Combined energy-saving electromagnetic switch

Abstract

The invention relates to the technical field of electromagnetic switches, in particular to a combined energy-saving electromagnetic switch which comprises a first shell, a movable iron core, a fixed iron core, a coil assembly and a first center shaft and further comprises a connecting plate and a second shell, a cavity is formed in the left end of the first shell, and the movable iron core, the fixed iron core, the coil assembly and the first center shaft are arranged in the cavity of the first shell. The right end of the first shell is provided with a first cavity, the left end of the second shell is provided with a second connecting hole matched with a second bolt with a static contact, and the left end of the first shell and the right end of the second shell are detachably connected through a connecting plate and a fastener. The spring and the abutting piece are arranged on the inner wall of the second shell, when the movable contact makes contact with the static contact, the abutting piece stretches into the lower end of the connecting plate to limit the connecting plate from moving downwards, locking of the movable contact and the connecting contact is achieved, loop closing is not affected even if a coil power source is disconnected, and electric energy is saved.

Description

Technical Field

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

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

[0003] Traditional electromagnetic switches need to remain powered on for a long time to ensure smooth circuits. This approach will lead to the following problems: the coil is continuously powered, causing the coil temperature to rise, accelerating aging, and consuming high energy, which is not energy-saving.

[0004] Traditional electromagnetic switches usually place the shaft, iron core, and contacts in a housing, and use an shaft to complete the movement of the movable iron core and the movable contact. The shaft is inevitably worn during the opening and closing of the switch. When maintenance is required, the entire housing needs to be disassembled to remove the shaft, which will inevitably affect other parts.

[0005] To this end, we propose a combined energy-saving electromagnetic switch. Summary of the invention

[0006] A technical problem to be solved by the present application is that a traditional electromagnetic switch needs to be powered on for a long time to ensure smooth circuit operation. This practice will lead to the following problems: the coil is continuously powered, causing the coil temperature to rise, accelerating aging, and consuming high energy, which is not energy-saving.

[0007] Traditional electromagnetic switches usually place the shaft, iron core, and contacts in a housing, and use an shaft to complete the movement of the movable iron core and the movable contact. The shaft is inevitably worn during the opening and closing of the switch. When maintenance is required, the entire housing needs to be disassembled to remove the shaft, which will inevitably affect other components.

[0008] In order to solve the above technical problems, the embodiment of the present application provides a combined energy-saving electromagnetic switch, including a first housing, a movable iron core, a fixed iron core, a coil assembly, a first central axis, and also includes a connecting plate and a second housing;

[0009] A cavity is provided at the left end of the first shell, and the movable iron core, the fixed iron core, the coil assembly, and the first central axis are provided in the cavity of the first shell;

[0010] The second housing is provided with a first cavity at the right end and a second connection hole matching with a second bolt with a static contact at the left end;

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

[0012] In some embodiments, the coil assembly includes a coil body and a wire frame, the coil body is wound on the wire frame, and the coil assembly is hollow inside.

[0013] In some embodiments, a circular groove is formed at the left end of the movable iron core, and the movable iron core is cylindrical in shape as a whole;

[0014] The interior of the fixed iron core is hollow, and the diameter of the cavity inside 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 a distance is reserved 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 an axis body, the first spring is disposed on the axis body, the second spring is disposed at the left end of the axis body, and the second spring is shorter than 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 shell includes a flange plate, a shell body, and a second protrusion;

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

[0021] The second protrusion is arranged on the left end surface of the shell body, and second connecting holes are symmetrically arranged on both sides of the second protrusion. The second connecting holes are through holes and threads are arranged in the holes.

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

[0023] In some embodiments, a second central axis and a movable plate are disposed in the first cavity at the right end of the second shell;

[0024] The second central axis includes a third spring, a support plate, and a cylindrical shaft, wherein 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 point, and a fourth spring;

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

[0028] A magnet having a different magnetic property from that of the magnet in the support plate is arranged in the movable plate, so that the support plate and the movable plate can be attracted together by magnetic attraction and move left and right along the length direction of the second shell when the coil assembly is powered on and off;

[0029] The positioning groove is used 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 abutting member are provided 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] A magnet with a different magnetic property from that of the magnet in the movable plate and a magnet with a same magnetic property as that of the magnet in the supporting plate are arranged in the abutting piece.

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

[0036] In some embodiments, a plurality of blind hole connection slots having the same size and position as the first connection holes are provided on the left end surface of the first shell, and the cavity diameter of the first shell is larger than the diameter of the coil assembly;

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

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

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

[0040] 1. The movable contact can be locked when in contact with the static contact. By arranging a spring and abutment on the inner wall of the second housing, when the movable contact is not in contact with the static contact, the abutment abuts against the connecting plate with the movable contact; when the movable contact is in contact with the static contact, the abutment extends into the lower end of the connecting plate to limit the downward movement of the connecting plate, thereby locking the movable contact with the connecting contact. Even if the coil power supply is disconnected, the circuit closure is not affected, saving energy.

[0041] 2. The switch device is a modular detachable connection. The first housing and the second housing are detachably connected through a connecting plate and a fastener. When parts of the device 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 This is a schematic diagram of the second shell structure of the present invention;

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

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

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

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

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

[0050] Fig. 9 It is a cross-sectional view of the overall structure of the present invention when the power is turned off for the first time;

[0051] Fig.10 It is a cross-sectional view of the overall structure of the present invention when it is powered on for the second time.

[0052] In the figure: 1-first shell; 2-movable 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 shell; 10-first bolt; 11-second bolt; 31-coil body; 32-wire rack; 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 connecting hole; 92-shell body; 921-second connecting hole; 93-second protrusion; 931-positioning groove; 94-first cavity; 95-abutment; 96-fifth spring; 97-limiting groove; 111-static contact; 112-nut. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0055] Furthermore, the coil assembly 3 includes a coil body 31 and a wire frame 32 . The coil body 31 is wound on the wire frame 32 , and the coil assembly 3 is hollow inside.

[0056] Furthermore, a circular groove is opened at the left end of the movable iron core 2, and the whole is cylindrical. The fixed iron core 5 is hollow inside. The diameter of the internal 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 internal 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.

[0057] Furthermore, the first central axis 4 includes a first spring 41, a second spring 42, and an axle body 43. The first spring 41 is arranged on the axle body 43, and the second spring 42 is arranged at the left end of the axle body 43. The length of the second spring 42 is smaller than 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 diameter of the internal cavity of the fixed iron core 5.

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

[0059] Furthermore, a second central axis 7 and a movable plate 8 are arranged in the first cavity 94 at the right end of the second shell 9. The second central axis 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 with 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. The 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 different magnetic property from the magnet in the support plate 72 is arranged in the movable plate 8, so that the support plate 72 and the movable plate 8 can be adsorbed together due to the magnetic attraction and move left and right along the length direction of the second shell 9 when the coil assembly 3 is powered on and off.

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

[0061] Furthermore, a limiting groove 97 is provided on the inner wall of the second housing 9, and a fifth spring 96 and abutting member 95 are provided 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 abutment member 95 is connected to the fifth spring 96, and the other end of the abutment member 95 abuts against the side of the movable plate 8. When the other end of the abutment member 95 abuts against the side of the movable plate 8, the fifth spring 96 is in a compressed state. A magnet with a different magnetic property from that of the magnet in the movable plate 8 and a magnet with the same magnetic property as that of the magnet in the support plate 72 is provided in the abutment member 95. The purpose is that when the coil assembly 3 is not energized, the abutment member 95 and the movable plate 8 rely on the magnetic attraction generated by the magnets with different magnetic properties to attract each other, connect and abut against each other, and together with the fourth spring 83, ensure that the movable plate 8 is in a balanced state; when the coil assembly 3 is energized for the first time, the first central axis 4 drives the second central axis 7 to move to the left, and the support plate 72 of the second central axis 7 and the movable plate 8 move to the left due to the magnetic attraction force generated by the built-in magnets with different magnetic properties. At this time, the third spring 71 of the second central axis 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 changes from a compressed state due to the third spring 71 of the second central axis 7 8, and the support plate 72 is in the state of being stretched and moved to the right, thereby breaking the contact with the movable plate 8. At this time, the first abutment member 95 extends into the bottom of the movable plate 8 due to the change of the fifth spring 96 state from the compressed state to the stretched state, thereby limiting the movement of the movable plate 8 to the right; when the coil assembly 3 is energized for the second time, the support plate 72 of the second central axis 7 moves to the left due to the first central axis 4 driving the second central axis 7 to contact the bottom of the movable plate 8. At this time, the abutment member 95 extending into the bottom of the movable plate 8 and the magnets with the same magnetic properties as the support plate 72 generate a magnetic repulsion force, so that the abutment member 95 is pushed out of the bottom of the movable plate 8 to the side edge position of the movable plate 8. At this time, the coil assembly 3 is powered off for the second time, and the support plate 72 moves to the right with the movable plate 8. The abutment member 95 just abuts against the side of the movable plate due to the movement of the movable plate to the right, and the fourth spring 83 is connected to the first protrusion 81 of the movable plate 8 to limit the movement of the movable plate 8, which will cause the movable plate 8 to separate from the support plate 72, and the support plate 72 moves to the right to the initial position under the action of the second central axis 7 and the first central axis 4.

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

[0064] Furthermore, the left end face of the first shell 1 is provided with a plurality of blind hole connecting grooves with the same size and position as the first connecting hole 911, the cavity diameter of the first shell 1 is larger than the diameter of the coil assembly 3, the connecting plate 6 is provided with a through hole connecting groove with the same size and position as the first connecting hole 911, the connecting plate 6 is also provided with a through hole guide groove with the same diameter as the first central axis 4, the bottom surface of the cylindrical shaft 73 at the right end of the second central axis 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] Combine the following Figure 1-7 , introduce the device assembly:

[0066] First, the coil assembly 3 is installed into the cavity of the first shell 1, wherein the coil 31 in the coil assembly 3 is wound on the wire frame 32, and then the movable iron core 2 is installed into the bottom of the cavity of the coil assembly 3, and then the fixed iron core 5 is installed into the left end of the cavity of the coil assembly 3, and then the first central axis 4 is extended into the cavity of the fixed iron core 5 and the movable iron core 2, wherein 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 the connecting plate 6 is combined with the first shell 1, wherein the through hole connecting groove of the connecting plate 6 is aligned with the blind hole connecting groove of the first shell 1, and the through hole guide groove of the connecting plate 6 is aligned with the left end face of the first central axis 4.

[0067] Then, the right end face of the cylindrical shaft 73 of the second central axis 7 is connected to the second spring 42, and then the first protrusion 81 in the movable plate 8 is connected to the left end face of the positioning groove 931 of the second shell 9 through the fourth spring 83, and the two ends of the movable plate 8 are abutted against each other with the abutment member 95, the abutment 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, the second bolt 11 is passed through the second connecting hole 921, wherein the static contact point 111 of the second bolt 11 is in the first cavity 94 of the second shell 9, and the nut 112 of the second bolt 11 is outside the left end face of the second shell 9.

[0068] Finally, the right end flange plate 91 of the assembled second shell 9 is docked with the connecting plate 6 and the first shell 1, wherein the first connecting hole 911 of the flange plate 91 is aligned with the through hole connecting groove of the connecting plate 6 and the blind hole connecting groove of the first shell 1, and connected by the first bolt 10, and the whole device is assembled.

[0069] Combine the following Figure 1 , Figure 8-10 , introduces the contact and separation process of the movable contact 82 and the static contact 111 under the condition of power on and off:

[0070] In stage 1, when the coil assembly 3 is not powered, Figure 1 As 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 axis 4 are in a balanced state, the third spring 71 of the second central axis 7 is in a balanced state, the fourth spring 83 on the movable plate 8 is in a balanced state, and the fifth spring 96 in the limiting groove 97 is in a compressed state.

[0071] In stage 2, when the coil assembly 3 is powered on for the first time, 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, Fig. 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 Fig.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, the fourth spring 83 changes from a compressed state to an extended state, pushing the movable plate 8 to move to the right, and the bottom of the movable plate 8 and the supporting plate 72 move together due to magnetic adsorption. When the state of the fourth spring 83 changes from a compressed state to a balanced state, the supporting plate 72 is separated from the bottom of the movable plate 8, and the movable contact 82 is in a separated state from the static contact 111. At this time, the abutment member 95 just abuts against the side of the movable plate 8, and 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, and finally the movable iron core 2 and the first central axis 4 and the second central axis 7 return to the state shown in FIG. Figure 1 original state.

[0076] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A combined energy-saving electromagnetic switch, comprising a first housing (1), a movable iron core (2), a fixed iron core (5), a coil assembly (3), and a first central axis (4), characterized in that: It also includes a connecting plate (6) and a second shell (9); A cavity is provided at the left end of the first shell (1), and 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 shell (1); The second housing (9) is provided with a first cavity (94) at the right end and a second connection hole (921) matching with a second bolt (11) with a static contact (111) at the left end; The left end of the first shell (1) and the right end of the second shell (9) are detachably connected via a connecting plate (6) and a fastener.

2. The combined energy-saving electromagnetic switch according to claim 1 is characterized in that: The coil assembly (3) comprises a coil body (31) and a wire frame (32); the coil body (31) is wound on the wire frame (32); and the coil assembly (3) is hollow inside.

3. The combined energy-saving electromagnetic switch according to claim 2 is characterized in that: The movable iron core (2) has a circular groove at its left end and is cylindrical in shape as a whole; The interior of the fixed iron core (5) is hollow, and the diameter of the internal 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 is characterized in that: The first central axis (4) comprises a first spring (41), a second spring (42), and an axis body (43); the first spring (41) is arranged on the axis body (43); the second spring (42) is arranged at the left end of the axis body (43); and the second spring (42) is shorter than 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 is smaller than the diameter of the internal cavity of the fixed iron core (5).

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

6. The combined energy-saving electromagnetic switch according to claim 5, characterized in that: A second central axis (7) and a movable plate (8) are arranged in the first cavity (94) at the right end of the second shell (9); The second central shaft (7) comprises a third spring (71), a support plate (72), and a cylindrical shaft (73); the third spring (71) is arranged on the cylindrical shaft (73); and the left end of the cylindrical shaft (73) is integrally connected to the support plate (72); A magnet is arranged inside the support plate (72); The movable plate (8) comprises a first protrusion (81), a movable contact point (82), and a fourth spring (83); The movable contacts (82) are symmetrically arranged on both sides of the first protrusion (81), and the fourth spring (83) is arranged on the first protrusion (81); The movable plate (8) is provided with a magnet having a different magnetic property from the magnet in the support plate (72), so that when the coil assembly (3) is powered on or off, the support plate (72) and the movable plate (8) can be attracted together by magnetic attraction and move left and right along the length direction of the second shell (9); The positioning groove (931) functions to determine the position of the first protrusion (81) of the movable plate (8) and the fourth spring (83) disposed 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 6, characterized in that: The inner wall of the second housing (9) is provided with a limiting groove (97), and a fifth spring (96) and 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); One end of the abutting member (95) is connected to the fifth spring (96), and the other end of the abutting member (95) abuts against the side surface of the movable plate (8); When the other end of the abutting member (95) is in abutment with the side surface of the movable plate (8), the fifth spring (96) is in a compressed state; The abutting member (95) is provided with a magnet having a different magnetic property from the magnet in the movable plate (8) and a magnet having the same magnetic property as the magnet in the supporting plate (72).

8. The combined energy-saving electromagnetic switch according to claim 1 is characterized in that: The second bolt (11) comprises a static contact (111) and a nut (112). The second bolt (11) is arranged in the second connecting hole (921). The static contact (111) is located inside the second shell (9). The position of the static contact (111) corresponds to the movable contact (82). The nut (112) is located outside the left end of the second shell (9). The nut (112) is 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 surface of the first shell (1) is provided with a plurality of blind hole connection grooves having the same size and position as the first connection hole (911); the cavity diameter of the first shell (1) is larger than the diameter of the coil assembly (3); The connecting plate (6) is provided with a through hole connecting groove having the same size and position as the first connecting hole (911), and the connecting plate (6) is also provided with a through hole guiding groove having the same diameter as the first central axis (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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