Drainage and dustproof structure of starter shell

Abstract

The lowest point of the starter shell is provided with a mounting hole for mounting a pipe body, the pipe body is provided with an axially-penetrating through hole, the through hole is communicated with an inner cavity of the starter shell, the upper end of the through hole is a water inlet, the lower end of the through hole is a water outlet, the outer circumference of the pipe body is provided with an annular throat opening, and the throat opening is communicated with the inner cavity of the starter shell. The throat is installed in the installation hole, a plurality of left barbs and a plurality of right barbs are arranged in the through hole, the left barbs and the right barbs are arranged at intervals in the axial direction, the left barbs and the right barbs are distributed in a staggered mode in the axial direction, and the left barbs and the right barbs are arranged in a downward inclined mode. The starter has the beneficial effects that water and mud entering the starter can be discharged out of the starter in time, the fault phenomena of ablation and clamping stagnation of the starter are reduced, the internal and external pressure difference during starting of the starter can be well balanced, meanwhile, the cooling speed of the starter can be increased, high-temperature ablation and aging of the starter are avoided, and the service life of the starter is prolonged. And a dry working environment is kept in the starter.

Description

Technical Field

[0001] This invention relates to starters, and more particularly to a starter housing drainage and dustproof structure. Background Technology

[0002] Before an internal combustion engine can operate under its own power, it must rely on external force to rotate. The starter motor plays this role, using three components to achieve the entire starting process. A DC motor introduces current from the battery and causes mechanical motion in the starter motor's drive gear; a transmission engages the drive gear with the flywheel ring gear, automatically disengaging after the engine starts; and an electromagnetic switch controls the starter motor's circuit. While starters used in different types of internal combustion engines may vary in form, their DC motor components are generally similar. As an electromechanical device, the starter motor is an electrically rotating component and its body cannot be completely sealed, lacking waterproofing capabilities. Therefore, special attention must be paid to waterproofing during use. Various waterproofing methods are currently in use, but because the starter motor is installed low in the internal combustion engine, typically at the bottom, it is prone to water and mud ingress during vehicle operation. Water and mud seeping into the starter motor body through gaps can easily accumulate and, if not drained promptly, will eventually cause rust, jamming, and ultimately, starter motor burnout. This results in a high failure rate of starters, increases the workload of after-sales service, and reduces brand reputation. In addition, the starter generates high temperatures when starting, and due to the large temperature and pressure difference between the inside and outside of the starter, condensation will be produced. Excessive accumulation of condensation can lead to starter burnout. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a starter housing drainage and dustproof structure.

[0004] The objective of this invention is achieved through the following technical solution: a starter housing drainage and dustproof structure, comprising a starter housing and a pipe body. The lowest point of the starter housing is provided with a mounting hole for mounting the pipe body. The pipe body has an axially penetrating through hole that communicates with the inner cavity of the starter housing. The upper end of the through hole is a water inlet, and the lower end of the through hole is a water outlet. An annular throat is provided on the outer circumference of the pipe body. The throat is installed in the mounting hole. Multiple left barbs and multiple right barbs are provided in the through hole. The multiple left barbs are axially spaced apart, and the multiple right barbs are axially spaced apart. The left and right barbs are staggered in the axial direction, and both the left and right barbs are inclined downwards.

[0005] Optionally, both the left and right barbs are arc-shaped structures, and on the axial projection plane, the left and right barbs form a circular structure that closes the through hole.

[0006] Optionally, the tube below the throat includes an upper cylinder, a conical section, and a lower cylinder connected in sequence, with the outer diameter of the upper cylinder being larger than the outer diameter of the lower cylinder.

[0007] Optionally, the pipe above the throat is a limiting section, with a water inlet notch radially opened on the limiting section, forming a limiting step between the limiting section and the throat.

[0008] Optionally, the bottom of the inlet notch is located inside the throat.

[0009] Optionally, the starter housing is made of plastic, and the throat and mounting hole are interference fit.

[0010] Optionally, the starter housing includes a front housing and a rear housing, both of which have semi-circular holes. After the front housing and the rear housing are assembled, the two semi-circular holes form mounting holes.

[0011] The present invention has the following advantages: The pipe body of the present invention can promptly drain water and mud from the starter motor, reducing starter motor erosion and jamming malfunctions. It can also effectively balance the internal and external pressure difference of the starter motor during start-up, while accelerating the cooling speed of the starter motor, avoiding high-temperature erosion and aging, and maintaining a dry working environment inside the starter motor. The barbed part of the pipe body can prevent water and mud from entering the starter motor, and the pipe body has a one-way conduction function, so mud and water can only be discharged from the inside of the starter motor and cannot enter from the outside, thereby greatly reducing the failure rate of the starter motor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 A schematic diagram of the tube structure Figure 3 Cross-sectional view of the tube In the diagram, 1-inlet, 2-limiting step, 3-throat, 4-left barb, 5-right barb, 6-outlet, 7-conical section, 8-lower cylinder, 9-upper cylinder, 10-pipe, 11-inlet notch, 20-starter housing. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this invention, 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, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 invention based on the specific circumstances.

[0019] like Figure 1 As shown, the starter housing drainage and dustproof structure includes a starter housing 20 and a pipe body 10. A mounting hole for the pipe body 10 is provided at the lowest point of the starter housing 20. Figure 2 and Figure 3As shown, the pipe body 10 has an axially penetrating through hole that communicates with the inner cavity of the starter housing 20. The upper end of the through hole is the water inlet, and the lower end is the water outlet 6. An annular throat 3 is provided on the outer circumference of the pipe body 10. The throat 3 is installed in the mounting hole. Multiple left barbs 4 and multiple right barbs 5 are provided in the through hole. The multiple left barbs 4 are axially spaced, and the multiple right barbs 5 are axially spaced. The left barbs 4 and right barbs 5 are staggered in the axial direction. Both the left barbs 4 and right barbs 5 are inclined downwards. When water enters the starter, the water inside the starter accumulates at the lowest point of the starter, while the pipe body 10 is installed... Installed at the lowest point of the starter motor, water inside the starter motor enters the through-hole through inlet 1, and flows out through the throat 3, right barb 5, left barb 4, and outlet 6, completely draining the water from the starter motor. When the starter motor starts, the internal temperature rises rapidly, while the starter motor body dissipates heat slowly. At this time, the high internal temperature can be quickly cooled by the tube 10. The ventilation effect of the tube 10 can quickly reduce the high temperature inside the starter motor. During starting, the internal high temperature and pressure are high, while the external air pressure is low. The ventilation effect of the tube 10 can effectively balance the air pressure inside and outside the starter motor, preventing condensation inside the starter motor. Furthermore, both the left barb 4 and right barb 5 are arc-shaped structures. On the axial projection plane, the left barb 4 and right barb 5 form a circular structure that closes the through-hole. Therefore, the tube 10 only has a one-way conduction function; mud and water can only flow out from inside the starter motor, while external splashed mud and water cannot enter the starter motor, thus producing a waterproof and dustproof effect.

[0020] In this embodiment, as Figure 2 and Figure 3 As shown, the tube 10 below the throat 3 includes an upper cylinder 9, a tapered section 7, and a lower cylinder 8 connected in sequence. The outer diameter of the upper cylinder 9 is larger than the outer diameter of the lower cylinder 8. The starter housing 20 is a plastic housing. The throat 3 and the mounting hole are interference-fitted. Since the starter housing 20 is a plastic housing, during installation, the lower cylinder 8 can be inserted into the mounting hole from top to bottom first, and then pushed axially. The tapered section 7 can compress the mounting hole, causing the plastic housing to deform. After the upper cylinder 9 passes the mounting hole... The plastic housing is reset, and at this time the plastic housing and the throat 3 are interference fit. Further, optionally, the pipe body 10 above the throat 3 is a limiting section, and a water inlet notch 11 is radially opened on the limiting section. A limiting step 2 is formed between the limiting section and the throat 3. When the pipe body 10 is installed in the mounting hole, the limiting step 2 fits with the inner cavity of the starter housing 20, while the top of the upper cylinder 9 fits with the outer edge of the starter housing 20, thereby preventing the pipe body 10 from moving axially and ensuring the reliability of the pipe body 10 installation.

[0021] In this embodiment, as Figure 1As shown, the bottom of the water inlet 11 is located inside the throat 3, so that the water in the starter housing 20 can completely enter the through hole through the water inlet 11, thereby completely draining the water in the starter housing 20.

[0022] In another embodiment, the starter housing 20 includes a front housing and a rear housing, both of which have semi-circular holes. After the front housing and the rear housing are assembled, the two semi-circular holes form mounting holes. Similarly, the throat 3 is also interference-fitted with the mounting holes. During installation, the throat 3 is directly inserted into the semi-circular holes, and then the front housing and the rear housing are assembled.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A starter housing drainage and dustproof structure, characterized in that: The device includes a starter housing and a tube. The lowest point of the starter housing has a mounting hole for mounting the tube. The tube has an axially penetrating through hole that communicates with the inner cavity of the starter housing. The upper end of the through hole is a water inlet, and the lower end is a water outlet. An annular throat is formed on the outer circumference of the tube and is installed in the mounting hole. The through hole contains multiple left barbs and multiple right barbs, which are axially spaced apart. The left and right barbs are staggered in the axial direction and are both inclined downwards.

2. The starter housing drainage and dustproof structure according to claim 1, characterized in that: Both the left and right barbs are arc-shaped structures. On the axial projection plane, the left and right barbs form a circular structure that closes the through hole.

3. The starter housing drainage and dustproof structure according to claim 2, characterized in that: The tube below the throat includes an upper cylinder, a conical section, and a lower cylinder connected in sequence, with the outer diameter of the upper cylinder being larger than the outer diameter of the lower cylinder.

4. The starter housing drainage and dustproof structure according to claim 3, characterized in that: The pipe above the throat is a limiting section, and a water inlet notch is radially opened on the limiting section, forming a limiting step between the limiting section and the throat.

5. The starter housing drainage and dustproof structure according to claim 4, characterized in that: The bottom of the water inlet is located inside the throat.

6. The starter housing drainage and dustproof structure according to claim 5, characterized in that: The starter housing is a plastic housing, and the throat and the mounting hole are interference fit.

7. The starter housing drainage and dustproof structure according to claim 5, characterized in that: The starter housing includes a front housing and a rear housing. Both the front housing and the rear housing have semi-circular holes. After the front housing and the rear housing are assembled, the two semi-circular holes form the mounting hole.

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