CN212461543U - Long-durability movable spring and electromagnetic relay - Google Patents

Abstract

The utility model discloses a long-durability movable spring and electromagnetic relay, the movable spring is used for clapping type electromagnetic relay, comprising a first sheet body matched with an armature of the electromagnetic relay, a second sheet body matched with a yoke of the electromagnetic relay, and a bending part arranged between the first sheet body and the second sheet body; the bent part is hollowed and arched, and the acting force point and the fixed point of the second sheet body on the yoke are not overlapped and staggered in the width direction of the yoke. The bending part is hollow and arched, so that the flexibility and the length of the movable spring can be increased, and the action amplitude of the movable spring is reduced; the action force point of the second sheet body on the yoke is not overlapped with the fixed point, and is staggered in the width direction of the yoke, so that the fixed point of the second sheet body on the yoke can not be concentrated on stress when the movable spring piece acts, and the part of the movable spring on the fixed point of the yoke is not easy to fatigue fracture. Therefore, the utility model discloses a moving spring can realize long durability.

Description

Long-durability movable spring and electromagnetic relay

Technical Field

The utility model relates to a relay field especially relates to a movable spring and electromagnetic relay of long durability.

Background

As a basic control element, an electromagnetic relay has been widely used in automation control, and its market application field is expanding, and its high operation frequency is receiving more and more attention due to the demand of automation efficiency, for example, in PLC, its required durability is as long as several thousands of times, and as high as 10 times higher than that of a general relay, so that the relay with long durability becomes one of hot products in the relay field in time. One of the key factors of the long durability of the relay is that the flexibility of the movable spring is required to be good, and the stress concentration is small when the movable spring acts, so that the movable spring is not easy to fatigue fracture. However, the durability of the moving springs of prior art relays is generally not desired.

SUMMERY OF THE UTILITY MODEL

The utility model provides a movable spring and electromagnetic relay of long durability, it has overcome the poor problem of prior art's relay movable spring durability.

The utility model provides a technical scheme that its technical problem adopted is: a long-durability movable spring for a clapper type electromagnetic relay comprises a first sheet body matched with an armature of the electromagnetic relay, a second sheet body matched with a yoke of the electromagnetic relay, and a bending part arranged between the first sheet body and the second sheet body; the bent part is hollowed and arched, and the acting force point and the fixed point of the second sheet body on the yoke are not overlapped and staggered in the width direction of the yoke.

Furthermore, the bending part comprises a plurality of strip sheets which are distributed in parallel at intervals, one end of each strip sheet is integrally connected with the first sheet body, the other end of each strip sheet is integrally connected with the second sheet body, and each strip sheet is arched.

Further, each strip sheet is respectively in an arc shape.

Further, the length of the part of the strip sheet, which is positioned on the same side of the armature as the first sheet body, is smaller than the length of the rest part of the strip sheet.

Furthermore, the second sheet body comprises a force application part and a fixing part, the other end of each strip sheet and the fixing part are respectively connected with the force application part integrally, and the strip sheets and the fixing part are positioned on the same side of the force application part; the action acting point of the second sheet body on the yoke is positioned at the acting part, and the fixed point of the second sheet body on the yoke is positioned at the fixed part.

Furthermore, the fixing part is positioned in the middle of one side of the force application part, and the fixing part and the force application part form a Chinese character 'shan'; the number of the long strips is two, and the two long strips are positioned on two opposite sides of the fixing part and are respectively connected with the left side and the right side of the force application part.

Furthermore, the fixing part is provided with a first riveting hole for riveting with the yoke.

Furthermore, the first sheet body is provided with a second riveting hole for riveting with the armature and a movable contact, and the second riveting hole and the movable contact are respectively positioned at two opposite ends of the first sheet body.

The utility model also provides an electromagnetic relay, including base, magnetic circuit part, contact segment, the magnetic circuit part includes yoke, armature, installs in the coil former of base to and set up iron core, enameled wire on the coil former, the contact segment includes movable spring and the quiet spring that cooperates with this movable spring, coil former, yoke, movable spring, armature assemble together according to clapping type structure; the movable spring adopts the movable spring with long durability as described in the utility model.

Furthermore, the magnetic circuit part also comprises a tension spring, the tension spring and the second sheet body of the movable spring are positioned on the same side of the yoke, and two ends of the tension spring are respectively connected with the armature and the yoke; the static spring is arranged on the base or the coil rack.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the bending part is hollow and arched, so that the flexibility and the length of the movable spring can be increased, and the action amplitude of the movable spring is reduced; the action force point of the second sheet body on the yoke is not overlapped with the fixed point, and is staggered in the width direction of the yoke, so that the fixed point of the second sheet body on the yoke can not be concentrated on stress when the movable spring piece acts, and the part of the movable spring on the fixed point of the yoke is not easy to fatigue fracture. Therefore, the utility model discloses a moving spring can realize long durability.

2. The bending part comprises a plurality of long strips which are distributed in parallel at intervals, so that the bending part of the movable spring can be as narrow as possible under the condition of ensuring the current-carrying capacity, and the flexibility of the movable spring is further increased. Particularly, the long strip is in an arc shape, so that the movable spring can be longest under the condition of space allowance, the action amplitude of the movable spring is further reduced, and the long durability of the movable spring is further improved.

3. The second sheet body comprises a force application part and fixing parts, and each strip sheet and the fixing parts are positioned on the same side of the force application part, so that the fixing parts do not additionally occupy the length space of the movable spring, the length of the strip sheets can be lengthened as much as possible, and the action amplitude of the movable spring is reduced to the greatest extent.

4. The fixed part and the force application part form a Chinese character 'shan', a gap is formed between the fixed part and the left side and the right side of the force application part, and the force application part can tilt when the movable spring acts, so that the pulling buffer effect is achieved, and the position where the fixed point of the movable spring is located is further ensured not to be prone to fatigue fracture.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment, and the long-durability movable spring and electromagnetic relay are not limited to the embodiment.

Drawings

Fig. 1 is a schematic structural view of the movable spring of the present invention;

fig. 2 is a first schematic structural view of the movable spring and the magnetic circuit part in the engaged state;

fig. 3 is a schematic structural diagram ii of the movable spring and the magnetic circuit portion in the engaged state according to the present invention;

fig. 4 is a cross-sectional view (including a housing) of the electromagnetic relay of the present invention;

fig. 5 is a schematic perspective view of a magnetic circuit portion according to the present invention (without an armature);

FIG. 6 is a schematic perspective view of the magnetic circuit part of the present invention (without magnet)

Fig. 7 is a schematic structural view of the yoke and the movable spring leading-out terminal of the present invention in a combined state;

fig. 8 is a schematic perspective view of the base of the present invention (including the static spring);

fig. 9 is a second sectional view (without a housing) of the electromagnetic relay according to the present invention.

Detailed Description

In an embodiment, please refer to fig. 1-3, a long-durability movable spring of the present invention, which is used for a clapper type electromagnetic relay, is substantially L-shaped, and includes a first sheet 61 engaged with an armature 2 of the electromagnetic relay, a second sheet 62 engaged with a yoke 3 of the electromagnetic relay, and a bent portion disposed between the first sheet 61 and the second sheet 62; the bent portion is hollowed out and arched, and the acting force point of the second sheet body 62 on the yoke 3 does not coincide with the fixed point, and is staggered in the width direction of the yoke 3. The bending part is arched, so that the armature movement can be prevented from being influenced by interference with the armature 3, the length of the movable spring can be increased, the flexibility of the movable spring is increased, and in addition, the swing amplitude of the stress point movement of the movable spring can be reduced when the armature moves.

In this embodiment, the bending portion includes a plurality of long pieces 63 arranged in parallel and at intervals, one end of each long piece 63 is integrally connected to the first sheet 61, the other end of each long piece 63 is integrally connected to the second sheet 62, and each long piece 63 is arched. Specifically, each of the long strips 63 is arcuate. The number of the long pieces 63 is two, but not limited thereto. The length of the portion 631 of the strip 63 on the same side of the armature 2 as the first plate 61 is smaller than the length of the remaining portion 632 of the strip, and the remaining portion 632 of the strip 63 occupies most of the space on the yoke 3 side, so that each strip 63 has the maximum bow when the space allows.

In this embodiment, the second sheet 62 includes a force applying portion 621 and a fixing portion 622, the other end of each strip 63 and the fixing portion 622 are respectively connected to the force applying portion 621 integrally, and the strip 63 and the fixing portion 622 are located on the same side of the force applying portion 621, so that the fixing portion 622 does not occupy the length space of the movable spring additionally, and the length of the strip 63 can be as long as possible. The action force point of the second plate 62 on the yoke 3 is located at the force part 621, and the fixed point of the second plate 62 on the yoke 3 is located at the fixed part 622.

In this embodiment, the fixing portion 622 is located at the middle position of one side of the force applying portion 621, and the fixing portion 622 and the force applying portion 621 form a chevron shape. The two strips 63 are located on opposite sides of the fixing portion 622 and are connected to the left and right sides of the fixing portion 622, respectively.

In this embodiment, the force applying portion 621 is provided with a plurality of first riveting holes (not shown) for riveting with the yoke 3, and the number of the first riveting holes is several (specifically, two, but not limited thereto), and the plurality of first riveting holes are distributed along the length direction of the fixing portion 622. The first sheet body 61 is provided with a second riveting hole 611 for riveting with the armature 2, and a movable contact 64, and the second riveting hole and the movable contact 64 are respectively located at two opposite ends of the first sheet body 61.

The utility model discloses a movable spring of long durability, its portion of bending fretwork and hunch-up can increase the flexibility of movable spring and increase the length of movable spring to reduce the action range of movable spring. Particularly, the bending part comprises the long strip 63, so that the bending part of the movable spring can be as narrow and long as possible under the condition of ensuring the current-carrying capacity, thereby further increasing the flexibility of the movable spring and reducing the action amplitude of the movable spring. The acting force point of the second sheet body 62 on the yoke 3 is not overlapped with the fixed point, and is staggered in the width direction of the yoke 3, so that the fixed point of the second sheet body 62 on the yoke 3 can be ensured not to concentrate stress when the movable spring piece acts, and the part of the movable spring on the fixed point of the yoke 3 is ensured not to be easy to fatigue fracture. In addition, the fixing portion 622 and the force application portion 621 form a chevron shape, so that a gap is formed between the fixing portion 622 and the left side and the right side of the force application portion 621, and thus, when the movable spring acts, the force application portion 621 tilts, so that a pulling and buffering effect is achieved, and the position where the fixing point of the movable spring is located is further ensured not to be prone to fatigue fracture. Referring to fig. 1-9, an electromagnetic relay according to the present invention includes a base 1, a magnetic circuit portion and a contact portion, wherein the magnetic circuit portion includes a yoke 3, an armature 2, a coil frame 4 mounted on the base 1, an iron core 10 disposed on the coil frame 4, and an enameled wire 5, the contact portion includes a movable spring 6 and a stationary spring 7 cooperating with the movable spring 6, the stationary spring 7 is mounted on the base 1, but not limited thereto, and in other embodiments, the stationary spring is mounted on the coil frame. The movable spring 6 adopts the movable spring with long durability as described in the utility model. The coil frame 4, the yoke 3, the iron core 10, the movable spring 6 and the armature 2 are assembled together according to a clapper type structure; specifically, the iron core 10 is installed in the coil rack 4, one end of the iron core 10 is connected with the yoke 3, the armature 2 is located at the other end of the iron core 10, one end of the armature 2 is matched with the knife edge of the yoke 3, the first sheet 61 of the movable spring 6 is connected with the armature 2, and the second sheet 62 is connected with the yoke 3.

In the embodiment, the magnetic circuit part is horizontal, two coil leading-out terminals 51 electrically connected with the enameled wire 5 are arranged at one axial end of the coil rack 4, and the two coil leading-out terminals 51 respectively penetrate through the base 1; the other axial end of the coil frame 4 is provided with a first fixing portion 41 facing the base 1, and the first fixing portion 41 is fixedly connected to the base 1.

In this embodiment, the first fixing portion 41 is inserted into the first insertion hole 11 of the base 1, and the two are adhered and fixed by glue. The first fixing portion 41 is integrally formed with the bobbin 4.

In this embodiment, a second fixing portion 42 facing the base 1 is disposed at one axial end of the coil frame 4, the second fixing portion 42 is integrally formed with the coil frame 4, and the second fixing portion 42 is fixedly connected to the base 1. Specifically, the second fixing portion 42 is inserted into the second insertion hole 12 of the base 1, and the two are fixed by gluing. In other embodiments, the coil leading-out terminals are respectively inserted into the base to fix one axial end of the coil rack.

In this embodiment, the number of the second fixing portions 42 is two, and the two coil lead-out terminals 51 correspond to each other one by one, and each coil lead-out terminal 51 is provided in the corresponding second fixing portion 42. Specifically, second fixed part 42 is bottom open-ended hollow structure, each coil leading-out terminal 51 top is fixed in respectively corresponding second fixed part 42 in, and outside each coil leading-out terminal 51 partially stretches out second fixed part 42 through the opening of stepping down that second fixed part 42 side set up respectively for connect with coil leading-out terminal 51 electricity, and with base 1 interference fit. Specifically, the part of each coil leading-out terminal 51 extending out of the abdicating opening of the second fixing portion 42 is provided with a plurality of protrusions 511 and a connecting rod 512 respectively, the protrusions 511 are used for interference fit with the second insertion holes 12 of the base 1, the connecting rod 512 is used for electrically connecting with the enameled wire 5, and specifically, the end portion of the enameled wire 5 is wound on the connecting rod 512.

In this embodiment, the yoke 3 is L-shaped, and has one side fitted to the upper side of the bobbin 4 and riveted to the fixing portion 622 of the movable spring 6 and the other side riveted to one end of the core 10 and connected to the movable spring lead-out terminal 8. The movable spring leading-out terminal 8 is approximately ㄣ -shaped, the top part of the movable spring leading-out terminal is electrically connected with the other side of the yoke 3, the middle part of the movable spring leading-out terminal is positioned below the enameled wire 5 and extends towards the other axial end of the coil rack 4, and the bottom part of the movable spring leading-out terminal downwards passes through a third insertion hole 13 arranged on the base 1 and is in interference fit with the third insertion hole 13. Specifically, the side surface of the bottom of the movable spring leading-out terminal 8 is provided with a plurality of protrusions 81 for interference fit with the third insertion hole 13 of the base 1. Due to the structural design of the movable spring leading-out terminal 8, on one hand, the movable spring leading-out terminal 8 can be kept away from the coil leading-out terminal 51, on the other hand, the matching between the movable spring leading-out terminal 8 and the base 1 can be utilized, the firmness of connection between the magnetic circuit system and the base 1 is increased, and therefore the mechanical stability of the magnetic circuit part when the magnetic circuit part is subjected to impact vibration is further improved.

In this embodiment, the magnetic circuit portion further includes a tension spring 9, the tension spring 9 and the second sheet 62 of the movable spring 6 are located on the same side of the yoke 3, and two ends of the tension spring 9 are respectively connected to the armature 2 and the yoke 3. Specifically, the tension spring 9 is located between two long strips 63 of the movable spring 6, and two ends of the tension spring 9 are respectively hung on the hook structure arranged on the armature 2 and the hook structure arranged on one side of the yoke 3. The tension spring 9 is used to increase the reaction force of the movable spring 6.

In this embodiment, the electromagnetic relay of the present invention further includes a housing 20, the bottom end of the housing 20 is open and connected to the base 1, and the magnetic circuit portion and the movable spring 6 are accommodated in the cavity of the housing.

In this embodiment, the number of the static springs 7 is two, the two static springs 7 respectively form a normally open static spring and a normally closed static spring, and the end of the movable spring 6 where the movable contact 64 is located between the two static springs 7.

The utility model discloses an electromagnetic relay, during the assembly, will assemble 7 cartridges of quiet spring on base 1 earlier, then, will assemble yoke 3, iron core 10, enameled wire 5, coil leading-out terminal 51's coil former 4 dress on base 1, specifically, make the first fixed part 41 of coil former 4 pass base 1's first jack 11 to it is fixed to bond with glue, make coil former 4 second fixed part 42 pass base 1's second jack 12, and bond fixedly with glue. Then, the movable spring 6 riveted with the armature 2 is riveted with the yoke 3, and finally, the tension spring 9 is hung to complete assembly.

The utility model discloses an electromagnetic relay, its movable spring 6 adopts the aforesaid the movable spring of long durability after, make whole relay possess long durability, can be applied to in the automated control field. Its coil former 4 is through first fixed part 41 and base 1 fixed connection, makes the utility model discloses a coil former 4 is when receiving impact vibration, and the 4 axial other ends of coil former can not float to improve the mechanical stability of magnetic circuit part, improve the reliable and stable nature of product parameter. The coil rack 4 is further fixedly connected with the base 1 through the second fixing part 42, so that bilateral effective fixation is realized, the position of a magnetic circuit part of the coil rack can not be changed when a product is subjected to great vibration and impact, and the stability and reliability of product parameters are ensured.

The above embodiments are only used to further illustrate the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made by the technical entity of the present invention to the above embodiments all fall into the protection scope of the present invention.

Claims (10)

1. A long-durability movable spring for a clapper type electromagnetic relay comprises a first sheet body matched with an armature of the electromagnetic relay, a second sheet body matched with a yoke of the electromagnetic relay, and a bending part arranged between the first sheet body and the second sheet body; the method is characterized in that: the bent part is hollowed and arched, and the acting force point and the fixed point of the second sheet body on the yoke are not overlapped and staggered in the width direction of the yoke.

2. The long-lasting power spring of claim 1, wherein: the bending part comprises a plurality of strip sheets which are distributed in parallel at intervals, one end of each strip sheet is integrally connected with the first sheet body, the other end of each strip sheet is integrally connected with the second sheet body, and each strip sheet is arched.

3. The long-lasting power spring of claim 2, wherein: the long strips are respectively in an arc shape.

4. The long-lasting power spring of claim 2, wherein: the length of the part of the strip sheet, which is positioned on the same side of the armature with the first sheet body, is smaller than that of the rest part of the strip sheet.

5. The long lasting power spring according to any one of claims 2-4, wherein: the second sheet body comprises a force application part and a fixing part, the other end of each strip sheet and the fixing part are respectively connected with the force application part integrally, and the strip sheets and the fixing part are positioned on the same side of the force application part; the action acting point of the second sheet body on the yoke is positioned at the acting part, and the fixed point of the second sheet body on the yoke is positioned at the fixed part.

6. The long lasting power spring of claim 5, wherein: the fixing part is positioned in the middle of one side of the force application part, and the fixing part and the force application part form a Chinese character 'shan'; the number of the long strips is two, and the two long strips are positioned on two opposite sides of the fixing part and are respectively connected with the left side and the right side of the force application part.

7. The long lasting power spring of claim 5, wherein: the fixing part is provided with a first riveting hole used for riveting with the yoke.

8. The long-lasting power spring of claim 1, wherein: the first sheet body is provided with a second riveting hole used for riveting with the armature and a movable contact, and the second riveting hole and the movable contact are respectively positioned at two opposite ends of the first sheet body.

9. An electromagnetic relay comprises a base, a magnetic circuit part and a contact part, wherein the magnetic circuit part comprises a yoke, an armature, an iron core, a coil frame arranged on the base and an enameled wire arranged on the coil frame; the method is characterized in that: the dynamic spring is the dynamic spring with long durability as claimed in any one of claims 1 to 8.

10. An electromagnetic relay according to claim 9, characterized in that: the magnetic circuit part also comprises a tension spring, the tension spring and the second sheet body of the movable spring are positioned on the same side of the yoke, and two ends of the tension spring are respectively connected with the armature and the yoke; the static spring is arranged on the base or the coil rack.

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