An engine starting relay

Abstract

The utility model discloses an engine starting relay, including the core subassembly, bridging piece and static contact, the core subassembly includes the core to the insulating spacer of setting at the top of core, and the core is pressed to the first spring, and the static contact sets up at the insulating spacer periphery side, bridging piece sets up on the insulating spacer and is located static contact top, bridging piece includes the upper surface and lower surface that are parallel to each other, and bridging piece has the through -hole of going through upper surface and lower surface, and the through -hole is set on the guide pillar and is pressed to the second spring of guide pillar. The utility model can reduce the cost, reduce processing difficulty and work hours, improve the machining precision of part, improve the reliability of attraction.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to an engine starting relay. Background Technology

[0002] The main function of the engine starter relay is to convert the small current from the ignition switch (or start button) into a large current capable of driving the starter motor and ignition coil, thus enabling the engine to start smoothly. During operation, the iron core assembly, under the influence of electromagnetic attraction in the magnetic circuit, lifts or releases the bridging plate (moving contact) to conduct electricity, controlling the large current of the starter motor power supply. The insulating gasket provides insulation between the bridging plate and the iron core and housing. Existing bridging plates are U-shaped and require stretching. Due to the deep-drawing structure of the bridging plate, material consumption is high, material costs are high, the process is complex, and labor time is increased. To achieve the flat-topped hat shape, a larger area of ​​copper plate needs to be pre-drawn. After drawing out the dome-shaped hat, the top plane is shaped, and finally, the edges are trimmed, consuming more copper and involving more processing steps, increasing costs. Secondly, because the bridging plate is a deep cold-drawing process, the copper plate needs to be preheated, increasing energy consumption and increasing processing difficulty by preventing overheating and oxidation of the copper plate. In addition, the cold stretching process can easily cause internal lattice fractures in the metal, forming hidden damage. Under long-term external force (the pushing of the iron core and the action of the return spring), it is easy to break, causing the protruding part of the bridging piece to fall off. The small return spring at the top has no pushing fulcrum, and the bridging piece (moving contact) cannot return to contact the stationary terminal (stationary contact), causing the relay to fail. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems of existing bridging plates being difficult to process and relays having poor durability.

[0004] To achieve the objectives of this utility model, the following technical solution is adopted:

[0005] An engine starting relay includes a core assembly, a bridging plate, and a stationary contact. The core assembly includes a core and an insulating pad disposed above the core. The core is pressed against a first spring. The stationary contact is disposed around the insulating pad. The bridging plate is disposed on the insulating pad and above the stationary contact. The bridging plate includes an upper surface and a lower surface that are parallel to each other. The bridging plate has a through hole that penetrates the upper and lower surfaces. The through hole is sleeved on a guide post and pressed against a second spring.

[0006] In some embodiments, the bridging piece is flat, with both the upper and lower surfaces being planar, and the insulating pad is located in the gap between the stationary contacts. In the engaged state, the bridging piece is in contact with the stationary contacts; in the released state, the bridging piece is detached from the stationary contacts.

[0007] In some embodiments, the insulating pad has a base and a protrusion disposed on the base, the top surface of the protrusion having a groove corresponding to the through hole and the guide post.

[0008] In some embodiments, the iron core has a mating groove, and the base is disposed in the mating groove.

[0009] In some embodiments, the height of the protrusion is 5.7 ± 0.1 mm.

[0010] In some embodiments, the iron core, insulating gasket, bridging plate, and guide post are coaxially arranged.

[0011] In some embodiments, the insulating gasket is made of LCP material and is formed by injection molding, and the bridging piece is formed by cold heading extrusion in one step.

[0012] In some embodiments, the outer side of the iron core is provided with a frame, the first spring is vertically disposed between the iron core and the frame, and the bottom of the iron core is provided with a first magnetic sheet.

[0013] In some embodiments, a second magnetic sheet is provided above the skeleton, and the second magnetic sheet is disposed around the iron core.

[0014] In some embodiments, the second magnetic sheet is provided with a base plate, and the stationary contact is disposed on the base plate.

[0015] The engine starter relay provided by this utility model has the following advantages:

[0016] This invention employs a planar bridging piece, reducing overall cost and processing difficulty, increasing the finished product qualification rate, and lowering the risk of defective products. It also improves the machining accuracy of parts, reducing dimensional fluctuations from the original 0.2 mm range to within 0.1 mm, thereby enhancing the reliability of the engagement under the same voltage. The top of the insulating pad uses a groove and high-protrusion structure, replacing the copper riveting structure of the bridging piece, reducing copper material consumption and lowering costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an engine starter relay in the released state provided by an embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the bridging piece provided in an embodiment of the present invention.

[0020] Figure 3 This is a utility model Figure 2 A schematic diagram of section AA.

[0021] Figure 4 This is a schematic diagram of the insulating pad provided in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the iron core assembly provided in an embodiment of the present utility model.

[0023] Figure 6 This is a utility model Figure 5 A schematic diagram of the BB section.

[0024] In the attached diagram: 1. Bridging plate; 2. Stationary contact; 3. Iron core; 4. Insulating pad; 5. Guide post; 6. Second spring; 7. First spring; 8. Frame; 9. First magnetic conductor; 10. Second magnetic conductor; 20. Base plate; 30. Housing; 11. Upper surface; 12. Lower surface; 13. Through hole; 21. Gap; 31. Notch; 32. Rivet part; 41. Foot; 42. Protrusion; 43. Groove; 81. Coil. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0026] In this embodiment, "several" and "more than" refer to two or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figures 1 to 6 As shown, this embodiment provides an engine starter relay, including a core assembly, a bridging piece 1, and a stationary contact 2. The core assembly includes a core 3 and an insulating pad 4 disposed above the core 3. The core 3 presses against a first spring 7, which is used to reset the bridging piece 1. The stationary contact 2 is disposed around the insulating pad 4. The bridging piece 1 is disposed on the insulating pad 4 and located above the stationary contact 2. The insulating pad serves to insulate the bridging piece from the core 3 and the housing 30. The bridging piece 1 is movable, equivalent to a moving contact. The bridging piece 1 includes a parallel upper surface 11 and a lower surface 12. The bridging piece 1 has a through hole 13 penetrating the upper and lower surfaces. The through hole 13 is sleeved on a guide post 5 and presses against a second spring 6. The second spring 6 is sleeved on the guide post 5 and is used to reset the core 3. The first spring 7 and the second spring 6 are coaxially arranged. The cooperation between the through hole 13 and the guide post 5 achieves precise guidance of the bridging piece 1 and avoids movement deviation. The iron core assembly, under the influence of electromagnetic attraction in the magnetic circuit, lifts or releases the bridging plate 1, causing it to engage or disengage with the stationary contact 2, thus controlling the high current of the starter power supply. The dual-spring structure provides stable elastic forces to both the iron core and the bridging plate, ensuring smooth, uninterrupted movement. The parallel design of the upper and lower surfaces of the bridging plate ensures contact with the stationary contact, and the uniform overall thickness reduces material consumption, processing costs, and manufacturing complexity, facilitating increased production and reduced costs.

[0029] Specifically, the bridging piece 1 is flat, with both the upper surface 11 and the lower surface 12 being planar. The insulating gasket 4 is located in the gap 21 between the stationary contacts 2. In the engaged state, the bridging piece 1 is in contact with the stationary contacts 2; in the released state, the bridging piece 1 is detached from the stationary contacts 2. The flat bridging piece 1 is formed in one step by cold forging using a mold, replacing the stretching and stamping process. This reduces labor time and dimensional tolerances and fluctuations caused by operation and equipment, improving the tolerance from within ±0.1 to within ±0.05. The insulating gasket 4 is made of LCP material and is injection molded, solving the problems of inconsistent dimensions and edge burrs. LCP is a liquid crystal polymer plastic with a heat distortion temperature of 275℃, ensuring the temperature resistance requirement (180℃) of the relay node. By using injection molding, the required thickness tolerance of the relay is achieved through high-precision mold dimensions, improving the consistency from ±0.1 to ±0.05, and increasing the thickness tolerance to CPK1.4.

[0030] Furthermore, the insulating pad 4 has a base 41 and a protrusion 42 on the base 41. The base 41 is used to abut against the iron core 3. The top surface of the protrusion 42 has a groove 43, which corresponds to the through hole 13 and the guide post 5. The top groove 43 makes room for the first spring and the guide post. The protrusion 42 replaces the copper riveting structure of the bridging piece, reducing copper material consumption and cost. The height of the protrusion is 5.7±0.1mm. The insulating pad 4 is placed into the recess 31 of the iron core 3 and riveted to form a riveted part 32, forming the iron core assembly. In this embodiment, four riveted parts 32 are formed at 90° intervals, making the insulating pad 4 more stable and preventing the insulating pad from loosening, which would lead to poor overtravel value, poor electrical performance, poor contact, and product ablation. The iron core has a mating groove, and the base is set in the mating groove. The iron core 3, insulating pad 4, bridging plate 1 and guide post 5 are coaxially arranged. The coaxial layout makes the force direction of each component consistent with the movement direction, reducing mechanical friction and jamming, and extending the service life of the mechanical structure. At the same time, it optimizes the transmission path of electromagnetic force, ensures that the bridging plate is subjected to uniform force, and improves the stability of attraction and reset.

[0031] Furthermore, a frame 8 is provided on the outer side of the iron core 3, and a first spring 7 is vertically arranged between the iron core 3 and the frame 8. A coil 81 is wound on the frame 8, and a first magnetic conductive sheet 9 is provided at the bottom of the iron core 3. A second magnetic conductive sheet 10 is provided above the frame 8 and is arranged around the iron core 3. A base plate 20 is provided on the second magnetic conductive sheet 10, and a stationary contact 2 is arranged on the base plate 20. The closed-loop magnetic circuit design reduces magnetic leakage, improves electromagnetic conversion efficiency, and ensures the reliability of the relay's engagement.

[0032] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. An engine starter relay, characterized in that, The device includes a core assembly, a bridging plate, and a stationary contact. The core assembly includes a core and an insulating pad disposed above the core. The core is pressed against a first spring. The stationary contact is disposed around the insulating pad. The bridging plate is disposed on the insulating pad and above the stationary contact. The bridging plate includes an upper surface and a lower surface that are parallel to each other. The bridging plate has a through hole that penetrates the upper and lower surfaces. The through hole is sleeved on a guide post and pressed against a second spring on the guide post.

2. The engine starter relay according to claim 1, characterized in that, The bridging piece is flat, with both its upper and lower surfaces being planar. The insulating pad is located in the gap between the stationary contacts. In the engaged state, the bridging piece is in contact with the stationary contacts; in the released state, the bridging piece is detached from the stationary contacts.

3. The engine starter relay according to claim 2, characterized in that, The insulating pad has a base and a protrusion on the base. The top surface of the protrusion has a groove, which is corresponding to the through hole and the guide post.

4. The engine starter relay according to claim 3, characterized in that, The iron core has a mating groove, and the base is disposed in the mating groove.

5. The engine starter relay according to claim 4, characterized in that, The height of the protrusion is 5.7 ± 0.1 mm.

6. The engine starter relay according to claim 1, characterized in that, The iron core, insulating gasket, bridging plate, and guide post are arranged coaxially.

7. The engine starter relay according to claim 1, characterized in that, The insulating gasket is made of LCP material and is manufactured by injection molding. The bridging piece is manufactured by cold heading extrusion in one step.

8. The engine starter relay according to claim 1, characterized in that, The iron core is provided with a frame on the outside, a first spring is vertically arranged between the iron core and the frame, and a first magnetic sheet is provided at the bottom of the iron core.

9. The engine starter relay according to claim 8, characterized in that, A second magnetic sheet is provided above the frame, and the second magnetic sheet is disposed around the iron core.

10. The engine starter relay according to claim 9, characterized in that, The second magnetic sheet is provided with a base plate, and the stationary contact is set on the base plate.

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