CN-224217315-U - Waterproof connection structure of ignition coil

CN224217315UCN 224217315 UCN224217315 UCN 224217315UCN-224217315-U

Abstract

The utility model discloses a waterproof connection structure of an ignition coil, which comprises an ignition coil body, wherein a rubber sheath is arranged at the bottom end of the ignition coil body in a sealing manner, a conductive spring is arranged in the rubber sheath, the ignition coil body is fixedly arranged on an engine cylinder cover through a bolt, a jack for penetrating the rubber sheath is arranged on the engine cylinder cover, a positioning ring is integrally formed at the position, close to the top end, of the outer wall of the rubber sheath, dust prevention and waterproof protection between the rubber sheath and an engine cylinder cover are realized through the arrangement of sealing ribs, water cannot flow back into the annular ventilation groove from the bottom end opening of the first ventilation hole due to the action of gravity, and when wading, the water cannot flow back into the annular ventilation groove due to the action of water pressure, air in the ventilation groove and the engine cylinder cover cannot be discharged outwards, and resistance generated by compressed gas prevents the water from flowing back into the annular ventilation groove, so that waterproof protection is realized, and the use effect is good.

Inventors

SHI LIQIANG

Assignees

河北三动科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250519

Claims (4)

1. The waterproof connecting structure of the ignition coil is characterized by comprising an ignition coil body (1), wherein a rubber sheath (3) is arranged at the bottom end sealing sleeve of the ignition coil body (1), a conductive spring (10) is arranged in the rubber sheath (3), the ignition coil body (1) is fixedly arranged on an engine cylinder cover through bolts, a jack for penetrating the rubber sheath (3) is arranged on the engine cylinder cover, a positioning ring (4) is integrally formed at the position, close to the top end, of the outer wall of the rubber sheath (3), the position, below the positioning ring (4), of the rubber sheath (3) penetrates into the jack, a plurality of sealing edge pieces (5) are integrally formed at the outer wall, below the positioning ring (4), of the rubber sheath (3), the top surface of the rubber sheath (3) is attached to the outer wall of the ignition coil body (1), an annular vent groove (7) is formed at the top surface of the rubber sheath (3), a first vent hole (8) and a second vent hole (9) are formed in a penetrating mode on the engine cylinder cover, the first vent hole (8) and the second vent hole (9) are communicated with the annular vent groove (7) at the bottom end of the positioning ring (4), the sealing edge pieces (5) are all positioned above the bottom end openings of the second ventilation holes (9).
2. The waterproof connecting structure of the ignition coil of claim 1, wherein the top surface of the rubber sheath (3) is coated with waterproof sealant, and the top surface of the rubber sheath (3) is adhered to the ignition coil body (1) through the waterproof sealant.
3. The waterproof connecting structure of the ignition coil of claim 1, wherein the top end opening of the rubber sheath (3) is sleeved on the ignition coil body (1) in interference fit, and the bottom end opening of the rubber sheath (3) is sleeved on the corresponding spark plug in interference fit.
4. The waterproof connecting structure of the ignition coil of claim 3, wherein the outer wall of the ignition coil body (1) positioned in the rubber sheath (3) is integrally formed with a conical protrusion (2), a matching groove (6) is formed in the rubber sheath (3) at a position corresponding to the conical protrusion (2), and the conical protrusion (2) is in interference fit with the matching groove (6).

Description

Waterproof connection structure of ignition coil Technical Field The utility model relates to the technical field of engines, in particular to a waterproof connection structure of an ignition coil. Background The ignition coil is an important part of an engine and is responsible for converting low-voltage current of a vehicle into high-voltage current so as to ignite mixed gas in the engine through a spark plug, the main function of a rubber sheath of the ignition coil is to protect the ignition coil from dust, dirt and other potential harmful substances, most of traditional ignition coils have dust-proof requirements, but new energy automobiles, SUVs and the like have obviously improved water-proof and dust-proof requirements on the ignition coil due to the characteristics of a high-voltage system, complex working conditions (such as wading running) and more severe environmental adaptability requirements. The ignition coil commonly used in the market at present is mainly realized dustproof function through the rubber sheath assembled on the ignition coil body and the engine cylinder cover assembled connection. The inside stainless steel wire spring that is equipped with of rubber sheath carries out electric connection with the spark plug, and rubber sheath realizes high-pressure protection with spark plug ceramic body interference fit, and radial interference fit of sealed arris piece and engine cylinder cap on the rubber sheath has seted up ventilative groove and engine cylinder cap axial interference fit in order to realize dustproof exhaust requirement in the axial of rubber sheath sealed arris piece, but this kind of structure can't realize waterproofly to can't satisfy dustproof and waterproof requirement simultaneously, for this reason, we propose an ignition coil's waterproof connection structure. Disclosure of utility model The utility model aims to provide a waterproof connecting structure of an ignition coil, which solves the problems in the background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a waterproof connection structure of ignition coil, includes the ignition coil body, the bottom seal cover of ignition coil body is equipped with the rubber sheath, be provided with conductive spring in the rubber sheath, the ignition coil body passes through bolt fixed mounting on the engine cylinder cover, and is provided with the jack that is used for wearing to establish the rubber sheath on the engine cylinder cover, the outer wall of rubber sheath is close to top department integrated into one piece and has the holding ring, the rubber sheath is located the position of holding ring below and all penetrates the jack, the outer wall integrated into one piece that the rubber sheath is located the holding ring below has a plurality of sealed arrises, the top surface of rubber sheath is laminated with the outer wall of ignition coil body, annular ventilation groove has been seted up to the top surface of rubber sheath, run through on the rubber sheath and be provided with first air vent and second air vent, the top and the annular ventilation groove intercommunication of first air vent all are located the top of holding ring, the bottom opening of first air vent is located the top of holding ring, sealed arris all is located the open-ended top of second air vent. The utility model further provides a scheme that the top surface of the rubber sheath is coated with waterproof sealant, and the top surface of the rubber sheath is adhered to the ignition coil body through the waterproof sealant. As a further scheme of the utility model, the top end opening of the rubber sheath is sleeved on the ignition coil body in an interference fit manner, and the bottom end opening of the rubber sheath is sleeved on the corresponding spark plug in an interference fit manner. As a still further scheme of the utility model, the outer wall of the ignition coil body positioned in the rubber sheath is integrally formed with a conical protrusion, a matching groove is arranged at the corresponding position of the conical protrusion in the rubber sheath, and the conical protrusion is in interference fit with the matching groove. Compared with the prior art, the utility model has the beneficial effects that: According to the utility model, through the arrangement of the sealing rib, dust prevention and waterproof protection between the rubber sheath and the engine cylinder cover are realized, through the matching of the annular ventilation groove, the first ventilation hole and the second ventilation hole, a 冂 -shaped ventilation groove can be formed, one end opening of the ventilation groove (namely, the bottom end opening of the first ventilation hole) is positioned on the outer side of the engine cylinder cover, the other end opening of the ventilation groove (namely, the bottom end opening of the second ventilation hole) is