 10 and the lower shaft 30, a clutch mechanism 60, and an operating device 70, wherein the operating device 70 is installed on the sewing machine housing, the motion relationship between the main shaft 10 and the needle bar mechanism 20 is determined and unique, and the motion relationship between the lower shaft 30 and the rotating shuttle 40 is also determined and unique. In particular, the clutch mechanism 60 is connected between the main shaft 10 and the transmission mechanism 50, or in the transmission mechanism 50, or between the transmission mechanism 50 and the lower shaft 30; when the clutch mechanism 60 is connected between the main shaft 10 and the transmission mechanism 50, the transmission mechanism 50 itself and the transmission mechanism 50 and the lower shaft 30 are in a transmission connection state; when the clutch mechanism 60 is connected in the transmission mechanism 50, the main shaft 10 and the transmission mechanism 50, and the transmission mechanism 50 and the lower shaft 30 are in transmission connection; when the clutch mechanism 60 is connected between the transmission mechanism 50 and the lower shaft 30, the main shaft 10 and the transmission mechanism 50, and the transmission mechanism 50 itself are in a transmission connection state.

When the sewing machine is normally sewing, the operating device 70 does not act on the clutch mechanism 60, and at this time, the clutch mechanism 60 enables power transmission between two components connected by the clutch mechanism 60, namely, the main shaft 10 and the transmission mechanism 50, the transmission mechanism 50 itself or the transmission mechanism 50 and the lower shaft 30, and finally enables power transmission between the main shaft 10 and the lower shaft 30. The main motor drives the main shaft 10 to rotate, and the main shaft 10 drives the needle rod mechanism 20 to move, so that a needle 28 in the needle rod mechanism 20 reciprocates up and down; meanwhile, the main shaft 10 drives the lower shaft 30 to rotate through the transmission mechanism 50, the lower shaft 30 drives the rotating shuttle 40 to move, the revolving motion of the rotating shuttle 40 rotating around the lower shaft 30 is matched with the up-and-down reciprocating motion of the needle 28, and stitches are formed on the sewing material 110. Specifically, as shown in FIG. 2, after the needle 28 carries the suture downward through the material 110 and to the lowest point, the needle 28 carries the suture upward, and the suture does not move upward simultaneously with the needle 28 due to the high friction between the suture and the material 110; thus, when the needle 28 is lifted back up from the nadir, the suture will form a loop, i.e., loop 120. After the needle 28 is raised to a certain height, the hook tip on the rotating shuttle 40 also moves right under the needle 28, at this time, the hook tip on the rotating shuttle 40 passes through the loop 120 formed by the suture, as shown in fig. 3, the hook tip carries the loop 120 to rotate around the rotating shuttle 40 for a circle and then interweave with the bottom thread, and a stitch is formed on the sewing material 110.

When the sewing work changes the sewing material 110 and the sewing material, a phenomenon that a thread loop 120 formed by the sewing becomes small occurs, as shown in fig. 4. In order to prevent the skip stitch phenomenon caused by the reduction of the wire loop 120, the operator presses the operating device 70 to make the operating device 70 act on the clutch mechanism 60, and at this time, the clutch mechanism 60 enables the unpowered transmission between the two components connected by the clutch mechanism 60, that is, the unpowered transmission between the main shaft 10 and the lower shaft 30, after which, the operator turns the hand wheel 130, thereby rotating the main shaft 10 through an angle, in the process, the main shaft 10 drives the needle bar mechanism 20 to move, the needle 28 in the needle bar mechanism 20 also moves, but the lower shaft 30 and the rotating shuttle 40 are in a static state, therefore, the motion relationship between the main shaft 10 and the lower shaft 30, that is, the motion relationship between the needle 28 and the rotating shuttle 40 in the fine adjustment needle bar mechanism 20, and the hook time of the rotating shuttle are adjusted, specifically, the motion relationship of the rotating shuttle 40 relative to the needle 28 is delayed on the premise that the rotating shuttle 40 can normally hook the thread loop 120. After the adjustment, when the sewing machine performs subsequent sewing, the needle 28 has more time to enlarge the thread loop 120 in the rising process, as shown in fig. 13, thereby greatly increasing the probability that the tip of the rotating shuttle 40 hooks the thread loop 120, forming stitches on the sewing material 110 and reducing the needle skipping rate. Therefore, in the sewing machine according to the present application, the motion relationship between the main shaft 10 and the needle bar mechanism 20 is determined and unique, the motion relationship between the lower shaft 30 and the rotary hook 40 is determined and unique, but the motion relationship between the main shaft 10 and the lower shaft 30 is adjustable, so that the motion relationship between the needle 28 and the rotary hook 40 in the needle bar mechanism 20 is also adjustable, the thread hooking time of the rotary hook 40 can be adjusted, the enlargement of the thread loop 120 is facilitated, and the occurrence of the needle skipping phenomenon is avoided. In addition, when the motion relation between the needle 28 and the rotating shuttle 40 is adjusted, only the operating device 70 arranged on the shell of the sewing machine needs to be operated, and the hand wheel 130 is rotated to drive the main shaft 10 to rotate, so that the operation is very convenient, and the sewing experience is ensured.

Preferably, the operating device 70 has a button portion 71 located outside the housing, and when the operator presses the button portion 71, the operating device 70 acts on the clutch mechanism 60; when the operator does not press the button portion 71, the operation device 70 does not act on the clutch mechanism 60. Therefore, the operator can disconnect the transmission chain between the main shaft 10 and the lower shaft 30 by pressing the button portion 71 of the operation device 70 located outside the housing, and can adjust the movement relationship between the main shaft 10 and the lower shaft 30, thereby further improving the convenience of operation.

Further, as shown in fig. 5 and 6, the rotary hook 40 is fixed to the lower shaft 30 by a screw. As shown in fig. 6 and 7, the needle bar mechanism 20 includes a needle bar crank 21, a thread take-up crank 22, a needle bar link 23, a guide rail 24 fixed to the sewing machine housing, a slider 25, a needle bar 26 extending up and down, a connector 27 fixed to the needle bar 26, and a needle 28 mounted at the lower end of the needle bar 26, the needle bar crank 21 is fixed to the left end of the main shaft 10 by a screw and connected to the thread take-up crank 22, both ends of the needle bar link 23 are respectively hinged to the thread take-up crank 22 and the connector 27, the left end of the connector 27 is rotatably engaged with the slider 25, and a second slide groove 241 extending up and down and slidably engaged with the slider 25 is opened in the guide rail 24.

Further, as shown in fig. 5 and 6, the transmission mechanism 50 includes a vertical shaft 51 extending up and down, a first gear 52 provided on the main shaft 10, a second gear 53 provided at an upper end of the vertical shaft 51, a third gear 54 provided at a lower end of the vertical shaft 51, and a fourth gear 55 provided on the lower shaft 30, the first gear 52 being engaged with the second gear 53, and the third gear 54 being engaged with the fourth gear 55. The sewing machine has four embodiments described below based on the difference in the position where the clutch mechanism 60 is provided.

First embodiment, as shown in fig. 5 and 6, the clutch mechanism 60 is connected between the main shaft 10 and the first gear 52, at this time, the first gear 52 is rotatably sleeved on the main shaft 10, and the second gear 53 and the vertical shaft 51, the third gear 54 and the vertical shaft 51, and the fourth gear 55 and the lower shaft 30 are all locked and fixed by screws.

In the second embodiment, as shown in fig. 11, the clutch mechanism 60 is connected between the vertical shaft 51 and the second gear 53, at this time, the second gear 53 is rotatably sleeved on the vertical shaft 51, and the first gear 52 and the main shaft 10, the third gear 54 and the vertical shaft 51, and the fourth gear 55 and the lower shaft 30 are all locked and fixed by screws.

In the third embodiment, the clutch mechanism 60 is connected between the vertical shaft 51 and the third gear 54, at this time, the third gear 54 is rotatably sleeved on the vertical shaft 51, and the first gear 52 and the main shaft 10, the second gear 53 and the vertical shaft 51, and the fourth gear 55 and the lower shaft 30 are all locked and fixed by screws.

In the fourth embodiment, the clutch mechanism 60 is connected between the lower shaft 30 and the fourth gear 55, at this time, the fourth gear 55 is rotatably sleeved on the lower shaft 30, and the first gear 52 and the main shaft 10, the second gear 53 and the vertical shaft 51, and the third gear 54 and the vertical shaft 51 are all locked and fixed by screws.

In the four embodiments described above, the two members connected by the clutch mechanism 60 are defined as the shaft member 80 and the gear member 90, and the shaft member 80 is rotationally engaged with the gear member 90. Therefore, in the first embodiment, the main shaft 10 is the shaft member 80, and the first gear 52 is the gear member 90; in the second embodiment, the vertical shaft 51 is the shaft member 80, and the second gear 53 is the gear member 90; in the third embodiment, the vertical shaft 51 is the shaft member 80, and the third gear 54 is the gear member 90; in the fourth embodiment, the lower shaft 30 is the shaft member 80, and the fourth gear 55 is the gear member 90. The preferred embodiment of the clutch mechanism 60 is: as shown in fig. 8 to 11, the clutch mechanism 60 includes a connecting wheel 61 rotatably engaged with the shaft member 80, a sliding piece 62 having a locking portion 621, and a ratchet wheel 63 fixed to the shaft member 80 by a screw, wherein a connecting groove 611 and a first sliding groove 612 are respectively opened at both ends of the connecting wheel 61, a connecting portion 91 surface-contacted and engaged with the connecting groove 611 is provided on the gear member 90, and the sliding piece 62 is located in the first sliding groove 612 and slidably engaged therewith. Preferably, a stop groove 613 is formed on the outer peripheral surface of the connecting wheel 61, the stop groove 613 is communicated with the first sliding groove 612, one end of the sliding piece 62 far away from the clamping tooth portion 621 is higher than the groove bottom of the stop groove 613, and the operating device 70 is provided with a telescopic rod 72 driven by the button portion 71 to move; when the button portion 71 is pressed, the telescopic rod 72 extends into the stopping groove 613 and pushes the sliding piece 62, so that the tooth-clamping portion 621 of the sliding piece 62 is separated from the ratchet 63. The clutch mechanism 60 further includes a return spring 64 attached to the connecting wheel 61, and one end of the return spring 64 acts on the ratchet portion 621 to apply a force to the ratchet portion 621 toward the ratchet wheel 63 in the extending direction of the first sliding groove 612.

The operation principle of the clutch mechanism 60 will be described below by taking the main shaft 10 as the shaft member 80 and the first gear 52 as the gear member 90 as examples.

When the sewing machine is normally sewing, the operating device 70 does not act on the clutch mechanism 60, at this time, the telescopic rod 72 of the operating device 70 does not extend into the stop groove 613, and the return spring 64 causes the tooth clamping portion 621 of the sliding piece 62 to engage with the ratchet 63. The main motor drives the main shaft 10 to rotate, actively drives the ratchet wheel 63 to rotate together, and the ratchet wheel 63 is meshed with the tooth clamping part 621, the sliding piece 62 is embedded in the first sliding groove 612, and the connecting part 91 of the gear part 90 is embedded in the connecting groove 611, so that the ratchet wheel 63 drives the sliding piece 62, the connecting wheel 61 and the gear part 90 to rotate together, the main shaft 10 drives the lower shaft 30 to rotate through the transmission mechanism 50, the needle 28 and the rotating shuttle 40 keep a certain motion relationship, and the two are matched with each other to form stitches on the sewing material 110.

When the operator presses the button portion 71 to cause the operation device 70 to act on the clutch mechanism 60, the telescopic rod 72 of the operation device 70 extends into the stopper groove 613 to push the slide plate 62, and the tooth portion 621 of the slide plate 62 is separated from the ratchet 63. Then, the operator manually rotates the hand wheel 130, the hand wheel 130 drives the main shaft 10 to rotate together through an angle, the main shaft 10 drives the ratchet 63 and the needle bar mechanism 20 to move together, the connecting wheel 61 is kept still under the action of the operating device 70, and then the first gear 52 is also kept still, so that the transmission mechanism 50, the lower shaft 30 and the rotating shuttle 40 are all in a static state, thereby adjusting the motion relationship between the needle 28 and the rotating shuttle 40, and delaying the motion of the rotating shuttle 40 relative to the needle 28 to achieve the purpose of enlarging the thread loop 120 in the subsequent sewing. After the adjustment is completed, the button portion 71 of the operating device 70 is released, the telescopic rod 72 of the operating device 70 is separated from the stopping groove 613, and the tooth-clamping portion 621 of the slide 62 is engaged with the ratchet 63 again under the action of the return spring 64.

Preferably, as shown in fig. 5 and 6, the shaft member 80 is fixedly provided with a retaining ring 65, and the retaining ring 65 is located on a side of the gear member 90 opposite to the connecting wheel 61 and is in abutting engagement with the gear member 90 to limit the axial position of the gear member 90. As shown in fig. 9 and 10, the connecting portion 91 of the gear member 90 is provided with a pair of parallel connecting planes 92, the connecting groove 611 of the connecting wheel 61 extends straight and radially through the connecting wheel 61, and the connecting planes 92 are in contact engagement with the groove wall surfaces of the connecting groove 611.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a rotating shuttle colludes sewing machine of line time adjustable, includes main shaft (10), by main shaft (10) drive motion's needle bar mechanism (20), be on a parallel with lower axle (30) of main shaft (10), by lower axle (30) drive motion's rotating shuttle (40) and connect drive mechanism (50) between main shaft (10) and lower axle (30), its characterized in that: the sewing machine further comprises a clutch mechanism (60) and an operating device (70) arranged on a machine shell of the sewing machine, wherein the clutch mechanism (60) is connected between the main shaft (10) and the transmission mechanism (50), or connected in the transmission mechanism (50), or connected between the transmission mechanism (50) and the lower shaft (30);

when the operating device (70) does not act on the clutch mechanism (60), the clutch mechanism (60) enables power transmission between two components connected by the clutch mechanism (60); when the operating device (70) acts on the clutch mechanism (60), the clutch mechanism (60) enables no power transmission between two components connected by the clutch mechanism (60).

2. The sewing machine of claim 1, wherein: drive mechanism (50) include vertical axis (51) that extend from top to bottom, establish first gear (52) on main shaft (10), fix second gear (53) in vertical axis (51) upper end, fix third gear (54) at vertical axis (51) lower extreme and fix fourth gear (55) on lower shaft (30), first gear (52) and second gear (53) meshing, third gear (54) and fourth gear (55) meshing, clutching mechanism (60) are connected between main shaft (10) and first gear (52).

3. The sewing machine of claim 1, wherein: drive mechanism (50) including vertical axis (51) that extend from top to bottom, fix first gear (52) on main shaft (10), establish second gear (53) in vertical axis (51) upper end, fix third gear (54) at vertical axis (51) lower extreme and fix fourth gear (55) on lower shaft (30), first gear (52) and second gear (53) meshing, third gear (54) and fourth gear (55) meshing, clutching mechanism (60) are connected between vertical axis (51) and second gear (53).

4. The sewing machine of claim 1, wherein: drive mechanism (50) include vertical axis (51) that extend from top to bottom, fix first gear (52) on main shaft (10), fix second gear (53) in vertical axis (51) upper end, overlap and establish third gear (54) at vertical axis (51) lower extreme and fix fourth gear (55) on lower shaft (30), first gear (52) and second gear (53) meshing, third gear (54) and fourth gear (55) meshing, clutching mechanism (60) are connected between vertical axis (51) and third gear (54).

5. The sewing machine of claim 1, wherein: drive mechanism (50) are including vertical axis (51) that extend from top to bottom, fix first gear (52) on main shaft (10), fix second gear (53) in vertical axis (51) upper end, fix third gear (54) at vertical axis (51) lower extreme and establish fourth gear (55) on lower shaft (30) with the cover, first gear (52) and second gear (53) meshing, third gear (54) and fourth gear (55) meshing, clutching mechanism (60) are connected between lower shaft (30) and fourth gear (55).

6. The sewing machine according to any one of claims 2 to 5, characterized in that: defining the two components connected by the clutch mechanism (60) as a shaft member (80) and a gear member (90), the shaft member (80) being in rotational engagement with the gear member (90); the clutch mechanism (60) comprises a connecting wheel (61) rotationally matched with the shaft component (80), a sliding sheet (62) with a clamping tooth part (621), and a ratchet wheel (63) fixed on the shaft component (80), wherein two ends of the connecting wheel (61) are respectively provided with a connecting groove (611) and a first sliding groove (612), the gear component (90) is provided with a connecting part (91) in surface contact fit with the connecting groove (611), and the sliding sheet (62) is positioned in the first sliding groove (612) and is in sliding fit with the first sliding groove (612);

when the operating device (70) does not act on the clutch mechanism (60), a clamping tooth part (621) on the sliding sheet (62) is meshed with a ratchet wheel (63); when the operating device (70) acts on the clutch mechanism (60), the clamping tooth part (621) on the sliding sheet (62) is separated from the ratchet wheel (63).

7. The sewing machine of claim 6, wherein: a stop groove (613) is formed in the outer peripheral surface of the connecting wheel (61), the stop groove (613) is communicated with the first sliding groove (612), one end, away from the clamping tooth part (621), of the sliding sheet (62) is higher than the groove bottom of the stop groove (613), and the operating device (70) is provided with a button part (71) located outside the machine shell and a telescopic rod (72) driven by the button part (71) to move; when the button part (71) is pressed down, the telescopic rod (72) extends into the stop groove (613) and pushes the sliding piece (62), so that the clamping tooth part (621) on the sliding piece (62) is separated from the ratchet wheel (63).

8. The sewing machine of claim 6, wherein: the clutch mechanism (60) further comprises a reset spring (64) mounted on the connecting wheel (61), one end of the reset spring (64) acts on the clamping tooth part (621) and applies acting force to the clamping tooth part (621) towards the ratchet wheel (63) along the extending direction of the first sliding groove (612).

9. The sewing machine of claim 1, wherein: needle bar mechanism (20) include needle bar crank (21), take-up crank (22), needle bar connecting rod (23), be fixed in guide rail (24), slider (25) of sewing machine casing, needle bar (26) that extend from top to bottom, fix connector (27) on needle bar (26) and install eedle (28) at needle bar (26) lower extreme, needle bar crank (21) are fixed in main shaft (10) and link to each other with take-up crank (22), the both ends of needle bar connecting rod (23) are articulated with take-up crank (22) and connector (27) respectively, the tip and the slider (25) normal running fit of connector (27), open in guide rail (24) and extend from top to bottom and with slider (25) sliding fit's second spout (241).

10. The sewing machine of claim 1, wherein: the rotating shuttle (40) is fixed with the lower shaft (30).