Patent Grant
12125653
This application is a National Phase Application of International Patent Application No. PCT/CN2021/083922 filed with the China National Intellectual Property Administration (CNIPA) on Mar. 30, 2021, which is based on and claims priority to and benefits of Chinese Patent Application No. 202020964230.0, filed by BYD Company Limited. on May 29, 2020 and entitled “RELAY”. The entire content of all of the above-identified applications is incorporated herein by reference.
The present disclosure relates to the technical field of electrical equipment, and more specifically to a relay.
A relay is a switching device for a high-voltage and high-power power supply. When a moving contact contacts a stationary contact, the high voltage is switched on. A housing of the relay is generally filled with arc extinguishing gas to achieve arc extinction. However, in related arts, due to the structural limitation of the relay, a backflow effect of the arc extinguishing gas is poor, and the arc extinguishing effect is poor.
The present disclosure resolves at least one of the technical problems existing in the related art. In view of this, the present disclosure provides a relay, where a sliding structure is arranged on a side of the moving contact assembly in a moving direction, which may leave the space on one side of the moving contact assembly facing the stationary contact vacant, so that arc extinguishing gas flows smoothly.
The relay according to an embodiment of the present disclosure includes: a housing, where a cavity is defined in the housing; a number of stationary contacts, where the stationary contacts are arranged on the housing at intervals, and each of the stationary contacts is at least partially arranged in the cavity; a drive shaft, where the drive shaft is movable relative to the housing in an axial direction of the drive shaft, and an axial end of the drive shaft is provided with a support piece at least partially inserted into the cavity; a moving contact assembly, where the moving contact assembly is matched with the support piece through the sliding structure, so that the moving contact assembly is movable relative to the support piece in an axial direction of the drive shaft between a first position contacting the stationary contact and a second position away from the stationary contact, and the sliding structure is arranged on a side of the moving contact assembly in a moving direction; and an elastic member, where the elastic member is arranged between the moving contact assembly and the support piece to apply an elastic force to the moving contact assembly to move toward the first position.
In the relay according to an embodiment of the present disclosure, the sliding structure is arranged on the side of the moving contact assembly in the moving direction. The elastic member is arranged between the moving contact assembly and the support piece. Thus may make the space on the side of the moving contact assembly facing the stationary contact leave vacant, so that the arc extinguishing gas flows smoothly, and at the same time, when the relay is switched on, a large contact force may be maintained between the moving contact assembly and the stationary contact.
In some embodiments of the present disclosure, the sliding structure includes a sliding slot and a sliding block. One of the support piece and the moving contact assembly defines the sliding slot and includes a first stop wall and a second stop wall respectively located at two ends of the sliding slot. The sliding slot extends in the axial direction of the drive shaft. The sliding block is arranged on the other of the support piece and the moving contact assembly. The sliding block is matched with the sliding slot and therefore slidable between the first stop wall and the second stop wall in the axial direction of the drive shaft.
In some embodiments of the present disclosure, the sliding slot is formed on the support piece. The sliding block is arranged on the moving contact assembly. When the sliding block contacts the first stop wall under an elastic force of the elastic member, the moving contact is arranged in the first position.
In some embodiments of the present disclosure, the support piece is provided with two supporting arms. The two supporting arms are arranged opposite to each other. Each of the supporting arms is respectively formed with the sliding slot thereon. The moving contact assembly is arranged between the two supporting arms. The sliding blocks are respectively arranged on two sides of the moving contact assembly facing the two supporting arms.
In some embodiments of the present disclosure, the relay further includes a first magnetic yoke. The moving contact assembly includes a moving contact and a second magnetic yoke. The first magnetic yoke is arranged on a side of the moving contact facing the stationary contact. The second magnetic yoke is arranged on a side of the moving contact facing away from the stationary contact.
In some embodiments of the present disclosure, the first magnetic yoke is arranged in the cavity and spaced apart from the stationary contact. The moving contact is mounted to the second magnetic yoke. The second magnetic yoke is matched with the support piece through the sliding structure. The elastic member is stopped between the second magnetic yoke and the support piece.
In some embodiments of the present disclosure, the support piece defines a sliding cavity opened toward the first magnetic yoke. The moving contact assembly is movably matched with the sliding cavity. An end of the first magnetic yoke facing the moving contact assembly does not extend out of an end of the stationary contact facing the moving contact assembly. A distance between the end of the first magnetic yoke facing the moving contact assembly and the end of the stationary contact facing the moving contact assembly in an axial direction of the drive shaft is L, and the L satisfies: 0≤L≤1 mm.
In some embodiments of the present disclosure, the second magnetic yoke includes a bottom plate piece and two side plate pieces. The two side plate pieces are oppositely arranged on two sides of the bottom plate piece. A mounting groove is defined between the two side plate pieces and the bottom plate piece. The moving contact is arranged in the mounting groove. The distance between the end of the first magnetic yoke facing the moving contact assembly and the end of the stationary contact facing the moving contact assembly in a length direction of the drive shaft is L, and the L satisfies: 0≤L≤1 mm.
In some embodiments of the present disclosure, the moving contact is provided with one of a matching protrusion and a matching groove, and the bottom plate piece is provided with other of the matching protrusion and the matching groove. The matching protrusion is in an interference fit with the matching groove.
In some embodiments of the present disclosure, the drive shaft further includes a shaft body piece and an insulating member. The insulating member is connected between the support piece and the shaft body piece.
In some embodiments of the present disclosure, a mounting through hole is formed on the support piece. The insulating member is matched with the mounting through hole.
A positioning member is arranged on an end of the insulating member away from the shaft body piece to position the elastic member.
A portion of the additional aspects and advantages of the present disclosure are given in the following description, and become apparent in the following description or may be learned through the practice of the present disclosure.
Relay 100;
Housing 1; cavity 11; stationary contact 12; first magnetic yoke 13;
Drive shaft 2;
Support piece 21; supporting arm 211; sliding cavity 212; mounting through hole 213;
Shaft body piece 22; insulating member 23; positioning member 231;
Moving contact assembly 3; moving contact 31; matching protrusion 311; second magnetic yoke 32; bottom plate piece 321; side plate piece 322; mounting groove 323;
Sliding structure 4; sliding slot 41; first stop wall 411; second stop wall 412; sliding block 42;
Elastic member 5;
Magnetic member 6;
Limiting member 7; limiting hole 71;
Buffer spring 8; and coil 9.
Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, where the same or similar elements or the elements having same or similar functions are denoted by the same or similar reference numerals throughout the description. The embodiments described below with reference to the accompanying drawings are exemplary to explain the present disclosure and cannot be construed as a limitation to the present disclosure.
The disclosure below provides many different embodiments or examples for implementing different structures of the present disclosure. To simplify the present disclosure, components and settings of specific examples are described below. Certainly, they are merely examples, and are not to limit the present disclosure. In addition, reference numerals and/or letters may be repeated in different examples in the present disclosure. Such repetitions are for simplification and clarity, which do not indicate relationships between the embodiments and/or settings discussed. In addition, the present disclosure provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the applicability of other processes and/or the use of other materials.
Referring to
Referring to
Referring to
Specifically, referring to
It should be noted that in the related art, a limiting component is arranged on the side of the moving contact facing the stationary contact so as to limit the movement of the moving contact to the stationary contact. The limiting component occupies the space on the side of the moving contact facing the stationary contact and blocks the arc extinguishing gas flow, which affects the arc extinguishing effect, so that a lateral arc blowing manner can only be used. However, even if the lateral arc blowing manner is used for the arc extinction, a backflow effect of the arc blowing gas is poor due to the blocking of the limiting component.
However, in the present disclosure, the sliding structure 4 is arranged on the side of the moving contact assembly 3 along the moving direction, which may leave the space on the side of the moving contact assembly 3 facing the stationary contact 12 vacant, so that the arc extinguishing gas flows smoothly.
In view of this, in the relay 100 according to an embodiment of the present disclosure, the sliding structure 4 is arranged on the side of the moving contact assembly 3 along the moving direction, and the elastic member 5 is arranged between the moving contact assembly 3 and the support piece 21, thus the space on the side of the moving contact assembly 3 facing the stationary contact 12 is vacant, so that the arc extinguishing gas flows smoothly. At the same time, when the relay 100 is switched on, overrun can be achieved, which is conducive to maintaining a large contact force between the moving contact assembly 3 and the stationary contact 12.
In some embodiments of the present disclosure, referring to
In some embodiments of the present disclosure, referring to
For example, when the sliding block 42 moves a certain distance from the first position towards the second stop wall 412, the moving contact assembly 3 reaches the second position (referring to
In some embodiments of the present disclosure, referring to
The relay 100 further includes a first magnetic yoke 13. The moving contact assembly 3 includes a moving contact 31 and a second magnetic yoke 32. The first magnetic yoke 13 and the second magnetic yoke 32 are respectively arranged on two sides of the moving contact 31. When the moving contact assembly 3 is arranged in the first position, a magnetic attraction force is generated between the first magnetic yoke 13 and the second magnetic yoke 32. Specifically, the first magnetic yoke 13 is arranged on a side of the moving contact 31 facing the stationary contact 12, and the second magnetic yoke 32 is arranged on a side of the moving contact 31 facing away from the stationary contact 12. When the moving contact assembly 3 is arranged in the first position, the moving contact 31 contacts at least two stationary contacts 12 to conduct the corresponding stationary contacts 12. The electric current flows through the moving contact 31 to generate a magnetic field around the moving contact 31. The first magnetic yoke 13 and the second magnetic yoke 32 are magnetized, and the first magnetic yoke 13 and the second magnetic yoke 32 are different in magnetism. The magnetic attraction force is generated between the first magnetic yoke 13 and the second magnetic yoke 32. The moving contact 31 is pushed by the second magnetic yoke 32 towards the stationary contact 12 to resist a repulsive force generated when the moving contact 31 contacts and communicates with the stationary contact 12. The contact pressure between the moving contact 31 and the stationary contact 12 is increased, so that the contact stability between the moving contact 31 and the stationary contact 12 is improved, and the operation stability of the relay 100 is ensured.
In some embodiments of the present disclosure, referring to
It may be understood that when the relay 100 is in the on state, the moving contact 31 is electrically communicated with the stationary contact 12. For example, referring to
In some embodiments, the housing 1 is a ceramic housing. The first magnetic yoke 13 is welded to the housing 1. A welding force between the first magnetic yoke 13 and the housing 1 is far greater than an electromagnetic force between the moving contact 31 and the stationary contact 12, so that the first magnetic yoke 13 is fixed relative to the housing 1. It may be appreciated that, compared with the related art in which the first magnetic yoke is arranged on the moving contact assembly, the weight of the moving contact assembly 3 may be reduced, the operating voltage of the relay 100 is reduced, and the operating efficiency is improved. In addition, the size of the first magnetic yoke 13 and the second magnetic yoke 32 may be greater, which further facilitates the stable contact between the moving contact 31 and the stationary contact 12 when the relay 100 is in the on state, and also facilitates the improvement of the heat dissipation capacity of the first magnetic yoke 13 and the second magnetic yoke 32.
In some embodiments of the present disclosure, referring to
Thus, when the moving contact 31 is electrically communicated with the stationary contact 12 (referring to
In some embodiments of the present disclosure, as shown in
Of course, the present disclosure is not limited thereto. The end of the moving contact 31 facing the stationary contact 12 may not be flush with the end of the side plate piece 322 facing the first magnetic yoke 13. In other words, the end of the moving contact 31 facing the stationary contact 12 may exceed out of or be lower than the end of the side plate piece 322 facing the first magnetic yoke 13, as long as the gap M between the first magnetic yoke 13 and the second magnetic yoke 32 is ensured to be between 0-1 mm when the moving contact 31 is electrically communicated with the stationary contact 12.
In an embodiment, as shown in
In some examples, as shown in
In an embodiment, as shown in
It may be understood that since zero gap may be achieved between the first magnetic yoke 13 and the second magnetic yoke 32 in the present disclosure, it may be theoretically calculated that when the electric current of 5000 A flows through the moving contact 31, the additionally increased pressure between the moving contact 31 and the stationary contact 12 may be 20 N, which can effectively resist the repulsive force between the moving contact 31 and the stationary contact 12 in a short circuit process, so that the product failure caused by the arcing of the moving contact 31 and the stationary contact 12 of the relay 100 is prevented. Meanwhile, when the rated current flows through the relay 100, the increased contact pressure may not be greater than 1 N, and the normal breaking of the relay 100 may not be affected.
In some embodiments of the present disclosure, referring to
In some embodiments of the present disclosure, referring to
In some embodiments of the present disclosure, referring to
For example, referring to
Furthermore, in some embodiments, as shown in
In an embodiment, referring to
In an embodiment, a limiting hole 71 is formed on at least one of the limiting member 7 and the magnetic member 6. The buffer spring 8 is arranged in the limiting hole 71. That is, the limiting hole 71 may be arranged on the limiting member 7. The buffer spring 8 is arranged in the limiting hole 71. The limiting hole 71 may be arranged on the magnetic member 6. The buffer spring 8 is arranged in the limiting hole 71. Thus, the fixed assembly of the buffer spring 8 is facilitated. Moreover, the deviation of the buffer spring 8 when being pressed may be prevented, thereby improving the running stability of the relay 100.
Other configurations and operations of the relay 100 according to an embodiment of the present disclosure are known to those of ordinary skilled in the art, and are not described in detail herein.
In the description of the present disclosure, it should be understood that orientation or position relationships indicated by the terms such as “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial direction”, “radial direction”, and “circumferential direction” are based on orientation or position relationships shown in the accompanying drawings, and are used only for ease and brevity of illustration and description of the present disclosure, rather than indicating or implying that the mentioned apparatus or component needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms do not construe the limitations of the present disclosure.
In addition, the terms “first” and “second” are used merely for the purpose of description, and shall not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, a feature defined by “first” or “second” can explicitly or implicitly include one or more features. In the description of the present disclosure, unless otherwise specifically limited, “a plurality of” means two or more than two.
In the present disclosure, unless otherwise explicitly specified or defined, the terms such as “mount”, “connect”, “connection”, and “fix” should be understood in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; or the connection may be a mechanical connection, an electrical connection, or a communication; or the connection may be a direct connection, an indirect connection through an intermediary, or an internal communication between two components or a mutual action relationship between two components. A person of ordinary skill in the art may understand the specific meanings of the foregoing terms in the present disclosure according to specific situations.
In the present disclosure, unless otherwise explicitly specified or defined, the first feature being located “above” or “below” the second feature may be the first feature being in a direct contact with the second feature, or the first feature being in an indirect contact with the second feature through an intermediary. In addition, that the first feature is “above”, “over”, or “on” the second feature may indicate that the first feature is directly above or obliquely above the second feature, or may merely indicate that the horizontal position of the first feature is higher than that of the second feature. That the first feature is “below”, “under”, and “beneath” the second feature may indicate that the first feature is directly below or obliquely below the second feature, or may merely indicate that the horizontal position of the first feature is lower than that of the second feature.
In the descriptions of this specification, a description of a reference term such as “an embodiment”, “some embodiments”, “an example”, “a specific example”, or “some examples” means that a specific feature, structure, material, or characteristic that is described with reference to the embodiment or the example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the foregoing terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, different embodiments or examples described in this specification, as well as features of different embodiments or examples, may be integrated and combined by a person skilled in the art without contradicting each other.
Although the embodiments of the present disclosure have been shown and described, a person of ordinary skill in the art may understand that various changes, modifications, replacements, and variations may be made to the embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is as defined by the appended claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202020964230.0 | May 2020 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/083922 | 3/30/2021 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2021/238388 | 12/2/2021 | WO | A |
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| 103038851 | Apr 2013 | CN |
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| Number | Date | Country | |
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| 20230197386 A1 | Jun 2023 | US |
