relay

Abstract

The application discloses a relay, which comprises a pair of static contacts, a pair of conductive parts and a moving contact. The pair of static contacts are arranged along a first direction. The conductive parts have conductive sections, the conductive sections of the pair of conductive parts are respectively connected to the pair of static contacts, and the conductive sections extend away from each other along the first direction, and the ends of the conductive sections away from the static contacts are static contact points. The moving contact is used to contact or separate the static contact points of the conductive sections of the pair of conductive parts, and the respective orthographic projections of the moving contact and the conductive sections on a target plane overlap. The target plane is perpendicular to the moving direction of the moving contact.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] A relay includes a stationary contact, a moving contact, a push rod assembly, and a magnetic circuit. When the coil of the magnetic circuit is energized or de-energized, the magnetic circuit drives the push rod assembly to move, which in turn moves the moving contact, causing it to contact or separate from the stationary contact. After the moving contact contacts the stationary contact, an electric arc can easily be generated between them. If the arc is not stretched in time, it can easily burn the stationary contact and / or the moving contact, thus affecting the electrical durability of the stationary and moving contacts. Summary of the Invention

[0004] This application provides a relay that can promptly lengthen the electric arc generated between the moving contact and the stationary contact, thereby improving the electrical durability of the moving contact and the moving contact piece.

[0005] The relay in this application embodiment includes:

[0006] A pair of stationary contacts are arranged along the first direction;

[0007] A pair of conductive elements, each having a conductive portion, the conductive portions of the pair of conductive elements being respectively connected to a pair of stationary contacts and extending along the first direction in a direction away from each other, the end of the conductive portion away from the stationary contact being a stationary contact point; and

[0008] A movable contact is used to contact or separate from the stationary contact of the conductive portion of a pair of conductive elements, and the orthographic projections of the movable contact and the conductive portion on a target plane overlap.

[0009] The target plane is perpendicular to the direction of movement of the moving contact piece.

[0010] According to some embodiments of this application, the conductive element further includes a first arc-guided portion, which is connected to the end of the conductive portion away from the stationary contact and extends from the conductive portion in a direction away from the moving contact and the stationary contact.

[0011] According to some embodiments of this application, the first arc-guided portions of a pair of conductive elements are symmetrically arranged in the first direction.

[0012] According to some embodiments of this application, the first arc-guiding portion and the conductive portion are either an integral structure or separate structures.

[0013] According to some embodiments of this application, the movable contact includes:

[0014] The body, with two ends along the first direction for contacting or separating from the stationary contacts of the conductive portions of the pair of conductive elements, respectively; and

[0015] Two second arc-shaped portions are respectively connected to the two ends of the body along the first direction, and the second arc-shaped portions extend from the body in a direction away from the conductive element and the stationary contact.

[0016] According to some embodiments of this application, the two second guide arc portions are symmetrically arranged in the first direction.

[0017] According to some embodiments of this application, the second guide arc portion and the main body are either an integral structure or separate structures.

[0018] According to some embodiments of this application, the relay further includes:

[0019] Two arc-extinguishing grid assemblies are arranged at intervals along the first direction, and the movable contact is located between the two arc-extinguishing grid assemblies. The second arc-guiding portion of the movable contact extends toward the arc-extinguishing grid assembly. The arc-extinguishing grid assembly includes a plurality of arc-extinguishing grid plates, which are arranged at intervals along the movement direction of the movable contact.

[0020] According to some embodiments of this application, the conductive part and the stationary contact are either an integral structure or separate structures.

[0021] According to some embodiments of this application, the moving contact includes a body, with two ends of the body along the first direction for contacting or separating from the stationary contacts of the conductive portions of a pair of conductive elements, respectively; the conductive portions are parallel to the body.

[0022] According to some embodiments of this application, the relay further includes an insulating cover made of ceramic material, the insulating cover comprising:

[0023] The stationary contact is mounted on the top wall;

[0024] The sidewall is connected to the top wall and is located around the movable contact piece.

[0025] The relay in this application embodiment includes:

[0026] A pair of stationary contacts;

[0027] A pair of conductive elements, respectively connected to a pair of stationary contacts; and

[0028] A movable contact piece is used to contact or separate from a pair of said conductive elements;

[0029] The movable contact piece is in contact with a pair of conductive elements, and when current flows through the stationary contact, the conductive elements and the movable contact piece, the current in the two conductive elements flows in the same direction and in the opposite direction to the current in the movable contact piece.

[0030] An embodiment of the above application has at least the following advantages or beneficial effects:

[0031] When current flows through a pair of stationary contacts of a relay, the current flows in the same direction in the conductive parts of the pair of conductive elements, while the current flows in the opposite direction in the moving contact. Therefore, the opposite current flow between the moving contact and the conductive parts creates a repulsive force along a second direction between the moving contact and the conductive parts. This second direction is the separation direction of the moving and stationary contacts. The repulsive force generated by the opposite current facilitates rapid separation between the moving contact and the conductive parts, thus quickly lengthening the arc generated between them, shortening the arc extinguishing time, preventing arc erosion of the moving and stationary contacts, and improving the electrical durability of the moving and stationary contacts. Attached Figure Description

[0032] Figure 1 The diagram shown is a cross-sectional view of a relay according to an embodiment of this application, wherein the push rod component is omitted.

[0033] Figure 2 The diagram shown is a three-dimensional representation of the moving contact.

[0034] Figure 3 The diagram shown is a schematic of the stationary contact and conductive components assembled together.

[0035] Figure 4 The diagram shows an arc-extinguishing grid assembly on both sides of the moving contact along the first direction.

[0036] The reference numerals in the attached figures are explained as follows:

[0037] 100. Magnetic Circuit Section

[0038] 210. Insulating cover

[0039] 211. Top Wall

[0040] 212. Sidewall

[0041] 220. Frame piece

[0042] 230. Yoke plate

[0043] 300. Stationary contact

[0044] 400. Conductive components

[0045] 410. Conductive parts

[0046] 420. First guide arc section

[0047] 500, Moving contact plate

[0048] 510. Ontology

[0049] 520. Second guide arc section

[0050] 600. Arc-extinguishing grid assembly Detailed Implementation

[0051] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0052] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0053] like Figures 1 to 3 As shown, the relay in this embodiment of the application includes a magnetic circuit portion 100, a yoke plate 230, an insulating cover 210, a push rod component (not shown in the figure), a pair of stationary contacts 300, a pair of conductive elements 400, and a moving contact piece 500.

[0054] The insulating cover 210, stationary contact 300, conductive element 400, and moving contact 500 are located on one side of the yoke plate 230 along its thickness direction, while the magnetic circuit portion 100 is located on the other side of the yoke plate 230 along its thickness direction. The yoke plate 230 has a through hole (not shown) that extends through the yoke plate 230 along its thickness direction. The push rod member is movably inserted through this through hole.

[0055] A pair of stationary contacts 300 are mounted on an insulating cover 210, and a movable contact 500 is mounted on a push rod component. The magnetic circuit part 100 can drive the push rod component to move, thereby driving the movable contact 500 to move, so that the movable contact 500 can be connected or disconnected from the pair of stationary contacts 300.

[0056] The insulating cover 210 is made of ceramic and can be connected to the yoke plate 230 via a frame plate 220. The frame plate 220 can be a ring-shaped metal component, such as an iron-nickel alloy. One end of the frame plate 220 is connected to the opening edge of the insulating cover 210, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame plate 220 is connected to the yoke plate 230, also by laser welding, brazing, resistance welding, or adhesive bonding. A frame plate 220 is provided between the insulating cover 210 and the yoke plate 230 to facilitate their connection.

[0057] like Figure 1 As shown, the insulating cover 210 includes a top wall 211 and a side wall 212. The stationary contact 300 is mounted on the top wall 211. One end of the side wall 212 is connected to the top wall 211, and the other end of the side wall 212 is connected to the yoke plate 230 via a frame plate 220. The side wall 212 has an annular structure and is located around the moving contact 500. The side wall 212 of the insulating cover 210, located around the moving contact 500, serves to cool the electric arc.

[0058] The sidewall 212 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes. This application does not make any special limitation on this.

[0059] For ease of explanation, the arrangement direction of a pair of stationary contacts 300 is defined as the first direction D1, and the movement direction of the moving contact 500 is defined as the second direction D2. The first direction D1 is perpendicular to the second direction D2.

[0060] Each conductive element 400 has a conductive portion 410. The conductive portions 410 of a pair of conductive elements 400 are respectively connected to a pair of stationary contacts 300 and extend in a direction away from each other along the first direction D1. The end of the conductive portion 410 away from the stationary contact 300 is the stationary contact point.

[0061] The movable contact 500 is used to contact or separate from the stationary contact of the conductive part 410 of a pair of conductive members 400, and the orthographic projections of the movable contact 500 and the conductive part 410 on a target plane overlap; wherein the target plane is perpendicular to the movement direction (second direction D2) of the movable contact 500.

[0062] like Figure 1 As shown, if the current flows in from the left stationary contact 300 and out from the right stationary contact 300, the current flow direction of the relay is as follows: first, it flows from the left stationary contact 300 into the conductive part 410 of the left conductive element 400, then into the moving contact 500, then from the moving contact 500 into the conductive part 410 of the right conductive element 400, and finally out from the right stationary contact 300.

[0063] It can be seen that when current flows through a pair of stationary contacts 300 of the relay, the current flow direction of the conductive parts 410 of the pair of conductive elements 400 is the same, while the current flow direction of the moving contact 500 is opposite to that of the conductive parts 410. Therefore, the current flow direction of the moving contact 500 and the conductive parts 410 is opposite, and the opposite current can form a repulsive force along the second direction D2 between the moving contact 500 and the conductive parts 410. The second direction D2 is the separation direction of the moving contact 500 and the conductive parts 410. Therefore, the repulsive force generated by the opposite current is conducive to the rapid separation of the moving contact 500 and the conductive parts 410, so as to quickly lengthen the arc generated between the moving contact 500 and the conductive parts 410, thereby shortening the arc extinguishing time, avoiding arc erosion of the moving and stationary contacts, and improving the electrical durability of the moving contact 500 and the stationary contact 300. At the same time, as the arcing time decreases, the increase in air pressure inside the insulating cover 210 also decreases, thus preventing an explosion due to overpressure in the insulating cover 210.

[0064] Furthermore, it is understandable that the greater the current flowing through the pair of stationary contacts 300 of the relay, the greater the repulsive force will be. When a load current flows through the pair of stationary contacts 300, the repulsive force generated between the moving contact 500 and the conductive part 410 can quickly spring the moving contact 500 away, which helps to limit the peak current and improve safety.

[0065] like Figure 1 and Figure 3 As shown, the conductive element 400 also includes a first arc-guided portion 420, which is connected to the end of the conductive element 410 away from the stationary contact 300 and extends from the conductive element 410 in a direction away from the moving contact 500 and the stationary contact 300.

[0066] In this embodiment, by providing a first arc-guiding portion 420, the electric arc generated between the moving contact 500 and the conductive portion 410 can be elongated along the extending direction of the first arc-guiding portion 420, thereby further shortening the arc extinguishing time and preventing the arc from burning the moving and stationary contacts for a long time. Furthermore, with the aid of the first arc-guiding portion 420, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 420, thereby reducing the loss of the contact surface of the moving and stationary contacts and reducing the occurrence of arc spikes, ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0067] Among them, the phenomenon of sharpening refers to the phenomenon that, under long-term operation or high load, the contact surface develops sharp protrusions or deformations due to current, electric arc or mechanical wear.

[0068] In one embodiment, the first arc-guided portions 420 of a pair of conductive elements 400 are symmetrically arranged in a first direction D1.

[0069] Of course, in other embodiments, the first arc portion 420 of a pair of conductive elements 400 may also be asymmetrically arranged. For example, one of the first arc portion 420 may be longer than the other; or, one of the first arc portion 420 may form a smaller angle with the corresponding conductive portion 410, while the other may form a larger angle with the corresponding conductive portion 410.

[0070] In one embodiment, the conductive part 410 and the stationary contact 300 can be an integral structure or separate structures. When the conductive part 410 and the stationary contact 300 are separate structures, they can be connected by riveting, welding, gluing, or other methods. When the conductive part 410 and the stationary contact 300 are an integral structure, the stationary contact 300 and the conductive part 410 can be formed by machining, punching, powder metallurgy, casting, or other methods.

[0071] Furthermore, the first arc-guiding portion 420 and the conductive portion 410 can be an integral structure or separate structures.

[0072] like Figure 1 and Figure 2 As shown, the moving contact 500 includes a body 510 and two second arc-shaped portions 520. The body 510 can be an elongated structure, and its length direction is parallel to the first direction D1. The two ends of the body 510 along the first direction D1 are used to contact or separate from the stationary contacts of the conductive portions 410 of a pair of conductive elements 400, respectively. The two second arc-shaped portions 520 are respectively connected to the two ends of the body 510 along the first direction D1, and the second arc-shaped portions 520 extend from the body 510 in a direction away from the conductive elements 400 and the stationary contact 300.

[0073] In the embodiments of this application, the corresponding second arc-guiding portion 520 and the first arc-guiding portion 420 can elongate the arc generated between the moving contact 500 and the conductive portion 410, thereby further shortening the arc extinguishing time and preventing the arc from burning the moving and stationary contacts for a long time. In addition, the first arc-guiding portion 420 and the second arc-guiding portion 520 can jointly transfer the arc from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 420 and / or the second arc-guiding portion 520, thereby reducing the loss of the contact surface of the moving and stationary contacts and reducing the occurrence of arcing, ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0074] As an example, the conductive portion 410 of the conductive member 400 is parallel to the body 510 of the movable contact 500.

[0075] In one embodiment, two second guide arc portions 520 are symmetrically arranged in the first direction D1.

[0076] Of course, in other embodiments, the two second guide arc portions 520 may also be arranged asymmetrically. For example, one of the second guide arc portions 520 may be longer than the other; or, one of the second guide arc portions 520 may form a smaller angle with the body 510, while the other second guide arc portion 520 may form a larger angle with the body 510.

[0077] In one embodiment, the second guide arc portion 520 and the body 510 are either an integral structure or separate structures. When the second guide arc portion 520 and the body 510 are separate structures, they can be connected by riveting, welding, gluing, or other methods. When the second guide arc portion 520 and the body 510 are an integral structure, the movable contact piece 500 can be formed by machining, punching, powder metallurgy, casting, or other methods.

[0078] like Figure 4 As shown, the relay also includes two arc-extinguishing grid assemblies 600, which are disposed within the insulating cover 210 and spaced apart along the first direction D1. A moving contact 500 is located between the two arc-extinguishing grid assemblies 600. The second arc-guiding portion 520 of the moving contact 500 extends towards the arc-extinguishing grid assembly 600, and the first arc-guiding portion 420 extends towards the arc-extinguishing grid assembly 600. Each arc-extinguishing grid assembly 600 includes multiple arc-extinguishing grid plates, which are spaced apart along the movement direction of the moving contact 500.

[0079] In this embodiment of the application, the moving contact 500 is provided with arc-extinguishing grid assemblies 600 on both sides along the first direction D1. When the electric arc generated between the moving contact 500 and the conductive part 410 is elongated, the electric arc can quickly enter the arc-extinguishing grid assembly 600. The multiple arc-extinguishing grid plates of the arc-extinguishing grid assembly 600 isolate the electric arc to achieve arc extinguishing, further shortening the arc extinguishing time and avoiding the electric arc from burning the moving and stationary contacts for a long time.

[0080] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0081] When current flows through a pair of stationary contacts 300 of the relay, the current flows in the same direction in the conductive portions 410 of the pair of conductive elements 400, while the current flows in the opposite direction in the moving contact 500. Therefore, the opposite current flows in the moving contact 500 and the conductive portion 410, creating a repulsive force along a second direction D2 between the moving contact 500 and the conductive portion 410. This second direction D2 is the direction of separation between the moving and stationary contacts of the moving contact 500 and the conductive portion 410. The repulsive force generated by the opposite current facilitates rapid separation between the moving contact 500 and the conductive portion 410, thus quickly lengthening the arc generated between them, shortening the arc extinguishing time, preventing arc erosion of the moving and stationary contacts, and improving the electrical durability of the moving contact 500 and the stationary contact 300. At the same time, as the arcing time decreases, the increase in gas pressure inside the insulating cover 210 also decreases, thus preventing an explosion due to overpressure in the insulating cover 210.

[0082] Furthermore, it is understandable that the greater the current flowing through the pair of stationary contacts 300 of the relay, the greater the repulsive force will be. When a load current flows through the pair of stationary contacts 300, the repulsive force generated between the moving contact 500 and the conductive part 410 can quickly spring the moving contact 500 away, which helps to limit the peak current and improve safety.

[0083] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0084] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0085] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0086] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: A pair of stationary contacts are arranged along the first direction; A pair of conductive elements, each having a conductive portion, the conductive portions of the pair of conductive elements being respectively connected to a pair of stationary contacts and extending in a direction away from each other along the first direction, the end of the conductive portion away from the stationary contact being a stationary contact point; as well as A movable contact is used to contact or separate from the stationary contact of the conductive portion of a pair of conductive elements, and the orthographic projections of the movable contact and the conductive portion on a target plane overlap. The target plane is perpendicular to the direction of movement of the moving contact piece.

2. The relay according to claim 1, characterized in that, The conductive element further includes a first arc-shaped portion, which is connected to the end of the conductive portion away from the stationary contact and extends from the conductive portion in a direction away from the moving contact and the stationary contact.

3. The relay according to claim 2, characterized in that, The first arc-shaped portions of the pair of conductive elements are symmetrically arranged in the first direction.

4. The relay according to claim 2, characterized in that, The first arc-guided portion and the conductive portion are either an integral structure or separate structures.

5. The relay according to any one of claims 1-4, characterized in that, The movable contact includes: The body, with two ends along the first direction for contacting or separating from the stationary contacts of the conductive portions of the pair of conductive elements, respectively; and Two second arc-shaped portions are respectively connected to the two ends of the body along the first direction, and the second arc-shaped portions extend from the body in a direction away from the conductive element and the stationary contact.

6. The relay according to claim 5, characterized in that, The two second guide arc portions are symmetrically arranged in the first direction.

7. The relay according to claim 5, characterized in that, The second guide arc portion and the main body are either an integral structure or separate structures.

8. The relay according to claim 5, characterized in that, The relay also includes: Two arc-extinguishing grid assemblies are arranged at intervals along the first direction, and the movable contact is located between the two arc-extinguishing grid assemblies. The second arc-guiding portion of the movable contact extends toward the arc-extinguishing grid assembly. The arc-extinguishing grid assembly includes a plurality of arc-extinguishing grid plates, which are arranged at intervals along the movement direction of the movable contact.

9. The relay according to claim 1, characterized in that, The conductive part and the stationary contact can be an integral structure or separate structures.

10. The relay according to claim 1, characterized in that, The moving contact includes a body, and the two ends of the body along the first direction are used to contact or separate from the stationary contacts of the conductive parts of a pair of conductive elements, respectively. The conductive part is parallel to the body.

11. The relay according to claim 1, characterized in that, The relay also includes an insulating cover made of ceramic material, the insulating cover comprising: The stationary contact is mounted on the top wall; The sidewall is connected to the top wall and is located around the movable contact piece.

12. A relay, characterized in that, include: A pair of stationary contacts; A pair of conductive elements are respectively connected to the pair of stationary contacts; as well as A movable contact piece is used to contact or separate from a pair of said conductive elements; The movable contact piece is in contact with a pair of conductive elements, and when current flows through the stationary contact, the conductive elements and the movable contact piece, the current in the two conductive elements flows in the same direction and in the opposite direction to the current in the movable contact piece.

Images