Starter protection structure

Abstract

The present invention discloses a protective structure for a starter motor. The starter motor includes a rear cover screwed onto a housing, a plurality of terminals mounted on the housing, and wires between the terminals. The protective structure comprises an insulating protective sleeve, a first protective cap, and a second protective cap. The insulating protective sleeve is mounted over the wires; the first protective cap is mounted on a portion of the terminals; and the second protective cap is mounted on another portion of the terminals. The protective structure of the starter motor of the present invention does not include a protective cover, resulting in a compact layout and strong adaptability.

Description

Technical Field

[0001] The invention relates to the field of engine manufacturing, in particular to a starter suitable for agricultural engines. Background Art

[0002] Agricultural engines are increasingly used, and the agricultural machinery market is increasingly demanding engines suitable for both dryland and paddy fields. This demand places increasing demands on the protection level of starters, located low in the engine, as their starting performance directly impacts customer satisfaction. Therefore, there is an urgent need to design a starter with a high level of protection to meet the needs of the vast agricultural market.

[0003] Most of the starters currently in use have a waterproof rating of 6 or below. Tractors and other equipment working in paddy fields have engines that are exposed to water or soaked in water. If they work in such an environment for a long time, the starters that are placed in a low position and can only be protected against water splashes will inevitably suffer greatly, and will experience failure modes such as water corrosion and electrical component failure, which will directly affect farmers' farming operations. When working in dry land, such as engines used in wheat machines, which are placed in non-sealed cabins, small, dry wheat straw will be sucked onto the surface of the engine. The starter is placed on the periphery of the engine, which is prone to accumulation of rice, corn, wheat and other leaves, as well as some dust. The protective cover of the starter (such as Figure 1 and Figure 2 As shown, the shield is connected across the relay, switch, and chassis, leaving some space between the terminals and leads. Leaves and dust can enter the shield through these gaps, where they can easily ignite at high temperatures, potentially causing a fire. It also makes it difficult for users to clean items inside the shield.

[0004] To address these waterproofing requirements, currently available starters on the market feature fully sealed structures, with sealing rings added to all connections and wire joints. However, this technical solution fails to effectively protect the starter stator lead wires, creating a risk of water seepage at the wire joints.

[0005] As for the protection of the starter terminal, the most common one at present is a detachable protective cap. During the starter assembly process and after the main engine factory has connected the wires, the protective cap on the terminal may be lost or not reinstalled, resulting in the terminal being in an unprotected state.

[0006] In order to overcome the deficiencies of the above-mentioned technology, the present invention relates to a starter with a high protection level.

[0007] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0008] The object of the present invention is to provide a protective structure for a starter, which does not have a protective cover, so that the starter has the advantages of small layout space, compact layout and strong applicability.

[0009] To achieve the above objectives, the present invention provides a protective structure for a starter motor. The starter motor includes a rear cover screwed to the rear end of a housing, a plurality of terminals mounted on the housing, and wires between the terminals. The protective structure includes an insulating protective sleeve, a first protective cap, and a second protective cap. The insulating protective sleeve is mounted over the wires; the first protective cap is mounted over some of the terminals; and the second protective cap is mounted over another portion of the terminals.

[0010] In a preferred embodiment, the second protective cap has a dovetail groove structure, and the dovetail groove structure only reserves space required for the connection terminal.

[0011] In a preferred embodiment, the protective structure of the starter further includes a sealing gasket and a sealing ring. The sealing gasket is arranged at the screw connecting the rear cover and the rear end of the housing; the sealing ring is arranged at the connection between the rear cover and the rear end of the housing.

[0012] In a preferred embodiment, the protective structure of the starter further includes an O-ring and a rolling riveted magnetic pole. The O-ring is arranged at the switch of the starter; and the rolling riveted magnetic pole is arranged on the casing.

[0013] In a preferred embodiment, the starter protective structure further includes an outlet sheath and lead wires. The outlet sheath is provided on the housing with an interference fit. The lead wires are connected by spot welding of a hard wire and a soft wire, with the hard wire portion directly injection-molded onto the outlet sheath.

[0014] In a preferred embodiment, the outlet sheath is made of U-shaped rubber material.

[0015] Compared to existing technologies, the starter protection structure of the present invention offers the following advantages: It eliminates the need for a protective cover, resulting in a compact layout and enhanced adaptability. Furthermore, an insulating protective sleeve, a first protective cap, a second protective cap, and a wire outlet sheath fulfill the function of a protective cover. Furthermore, sealing elements such as gaskets, sealing rings, O-rings, and rolling riveted magnetic poles are added to enhance the sealing effect, improving the starter's overall sealing performance, resolving the issue of corrosion-induced starting difficulties and extending its service life. Furthermore, the optimized design of the starter's protective structure reduces the potential safety hazards associated with vehicle fires. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a starter according to an embodiment of the prior art from one perspective;

[0017] Figure 2 is a schematic diagram of a starter according to an embodiment of the prior art from another perspective;

[0018] Figure 3 is a schematic structural diagram of a protective structure of a starter according to an embodiment of the present invention;

[0019] Figure 4 is an enlarged schematic diagram of the structure of the second protective cap according to one embodiment of the present invention;

[0020] Figure 5 1 is an enlarged structural diagram of an outlet sheath and an outlet wire according to an embodiment of the present invention.

[0021] Description of main reference numerals:

[0022] 100-starter, 1-rear cover, 2-screws, 3-sealing gasket, 4-housing, 5-sealing ring, 6-riveted magnetic pole, 7-outlet sheath, 8-lead wire, 9-O-ring, 10-insulating protective sleeve, 11-first protective cap, 12-second protective cap, 200-starter of the prior art, 201-protective cover. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0024] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.

[0025] like Figure 1 As shown, according to a preferred embodiment of the present invention, a protective structure of a starter is provided. The starter 100 includes a back cover 1 set at the rear end of the casing 4 by screws 2, a plurality of wiring terminals set on the casing 4, and wires set between the wiring posts and the plurality of wiring terminals and the wiring posts. The protective structure includes a sealing gasket 3, a sealing ring 5, a rolling riveted pole 6, an outlet sheath 7, a lead wire 8, an O-ring 9, an insulating protective sleeve 10, a first protective cap 11 and a second protective cap 12.

[0026] In some embodiments, an insulating protective sleeve 10 is placed over the exterior of the wires to provide insulation and protection. A first protective cap 11 is placed over a portion of the multiple terminal blocks. In this embodiment, the first protective cap 11 is shaped like a pipe, with its pipe portion tightly fastened to the terminal block and its mouthpiece tightly wrapped around the terminal block of the insulating protective sleeve 10, preventing the terminal block from being exposed. This effectively ensures water drainage and airtightness at the terminal block and terminal block. A second protective cap 12 is placed over another portion of the multiple terminal blocks. The second protective cap 12 has a dovetail groove structure. In this embodiment, the dovetail groove structure of the second protective cap 12 is similar in shape to the pipe, except that a dovetail groove is provided on the side of the pipe. During installation, the second protective cap 12 can be opened along the dovetail groove, leaving only the space required for the terminal block. The dovetail groove structure can be replaced after the terminal block is installed. The elasticity of the rubber itself also ensures waterproofing of the terminal block and terminal block. A sealing gasket 3 is installed at the screw 2 connecting the rear cover 1 to the rear end of the housing 4. A sealing ring 5 is installed at the junction of the rear cover 1 and the rear end of the housing 4. An O-ring 9 is installed at the starter switch; and a roll-riveted magnetic pole 6 is installed on the housing 4. A wire sheath 7 is installed on the housing 4 with an interference fit. The lead wire 8 is connected by spot welding of hard and soft wires, with the hard wire portion directly injection-molded onto the wire sheath 7. The wire sheath is made of U-shaped rubber material.

[0027] See also Figures 1 to 3 , Figure 1 is a schematic diagram of a starter according to an embodiment of the prior art from one perspective; Figure 2 is a schematic diagram of a starter according to an embodiment of the prior art from another perspective; Figure 3 This is a schematic diagram of a starter protection structure according to one embodiment of the present invention. In some embodiments, the starter protection structure eliminates the drain pipe on the starter's rear cover 1 to prevent water ingress. Furthermore, a sealing gasket 3 is added to the screws 2 on the starter's rear cover 1. A sealing ring 5 is added to the connection between the rear cover 1 and the housing 4 to prevent water ingress. The magnetic poles on the starter's housing 4, previously secured with hexagon socket head cap screws 2, have been replaced with roll-riveted magnetic poles 6 to prevent water ingress.

[0028] like Figures 4 and 5 As shown, Figure 4 is an enlarged schematic diagram of the structure of the second protective cap 12 according to one embodiment of the present invention; Figure 5The figure is an enlarged structural schematic diagram of the outlet sheath 7 and lead wire 8 according to one embodiment of the present invention. In some embodiments, insulation protection is added to the wire connecting the starter relay and the switch. At the same time, a first protective cap 11 is added to the terminal between the wires at the end where the starter supplier connects the wires. When the starter leaves the factory, the first protective cap 11 is put on the terminal from the cigarette holder, so that one end of the wire and the first protective cap 11 are integrated. A second protective cap 12 is added to the other end, also forming an integrated structure, to facilitate the main engine manufacturer to promptly cover the terminal and the terminal block after wiring. The second protective cap 12 only reserves space required for the terminal block. After the wires are connected, the dovetail groove structure protective cap is in a closed state, preventing leaves and dust from entering the interior. The first protective cap 11 and the second protective cap 12 are integrated with the wires and the terminal block, and do not separate from the wires during assembly and disassembly, preventing the first protective cap 11 and the second protective cap 12 from being lost, and ensuring the waterproof and dustproof effects of the terminal block and the terminal block at all times.

[0029] See also Figure 1 In some embodiments, the junction between the starter housing 4 and the stator lead wire 8 utilizes a U-shaped rubber lead wire sheath 7, which provides an interference fit with the housing 4 and provides a waterproof seal. The lead wire 8 is connected by spot welding a rigid and flexible wire. The rigid portion of the lead wire 8 is directly injection-molded onto the lead wire sheath 7 to prevent water from entering along the wire.

[0030] See also Figure 1 In some embodiments, the starter switch is sealed with an O-ring 9 instead of the original rubber sleeve. This seal effectively reduces the amount of rubber material and avoids the drawbacks of the rubber sleeve, which lacks a vent and can easily become sucked flat during switch operation. With a vent, water from the outside could flow into the switch core through the vent.

[0031] In summary, the starter protection structure of the present invention offers the following advantages: It eliminates the need for a protective cover, resulting in a compact layout and enhanced adaptability. Furthermore, an insulating protective sleeve, a first protective cap, a second protective cap, and a wire outlet sheath fulfill the function of a protective cover. Furthermore, the addition of sealing gaskets, sealing rings, O-rings, and rolling riveted magnetic poles enhances the sealing effect, improving the overall sealing performance of the starter, resolving the issue of corrosion-induced starting difficulties and extending its service life. Furthermore, the optimized design of the starter protection structure mitigates the potential safety hazards associated with vehicle fires.

[0032] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A protective structure for a starter, comprising a plurality of binding posts and terminals provided on a housing and wires between the plurality of binding posts and the terminals, characterized in that: The protective structure comprises: An insulating protective sleeve, which is sleeved on the outside of the wire; a first protective cap, which is provided on a portion of the plurality of binding posts and the wiring terminals; and a second protective cap, which is provided on the plurality of binding posts and the wiring terminals of the other portion; The first protective cap and the second protective cap are integrally formed with the wire and the terminal and cannot be separated; The second protective cap is a pipe-shaped structure, and the pipe-shaped structure includes a dovetail groove structure, which is arranged on the side of the pipe-shaped structure, and the dovetail groove structure only reserves space required for the wiring terminal; During installation, the second protective cap is opened along the dovetail groove structure. Since the dovetail groove structure only reserves space for the wiring terminals, the second protective cap is put back after the wiring terminals are installed. The elasticity of the rubber itself can ensure the waterproof effect of the wiring posts and the wiring terminals.

2. The protective structure of the starter according to claim 1, characterized in that: Also includes: a sealing gasket provided at a screw for connecting the rear cover to the rear end of the housing; and A sealing ring is arranged at the junction between the rear cover and the rear end of the housing.

3. The protective structure of the starter according to claim 1, characterized in that: Also includes: An O-ring, which is provided at the switch of the starter; as well as The rolling riveting pole is arranged on the casing.

4. The protective structure of the starter according to claim 1, characterized in that: Also includes: an outlet sheath, which is arranged on the housing in an interference fit with the housing; as well as The lead-out wire adopts a connection method of spot welding of a hard wire and a soft wire, and the hard wire part is directly injection-molded on the lead-out wire sheath.

5. The protective structure of the starter according to claim 4, characterized in that: The outlet sheath is made of U-shaped rubber material.

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