Electromagnetic switch convenient to assemble

Abstract

The utility model relates to the technical field of electromagnetic switches, and discloses an electromagnetic switch convenient to assemble, which comprises an external shell, an installation mechanism is arranged outside the external shell and is used for assisting installation personnel to assemble the electromagnetic switch, and a cooling mechanism is arranged inside the external shell and is used for reducing the temperature inside the switch; the mounting mechanism comprises a positioning column, the positioning column is fixedly connected to the inner wall of the external shell, the outer wall of the positioning column is rotatably connected with a shifting fork, one end of the shifting fork is slidably connected with a movable iron core, and the inner wall of the external shell is fixedly connected with one end of a limiting frame, one end of a first limiting column, one end of a second limiting column, one end of a limiting pier and one end of a fixed pier. The other end of the first limiting column and the other end of the second limiting column are slidably connected with a static iron core. According to the utility model, the mounting mechanism is arranged outside the external shell, so that each component can be quickly positioned and connected according to a specific structure during assembly, and the assembly time and difficulty are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic switch especially relates to an electromagnetic switch convenient to assemble. BACKGROUND

[0002] The electromagnetic switch is the control switch on the starter, and is one of three components of the starter, and the working principle is that electromagnetic attraction is generated after the coil is electrified, moves the movable iron core, thereby on one hand pulls the transmission meshing mechanism to make the starter pinion gear forward and meshes with the engine flywheel gear ring, and on the other hand pushes the switch contact to connect, makes the DC motor electrified and runs, thereby drives the engine to start.

[0003] Through the retrieval, the utility model discloses a kind of electromagnetic switch protection device, including: intermediate shell, top shell and bottom sealing plate, top shell is installed at the top of intermediate shell, bottom sealing plate is installed at the bottom of intermediate shell, the top and bottom of the outside of intermediate shell are fixedly installed with limit ring, the outside of intermediate shell is fixedly installed with rubber column, and the end of rubber column away from intermediate shell is fixedly installed with protection sleeve;When electromagnetic switch operates and directly collides with external equipment when vibrating or, collision object first contacts with rubber sleeve, rubber sleeve first buffers impact force, protects intermediate shell, then impact force can push rubber sleeve and protection sleeve to move, and extrude rubber column, so that rubber column is deformed, thereby buffering impact force is realized.

[0004] However, this application will enter short-circuit state in the process of using due to the attraction coil in electromagnetic switch after starting work for a period of time, emits a large amount of heat, at this time, the rubber pad covered outside can hinder switch heat dissipation, and long-time work can greatly reduce the service life of switch. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a kind of electromagnetic switch convenient to assemble, to improve the problem of inconvenient assembly and too high temperature in switch in prior art.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme: a kind of electromagnetic switch convenient to assemble, including external shell, the outside of the external shell is provided with mounting mechanism, it is used to assist installation personnel to assemble electromagnetic switch, the inside of the external shell is provided with cooling mechanism, it is used to reduce the temperature inside switch;

[0007] The mounting mechanism comprises a positioning column fixedly connected to the inner wall of the external shell, a shift fork rotationally connected to the outer wall of the positioning column, a moving iron core slidingly connected to one end of the shift fork, a limiting frame, a limiting column one, a limiting column two, a limiting block and one end of a fixing block fixedly connected to the inner wall of the external shell, the other end of the limiting column one and the limiting column two slidingly connected to a static iron core, the other end of the outer wall of the limiting block slidingly connected to a contact disc, and the other end of the outer wall of the fixing block fixedly connected to a 30 terminal, a 50 terminal and a C terminal.

[0008] As a further description of the above technical solution: the cooling mechanism comprises a shielding cover fixedly connected to the outer wall of the external shell, the shielding cover is internally communicated with a gas pump, the input end of the gas pump is communicated with the outside world, the output end of the gas pump is communicated with one end of a cooling pipe, the inner wall of the external shell is fixedly connected with a limiting clamp, the cooling pipe is wrapped around the inside of the external shell through the limiting clamp, the outer wall of the external shell is communicated with an air outlet, and one end of the cooling pipe is communicated with the air outlet.

[0009] As a further description of the above technical solution: one end of the limiting frame, the limiting column one and the limiting column two is provided with a limiting groove, and the limiting groove is semicircular.

[0010] As a further description of the above technical solution: a return spring is arranged between the shift fork and the limiting frame, and the return spring is wrapped around the outer wall of the moving iron core.

[0011] As a further description of the above technical solution: the limiting frame, the limiting column one and the limiting column two are at the same distance from the outer wall of the external shell, the center point of the contact disc is at the same height as the axis of the static iron core, and the outer wall side of the 30 terminal and the C terminal is located on the same vertical line.

[0012] As a further description of the above technical solution: the outer wall of the limiting column one and the limiting column two is provided with a wire fixing groove.

[0013] As a further description of the above technical solution: the outer wall of the static iron core is wound with a pull coil and a holding coil.

[0014] The utility model has the following beneficial effects:

[0015] 1、The utility model discloses an external shell is provided with mounting mechanism on the outside, so that each component can be quickly positioned and connected according to the specific structure during assembly, effectively reducing the assembly time and difficulty. The sliding connection of the moving iron core and the shift fork, the cooperation of the static iron core and the limiting column greatly simplify the assembly process, make the assembly work more efficient, especially in large-scale production, which can reduce labor cost and improve production efficiency.

[0016] 2、The utility model discloses a cooling mechanism is designed for the electromagnetic switch long -time stable operation provides strong support. The air pump extracts the outside air circulation in the shell through the cooling pipe, carries away the heat generated in work, and the limiting clamp guides the air flow direction and ensures that the heat dissipation is uniform. Effectively avoid the damage of component because of overheating, such as coil insulating layer aging, contact ablation etc. problem, greatly prolong the service life of electromagnetic switch, reduce equipment maintenance and replacement frequency, reduce the use cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional view of the electromagnetic switch convenient to assemble is provided for the utility model;

[0018] Figure 2 A display view of the electromagnetic switch convenient to assemble is provided for the utility model;

[0019] Figure 3 A schematic view of the electromagnetic switch convenient to assemble is provided for the utility model.

[0020] LEGEND:

[0021] 1, external shell;2, positioning column;3, fork;4, moving iron core;5, limiting frame;6, limiting column one;7, limiting column two;8, limiting mound;9, fixed mound;10, static iron core;11, contact disc;12, 30 terminal;13, 50 terminal;14, C terminal;15, shield cover;16, air pump;17, limiting clamp;18, air outlet;19, limiting groove;20, return spring;21, wire fixing groove;22, cooling pipe. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] REFERENCE Figures 1-3The utility model provides an embodiment: a kind of electromagnetic switch of easy assembly, including external shell 1, the outside of external shell 1 is provided with mounting mechanism, it is used to assist installation personnel to assemble electromagnetic switch, the inside of external shell 1 is provided with cooling mechanism, it is used to reduce the temperature inside switch;Mounting mechanism includes positioning column 2, positioning column 2 is fixedly connected in the inner wall of external shell 1, the outer wall of positioning column 2 is rotatably connected with yoke 3, one end of yoke 3 is slidably connected with moving iron core 4, the inner wall of external shell 1 is fixedly connected with limit frame 5, limit column one 6, limit column two 7, limit pier 8 and the one end of fixed pier 9 respectively, the other end of limit column one 6 and limit column two 7 is slidably connected with static iron core 10, the outer wall other end of limit pier 8 is slidably connected with contact disc 11, the outer wall other end of fixed pier 9 is fixedly connected with 30 terminal 12, 50 terminal 13 and C terminal 14.

[0024] Limit slot 19 is half-round and is formed in one end of limit frame 5, limit column one 6 and limit column two 7.

[0025] Return spring 20 is arranged between yoke 3 and limit frame 5, and return spring 20 is wrapped around the outer wall of moving iron core 4.

[0026] The distance from limit frame 5, limit column one 6 and limit column two 7 to the outer wall of external shell 1 is the same, the center point of contact disc 11 and the axis of static iron core 10 are at the same height, and the outer wall side of 30 terminal 12 and C terminal 14 is located on the same vertical line.

[0027] Wire fixing groove 21 is formed in the outer wall of limit column one 6 and limit column two 7.

[0028] The outer wall of static iron core 10 is wound with suction coil and holding coil

[0029] Reference Figure 2 And Figure 3, specifically, when the electromagnetic switch starts working, the suction coil and the holding coil are restrained by the fixed slot 21 on the outer wall of the static core 10, and the current passes through the suction coil and the holding coil wound on the outer wall of the static core 10 to generate a magnetic field. The magnetic field causes the moving core 4 to be affected by electromagnetic force. In the initial state, the return spring 20 is in a natural stretched state and has a certain supporting force on the moving core 4. When the electromagnetic force is large enough, the elastic force of the return spring 20 is overcome, and the moving core 4 starts to slide along the guide of the pawl 3. The movement of the moving core 4 drives the pawl 3 to rotate around the positioning column 2. Because the pawl 3 is slidably connected with the moving core 4, this rotation is converted into linear motion of the moving core 4, and with the movement of the moving core 4, it pushes the static core 10 to slide on the limiting column one 6 and the limiting column two 7, and the semicircular limiting slot 19 opened at one end of the limiting column one 6 and the limiting column two 7 and the sliding connection with the static core 10 ensure the directionality and stability of the movement of the static core 10. During the sliding process of the static core 10, the change of its position will affect the distribution and strength of the magnetic field inside the electromagnetic switch. At the same time, the movement of the static core 10 drives the contact disc 11 to slide on the limiting column 8. The sliding of the contact disc 11 changes the contact state between the contact disc 11 and the 30 terminal 12, the 50 terminal 13 and the C terminal 14. When the contact disc 11 moves to the appropriate position, it is in contact with the corresponding terminal, realizing the conduction or disconnection of the circuit, thereby controlling the working state of the external equipment, for example, in the automobile starter system, when the electromagnetic switch is turned on, the current passes through the contact disc 11 and the corresponding terminal to provide power for the starter, so that the starter operates to drive the engine to start. In this process, the components of the electromagnetic switch work cooperatively to accurately control the on-off of the circuit.

[0030] When the electromagnetic switch stops working, the current in the suction coil and the holding coil disappears, and the electromagnetic force also disappears. The return spring 20 releases the elastic potential energy and pushes the moving core 4 back to the initial position. The resetting of the moving core 4 drives the pawl 3 to rotate in the opposite direction, and the static core 10 and the contact disc 11 also return to the initial position under the limitation of the corresponding structure, the contact disc 11 is disconnected from the terminal, and the circuit returns to the initial state, completing a working cycle and waiting for the next start instruction.

[0031] The cooling mechanism includes a shielding cover 15 fixedly connected to the outer wall of the external shell 1, the inside of the shielding cover 15 is communicated with a gas pump 16, the input end of the gas pump 16 is communicated with the outside, the output end of the gas pump 16 is communicated with one end of a cooling pipe 22, the inner wall of the external shell 1 is fixedly connected with a limiting clamp 17, the cooling pipe 22 is wrapped around the inside of the external shell 1 through the limiting clamp 17, the outer wall of the external shell 1 is communicated with an air outlet 18, and one end of the cooling pipe 22 is communicated with the air outlet 18.

[0032] Reference Figure 1 and Figure 2Specifically, during the operation of the electromagnetic switch, heat is generated, at which time the cooling mechanism begins to function. The air pump 16 is started to draw air from the outside, which enters the inside of the external shell 1 through the air pump 16 and the cooling pipe 22. The limiting clamp 17 on the inner wall of the external shell 1 can guide the flow direction of the air, so that it is in full contact with the components inside the electromagnetic switch that generate heat, and carries away the heat. The heated air flows out through the air outlet 18 on the outer wall of the external shell 1 and returns to the cooling circulation system in the outside, thereby ensuring that the temperature inside the electromagnetic switch is within a suitable range, ensuring its stable operation and prolonging its service life.

[0033] Working principle: When the electromagnetic switch starts to work, the suction coil and the holding coil are restrained by the fixed wire groove 21 on the outer wall of the static iron core 10. The current passes through the suction coil and the holding coil wound on the outer wall of the static iron core 10 to generate a magnetic field. The magnetic field causes the moving iron core 4 to be subjected to electromagnetic attraction. In the initial state, the return spring 20 is in a natural stretched state and has a certain supporting force on the moving iron core 4. When the electromagnetic attraction is large enough, it overcomes the elastic force of the return spring 20, and the moving iron core 4 starts to slide along the guide of the yoke 3. The movement of the moving iron core 4 drives the yoke 3 to rotate around the positioning column 2. Since the yoke 3 is slidingly connected with the moving iron core 4, this rotation is converted into linear motion of the moving iron core 4. With the movement of the moving iron core 4, it pushes the static iron core 10 to slide on the limiting column one 6 and the limiting column two 7. The semicircular limiting groove 19 opened at one end of the limiting column one 6 and the limiting column two 7 and their sliding connection with the static iron core 10 ensure the directionality and stability of the movement of the static iron core 10. During the sliding process of the static iron core 10, the change of its position will affect the distribution and strength of the magnetic field inside the electromagnetic switch. At the same time, the movement of the static iron core 10 drives the contact disc 11 to slide on the limiting mound 8. The sliding of the contact disc 11 changes the contact state between it and the 30 terminal 12, the 50 terminal 13 and the C terminal 14. When the contact disc 11 moves to the appropriate position, it is in contact with the corresponding terminal, realizing the conduction or disconnection of the circuit, thereby controlling the working state of the external equipment. For example, in the automobile starter system, when the electromagnetic switch is turned on, the current passes through the contact disc 11 and the corresponding terminal to provide power for the starter, so that the starter operates to drive the engine to start. In this process, the components of the electromagnetic switch work cooperatively to accurately control the on-off of the circuit.

[0034] When the electromagnetic switch stops working, the current in the suction coil and the holding coil disappears, and the electromagnetic attraction also disappears. The return spring 20 releases the elastic potential energy to push the moving iron core 4 back to the initial position. The resetting of the moving iron core 4 drives the yoke 3 to rotate in the opposite direction, and the static iron core 10 and the contact disc 11 also return to the initial position under the limitation of the corresponding structures. The contact disc 11 is disconnected from the terminal, and the circuit returns to the initial state, completing a working cycle and waiting for the next start instruction.

[0035] In the working process of the electromagnetic switch, heat is generated, at which time the cooling mechanism starts to play a role. The air pump 16 is started to draw air from the outside, which enters the inside of the external shell 1 through the air pump 16 and the cooling pipe 22. The limiting clip 17 on the inner wall of the external shell 1 can guide the flow direction of the air, so that it is fully in contact with the heat-generating components inside the electromagnetic switch to take away the heat. The heated air flows out through the air outlet 18 on the outer wall of the external shell 1 and returns to the cooling circulation system in the outside world, thereby ensuring that the internal temperature of the electromagnetic switch is within a suitable range, ensuring its stable operation and prolonging the service life.

[0036] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An electromagnetic switch, of the type comprising an outer casing (1), characterized in that: The external shell (1) is externally provided with a mounting mechanism for assisting the installation personnel to assemble the electromagnetic switch, and is internally provided with a cooling mechanism for reducing the temperature inside the switch; The mounting mechanism comprises a positioning column (2) fixedly connected to the inner wall of the external shell (1), a shift fork (3) rotationally connected to the outer wall of the positioning column (2), and a moving iron core (4) slidingly connected to one end of the shift fork (3). The inner wall of the external shell (1) is fixedly connected to one end of a limiting frame (5), a limiting column one (6), a limiting column two (7), a limiting block (8), and a fixed block (9), respectively. The other end of the limiting column one (6) and the limiting column two (7) is slidingly connected to a static iron core (10), the other end of the outer wall of the limiting block (8) is slidingly connected to a contact disc (11), and the other end of the outer wall of the fixed block (9) is fixedly connected to a 30 terminal (12), a 50 terminal (13), and a C terminal (14).

2. An electromagnetic switch according to claim 1, characterized in that: The cooling mechanism comprises a shielding cover (15) fixedly connected to the outer wall of the external shell (1), a gas pump (16) in communication with the inside of the shielding cover (15), an input end of the gas pump (16) in communication with the outside, and an output end of the gas pump (16) in communication with one end of a cooling pipe (22). The inner wall of the external shell (1) is fixedly connected to a limiting clamp (17), the cooling pipe (22) is surrounded inside the external shell (1) through the limiting clamp (17), the outer wall of the external shell (1) is in communication with an air outlet (18), and one end of the cooling pipe (22) is in communication with the air outlet (18).

3. An electromagnetic switch according to claim 1, wherein: The limiting frame (5), the limiting column one (6), and the limiting column two (7) are provided with a limiting groove (19) at one end thereof, and the limiting groove (19) is semicircular.

4. An electromagnetic switch according to claim 1, wherein: A return spring (20) is arranged between the shift fork (3) and the limiting frame (5), and the return spring (20) is wrapped around the outer wall of the moving iron core (4).

5. An electromagnetic switch according to claim 1, characterized in that: The limiting frame (5), the limiting column one (6), and the limiting column two (7) are at the same distance from the outer wall of the external shell (1), the center point of the contact disc (11) is at the same height as the axis of the static iron core (10), and the outer wall of the 30 terminal (12) and the C terminal (14) are located on the same vertical line.

6. An electromagnetic switch for easy assembly according to claim 1, characterized in that: The outer wall of the limiting column one (6) and the limiting column two (7) is provided with a wire fixing groove (21).

7. An electromagnetic switch according to claim 1, wherein: The outer wall of the static iron core (10) is wrapped with a pull coil and a holding coil.

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