阅读说明：本技术 继电器 (Relay with a movable contact ) 是由 雷小勇 曾志 汪鲁建 刘斯源 于 2018-08-01 设计创作，主要内容包括：本公开涉及一种继电器,包括静触点组件、动触板组件(1)、弹性件、推杆(3)以及动铁芯(4),所述动触板组件(1)包括动触板(11)、绝缘件(12)和耐磨件(13),所述动触板上设置有通孔,所述绝缘件和所述耐磨件固定安装在所述通孔内,所述绝缘件位于所述耐磨件和所述动触板之间以将所述耐磨件和所述动触板隔开,所述推杆的下端与所述动铁芯相连,所述推杆的上端滑动穿设于所述耐磨件,所述弹性件用于向所述动触板组件施加朝向所述静触点组件方向的弹性力。通过上述技术方案,耐磨件可以有效地防止推杆与绝缘件摩擦产生粉尘颗粒,达到提高继电器使用寿命的目的。(The utility model relates to a relay, including stationary contact subassembly, movable contact subassembly (1), elastic component, push rod (3) and move iron core (4), movable contact subassembly (1) is including moving touch panel (11), insulating part (12) and wearing parts (13), be provided with the through-hole on the movable contact panel, the insulating part with wearing parts fixed mounting in the through-hole, the insulating part is located between the wearing parts with move the touch panel in order to separate wearing parts with the movable contact subassembly, the lower extreme of push rod with move the iron core and link to each other, the upper end of push rod slides and wears to locate the wearing parts, the elastic component be used for to the movable contact subassembly exert towards the elastic force of stationary contact subassembly direction. Through above-mentioned technical scheme, wearing parts can prevent effectively that push rod and insulating part friction from producing dust particle, reaches the purpose that improves relay life.)

1. A relay is characterized by comprising a fixed contact assembly, a movable contact assembly (1), an elastic element, a push rod (3) and a movable iron core (4), the movable contact plate component (1) comprises a movable contact plate (11), an insulating piece (12) and a wear-resistant piece (13), the movable contact plate (11) is provided with a through hole, the insulating part (12) and the wear-resistant part (13) are fixedly arranged in the through hole, the insulating part (12) is positioned between the wear-resistant part (13) and the movable contact plate (11) to separate the wear-resistant part (13) and the movable contact plate (11), the lower end of the push rod (3) is connected with the movable iron core (4), the upper end of the push rod (3) is slidably arranged through the wear-resistant part (13), the elastic piece is used for applying elastic force towards the direction of the fixed contact assembly to the movable contact assembly (1).

2. The relay according to claim 1, wherein the wear-resistant member (13) comprises a cylindrical wear-resistant member body (131) formed in one piece, an upper flange (133) formed at an upper end of the wear-resistant member body (131), and a lower flange (132) formed at a lower end of the wear-resistant member body (131), a limit boss (31) is formed at an upper end of the push rod (3), the upper flange (133) is clamped between the limit boss (31) and the insulating member (12), the lower flange (132) is located between the elastic member and the insulating member (12), and an upper end of the elastic member abuts against the lower flange (132).

3. The relay according to claim 2, characterized in that the movable contact plate (11), the insulating member (12) and the wear member (13) are connected by means of in-mold injection molding.

4. The relay according to claim 1, wherein the wear part (13) comprises an integrally formed cylindrical wear part body (131) and an upper flange (133) formed at an upper end of the wear part body (131), the relay further comprises a gasket (9), the gasket (9) is connected with a lower end of the wear part body (131), a limit boss (31) is formed at an upper end of the push rod (3), the upper flange (133) is clamped between the limit boss (31) and the insulating part (12), the gasket (9) is located between the elastic part and the insulating part (12), and the upper end of the elastic part abuts against the gasket (9).

5. The relay according to claim 4, characterized in that the movable contact plate (11), the insulating member (12), the wear member (13) and the washer (9) are connected by means of in-mold injection molding.

6. The relay according to claim 4, characterized in that the washer (9) is sleeved on the lower end of the wear part body (131), the lower end of the wear part body (131) is formed with an annular boss (134) extending along the circumferential direction of the wear part body (131), the upper side of the annular boss (134) forms a spigot fit with the insulating part (12), and the lower side of the annular boss (134) forms a spigot fit with the washer (9).

7. The relay according to claim 2, wherein the insulating member (12) is formed with a first annular groove (126), an outer edge of the upper flange (133) is fitted into the first annular groove (126), the insulating member (12) is further formed with a second annular groove (127), and an outer edge of the lower flange (132) is fitted into the second annular groove (127).

8. The relay according to claim 4, wherein the insulating member (12) is formed with a first annular groove (126), an outer edge of the upper flange (133) is fitted into the first annular groove (126), the insulating member (12) is further formed with a second annular groove (127), and an outer edge of the gasket (9) is fitted into the second annular groove (127).

9. The relay according to claim 7 or 8, wherein the insulator (12) has an I-shaped longitudinal section, the insulator (12) includes a cylindrical insulator body (121), an upper radial flange (122), an upper axial flange (123), a lower radial flange (124), and a lower axial flange (125), the upper radial flange (122) extends radially from an upper end of the insulator body (121), the upper axial flange (123) extends axially upward from one end of the upper radial flange (122), the lower radial flange (124) extends radially from a lower end of the insulator body (121), the lower axial flange (125) extends axially downward from one end of the lower radial flange (124), the upper radial flange (122) abuts against an upper surface of the movable contact plate (11), and the lower radial flange (124) abuts against a lower surface of the movable contact plate (11), the first annular groove (126) is formed on the upper axial flange (123) and the second annular groove (127) is formed on the lower axial flange (125).

10. The relay according to claim 2 or 4, characterized in that the wear part body (131) comprises an upper section (1311) and a lower section (1312), the upper section (1311) having an inner diameter smaller than the inner diameter of the lower section (1312), the push rod (3) abutting the upper section (1311).

11. The relay according to claim 10, characterized in that the upper section (1311) and the lower section (1312) are in an oblique transition.

12. The relay according to claim 2 or 4, wherein the elastic member is a spring (2), the spring (2) is sleeved on the push rod (3), the relay further comprises a positioning portion (5), the positioning portion (5) is fixed on the push rod (3), and the lower end of the spring (2) abuts against the positioning portion (5).

13. The relay according to claim 1, further comprising a stationary core (6), wherein the push rod (3) is slidably disposed through the stationary core (6), and the stationary core (6) is located between the movable core (4) and the movable contact plate (11).

14. The relay according to claim 13, characterized in that the relay further comprises a return spring (7), the upper end of the return spring (7) abuts against the stationary core (6) and the lower end abuts against the movable core (4).

15. The relay according to claim 13, characterized in that the relay further comprises a carrier plate (8) for connection with a housing of the relay, the carrier plate (8) being mounted on the stationary core (6).

16. The relay according to claim 1, characterized in that the wear part (13) is made of a metallic material.

Technical Field

The disclosure relates to the technical field of relays, in particular to a relay.

Background

The relay is an electric control device, has an interactive relation between a control system and a controlled system, is usually applied to an automatic control circuit, and is actually an 'automatic switch' for controlling the operation of a large current by using a small current, so that the relay plays roles of automatic adjustment, safety protection, circuit conversion and the like in the circuit, and is widely applied to various fields.

Generally, a relay includes a stationary contact, a movable contact plate, a push rod, and an iron core capable of pushing the push rod to move under the action of an external magnetic circuit, the movable contact plate is slidably disposed on the push rod through an insulating sleeve, and the movable contact plate is provided with a movable contact in contact with the stationary contact. When the push rod moves, the push rod can drive the movable contact plate component to move towards the direction of the fixed contact, so that the movable contact is in contact with the fixed contact, the circuit is conducted, after the movable contact is in contact with the fixed contact, the push rod can continue to move along the axial direction of the push rod, the contact pressure between the movable contact and the fixed contact is increased, the movable contact and the fixed contact can be ensured to be in close contact, and the circuit can be stably conducted. In the overtravel movement process of the push rod, the movable contact is already abutted against the fixed contact, the movable contact plate does not move any more, and the push rod can continue to move along the axial direction of the push rod, namely, the push rod and the movable contact plate component move relatively, namely, the push rod and the insulating sleeve move relatively and rub. Because the insulating cover is made by plastic material usually, the push rod makes the insulating cover produce the dust granule with the insulating cover takes place the friction easily, under the high temperature, high pressure, the high current environment of relay work, the relay is punctureed easily to the dust granule to influence the life of relay.

Disclosure of Invention

The purpose of this disclosure is to provide a relay, this relay can guarantee insulating properties simultaneously, prevents effectively that push rod and insulating part from producing dust granule because of the friction to improve the life of relay.

In order to achieve the above object, the present disclosure provides a relay including a stationary contact assembly, a movable contact assembly, an elastic member, a push rod, and a movable core, where the movable contact assembly includes a movable contact, an insulating member, and a wear-resistant member, the movable contact is provided with a through hole, the insulating member and the wear-resistant member are fixedly mounted in the through hole, the insulating member is located between the wear-resistant member and the movable contact to separate the wear-resistant member from the movable contact, the lower end of the push rod is connected to the movable core, the upper end of the push rod is slidably disposed through the wear-resistant member, and the elastic member is configured to apply an elastic force toward the stationary contact assembly to the movable contact assembly.

Optionally, the wear-resistant part comprises an integrally formed cylindrical wear-resistant part body, an upper flange formed at the upper end of the wear-resistant part body, and a lower flange formed at the lower end of the wear-resistant part body, a limiting boss is formed at the upper end of the push rod, the upper flange is clamped between the limiting boss and the insulating part, the lower flange is located between the elastic part and the insulating part, and the upper end of the elastic part abuts against the lower flange.

Optionally, the movable contact plate, the insulating part and the wear-resistant part are connected by means of in-mold injection molding.

Optionally, the wear-resistant part includes an integrally formed cylindrical wear-resistant part body and an upper flange formed at the upper end of the wear-resistant part body, the relay further includes a gasket, the gasket is connected with the lower end of the wear-resistant part body, a limit boss is formed at the upper end of the push rod, the upper flange is clamped between the limit boss and the insulating part, the gasket is located between the elastic part and the insulating part, and the upper end of the elastic part abuts against the gasket.

Optionally, the movable contact plate, the insulating part, the wear-resistant part and the gasket are connected in a mode of injection molding in a mold.

Optionally, the gasket is sleeved at the lower end of the wear-resistant part body, an annular boss extending along the circumferential direction of the wear-resistant part body is formed at the lower end of the wear-resistant part body, the upper side of the annular boss forms a spigot fit with the insulating part, and the lower side of the annular boss forms a spigot fit with the gasket.

Optionally, a first annular groove is formed in the insulating member, the outer edge of the upper flange is embedded in the first annular groove, a second annular groove is further formed in the insulating member, and the outer edge of the lower flange is embedded in the second annular groove.

Optionally, a first annular groove is formed in the insulating member, an outer edge of the upper flange is embedded in the first annular groove, a second annular groove is further formed in the insulating member, and an outer edge of the gasket is embedded in the second annular groove.

Optionally, the longitudinal section of the insulator is i-shaped, the insulator includes a cylindrical insulator body, an upper radial flange, an upper axial flange, a lower radial flange and a lower axial flange, the upper radial flange extends radially from the upper end of the insulator body, the upper axial flange extends axially upward from one end of the upper radial flange, the lower radial flange extends radially from the lower end of the insulator body, the lower axial flange extends axially downward from one end of the lower radial flange, the upper radial flange is attached to the upper surface of the movable contact plate, the lower radial flange is attached to the lower surface of the movable contact plate, the first annular groove is formed in the upper axial flange, and the second annular groove is formed in the lower axial flange.

Optionally, the wear-resistant part body comprises an upper section and a lower section, the inner diameter of the upper section is smaller than that of the lower section, and the push rod is attached to the upper section.

Optionally, an oblique angle transition between the upper section and the lower section.

Optionally, the elastic member is a spring, the spring is sleeved on the push rod, the relay further includes a positioning portion, the positioning portion is fixed on the push rod, and the lower end of the spring abuts against the positioning portion.

Optionally, the relay still includes quiet iron core, the push rod slides and wears to locate quiet iron core, quiet iron core is located move the iron core with move between the touch panel.

Optionally, the relay further includes a return spring, an upper end of the return spring abuts against the stationary iron core, and a lower end of the return spring abuts against the movable iron core.

Optionally, the relay further comprises a supporting plate connected with the housing of the relay, and the supporting plate is mounted on the stationary core.

Optionally, the wear part is made of a metallic material.

Through above-mentioned technical scheme, compare with the mode that the insulating part was worn to locate in the push rod slides among the prior art, the push rod in the relay that this disclosure provided is to slide and wear to locate the wearing part to separate push rod and insulating part through the wearing part, like this, when the push rod overtravel removed, the push rod will take place relative motion and friction with the wearing part, thereby prevent push rod and insulating part friction, avoid the insulating part to produce dust particle, influence relay's normal work and life. And, because insulating part and wearing parts are in fixed mounting the through-hole on the movable contact plate, be fixed connection between movable contact plate, insulating part, and the wearing parts three, in the in-process that the push rod impels movable contact plate to move towards the stationary contact subassembly, relative motion does not take place between movable contact plate and the insulating part, relative motion does not also take place between insulating part and the wearing parts, that is to say, movable contact plate and wearing parts can not take place the friction with the insulating part yet, thereby also avoided movable contact plate and wearing parts friction to lead to the insulating part to produce the dust granule, influence the normal operating of relay.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a relay according to an exemplary embodiment of the present disclosure;

fig. 2 is a cross-sectional view of a relay according to an embodiment of the present disclosure, in which a wear member body, an upper flange, and a lower flange are integrally formed;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a cross-sectional view of a relay provided in accordance with another embodiment of the present disclosure, wherein a wear member is coupled to a washer;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is a cross-sectional view of an insulator provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1 moving contact plate component 11 moving contact plate

12 insulator 121 insulator body

122 upper radial flange 123 upper axial flange

124 lower radial flange 125 lower axial flange

126 first annular groove 127 second annular groove

13 wear part 131 wear part body

1311 upper section 1312 lower section

132 lower flange 133 upper flange

134 ring boss 2 spring

3 push rod 31 spacing boss

4 movable iron core 5 positioning part

51 positioning plate 52 flanging

6 static iron core 7 reset spring

8 supporting plate and 9 washer

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, and are not intended to limit the present disclosure.

In the present disclosure, unless otherwise specified, the terms of orientation or positional relationship such as "upper" and "lower" are used for indicating the orientation or positional relationship based on the drawings, and are only for convenience of describing the present disclosure and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific orientation and a specific orientation configuration and operation, and furthermore, "outer" and "inner" refer to outer and inner of the corresponding structural outlines.

As shown in fig. 1 to 6, the present disclosure provides a relay, which includes a fixed contact assembly (not shown), a movable contact assembly 1, an elastic member, a push rod 3, and a movable iron core 4, wherein the movable contact assembly 1 includes a movable contact plate 11, an insulating member 12, and a wear-resistant member 13, a fixed contact (not shown) is disposed on the fixed contact assembly, and a movable contact (not shown) for contacting the fixed contact to achieve circuit conduction is disposed on the movable contact plate 11. The movable contact plate 11 is provided with a through hole, the insulating part 12 and the wear-resistant part 13 are fixedly arranged in the through hole, the insulating part 12 is positioned between the wear-resistant part 13 and the movable contact plate 11 to separate the wear-resistant part 13 from the movable contact plate 11, that is, the movable contact plate 11 is fixedly arranged on the insulating part 12 through the through hole, and the insulating part 12 is fixedly arranged on the wear-resistant part 13, that is, the movable contact plate 11, the insulating part 12 and the wear-resistant part 13 are fixedly connected and do not move relatively. The lower end of the push rod 3 is connected with the movable iron core 4, the upper end of the push rod 3 is slidably arranged through the wear-resistant part 13, the wear-resistant part 13 is located between the push rod 3 and the insulating part 12 to separate the push rod 3 from the insulating part 12, and the elastic part is used for applying elastic force towards the direction of the fixed contact assembly to the movable contact assembly 1.

When an excitation signal is applied to an external coil (not shown), that is, when the power is turned on, the movable iron core 4 moves towards the direction of the stationary contact assembly under the action of electromagnetic force, so as to push the push rod 3 to move, so that the movable contact plate assembly 1 moves towards the direction of the stationary contact assembly under the pushing of the push rod 3 and the elastic force of the elastic element, and the movable contact is in contact with the stationary contact, thereby realizing the conduction of a circuit. In order to ensure the close contact between the movable contact and the fixed contact and avoid the disconnection of a circuit due to the unstable contact between the movable contact and the fixed contact, after the movable contact is contacted with the fixed contact, the push rod 3 can continuously move for a certain distance in the direction of the fixed contact assembly in an overtravel way so as to continuously apply elastic force in the direction of the fixed contact assembly to the movable contact through the elastic piece to increase the contact pressure between the movable contact and the fixed contact and enable the movable contact to always abut against the fixed contact. When the push rod 3 moves in an overtravel way, the push rod 3 only moves and rubs against the wear-resistant part 13 and does not rub against the insulating part 12 because the wear-resistant part 13 is positioned between the push rod 3 and the insulating part 12.

Through above-mentioned technical scheme, compare with the mode that the insulating part was worn to locate in the push rod slides among the prior art, push rod 3 in the relay that this disclosure provided is to slide and wear-resisting 13 of wearing parts to separate push rod 3 and insulating part 12 through wear-resisting 13, like this, when push rod 3 overtravel moves, push rod 3 will take place relative motion and friction with wear-resisting 13, thereby prevent push rod 3 and insulating part 12 friction, avoid insulating part 12 to produce dust particle, influence the normal work and the life of relay. And, because insulating part 12 and wearing parts 13 are the fixed mounting in the through-hole on the movable contact plate 11, for fixed connection between movable contact plate 11, insulating part 12, and wearing parts 13 three, in the in-process that push rod 3 promoted movable contact plate 11 and move towards the stationary contact subassembly, relative motion does not take place between movable contact plate 11 and the insulating part 12, relative motion does not also take place between insulating part 12 and wearing parts 13, that is to say, movable contact plate 11 and wearing parts 13 can not take place the friction with insulating part 12 yet, thereby it leads to insulating part 12 to produce the dust granule to have avoided movable contact plate 11 and wearing parts 13 friction, influence the normal operating of relay.

Further, in order to ensure that the wear-resistant part 13 has high hardness, wear resistance and high temperature resistance, so as to ensure that the wear-resistant part 13 does not generate dust particles during the friction process with the push rod 3, and to ensure that the wear-resistant part 13 can adapt to the high-temperature working environment of the relay, in the exemplary embodiment provided by the present disclosure, the wear-resistant part 13 is made of a metal material, for example, the wear-resistant part 13 may be made of a stainless steel material, so as to ensure that the wear-resistant part 13 has sufficient hardness and prevent the generation of dust particles. Also, the push rod 3 may be made of a metal material to prevent dust particles from being generated by the push rod 3 during friction with the wear-resistant member 13.

The above-mentioned wear-resistant member 13 may have any suitable structure and shape, as shown in fig. 2 and 3, in an embodiment provided by the present disclosure, the longitudinal section of the wear-resistant member 13 is i-shaped, the wear-resistant member 13 includes an integrally formed cylindrical wear-resistant member body 131, an upper flange 133 formed at an upper end of the wear-resistant member body 131, and a lower flange 132 formed at a lower end of the wear-resistant member body 131, the wear-resistant member body 131 is sleeved on the push rod 3 and attached to the push rod 3, the wear-resistant member body 131 is located between the push rod 3 and the insulator 12 to prevent the push rod 3 from rubbing against the insulator 12, and the wear-resistant member body 131, the upper flange 133 and the lower flange 132 make the longitudinal section of the wear-resistant member 13 i-. As described above, when the current of the external coil is cut off, the push rod 3 moves in a direction away from the stationary contact assembly to separate the movable contact from the stationary contact, and in order to prevent the upper end of the push rod 3 from sliding out of the wear-resistant member 13, as shown in fig. 3, the upper end of the push rod 3 is formed with the limiting boss 31, and the upper flange 133 is clamped between the limiting boss 31 and the insulating member 12, that is, the upper flange 133 of the wear-resistant member 13 can separate the limiting boss 31 from the insulating member 12, thereby preventing the limiting boss 31 from contacting and rubbing the insulating member 12 during the movement, and generating dust particles on the insulating member 12, which affects the normal operation and the service life of the relay.

Further, in the present disclosure, the elastic member is used to apply an elastic force to the moving contact assembly 1 in a direction toward the fixed contact assembly to increase a contact pressure between the moving contact and the fixed contact, so that an upper end of the elastic member abuts against the lower flange 132, and the lower flange 132 is located between the elastic member and the insulating member 12 and is attached to the insulating member, so that the elastic member can apply an elastic force to the lower flange 132, and the elastic force is transmitted to the moving contact 11 through the wear-resistant member 13 and the insulating member 12 in sequence, thereby pushing the moving contact 11 to move in a direction toward the fixed contact assembly. Because the elastic member is in contact with the lower flange 132, when the elastic member applies an elastic force to the movable contact assembly 1, the elastic member only rubs against the lower flange 132, and because the lower flange 132 has the characteristics of high hardness and wear resistance, the elastic member can be prevented from rubbing against the insulating member 12 in the process of applying the elastic force to the movable contact assembly 1, and dust particles are generated to influence the service life of the relay.

Further, since the insulating member 12 is required to have insulation to isolate the electrical conduction between the movable contact plate 11 and the push rod 3, so as to ensure the normal operation of the relay, the insulating member 12 is usually made of an insulating plastic material. In order to realize the fixed connection between the insulating part 12 and the wear-resistant part 13 and the movable contact plate 11, i.e. the fixed connection between the plastic material and the metal material, in an embodiment provided by the present disclosure, the movable contact plate 11, the insulating part 12, and the wear-resistant part 13 are connected by means of in-mold injection molding. In the process of in-mold injection molding, the wear-resistant part 13 and the movable contact plate 11 which are integrally formed can be placed into an injection mold, then plastic is injected into the injection mold and injected between the wear-resistant part 13 and the movable contact plate 11, so that the plastic material is cured and formed into the insulating part 12 and is combined with the movable contact plate 11 and the wear-resistant part 13 into a whole, the fixed connection among the movable contact plate 11, the insulating part 12 and the wear-resistant part 13 is realized, and the contact plate 11, the wear-resistant part 13 and the insulating part 12 are prevented from being rubbed to generate dust particles.

As shown in fig. 4 and 5, in another embodiment provided by the present disclosure, the longitudinal section of the wear-resistant part 13 is T-shaped, the wear-resistant part 13 includes a cylindrical wear-resistant part body 131 formed integrally with an upper flange 133 formed at the upper end of the wear-resistant part body 131, as mentioned above, the upper end of the push rod 3 is formed with the limit boss 31, and the upper flange 133 is clamped between the limit boss 31 and the insulating part 12 to prevent the limit boss 31 from contacting and rubbing the insulating part 12 during the movement process, so that the insulating part 12 generates dust particles, which affects the normal operation and the service life of the relay. The relay further comprises a gasket 9, the gasket 9 is connected with the lower end of the wear-resistant part body 131, the gasket 9 is located between the elastic part and the insulating part 12, and the upper end of the elastic part abuts against the gasket 9, so that the phenomenon that the elastic part rubs against the insulating part 12 in the process of applying elastic force to the movable contact plate component 1 to generate dust particles to influence the service life of the relay is avoided.

In order to ensure that the gasket 9 has the characteristics of high hardness, wear resistance and high temperature resistance, so as to ensure that the elastic member does not generate dust particles during the friction process with the gasket 9, and to ensure that the gasket 9 can adapt to the high-temperature working environment of the relay, in an embodiment provided by the present disclosure, the gasket 9 may be made of a metal material. Furthermore, in order to facilitate the connection of the washer 9 to the wear part body 131, the washer 9 may be made of the same wear-resistant material as the wear part 13.

Further, as mentioned above, the insulating member 12 is usually made of an insulating plastic material to ensure its insulation. In order to realize the fixed connection between the insulating part 12 and the wear-resistant part 13, the movable contact plate 11 and the gasket 9, i.e. the fixed connection between the plastic material and the metal material, in an embodiment provided by the present disclosure, the movable contact plate 11, the insulating part 12, the wear-resistant part 13 and the gasket 9 are connected by means of in-mold injection molding. In the process of in-mold injection molding, the movable contact plate 11, the gasket 9 and the integrally formed wear-resistant part 13 can be placed into an injection mold, and then plastic is injected into the injection mold to realize the fixed connection among the movable contact plate 11, the insulating part 12, the wear-resistant part 13 and the gasket 9, so that the movable contact plate 11, the wear-resistant part 13, the gasket 9 and the insulating part 12 are prevented from being rubbed to generate dust particles, and the service life of the relay is prevented from being influenced.

Further, as shown in fig. 5, the washer 9 is sleeved on the lower end of the wear-resistant part body 131, the wear-resistant part body 131 is located between the push rod 3 and the washer 9, the lower end of the wear-resistant part body 131 is formed with an annular boss 134 extending along the circumferential direction of the wear-resistant part body 131, the upper side of the annular boss 134 forms a spigot fit with the insulating part 12, and the lower side of the annular boss 134 forms a spigot fit with the washer 9. The annular boss 134 may serve as a locating feature to facilitate locating the wear part 13 on the insulator 12 during assembly and also to facilitate assembly of the wear part 13 with the insulator 12.

Further, in the present disclosure, in either the embodiment in which the upper flange 133 and the lower flange 132 are integrally formed with the wear-resistant body 131 or the embodiment in which the washer 9 is connected with the wear-resistant body 131, the wear-resistant body 131 has an integrally formed inner wall, in other words, there is no gap or connection trace on the inner wall of the wear-resistant body 131, so that the friction force between the wear-resistant body 131 and the push rod can be reduced, and the phenomenon of stress concentration of the wear-resistant body 131 due to the gap or connection trace on the inner wall can be avoided, thereby reducing the possibility of fracture failure of the wear-resistant body 131.

Further, in one embodiment, the elastic member may be a spring 2, the spring 2 is sleeved on the push rod 3, and an upper end of the spring 2 abuts against the lower flange 132 or the washer 9. In order to fix the spring 2 on the push rod 3 and apply an elastic force to the moving contact assembly 1 in a direction toward the stationary contact assembly, as an embodiment, as shown in fig. 2 and 4, the relay further includes a positioning portion 5, the positioning portion 5 is fixed on the push rod 3, and a lower end of the spring 2 abuts against the positioning portion 5, so that the elastic force applied to the moving contact assembly 1 in the direction toward the stationary contact assembly by the spring 2 is realized. When the external coil is electrified, the push rod 3 moves towards the direction close to the static contact assembly, the positioning part 5 compresses the spring 2 towards the direction of the static contact assembly, the elastic force of the spring 2 is transmitted to the movable contact plate 11 through the abrasion-resistant part 13 or the gasket 9 and the insulating part 12, and therefore the movable contact is in close contact with the static contact; when the external coil is powered off, the electromagnetic force acting on the movable iron core 4 disappears, the spring 2 opens and drives the movable contact plate assembly 1 and the push rod 3 to move towards the direction far away from the fixed contact assembly, so that the movable contact plate assembly 1 and the push rod 3 return to the initial positions.

In a specific embodiment provided by the present disclosure, as shown in fig. 2, the positioning portion 5 includes a positioning plate 51 and a flange 52 formed on the positioning plate 51, the flange 52 extends from an edge of the positioning plate 51 toward the movable contact plate assembly 1, a via hole for the push rod 3 to pass through is formed on the positioning plate 51, the push rod 3 is fixedly connected with the via hole, a lower end of the spring 2 abuts against the positioning plate 51, and the flange 52 is located on an outer side of the spring 2 to protect the spring 2.

In prior art, the upper end of spring is direct butt in the movable contact plate usually, like this, in order to prevent that the current from passing through the spring and transmitting to the push rod, also need set up insulating cover between spring and the push rod, that is to say, the spring is established on the push rod through insulating ways, and the lower extreme and the insulating cover butt of spring to realize insulating effect. Thus, during the expansion and contraction of the spring, the spring may also rub against the insulating sheath, causing the insulating sheath to generate dust particles. However, in the present disclosure, the upper end of the spring 2 abuts against the lower flange 132 of the wear-resistant part 13 or the washer 9, rather than directly abutting against the movable contact plate 11, and the insulating part 12 is located between the wear-resistant part 13 and the movable contact plate 11, or between the washer 9 and the movable contact plate 11, and the wear-resistant part 13 or the washer 9 is already insulated by the insulating part 12, so that the upper end of the spring 2 abuts against the wear-resistant part 13 or the washer 9 to achieve an insulating effect, and thus an insulating structure is not required to be arranged at the spring 2, which not only simplifies the structure of the insulating part 12, but also prevents the spring 2 from rubbing against the insulating part 12 during the expansion and contraction process to generate dust particles to affect the service life of the relay.

In addition, as shown in fig. 3 and 5, in the embodiment where the wear-resistant part 13 includes the wear-resistant part body 131, the upper flange 133 and the lower flange 132 which are integrally formed, the insulating part 12 is formed with the first annular groove 126, the outer edge of the upper flange 133 is embedded in the first annular groove 126, the insulating part 12 is further formed with the second annular groove 127, and the outer edge of the lower flange 132 is embedded in the second annular groove 127, so that the connection between the insulating part 12 and the wear-resistant part 13 is stable and reliable, and relative movement between the wear-resistant part 13 and the insulating part 12 is ensured not to occur, thereby preventing the wear-resistant part 13 from rubbing against the insulating part 12 to generate dust particles.

As shown in fig. 5 and 6, in the embodiment of the relay including the wear-resistant member 13 and the washer 9, the insulating member 12 is formed with a first annular groove 126, the outer edge of the upper flange 133 is embedded in the first annular groove 126, the insulating member 12 is further formed with a second annular groove 127, and the outer edge of the washer 9 is embedded in the second annular groove 127, so that the connection between the insulating member 12 and the wear-resistant member 13 is stable and reliable, and relative movement among the wear-resistant member 13, the washer 9 and the insulating member 12 is ensured not to occur, thereby preventing the wear-resistant member 13 from rubbing the insulating member 12 to generate dust particles.

Moreover, since the outer edge of the upper flange 133 is embedded in the first annular groove 126 and the outer edge of the lower flange 132 or the outer edge of the washer 9 is embedded in the second annular groove 127, it is ensured that the wear-resistant member 13 and the washer 9 are insulated by the insulating member 12, thereby ensuring that the spring 2 can be insulated and preventing the spring 2 from influencing the relay operation due to conduction.

Further, the longitudinal section of the insulating member 12 is h-shaped, the insulating member 12 includes a cylindrical insulating member body 121, an upper radial flange 122, an upper axial flange 123, a lower radial flange 124, and a lower axial flange 125, the upper radial flange 122 extends radially from the upper end of the insulating member body 121 toward the movable contact plate 11, the upper axial flange 123 extends axially from one end of the upper radial flange 122, the lower radial flange 124 extends radially from the lower end of the insulating member body 121 toward the movable contact plate 11, and the lower axial flange 125 extends axially from one end of the lower radial flange 124. The lower surface of the upper radial flange 122 abuts the upper surface of the movable contact plate 11, and the upper surface of the lower radial flange 124 abuts the lower surface of the movable contact plate 11, so that the movable contact plate 11 is sandwiched between the upper radial flange 122 and the lower radial flange 124. A first annular groove 126 is formed on the upper axial flange 123 so that the outer edge of the upper flange 133 can be inserted into the first annular groove 126, and a second annular groove 127 is formed on the lower axial flange 125 so that the outer edge of the lower flange 132 or the outer edge of the washer 9 can be inserted into the second annular groove 127.

Further, in one embodiment, the insulator 12 may be manufactured by integral molding, that is, the insulator body 121, the upper radial flange 122, the upper axial flange 123, the lower radial flange 124, and the lower axial flange 125 are integrally installed in the through hole of the moving contact plate 11. In other embodiments, the insulating member 12 may also be formed by connecting the insulating member body 121, the upper radial flange 122, the upper axial flange 123, the lower radial flange 124, and the lower axial flange 125 to each other, and be fitted in the through hole of the movable contact plate 11.

In addition, as shown in fig. 3 and 5, the wear-resistant member body 131 includes an upper section 1311 and a lower section 1312, the inner diameter of the upper section 1311 is smaller than the inner diameter of the lower section 1312, the push rod 3 is attached to the upper section 1311 of the wear-resistant member body 131, and a gap exists between the push rod 3 and the lower section 1312 of the wear-resistant member body 131, so that the friction force between the push rod 3 and the wear-resistant member body 131 can be reduced, and further abutting and pressing between the movable contact and the stationary contact can be affected due to the fact that the push rod 3 is blocked by excessive friction in the process that the push rod 3 moves in the overtravel movement direction of the push rod 3 towards the stationary contact assembly.

Further, in the exemplary embodiment provided by the present disclosure, the upper section 1311 of the wear part body 131 and the lower section 1312 of the wear part body 131 are in a bevel transition to prevent a stress concentration phenomenon between the upper section 1311 of the wear part body 131 and the lower section 1312 of the wear part body 131, which may result in the breakage of the wear part body 131 and affect the relay operation. In other embodiments, the upper section 1311 of the wear part body 131 may also transition in a circular arc with the lower section 1312 of the wear part body 131.

As shown in fig. 1 and fig. 2, in order to ensure that the movable iron core 4 can move under the action of electromagnetic force, in an embodiment provided by the present disclosure, the relay further includes a stationary iron core 6, the push rod 3 is slidably disposed through the stationary iron core 6, the stationary iron core 6 is located between the movable iron core 4 and the movable contact plate 11, in the working process of the relay, the stationary iron core 6 is fixed, when the external coil is energized, the stationary iron core 6 is magnetized, thereby generating magnetic attraction to attract the movable iron core 4 to move towards the direction close to the stationary iron core 6, and the movable iron core 4 pushes the push rod 3 and the movable contact plate 11 to move towards the direction close to the stationary contact assembly. Because the push rod 3 is slidably arranged in the static iron core 6 in a penetrating way, the static iron core 6 not only can be used for attracting the movable iron core 4, but also can play a guiding role for the push rod 3 so as to ensure that the push rod 3 can keep linear motion, thereby ensuring that the movable contact can be contacted with the static contact. In addition, because quiet iron core 6 and movable iron core 4 can be set up along the axis interval of push rod 3, that is to say, there is certain clearance between movable iron core 4 and the quiet iron core 6, and this clearance is the mobilizable biggest stroke of push rod 3 promptly, therefore, quiet iron core 6 still has the effect of control push rod 3 removal stroke, can adjust the removal stroke of push rod 3 through adjusting the distance between movable iron core 4 and the quiet iron core 6 to ensure movable contact and stationary contact in close contact with.

Further, for fixing the stationary core 6, the stationary core 6 is not moved during the operation of the relay, so as to better attract the movable core 4, in the present disclosure, as shown in fig. 1 and 2, the relay further includes a supporting plate 8 for being connected with a housing (not shown) of the relay, and the supporting plate 8 is installed on the stationary core 6, so that the stationary core 6 is installed and fixed on the housing of the relay through the supporting plate 8.

Further, as shown in fig. 2, the relay further includes a return spring 7, the return spring 7 is tensioned between the stationary core 6 and the movable core 4, an upper end of the return spring 7 abuts against the stationary core 6, and a lower end abuts against the movable core 4. When external coil circular telegram, quiet iron core 6 adsorbs and moves iron core 4, move iron core 4 compression reset spring 7, make reset spring 7 deposit will move the elastic force that iron core 4 rebounded its initial position, thus, when the external coil outage, quiet iron core 6 loses magnetism, move iron core 4 and move towards the direction of keeping away from quiet iron core 6 under the elastic force's of reset spring 7 deposit effect, reset spring 7 and spring 2 cooperation drive push rod 3 and movable contact board subassembly 1 jointly and move towards the direction removal of keeping away from the stationary contact subassembly, make stationary contact and movable contact separation, thereby realize cutting off of circuit.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various technical features described in the above embodiments may be combined in any suitable manner without contradiction, and the disclosure does not separately describe various possible combinations in order to avoid unnecessary repetition.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.