Relay with grounding function

Abstract

The utility model discloses a relay with a grounding function, which comprises a shell part and two PE (Poly Ethylene) leading-out ends arranged on the shell part, a conductive piece used for conducting the two PE leading-out ends is arranged between the two PE leading-out ends, and the conductive piece is positioned in the shell part. When the relay provided by the utility model is applied to an electric power system, a grounding function can be realized only by connecting one PE leading-out end with a PE wire of the electric power system, so that the application safety of the relay is greatly improved, and the safety problem of accidental electric shock of personnel caused by insulation aging of a shell part and a load wire inlet end of the relay is avoided.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a relay with grounding function. Background Technology

[0002] An electromagnetic relay is an electronic control device that is commonly used in automatic control circuits. It is essentially an "automatic switch" that uses a smaller current to control a larger current, and thus plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] Electromagnetic relays are widely used in power systems. Therefore, the load terminals of electromagnetic relays used in power systems are usually in a high-voltage environment. When the insulation of the high-voltage input terminal connected to the load terminal of the electromagnetic relay is damaged or aged, or when the insulation of the relay housing itself is aged, leakage is likely to occur, which poses a safety hazard of accidental electric shock when maintenance personnel perform on-site inspection and maintenance of the relay. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a relay with a grounding function. By setting two PE leads, the relay can achieve the grounding function, thus solving the safety problem caused by the aging of the insulation of the relay housing.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a relay with grounding function, including a housing part, and two PE leads installed in the housing part, with a conductive element for conducting the two PE leads between the two PE leads, and the conductive element is located inside the housing part.

[0006] Furthermore, each of the two PE leads is provided with a first contact, and each of the two ends of the conductive element is provided with a second contact that is opposite to the first contact on the two PE leads. The conductive element is driven by a driving element so that the second contacts at both ends of the conductive element are closed or open with the first contacts of the two PE leads.

[0007] Furthermore, it also includes a contact structure disposed within the housing portion. The contact structure includes a contact support, a movable contact portion mounted on the contact support and having a movable contact, and a stationary contact portion disposed corresponding to the movable contact portion and having a stationary contact. The contact support is movably disposed within the housing portion to drive the movable contact to close or open with the stationary contact. The conductive element is mounted on the contact support, and the contact support constitutes the driving element.

[0008] Furthermore, the moving contact and the stationary contact cooperate to form a main contact, and the first contact and the second contact cooperate to form a grounding contact. The opening and closing states of the main contact are opposite to those of the grounding contact.

[0009] Furthermore, a first spring is provided between the contact support and the moving contact portion, the first spring being located on the side of the moving contact portion opposite to the stationary contact portion; a second spring is provided between the contact support and the conductive element, the second spring being located on the side of the conductive element opposite to the first contact.

[0010] Furthermore, the PE lead-out terminal is L-shaped, with one side located on one side of the direction of movement of the conductive component and provided with the first contact point, and the other side extending to the other side of the direction of movement of the conductive component; one side of the two PE lead-out terminals is arranged opposite to each other.

[0011] Furthermore, the moving contact portion includes a first moving contact bridge, with the moving contact points respectively provided at both ends of the first moving contact bridge; the stationary contact portion includes two stationary contacts, with the stationary contacts respectively provided opposite to the moving contacts at both ends of the first moving contact bridge; the conductive element is a second moving contact bridge, with the second contact points respectively provided at both ends of the second moving contact bridge.

[0012] Furthermore, it also includes an auxiliary contact assembly located on one side of the movement direction supported by the contact. The auxiliary contact assembly includes an auxiliary moving spring with an auxiliary moving contact and an auxiliary stationary spring with an auxiliary stationary contact. The auxiliary moving spring is supported and pushed by the contact to close or open the auxiliary moving contact and the auxiliary stationary contact.

[0013] Furthermore, the auxiliary contact assembly also includes an insulated auxiliary support, in which the auxiliary moving spring and the auxiliary stationary spring are respectively installed. The auxiliary moving spring is provided with a mating part that is supported and pushed by the contact. The mating part, the first lead-out piece of the auxiliary moving spring, and the second lead-out piece of the auxiliary stationary spring are respectively exposed outside the auxiliary support.

[0014] Furthermore, there are two auxiliary moving springs and two auxiliary stationary springs, forming two sets of auxiliary contacts. These two sets of auxiliary contacts are arranged along the width direction of the contact support and are symmetrically arranged on the same auxiliary bracket. The end of the auxiliary bracket facing the contact support forms a relief groove corresponding to the contact support, and the mating parts of the two auxiliary moving springs are respectively located in the relief groove.

[0015] Furthermore, the auxiliary contact assembly is located between the two PE leads, which are arranged along the width direction of the contact support; multiple moving contact portions and multiple stationary contact portions are provided, with the multiple moving contact portions spaced apart along the length direction of the contact support, and the multiple stationary contact portions corresponding one-to-one with the multiple moving contact portions; the multiple moving contact portions are located on both sides of the conductive element along the length direction of the contact support, and the multiple stationary contact portions are located on both sides of the auxiliary contact assembly along the length direction of the contact support.

[0016] Furthermore, the lead-out portions of the stationary contact portion, the lead-out portions of the two PE leads, and the lead-out portions of the auxiliary contact assembly are staggered relative to each other in the length direction supported by the contact.

[0017] Furthermore, the housing portion includes a base, the contact support is movably disposed within the base, and a return spring is provided between the two; the stationary contact portion, two PE leads, and auxiliary contact assembly are respectively inserted into the base. Further, it also includes a magnetic circuit portion located above the contact support, the magnetic circuit portion having a moving iron core, the moving iron core being coaxially connected to a push rod, the contact support being pushed by the push rod; the housing portion also includes an outer shell and a middle cover, the middle cover being connected to the base and covering the contact structure, the outer shell being connected to the base and / or the middle cover and enclosing a magnetic circuit cavity, the magnetic circuit portion being disposed within the magnetic circuit cavity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Since this utility model also includes two PE leads installed in the housing, and a conductive element for conducting the two PE leads is provided between the two PE leads, when the relay of this utility model is applied to the power system, only one of the PE leads needs to be connected to the PE line of the power system to achieve the grounding function, thereby greatly improving the safety of the relay application and avoiding the safety problem of accidental electric shock caused by the aging of the insulation of the relay housing and the load input terminal.

[0020] 2. Each of the two PE leads is provided with a first contact. The two ends of the conductive element are respectively provided with a second contact that is opposite to the first contact on the two PE leads. The conductive element is driven by a driving element so that the second contacts at both ends of the conductive element are closed or opened with the first contacts of the two PE leads, so that the present invention can control whether the grounding function is activated according to actual needs.

[0021] 3. As a preferred embodiment, the conductive element is mounted on the contact support, which constitutes the driving element. This allows the present invention to directly use the contact support to control the opening and closing of the grounding contact, thereby simplifying the structure and reducing costs. In particular, the opening and closing states of the main contact are opposite to those of the grounding contact, which not only makes the present invention applicable to TNC power systems but also provides effective grounding protection when the load is disconnected.

[0022] 4. This utility model also includes an auxiliary contact assembly, which has the function of indicating the working status of the main contacts. Furthermore, the auxiliary moving spring of the auxiliary contact assembly is separately arranged from the contact support, so that the auxiliary moving spring does not increase the weight of the contact support, thereby not affecting the opening and closing speed of the main contacts and ensuring that the opening and closing speed of the main contacts meets the requirements. In addition, separating the auxiliary moving spring from the contact support allows for more flexible structural design of the contact support, facilitating functional expansion design or the design of multiple sets of main contacts.

[0023] 5. The auxiliary contact assembly also includes an insulated auxiliary bracket, which allows the present invention to increase the creepage distance between the main contact and the auxiliary contact by utilizing the auxiliary bracket, and to improve the ease of installation of the auxiliary moving spring and the auxiliary stationary spring, as well as improve the stability of the cooperation between the auxiliary moving spring and the auxiliary stationary spring.

[0024] 6. Two auxiliary moving springs and two auxiliary stationary springs are provided, so that this utility model forms two sets of auxiliary contacts, which improves reliability and can be used as different control signals.

[0025] 7. The auxiliary contact assembly is located between the two PE leads. The space between the two PE leads can be used to arrange the auxiliary contact assembly reasonably, so that the overall structure is more compact and conducive to miniaturization design.

[0026] 8. The lead-out portions of the stationary contact, the lead-out portions of the two PE leads, and the lead-out portions of the auxiliary contact assembly are staggered relative to each other in the length direction supported by the contact, which can improve the creepage distance between the main contact, the auxiliary contact, and the PE leads.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the present invention is not limited to the embodiments provided. Attached Figure Description

[0028] Figure 1 This is an exploded view of the entire utility model;

[0029] Figure 2 This is a partially exploded view of the present invention;

[0030] Figure 3This is an exploded view of the auxiliary contact component of this utility model;

[0031] Figure 4 This is a three-dimensional structural schematic diagram of the auxiliary contact component of this utility model;

[0032] Figure 5 This is a front view of the contact support and auxiliary contact assembly of this utility model in the auxiliary contact closed state;

[0033] Figure 6 yes Figure 5 BB section view;

[0034] Figure 7 This is a front view of the contact support and auxiliary contact assembly of this utility model in the auxiliary contact disconnected state;

[0035] Figure 8 yes Figure 7 CC section view;

[0036] Figure 9 This is a top view of the base, main contact assembly, and auxiliary contact assembly of this utility model in an assembled state;

[0037] Figure 10 yes Figure 9 DD sectional view;

[0038] Figure 11 This is a cross-sectional view of the present invention;

[0039] Figure 12 This is a bottom view of the present invention;

[0040] In the diagram: 1. Contact support; 2. First moving contact bridge; 21. Moving contact; 3. Stationary contact; 31. Stationary contact; 32. Contact lead-out piece; 4. First spring; 5. Auxiliary moving spring; 51. Auxiliary moving contact; 52. Mating part; 53. First bending part; 54. Trigger protrusion; 55. First lead-out piece; 6. Auxiliary stationary spring; 61. Auxiliary stationary contact; 62. Second bending part; 63. Second lead-out piece; 7. Auxiliary bracket; 71. First slot; 72. Second slot; 73. Relief groove; 8. Second moving contact bridge; 81. Second contact; 9. PE lead-out end; 91. First contact; 10. Second spring; 20. Base; 201. Cavity; 30. Magnetic circuit part; 301. Moving iron core; 302. Push rod; 40. Middle cover; 50. Outer shell; 60. Return spring. Detailed Implementation

[0041] In this invention, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] Please see Figures 1-12 As shown, the present invention provides a relay with grounding function, including a housing part and two PE leads 9 installed in the housing part. The two PE leads 9 are partially led out of the housing part, and a conductive element for conducting the two PE leads 9 is provided between the portions of the two PE leads 9 located inside the housing part. The conductive element is located inside the housing part.

[0043] In a preferred embodiment, each of the two PE leads 9 is provided with a first contact 91, and each end of the conductive element is provided with a second contact 81 opposite to the first contact 91 on the two PE leads 9. The conductive element is driven by a driving element, causing the second contacts 81 at both ends to close or open with the first contacts 91 on the two PE leads 9. In this way, the present invention can control whether the grounding function is activated according to actual needs.

[0044] This utility model also includes a contact structure disposed within the housing portion. This contact structure includes a contact support 1, a movable contact portion mounted on the contact support, and a stationary contact portion corresponding to the movable contact portion. Specifically, the movable contact portion includes a first movable contact bridge, and the stationary contact portion includes two stationary contacts 3, each with a stationary contact point 31. The two ends of the first movable contact bridge 2 are respectively provided with movable contacts 21 disposed opposite to the stationary contacts 31 on the two stationary contacts 3. The contact support 1 is movably disposed within the housing portion to drive the movable contacts 21 on the first movable contact bridge 2 to close or open with the stationary contacts 31. The aforementioned conductive element is a second movable contact bridge 8 mounted on the contact support 1. Therefore, the contact support 1 constitutes the aforementioned driving element, that is, the contact support 1 drives the second movable contact bridge 8 to move, causing the second contacts 81 at both ends to close or open with the first contacts 91 of the two PE leads 9. In other embodiments, the driving component is a manually operated mechanism that can be manually operated by a person to enable or disable the grounding function. The manually operated mechanism may include an operating component mounted on the housing and an actuator that is driven by the operating component. The operating component may be, for example, a button or a knob, and the actuator may be, for example, a push rod. When the operating component is operated, it drives the actuator to move, which in turn drives the conductive component to move, causing the first contact and the second contact to close or open.

[0045] The aforementioned moving contact and stationary contact cooperate to form the main contact, and the first contact 91 and the second contact 81 cooperate to form the grounding contact. The opening and closing states of the main contact and the grounding contact are opposite; that is, when the main contact is closed, the grounding contact is open, and when the main contact is open, the grounding contact is closed. This not only makes this invention applicable to TNC power systems but also provides effective grounding protection when the load is disconnected. This is because TNC power systems are three-phase four-wire systems, sharing the ground and neutral wires. Grounding the neutral wire when the load is conducting (i.e., the main contact is conducting) will cause the upstream residual current circuit breaker to trip. When the main contact is closed, the grounding contact is open (i.e., the two PE leads 9 are not conducting). Since the circuit of the power system where the main contact is located is usually equipped with a residual current device (i.e., the upstream residual current circuit breaker), under the leakage protection of the residual current device, even if the insulation of the relay housing and the load input terminal ages, it will not cause electric shock. When the main contact is open, the grounding contact is closed. At this time, the leakage current protection device does not work. However, the incoming side of the main contact is still connected to the high voltage incoming terminal. Therefore, closing the grounding contact and grounding the housing component of this utility model can prevent leakage current injury when the insulation of the relay housing and the load incoming terminal ages.

[0046] In this embodiment, a first spring 4 is provided between the contact support 1 and the first moving contact bridge 2 (i.e., the moving contact portion). The first spring 4 is located on the side of the first moving contact bridge 2 opposite to the stationary contact 3 to provide contact overtravel and dynamic contact pressure. A second spring 10 is provided between the contact support 1 and the second moving contact bridge 8 (i.e., the conductive element). The second spring 10 is located on the side of the second moving contact bridge 8 opposite to the first contact 91 to provide contact overtravel and dynamic contact pressure.

[0047] In this embodiment, multiple first moving contact bridges 2 (i.e., moving contact portions) and multiple stationary contact portions are provided. These multiple first moving contact bridges 2 are arranged at intervals along the length direction of the contact support 1. Each stationary contact portion corresponds one-to-one with a single first moving contact bridge 2. Furthermore, the multiple first moving contact bridges 2 are located on both sides of the second moving contact bridge 8 along the length direction of the contact support 1. The length directions of the first moving contact bridges 2, the second moving contact bridge 8, and the width direction of the contact support 1 are consistent. Specifically, in this embodiment, there are four first moving contact bridges 2 and four stationary contact portions, suitable for both three-phase four-wire TNC power systems and three-phase five-wire TNS power systems.

[0048] In this embodiment, the PE lead-out end 9 is L-shaped, with one side located on one side of the second moving contact bridge 8 in the thickness direction and provided with a first contact point 91, and the other side extending to the other side of the second moving contact bridge 8 in the thickness direction, and the two PE lead-out ends 9 are arranged opposite each other.

[0049] The present invention also includes an auxiliary contact assembly, which is located on the same side of the contact support 1 as the stationary contact portion. The auxiliary contact assembly includes an auxiliary moving spring 5 with an auxiliary moving contact 51 and an auxiliary stationary spring 6 with an auxiliary stationary contact 61. The auxiliary moving spring 5 is pushed by the contact support 1 to close or open the auxiliary moving contact 51 and the auxiliary stationary contact 61.

[0050] In this embodiment, the auxiliary contact assembly further includes an insulated auxiliary bracket 7, into which the auxiliary moving spring 5 and the auxiliary stationary spring 6 are respectively installed. Specifically, the auxiliary bracket 7 has a first slot 71 and a second slot 72 on one side of the width direction of the first moving contact bridge 2. The auxiliary moving spring 5 is inserted into the first slot 71, and the auxiliary stationary spring 6 is inserted into the second slot 72. The width directions of the auxiliary moving spring 5 and the auxiliary stationary spring 6 are respectively aligned with the width direction of the first moving contact bridge 2. The auxiliary moving spring 5 has a mating part 52 that is pushed by the contact support 1. The mating part 52, the first lead-out piece 55 of the auxiliary moving spring 5, and the second lead-out piece 63 of the auxiliary stationary spring 6 are respectively exposed outside the auxiliary bracket 7. Thus, this invention can, on the one hand, increase the creepage distance between the main contact and the auxiliary contact using the auxiliary bracket 7, and on the other hand, improve the ease of installation of the auxiliary moving spring 5 and the auxiliary stationary spring 6, and improve the stability of the mating of the auxiliary moving spring 5 and the auxiliary stationary spring 6.

[0051] As a preferred embodiment, two auxiliary moving springs 5 ​​and two auxiliary stationary springs 6 are provided, so that the auxiliary contact assembly of this utility model forms two sets of auxiliary contacts. These two sets of auxiliary contacts are arranged along the length direction of the first moving contact bridge 2 and are symmetrically arranged on the same auxiliary support 7. The end of the auxiliary support 7 facing the contact support 1 forms a relief groove 73 corresponding to the contact support 1, and the mating parts 52 of the two auxiliary moving springs 5 ​​are respectively located in the relief groove 73.

[0052] In this embodiment, the auxiliary moving spring 5 is provided with a U-shaped first bend 53. The openings of the first bends 53 of the two auxiliary moving springs 5 ​​are arranged opposite to each other. One end of the first bend 53 is provided with an auxiliary moving contact 51 and extends to form a mating part 52. The other end of the first bend 53 is provided with a first lead-out piece 55. The auxiliary stationary spring 6 is provided with a U-shaped second bend 62. The openings of the second bends 62 of the two auxiliary stationary springs 6 are arranged opposite to each other. One end of the second bend 62 is provided with an auxiliary stationary contact 61. The other end of the second bend 62 is provided with a second lead-out piece 63. The first lead-out piece 55 and the second lead-out piece 63 extend away from the contact support 1, respectively.

[0053] The aforementioned auxiliary contact assembly is located between the two PE leads 9, which are arranged along the width of the contact support 1. Multiple moving contact portions (i.e., the first moving contact bridge 2) are evenly distributed on both sides of the conductive element (i.e., the second moving contact bridge 8) along the length of the contact support 1, and multiple stationary contact portions are evenly distributed on both sides of the auxiliary contact assembly along the length of the contact support 1. This arrangement centrally positions the auxiliary contact assembly and the second moving contact bridge 9, or as centrally positioned as possible, ensuring a more stable fit between the auxiliary contact assembly and the contact support 1, and between the second moving contact bridge 9 and the two PE leads 9. It prevents the auxiliary contact assembly and the second moving contact bridge 9 from failing to activate due to one end of the contact support 1 tilting upwards. Positioning the auxiliary contact assembly between the two PE leads 9 allows for a more efficient arrangement of the auxiliary contact assembly within the space between them, resulting in a more compact overall structure and facilitating miniaturization of the product design.

[0054] The lead-out portions of the stationary contact section, the lead-out portions of the two PE leads 9, and the lead-out portions of the auxiliary contact assembly are staggered along the length of the contact support 1, which can improve the creepage distance between the main contact, auxiliary contact, and PE leads. The lead-out portions of the stationary contact section refer to the parts of the stationary contact section that extend outside the housing section; the lead-out portions of the two PE leads 9 and the lead-out portions of the auxiliary contact assembly are also like this. In this embodiment, the two stationary contacts 3 each include a contact body and a contact lead-out piece 32. The contact body is provided with a stationary contact 31. The contact lead-out pieces 32 of the two stationary contacts 3 are respectively located at the opposite outer ends of the contact bodies of the two stationary contacts 3 and extend away from the contact support 1, maximizing the distance between the contact lead-out pieces 32 of the two stationary contacts 3, which helps to reduce the thermal effect between them. The contact lead-out pieces 32 of the two stationary contacts constitute the lead-out portions of the aforementioned stationary contact section. The distance between the contact lead-out discs 32 of the two stationary contacts is less than the distance between the lead-out portions of the two PE leads 9. The lead-out portion of the auxiliary contact assembly includes the lead-out portion of the auxiliary moving spring (i.e., the first lead-out piece 55) and the lead-out portion of the auxiliary stationary spring (i.e., the second lead-out piece 63). The first lead-out piece 55 and the second lead-out piece 63 are arranged along the arrangement direction of the two PE leads 9 and are located within the range covered by the contact lead-out pieces 32 of the two stationary contacts. Since the auxiliary moving spring 5 has a first bending portion 53 and the auxiliary stationary spring 6 has a second bending portion 62, the first lead-out feet 55 of the two auxiliary moving springs 5 ​​and the second lead-out feet 63 of the two auxiliary stationary springs 6 are respectively arranged inward, thereby further improving the creepage distance between the main contacts and the auxiliary contacts.

[0055] In this embodiment, the opening and closing states of the main contacts are opposite to those of the auxiliary contacts, and the auxiliary contacts are normally closed. Therefore, the auxiliary moving contact 51 is located on the side of the auxiliary stationary contact 61 away from the contact support 1, and in the initial state, the auxiliary moving contact 51 and the auxiliary stationary contact 61 are closed. Each auxiliary moving spring 5 has a trigger protrusion 54 on the side of its mating portion 52 facing the contact support 1 for contacting and engaging with the contact support 1, ensuring that the trigger point position of the contact support 1 on the auxiliary moving spring 5 is consistent each time, thereby ensuring the consistency of each action of the auxiliary moving spring 5. In other embodiments, the opening and closing states of the main contacts are the same as those of the auxiliary contacts.

[0056] The housing portion of this utility model includes a base 20, with a contact support 1 movably disposed within the base 20, and a return spring 60 disposed between the two. Each stationary contact 3, two PE leads 9, and an auxiliary contact assembly are respectively inserted into the base 20. This utility model also includes a magnetic circuit portion 30 located above the contact structure, which has a moving iron core 301. The moving iron core 301 is coaxially connected to a push rod 302, which is positioned directly opposite the middle of the contact support 1 in the length direction. The contact support 1 is pushed by the push rod 302, causing the moving contacts 21 at both ends of the first moving contact bridge 2 to close or open with the stationary contacts 31 on the two stationary contacts 3, respectively.

[0057] The base 20 is provided with a plurality of cavities 201 distributed and spaced apart from each other along the length direction of the contact support 1. The aforementioned moving contact portions and the second moving contact bridge are located in different cavities, and each stationary contact portion is located in the same cavity as its corresponding moving contact portion. The two PE leads, the auxiliary contact assembly, and the second moving contact bridge are located in the same cavity. In this way, the creepage distance between the main contacts, the auxiliary contacts, and the PE leads can be further improved.

[0058] This utility model also includes a housing 50 and a middle cover 40. The middle cover 40 is connected to the base 20 and covers the main contact assembly and the auxiliary contact assembly. The housing 50 is connected to the base 20 and / or the middle cover 40 and forms a magnetic circuit cavity, and the magnetic circuit portion 30 is disposed within the magnetic circuit cavity. Specifically, in this embodiment, the housing 50 and the middle cover 40 are connected to form a magnetic circuit cavity, and the housing 50 and the middle cover 40 are snap-fit ​​connected. Similarly, the middle cover 40 and the base 20 are also snap-fit ​​connected, but the connection method between the housing 50 and the middle cover 40, and between the middle cover 40 and the base 20, is not limited to this.

[0059] This utility model discloses a relay with grounding function. In the initial state, the moving contact 21 is open from the stationary contact 31, the first contact 91 is closed from the second contact 81, and the auxiliary moving contact 51 is closed from the auxiliary stationary contact 61. Figure 10As shown. When the coil of the magnetic circuit section 30 is energized, the magnetic circuit section 30 generates a magnetic field. The moving iron core 301 moves downward with the push rod 302, thereby pushing the contact support 1 downward. This causes each moving contact 21 to close with its corresponding stationary contact 31, and each first contact 91 to open with its corresponding second contact 81. Simultaneously, the contact support 1 pushes downward the mating part 52 of each auxiliary moving spring 5, causing the auxiliary moving contact 51 to open with the auxiliary stationary contact 61. Figure 8 As shown. When the coil of the magnetic circuit section 30 is de-energized, the magnetic field generated by the magnetic circuit section 30 disappears. Under the action of the return spring 60, the contact support 1 moves upward and resets each of the first moving contact bridge 2 and the second moving contact bridge 8, causing the moving contact 21 to disconnect from the stationary contact 31, and the first contact 91 to close with the second contact 81. This also causes the push rod 302 and the moving iron core 301 to reset upward. The mating part 52 of each auxiliary moving spring 5 is released, and the auxiliary moving spring 5 resets by its own reaction force, causing the auxiliary moving contact 51 and the auxiliary stationary contact 61 to return to the closed state.

[0060] This invention discloses a relay with grounding function. In application, connecting one of its PE leads 9 to the PE line of the power system provides effective grounding protection when the load is disconnected. Furthermore, this invention allows connecting the other PE lead 9 to the equipment casing of the client device, thus providing grounding protection for the casing. This invention is applicable to both TNC power systems (three-phase four-wire) and TNS power systems (three-phase five-wire). Additionally, this invention distributes multiple sets of main contacts evenly on both sides of the auxiliary and grounding contacts, and staggers the leads of the main, auxiliary, and grounding contacts along the length of the contact support, resulting in a more compact overall layout. This facilitates miniaturization and meets the insulation creepage requirements between the main, auxiliary, and grounding contacts, improving the operational reliability of the main, auxiliary, and grounding contacts.

[0061] The present invention relates to a relay with grounding function. The parts not covered (such as the specific structure and working principle of the magnetic circuit) are the same as or can be implemented using existing technology.

[0062] The above embodiments are only used to further illustrate a relay with grounding function of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A relay with grounding function, comprising a housing portion, characterized in that: It also includes two PE leads installed in the housing portion, and a conductive element for conducting the two PE leads is provided between the two PE leads, the conductive element being located inside the housing portion.

2. The relay with grounding function according to claim 1, characterized in that: The two PE leads are each provided with a first contact, and the two ends of the conductive element are respectively provided with a second contact opposite to the first contact on the two PE leads. The conductive element is driven by a driving element so that the second contacts at both ends of the conductive element are respectively closed or opened with the first contacts of the two PE leads.

3. The relay with grounding function according to claim 2, characterized in that: It also includes a contact structure disposed within the housing portion. The contact structure includes a contact support, a movable contact portion mounted on the contact support and having a movable contact, and a stationary contact portion disposed corresponding to the movable contact portion and having a stationary contact. The contact support is movably disposed within the housing portion to drive the movable contact to close or open with the stationary contact. The conductive element is mounted on the contact support, and the contact support constitutes the driving element.

4. The relay with grounding function according to claim 3, characterized in that: The moving contact and the stationary contact work together to form the main contact, and the first contact and the second contact work together to form the grounding contact. The opening and closing states of the main contact are opposite to those of the grounding contact.

5. The relay with grounding function according to claim 3, characterized in that: A first spring is provided between the contact support and the moving contact portion, and the first spring is located on the side of the moving contact portion opposite to the stationary contact portion; a second spring is provided between the contact support and the conductive element, and the second spring is located on the side of the conductive element opposite to the first contact.

6. The relay with grounding function according to claim 4, characterized in that: The PE lead-out terminal is L-shaped, with one side located on one side of the direction of movement of the conductive component and provided with the first contact point, and the other side extending to the other side of the direction of movement of the conductive component; the two PE lead-out terminals are arranged opposite each other on one side.

7. The relay with grounding function according to claim 3, characterized in that: The moving contact portion includes a first moving contact bridge, with the moving contact points respectively provided at both ends of the first moving contact bridge; the stationary contact portion includes two stationary contacts, with the stationary contacts respectively provided opposite to the moving contacts at both ends of the first moving contact bridge; the conductive element is a second moving contact bridge, with the second contact points respectively provided at both ends of the second moving contact bridge.

8. The relay with grounding function according to any one of claims 3-7, characterized in that: It also includes an auxiliary contact assembly located on one side of the movement direction supported by the contact. The auxiliary contact assembly includes an auxiliary moving spring with an auxiliary moving contact and an auxiliary stationary spring with an auxiliary stationary contact. The auxiliary moving spring is supported and pushed by the contact to close or open the auxiliary moving contact and the auxiliary stationary contact.

9. The relay with grounding function according to claim 8, characterized in that: The auxiliary contact assembly further includes an insulated auxiliary support, in which the auxiliary moving spring and the auxiliary stationary spring are respectively installed. The auxiliary moving spring is provided with a mating part that is supported and pushed by the contact. The mating part, the first lead-out piece of the auxiliary moving spring, and the second lead-out piece of the auxiliary stationary spring are respectively exposed outside the auxiliary support.

10. The relay with grounding function according to claim 9, characterized in that: Two auxiliary moving springs and two auxiliary stationary springs are provided to form two sets of auxiliary contacts. The two sets of auxiliary contacts are arranged along the width direction of the contact support and are symmetrically arranged on the same auxiliary bracket. The end of the auxiliary bracket facing the contact support forms a relief groove corresponding to the contact support. The mating parts of the two auxiliary moving springs are respectively located in the relief groove.

11. The relay with grounding function according to claim 8, characterized in that: The auxiliary contact assembly is located between the two PE leads, which are arranged along the width direction of the contact support. Multiple moving contact portions and multiple stationary contact portions are provided, with the multiple moving contact portions spaced apart along the length direction of the contact support. Each of the multiple stationary contact portions corresponds one-to-one with the multiple moving contact portions. The multiple moving contact portions are located on both sides of the conductive element along the length direction of the contact support, and the multiple stationary contact portions are located on both sides of the auxiliary contact assembly along the length direction of the contact support.

12. The relay with grounding function according to claim 11, characterized in that: The lead-out portions of the stationary contact, the lead-out portions of the two PE leads, and the lead-out portions of the auxiliary contact assembly are staggered relative to each other along the length direction supported by the contact.

13. The relay with grounding function according to claim 8, characterized in that: The housing includes a base, the contact is movably disposed within the base, and a return spring is provided between the two; the stationary contact portion, two PE leads, and the auxiliary contact assembly are respectively inserted into the base.

14. The relay with grounding function according to claim 13, characterized in that: It also includes a magnetic circuit portion located above the contact support, the magnetic circuit portion having a moving iron core, the moving iron core being coaxially connected to a push rod, the contact support being pushed by the push rod; the housing portion also includes an outer shell and a middle cover, the middle cover being connected to the base and covering the contact structure, the outer shell being connected to the base and / or the middle cover and enclosing a magnetic circuit cavity, the magnetic circuit portion being disposed within the magnetic circuit cavity.

Images