阅读说明：本技术 一种长耐久性的动簧及电磁继电器 (Long-durability movable spring and electromagnetic relay ) 是由 李东侠 谭忠华 于 2020-05-20 设计创作，主要内容包括：本发明公开了一种长耐久性的动簧及电磁继电器,所述动簧用于拍合式电磁继电器,包括与电磁继电器的衔铁配合的第一片体、与电磁继电器的轭铁配合的第二片体,以及设置在第一片体与第二片体之间的折弯部；所述折弯部镂空并拱起,所述第二片体在轭铁上的动作着力点与固定点不重合,并在轭铁的宽度方向上错开。所述折弯部镂空并拱起,能够增加动簧的柔性和增加动簧的长度,从而减小动簧的动作幅度；所述第二片体在轭铁上的动作着力点与固定点不重合,并在轭铁的宽度方向上错开,能够确保动簧片动作时不会将应力集中在第二片体在轭铁上的固定点,从而确保动簧在轭铁上的固定点所在的部位不易疲劳断裂。因而,本发明的动簧能够实现长耐久性。(The invention discloses a long-durability movable spring and an electromagnetic relay, wherein the movable spring is used for a clapper type electromagnetic relay and 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. 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. Thus, the dynamic spring of the present invention can achieve long durability.)

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 as claimed in 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. The long lasting power spring of claim 9, wherein: 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.

Technical Field

The invention relates to the field of relays, in particular to a long-durability movable spring and an electromagnetic relay.

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.

Disclosure of Invention

The invention provides a long-durability movable spring and an electromagnetic relay, which overcome the problem of poor durability of the movable spring of the relay in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: 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 invention also provides an electromagnetic relay, which comprises a base, a magnetic circuit part and a contact part, wherein the magnetic circuit part comprises a yoke iron, an armature iron, a coil frame arranged on the base, an iron core and an enameled wire arranged on the coil frame; the movable spring has long durability as described in the present invention.

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 invention has the following beneficial effects:

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. Thus, the dynamic spring of the present invention can achieve 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 invention is further explained in detail with the accompanying drawings and the embodiments; however, the long-durability movable spring and electromagnetic relay according to the present invention is not limited to the embodiments.

Drawings

FIG. 1 is a schematic structural view of a movable spring according to the present invention;

FIG. 2 is a first schematic structural view of the movable spring and the magnetic circuit part of the present invention in a matching state;

FIG. 3 is a schematic structural diagram II of the movable spring and the magnetic circuit part of the present invention in a matching state;

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

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

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

FIG. 7 is a schematic view of the yoke and the movable spring terminal of the present invention in an assembled state;

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

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

Detailed Description