WO2020015042A1

WO2020015042A1 - Noise reduction mechanism for sewing machine electromagnet

Info

Publication number: WO2020015042A1
Application number: PCT/CN2018/101007
Authority: WO
Inventors: 季锴
Original assignee: 苏州锴诚缝制设备有限公司
Priority date: 2018-07-19
Filing date: 2018-08-17
Publication date: 2020-01-23
Also published as: CN108642740A

Abstract

A noise reduction mechanism for a sewing machine electromagnet comprises an electromagnet housing (1) and a cushioning seat (2). An iron core (3) passes through the electromagnet housing (1), and is connected to the electromagnet housing (1). An outer frame (4) is provided at an outer side of the electromagnet housing (1). The iron core (3) comprises a head portion (5), an intermediate portion (6), and a tail portion (7). The head portion (5) passes through a top portion of the electromagnet housing (1) and a top portion of the outer frame (4), and the tail portion (7) passes through a bottom portion of the electromagnet housing (1) and a bottom portion of the outer frame (4). An inner support (8) is further provided in the electromagnet housing (1). A top portion and a bottom portion of the inner support (8) are respectively provided with an upper engagement block (9) and a lower engagement block (10). The upper engagement block (9) is provided on the outer side of the electromagnet housing (1), and a bottom portion of the upper engagement block (9) is provided with a first rubber gasket (11). A first shock-absorbing spring (12) is connected to a bottom portion of the lower engagement block (10). The mechanism effectively reduces impact forces between the iron core (3), the outer frame (4), and the electromagnet housing (1) and an impact force between a nut (14) and an outer sidewall of the electromagnet housing (1), reduces noise and wear of parts, extends a service life of an electromagnet, and improves the quality of a product.

Description

Noise reduction mechanism of sewing electromagnet

Technical field

The invention relates to a noise reduction mechanism of a sewing electromechanical magnet, and belongs to the technical field of sewing machines.

Background technique

When the sewing machine is in forward or reverse stitching, the electromagnet telescopically drives the feed adjustment shaft to rotate, and drives the feed adjuster to swing by adjusting the crank and the feed swing lever. The feed adjustment stud is limited by the feed adjuster to the needle distance limit. The structure of the electromagnet is: It includes a shell part and a frame arranged outside the shell part, a coil is arranged in the shell part, an iron core penetrates the shell part and the head and tail parts respectively extend out of the frame. The electromagnet of this structure has the following defects: the electromagnet When it is extended, the iron core circular table in the electromagnet collides with the inner wall of the electromagnet housing. When it is contracted, the nut will collide with the outer wall of the electromagnet housing. Impact, the above-mentioned various impacts generate a lot of noise, and at the same time, long-term impacts will cause wear and tear, and the accuracy of the parts will be reduced.

Summary of the invention

The invention proposes a sewing electromechanical magnet noise reduction mechanism, which solves the problem that when the electromagnet in the sewing machine's forward and reverse stitching is extended, the iron core circular table surface in the electromagnet collides with the inner side wall of the electromagnet housing. The outer side wall of the iron shell impacts, and the feed adjustment studs will collide with the feed adjuster when the forward and reverse stitches are switched. The above-mentioned various impacts generate a lot of noise, and at the same time, the long-term impact will cause wear, and the accuracy of the parts will decrease after the parts wear.

In order to solve the above technical problems, the present invention provides the following technical solutions:

The invention relates to a sewing electromechanical magnet noise reduction mechanism, which includes an electromagnet housing and a buffer seat, an iron core is connected through the electromagnet housing, an outer frame is provided on the outer side of the electromagnet housing, and the iron core includes a head. Part, middle part and tail part, the head part penetrates the electromagnet case and the top of the outer frame, and the tail part penetrates the electromagnet case and the bottom of the outer frame, inside the electromagnet case An inner support is also provided. The top and the bottom of the inner support are respectively provided with an upper clamping block and a lower clamping block. The upper clamping block is disposed outside the electromagnet housing, and the bottom of the upper clamping block is provided. There is a first rubber pad, a first damping spring is connected to the bottom of the lower clamping block, the middle portion is connected to the bottom of the first damping spring, and an electromagnet joint and a nut are provided on the top of the iron core, and the nut The bottom is provided with a second rubber pad, one side of the tail is connected with an L-shaped rod, the L-shaped rod penetrates the bottom of the buffer seat and extends into the buffer seat, and the top of the L-shaped rod is connected with a moving plate, The top of the moving plate is connected to the top of the inner cavity of the buffer seat through a second shock-absorbing spring. The bottom plate is connected by a third damper spring seat bottom cushion of the lumen.

As a preferred technical solution of the present invention, one side of the buffer seat is fixedly connected to the outer frame.

As a preferred technical solution of the present invention, the diameters of the head portion, the middle portion, and the tail portion are sequentially reduced, and the central axes of the head portion, the middle portion, and the tail portion are located on the same vertical line.

As a preferred technical solution of the present invention, the number of the second damping spring and the third damping spring are both four.

As a preferred technical solution of the present invention, a honeycomb sound absorbing plate is further provided on the top of the electromagnet housing, and the inside of the honeycomb sound absorbing plate is filled with sound absorbing cotton.

As a preferred technical solution of the present invention, sliding grooves are provided on both sides of the inner wall of the buffer seat, and two ends of the moving plate are slidably connected with the sliding grooves.

The beneficial effect achieved by the present invention is that when the iron core is extended or retracted, the first damping spring is activated to buffer, and at the same time, the first rubber pad plays a role of reducing noise, and when the nut hits the upper block, The second rubber pad plays a role of buffering and reducing noise, and when the iron core moves, the moving plate follows the movement, and the second damping spring and the third damping spring can also play a role of buffering and reducing noise. It can absorb the noise generated by the impact of some iron cores. The invention can effectively reduce the impact force between the iron core and the frame and the electromagnet housing, the impact force between the nut and the outer side wall of the electromagnet shell, reduce noise, reduce part wear, and prolong The service life of the electromagnet improves the quality of the product.

Background technique

The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation on the present invention. In the drawings:

FIG. 1 is a structural diagram of the present invention;

FIG. 2 is an internal structure diagram of an electromagnet case according to the present invention.

In the picture: 1. Electromagnet housing; 2. Buffer seat; 3. Iron core; 4. Outer frame; 5. Head; 6. Middle part; 7. Tail part; 8. Inner support; 9. Upper block 10, the lower clamping block; 11, the first rubber pad; 12, the first shock-absorbing spring; 13, the electromagnet joint; 14, the nut; 15, the second rubber pad; 16, the L-shaped rod; 17, the moving plate; 18, the second shock-absorbing spring; 19, the third shock-absorbing spring; 20, a honeycomb sound-absorbing plate.

detailed description

The following describes preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Example 1

As shown in FIGS. 1-2, the present invention provides a sewing electromechanical magnet noise reduction mechanism, which includes an electromagnet housing 1 and a buffer seat 2. The electromagnet housing 1 is internally connected with an iron core 3, and the electromagnetic An outer frame 4 is provided on the outer side of the iron casing 1, and the iron core 3 includes a head portion 5, a middle portion 6, and a tail portion 7, and the head portion 5 penetrates the top of the electromagnet casing 1 and the outer frame 4, The tail portion 7 runs through the bottom of the electromagnet housing 1 and the outer frame 4. The electromagnet housing 1 is also provided with an inner support 8, and the top and bottom of the inner support 8 are provided respectively. An upper clamping block 9 and a lower clamping block 10, the upper clamping block 9 is disposed outside the electromagnet housing 1, and a bottom of the upper clamping block 9 is provided with a first rubber pad 11, and a bottom of the lower clamping block 10 A first damping spring 12 is connected, the bottom of the first damping spring 12 is connected to the middle portion 6, an electromagnet joint 13 and a nut 14 are provided on the top of the iron core 3, and a second is provided on the bottom of the nut 14. Rubber pad 15, one side of the tail portion 7 is connected to an L-shaped rod 16, the L-shaped rod 16 penetrates the bottom of the buffer seat 2 and extends to the inside of the buffer seat 2, and the top of the L-shaped rod 16 is connected to a moving plate 17 , Said A top plate 17 connected to the top of the seat cushion 2 through a second lumen of the damper spring 18, the moving plate 17 through the bottom of the third damper spring 19 connected to the bottom 2 of the seat cushion lumen.

One side of the buffer seat 2 is fixedly connected to the outer frame 4 to make the buffer seat 2 relatively stable. The diameters of the head 5, the middle portion 6, and the tail portion 7 decrease in order, and the head 5, the middle portion 6 and the central axis of the tail portion 7 are located on the same vertical line. Since the first damping spring 12 is connected to the top of the middle portion 6, the impact of the middle portion 6 on the inner support 8 is avoided. The number of the third shock-absorbing springs 19 are four, so that the spring buffering force received by the moving plate 17 is balanced when the moving plate 17 is moved. A honeycomb sound-absorbing plate 20 is also provided on the top of the electromagnet housing 1, and the honeycomb sound-absorbing plate 20 The interior is filled with sound-absorbing cotton, which can absorb part of the noise generated by the impact of the iron core 3. The two sides of the inner wall of the buffer seat 2 are provided with sliding grooves. The two ends of the moving plate 17 are slidably connected to the sliding grooves. The moving plate 17 can be conveniently Slide in the chute.

In use of the present invention, when the iron core 3 is extended or retracted, the first damping spring 12 is activated to buffer, and at the same time, the first rubber pad 11 plays a role of reducing noise, and when the nut 14 hits the upper clamping block 9 At this time, the second rubber pad 15 plays a role of buffering and reducing noise, and when the iron core 3 moves, the moving plate 17 follows the movement, and the second damping spring 18 and the third damping spring 19 also play a role of buffering and reducing noise. The honeycomb sound absorbing plate 20 provided at the same time can absorb the noise generated by the impact of part of the iron core 3.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will still be possible for those skilled in the art to make changes to the present invention. The technical solutions described in the foregoing embodiments are modified, or some technical features are equivalently replaced. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

A sewing machine electromagnet noise reduction mechanism includes an electromagnet housing (1) and a buffer seat (2), which is characterized in that an iron core (3) is connected through the electromagnet housing (1), and the electromagnetic An outer frame (4) is provided on the outside of the iron casing (1), the iron core (3) includes a head (5), a middle portion (6), and a tail (7), and the head (5) runs through the The electromagnet housing (1) and the top of the outer frame (4), the tail (7) runs through the bottom of the electromagnet housing (1) and the outer frame (4), the electromagnet housing The body (1) is also provided with an inner support (8). The top and bottom of the inner support (8) are respectively provided with an upper clamping block (9) and a lower clamping block (10). 9) It is arranged outside the electromagnet housing (1), and a first rubber pad (11) is provided at the bottom of the upper clamping block (9), and a first shock absorption is connected to the bottom of the lower clamping block (10). A spring (12), the bottom of the first damping spring (12) is connected to the middle portion (6), and an electromagnet joint (13) and a nut (14) are provided on the top of the iron core (3), (14) A second rubber pad (15) is provided at the bottom, an L-shaped rod (16) is connected to one side of the tail (7), and the L-shaped rod (16) runs through the bottom of the buffer seat (2) and extends to The buffer seat (2) Inside, the top of the L-shaped rod (16) is connected to a moving plate (17), and the top of the moving plate (17) is connected to the top of the inner cavity of the buffer seat (2) through a second damping spring (18), The bottom of the moving plate (17) is connected to the bottom of the inner cavity of the buffer seat (2) through a third damping spring (19).
The noise reduction mechanism of a sewing electromechanical magnet according to claim 1, wherein one side of the buffer seat (2) is fixedly connected to the outer frame (4).
The noise reduction mechanism for a sewing electromagnet according to claim 1, wherein the diameters of the head (5), the middle portion (6) and the tail portion (7) decrease in order, and the head ( 5) The central axis of the middle part (6) and the tail part (7) are located on the same vertical line.
The noise reduction mechanism for a sewing electromagnet according to claim 1, wherein the number of the second damping springs (18) and the third damping springs (19) are four.
The noise reduction mechanism for a sewing electromechanical magnet according to claim 1, wherein a honeycomb sound absorption plate (20) is further provided on the top of the electromagnet housing (1), and the honeycomb sound absorption plate (20) is filled inside There is sound-absorbing cotton.
The noise reduction mechanism for a sewing electromechanical magnet according to claim 1, characterized in that both sides of the inner wall of the buffer seat (2) are provided with sliding grooves, and both ends of the moving plate (17) are slidably connected with the sliding grooves.