Contactor and electric device

Abstract

The utility model provides a contactor and an electric device, the contactor of the utility model comprises a housing; the first joint is hinged in the shell, and a free end of the first joint is provided with a plurality of first contacts; the second joint is hinged in the shell, and the free end of the second joint is provided with a second contact which is arranged in pairs with the first contact; when the first connector and the second connector rotate, the pair of the first contact and the second contact with the smallest distance can be contacted or separated, and the distance between each pair of the first contact and the second contact is changed due to rotation of the first connector and the second connector corresponding to connection and disconnection of a circuit where the contactor is located. According to the contactor provided by the utility model, after a pair of the first contact and the second contact is adhered, the first joint and the second joint can be rotated to switch the contacts, and the first contact and the second contact of the next group are used, so that the normal work of a circuit can be maintained without replacing a new contactor, and the durability of the contactor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, and particularly relates to a contactor. The utility model also relates to an electrical device having the above contactor. Background Art

[0002] A contactor is a widely used switching electrical appliance. Using electromagnetic, pneumatic or hydraulic principles, it has two contacts. The user controls the contact and separation of the two contacts to achieve the on-off of the contacts, and then completes the on-off control of the main circuit. The contactor has the advantages of strong current-breaking ability, rapid action, safe operation, frequent operation and remote control. Its main control object is the motor, and it can also be used to control other electrical loads, such as electric welders, electric furnaces, etc.

[0003] During the daily use of the contactor, the situation of contact sticking will inevitably occur. The inducing factors include current overload, unstable power supply voltage, contact material, contact contamination, etc. When the contactor switches the circuit, an arc will be generated between the contacts. The arc is a plasma generated by the current passing through high-temperature and high-pressure air, and has strong heat energy and chemical activity, which can melt the metal contacts, resulting in the mutual melting and welding of the contacts together, and the contactor fails. After the contact sticking occurs in the contactor, the entire contactor must be scrapped, and the durability is poor. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a contactor to improve the durability of the contactor.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A contactor includes:

[0007] A housing;

[0008] A first joint, hinged inside the housing, and a plurality of first contacts are provided at the free end;

[0009] A second joint, hinged inside the housing, and a second contact paired with the first contact is provided at the free end;

[0010] When the first joint and the second joint rotate, the pair of the first contact and the second contact with the smallest distance can be in contact or separated, corresponding to the conduction and disconnection of the circuit where the contactor is located, and the distance between each pair of the first contact and the second contact changes due to the rotation of the first joint and the second joint.

[0011] Further, the contactor includes:

[0012] The first adjusting part is arranged on the housing and can act on the first joint and the second joint to rotate towards the direction of the first adjusting part;

[0013] The second adjusting part is arranged on the housing and can act on the first joint and the second joint to rotate away from the direction of the first adjusting part;

[0014] The first adjusting part and the second adjusting part jointly act on the first joint and the second joint to maintain the conduction state of the first joint and the second joint in contact with each other.

[0015] Furthermore, the first adjusting part is an electromagnet, and the electromagnet forms a magnetic attraction fit with both the first joint and the second joint. The rotation angles of the first joint and the second joint change due to the change in the magnetic force of the electromagnet.

[0016] Furthermore, the second adjusting part is an elastic member, and one is respectively connected between the housing and the first joint and between the housing and the second joint;

[0017] The elastic member is in a stretched state to constitute the force balance of the first joint and the second joint.

[0018] Furthermore, the elastic member is a tension spring.

[0019] Furthermore, a limiting member is arranged on the housing. When the limiting member abuts against the first joint, it can limit the maximum rotatable angle of the first joint away from the first adjusting part.

[0020] Furthermore, the limiting member is movably arranged on the housing and can adjust the maximum rotatable angle of the first joint away from the first adjusting part.

[0021] Furthermore, the limiting member is a bolt, and the bolt is threadedly connected through the housing, and the threaded end abuts against the first joint.

[0022] Furthermore, both the first joint and the second joint have cylindrical side walls coaxial with their own rotation axes;

[0023] A semi-cylindrical groove-shaped first contact is formed by concave in the cylindrical side wall of the first joint, and a semi-cylindrical convex-shaped second contact is formed by convex in the cylindrical side wall of the second joint. The first joint meshes with the second joint.

[0024] Compared with the prior art, the present utility model has the following advantages:

[0025] For the contactor described in the present utility model, a rotatable first connector and a second connector are provided, and a first contact is provided on the first connector, and a second contact paired with the first contact is provided on the second connector. By rotating the first connector and the second connector, the disengagement and separation of the first contact and the second contact can be achieved, and the conduction and disconnection of the circuit connected by the contactor can be realized. After adhesion occurs between a pair of first and second contacts, the first connector and the second connector can be rotated to switch the contacts, and the next set of first and second contacts can be used, so that the normal operation of the circuit can be maintained without replacing a new contactor, improving the durability of the contactor.

[0026] The first adjusting part and the second adjusting part are provided to control the rotation of the first connector or the second connector from two directions of the first connector or the second connector, so that the first connector and the second connector use the predetermined first contact and second contact to conduct and disconnect the circuit.

[0027] The first adjusting part is set as an electromagnet. By changing the current of the electromagnet, the magnetic force of the electromagnet can be controlled, so that the magnetic suction force received by the first connector and the second connector changes, and then the rotation angle of the first connector and the second connector can be adjusted.

[0028] An elastic member is used as the second adjusting part. When the magnetic force of the electromagnet changes, the elastic member can rely on its own elastic properties to balance the magnetic forces received by the first connector and the second connector, and jointly with the electromagnet, limit the first connector and the second connector at the required positions to maintain the conduction of the contacts.

[0029] The elastic member is set as a tension spring. The tension spring has good elastic recovery ability and strong tensile property, which is beneficial to the control of the first connector and the second connector.

[0030] After at least one contact of the first connector close to the electromagnet fails, by providing a limiting member, after the electromagnet is powered off, the first connector will rotate and abut against the limiting member under the action of the elastic member, so that the failed contact will not rotate to a position where it can be contacted, ensuring the normal operation of the contactor.

[0031] By setting the limiting member in a movable form, the limiting member can abut against the first connector at different positions, changing the maximum rotatable angle of the first connector to adapt to the use of different pairs of first and second contacts; secondly, the first connector can also be pushed by moving the limiting member to separate the adhered first contact and second contact.

[0032] A bolt is used as the limiting member, and by screwing the bolt, the position of the bolt on the housing can be changed, which is convenient to operate.

[0033] The first connector is provided with a first contact that is cylindrically concave, and the second connector is provided with a second contact that is cylindrically convex, enabling an engagement relationship between the first connector and the second connector, such that when the first connector rotates, it can drive the second connector to move, or when the second connector rotates, it can drive the first synchronous connector to move, achieving the correspondence of each pair of the first contacts and the second contacts.

[0034] Another object of the present invention is to provide an electrical device equipped with the contactor as described above.

[0035] The electrical device described in the present invention has the same beneficial effects as the contactor described above compared to the prior art, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 is a schematic structural diagram of the contactor according to Embodiment 1 of the present invention;

[0038] Figure 2 is a schematic structural diagram of the contactor according to Embodiment 1 of the present invention when the contacts are disconnected;

[0039] Figure 3 is a schematic structural diagram of the contactor according to Embodiment 1 of the present invention when another pair of contacts are conducting.

[0040] DESCRIPTION OF THE REFERENCE NUMERALS:

[0041] 1. Housing;

[0042] 2. First connector;

[0043] 201. First contact; 202. First rotating shaft;

[0044] 3. Second connector;

[0045] 301. Second contact; 302. Second rotating shaft;

[0046] 4. First adjusting part;

[0047] 5. Second adjusting part;

[0048] 6. Limiting part;

[0049] 601. Threaded end; 602. Nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0051] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0053] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0054] Embodiment 1

[0055] This embodiment relates to a contactor to improve the durability of the contactor.

[0056] In terms of the overall structure, a contactor in this embodiment includes a housing, a first connector, and a second connector. The first connector is hinged inside the housing, and a plurality of first contacts are provided at the free end. The second connector is hinged inside the housing, and second contacts paired with the first contacts are provided at the free end. When the first connector and the second connector rotate, the pair of first contacts and second contacts with the smallest distance can be in contact or separated, corresponding to the conduction and disconnection of the circuit where the contactor is located, and the distances between each pair of first contacts and second contacts change due to the rotation of the first connector and the second connector.

[0057] With the above settings, for the contactor of this embodiment, through the rotatable first connector and second connector, and by providing a first contact on the first connector and a second contact paired with the first contact on the second connector, rotating the first connector and the second connector can achieve the disengagement and separation of the first contact and the second contact, realizing the conduction and disconnection of the circuit connected by the contactor. After adhesion occurs between a pair of first and second contacts, the first connector and the second connector can be rotated to switch the contacts and use the next pair of first and second contacts, enabling the circuit to keep working properly without replacing a new contactor, thus improving the durability of the contactor.

[0058] Based on the above overall introduction, specifically, referring to Figures 1 to 3 As shown, the housing 1 serves as the overall mounting base of the contactor, which is in the shape of a rectangular box with an open top covered by an upper cover to ensure internal sealing and to allow the user to remove the upper cover for maintenance inside the contactor when needed. The housing 1 is insulated both inside and outside and can be made of insulating material to ensure its safe use. In this embodiment, the contactor is provided with five sets of contacts, corresponding to five pairs of first contacts 201 and second contacts 301 respectively. Each time a pair of contacts is used, and when a pair fails, the next pair of connectors is used in sequence.

[0059] Regarding the specific structures of the first connector 2 and the second connector 3, in this embodiment, both the first connector 2 and the second connector 3 have cylindrical side walls coaxial with their respective rotation axes. The cylindrical side wall of the first connector 2 is recessed to form a semi-cylindrical groove-shaped first contact 201, and the cylindrical side wall of the second connector 3 protrudes to form a semi-cylindrical protrusion-shaped second contact 301. The first connector 2 meshes with the second connector 3. The first connector 2 and the second connector 3 adopt a fan-shaped columnar structure, which can form a structure similar to a gear, and through the first contact 201 and the second contact 301, the meshing of the first connector 2 and the second connector 3 is realized. When the first connector 2 rotates, it can drive the second connector 3 to rotate, and vice versa. When the second connector 3 rotates, it can also drive the first connector 2 to rotate, which can improve the contact conduction effect between the first contact 201 and the second contact 301. Of course, the first connector 2 and the second connector 3 can also adopt other structural forms, as long as it is satisfied that different sets of contacts can be switched when the first connector 2 and the second connector 3 rotate.

[0060] Specifically, the first connector 2 is provided with a first rotating shaft 202 for rotatably connecting with the housing 1, and the second connector 3 is provided with a second rotating shaft 302 for rotatably connecting with the housing 1. The first connector 2 is connected to the negative pole of the circuit power supply and is the female head. The second connector 3 is connected to the positive pole of the circuit power supply and is the male head. The cylindrical side walls of the first connector 2 and the second connector 3 do not contact each other to prevent short circuits or electric arcs from occurring between the cylindrical side walls of the first connector 2 and the second connector 3, which may affect the normal use of the contactor.

[0061] In order to achieve the control of the first connector 2 and the second connector 3, the contactor further includes a first adjusting portion 4 and a second adjusting portion 5. The first adjusting portion 4 is disposed on the housing 1 and can act on the first connector 2 and the second connector 3 to rotate in the direction of the first adjusting portion 4. The second adjusting portion 5 is disposed on the housing 1 and can act on the first connector 2 and the second connector 3 to rotate in a direction away from the first adjusting portion 4. The first adjusting portion 4 and the second adjusting portion 5 jointly act on the first connector 2 and the second connector 3 to maintain the conduction state of the first connector 2 and the second connector 3 in contact. The setting of the first adjusting portion 4 and the second adjusting portion 5 can perform rotational control on the first connector 2 or the second connector 3 from two directions of the first connector 2 or the second connector 3, so that the first connector 2 and the second connector 3 use the predetermined first contact 201 and the second contact 301 to conduct and disconnect the circuit.

[0062] Specifically, in order to enable the first adjusting portion 4 to better adjust and control the first connector 2 and the second connector 3, the first adjusting portion 4 is an electromagnet, and the electromagnet forms a magnetic attraction fit with both the first connector 2 and the second connector 3. The rotation angles of the first connector 2 and the second connector 3 change due to the change in the magnetic force of the electromagnet. The first adjusting portion 4 is set as an electromagnet, and the first connector 2 and the second connector 3 are made of ferromagnetic metal. By changing the current of the electromagnet, the magnetic force of the electromagnet can be controlled, so that the magnetic attraction forces received by the first connector 2 and the second connector 3 change, and then the rotation angles of the first connector 2 and the second connector 3 are adjusted to realize the switching use of different pairs of the first contact 201 and the second contact 301. When the electromagnet is powered off, the magnetic force disappears, and the first connector 2 or the second connector 3 can rotate away from the electromagnet under the action of the second adjusting portion 5, separating the first contact 201 and the second contact 301 to achieve the disconnection of the circuit.

[0063] In this embodiment, the electromagnet is disposed at the inner bottom of the housing 1 with one magnetic pole facing upward. The first connector 2 and the second connector 3 are respectively disposed on both sides of the electromagnet, and the meshing position of the free ends of the first connector 2 and the second connector 3 is directly above the magnetic pole, so that the electromagnet can attract the first connector 2 and the second connector 3 more evenly.

[0064] In order to adapt to the magnetic force action of the electromagnet, the second adjusting portion 5 needs to balance the forces on the first connector 2 and the second connector 3 to maintain the conduction state of the contacts. The second adjusting portion 5 is an elastic member, and one is connected between the housing 1 and the first connector 2 and between the housing 1 and the second connector 3 respectively. The elastic member is in a stretched state to constitute the force balance of the first connector 2 and the second connector 3. In this embodiment, the elastic members are connected between the inner side wall of the housing 1 and the first connector 2, and between the inner side wall of the housing 1 and the second connector 3, and the two elastic members are symmetrically arranged.

[0065] It should be noted that the positions of the first adjusting part 4 and the second adjusting part 5 in the housing 1 can also be in other ways, as long as the first adjusting part 4 can control the rotation of the first joint 2 and the second joint 3 simultaneously, and the second adjusting part 5 can act in the opposite direction on the first joint 2 and the second joint 3, the first joint 2 can maintain contact with the second joint 3. Also, because there will be an electro-suction effect when the first contact 201 is connected to the second contact 301 during contact conduction, the force generated by the electro-suction effect can also assist in keeping the first contact 201 and the second contact 301 in contact with each other.

[0066] Regarding the specific structure of the second adjusting part 5, in this embodiment, the second adjusting part 5 is a tension spring. There are two tension springs, which are respectively connected to the first joint 2 and the second joint 3. One end of the tension spring is connected to the inner wall of the housing 1, and the other end is connected to the first joint 2 or the second joint 3, and it is always in a tensioned state. Taking the first joint 2 as an example, when the first joint 2 rotates towards the electromagnet under the action of the electromagnet, the tension spring is gradually stretched, and its tension also gradually increases until the stretching amount of the tension spring gradually stabilizes, the force on the first joint 2 is balanced, and it conducts with the second joint 3.

[0067] As a rotation limit for the first joint 2, a limiting member 6 is provided on the housing 1. When the limiting member 6 abuts against the first joint 2, it can limit the maximum rotatable angle of the first joint 2 away from the first adjusting part 4. After a part of the first contact 201 near the electromagnet of the first joint 2 fails, by setting the limiting member 6, after the electromagnet is powered off, the first joint 2 will rotate and abut against the limiting member 6 under the action of the elastic member, so that the failed first contact 201 will not rotate to a position that is too low, and the failed first contact 201 and the second contact 301 will not come into contact, ensuring the normal operation of the contactor. In this embodiment, there are two limiting members 6, which are symmetrically arranged on the housing 1 and respectively act on the first joint 2 and the second joint 3.

[0068] For the convenience of adjusting the limiting member 6, the limiting member 6 is movably arranged on the housing 1 and can adjust the maximum rotatable angle of the first joint 2 away from the first adjusting part 4. By setting the limiting member 6 in a movable form, the limiting member 6 can abut against the first joint 2 at different positions, changing the maximum rotatable angle of the first joint 2 to adapt to different pairs of the first contact 201 and the second contact 301 for use. Secondly, when it is necessary to separate the adhered first contact 201 and the second contact 301, the limiting member 6 can be moved to push the first joint 2 to separate the adhered first contact 201 and the second contact 301.

[0069] It should be noted that, in addition to setting the limiting member 6 in a movable form, the limiting member 6 can also be set in a detachable form. When using different pairs of the first contact 201 and the second contact 301, limiting members 6 of different specifications are installed so that the first connector 2 and the second connector 3 can be restricted to the required positions.

[0070] Specifically, the limiting member 6 in this embodiment is a bolt. The bolt is threadedly connected and penetrates through the housing 1, and the threaded end 601 abuts against the first connector 2. The threaded end 601 of the bolt penetrates through the side wall of the housing 1 from the outside of the housing 1 inward, and the nut 602 is located outside the housing 1, which is convenient for the operator to screw the bolt from the outside to control the length of the bolt entering the housing 1, thereby changing the maximum rotatable angle of the first connector 2 or the second connector 3. Secondly, when screwing the bolt, a relatively small force can be used to rotate the bolt, so as to obtain a relatively large axial thrust of the bolt. When the first contact 201 and the second contact 301 are adhered, it is easier to separate the two by screwing the bolt. The bolt is insulated, and an insulating layer can be coated on the surface of the metal bolt or an insulating material bolt can be used so that the bolt will not conduct electricity with the first connector 2 or the second connector 3, without affecting the use of the contactor. The connection between the bolt and the housing 1 is sealed to improve the sealing performance of the housing 1.

[0071] In this embodiment, the using order of the first contact 201 and the second contact 301 is from bottom to top. Refer to Figure 1 and Figure 2 As shown, the working principle of the contactor is as follows: when the electromagnet is energized, it attracts the first connector 2 and the second connector 3 to rotate, and at the same time stretches the tension spring. Until the first connector 2 and the second connector 3 are in force balance, the pair of the first contact 201 and the second contact 301 at the bottommost contact and conduct the contact point, and the circuit is closed; when the electromagnet is powered off, the first connector 2 and the second connector 3 will rotate under the action of the tension spring until they abut against the bolt, so that the first contact 201 and the second contact 301 are separated and disconnected.

[0072] When the first contact 201 and the second contact 301 are adhered, screw the bolt to make the bolt move into the housing 1, and the bolt can push the first connector 2 or the second connector 3 to rotate, so that the adhered first contact 201 and the second contact 301 are disconnected. By correspondingly adjusting the screwing length of the bolt and the current intensity of the electromagnet, the adjacent lower pair of the first contact 201 and the second contact 301 can be enabled.

[0073] Embodiment 2

[0074] This embodiment relates to an electrical device equipped with the contactor in Embodiment 1.

[0075] By using the contactor in the first embodiment, when the contacts of the electrical device in this embodiment are stuck, the adhesion can be released by screwing the bolt, and the bolt is used to control the use of different contact positions, avoiding the first contact and the second contact damaged due to adhesion, improving the durability of the electrical device, and further enhancing the use quality of the electrical device.

[0076] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A contactor, characterized in that, Comprising: A housing; A first connector, hinged within the housing, and having a plurality of first contacts at its free end; A second connector, hinged within the housing, and having second contacts arranged in pairs with the first contacts at its free end; When the first connector and the second connector rotate, the pair of first and second contacts with the smallest distance can come into contact or separate, corresponding to the conduction and disconnection of the circuit where the contactor is located; the distances between each pair of first and second contacts change due to the rotation of the first connector and the second connector.

2. The contactor according to claim 1, characterized in that, The contactor includes: A first adjusting part, arranged on the housing, capable of acting on the first connector and the second connector to rotate towards the direction of the first adjusting part; A second adjusting part, arranged on the housing, capable of acting on the first connector and the second connector to rotate away from the direction of the first adjusting part; The first adjusting part and the second adjusting part jointly act on the first connector and the second connector to maintain the conduction state of the first connector and the second connector in contact.

3. The contactor according to claim 2, wherein: The first adjusting part is an electromagnet, which forms a magnetic attraction fit with both the first connector and the second connector, and the rotation angles of the first connector and the second connector change due to the change in the magnetic force of the electromagnet.

4. The contactor according to claim 3, wherein: The second adjusting part is an elastic member, and one is connected between the housing and the first connector and between the housing and the second connector respectively; The elastic member is in a stretched state to constitute the force balance of the first connector and the second connector.

5. The contactor according to claim 4, wherein: The elastic member is a tension spring.

6. The contactor according to claim 4, wherein: A limiting member is arranged on the housing, and when the limiting member abuts against the first connector, it can limit the maximum rotatable angle of the first connector away from the first adjusting part.

7. The contactor according to claim 6, wherein: The limiting member is movably arranged on the housing and can adjust the maximum rotatable angle of the first connector away from the first adjusting part.

8. The contactor according to claim 7, wherein: The limiting member is a bolt, the bolt is threadedly connected and penetrates through the housing, and the threaded end abuts against the first connector.

9. The contactor according to any one of claims 1 to 8, wherein: Both the first connector and the second connector have cylindrical side walls coaxial with their respective rotation axes; A semi-cylindrical groove-shaped first contact is formed by concave in the cylindrical side wall of the first connector, and a semi-cylindrical convex-shaped second contact is formed by convex in the cylindrical side wall of the second connector, and the first connector meshes with the second connector.

10. An electrical device, wherein: The electrical device is equipped with the contactor according to any one of claims 1 to 9.

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