starter solenoid

Abstract

The utility model relates to the technical fields of electromagnetic switch especially relates to a starter electromagnetic switch, it improves the life, static core sets up between the movable core and copper contact piece, is provided with return spring between static core and movable core, static core and copper contact piece respectively, the switch winding is sleeved on the outside of movable core, the switch shell is sleeved on the outside of switch winding 3, static core and bakelite cover fixed connection, respectively be provided with wiring stake, L type binding post and 50 post on the bakelite cover, the switch winding has the electromagnetic coil and is coiled, the electromagnetic coil is constituted by the holding coil and the suction coil, the holding coil with the suction coil is two groups of independent coils, the suction coil initial end connects 50 post, the tail end of suction coil is connected with copper wiring stake, the holding coil initial end is separated from the bakelite cover and is connected with L type binding post, the holding coil tail end is welded with static core.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic switches, and in particular to starter electromagnetic switches. Background Technology

[0002] Traditional car engine electromagnetic switches consist of two sets of coils connected together at the beginning to a 50-pin terminal. The end of the pull coil is connected to a copper terminal on a bakelite cap, which in turn connects to the positive input wire of the starter motor. Another copper terminal on the bakelite cap connects to the positive input wire of the battery. The end of the hold coil is connected to the switch's ground core. The drawback of this design is that both sets of coils must have the same number of turns. This is because after the car starts, before the contacts inside the electromagnetic switch return to their original positions, the two copper terminals are still connected. Therefore, the positive current flows through the pull coil to the hold coil and then to the negative terminal, creating two electromagnetic fields in different directions. Since the two coils have the same number of turns, they cancel each other out, allowing the ground core to retract smoothly and completing the start-up process.

[0003] The holding coil and pull coil are mutually restrained because the number of turns must be the same. A larger current is needed for the pull coil to work well. The conditions for generating a large current are: 1. Increase the wire diameter; 2. Reduce the number of turns in the pull coil. However, due to the size limitation of the switch housing, increasing the wire diameter is not feasible. 2. If the number of turns in the pull coil is reduced, then the number of turns in the holding coil must also be reduced (because the number of turns must be the same). This increases the current in the holding coil. When the starter motor starts, the holding coil is used most of the time. After the switch is closed, the pull coil stops working because the positive terminal is short-circuited and the negative terminal is broken. The holding coil is prone to burning out due to the large current for a long time. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a starter electromagnetic switch with improved service life.

[0005] This utility model discloses a starter electromagnetic switch, comprising a moving iron core, a return spring, a switch winding, a bakelite cover, a switch housing, copper contact plates, terminals, a stationary iron core, L-shaped terminals, and 50-pin terminals. The stationary iron core is disposed between the moving iron core and the copper contact plates. Return springs are respectively disposed between the stationary iron core and the moving iron core, and between the stationary iron core and the copper contact plates. The switch winding is fitted around the outside of the moving iron core, and the switch housing is fitted around the outside of the switch winding. The stationary iron core is fixedly connected to the bakelite cover. Terminals, L-shaped terminals, and 50-pin terminals are respectively disposed on the bakelite cover. The switch winding is formed by an electromagnetic coil, which consists of a holding coil and a pull coil. The holding coil and the pull coil are two independent coils. The initial end of the pull coil is connected to the 50-pin terminal, and the tail end of the pull coil is connected to the copper terminal. The initial end of the holding coil extends separately from the bakelite cover and is connected to the L-shaped terminal. The tail end of the holding coil is welded to the stationary iron core.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, because the beginnings of the pull coil and the holding coil are separated, forming two independent coils, after the locomotive starts and before the electromagnetic switch is completely disconnected, the positive current of the pull coil will no longer flow to the negative terminal through the holding coil, thus eliminating mutual interference. The positions of the beginning and end of the pull coil remain unchanged. The beginning of the holding coil is separately fixed to a separate terminal added later on the bakelite cover, while the end remains unchanged and is welded to the stationary iron core (ground). In this way, the pull coil can arbitrarily reduce the number of turns and increase the current as needed, while the holding coil can... The number of turns can be increased arbitrarily as needed. (Magnetic field strength is directly proportional to current and number of turns; the greater the current and the more turns, the greater the magnetic field strength. Current is inversely proportional to number of turns; for the same wire diameter, the more turns, the smaller the current, and the less heat is generated.) This improvement provides a larger current to the pull coil and increases the number of turns in the holding coil diagram. Here, the positive power supply for the larger current of the pull coil is provided by the output of the high-power relay that comes with the starter motor, while the positive power supply for the smaller current of the holding coil is provided by the ignition key switch connected in parallel to the input line of the high-power relay. Attached Figure Description

[0007] Figure 1 This is an exploded structural diagram of the present invention;

[0008] Figure 2 This is an enlarged structural diagram of the retaining coil and pull-in coil, etc.

[0009] The following are labels in the attached diagram: 1. Moving iron core; 2. Return spring; 3. Switch winding; 4. Bakelite cover; 5. Switch housing; 6. Copper contact piece; 7. Terminal block; 8. Stationary iron core; 9. L-shaped terminal block; 10. 50-position terminal block; 11. Holding coil; 12. Pull-in coil. Detailed Implementation

[0010] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0011] Example

[0012] This utility model discloses a starter electromagnetic switch, comprising a moving iron core 1, a return spring 2, a switch winding 3, a bakelite cover 4, a switch housing 5, a copper contact piece 6, a terminal block 7, a stationary iron core 8, an L-shaped terminal block 8, and a 50-pin terminal block 10. The stationary iron core 8 is disposed between the moving iron core 1 and the copper contact piece 6. Return springs 2 are respectively disposed between the stationary iron core 8 and the moving iron core 1, and between the stationary iron core 8 and the copper contact piece 6. The switch winding 3 is fitted onto the outside of the moving iron core 1, and the switch housing 5 is fitted onto the outside of the switch winding 3. The stationary iron core... 8 is fixedly connected to the bakelite cover 4. The bakelite cover 4 is respectively provided with terminal block 7, L-shaped terminal block 9 and 50 terminal block 10. The switch winding 3 is wound with an electromagnetic coil. The electromagnetic coil consists of a holding coil and a pull coil. The holding coil and the pull coil are two independent coils. The initial end of the pull coil is connected to the 50 terminal block 10, and the tail end of the pull coil is connected to the copper terminal block 7. The initial end of the holding coil comes out separately from the bakelite cover 4 and is connected to the L-shaped terminal block 9. The tail end of the holding coil is welded to the stationary iron core 8.

[0013] In this embodiment, during use, since the beginnings of the pull-in coil and the holding coil are separated, forming two independent coils, after the locomotive starts and before the electromagnetic switch is completely disconnected, the positive current of the pull-in coil will no longer flow to the negative terminal through the holding coil, thus no longer mutually restraining each other. The positions of the beginning and end of the pull-in coil remain unchanged. The beginning of the holding coil is separately fixed to a separate terminal added later on the bakelite cover, while the end remains unchanged and is also soldered to the stationary iron core (ground). In this way, the pull-in coil can arbitrarily reduce the number of turns and increase the current as needed, and the holding coil can be adjusted as required. The intention is to increase the number of turns (the magnetic field strength is directly proportional to the current and the number of turns; the larger the current and the more turns, the stronger the magnetic field strength. The current is inversely proportional to the number of turns; for the same wire diameter, the more turns, the smaller the current, and the less heat is generated). This improvement provides a larger current to the pull-in coil and increases the number of turns in the holding coil diagram. Here, the positive power supply for the larger current of the pull-in coil is provided by the output of the high-power relay that comes with the starter motor, while the positive power supply for the smaller current of the holding coil is provided by the ignition key switch connected in parallel to the input line of the high-power relay.

[0014] This invention relates to a starter electromagnetic switch that can be used in situations where starting is difficult due to insufficient battery voltage in extremely cold weather, increased starter temperature (around 80 degrees Celsius) caused by heat transfer from the car engine, increased internal resistance of the switch's electromagnetic wire, or aging wiring. The large pull current allows the electromagnetic switch to close smoothly. After closure, the pull coil is short-circuited, and the high number of turns in the holding coil ensures strong insulation. The low current prevents the switch from burning out, thus extending the overall lifespan of the electromagnetic switch. The pull coil (thick wire) has fewer turns, while the holding coil (thin wire) has more turns, resulting in reduced copper usage, material savings, and a more environmentally friendly design.

[0015] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A starter solenoid switch, characterized in that, The switch includes a moving iron core (1), a return spring (2), a switch winding (3), a bakelite cover (4), a switch housing (5), copper contact pieces (6), terminal blocks (7), a stationary iron core (8), L-shaped terminal blocks (9), and 50-pin terminals (10). The stationary iron core (8) is located between the moving iron core (1) and the copper contact pieces (6). Return springs (2) are respectively installed between the stationary iron core (8) and the moving iron core (1) and between the stationary iron core (8) and the copper contact pieces (6). The switch winding (3) is fitted on the outside of the moving iron core (1), and the switch housing (5) is fitted on the outside of the switch winding (3). The stationary iron core (8) is fixedly connected to the bakelite cover (4). The bakelite cover (4) is provided with a terminal block (7), an L-shaped terminal block (9) and a 50-pin (10). The switch winding (3) is wound with an electromagnetic coil. The electromagnetic coil consists of a holding coil and a pull coil. The holding coil and the pull coil are two independent coils. The initial end of the pull coil is connected to the 50-pin (10), and the tail end of the pull coil is connected to the copper terminal block (7). The initial end of the holding coil comes out separately from the bakelite cover (4) and is connected to the L-shaped terminal block (9). The tail end of the holding coil is welded to the stationary iron core (8).

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