Contact assembly and load switch

Abstract

The utility model provides a contact assembly and a load switch, and relates to the technical field of electrical equipment. The contact assembly comprises a shell, an iron block, a static contact, a moving contact, a magnetism increasing piece and a rotating shaft. The static contact and the rotating shaft are arranged in the shell; the moving contact is rotatably arranged on the rotating shaft, one end of the moving contact is provided with a contact part, the other end is provided with an iron block, and the contact part and the iron block are respectively positioned on two sides of the rotating shaft; the magnetism increasing piece is arranged on the shell and located at the end, away from the contact part, of the moving contact. The magnetism increasing piece is used for enabling the contact part to have the trend of moving towards the static contact. Under the condition of short circuit, short-circuit current passes through the moving contact to enable the magnetism increasing piece to generate electromagnetic attraction on the iron block arranged on the moving contact, so that the acting force of the contact part on the static contact is further increased, and the moving contact and the static contact are prevented from being separated due to repulsive force generated between the moving contact and the static contact when abnormal conditions such as short circuit occur. Therefore, the stable contact between the moving contact and the static contact is ensured, and the operation stability and the short-circuit current resistance of the load switch are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical equipment, specifically, a contact assembly and load switch. BACKGROUND

[0002] To ensure the safe operation of the power system, an electrical device with reliable on-off, breaking and carrying normal current capacity is usually provided in the power system. The electrical device can also realize on-off, carrying and breaking current under abnormal circuit fault (such as short circuit) conditions.

[0003] The existing technology of the electric meter currently uses a built-in load switch to control the power consumption of the main line. In the existing product, the repulsive force caused by the large current passing between the moving contact and the static contact causes the two to separate, so that the electrical equipment cannot operate normally. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a contact assembly and load switch, which can ensure that the moving contact and the static contact are in close contact, and the moving contact and the static contact are in stable contact, thereby improving the operation stability and short-circuit resistance of the contact assembly.

[0005] The embodiment of the utility model is implemented as follows:

[0006] In a first aspect, the utility model provides a contact assembly, comprising:

[0007] A shell;

[0008] An iron block;

[0009] A rotating shaft, which is arranged in the shell;

[0010] A static contact, which is arranged in the shell;

[0011] A moving contact, which is rotatably arranged in the rotating shaft, one end of the moving contact is provided with a contact part for cooperating with the static contact, the contact part is located on one side of the rotating shaft, and the iron block is arranged at the other end of the moving contact and located on the other side of the rotating shaft;

[0012] A magnetic enhancer, which is arranged in the shell and located at the end of the moving contact away from the contact part, the magnetic enhancer generates an electromagnetic attraction force on the iron block in the case of a short-circuit current passing through the moving contact, so that the contact part has a tendency to move towards the static contact.

[0013] In an optional embodiment, the shell is provided with a mounting part, and the magnetic enhancer is fixedly mounted on the mounting part.

[0014] In an optional embodiment, the magnetic enhancer comprises a first structure part and two second structure parts, and the movable contact is located between the two second structure parts.

[0015] In an optional embodiment, the movable contact is provided with a mounting groove located at one end away from the contact part, and the iron block is mounted in the mounting groove.

[0016] In an optional embodiment, the mounting groove is arranged at one side of the movable contact away from the first structure part of the magnetic enhancer, and in the state that the iron block is mounted to the movable contact, the top surface of the iron block is lower than or flush with the top surface of the movable contact.

[0017] In an optional embodiment, the contact assembly further comprises a mounting seat, the rotating shaft is arranged in the housing, the mounting seat and the movable contact are rotatably arranged on the rotating shaft, and the mounting seat is used to drive the movable contact to rotate under the driving of the driving force.

[0018] In an optional embodiment, the contact assembly further comprises an elastic member arranged between the mounting seat and the movable contact, and in the state that the elastic member is extruded, the elastic member makes the contact part have a tendency to move towards the stationary contact.

[0019] In an optional embodiment, the contact assembly further comprises a connecting wire and a wiring member, the wiring member is arranged in the housing, one end of the connecting wire is connected with the wiring member, the other end is connected with the movable contact, the iron block is located between the movable contact and the connecting position of the wire and the rotating shaft, and the connecting wire has a bending structure.

[0020] In an optional embodiment, the stationary contact and the first structure part of the magnetic enhancer are respectively located at two sides of the movable contact, and the stationary contact and the magnetic enhancer are respectively located at two sides of the rotating shaft.

[0021] In a second aspect, the utility model provides a load switch which comprises the contact assembly as any of the preceding embodiments.

[0022] The contact assembly and the load switch provided by the utility model embodiment have the following beneficial effects: in the closed state of the movable contact and the stationary contact, especially in the case of short circuit, when the short circuit current passes through the movable contact, the magnetic enhancer generates electromagnetic attraction to attract the iron block arranged on the movable contact, and the contact part of the movable contact has a tendency to move towards the stationary contact, so that the force of the contact part on the stationary contact is increased, the repulsive force between the movable contact and the stationary contact is avoided in the case of abnormal conditions such as short circuit, and the stable contact between the movable contact and the stationary contact is ensured, and the operation stability and the short circuit current resistance of the load switch are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0024] Fig. 1 The contact assembly structure schematic view provided by the present application embodiment;

[0025] Fig. 2 The magnetic member structure schematic view provided by the present application embodiment;

[0026] Fig. 3 The contact assembly partial structure schematic view provided by the present application embodiment;

[0027] Fig. 4 The contact assembly partial structure sectional view provided by the present application embodiment.

[0028] Icon: 10 - contact assembly; 100 - shell; 110 - mounting portion; 200 - iron block; 300 - static contact; 400 - dynamic contact; 410 - contact portion; 420 - mounting groove; 500 - magnetic member; 510 - first structure portion; 520 - second structure portion; 600 - mounting seat; 700 - rotating shaft; 800 - elastic member; 900 - connecting component; 910 - connecting wire; 920 - wiring member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0031] It should be noted that: similar labels and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] To ensure the safe operation of the power system, electrical equipment with reliable switching and breaking capabilities and the ability to carry normal current is usually installed in the power system. This electrical equipment can also switch, break, and carry current under abnormal circuit fault conditions (such as short circuit).

[0036] Electrical equipment typically connects, carries, and disconnects current through the contact or separation of moving and stationary contacts. However, in certain operating scenarios, a repulsive force can occur between the moving and stationary contacts, causing them to separate and preventing the electrical equipment from operating normally.

[0037] Based on the problems existing in the current technology, please refer to Figs. 1 to 4 This utility model provides a contact assembly 10, which is applied to electrical equipment, and is particularly suitable for load switches, etc.

[0038] In detail, the contact assembly 10 includes a housing 100, an iron block 200, a stationary contact 300, a moving contact 400, a magnetizing element 500, and a rotating shaft 700.

[0039] The static contact 300 and the rotating shaft 700 are arranged in the shell 100; the dynamic contact 400 is rotatably arranged in the rotating shaft 700, one end of the dynamic contact 400 is provided with a contact part 410 for cooperating with the static contact 300, the other end is provided with the iron block 200, and the contact part 410 and the iron block 200 are respectively located on both sides of the rotating shaft 700; the magnetic increasing part 500 is arranged in the shell 100 and located at one end of the dynamic contact 400 away from the contact part 410, and the magnetic increasing part 500 is used for making the contact part 410 have a tendency to move towards the static contact 300.

[0040] In the embodiment, the dynamic contact 400 can be driven to rotate relative to the shell 100, so that the contact part 410 of the dynamic contact 400 moves close to or away from the static contact 300, so as to realize the closing or opening of the dynamic contact 400 and the static contact 300; and in the closing state of the dynamic contact 400 and the static contact 300, and in the short circuit condition, the short circuit current passing through the dynamic contact 400 can make the magnetic increasing part 500 generate an electromagnetic attraction force on the iron block 200 arranged on the dynamic contact 400, so as to further increase the force of the contact part 410 on the static contact 300 through the rotating shaft 700, so as to avoid the separation between the dynamic contact 400 and the static contact 300 due to the repulsive force generated when the abnormal condition such as short circuit occurs, so as to ensure the stable contact between the dynamic contact 400 and the static contact 300, thereby improving the operation stability and short circuit current resistance of the load switch.

[0041] It should be noted that the driving mechanism usually includes a coil assembly, an armature and a connecting rod arranged in the shell 100 in sequence, and the coil assembly can be energized to drive the armature to rotate, and the dynamic contact 400 is driven to rotate through the connecting rod, so as to realize the closing or opening of the dynamic contact 400 and the static contact 300.

[0042] Of course, in other embodiments of the utility model, the driving mechanism can also be other mechanism devices, as long as it can drive the dynamic contact 400 to close or open, which is not limited here.

[0043] Further, the shell 100 is provided with a mounting part 110, and the magnetic increasing part 500 is fixedly installed on the mounting part 110.

[0044] In the embodiment, the magnetic increasing part 500 is fixedly installed on the mounting part 110 of the shell 100, so that the dynamic contact 400 moves relative to the magnetic increasing part 500 when the dynamic contact 400 is driven to rotate relative to the shell 100, compared with the existing device, the structure is simpler, and the synchronous movement of the magnetic increasing part 500 and the dynamic contact 400 is avoided, so as to reduce the influence of the weight of the magnetic increasing part 500 on the movement of the dynamic contact 400.

[0045] Specifically, the mounting part 110 is in the form of a groove.

[0046] Further, the magnetic enhancer 500 comprises a first structure part 510 and two second structure parts 520, two ends of the first structure part 510 are connected with the two second structure parts 520 respectively, and the moving contact 400 is located between the two second structure parts 520.

[0047] In the embodiment, the two second structure parts 520 are arranged in parallel, and thus the magnetic enhancer 500 formed by the first structure part 510 and the two second structure parts 520 together has a u-shaped structure.

[0048] By locating the end of the moving contact 400 away from the contact part 410 between the two second structure parts 520, when the contact part 410 of the moving contact 400 is in contact with the static contact 300, a complete magnetic circuit can be formed, so that the magnetic enhancer 500 generates stronger magnetism, and thus the pressure of the contact part 410 of the moving contact 400 pressing the static contact 300 is also increased, thereby ensuring that the contact part 410 of the moving contact 400 is in close contact with the static contact 300.

[0049] Of course, in other embodiments of the utility model, the first structure part 510 and the two second structure parts 520 can be a split structure or can be integrally formed, which is not specifically limited here.

[0050] Further, the moving contact 400 is provided with a mounting groove 420, the mounting groove 420 is located at the end away from the contact part 410, and the iron block 200 is mounted in the mounting groove 420, and the size of the mounting groove 420 matches the size of the iron block 200.

[0051] In the embodiment, the mounting groove 420 is arranged on the moving contact 400, and the iron block 200 is mounted in the mounting groove 420, so as to improve the mounting stability of the iron block 200 on the moving contact 400.

[0052] Furthermore, in the state that the iron block 200 is mounted on the moving contact 400, the top surface of the iron block 200 is lower than or flush with the top surface of the moving contact 400, avoiding the iron block 200 from protruding relative to the moving contact 400, and ensuring the flatness of the surface of the moving contact 400, thereby facilitating the welding of the connecting wire 910 and the moving contact 400.

[0053] Further, the mounting groove 420 is arranged on the side of the moving contact 400 away from the first structure part 510 of the magnetic enhancer 500.

[0054] In the embodiment, the mounting groove 420 is arranged on the side of the moving contact 400 away from the magnetic enhancer 500, so that the iron block 200 and the magnetic enhancer 500 are located on the two sides of the moving contact 400 respectively.

[0055] Therefore, the iron block 200 can more easily drive the moving contact 400 to rotate when the magnetic member 500 generates an attractive force to attract the iron block 200. Avoiding arranging the iron block 200 and the magnetic member 500 on one side of the moving contact 400, the iron block 200 is attracted out of the mounting groove 420 when the magnetic member 500 attracts the iron block 200, so that the iron block 200 is separated from the moving contact 400.

[0056] Further, the contact assembly 10 further comprises a mounting seat 600 and a rotating shaft 700, the rotating shaft 700 is arranged in the shell 100, and the mounting seat 600 and the moving contact 400 are rotatably arranged in the rotating shaft 700, and the mounting seat 600 is used to drive the moving contact 400 to rotate under the driving of the driving force.

[0057] In the embodiment, the mounting seat 600 and the moving contact 400 are rotatably arranged, so that the mounting seat 600 can drive the moving contact 400 to rotate synchronously when the mounting seat 600 is driven by the driving assembly, so as to realize the closing or opening of the moving contact 400 and the static contact 300. Compared with the existing device, the embodiment only uses one rotating shaft 700 to realize the rotation of the mounting seat 600 and the rotating shaft 700, so that the structure is simpler, the number of parts is less, the production cost is low and the assembly is convenient.

[0058] It is worth mentioning that the contact part 410 and the mounting groove 420 are distributed on both sides of the rotating shaft 700, that is, the iron block 200 is arranged on one side of the rotating center of the moving contact 400, and the contact part 410 is arranged on the other side of the rotating center of the moving contact 400, so that the moving contact 400 is in a lever structure, which facilitates the rotation of the moving contact 400 around the rotating shaft 700 under the attraction of the magnetic member 500 and the iron block 200, thereby increasing the force of the contact part 410 of the moving contact 400 on the static contact 300.

[0059] It should be further pointed out that the static contact 300 and the first structure part 510 of the magnetic member 500 are respectively located on both sides of the width direction of the moving contact 400.

[0060] In the embodiment, the static contact 300 is located on the bottom side of the shell 100, the contact part 410 of the moving contact 400 is located above the static contact 300, and the magnetic member 500 is located above the side of the moving contact 400 away from the static contact 300, that is, the static contact 300 and the magnetic member 500 are respectively located on the upper and lower sides of the moving contact 400, and the static contact 300 and the magnetic member 500 are also located on the left and right sides of the rotating center of the moving contact 400, that is, on both sides of the rotating shaft 700. Therefore, when the magnetic member 500 attracts the iron block 200 to move upward, the contact part 410 of the moving contact 400 can be driven to move downward, so as to increase the downward pressure of the contact part 410 on the static contact 300, so that the contact part 410 and the static contact 300 are in close contact.

[0061] It can be understood that in other embodiments of the utility model, the static contact 300 can also be located above the dynamic contact 400, and the magnetic enhancer 500 can also be located below the dynamic contact 400, which can be arranged according to specific requirements, and no specific limitation is made here. Of course, in the shell 100 structure of the embodiment, the magnetic enhancer 500 is arranged above the dynamic contact 400, and the static contact 300 is arranged below the right side of the dynamic contact 400, which is a reasonable layout and can reduce the use of space or parts.

[0062] Further, the contact assembly 10 further comprises an elastic member 800, which is arranged between the mounting seat 600 and the dynamic contact 400. When the elastic member 800 is compressed, the elastic member 800 causes the contact portion 410 to have a tendency to move towards the static contact 300.

[0063] In the embodiment, the mounting seat 600 is arranged on the side of the dynamic contact 400 away from the static contact 300. Therefore, by arranging the elastic member 800 and making one end of the elastic member 800 abut against the mounting seat 600 and the other end abut against the dynamic contact 400, the mounting seat 600 not only drives the contact portion 410 of the dynamic contact 400 to contact the static contact 300, but also compresses the elastic member 800. In this way, the elastic restoring force generated by the elastic member 800 acts on the dynamic contact 400, further increasing the pressure between the contact portion 410 of the dynamic contact 400 and the static contact 300, so as to ensure that the pressure is greater than the repulsive force generated between the dynamic contact 400 and the static contact 300 in a specific situation (such as short circuit), avoiding the dynamic contact 400 from separating from the static contact 300, thereby improving the use stability of the contact assembly 10 and improving the short circuit resistance of the contact assembly 10.

[0064] Optionally, the number of dynamic contacts 400 is multiple, and therefore the number of iron blocks 200, elastic members 800 and connecting wires 910 is also multiple. Each dynamic contact 400 is provided with an iron block 200 and an elastic member 800, and is connected with a connecting wire 910.

[0065] Further, the contact assembly 10 further comprises a connecting component 900, which comprises a connecting wire 910 and a wiring member 920. The wiring member 920 is arranged in the shell 100. One end of the connecting wire 910 is connected with the wiring member 920, and the other end is connected with the dynamic contact 400. The iron block 200 is located between the connecting position of the dynamic contact 400 and the connecting wire 910 and the rotating shaft 700. The connecting wire 910 has a bent structure.

[0066] In the embodiment, the connecting wire 910, the moving contact 400 and the static contact 300 are sequentially connected to form a main circuit, and the connecting wire 910 can be directly connected to the moving contact 400, connected to the iron block 200, or connected to both the moving contact 400 and the iron block 200.

[0067] By arranging the connecting wire 910 in the bent structure, the connecting wire 910 has a certain activity allowance between the connecting piece 920 and the moving contact 400 when the moving contact 400 rotates, so that part of the connecting wire 910 can move with the moving contact 400, avoiding that the length of the connecting wire 910 is too short to limit the movement of the moving contact 400.

[0068] In summary, the utility model provides a kind of contact assembly 10, and moving contact 400 can be rotated relative to shell 100 under the driving action of driving mechanism, so that the contact part 410 of moving contact 400 moves close to or away from static contact 300, to realize the closing or opening of moving contact 400 and static contact 300;And in the closing state of moving contact 400 and static contact 300, since loop is formed in moving contact 400, static contact 300 and outside and magnetic field is generated, so that magnetic member 500 generates magnetic force and attracts iron block 200, in this case, the force of contact part 410 on static contact 300 is further increased, to avoid repulsive force between moving contact 400 and static contact 300 when short circuit and other abnormal conditions occur to separate, to ensure that moving contact 400 and static contact 300 are stably contacted, so as to improve the operating stability and short circuit resistance of load switch.

[0069] Further, the utility model embodiment also provides a kind of load switch, and the load switch includes the contact assembly 10 in the above-mentioned embodiment, of course, the load switch also includes coil assembly, armature piece and transmission connecting rod etc.

[0070] In the embodiment, coil assembly, armature piece and transmission connecting rod are sequentially connected with mounting seat 600, by energizing coil assembly, armature piece can be driven to rotate, and transmission connecting rod is moved by armature piece, finally, mounting seat 600 is rotated by transmission connecting rod, therefore, moving contact 400 is rotated under the driving of mounting seat 600 and realizes the closing or opening with static contact 300.

[0071] The above only describes preferred embodiments of the utility model and is not intended to limit the utility model. Those skilled in the art can make various changes and modifications to the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A contact assembly, characterized by, The application relates to a contact assembly. The contact assembly comprises: a shell (100); an iron block (200); a rotating shaft (700) arranged in the shell (100); a static contact (300) arranged in the shell (100); a dynamic contact (400) rotatably arranged in the rotating shaft (700), one end of the dynamic contact (400) is provided with a contact part (410) for cooperating with the static contact (300), the contact part (410) is located on one side of the rotating shaft (700), the iron block (200) is arranged at the other end of the dynamic contact (400), and the iron block (200) is located on the other side of the rotating shaft (700); 2. The contact assembly of claim 1, wherein, a magnetic increasing part (500) arranged in the shell (100) and located at the end of the dynamic contact (400) away from the contact part (410), the magnetic increasing part (500) generates an electromagnetic attraction force on the iron block (200) in the case that a short-circuit current passes through the dynamic contact (400), so that the contact part (410) has a tendency to move towards the static contact (300).

3. The contact assembly of claim 1, wherein, The shell (100) is provided with a mounting part (110), and the magnetic increasing part (500) is fixedly mounted on the mounting part (110).

4. The contact assembly of claim 1, wherein, The magnetic increasing part (500) comprises a first structure part (510) and two second structure parts (520), and the dynamic contact (400) is located between the two second structure parts (520).

5. The contact assembly of claim 4, wherein, The dynamic contact (400) is provided with a mounting groove (420) located at the end away from the contact part (410), and the iron block (200) is mounted in the mounting groove (420).

6. The contact assembly of claim 1, wherein, The mounting groove (420) is arranged on the side of the dynamic contact (400) away from the first structure part (510) of the magnetic increasing part (500), and in the state that the iron block (200) is mounted on the dynamic contact (400), the top surface of the iron block (200) is lower than or flush with the top surface of the dynamic contact (400).

7. The contact assembly of claim 6, wherein, The contact assembly further comprises a mounting seat (600), the rotating shaft (700) is arranged in the shell (100), the mounting seat (600) and the dynamic contact (400) are rotatably arranged in the rotating shaft (700), and the mounting seat (600) is used for driving the dynamic contact (400) to rotate under the driving of a driving force. The contact assembly further comprises an elastic member (800) arranged between the mounting seat (600) and the dynamic contact (400), and in the state that the elastic member (800) is extruded, the elastic member (800) makes the contact part (410) have a tendency to move towards the static contact (300).

8. The contact assembly of claim 1, wherein, The contact assembly further comprises a connecting wire (910) and a wiring member (920), the wiring member (920) is arranged in the shell (100), one end of the connecting wire (910) is connected with the wiring member (920), the other end is connected with the movable contact (400), the iron block (200) is located between the connecting position of the movable contact (400) and the connecting wire (910) and the rotating shaft (700), and the connecting wire (910) is in a bent structure.

9. The contact assembly of claim 1, wherein, The first structure part (510) of the static contact (300) and the magnetic enhancer (500) is respectively located on both sides of the movable contact (400), and the static contact (300) and the magnetic enhancer (500) are respectively located on both sides of the rotating shaft (700).

10. A load break switch characterized by A contact assembly as claimed in any of claims 1-9.

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