CN210215817U - Low-noise electromagnet of sewing machine - Google Patents

Abstract

The utility model relates to a sewing machine low noise electro-magnet, including casing, iron core and coil, the iron core stretches out from the casing front end, and the tip that the casing was stretched out to the iron core is equipped with the dog, and when the iron core was withdrawn in the casing, the dog was contradicted with the preceding terminal surface of casing, and the cover is equipped with first sealing washer and second sealing washer on the iron core respectively, first sealing washer, second sealing washer interval set up, and all contradict with shells inner wall and form the cushion chamber, first sealing washer inner wall is equipped with a bleeder vent at least. Adopt above-mentioned technical scheme, the utility model provides a sewing machine low noise electro-magnet can reach effective, direct effect of falling the sound.

Description

Low-noise electromagnet of sewing machine

Technical Field

The utility model relates to an electro-magnet field especially indicates a sewing machine low noise electro-magnet.

Background

At present, some sewing machine's in the textile industry swing arm needs to promote its swing through the iron core of electro-magnet, this kind of electro-magnet, mainly include the casing, iron core and coil, the iron core stretches out from the shell front end, the tip that the shell was stretched out to the iron core is equipped with the dog, when the electro-magnet was circular telegram, the iron core stretches out from the shell tip, promote its swing with the swing arm striking, when the electro-magnet is outage, the swing arm drives the iron core and resets, swing arm and dog this moment, dog and the preceding terminal surface striking of shell, at the operating condition of electro-magnet circular telegram or outage, all can produce great noise, shape noise pollution, in the past, can harm workman's hearing, and produce the influence to the endocrine function of human body, and then influence human physiological.

Disclosure of Invention

The utility model aims at: in order to overcome the defects of the prior art, the utility model provides an electromagnet can reach effective, direct effect of falling the sound.

The technical scheme of the utility model: the utility model provides a sewing machine low noise electro-magnet, includes casing, iron core and coil, and the iron core stretches out from the casing front end, and the tip that the casing was stretched out to the iron core is equipped with the dog, and when the iron core was in the casing of withdrawal, the dog was contradicted with the preceding terminal surface of casing, and the cover is equipped with first sealing washer on the iron core, is equipped with the second sealing washer on the casing, and the iron core passes the setting of second sealing washer, first sealing washer, second sealing washer interval set up, and all contradict with shells inner wall and form the cushion chamber, first sealing washer inner wall is equipped with.

By adopting the technical scheme, after the electromagnet is electrified, the iron core extends out of the front end of the shell to drive the swing arm to swing, when the iron core instantaneously extends out of the shell, the iron core drives the first sealing ring to move to one side close to the second sealing ring, so that the distance between the first sealing ring and the second sealing ring is slowly shortened, air in the buffer cavity is continuously extruded to generate damping, the acting force of the outward movement of the iron core is offset, when the air pressure difference between the buffer cavity and the outside reaches a critical point, the air in the buffer cavity extrudes the first sealing ring, the air is released from the air holes, the purpose of slowing down the movement speed of the iron core is achieved, and the damping; after the electromagnet is powered off, the spring of the swing arm drives the iron core to reset, the iron core drives the first sealing ring to move to one side far away from the second sealing ring, the distance between the iron core and the second sealing ring is slowly lengthened, the acting force of the inward movement of the iron core is offset by the relative vacuum setting of the buffer cavity, when the pressure difference between the buffer cavity and the outside air reaches a critical point, the air is released from the air holes, the purpose of reducing the movement speed of the iron core is achieved, and the damping force almost disappears when the iron core reaches the shell. The novel hydraulic buffer has the advantages of simple structure, high utilization rate, good silencing effect by adopting the principle of air pressure difference, convenience, practicability, low cost and no need of regularly filling liquid like adopting a hydraulic buffer mode.

The utility model discloses a further setting again: first sealing washer including the sealing ring and locate the gasket of sealing ring bottom periphery, the sealing ring cover is established on the iron core, the gasket is contradicted with shells inner wall.

By adopting the further arrangement, the structure of the first sealing ring is more reasonable, the size of the sealing sheet is relatively smaller, the contact area with the inner wall of the shell is small, and the movement of the iron core is convenient; and the gasket is located sealing ring bottom periphery, and stable effectual, the resistance when the iron core resets is greater than the resistance that the iron core stretches out outside the casing, and noise cancelling effect when resetting the iron core is better, accords with the structural design of electro-magnet.

The utility model discloses a further setting again: the iron core including be the push rod portion that long and thin form set up and be the installation department of cylindric setting, push rod portion passes the setting of second sealing washer, the installation department periphery be equipped with the mounting groove, the sealing ring is installed in the mounting groove.

Adopt above-mentioned further setting again, structural design is reasonable, and the sealing ring is installed in the mounting groove. The first sealing ring is limited along the axial direction of the iron core and is not moved, so that the influence on the damping force is avoided, and the noise reduction effect is reduced.

The utility model discloses a still further set up: the shell further comprises an installation sleeve matched with the push rod portion, the front end of the push rod penetrates through the installation sleeve, an installation cavity is formed in the inner periphery of the installation sleeve, the second sealing ring is arranged in the installation cavity, a pressing piece is further arranged in the installation cavity, and the second sealing ring is pressed at the bottom of the installation cavity through the pressing piece.

Adopt above-mentioned still further setting, structural design is reasonable, the dismouting of the second sealing washer of being convenient for.

The utility model discloses a still further set up: still including the coil support, the coil is around establishing on the coil support, and the casing includes but the inner shell and the shell of split setting, and the coil support is installed in the inner shell, and the inner shell is installed in the shell, and the iron core is installed in the coil support, and the installation cover card is established on the shell, and contradicts with the inner wall of coil support, and the gasket of first sealing washer is contradicted with the inner wall of coil support.

In the above still further arrangement, the coil is wound on the coil support, and is mounted in the inner casing through the coil support, and is clamped in the outer casing through the inner casing. The mode of independent processing and reassembling avoids the problems that the electric wire used for connecting the coil is easily broken by pressing in the original integrated processing mode, the rejection rate is high, and each part cannot be independently replaced in the integrated processing mode, so that the cost is high and the efficiency is low, and successfully achieves the aims of reducing the cost and conveniently processing the parts.

The utility model discloses a still further set up: the coil support rear end is equipped with the locating plate, and the inner shell rear end is equipped with the first opening that supplies the coil support to install, first opening part be equipped with the first baffle of locating plate adaptation, when the coil support was packed into in the inner shell, locating plate and first baffle contradict.

Adopt above-mentioned still further setting, simple structure, reasonable in design for coil bracket is when the assembly, and the locating plate is located outside the inner shell, the change of taking of coil bracket of being convenient for.

The utility model discloses a still further set up: the coil support is characterized in that a second opening is formed in the front end of the inner shell and communicated with the first opening, a second baffle used for preventing the coil support from sliding out of the inner shell forwards is arranged at the second opening, and when the coil support is installed in the inner shell, the front end of the coil support is abutted against the second baffle.

With the above further arrangement, the coil support can be prevented from being displaced excessively and sliding out of the inner case forward when being assembled.

The utility model discloses a still further set up: the shell is conducted from top to bottom, the coil support is conducted from front to back, and a through hole for installing the iron core is formed in the rear end face of the shell.

By adopting the above further arrangement, the iron core can be loaded from the through hole on the rear end face of the shell, and the assembly is convenient.

The utility model discloses a still further set up: the stop block is in threaded connection with the push rod part of the iron core.

Adopt above-mentioned still further setting again, when the iron core was installed, unscrewed the dog, with the iron core split, pack the iron core into from the through-hole on the shell rear end face again, the dog and the iron core of screwing realize the installation, simple structure, reasonable in design, the iron core dismouting of being convenient for.

The utility model discloses a still further set up: the inner shell correspond opening one side be equipped with the scarce groove that the power supply line was installed.

Adopt above-mentioned still further setting, structural design is reasonable, can avoid the extrusion to the electric wire.

Drawings

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

FIG. 2 is an internal structural view of an embodiment of the present invention;

FIG. 3 is an exploded view of an embodiment of the present invention;

FIG. 4 is a diagram illustrating the structure of the inner shell according to an embodiment of the present invention;

fig. 5 is an assembly view of the iron core and the mounting sleeve in the embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

fig. 7 is a structural diagram of a first seal ring according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indications (such as up, down, front, and back … …) in the description of the present invention are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

As shown in fig. 1-7, the utility model discloses a: the utility model provides a sewing machine low noise electro-magnet, includes casing 1, iron core 2 and coil 3, and iron core 2 stretches out from 1 front end of casing, and the tip that iron core 2 stretches out casing 1 is equipped with dog 4, and when iron core 2 withdraws in casing 1, dog 4 contradicts with casing 1's preceding terminal surface, and the cover is equipped with first sealing washer 5 on iron core 2, is equipped with second sealing washer 6 on casing 1, and iron core 2 passes second sealing washer 6 and sets up, first sealing washer 5, 6 intervals of second sealing washer set up, and all contradict with casing 1 inner wall and form cushion chamber 8, the conflict be contradict relatively, 5 inner walls of first sealing washer are equipped with a bleeder vent 13 at least. After the electromagnet is electrified, the iron core 2 extends out of the front end of the shell 1 to drive the swing arm to swing, when the iron core 2 instantaneously extends out of the shell 1, the iron core 2 drives the first sealing ring 5 to move towards one side close to the second sealing ring 6, so that the distance between the first sealing ring and the second sealing ring is slowly shortened, the air in the buffer cavity 8 is continuously extruded to generate damping, the acting force of the outward movement of the iron core 2 is counteracted, when the air pressure difference between the buffer cavity 8 and the outside reaches a critical point, the air in the buffer cavity extrudes the first sealing ring 5, the air is released from the air holes 13, the purpose of slowing down the movement speed of the iron core 2 is achieved, and the damping force almost disappears; after the electro-magnet outage, the spring of swing arm drives iron core 2 and resets, drive first sealing washer 5 by iron core 2 and to keeping away from the motion of second sealing washer 6 one side for the distance between the two is elongated slowly, and the relative vacuum setting of cushion chamber 8 offsets the effort of iron core 2 inward movement, and when cushion chamber 8 and external air pressure difference reached the critical point, the air released from bleeder vent 13, thereby reaches the purpose that slows down iron core 2 velocity of motion, and damping force almost disappears when iron core 2 reached in the casing 1. The novel hydraulic buffer has the advantages of simple structure, high utilization rate, good silencing effect by adopting the principle of air pressure difference, convenience, practicability, low cost and no need of regularly filling liquid like adopting a hydraulic buffer mode.

The specific embodiment of the utility model, first sealing washer 5 including sealing ring 51 and locate sealing ring 51 bottom periphery's gasket 52, the sealing ring 51 cover is established on iron core 2, gasket 52 contradicts with 1 inner wall of casing. The first sealing ring 5 is more reasonable in structural arrangement, the sealing piece 52 is relatively small in size, the contact area with the inner wall of the shell 1 is small, and the movement of the iron core 2 is facilitated; and sealed 52 pieces locate sealing ring 51 bottom periphery, and stable effectual, the resistance when iron core 2 resets is greater than the resistance that iron core 2 stretches out outside the casing, and noise cancelling effect when resetting iron core 2 is better, accords with the structural design of electro-magnet.

The utility model discloses a specific embodiment, iron core 2 including being the push rod part 21 of long and thin form setting and being the installation department 22 of cylindric setting, push rod part 21 passes second sealing washer 6 and sets up, installation department 22 periphery be equipped with mounting groove 221, sealing ring 51 is installed in mounting groove 221. The structural design is reasonable, and the sealing ring 51 is arranged in the mounting groove 221. The realization is to first sealing washer 5 along 2 ascending spacing of iron core axial, unmovable, avoids the influence to the damping force to reduce noise cancelling effect.

The utility model discloses a concrete embodiment, casing 1 is still including the installation cover 9 with the 21 adaptations of push rod portion, 21 front ends of push rod wear to establish installation cover 9 and set up, be formed with installation cavity 91 in the installation cover 9 week, second sealing washer 6 is located in installation cavity 91, installation cavity 91 in still be equipped with press 10, second sealing washer 6 press through press 10 and establish in installation cavity 91 bottom. Structural design is reasonable, the dismouting of the second sealing washer 6 of being convenient for.

The specific embodiment of the utility model also includes a coil support 7, a coil 3 is wound on the coil support 7, the shell 1 includes an inner shell 11 and an outer shell 12 which can be split, the coil support 7 is installed in the inner shell 11, the inner shell 11 is installed in the outer shell 12, an iron core 2 is installed in the coil support 7, an installation sleeve 9 is clamped on the outer shell 12 and is abutted against the inner wall of the coil support 7, and a sealing sheet 52 of a first sealing ring 5 is abutted against the inner wall of the coil support 7; the rear end of the coil support 7 is provided with a positioning plate 71, one side of the inner shell 11 is provided with a first opening 112 for installing the coil support 7, the first opening 112 is provided with a baffle plate 113 matched with the positioning plate 71, and when the coil support 7 is installed in the inner shell 11, the positioning plate 71 is abutted against the baffle plate 113; a second opening 114 is formed in the front end of the inner shell 11, the second opening 114 is communicated with the first opening 112, a second baffle 115 for preventing the coil support 7 from sliding out of the outer shell 11 forward is arranged at the second opening 114, and when the coil support 7 is installed in the inner shell 11, the front end of the coil support 7 is abutted against the second baffle 115; the outer shell 12 is vertically conducted, the coil support 7 and the inner shell 11 are conducted from front to back, and a through hole 121 for installing the iron core 2 is formed in the rear end face of the outer shell 12. During the equipment, at first will be around being equipped with coil 3 coil support 7 and pack into from the first opening 112 department of inner shell 11, locating plate 71 contradict with baffle 113, the inner shell 11 card after the combination is established in shell 12 again, installation cover 9 packs into the card from the through-hole 121 of shell and locates the front end of shell, packs into iron core 2 from through-hole 121 at last, and the iron core 2 front end passes from the installation cavity of installation cover 9, stretches out outside casing 1. The mode of independent processing and reassembling has simple structure and convenient processing, and avoids the problems that the electric wire for connecting the coil 3 is easily broken by pressing in the original integrated processing mode, the rejection rate is high, and each part cannot be independently replaced in the integrated processing mode, so that the cost is high and the efficiency is low, thereby successfully realizing the purposes of reducing the cost and facilitating the processing of the parts.

The utility model discloses a concrete embodiment, dog 4 and iron core 2's push rod portion 51 threaded connection. When iron core 2 was installed, can unscrew dog 4, with the iron core 2 split, pack into iron core 2 from through-hole 121 on the shell 12 rear end face again, dog 4 and iron core 2's push rod portion 51 threaded connection realize the installation.

In the embodiment of the present invention, the inner casing 11 is provided with a slot 116 corresponding to the opening 112 for installing the power supply line. Structural design is reasonable, can avoid the extrusion to the electric wire.

Claims (10)

1. The utility model provides a sewing machine low noise electro-magnet, includes casing, iron core and coil, and the iron core stretches out from the casing front end, and the tip that the casing was stretched out to the iron core is equipped with the dog, and when the iron core was withdrawn in the casing, the dog was contradicted with the preceding terminal surface of casing, and its characterized in that, the cover is equipped with first sealing washer on the iron core, is equipped with the second sealing washer on the casing, and the iron core passes the setting of second sealing washer, first sealing washer, second sealing washer interval set up, and all contradict with shells inner wall and form the cushion chamber, first sealing washer inner wall is equipped with.

2. The sewing machine low-noise electromagnet according to claim 1, wherein the first sealing ring comprises a sealing ring and a sealing sheet arranged on the periphery of the bottom of the sealing ring, the sealing ring is sleeved on the iron core, and the sealing sheet is abutted against the inner wall of the housing.

3. The sewing machine low-noise electromagnet according to claim 2, wherein the iron core includes a rod portion disposed in a slender shape and a mounting portion disposed in a cylindrical shape, the rod portion passes through the second seal ring, the mounting portion is provided with a mounting groove at its periphery, and the seal ring is mounted in the mounting groove.

4. The low-noise electromagnet for the sewing machine as claimed in claim 3, wherein the housing further comprises a mounting sleeve adapted to the push rod portion, the front end of the push rod is disposed through the mounting sleeve, a mounting cavity is formed in an inner periphery of the mounting sleeve, the second sealing ring is disposed in the mounting cavity, a pressing member is further disposed in the mounting cavity, and the second sealing ring is pressed at the bottom of the mounting cavity through the pressing member.

5. The low-noise electromagnet of the sewing machine according to claim 4, further comprising a coil support, wherein the coil is wound on the coil support, the housing comprises an inner shell and an outer shell which are detachably arranged, the coil support is arranged in the inner shell, the inner shell is arranged in the outer shell, the iron core is arranged in the coil support, the mounting sleeve is clamped on the outer shell and abuts against the inner wall of the coil support, and the sealing piece of the first sealing ring abuts against the inner wall of the coil support.

6. A sewing machine low noise electromagnet as defined in claim 5, wherein the coil support has a positioning plate at a rear end thereof, the inner case has a first opening at a rear end thereof for the coil support to be mounted therein, the first opening has a first blocking plate fitted to the positioning plate, and the positioning plate abuts against the first blocking plate when the coil support is mounted in the inner case.

7. The sewing machine low-noise electromagnet according to claim 6, wherein the inner housing has a second opening at a front end thereof, the second opening being in communication with the first opening, the second opening being provided with a second baffle for blocking the coil support from sliding forward out of the inner housing, the coil support having a front end abutting against the second baffle when the coil support is installed in the inner housing.

8. The sewing machine low-noise electromagnet according to claim 7, wherein the housing is vertically conductive, the coil support is vertically conductive, and a through hole for mounting the iron core is formed in a rear end surface of the housing.

9. The sewing machine low noise electromagnet of claim 8, wherein the stopper is threadedly coupled to the plunger portion of the core.

10. The sewing machine electromagnet of claim 9, wherein the inner housing has a slot corresponding to the opening for receiving the power supply wire.

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