Alternating current contactor
By designing an AC contactor that places the incoming static contacts inside the upper cover, and using a short-circuit plate and support plate structure to achieve short-circuiting of the incoming end, the problems of complex wiring and high cost in the prior art are solved, and a simpler and lower-cost contactor design and a more efficient customer installation process are realized.
Patent Information
- Application Number
- CN202420690501.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-04-07
AI Technical Summary
When starting the star triangular wiring and auto-coupled step-down, the existing AC contactors need to use short-circuit the incoming terminal, resulting in complex wiring and high cost. The incoming terminal blocks the coil wiring terminal screws, affecting customer installation efficiency.
An alternating contactor is designed, and its inlet static contact is completely placed inside the upper cover, and a short-connecting plate and support plate structure is adopted. The support plate and the outgoing static contact are arranged correspondingly to realize short-connecting at the inlet end, without short-connecting, and simplifying the wiring process.
By setting the incoming static contacts inside the contactor housing, the use of wiring screws and short-circuit rows is avoided, the cost of parts and production complexity is reduced, and the installation convenience and production efficiency of customers are improved.
Smart Images
Figure CN222775244U_ABST
Abstract
Description
Technical Field
[0001] The utility model specifically relates to an AC contactor. Background Art
[0002] Most of the main circuits of existing AC contactors have 3 incoming terminals and 3 outgoing terminals, a total of 6 terminals. In order to increase the heating current of the contactor, some customers will use the method of parallel operation of the contactor contacts. Therefore, when performing star-delta connection and auto-coupling step-down starting, it is necessary to short-circuit the incoming terminal with a shorting bar, such as Figure 1 As shown, it is necessary to short-circuit the incoming line end at K3 through a shorting bar, which makes wiring more complicated and costly.
[0003] Moreover, for some existing AC contactors, the three wiring terminals at the incoming line end need to occupy a certain space, resulting in the wiring terminals at the incoming line end blocking the coil wiring terminal screws. When customers connect the wires, they must tilt the screwdriver to tighten and loosen the coil wiring terminal screws, which will also affect the efficiency of customers when installing the short-circuit busbar later. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an AC contactor.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] An AC contactor comprises a base, an upper cover arranged on the base, an electromagnetic system arranged in the base and a contact system arranged in the upper cover, wherein the contact system comprises:
[0007] A plurality of independently arranged outgoing static contacts, each of which is provided with a first static contact point;
[0008] An incoming static contact is arranged opposite to the outgoing static contact, the incoming static contact is completely placed inside the upper cover, and a second static contact corresponding to the first static contact is arranged on the static contact;
[0009] A plurality of moving contacts are placed between the outgoing static contacts and the incoming static contacts and can move axially to make the outgoing static contacts and the incoming static contacts conductive.
[0010] The incoming static contact comprises a short-circuit plate and a plurality of support plates with a width arranged at intervals along the axial direction of the short-circuit plate, and the support plates are respectively arranged corresponding to the outgoing static contacts, and each support plate is provided with a second static contact.
[0011] The support plate extends from one side of the short-circuit plate toward the outlet static contact and is formed through a U-shaped bend to form an end plate located above the short-circuit plate and arranged parallel to the short-circuit plate. The second static contact is placed on the end plate.
[0012] A middle cover is arranged between the base and the upper cover, and the outgoing line static contact and the incoming line static contact are respectively fixedly arranged on both sides of the middle cover.
[0013] The upper surface of the middle cover is provided with a plurality of grooves for fixing the incoming static contacts and the outgoing static contacts, and connecting grooves for placing short-circuit plates are provided between adjacent grooves.
[0014] The bottom of the side wall of the upper cover close to the incoming static contact directly contacts the middle cover, and covers the incoming static contact in the chamber formed by the upper cover and the middle cover.
[0015] A cover plate is provided on the top of the upper cover, and a chamber for accommodating the contact system is formed between the cover plate and the upper cover, and shields are provided on both sides of the cover plate respectively, and a sealed chamber is formed between the shield close to the side of the incoming static contact and the upper cover, covering the entire incoming static contact.
[0016] The protective cover is arranged in an L shape, and a plurality of heat dissipation openings are arranged on its upper end surface, and any one side thereof extends downward to form a dustproof plate.
[0017] A plurality of groups of isolation ribs are axially arranged on the inner side of the dustproof plate, and the isolation ribs are arranged corresponding to the isolation plate of the upper cover.
[0018] A screw isolation cavity is formed between the upper end of one group of isolation ribs and the upper end surface.
[0019] One end of the upper cover is provided with an avoidance cavity for avoiding the coil when wiring.
[0020] The beneficial effects of the utility model are as follows: by directly arranging the short-circuited incoming line static contact on the inner side of the contactor housing, there are no wiring screws or terminal blocks at the incoming line end of the contactor main circuit, and no short-circuiting bar is required, the production cost of parts is lower, the number of parts is less, the manufacturing is more convenient, the production efficiency is higher, and the customer's installation convenience is improved and the customer's use cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is the star-delta starting wiring diagram for the prior art.
[0022] Figure 2 This is a schematic structural diagram of Example 1 of the utility model.
[0023] Figure 3 It is a cross-sectional schematic diagram of Example 1 of the utility model.
[0024] Figure 4It is a schematic diagram of the structure of the outgoing line static contact and the incoming line static contact of Example 1.
[0025] Figure 5 This is a schematic diagram of the structure of the incoming line static contact of Example 1.
[0026] Figure 6 This is a schematic structural diagram of the middle cover of Example 1.
[0027] Figure 7 This is a schematic structural diagram of Example 2 of the present utility model.
[0028] Figure 8 It is a cross-sectional schematic diagram of Example 2 of the utility model.
[0029] Fig. 9 It is a schematic diagram of the structure of the outgoing line static contact and the incoming line static contact of Example 2.
[0030] Fig.10 This is a schematic diagram of the structure of the upper cover of Example 2.
[0031] Fig.11 This is a schematic diagram of the structure of the protective cover of Example 2. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0034] Example 1
[0035] like Figure 2-Figure 6 As shown, an AC contactor includes a base 2, an upper cover 1 arranged on the base, an electromagnetic system 7 arranged in the base, and a contact system arranged in the upper cover, wherein the contact system includes:
[0036] A plurality of independently arranged outgoing static contacts 3, each of which is provided with a first static contact point 31;
[0037] An incoming static contact 4 is arranged opposite to the outgoing static contact, the incoming static contact is completely placed inside the upper cover, and a second static contact 41 corresponding to the first static contact is arranged on the incoming static contact;
[0038] A plurality of moving contacts 6 are placed between the outgoing static contact and the incoming static contact, and are driven by the contact support to be axially movable, so that the outgoing static contact and the incoming static contact are in conduction.
[0039] The incoming static contact includes a short-circuit plate 42 and a plurality of support plates with a width arranged at intervals along the axial direction of the short-circuit plate, and the support plates are respectively arranged corresponding to the outgoing static contacts, and each support plate is provided with a second static contact.
[0040] The incoming line static contact has realized the integration of the original three incoming line static contacts into one part. There is no threaded hole processing process, the process is simpler, the cost is lower, and it is more convenient for employees to assemble. Customers no longer need to install short-circuit plates, which is more convenient and reliable.
[0041] The support plate extends from one side of the short-circuit plate toward the outgoing static contact, and is formed through a U-shaped bend 44 to form an end plate 43 located above the short-circuit plate and arranged parallel to the short-circuit plate, and the second static contact is placed on the end plate.
[0042] In this embodiment, a middle cover 5 is provided between the base and the upper cover, and the outgoing line static contact and the incoming line static contact are respectively fixedly arranged on both sides of the middle cover.
[0043] A through hole is provided in the middle of the middle cover for the contact support to pass through, and a lower chamber is formed between the middle cover and the base, in which the electromagnetic system is placed; an upper chamber is formed between the middle cover and the upper cover, in which the contact system is placed; at the same time, the contact support of the contact system is driven by the electromagnetic system to move in the axial direction to realize the opening and closing operation.
[0044] The upper surface of the middle cover is provided with a plurality of grooves 51 for fixing the incoming static contacts and the outgoing static contacts. The grooves are separated by reinforcing ribs 52, and connecting grooves 53 for placing short-circuit plates are provided between adjacent grooves. At the same time, the connecting grooves allow adjacent reinforcing ribs to be spaced to form a space for placing the short-circuit plates.
[0045] The outgoing static contact and the incoming static contact are respectively placed at the two ends of the groove and fixed by screws, and a connecting groove 53 is provided between each groove to facilitate the placement of the short-circuit plate, so that the contactor can achieve short-circuit connection of the three-phase current at the incoming end and reduce the material and processing costs of the incoming static contact.
[0046] Since the upper cover is directly connected to the base through the screw passing through the middle cover, in order to avoid the screw, an avoidance hole 45 can be provided on the short-circuit plate of the incoming static contact to play a role of avoidance.
[0047] The bottom of the side wall of the upper cover close to the incoming static contact is in direct contact with the middle cover, and the incoming static contact is covered in the chamber formed by the upper cover and the middle cover. That is, the upper cover is in direct contact with the middle cover, that is, the connection between the two forms a sealing structure, and the incoming static contact is completely covered in the chamber, which can prevent dust and other debris from entering the product and improve the protection ability of the product. Moreover, the biggest feature of this application is that the incoming terminal does not have the original wiring screws of the traditional contactor, and the outgoing terminal has 3 outgoing wiring screws, that is, the incoming static contact of this embodiment is not exposed from the upper cover, which saves the customer the need to take the additional step of short-circuiting the incoming static contact.
[0048] Example 2
[0049] like Figures 7 to 11 As shown, an AC contactor includes a base 2, an upper cover 1 arranged on the base, an electromagnetic system arranged in the base and a contact system arranged in the upper cover, wherein the contact system includes:
[0050] A plurality of independently arranged outgoing static contacts, each of which is provided with a first static contact point;
[0051] An incoming static contact is arranged opposite to the outgoing static contact, the incoming static contact is completely placed inside the upper cover, and a second static contact corresponding to the first static contact is arranged on the static contact;
[0052] A plurality of moving contacts are placed between the outgoing static contacts and the incoming static contacts, and are driven by the contact support to be axially movable, so that the outgoing static contacts are connected to the incoming static contacts.
[0053] The incoming static contact includes a short-circuit plate 42 and a plurality of support plates 46 with a width arranged at intervals along the axial direction of the short-circuit plate. The support plates are respectively arranged corresponding to the outgoing static contacts, and each support plate is provided with a second static contact.
[0054] The incoming static contact in the present application is directly composed of a short-circuit plate and a support plate extending outward along one side of the short-circuit plate, and the support plate and the short-circuit plate are on the same plane. At the same time, the support plates are arranged at intervals and correspond to the outgoing static contacts respectively. The support plate is used to support and fix the second static contact and conduct current.
[0055] In this embodiment, the upper cover is directly divided by the isolation plate 14 into a plurality of grooves for placing a group of outgoing static contacts and incoming static contacts, wherein the moving contact is supported by the contact bracket and placed between the two, and can move in the axial direction, thereby realizing the switching between opening and closing.
[0056] A cover plate 9 is provided on the top of the upper cover, and a chamber for accommodating the contact system is formed between the cover plate and the upper cover, and shields 8 are provided on both sides of the cover plate respectively, and a sealed chamber is formed between the shield close to the side of the incoming static contact and the upper cover, covering the entire incoming static contact.
[0057] The shield is L-shaped, and its upper end face 81 is provided with a plurality of heat dissipation openings. Any side thereof extends downward to form a dustproof plate 82. The shield cooperates with the upper cover to fix the incoming and outgoing line static contacts. At the same time, the shield located on one side of the incoming line static contact completely encloses the incoming line static contact, while the shield on the other side forms a gap with the upper cover for the static contact to pass through.
[0058] Since the shield completely seals the incoming static contact, the sealing performance on this side is good. In order to facilitate the outflow of hot air when the contactor is running, and to allow the high-pressure and high-temperature gas generated by the arc to escape, a number of heat dissipation ports 83 are set on its upper side, and the design of the dust plate can prevent dust and other debris from entering the product, thereby improving the product's protection capability. At the same time, its biggest feature is that it does not have the screwdriver fastening port and wire interface of the traditional contactor, that is, both sides are complete planes without wire interfaces, and the outgoing static contact passes through the gap between the lower side of the shield and the upper cover, and does not destroy the integrity of the entire dust plate.
[0059] A plurality of isolation ribs 84 are axially arranged on the inner side of the dustproof plate. The isolation ribs are arranged corresponding to the isolation plates of the upper cover. The isolation ribs cooperate with the isolation plates, that is, the isolation plates are inserted between two isolation ribs to form a slot structure, thereby improving the electrical insulation capability.
[0060] A screw isolation cavity 85 is formed between the upper end of one set of isolation ribs and the upper end surface, and is used to isolate the cover plate fastening screws.
[0061] The wire inlet end of the upper cover is provided with an avoidance cavity 12 for avoidance when the coil is connected. The avoidance cavity is arranged correspondingly at the coil connection screw, so that the coil connection screw can be installed vertically when the customer is connecting the coil, and the installation angle of the screwdriver is increased, so that the customer can use it more conveniently.
[0062] At the same time, a step structure 11 is provided at the connection screw installation position of the upper cover, so that workers can install the connection screws vertically during assembly, increasing the installation angle of the screwdriver, thereby making production more convenient.
[0063] In order to reduce costs, the isolation plate at the inlet end of the upper cover can be divided into an inlet isolation rib structure to achieve an asymmetric design at both ends. The inlet isolation rib 13 is shorter, which can save materials and make room for the coil wiring screws and connecting screws, thereby facilitating customer wiring.
[0064] In addition, since the incoming static contact is changed to one and is completely placed inside the upper cover and the protective cover, there are no wiring screws or terminal blocks at the incoming end of the contactor's main circuit, and the customer does not need to connect the incoming wires, saving costs and labor hours for customers.
[0065] The original static contact has three inlet terminals, which require three original fastening screws to fasten separately.
[0066] The line static contact only needs 2 fastening screws to fasten, which reduces costs and improves production efficiency.
[0067] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.
Claims
1. An AC contactor, comprising a base, an upper cover arranged on the base, an electromagnetic system arranged in the base, and a contact system arranged in the upper cover, characterized in that: The contact system comprises: A plurality of independently arranged outgoing static contacts, each of which is provided with a first static contact point; An incoming static contact, arranged opposite to the outgoing static contact, the incoming static contact is completely placed inside the upper cover, and a second static contact corresponding to the first static contact is provided on the incoming static contact; A plurality of moving contacts are placed between the outgoing static contacts and the incoming static contacts and can move axially to make the outgoing static contacts and the incoming static contacts conductive. The incoming static contact comprises a short-circuit plate and a plurality of support plates with a width arranged at intervals along the axial direction of the short-circuit plate, and the support plates are respectively arranged corresponding to the outgoing static contacts, and each support plate is provided with a second static contact.
2. An AC contactor according to claim 1, characterized in that: The support plate extends from one side of the short-circuit plate toward the outlet static contact and is formed through a U-shaped bend to form an end plate located above the short-circuit plate and arranged parallel to the short-circuit plate. The second static contact is placed on the end plate.
3. An AC contactor according to claim 1 or 2, characterized in that: A middle cover is arranged between the base and the upper cover, and the outgoing line static contact and the incoming line static contact are respectively fixedly arranged on both sides of the middle cover.
4. An AC contactor according to claim 3, characterized in that: The upper surface of the middle cover is provided with a plurality of grooves for fixing the incoming static contacts and the outgoing static contacts, and connecting grooves for placing short-circuit plates are provided between adjacent grooves.
5. An AC contactor according to claim 3, characterized in that: The bottom of the side wall of the upper cover close to the incoming static contact directly contacts the middle cover, and covers the incoming static contact in the chamber formed by the upper cover and the middle cover.
6. An AC contactor according to claim 1, characterized in that: A cover plate is provided on the top of the upper cover, and a chamber for accommodating the contact system is formed between the cover plate and the upper cover, and shields are provided on both sides of the cover plate respectively, and a sealed chamber is formed between the shield close to the side of the incoming static contact and the upper cover, covering the entire incoming static contact.
7. An AC contactor according to claim 6, characterized in that: The protective cover is arranged in an L shape, and a plurality of heat dissipation openings are arranged on its upper end surface, and any one side thereof extends downward to form a dustproof plate.
8. An AC contactor according to claim 7, characterized in that: A plurality of groups of isolation ribs are axially arranged on the inner side of the dustproof plate, and the isolation ribs are arranged corresponding to the isolation plate of the upper cover.
9. An AC contactor according to claim 8, characterized in that: A screw isolation cavity is formed between the upper end of one group of isolation ribs and the upper end surface.
10. An AC contactor according to claim 6, characterized in that: One end of the upper cover is provided with an avoidance cavity for avoiding the coil when wiring.