Combined energy-saving electromagnetic switch

Abstract

The present invention relates to the technical field of electromagnetic switches, specifically a combined energy-saving electromagnetic switch, which includes a first housing, a movable iron core, a fixed iron core, a coil assembly, and a first central axis. It also includes a connecting plate and a second housing. A cavity is provided at the left end of the first housing. The movable iron core, the fixed iron core, the coil assembly, and the first central axis are arranged in the cavity of the first housing. A first cavity is provided at the right end of the second housing, and a second connecting hole matching a second bolt with a static contact is provided at the left end. The left end of the first housing and the right end of the second housing are detachably connected by the connecting plate and fasteners. This combined energy-saving electromagnetic switch is of a combined detachable connection type. When the movable contact and the static contact are in contact, they can be locked. By arranging a spring and an abutting member on the inner wall of the second housing, when the movable contact and the static contact are in contact, the abutting member extends into the lower end of the connecting plate, restricting the downward movement of the connecting plate, realizing the locking of the movable contact and the connecting contact, and even if the coil power supply is disconnected, it does not affect the loop closure, saving electric energy.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic switches, and particularly to a combined energy-saving electromagnetic switch. Background Art

[0002] The working principle of a general electromagnetic switch is as follows: A coil generates magnetic force to form a magnetic flux loop and makes the fixed core have magnetic force. The moving core moves under the attraction of the fixed core with magnetic force, and the moving core drives the moving contact to move to contact or not contact the fixed contact through a shaft, thereby realizing the connection and disconnection of electricity.

[0003] For a traditional electromagnetic switch, if the loop is to be kept unobstructed, it needs to be kept energized for a long time. Such a practice will cause the following problems: The coil is continuously energized, resulting in an increase in the coil temperature, accelerating aging, and having high energy consumption and low energy efficiency.

[0004] In a traditional electromagnetic switch, the shaft, iron core, and contacts are usually arranged in a housing, and the movement of the moving iron core and the moving contact is completed through a single shaft. During the opening and closing of the switch, the shaft is inevitably worn. When maintenance is required, the entire housing needs to be disassembled to remove the shaft, and such a practice will inevitably affect other parts.

[0005] Therefore, we propose a combined energy-saving electromagnetic switch. Summary of the Invention

[0006] One technical problem to be solved by this application is that for a traditional electromagnetic switch, if the loop is to be kept unobstructed, it needs to be kept energized for a long time. Such a practice will cause the following problems: The coil is continuously energized, resulting in an increase in the coil temperature, accelerating aging, and having high energy consumption and low energy efficiency.

[0007] In a traditional electromagnetic switch, the shaft, iron core, and contacts are usually arranged in a housing, and the movement of the moving iron core and the moving contact is completed through a single shaft. During the opening and closing of the switch, the shaft is inevitably worn. When maintenance is required, the entire housing needs to be disassembled to remove the shaft, and such a practice will inevitably affect other components.

[0008] To solve the above technical problems, the embodiment of this application provides a combined energy-saving electromagnetic switch, which includes a first housing, a moving iron core, a fixed iron core, a coil assembly, a first middle shaft, and further includes a connecting plate and a second housing;

[0009] A cavity is provided at the left end of the first housing, and the moving iron core, the fixed iron core, the coil assembly, and the first middle shaft are arranged in the cavity of the first housing;

[0010] A first cavity is provided at the right end of the second housing, and a second connecting hole matching the second bolt with a static contact is provided at the left end;

[0011] The left end of the first housing and the right end of the second housing are detachably connected through a connecting plate and a fastener.

[0012] In some embodiments, the coil assembly includes a coil body and a bobbin. The coil body is wound around the bobbin, and the interior of the coil assembly is hollow.

[0013] In some embodiments, a circular groove is formed at the left end of the movable iron core, and the overall shape is cylindrical.

[0014] The interior of the fixed iron core is hollow, and the diameter of the inner cavity of the fixed iron core is equal to the diameter of the circular groove at the left end of the movable iron core.

[0015] The outer diameter of the fixed iron core and the outer diameter of the movable iron core are smaller than the diameter of the inner cavity of the coil assembly.

[0016] The fixed iron core is arranged at the left end of the movable iron core, and there is a distance between the fixed iron core and the movable iron core.

[0017] In some embodiments, the first central axis includes a first spring, a second spring, and a shaft body. The first spring is arranged on the shaft body, and the second spring is arranged at the left end of the shaft body. The length of the second spring is shorter than that of the first spring.

[0018] The diameter of the first central axis is smaller than the diameter of the circular groove at the left end of the movable iron core and smaller than the diameter of the inner cavity of the fixed iron core.

[0019] In some embodiments, the second housing includes a flange plate, a housing body, and a second protrusion.

[0020] The flange plate is arranged at the right end of the second housing, and a plurality of first connection holes are formed on the flange plate. The first connection holes are through holes.

[0021] The second protrusion is arranged on the left end face of the housing body. Second connection holes are symmetrically arranged on both sides of the second protrusion. The second connection holes are through holes and are provided with threads inside.

[0022] The positioning groove is arranged on the inner wall at the left end of the housing body. The positioning groove is a blind hole and has a diameter equal to that of the second protrusion.

[0023] In some embodiments, a second central axis and a movable plate are arranged in the first cavity at the right end of the second housing.

[0024] The second central axis includes a third spring, a support plate, and a cylindrical shaft. The third spring is arranged on the cylindrical shaft, and the left end of the cylindrical shaft is integrally connected with the support plate.

[0025] A magnet is arranged inside the support plate.

[0026] The movable plate includes a first protrusion, a movable contact, and a fourth spring.

[0027] Movable contacts are symmetrically arranged on both sides of the first protrusion, and the fourth spring is arranged on the first protrusion.

[0028] The movable plate is provided with a magnet with a magnetic property opposite to that of the magnet in the support plate, so that when the coil assembly is powered on and off, the support plate and the movable plate can be adsorbed together by magnetic attraction and move left and right along the length direction of the second housing;

[0029] The function of the positioning groove is to determine the position of the first protrusion of the movable plate and the fourth spring arranged on the first protrusion, and ensure that the fourth spring is connected to the inner wall of the positioning groove.

[0030] In some embodiments, a limiting groove is provided on the inner wall of the second housing, and a fifth spring and an abutting member are arranged in the limiting groove;

[0031] One end of the fifth spring is connected to the abutting member, and the other end of the fifth spring is connected to the inner wall of the limiting groove;

[0032] One end of the abutting member is connected to the fifth spring, and the other end of the abutting member abuts against the side surface of the movable plate;

[0033] When the other end of the abutting member abuts against the side surface of the movable plate, the fifth spring is in a compressed state;

[0034] The abutting member is provided with a magnet with a magnetic property opposite to that of the magnet in the movable plate and a magnet with the same magnetic property as the magnet in the support plate.

[0035] In some embodiments, the second bolt includes a static contact and a nut. The second bolt is arranged in the second connection hole. The static contact is located inside the second housing, and the position of the static contact corresponds to that of the movable contact. The nut is located outside the left end of the second housing, and the nut is symmetrically arranged on both sides of the second protrusion.

[0036] In some embodiments, a plurality of blind hole connection grooves with the same size and position as the first connection hole are provided on the left end face of the first housing, and the diameter of the cavity of the first housing is larger than the diameter of the coil assembly;

[0037] The connecting plate is provided with a through hole connection groove with the same size and position as the first connection hole, and the connecting plate is also provided with a through hole guiding groove with the same diameter as the first central axis.

[0038] The bottom surface of the cylindrical shaft at the right end of the second central axis is connected to the left end of the second spring.

[0039] The present invention has at least the following beneficial effects:

[0040] When the movable contact contacts the static contact, it can be locked. By arranging a spring and an abutting member on the inner wall of the second housing, when the movable contact and the static contact do not contact, the abutting member abuts against the connecting plate provided with the movable contact; when the movable contact and the static contact contact, the abutting member extends into the lower end of the connecting plate, restricting the downward movement of the connecting plate, realizing the locking of the movable contact and the connecting contact, and even if the power supply of the coil is disconnected, it does not affect the circuit closure, saving electric energy.

[0041] This switch device is of a combined detachable connection type. The first housing and the second housing are detachably connected through a connecting plate and fasteners. In the case where the device parts need to be repaired, the device can be disassembled to take out the parts that need to be repaired, without affecting other parts. Brief Description of the Drawings

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of the second housing of the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of the second housing of the present invention from another angle;

[0046] Figure 5 It is a cross-sectional view of the structure of the first housing of the present invention;

[0047] Figure 6 It is an enlarged schematic view of the A position of the cross-sectional view of the overall structure of the present invention;

[0048] Figure 7 It is a schematic diagram of the structure of the second central axis of the present invention;

[0049] Figure 8 It is a cross-sectional view of the overall structure of the present invention when it is first powered on;

[0050] Figure 9 It is a cross-sectional view of the overall structure of the present invention when it is first powered off;

[0051] Figure 10 It is a cross-sectional view of the overall structure of the present invention when it is secondarily powered on.

[0052] In the figures: 1 - First housing; 2 - Moving iron core; 3 - Coil assembly; 4 - First central axis; 5 - Fixed iron core; 6 - Connecting plate; 7 - Second central axis; 8 - Movable plate; 9 - Second housing; 10 - First bolt; 11 - Second bolt; 31 - Coil body; 32 - Coil bobbin; 41 - First spring; 42 - Second spring; 43 - Shaft body; 71 - Third spring; 72 - Support plate; 73 - Cylindrical shaft; 81 - First protrusion; 82 - Movable contact; 83 - Fourth spring; 91 - Flange plate; 911 - First connection hole; 92 - Housing body; 921 - Second connection hole; 93 - Second protrusion; 931 - Positioning groove; 94 - First cavity; 95 - Abutment; 96 - Fifth spring; 97 - Limiting groove; 111 - Fixed contact; 112 - Nut. Detailed Description of the Invention

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] Embodiment 1: Please refer to Figure 1-7 , the present invention provides a technical solution: a combined energy-saving electromagnetic switch, including a first housing 1, a movable iron core 2, a fixed iron core 5, a coil assembly 3, and a first central axis 4. It further includes a connecting plate 6 and a second housing 9. A cavity is provided at the left end of the first housing 1. The movable iron core 2, the fixed iron core 5, the coil assembly 3, and the first central axis 4 are arranged in the cavity of the first housing 1. A first cavity 94 is provided at the right end of the second housing 9, and a second connection hole 921 matching the second bolt 11 with a static contact 111 is provided at the left end. The left end of the first housing 1 and the right end of the second housing 9 are detachably connected through the connecting plate 6 and a fastener, and the fastener is a first bolt 10.

[0055] Furthermore, the coil assembly 3 includes a coil body 31 and a bobbin 32. The coil body 31 is wound around the bobbin 32, and the inside of the coil assembly 3 is hollow.

[0056] Furthermore, a circular groove is opened at the left end of the movable iron core 2, and the whole is in a cylindrical shape. The inside of the fixed iron core 5 is hollow. The diameter of the inner cavity of the fixed iron core 5 is equal to the diameter of the circular groove at the left end of the movable iron core 2. The outer diameter of the fixed iron core 5 and the outer diameter of the movable iron core 2 are smaller than the inner cavity diameter of the coil assembly 3. The fixed iron core 5 is arranged at the left end of the movable iron core 2, and there is a distance between the fixed iron core 5 and the movable iron core 2.

[0057] Furthermore, the first central axis 4 includes a first spring 41, a second spring 42, and a shaft body 43. The first spring 41 is arranged on the shaft body 43, and the second spring 42 is arranged at the left end of the shaft body 43. The length of the second spring 42 is smaller than that of the first spring 41. The diameter of the first central axis 4 is smaller than the diameter of the circular groove at the left end of the movable iron core 2 and smaller than the inner cavity diameter of the fixed iron core 5.

[0058] Furthermore, the second housing 9 includes a flange plate 91, a housing body 92, and a second protrusion 93. The flange plate 91 is arranged at the right end of the second housing 9. A plurality of first connection holes 911 are provided on the flange plate 91, and the first connection holes 911 are through holes. The second protrusion 93 is arranged on the left end face of the housing body 92. Second connection holes 921 are symmetrically arranged on both sides of the second protrusion 93. The second connection holes 921 are through holes and are provided with threads inside. A positioning groove 931 is arranged on the inner wall of the left end of the housing body 92. The positioning groove 931 is a blind hole and has a diameter equal to that of the second protrusion 93.

[0059] Further, a second central shaft 7 and a movable plate 8 are arranged in a first cavity 94 at the right end of a second housing 9. The second central shaft 7 includes a third spring 71, a support plate 72, and a cylindrical shaft 73. The third spring 71 is arranged on the cylindrical shaft 73. The left end of the cylindrical shaft 73 is integrally connected to the support plate 72. A magnet is arranged in the support plate 72. The movable plate 8 includes a first protrusion 81, a movable contact 82, and a fourth spring 83. Movable contacts 82 are symmetrically arranged on both sides of the first protrusion 81. The fourth spring 83 is arranged on the first protrusion 81. A magnet with a magnetic property different from that of the magnet in the support plate 72 is arranged in the movable plate 8, so that when the coil assembly 3 is powered on and off, the support plate 72 and the movable plate 8 can be adsorbed together by magnetic attraction and move left and right along the length direction of the second housing 9.

[0060] The function of the positioning groove 931 is to determine the position of the first protrusion 81 of the movable plate 8 and the fourth spring 83 arranged on the first protrusion 81, and ensure that the fourth spring 83 is connected to the inner wall of the positioning groove 931.

[0061] Further, a limiting groove 97 is arranged on the inner wall of the second housing 9. A fifth spring 96 and a abutting member 95 are arranged in the limiting groove 97. One end of the fifth spring 96 is connected to the abutting member 95, and the other end of the fifth spring 96 is connected to the inner wall of the limiting groove 97;

[0062] One end of the abutting member 95 is connected to the fifth spring 96, and the other end of the abutting member 95 is in contact with the side surface of the movable plate 8. When the other end of the abutting member 95 is in contact with the side surface of the movable plate 8, the fifth spring 96 is in a compressed state. A magnet with a magnetic property different from that of the magnet in the movable plate 8 and a magnet with the same magnetic property as the magnet in the support plate 72 are provided inside the abutting member 95. The purpose is that when the coil assembly 3 is not powered on, the abutting member 95 and the movable plate 8 are attracted and connected to each other by the magnetic attraction force generated by the magnets with different magnetic properties and, together with the fourth spring 83, ensure that the movable plate 8 is in a balanced state; when the coil assembly 3 is powered on for the first time, the first central shaft 4 drives the second central shaft 7 to move to the left. The support plate 72 of the second central shaft 7 and the movable plate 8 move to the left due to the magnetic attraction force generated by the magnets with different magnetic properties inside. At this time, the third spring 71 of the second central shaft 7 is in a compressed state, so that the movable contact 82 of the movable plate 8 contacts the static contact 111. When the coil assembly 3 is powered off for the first time, the support plate 72 moves to the right due to the third spring 71 of the second central shaft 7 changing from the compressed state to the stretched state and then disconnects from the movable plate 8. At this time, the first abutting member 95 extends into the bottom of the movable plate 8 due to the state of the fifth spring 96 changing from the compressed state to the stretched state, thereby restricting the movable plate 8 from moving to the right; when the coil assembly 3 is powered on for the second time, the support plate 72 of the second central shaft 7 contacts the bottom of the movable plate 8 due to the first central shaft 4 driving the second central shaft 7 to move to the left. At this time, due to the abutting member 95 extending into the bottom of the movable plate 8 and the support plate 72 having magnets with the same magnetic property, a magnetic repulsive force is generated, so that the abutting member 95 is pushed out of the bottom of the movable plate 8 to reach the edge position of the side surface of the movable plate 8. At this time, when the coil assembly 3 is powered off for the second time, the support plate 72 drives the movable plate 8 to move to the right. The abutting member 95 just abuts against the side surface of the movable plate 8 due to the rightward movement of the movable plate. And because the fourth spring 83 is connected to the first protrusion 81 of the movable plate 8 to restrict the movement of the movable plate 8, the movable plate 8 will be separated from the support plate 72. The support plate 72 moves to the right to the initial position under the action of the second central shaft 7 and the first central shaft 4.

[0063] Further, the second bolt 11 includes a static contact 111 and a nut 112. The second bolt 11 is disposed in the second connection hole 921. The static contact 111 is located inside the second housing 9. The position of the static contact 111 corresponds to that of the movable contact 82. The nut 112 is located outside the left end of the second housing 9, and the nut 112 is symmetrically disposed on both sides of the second protrusion 93.

[0064] Further, a plurality of blind hole connection grooves with the same size and position as the first connection hole 911 are provided on the left end surface of the first housing 1. The diameter of the cavity of the first housing 1 is larger than the diameter of the coil assembly 3. The connecting plate 6 is provided with a through hole connection groove with the same size and position as the first connection hole 911. The connecting plate 6 is further provided with a through hole guiding groove with the same diameter as the first central shaft 4. The bottom surface of the cylindrical shaft 73 at the right end of the second central shaft 7 is connected to the left end of the second spring 42, and the connection between the cylindrical shaft 73 and the left end of the second spring is a bolt connection.

[0065] The following combines with Figure 1-7 to introduce the device assembly situation:

[0066] First, install the coil assembly 3 into the cavity of the first housing 1. Among them, the coil 31 in the coil assembly 3 is wound around the bobbin 32. Then, install the movable iron core 2 into the bottom of the cavity of the coil assembly 3. Next, install the fixed iron core 5 into the left end of the cavity of the coil assembly 3. Then, insert the first central shaft 4 into the cavities of the fixed iron core 5 and the movable iron core 2. Among them, the first spring 41 is arranged on the shaft body 43, and the second spring 42 is arranged at the left end of the shaft body 43. Then, combine the connecting plate 6 with the first housing 1. Among them, the through-hole connecting groove of the connecting plate 6 is aligned with the blind-hole connecting groove of the first housing 1, and the through-hole guiding groove of the connecting plate 6 is aligned with the left end face of the first central shaft 4.

[0067] Then, connect the right end face of the cylindrical shaft 73 of the second central shaft 7 to the second spring 42. Then, connect the first protrusion 81 on the movable plate 8 to the left end face of the positioning groove 931 of the second housing 9 through the fourth spring 83. The two ends of the movable plate 8 are in mutual contact with the abutting member 95. The abutting member 95 is connected to the fifth spring 96, and the fifth spring 96 is connected to the inner wall of the limiting groove 97. Then, pass the second bolt 11 through the second connection hole 921. Among them, the static contact 111 of the second bolt 11 is in the first cavity 94 of the second housing 9, and the nut 112 of the second bolt 11 is outside the left end face of the second housing 9.

[0068] Finally, butt the right end flange 91 of the assembled second housing 9 with the connecting plate 6 and the first housing 1. Among them, the first connection hole 911 of the flange 91, the through-hole connecting groove of the connecting plate 6, and the blind-hole connecting groove of the first housing 1 are aligned and connected by the first bolt 10. Thus, the entire device assembly is completed.

[0069] The following combines with Figure 1 and Figure 8-10 to introduce the contact and separation process between the movable contact 82 and the static contact 111 under the conditions of power on and power off:

[0070] In the first stage, when the coil assembly 3 is not powered on, as Figure 1 shown, the movable iron core 2 and the fixed iron core 5 do not move. The first spring 41 and the second spring 42 in the first central shaft 4 are in a balanced state. The third spring 71 in the second central shaft 7 is in a balanced state. The fourth spring 83 on the movable plate 8 is in a balanced state. The fifth spring 96 in the limiting groove 97 is in a compressed state.

[0071] In the second stage, when the coil assembly 3 is powered on for the first time, as Figure 8As shown, the current passes through the coil body 31 wound on the bobbin 32 to form a magnetic path, turning the coil assembly 3 and the fixed iron core 5 into an electromagnet. The fixed iron core 5 attracts the movable iron core 2 to move to the left due to the magnetic attraction force, and the movable iron core 2 drives the first central axis 4 to move to the left. The first spring 41 of the first central axis 4 is compressed due to the leftward movement of the first central axis 4, and the second spring 42 of the first central axis 4 is compressed due to the leftward movement of the first central axis 4, which then drives the second central axis 7 to continue to move to the left, so that the third spring 71 of the second central axis 7 is in a compressed state and the top of the support plate 72 is against the bottom of the movable plate 8, pushing the movable plate 8 to move to the left, compressing the fourth spring 83 on the movable plate 8.

[0072] Then, the movable plate 8 is pushed to move to the left, so that the movable contact 82 of the movable plate 8 contacts the static contact 111 of the second bolt 11, and the contact circuit of the movable contact 82 and the static contact 111 is closed. At the same time, the fifth spring 96 in the limiting groove 97 changes from a compressed state to an extended state, extending inwardly to push the abutment member 95 into the bottom of the movable plate 8, limiting the movable plate 8 from moving to the right.

[0073] Stage 3, when the coil assembly 3 is powered off for the first time, Figure 9 As shown, the coil assembly 3 is powered off, and the support plate 72 of the second central axis 7 moves to the right under the tension of the second spring 42, and the support plate 72 is separated from the movable plate 8. At this time, the state of the fifth spring 96 in the limiting groove 97 changes from a compressed state to an extended state, and extends inward to push the abutment member 95 into the bottom of the movable plate 8, limiting the movement of the movable plate 8 to the right. At this time, the movable contact 82 is in contact with the static contact 111, and the circuit is still in a closed state.

[0074] Stage 4, the coil assembly 3 is in the second charging state, such as Figure 10 As shown, the second central axis 7 moves to the left under the push of the second spring 42 and the shaft body 43 of the first central axis 4. When the support plate 72 contacts the bottom of the movable plate 8, since a magnet is provided in the support plate 72 and a magnet is provided at the bottom of the abutment 95, and the magnetism of the magnet in the support plate 72 is the same as that of the abutment 95, the magnetic repulsion force compresses the abutment 95 back to the position as shown in FIG. Figure 1 state, and a magnet with a magnetic property opposite to that of the support plate 72 is provided in the movable plate 8. At this time, the support plate 72 contacts the bottom of the movable plate 8, and the movable contact 82 is in contact with the static contact 111.

[0075] Stage 5: When the coil assembly 3 is powered off for the second time, Figure 1As shown, the second central axis 7 moves to the right under the push of the second spring 42 and the shaft body 43 of the first central axis 4. At the same time, since the state of the fourth spring 83 changes from the compressed state to the extended state, it pushes the movable plate 8 to move to the right. Moreover, the bottom of the movable plate 8 and the support plate 72 move together due to magnetic adsorption. When the state of the fourth spring 83 changes from the compressed state to the balanced state, the support plate 72 separates from the bottom of the movable plate 8, and the movable contact 82 and the static contact 111 are in a separated state. At this time, the abutting member 95 just abuts against the side of the movable plate 8. The second central axis 7 moves to the right under the action of the second spring 42, and the first central axis 4 moves to the right under the action of the first spring 41. Finally, the movable iron core 2, the first central axis 4, and the second central axis 7 return to as shown in Figure 1 the original state.

[0076] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. The combined energy-saving electromagnetic switch includes a first housing (1), a movable iron core (2), a fixed iron core (5), a coil assembly (3), and a first central shaft (4), and is characterized in that: It also includes a connecting plate (6) and a second housing (9); A cavity is provided at the left end of the first housing (1), and the movable iron core (2), the fixed iron core (5), the coil assembly (3), and the first central shaft (4) are arranged in the cavity of the first housing (1); A first cavity (94) is provided at the right end of the second housing (9), and a second connection hole (921) matching the second bolt (11) with a static contact (111) is provided at the left end. A second central shaft (7) integrally connected with a support plate (72) and a cylindrical shaft (73), and a movable plate (8) with a movable contact (82) are arranged in the first cavity (94) at the right end of the second housing (9). A limiting groove (97) is provided on the inner wall of the second housing (9), and a fifth spring (96) and a abutting member (95) are arranged in the limiting groove (97). The abutting member (95) is in abutting contact with the side surface of the movable plate (8). Magnets are arranged in the abutting member (95), the support plate (72), and the movable plate (8). The magnetic poles of the opposite ends of the magnets in the support plate (72) and the movable plate (8) are different. The magnetic poles of the opposite ends of the magnets in the abutting member (95) and the movable plate (8) are different. The magnetic poles of the opposite ends of the magnets in the abutting member (95) and the support plate (72) are the same; The left end of the first housing (1) and the right end of the second housing (9) are detachably connected by the connecting plate (6) and fasteners.

2. The combined energy-saving electromagnetic switch according to claim 1, wherein: The coil assembly (3) includes a coil body (31) and a bobbin (32). The coil body (31) is wound around the bobbin (32), and the inside of the coil assembly (3) is hollow.

3. The combined energy-saving electromagnetic switch according to claim 2, wherein: A circular groove is opened at the left end of the movable iron core (2), and the whole is in a cylindrical shape; The inside of the fixed iron core (5) is hollow, and the diameter of the inner cavity of the fixed iron core (5) is equal to the diameter of the circular groove at the left end of the movable iron core (2); The outer diameter of the fixed iron core (5) and the outer diameter of the movable iron core (2) are smaller than the diameter of the inner cavity of the coil assembly (3); The fixed iron core (5) is arranged at the left end of the movable iron core (2), and a distance is left between the fixed iron core (5) and the movable iron core (2).

4. The combined energy-saving electromagnetic switch according to claim 3, characterized in that: The first central shaft (4) includes a first spring (41), a second spring (42), and a shaft body (43). The first spring (41) is arranged on the shaft body (43), and the second spring (42) is arranged at the left end of the shaft body (43). The length of the second spring (42) is smaller than that of the first spring (41); The diameter of the first central shaft (4) is smaller than the diameter of the circular groove at the left end of the movable iron core (2) and smaller than the diameter of the inner cavity of the fixed iron core (5).

5. The combined energy-saving electromagnetic switch according to claim 4, characterized in that: The second housing (9) includes a flange plate (91), a housing body (92), a second protrusion (93), and a positioning groove (931); The flange plate (91) is arranged at the right end of the second housing (9), and a plurality of first connection holes (911) are arranged on the flange plate (91). The first connection holes (911) are through holes; The second protrusion (93) is arranged on the left end face of the housing body (92). Second connection holes (921) are symmetrically arranged on both sides of the second protrusion (93). The second connection holes (921) are through holes and are provided with threads inside. The positioning groove (931) is arranged on the inner wall of the left end of the housing body (92). The positioning groove (931) is a blind hole and has the same diameter as the second protrusion (93).

6. The combined energy-saving electromagnetic switch according to claim 5, characterized in that: The second central shaft (7) further includes a third spring (71). The third spring (71) is arranged on the cylindrical shaft (73). The movable plate (8) further includes a first protrusion (81) and a fourth spring (83). The movable contact (82) is arranged on both sides of the first protrusion (81) of the movable plate. The fourth spring (83) is arranged on the first protrusion (81). When the coil assembly (3) is powered on and off, the support plate (72) and the movable plate (8) can be adsorbed together by magnetic attraction and move left and right along the length direction of the second housing (9). The function of the positioning groove (931) is to determine the position of the first protrusion (81) of the movable plate (8) and the fourth spring (83) arranged on the first protrusion (81), and ensure that the fourth spring (83) is connected to the inner wall of the positioning groove (931).

7. The combined energy-saving electromagnetic switch according to claim 1, characterized in that: One end of the fifth spring (96) is connected to the abutting member (95), and the other end of the fifth spring (96) is connected to the inner wall of the limiting groove (97). One end of the abutting member (95) is connected to the fifth spring (96), and the other end of the abutting member (95) is in contact with the side surface of the movable plate (8). When the other end of the abutting member (95) is in contact with the side surface of the movable plate (8), the fifth spring (96) is in a compressed state.

8. The combined energy-saving electromagnetic switch according to claim 5, characterized in that: The second bolt (11) includes a static contact (111) and a nut (112). The second bolt (11) is arranged in the second connection hole (921). The static contact (111) is located inside the second housing (9). The position of the static contact (111) corresponds to that of the movable contact (82). The nut (112) is located outside the left end of the second housing (9). The nuts (112) are symmetrically arranged on both sides of the second protrusion (93).

9. The combined energy-saving electromagnetic switch according to claim 5, characterized in that: The left end face of the first housing (1) is provided with a plurality of blind hole connection grooves having the same size and position as the first connection holes (911). The diameter of the cavity of the first housing (1) is larger than the diameter of the coil assembly (3). The connecting plate (6) is provided with through hole connection grooves having the same size and position as the first connection holes (911). The connecting plate (6) is further provided with through hole guiding grooves having the same diameter as the first central shaft (4).

10. The combined energy-saving electromagnetic switch according to claim 6, characterized in that: The bottom surface of the cylindrical shaft (73) at the right end of the second central shaft (7) is connected to the left end of the second spring (42).

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