Contactor

Abstract

The present invention discloses a contactor, which includes a base and a cover body that are connected and matched. The base is provided with a receiving cavity, and a moving iron core, a static iron core, a coil, a coil skeleton, and a contact support are arranged in the receiving cavity. The coil is wound around the coil skeleton. The static iron core is provided with a plurality of support blocks, and the receiving cavity is provided with a plurality of installation grooves that are matched and installed with the support blocks for positioning. The static iron core includes a groove, the groove has a first opening and a second opening. The coil skeleton is arranged in the groove. First support portions are formed by extending from both sides of the first opening. A boss also extends upward on the bottom inner wall of the static iron core, and two notches are formed on both sides of the boss. The boss is sleeved and positioned in cooperation with the inner hole of the coil skeleton. The moving iron core and the contact support are inserted and matched, and connection members are arranged on both sides of the contact support. The present invention provides a contactor with a fast breaking speed, a simple structure, convenient assembly, and higher reliability.

Description

Technical Field

[0001] The present invention relates to a contactor. Background Art

[0002] The electromagnetic system is an important part of the contactor. Contactors in the prior art generally include components such as a base, a moving iron core, a static iron core, a coil, a coil skeleton, a contact support, etc. The coil is wound around the coil skeleton. The contact support is used for cooperating with and fixedly installing a moving contact. A static contact is provided on the base. From the perspective of the installation structure, the base includes a receiving cavity. The static iron core is fixedly installed in the receiving cavity of the base. The moving iron core and the contact support are cooperatively installed. The static iron core and the coil skeleton are cooperatively installed. The moving iron core is usually of a T-shaped structure, and its pole column is movably inserted into the inner hole of the coil skeleton. When the coil is energized, magnetism is generated, which can drive the moving iron core to move, thereby driving the static contacts to come into contact and electrical connection.

[0003] Currently, contactor electromagnetic systems in the prior art generally have problems such as low breaking speed, strong closing impact, and unreliable connections between components. During the closing process of the contactor, the moving iron core moves towards the static iron core, and at the same time, the static iron core also moves towards the moving iron core to meet it. If the static iron core is not restricted, the displacement generated by the static iron core will hit the coil skeleton. As the number of closing times increases, the static iron core is prone to shaking, and the connections between the moving iron core and the contact support, between the static iron core and the coil skeleton, and between the static iron core and the base are prone to damage under long-term severe impacts.

[0004] A Chinese invention discloses an energy-saving contactor (CN202816812U), which includes components such as a moving iron core, a static iron core, a permanent magnet, a coil, etc. The coil is arranged between the moving iron core and the static iron core. The static iron core is of a U-shaped structure, and the moving iron core is of an E-shaped structure. In the structure shown in this patent, there is a lack of a reliable positioning and installation structure between the coil and the static iron core. During the closing process, the coil and the static iron core are prone to collision and even separation, resulting in damage to the coil. In addition, the impact force during the closing process is relatively large, and the breaking speed needs to be improved. The heat dissipation effect of the coil also needs to be improved.

[0005] A Chinese invention discloses an installation structure of a magnetic yoke of an AC contactor (CN205388959U), which includes a base and a magnetic yoke (i.e., a static iron core). The magnetic yoke is installed in the base through a magnetic yoke installation member. The magnetic yoke installation member is provided with a magnetic yoke installation groove for installing the magnetic yoke, and the magnetic yoke installation member is connected and installed on the bottom surface of the base. A coil skeleton and an armature (i.e., a moving iron core) are also provided in the base. The top and bottom of the coil skeleton are respectively arranged opposite to the armature and the magnetic yoke. The magnetic yoke installation member is placed between the coil skeleton and the bottom surface of the base. The armature can move towards the magnetic yoke installed in the magnetic yoke installation groove to be magnetically attracted and connected to the magnetic yoke when the AC contactor operates.

[0006] In the above patent solution, a yoke mounting member is configured on the base, and the yoke is mounted in the base through the yoke mounting member, realizing the simple positioning and installation of the yoke base, reducing the number of parts required in the assembly process of the yoke and the base, improving the assembly efficiency of the yoke, ensuring the firmness of the positioning and assembly structure at the same time, and improving the stability of the AC contactor during the closing process. However, the setting of the yoke mounting member actually still increases the number of components, correspondingly increases the complexity of the contactor product structure and the difficulty of installation, and the shock absorption and anti-impact effects also need to be improved.

[0007] A contact support device (CN216902703U) of an AC contactor is disclosed in a Chinese invention patent. In this patent, after the contact support and the moving iron core are connected, a pressure plate is used to fix the moving iron core, and screws are also required to connect between the pressure plate and the contact support. This traditional installation structure is relatively complex and brings a lot of inconvenience to the assembly. There is a possibility that the screws will fall off after the contactor is used for a long time with closing. In addition, the function of the contact support is single, only playing the role of fixing the contact and the iron core, while functions such as interlocking function and status indication function usually need to be realized on the contactor product, and the realization of these functions requires the linkage and cooperation of other components, resulting in the overall complexity of the contactor product structure.

[0008] In addition, the contactor products in the prior art also have the problem of relatively high energy consumption. Summary of the Invention

[0009] Aiming at the deficiencies of the prior art, the present invention provides an electromagnetic system with fast breaking speed, simple structure, convenient assembly and higher reliability.

[0010] To achieve the above object, the present invention provides a contactor, which includes a base and a cover body that are connected and matched. A receiving cavity is provided on one side of the base corresponding to the cover body. An armature core, a stationary core, a coil bobbin, and a contact support are arranged in the receiving cavity. A plurality of support blocks are provided on one end side of the stationary core, and a rubber cushion layer is provided on the outer side of the support blocks. A plurality of installation grooves for fitting and positioning in cooperation with the support blocks are provided on one end side of the receiving cavity. The insertion direction of the support blocks relative to the installation grooves is the same as the insertion direction of the stationary core relative to the receiving cavity. During installation, the stationary core and the support blocks can be inserted into the receiving cavity and the installation grooves at the same time. The structure is simple and the installation is convenient. The setting of the rubber cushion layer can, on the one hand, avoid the influence caused by machining precision errors, make the installation between the stationary core and the base more stable and reliable, and is not easy to loosen. Utilizing the characteristics of the material of the rubber cushion layer can also play a role in buffering and shock absorption, improving the anti-impact effect. The stationary core includes a groove, the groove has a first opening at one end of the stationary core, and the groove has second openings on both sides of the stationary core. The coil bobbin is arranged in the groove. The armature core includes a pole column, and the pole column is movably sleeved in cooperation with the inner hole of the coil bobbin. Two first support portions extend inward from both sides of the first opening, and the first support portions and the stationary core are integrally formed. The first opening is formed by the interval between the two first support portions. The end of the pole column extends toward both sides to form two second support portions corresponding to the two first support portions. The setting of the first support portions and the second support portions can improve the electromagnetic attraction effect. The two ends of the coil bobbin are respectively matched and limited with the first support portions and the bottom inner wall of the groove, so that the coil bobbin is not easy to separate from the stationary core or collide greatly in the longitudinal direction. A boss extends upward on the bottom inner wall of the stationary core, and two notches are formed on both sides of the boss. The boss is sleeved and positioned in cooperation with the inner hole of the coil bobbin. In addition to being used for positioning in cooperation with the coil bobbin, the boss is located at a position corresponding to the pole column and can improve the attraction effect; in addition, the setting of the boss enables the length of the pole column to be appropriately reduced, which helps to reduce the weight of the armature core, can improve the breaking speed of the contactor product and weaken the impact force when the armature core is attracted. The armature core and the contact support are inserted and matched. A connecting member is provided on each side of the contact support. The connecting member forms a transverse insertion and positioning cooperation with both sides of the contact support and the connecting member and both sides of the armature core. The contact support and the armature core are connected together through the connecting member, and this insertion and matching is transverse and perpendicular to the attraction direction of the armature core and the stationary core, which can prevent the connection between the connecting member, the contact support, and the armature core from loosening and ensure the reliability of the connection. The connection method between the armature core and the contact support does not require the use of screws, the assembly process is relatively fast and convenient, and it is not easy to loosen during long-term use.

[0011] Further, the support block includes a first connecting rod fixedly connected and fitted with the static iron core, and a rubber ring sleeved outside the first connecting rod. Slots corresponding to and inserted and fitted with both sides of the static iron core are provided on two opposite side walls of the accommodating cavity. The installation grooves are provided at one ends of two opposite side walls of the two slots. Two support blocks are correspondingly provided on each side of the static iron core. The first connecting rod is integrally formed on the static iron core or fixedly inserted through the static iron core.

[0012] Further, the installation groove includes an insertion opening at one end of the base, a support wall at the bottom, and guiding walls distributed on both sides of the support wall. Protrusions for cooperating with, limiting, or clamping and positioning the support block are provided on the guiding walls. The protrusions are arc-shaped protrusions. The rubber ring is cylindrical, and the support wall is arc-shaped.

[0013] Further, the coil bobbin includes a cylindrical portion, a first annular flange and a second annular flange respectively provided at both ends of the cylindrical portion. An annular accommodating groove for winding the coil is formed between the first annular flange and the second annular flange. Both sides of the first annular flange are respectively cooperated with and limited by two first support portions. Both sides of the second annular flange are respectively inserted into the notches on both sides of the boss and are cooperated with and limited by the inner walls of the notches, which can improve the limiting and cooperating effect between the coil bobbin and the static iron core.

[0014] Further, the second annular flange is also provided with a connection groove communicating with the inner hole of the coil bobbin, which enables the boss to be horizontally inserted into the inner hole of the coil bobbin along the connection groove. Furthermore, the coil bobbin can be placed into the groove along the second opening of the static iron core. A limiting stop block is also provided on the first annular flange or the second annular flange. The limiting stop block is cooperated with and limited by the static iron core, so that the coil bobbin can be accurately horizontally inserted in place.

[0015] Further, an embedding groove for embedding the end of the coil is provided on the outer peripheral surface of the second annular flange. One end of the embedding groove communicates with the annular accommodating groove. The end of the coil can extend outward along the other end of the embedding groove, which is convenient for wiring. The setting of the embedding groove has a good protective effect on both ends of the coil and improves the reliability.

[0016] Further, a plurality of heat dissipation long grooves are provided at positions corresponding to the notches on both sides of the outer end of the second annular flange. A plurality of heat dissipation convex strips are spacedly provided at the inner end of the second annular flange. The setting of the heat dissipation long grooves and the heat dissipation convex strips can improve the heat dissipation effect of the second annular flange.

[0017] Furthermore, the moving iron core includes a connecting hole running through both sides thereof, a second connecting rod is passed through the connecting hole, T-slots are provided on both sides of the contact bracket, the connecting component includes a plug-in portion that is laterally plugged in with the T-slot, a positioning hole that is plugged in and positioned with the end of the second connecting rod is provided at the front end of the plug-in portion, protrusions are provided on both sides of the contact bracket at positions below the corresponding T-slots, the connecting component is provided with plug-in holes that are laterally plugged in and positioned with the protrusions, and the contact bracket includes a recess that is plugged in with the end of the moving iron core.

[0018] Furthermore, the outer side of the connecting member has a sliding connection part, and two oppositely arranged side walls of the accommodating cavity are provided with a slide groove that cooperates with the sliding connection part for sliding connection. The sliding cooperation between the sliding connection part and the slide groove ensures the stability of the movement direction of the contact bracket and the moving iron core. The connecting member is respectively provided with a status indicator, an interlocking hole, and an auxiliary contact interface. The status indicator can extend to the outside of the contactor housing with the movement of the connecting member, and is used to intuitively check the working status of the contactor. The interlocking hole is used to cooperate with the interlocking device to realize mechanical interlocking. The auxiliary contact interface is used to cooperate with the auxiliary contact to realize connection and linkage.

[0019] Furthermore, a resistance block is also provided on the contact support, and the base also includes a positioning groove provided adjacent to the accommodating cavity, a switching switch is fixedly installed in the positioning groove, and the coil includes a pull-in coil and a holding coil wound together on the coil frame, the pull-in coil, the holding coil and the switching switch are connected, and the switching switch cooperates with the resistance block to be pressed and triggered, and is used to switch between the pull-in coil and the holding coil being energized at the same time and the holding coil being energized alone. When the dynamic and static iron cores begin to be attracted, the pull-in coil and the holding coil are both in an energized state, which can provide a strong electromagnetic force, thereby accelerating the speed of attraction between the dynamic and static iron cores; when the attraction is completed, the resistance block is driven by the contact support and pressed and triggered in cooperation with the switching switch, and after the switching switch is triggered, the circuit of the pull-in coil is disconnected, so that the holding coil remains energized, and the dynamic and static iron cores can be kept in an attracted state through less power consumption, which can achieve an energy-saving effect.

[0020] Beneficial effects of the present invention: Compared with the prior art, the contactor of the present invention not only has a simple structure, convenient assembly, and strong connection reliability, but also has the advantages of fast breaking speed, impact resistance, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural diagram of an embodiment of the present invention;

[0022] Figure 2 An exploded view of an embodiment of the present invention;

[0023] Figure 3Top view of the base in the embodiment of the present invention;

[0024] Figure 4 is Figure 3 Cross-sectional view along the A-A section line;

[0025] Figure 5 is Figure 3 Cross-sectional view along the B-B section line;

[0026] Figure 6 Schematic diagram of the installation structure of the moving iron core, static iron core and coil skeleton in the embodiment of the present invention;

[0027] Figure 7 Structural diagram of the static iron core in the embodiment of the present invention;

[0028] Figure 8 The structure of the coil skeleton in the embodiment of the present invention Figure 1 ;

[0029] Figure 9 The structure of the coil skeleton in the embodiment of the present invention Figure 2 ;

[0030] Figure 10 Side view of the installation structure of the moving iron core, static iron core and coil skeleton in the embodiment of the present invention;

[0031] Figure 11 is Figure 10 Cross-sectional view along the C-C section line;

[0032] Figure 12 Schematic diagram of the installation of the moving iron core, contact support and connecting member in the embodiment of the present invention;

[0033] Figure 13 Exploded view of the moving iron core, contact support and connecting member in the embodiment of the present invention;

[0034] Figure 14 Schematic diagram of the circuit connection of the changeover switch, pull-in coil and holding coil in the embodiment of the present invention. Detailed implementation manners

[0035] The embodiment of the contactor of the present invention is as Figure 1-13As shown in the figure, it includes a base 1 and a cover 2 which are connected and matched. A receiving cavity 11 is provided on one side of the base 1 corresponding to the cover 2. A moving iron core 3, a static iron core 4, a coil bobbin 5, and a contact support 6 are arranged in the receiving cavity 11. A plurality of support blocks 40 are provided on one end side of the static iron core 4, and a rubber cushion layer is provided on the outer side of the support blocks 40. A plurality of installation grooves 12 which are matched with the support blocks 40 for insertion and positioning are provided on one end side of the receiving cavity 11. The insertion direction of the support blocks 40 relative to the installation grooves 12 is the same as the insertion direction of the static iron core 4 relative to the receiving cavity 11. During installation, the static iron core 4 and the support blocks 40 can be inserted into the receiving cavity 11 and the installation grooves 12 at the same time. The structure is simple and the installation is convenient. When the static iron core 4 and the support blocks 40 are installed in place, the cover 2 and the base 1 are connected. The cover 2 can close the ends of the receiving cavity 11 and the installation grooves 12, which can play a limiting role and prevent the static iron core 4 and the support blocks 40 from coming out of the receiving cavity 11 and the installation grooves 12, thereby further improving the reliability of the installation.

[0036] The rubber cushion layer can, on the one hand, avoid the influence caused by machining precision errors, making the installation between the static iron core 4 and the base 1 more stable and reliable, not prone to looseness. Utilizing the characteristics of the rubber cushion layer's own material can also achieve the effects of buffering and shock absorption, improving the anti-impact effect. The static iron core 4 includes a groove 41. The groove 41 has a first opening 411 at one end of the static iron core 4, and second openings 412 on both sides of the static iron core 4. The coil bobbin 5 is arranged in the groove 41. The lateral width of the coil bobbin 5 is greater than the lateral width of the static iron core 4, so that the side part of the coil bobbin 5 can extend out from the second opening 412. A coil is wound around the coil bobbin 5. The moving iron core 3 includes a pole column 31, and the pole column 31 is movably sleeved in cooperation with the inner hole 51 of the coil bobbin 5. Two first support parts 42 extend inwards from both sides of the first opening 411. The first support parts 42 and the static iron core 4 are integrally formed. The first opening 411 is formed by the interval between the two first support parts 42. The end of the pole column 31 extends towards both sides to form two second support parts 32 corresponding to the two first support parts 42. The settings of the first support parts 42 and the second support parts 32 can improve the electromagnetic attraction effect. The two ends of the coil bobbin 5 are respectively in cooperation with the first support parts 42 and the bottom inner wall of the groove 41 for limiting, so that the coil bobbin 5 is not prone to detachment from the static iron core 4 or large collisions in the longitudinal direction. A boss 43 also extends upwards on the bottom inner wall of the static iron core 4. Two notches 44 are formed on both sides of the boss 43. The boss 43 is in cooperation with the inner hole 51 of the coil bobbin 5 for socketing and positioning. Besides being able to be used for positioning in cooperation with the coil bobbin 5, the boss 43 is located at a position corresponding to the pole column 31, which can improve the attraction effect; in addition, the setting of the boss 43 enables the length of the pole column 31 to be appropriately reduced, which helps to reduce the weight of the moving iron core 3, can improve the breaking speed of the contactor product and weaken the impact force during attraction. The boss 43 and the notches 44 are connected by an arc surface. The arc surface has a good guiding effect on the coil bobbin 5, making the coil bobbin 5 not prone to lateral movement. The moving iron core 3 and the contact support 6 are in plug-in cooperation. A connecting member 7 is provided on each side of the contact support 6. The connecting member 7 forms a transverse plug-in positioning cooperation with both sides of the contact support 6 and both sides of the moving iron core 3. The contact support 6 and the moving iron core 3 are connected together through the connecting member 7. And this plug-in cooperation is transverse, perpendicular to the attraction direction of the moving iron core 3 and the static iron core 4, which can prevent loosening between the connecting member 7, the contact support 6 and the moving iron core 3, ensuring the reliability of the connection. The connection method between the moving iron core 3 and the contact support 6 does not require the use of screws, and the assembly process is relatively fast and convenient, and it is not prone to looseness problems during long-term use.

[0037] The support block 40 includes a first connecting rod 401 fixedly connected and fitted with the static iron core 4, and a rubber ring 402 sleeved outside the first connecting rod 401. On two opposite side walls of the accommodation cavity 11, there are slots 111 corresponding to and inserted and fitted with both sides of the static iron core 4. At one end of two opposite side walls of the two slots 111, there are the installation grooves 12 mentioned above. On both sides of the static iron core 4, there are two support blocks 40 corresponding to each side. The position distribution design of the support blocks 40 and the installation grooves 12 can make the force between the base 1 and the static iron core 4 more uniform, and improve the installation and positioning effect between the two. The first connecting rod 401 is integrally formed on the static iron core 4 or is fixedly inserted through the static iron core 4.

[0038] As Figure 4 shown, the installation groove 12 includes an insertion opening 121 at one end of the base 1, a support wall 122 at the bottom, and guiding walls 123 distributed on both sides of the support wall 122. On the guiding walls 123, there are protrusions 124 for cooperating with, limiting, or clamping and positioning the support block 40. The protrusions 124 are arc-shaped protrusions 124, which helps to reduce resistance and facilitate the insertion of the support block 40. The rubber ring 402 is cylindrical, and the support wall 122 is arc-shaped, which can further improve the contact and cooperation effect between the support block 40 and the support wall 122, improve the installation stability, and prevent the connection from shaking easily. The first connecting rod 401 is cylindrical, and the rubber ring 402 is sleeved outside the first connecting rod 401. The cylindrical first connecting rod 401 is convenient for processing and forming, and is also convenient for the quick socket installation of the rubber ring 402.

[0039] In this embodiment, the protrusion 124 mainly plays a role in cooperating with and limiting the rubber ring 402 of the support block 40. When the support block 40 is inserted into the installation groove 12, by using the deformation characteristic of the rubber ring 402, it can cross over the protrusion 124. When inserted to the position where it abuts against the support wall 122, the protrusion 124 can play a role in limiting the support block 40 to prevent it from coming out upwards. Of course, in other embodiments, the protrusion 124 can also be pressed against and abutted on the rubber ring 402, which can also achieve the same effect.

[0040] As Figure 8 、 9As shown, the coil bobbin 5 includes a cylindrical portion 52, a first annular flange 53 and a second annular flange 54 respectively disposed at both ends of the cylindrical portion 52. An annular accommodating groove 55 for winding the coil is formed between the first annular flange 53 and the second annular flange 54 of the cylindrical portion 52. The coil is wound around the outside of the cylindrical portion 52 and placed in the annular accommodating groove 55. Both sides of the first annular flange 53 are respectively matched and limited with two first supporting portions 42, and both sides of the second annular flange 54 are respectively inserted into the notches 44 on both sides of the boss 43 and are matched and limited with the inner walls of the notches 44, which can improve the limit matching effect between the coil bobbin 5 and the static iron core 4.

[0041] The second annular flange 54 is further provided with a connecting groove 541 communicating with the inner hole 51 of the coil bobbin 5, which enables the boss 43 to be horizontally inserted into the inner hole 51 of the coil bobbin 5 along the connecting groove 541. Furthermore, the coil bobbin 5 can be placed into the groove 41 along the second opening 412 of the static iron core 4. A limiting block 542 is also provided on the second annular flange 54, and the limiting block 542 is matched and limited with the static iron core 4, so that the coil bobbin 5 can be accurately inserted horizontally in place. The limiting block 542 can also be provided on the first annular flange 53.

[0042] During installation, the coil bobbin 5 is inserted into the groove 41 along the second opening 412. During the insertion process, the boss 43 can be placed into the inner hole 51 through the connecting groove 541. Due to the existence of the limiting block 542, the coil bobbin 5 can be conveniently inserted into the correct position, and the installation process is relatively convenient. Specifically, the depth of the connecting groove 541 can be slightly smaller than the height of the boss 43, and the coil bobbin 5 is deformed and inserted into the groove 41 by using the elasticity of the material of the coil bobbin 5 itself, so that the coil bobbin 5 is not easy to withdraw from the groove 41.

[0043] An embedding groove 543 for embedding the end of the coil is provided on the outer peripheral surface of the second annular flange 54. One end of the embedding groove 543 communicates with the annular accommodating groove 55, and the end of the coil can extend outward along the other end of the embedding groove 543, which is convenient for wiring. The setting of the embedding groove 543 has a good protective effect on both ends of the coil and improves the reliability.

[0044] A plurality of heat dissipation long grooves 544 are provided at positions corresponding to the notches 44 on both sides of the outer end of the second annular flange 54. A plurality of heat dissipation ribs 545 are arranged at intervals at the inner end of the second annular flange 54. The settings of the heat dissipation long grooves 544 and the heat dissipation ribs 545 can increase the contact surface with the air and improve the heat dissipation effect of the second annular flange 33.

[0045] A plurality of convex ribs 531 for cooperating with and contacting the first supporting portion 42 are provided at the outer end of the first annular flange 53. The convex ribs 531 are used for cooperating with and contacting the first supporting portion 42, which can reduce the wear of the coil bobbin 5.

[0046] In the above solution, depending on the structural design of the notch 44, the thickness of the second annular flange 33 can also be correspondingly increased, so that more structural features can be arranged on the second annular flange 33 on the premise of ensuring sufficient structural strength, such as the above-mentioned heat dissipation long grooves 544, mounting grooves 12, connecting grooves 541, heat dissipation ribs 545 and other structural features.

[0047] As Figure 12 , 13 shown, the moving iron core 3 includes a connecting hole 35 penetrating through both sides thereof, a second connecting rod 36 is inserted through the connecting hole 35, T-shaped slots 61 are arranged on both sides of the contact support 6, the connecting member 7 includes a plugging portion 71 that is horizontally plugged in cooperation with the T-shaped slots 61, a positioning hole 711 that is plugged and positioned in cooperation with the end of the second connecting rod 36 is arranged at the front end of the plugging portion 71, protrusions 62 are arranged on both sides of the contact support 6 at positions corresponding to the lower sides of the T-shaped slots 61, plugging holes 72 that are horizontally plugged and positioned in cooperation with the protrusions 62 are arranged on the connecting member 7, and the contact support 6 includes a concave portion 63 that is plugged in cooperation with the end of the moving iron core 3.

[0048] The design of the above-mentioned horizontal plugging and positioning structure enables the second connecting rod 36 on the contact support 6 and the moving iron core 3 to be restricted from moving away from each other when horizontally plugged in cooperation with the connecting member 7, improving the reliability of the connection. The arrangement of the connecting member 7 can especially form a limit cooperation between the contact support 6 and the moving iron core 3 along the suction and movement direction, so that a reliable connection is maintained between the contact support 6 and the moving iron core 3.

[0049] The outer side of the connecting member 7 has a sliding connection portion 73, sliding grooves 112 that are slidably connected in cooperation with the sliding connection portion 73 are arranged on two opposite side walls of the accommodating cavity 11, and the stable movement direction of the contact support 6 and the moving iron core 3 is ensured through the sliding cooperation of the sliding connection portion 73 and the sliding grooves 112.

[0050] As Figure 12 shown, a status indicating portion 74, an interlock hole 75, and an auxiliary contact interface 76 are respectively arranged on the connecting member 7. The status indicating portion 74 can extend out of the outer side of the contactor housing or retract along with the movement of the connecting member 7 by cooperating with the status indicating hole on the outer side of the contactor housing, and is used to visually check the working status of the contactor. The interlock hole 75 is used to cooperate with an interlock device to achieve interlock with other contactors. The auxiliary contact interface 76 is used to cooperate with an auxiliary contact to achieve connection and linkage, and holes and grooves 8 for establishing connection with the interlock device and the auxiliary contact are arranged on the base 1 and the cover body 2.

[0051] It should be noted that the structural features and functions of the above-mentioned interlocking hole 75, auxiliary contact interface 76 and status indicator 74 are all present in conventional contactor products, but they are usually directly configured on the contact bracket 6, which has certain requirements for the structure of the contact bracket 6, increasing the difficulty of the production process, or they are realized through the linkage of other parts that cooperate with the contact bracket 6, which leads to an increase in parts and components and an increase in the complexity of the overall structure of the contactor, and also increases the difficulty of assembly. In the present invention, these structural features are combined with the connecting member used to connect the contact bracket 6 and the moving iron core 3, which has a simple structure, fewer parts, and is convenient for production and processing.

[0052] In addition, a resistance block 64 is also provided on the contact bracket 6, and the base 1 also includes a positioning groove 13 arranged adjacent to the accommodating cavity 11, and a switching switch 91 is installed and fixed in the positioning groove 13. The coil includes a suction coil 92 and a holding coil 93 wound together on the coil frame, and the switching switch 91 is connected between the suction coil 92, the holding coil 93 and the power supply module. The switching switch 91 cooperates with the resistance block 64 to be pressed and triggered, and is used to switch between the state in which the suction coil 92 and the holding coil 93 are energized at the same time and the state in which the holding coil is energized alone. When the moving and static iron cores begin to attract, the attracting coil and the holding coil are both in the energized state, which can provide a strong electromagnetic force, thereby accelerating the attracting speed between the moving and static iron cores; when the attraction is completed, the abutment block 64 is driven by the contact bracket and pressed and triggered in cooperation with the switching switch 91. After the switching switch 91 is triggered, the power supply circuit of the attracting coil 92 is disconnected, and only the holding coil 93 is kept energized. With less power consumption, the moving and static iron cores can be kept in the attracted state continuously, which can achieve energy saving. The switching switch 91 has a self-reset function. When the moving and static iron cores are separated, it will automatically restore to a state where the attracting coil 92 and the holding coil 93 can be energized at the same time.

[0053] The circuit structure of the pull-in coil 92, the holding coil 93 and the switch 91 is as follows: Figure 14 As shown, the pull-in coil 92 and the holding coil 93 are connected in parallel, the pull-in coil 92 and the holding coil 93 are in different branches, the switching switch 91 and the pull-in coil 92 are connected in series on the same branch, and when the switching switch 91 is pressed and triggered, the power supply of the pull-in coil 92 will be cut off.

[0054] The contact support 6 of the present invention not only has multiple functional derived interfaces, a compact structure, and is easy to assemble, but also has good connection reliability.

[0055] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A contactor, comprising a base and a cover which are connected and matched. A receiving cavity is provided on one side of the base corresponding to the cover. A moving iron core, a static iron core, a coil, a coil skeleton, and a contact support are arranged in the receiving cavity. The coil is wound around the coil skeleton, and it is characterized in that: A plurality of support blocks are provided on one end side of the static iron core, and a rubber cushion layer is provided on the outer side of the support blocks. A plurality of mounting grooves for fitting and positioning in cooperation with the support blocks are provided on one end side of the accommodation cavity. The insertion direction of the support blocks relative to the mounting grooves is the same as the insertion direction of the static iron core relative to the accommodation cavity. The static iron core includes a groove, which has a first opening at one end of the static iron core and second openings on both sides of the static iron core. The coil bobbin is arranged in the groove. The moving iron core includes a pole column, and the pole column is movably sleeved in cooperation with the inner hole of the coil bobbin. Two first support portions are formed by inward extension on both sides of the first opening, and the first opening is formed by the interval between the two first support portions. The end of the pole column extends towards both sides, and a second support portion is formed on each side. The two second support portions respectively correspond to the two first support portions. The two ends of the coil bobbin are respectively limited in cooperation with the first support portion and the bottom inner wall of the groove. A boss extends upwards on the bottom inner wall of the static iron core, and two notches are formed on both sides of the boss. The boss is sleeved and positioned in cooperation with the inner hole of the coil bobbin. The moving iron core and the contact support are inserted and matched. A connecting member is provided on each side of the contact support. The connecting member and the two sides of the contact support and the connecting member and the two sides of the moving iron core form a horizontal insertion and positioning cooperation.

2. The contactor according to claim 1, characterized in that: The support block includes a first connecting rod fixedly connected with the static iron core and a rubber ring sleeved on the outer side of the first connecting rod. Slots for corresponding insertion and cooperation with both sides of the static iron core are provided on two opposite side walls of the accommodation cavity. The mounting grooves are provided at one ends of two opposite side walls of the two slots. Two of the support blocks are correspondingly provided on each side of the static iron core.

3. The contactor according to claim 2, characterized in that: The mounting groove includes an insertion opening at one end of the base, a support wall at the bottom, and guiding walls distributed on both sides of the support wall. Protrusions for limiting or clamping and positioning in cooperation with the support blocks are provided on the guiding walls. The protrusions are arc-shaped protrusions. The rubber ring is cylindrical, and the support wall is arc-shaped.

4. The contactor according to claim 1, characterized in that: The coil bobbin includes a cylindrical portion, a first annular flange and a second annular flange respectively provided at both ends of the cylindrical portion. An annular accommodation groove for winding the coil is formed between the first annular flange and the second annular flange of the cylindrical portion. The two sides of the first annular flange are respectively limited in cooperation with the two first support portions. The two sides of the second annular flange are respectively inserted into the notches on both sides of the boss.

5. The contactor according to claim 4, characterized in that: The second annular flange is further provided with a connecting groove communicated with the inner hole of the coil bobbin. The boss can be horizontally inserted into the inner hole of the coil bobbin along the connecting groove. A limiting block is further provided on the first annular flange or the second annular flange. The limiting block is limited in cooperation with the static iron core.

6. The contactor according to claim 4, characterized in that: An embedding groove for embedding the end of the coil is provided on the outer peripheral surface of the second annular flange. One end of the embedding groove is communicated with the annular accommodation groove.

7. The contactor according to claim 4, characterized in that: A plurality of heat dissipation long grooves are provided at positions corresponding to the notches on both outer ends of the second annular flange. A plurality of heat dissipation ridges are arranged at intervals on the inner end of the second annular flange.

8. The contactor according to claim 1, characterized in that: The moving iron core includes a connecting hole running through both sides thereof, a second connecting rod is passed through the connecting hole, T-slots are arranged on both sides of the contact bracket, the connecting component includes a plug-in portion which is laterally plugged in with the T-slot, a positioning hole which is plugged in and positioned with the end of the second connecting rod is arranged at the front end of the plug-in portion, protrusions are arranged on both sides of the contact bracket at positions below the corresponding T-slots, a plug-in hole which is laterally plugged in and positioned with the protrusions is arranged on the connecting component, and the contact bracket includes a recess which is plugged in with the end of the moving iron core.

9. The contactor according to claim 1, characterized in that: The outer side of the connecting member has a sliding connection part, and two oppositely arranged side walls of the accommodating cavity are provided with sliding grooves that cooperate with the sliding connection part for sliding connection. The connecting member is respectively provided with a state indicating part, an interlocking hole, and an auxiliary contact interface.

10. The contactor according to claim 1, characterized in that: A resistance block is also provided on the contact bracket, and the base also includes a positioning groove arranged adjacent to the accommodating cavity, in which a switching switch is installed and fixed, and the coil includes a pull-in coil and a holding coil wound together on the coil frame, and the pull-in coil, the holding coil and the switching switch are connected, and the switching switch cooperates with the resistance block to be pressed and triggered, and is used to switch between the state in which the pull-in coil and the holding coil are energized at the same time and the state in which the holding coil is energized alone.

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