CN215925276U

CN215925276U - Feeding and needle swinging cooperative device of sewing machine

Info

Publication number: CN215925276U
Application number: CN202122386597.6U
Authority: CN
Inventors: 洪恭火; 洪子婷; 柯福炜
Original assignee: Wenzhou Huofeng Electric Technology Co ltd
Current assignee: Wenzhou Huofeng Electric Technology Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-01
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a feeding and swing needle cooperative device of a sewing machine, which comprises a rack, an upper feeding device, an upper feeding motor for driving the upper feeding device, a lower feeding motor for driving the lower feeding device and a swing needle swinging mechanism, wherein the upper feeding device and the upper feeding motor are arranged on the rack, the lower feeding device and the lower feeding motor are arranged on the rack, the swing needle swinging mechanism comprises a swing needle seat, a swinging shaft, an eccentric wheel component, a transmission mechanism and a reversing mechanism, the eccentric wheel component is arranged on the rack and connected with a main motor, the swinging shaft is arranged on the rack, the swing needle seat is fixed on the swinging shaft, the transmission mechanism is connected with the eccentric wheel component and the swinging shaft, and the reversing mechanism is connected with the transmission mechanism. The swing needle swinging mechanism is driven by a main motor of the sewing machine in a transmission way, the upper feeding device and the lower feeding device are driven by independent motors, a complex transmission mechanism is not needed to be connected with the main motor, and the efficiency is higher. The pendulum needle is driven by the main motor and is more suitable for the swinging action of the pendulum needle.

Description

Feeding and needle swinging cooperative device of sewing machine

Technical Field

The utility model relates to the field of sewing machinery, in particular to a feeding and needle swinging cooperative device of a sewing machine.

Background

In the sewing machine, the rotation angles of the upper cloth feeding wheel and the lower cloth feeding wheel and the swing angle of the sewing needle are matched together, so that the sewing operation can be completed. Generally, when sewing products, reinforcement is repeated for 2-4 times at the beginning and the end, and a cloth feeding wheel is needed to feed materials in the forward and reverse directions during reinforcement, so that the problem of the overlapping rate of needle holes during forward and reverse sewing, namely the rate of heavy stitches, is caused. In mechanical sewing machines, the components are driven by a main motor of the sewing machine through a series of transmission mechanisms such as gears, connecting rods and the like, some deviation exists in the gear meshing process, the perfect needle weight ratio cannot be achieved, the structure is complex, and the noise is high in the operation process.

In the design of the stepping motor epitaxy, three stepping motors are adopted to respectively control the swinging of the upper cloth feeding wheel, the lower cloth feeding wheel and the sewing needle, however, in the existing sewing production, the frequency of the back-and-forth swinging of the sewing needle is more than 3000 per minute, and the stepping motor can be overheated to stop when driving the sewing needle, so that the requirement of normal production cannot be met.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a feeding and needle swinging cooperative device of a sewing machine, which has simple structure and high efficiency.

The utility model provides the following technical scheme: a feeding and swing needle cooperative device of a sewing machine comprises a rack, an upper feeding device, an upper feeding motor for driving the upper feeding device, a lower feeding motor for driving the lower feeding device and a swing needle swinging mechanism, wherein the upper feeding device and the upper feeding motor are arranged on the rack, the lower feeding device and the lower feeding motor are arranged on the rack, the swing needle swinging mechanism comprises a swing needle seat, a swinging shaft, an eccentric wheel component, a transmission mechanism and a reversing mechanism, the eccentric wheel component is arranged on the rack and connected with a main motor, the swinging shaft is arranged on the rack, the swing needle seat is fixed on the swinging shaft, the transmission mechanism is connected with the eccentric wheel component and the swinging shaft, and the reversing mechanism is connected with the transmission mechanism.

Preferably, the transmission mechanism comprises a transmission shaft, a first connecting rod and a guide structure for guiding the swing angle of the first connecting rod, the transmission shaft is mounted on the rack, a connecting arm is connected to the side wall of the swing shaft, a transmission sleeve is sleeved on the transmission shaft, the reversing mechanism is connected with the transmission sleeve, the connecting arm is connected with the transmission sleeve, one end of the first connecting rod is hinged to the output end of the eccentric wheel assembly, and the other end of the first connecting rod is connected with the transmission shaft.

Preferably, guide structure includes the adjusting collar, second connecting rod and moment of torsion input mechanism, the rotatable installation in the frame of adjusting collar, moment of torsion input mechanism installs in the frame and is connected with the adjusting collar, be provided with the arc track in the adjusting collar, be connected with the gyro wheel on the first connecting rod, the gyro wheel sets up in the arc track, the one end and the first connecting rod of second connecting rod are connected, the other end is connected with the transmission shaft, eccentric wheel mechanism's output and gyro wheel are connected, the gyro wheel, the output of first connecting rod and eccentric wheel mechanism is through same root axis rotatable coupling each other.

Preferably, the transmission mechanism comprises a swing rod, the swing rod is rotatably arranged on the rack, one end of the swing rod is connected with the eccentric wheel assembly, and the other end of the swing rod is connected with the transmission shaft.

Preferably, the swing rod is sleeved with a sliding sleeve, the sliding sleeve is provided with a swing shaft, the swing rod uses the swing shaft as a swing center, the swing shaft is sleeved with a sliding block, the rack is provided with a sliding groove, the sliding block is installed on the sliding groove, and the rack is provided with a moving mechanism for moving the sliding sleeve.

Preferably, the moving mechanism comprises a knob, a worm and a worm wheel, the worm wheel and the worm are rotatably installed on the rack and are meshed with each other, the knob is coaxially fixed on the worm, a shifting fork is arranged on the side wall of the worm wheel, a shifting block is arranged on the sliding sleeve, and the shifting fork is connected with the shifting block.

Preferably, the rack is provided with a zero return pushing mechanism, the worm comprises a core rod, a threaded sleeve and a spring, the threaded sleeve is sleeved outside the core rod and rotates synchronously with the core rod, the knob is fixedly connected with the core rod, the spring is arranged between the threaded sleeve and the rack, and the zero return pushing mechanism is arranged on the rack and connected with the threaded sleeve.

The utility model has the beneficial effects that: when the automatic feeding device works, the upper feeding motor drives the upper feeding device to operate, and the lower feeding motor drives the lower feeding mechanism to operate. The swing needle swinging mechanism is driven by a main motor of the sewing machine through transmission among the eccentric wheel assembly, the first connecting rod, the second connecting rod, the transmission sleeve and the connecting arm, so that the swing needle seat drives the swing needle to swing. The pendulum needle is driven by the main motor, so that the pendulum needle is more suitable for swinging action, and the problem that the step motor cannot drive the pendulum needle for a long time is solved.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is a structural view of the first embodiment;

FIG. 3 is a structural view of the second embodiment;

FIG. 4 is a block diagram of the adjustment sleeve, the eccentric wheel assembly and the first link;

FIG. 5 is a structural view of a third embodiment;

fig. 6 is a structural view of the fourth embodiment.

Detailed Description

The utility model will be further described in detail with reference to the following examples, which are given in the accompanying drawings.

Referring to fig. 1, 2 and 4, a first embodiment of the present invention: a feeding and swing needle cooperative device of a sewing machine comprises a rack 1, an upper feeding device 2, an upper feeding motor for driving the upper feeding device 2, a lower feeding device 3, a lower feeding motor for driving the lower feeding device and a swing needle swing mechanism, wherein the upper feeding device 2 and the upper feeding motor are installed on the rack 1, the lower feeding device 3 and the lower feeding motor are installed on the rack 1, the swing needle swing mechanism comprises a swing needle seat 41, a swing shaft 42, an eccentric wheel assembly 46, a transmission mechanism and a reversing mechanism, the eccentric wheel assembly 46 is installed on the rack 1 and connected with a main motor, the swing shaft 42 is installed on the rack 1, the swing needle seat 41 is fixed on the swing shaft 42, the transmission mechanism is connected with the eccentric wheel assembly 46 and the swing shaft 42, and the reversing mechanism is connected with the transmission mechanism.

The transmission mechanism comprises a transmission shaft 43, a first connecting rod 51 and a guide structure for guiding the swing angle of the first connecting rod 51, the transmission shaft 43 is installed on the rack 1, a connecting arm 44 is connected to the side wall of the swing shaft 42, a transmission sleeve 45 is sleeved on the transmission shaft 43, the reversing mechanism is connected with the transmission sleeve 45, the connecting arm 44 is connected with the transmission sleeve 45, one end of the first connecting rod 51 is hinged to the output end of the eccentric wheel assembly 46, and the other end of the first connecting rod is connected with the transmission shaft 43.

Further, the guide structure comprises an adjusting sleeve 54, a second connecting rod 52 and a torque input mechanism, the adjusting sleeve 54 is rotatably mounted on the frame 1, the torque input mechanism is mounted on the frame 1 and connected with the adjusting sleeve 54, an arc-shaped track 55 is arranged in the adjusting sleeve 54, a roller 53 is connected to the first connecting rod 51, the roller 53 is arranged in the arc-shaped track 55, one end of the second connecting rod 52 is connected with the first connecting rod 51, the other end of the second connecting rod is connected with the transmission shaft 43, the output end of the eccentric wheel mechanism 5 is connected with the roller 53, and the roller 53, the first connecting rod 51 and the output end of the eccentric wheel mechanism 5 are rotatably connected with each other through the same shaft.

When the device works, the upper feeding motor drives the upper feeding device 2 to operate, and the lower feeding motor drives the lower feeding mechanism to operate. The swing needle swinging mechanism is driven by a main motor of the sewing machine through transmission among the eccentric wheel assembly 46, the first connecting rod 51, the second connecting rod 52, the transmission sleeve 45 and the connecting arm 44, so that the swing needle seat 41 drives the swing needle to swing, therefore, the upper feeding device 2 and the lower feeding device 3 are driven by independent motors, a complex transmission mechanism is not needed to be connected with the main motor, the efficiency is higher, and the transmission structure is simplified, and the control on the upper feeding device 2 and the lower feeding device 3 is more accurate. The pendulum needle is driven by the main motor, so that the pendulum needle is more suitable for swinging action, and the problem that the step motor cannot drive the pendulum needle for a long time is solved.

The position of the arc-shaped track 55 can be adjusted by arranging the adjusting sleeve 54, so that the swinging amplitude of the first connecting rod 51 and the second connecting rod 52 changes along with the change of the position of the arc-shaped track 55, the swinging angle of the needle swinging seat 41 is further adjusted, then the running speed of the upper feeding motor and the lower feeding motor is matched with the swinging angle of the needle swinging seat 41 to be adjusted, the swinging linear speed of the needle swinging can be matched with the feeding linear speeds of the upper feeding device 2 and the lower feeding device 3, and the sewing needle can have better heavy needle rate.

The reversing mechanism adopts structures such as an electromagnet, an air cylinder and the like, adopts the reversing mechanism in the prior art, a sliding hole is arranged in the transmission sleeve 45, and the reversing mechanism pushes the transmission sleeve 45 to move, so that the swinging track of the transmission sleeve 45 can be changed, the swinging angle interval of the swinging shaft 42 is changed, and the interval of the swinging angle of the sewing needle is changed to match with the forward and reverse sewing actions.

The torque input mechanism can be a stepping motor or a worm gear 67 and worm 66 mechanism shown in fig. 5 and 6, so that automatic or manual adjustment can be realized, and the two mechanisms can also be used together, so that the effect of simultaneous use of manual and automatic can be realized.

As shown in fig. 3, in the second embodiment of the present invention, the first switching shaft 71 is disposed between the first link 51 and the second link 52 to further limit the guiding of the first link 51 and the second link 52, so that the first link 51 and the second link 52 can operate more stably. The torque input mechanism is connected to the adjustment sleeve 54 by a third link 72, which rotates the adjustment sleeve 54.

Referring to fig. 5, in a third embodiment of the present invention, the transmission mechanism includes a swing link 61, the swing link 61 is rotatably mounted on the frame 1, one end of the swing link 61 is connected to the eccentric wheel assembly 46, and the other end is connected to the transmission shaft 43.

The swing rod 61 is sleeved with a sliding sleeve 62, swing shafts 63 are arranged on two sides of the sliding sleeve 62, the swing rod 61 takes the swing shafts 63 as a swing center, a sliding block 64 is sleeved outside the swing shafts 63, a sliding groove is formed in the rack 1, the sliding block 64 is installed on the sliding groove, and a moving mechanism used for moving the sliding sleeve 62 is installed on the rack 1. The pendulum shaft 63 and the slider 64 can operate only by a single side, but the operation stability is slightly poor.

The moving mechanism comprises a knob 65, a worm 66 and a worm gear 67, the worm gear 67 and the worm 66 are rotatably mounted on the rack 1 and are meshed with each other, the knob 65 is coaxially fixed on the worm 66, a shifting fork 68 is arranged on the side wall of the worm gear 67, a shifting block 69 is arranged on the sliding sleeve 62, and the shifting fork 68 is connected with the shifting block 69.

In this embodiment, the eccentric wheel assembly 46 drives the swing rod 61 to swing, so as to drive the transmission shaft 43 to swing, and drive the swing needle seat 41 to swing. When the swing angle of the pendulum needle seat 41 is adjusted, the sliding sleeve 62 is driven to slide by the knob 65, the worm 66, the worm wheel 67 and the shifting fork 68, and the position of the pendulum shaft 63 is changed, so that the swing amplitude of the two ends of the pendulum rod 61 is changed, the swing amplitude of the transmission shaft 43 and the swing amplitude of the swing shaft 42 are changed, and the swing amplitude of the pendulum needle seat 41 is changed.

Referring to fig. 6, in the fourth embodiment of the present invention, the fourth link 73 and the second converting shaft 74 are disposed between the swing link 61 and the transmission shaft 43, so as to better limit the swing link 61 and meet the installation requirements of different model sizes.

The machine frame 1 is provided with a zero return pushing mechanism 664, the worm 66 comprises a core rod 661, a threaded sleeve 662 and a spring 663, the threaded sleeve 662 is sleeved outside the core rod 661 and rotates synchronously with the core rod 661, the knob 65 is fixedly connected with the core rod 661, the spring 663 is arranged between the threaded sleeve 662 and the machine frame 1, and the zero return pushing mechanism 664 is arranged on the machine frame 1 and connected with the threaded sleeve 662.

When finishing weaving, need carry out a needle lock needle operation, at this moment, return to zero pushing mechanism 664 promotes swivel nut 662, drives worm wheel 67 rapid drainge, makes the cover 62 that slides slide fast, and pendulum shaft 63 moves the junction of pendulum rod 61 and transmission shaft 43, when making the pendulum rod 61 swing, can not drive the swing of transmission shaft 43, and simultaneously, material feeding motor and lower material feeding motor stop work are gone up in the cooperation, just can make the sewing needle fall two needles in same position, accomplish accurate lock needle action. Here, the worm 66 can also be driven by a stepping motor to achieve automatic adjustment and zero return, or the stepping motor and the knob 65 can be used simultaneously, and have functions of manual adjustment and automatic adjustment. The zero-returning pushing mechanism 664 can adopt a cylinder, an electromagnet and the like.

In the first and second embodiments, the stepping motor can also drive the adjusting sleeve 54 to return to zero quickly, so that the swing track of the first link 51 coincides with the radius of the arc-shaped track 55, the first link 51 does not drive the second link 52 to swing when swinging, and the upper feeding motor and the lower feeding motor are matched to stop, thereby completing the precise needle locking.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a feeding and pendulum needle of sewing machine is in coordination with device which characterized in that: comprises a frame (1), an upper feeding device (2), an upper feeding motor for driving the upper feeding device (2), a lower feeding device (3), a lower feeding motor for driving the lower feeding device and a swing needle swing mechanism, the upper feeding device (2) and the upper feeding motor are arranged on the frame (1), the lower feeding device (3) and the lower feeding motor are arranged on the frame (1), the swing needle swinging mechanism comprises a swing needle seat (41), a swinging shaft (42), an eccentric wheel component (46), a transmission mechanism and a reversing mechanism, the eccentric wheel assembly (46) is arranged on the frame (1) and is connected with a main motor, the swing shaft (42) is arranged on the frame (1), the swing needle seat (41) is fixed on the swing shaft (42), the transmission mechanism is connected with the eccentric wheel assembly (46) and the swinging shaft (42), and the reversing mechanism is connected with the transmission mechanism.

2. The feeding and oscillating needle cooperative device of a sewing machine according to claim 1, wherein: drive mechanism includes transmission shaft (43), first connecting rod (51) and is used for guiding first connecting rod (51) swing angle's guide structure, install in frame (1) transmission shaft (43), be connected with linking arm (44) on the lateral wall of swing axle (42), the cover is equipped with drive sleeve (45) on transmission shaft (43), reversing mechanism is connected with drive sleeve (45), linking arm (44) are connected with drive sleeve (45), the one end of first connecting rod (51) is articulated with the output of eccentric wheel subassembly (46), and the other end is connected with transmission shaft (43).

3. The feeding and oscillating needle cooperative device of a sewing machine according to claim 2, wherein: the guide structure comprises an adjusting sleeve (54), a second connecting rod (52) and a torque input mechanism, wherein the adjusting sleeve (54) is rotatably installed on the rack (1), the torque input mechanism is installed on the rack (1) and connected with the adjusting sleeve (54), an arc-shaped track (55) is arranged in the adjusting sleeve (54), a roller (53) is connected onto the first connecting rod (51), the roller (53) is arranged in the arc-shaped track (55), one end of the second connecting rod (52) is connected with the first connecting rod (51), the other end of the second connecting rod is connected with the transmission shaft (43), the output end of the eccentric wheel mechanism (5) is connected with the roller (53), and the output ends of the roller (53), the first connecting rod (51) and the eccentric wheel mechanism (5) are rotatably connected with each other through the same shaft.

4. The feeding and oscillating needle cooperative device of a sewing machine according to claim 1, wherein: the transmission mechanism comprises a swing rod (61), the swing rod (61) is rotatably mounted on the rack (1), one end of the swing rod (61) is connected with the eccentric wheel assembly, and the other end of the swing rod is connected with a transmission shaft.

5. The feeding and oscillating needle cooperative device of a sewing machine according to claim 4, wherein: the cover is equipped with and slides cover (62) on pendulum rod (61), it is provided with pendulum shaft (63) on cover (62) to slide, pendulum rod (61) use pendulum shaft (63) as the swing center, pendulum shaft (63) overcoat is equipped with slider (64), be provided with the spout in the frame, slider (64) are installed on the spout, install the moving mechanism who is used for removing cover (62) that slides in the frame.

6. The feeding and oscillating needle cooperative device of the sewing machine as claimed in claim 5, wherein: moving mechanism includes knob (65), worm (66) and worm wheel (67), worm wheel (67) and worm (66) are rotated and are installed in the frame and intermeshing, knob (65) coaxial fixation is on worm (66), be provided with shift fork (68) on the lateral wall of worm wheel (67), be provided with shifting block (69) on slip cover (62), shift fork (68) are connected with shifting block (69).

7. The feeding and oscillating needle cooperative device of the sewing machine as claimed in claim 6, wherein: install return to zero pushing mechanism (664) in the frame, worm (66) include core bar (661), swivel nut (662) and spring (663), swivel nut (662) cover outside core bar (661) and rotate with core bar (661) is synchronous, knob (65) and core bar (661) fixed connection, spring (663) set up between swivel nut (662) and frame, return to zero pushing mechanism (664) and install in the frame and be connected with swivel nut (662).