Automobile generator protective cover
By installing a second protective cover outside the automotive generator protective cover and introducing ventilation ducts, the generator is actively cooled by using cold air, which solves the problem of poor heat dissipation in the existing technology and improves the generator's operational stability and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUZHOU DEKASI ELECTRONICS CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-06-02
AI Technical Summary
Existing automotive alternator covers generally have poor heat dissipation performance and cannot effectively reduce the temperature of the alternator itself, leading to unstable operation of the alternator in high-temperature environments.
A second protective cover is installed outside the first protective cover, and cold air is introduced into the ventilation cavity of the second protective cover through a ventilation duct. The cold air is blown directly onto the generator body through the ventilation cavity and vents to dissipate heat and cool down. At the same time, a filter screen is installed to filter impurities to ensure a continuous supply of cold air.
This achieves continuous heat dissipation and cooling of the generator body, improves the generator's operational stability and service life, and prevents impurities from entering and affecting the generator's normal operation.
Smart Images
Figure CN224319158U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive generator technology, specifically to an automotive generator protective cover. Background Technology
[0002] The automotive alternator (also known as an AC generator) is a core component of a vehicle's electrical system. Its main functions are to supply power to the vehicle's electrical systems and charge the battery when the engine is running. Automotive alternators typically have a protective cover on one side and a pulley on the other. The cover prevents dust, dirt, rainwater, and other external substances from entering the alternator compartment. Because the alternator is connected to the engine via the pulley, it is close to the engine (a heat source), resulting in a relatively high ambient temperature around it. Therefore, existing automotive alternator covers usually also have ventilation openings to promote heat dissipation, thereby ensuring the alternator's normal operation and extending its lifespan.
[0003] However, simply adding vents to the protective cover is not very effective for heat dissipation of the car alternator. Therefore, some car alternators with improved protective cover heat dissipation structures have emerged. For example, one existing car alternator protective cover includes a first protective cover connected to the alternator body, with a second protective cover added to the outside of the first protective cover. The second protective cover and the first protective cover are stacked on top of each other, and both have vents on their outer peripheral walls. The second protective cover has an inner cavity, which acts as both an insulation layer and can temporarily store radiant air, thereby improving the heat insulation effect of the alternator body and reducing heat transfer between the heat source and the alternator body. However, this technical solution, by adding a second protective cover, is essentially just adding a heat insulation structure to the first protective cover. It can only reduce the transfer of heat from external heat sources to the alternator body, but it lacks active heat dissipation function for the alternator body. The improvement in heat dissipation for the alternator body is still relatively limited. When the alternator body overheats due to excessive heat generation, the above technical solution cannot guarantee the normal operation of the alternator. Utility Model Content
[0004] The purpose of this invention is to provide a solution that solves the problem that the protective cover cannot directly dissipate heat and cool the generator. By setting a second protective cover outside the first protective cover and connecting the second protective cover to a ventilation duct, the ventilation duct can input cold air into the second protective cover and the first protective cover, thereby dissipating heat and cooling the ventilation cavity in the second protective cover and the generator in the first protective cover.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a protective cover for an automotive generator, comprising a first protective cover and a second protective cover, wherein the first protective cover is used to connect to the generator body, and the first protective cover is provided with a first heat dissipation vent, the second protective cover is located on the side of the first protective cover away from the generator body, and the second protective cover is provided with a ventilation cavity, characterized in that it further comprises a ventilation duct connecting the second protective cover, the ventilation duct having an air inlet and an air outlet, the ventilation duct being connected to the ventilation cavity through the air outlet, the air inlet of the ventilation duct being directed toward the air intake grille, and the first protective cover being provided with a ventilation opening communicating with the ventilation cavity, so that the airflow in the ventilation duct enters the ventilation cavity and the ventilation opening.
[0006] In one embodiment, the second protective cover is provided with a second heat dissipation vent, which is connected to the ventilation cavity.
[0007] In one embodiment, the vent is located on the side of the first protective cover corresponding to the ventilation cavity, and the vent includes a plurality of discretely arranged sub-ventilation holes for blocking impurities.
[0008] In one embodiment, the second protective cover includes a back panel and a side panel, the side panel being disposed around the periphery of the back panel and connected to the first protective cover, and the air outlet of the ventilation duct being connected to the back panel so that the airflow in the ventilation duct is directed towards the air outlet.
[0009] In one embodiment, the first heat dissipation vents are evenly distributed on the outer peripheral wall of the first protective cover, and the second heat dissipation vents are evenly distributed on the side plate of the second protective cover.
[0010] In one embodiment, the back panel includes a central portion and a peripheral portion, the distance between the central portion and the first protective cover is greater than the width of the side panel extending from the back panel to the first protective cover, and the peripheral portion extends obliquely from the central portion to the side panel, so that the distance between the peripheral portion and the first protective cover gradually decreases from the inside to the outside.
[0011] In one embodiment, the ventilation duct is provided with a filter screen for filtering impurities.
[0012] The advantages of this application compared to the prior art are:
[0013] In this embodiment, when the automotive generator is installed on the vehicle, the air inlet of the ventilation duct is positioned facing the vehicle's air intake grille. This allows cold air entering from the air intake grille during vehicle movement to directly enter the ventilation duct through the air inlet, then through the ventilation duct's outlet into the ventilation chamber of the second protective cover, and subsequently through the vent into the first protective cover. On one hand, the cold air entering the ventilation chamber facilitates air exchange, expelling hot air and replacing it with cold air, thus cooling the ventilation chamber and increasing its heat absorption capacity. This enhances the protective effect of the protective cover on the generator body. On the other hand, the cold air directly enters the first protective cover through the vent, blowing directly onto the generator body, directly dissipating and cooling it. Finally, the cold air is exhausted through the first heat dissipation vent of the first protective cover, carrying away heat from the generator body. During vehicle movement, cold air continuously enters the first and second protective covers through the ventilation duct, absorbing heat before being exhausted, providing continuous cooling for the generator body. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a three-dimensional structural schematic diagram of a protective cover for an automobile generator according to an embodiment of this application;
[0016] Figure 2 for Figure 1 The diagram behind the first protective shield is omitted.
[0017] Figure 3 This is a schematic diagram showing that the second protective cover has a second heat dissipation vent in an embodiment of this application;
[0018] Figure 4 This is a schematic diagram of the ventilation opening on the first protective cover in an embodiment of this application;
[0019] Figure 5 This is a schematic diagram of the structure of the second protective cover in the embodiments of this application;
[0020] Figure 6 This is a cross-sectional view of an embodiment of this application. Detailed Implementation
[0021] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.
[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0023] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", 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 application is in use. They are only for the convenience of describing this application 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 application.
[0024] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.
[0025] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.
[0026] Please refer to Figure 1 , Figure 2 This application provides an automotive alternator protective cover, comprising a first protective cover 100 and a second protective cover 200. The first protective cover 100 is connected to the alternator body and has a first heat dissipation vent 110. The second protective cover 200 is located on the side of the first protective cover 100 away from the alternator body, and has a ventilation cavity 220 inside. In this embodiment, the first protective cover 100 is fixedly connected to the alternator body, covering one end of the alternator body to block external substances such as dust, dirt, and rainwater. The first heat dissipation vent 110 on the first protective cover 100 connects the internal and external spaces of the first protective cover 100, allowing the alternator body to dissipate heat to the outside through the first heat dissipation vent 110. In this embodiment, the second protective cover 200 is located on the side of the first protective cover 100 away from the alternator body, and has a ventilation cavity 220 inside, which acts as a heat insulation layer to reduce the heat transferred from this side to the alternator body.
[0027] The difference between this embodiment and the prior art is that it also includes a ventilation duct 300 connecting the second protective cover 200. The ventilation duct 300 has an air inlet 310 and an air outlet 320. The ventilation duct 300 is connected to the ventilation cavity 220 through the air outlet 320. The air inlet 310 of the ventilation duct 300 is directed toward the air intake grille. The first protective cover 100 is provided with a vent 120 connecting the ventilation cavity 220 so that the airflow in the ventilation duct 300 enters the ventilation cavity 220 and the vent 120. In this embodiment, when the car generator is installed on the car, the air inlet 310 of the ventilation duct 300 is positioned facing the car's air intake grille. This allows cold air entering from the air intake grille during vehicle movement to directly enter the ventilation duct 300 through the air inlet 310, then through the air outlet 320 into the ventilation chamber 220 of the second protective cover 200, and subsequently through the ventilation opening 120 into the first protective cover 100. This cold air entering the ventilation chamber 220 facilitates air exchange, displacing the hot air and replacing it with cold air, thus improving ventilation within the ventilation chamber 220 itself. The cooling effect enhances the heat absorption capacity of the ventilation cavity 220, thereby improving the protective effect of the protective cover on the generator body. On the other hand, cold air enters directly into the first protective cover 100 through the ventilation port 120, which blows directly onto the generator body, thus directly cooling the generator body. The cold air is eventually discharged through the first heat dissipation port 110 of the first protective cover 100, thereby taking away the heat from the generator body. During the vehicle's movement, cold air continuously enters the first protective cover 100 and the second protective cover 200 through the ventilation duct 300, absorbs heat, and is discharged, thus continuously cooling the generator body.
[0028] For further details, please refer to Figure 3 In this embodiment, the second protective cover 200 is provided with a second heat dissipation vent 210, which is connected to the ventilation cavity 220. This allows a portion of the air in the ventilation cavity 220 to be blown towards the generator body through the ventilation vent 120, while another portion is directly exhausted through the second heat dissipation vent 210. This reduces the heat transferred from the ventilation cavity 220 to the generator body, accelerates the air exchange rate within the ventilation cavity 220, and lowers the temperature of the ventilation cavity 220 itself. In other words, the second protective cover 200 itself can directly dissipate heat and cool down through the second heat dissipation vent 210, further reducing the temperature of the air entering the first protective cover 100 through the ventilation vent 120, thereby further improving the cooling effect of the protective cover on the automotive generator.
[0029] For further details, please refer to Figure 4In this embodiment, the vent 120 is located on the side of the first protective cover 100 corresponding to the ventilation cavity 220. The vent 120 includes a plurality of discretely arranged sub-ventilation holes 121. Thus, the sub-ventilation holes 121 are all separated by partition structures 122, and the area of the sub-ventilation holes 121 is reduced to form a filter structure, so that large-sized impurities cannot pass through the sub-ventilation holes 121. That is, the partition structures 122 between the sub-ventilation holes 121 can be used to block impurities and prevent large-sized impurities (such as leaves) from entering the first protective cover 100 and affecting the normal operation of the generator.
[0030] For further details, please refer to Figure 5 , Figure 6 In this embodiment of the application, the second protective cover 200 includes a back plate 230 and a side plate 240. The side plate 240 is disposed around the back plate 230 and connected to the first protective cover 100. The air outlet 320 of the ventilation duct 300 is connected to the back plate 230 so that the airflow in the ventilation duct 300 is directed towards the air outlet 120. In this embodiment, the side plate 240 forms the outer peripheral wall of the second protective cover 200 and surrounds the ventilation cavity 220 between the back plate 230 and the first protective cover 100. The air outlet 320 of the ventilation duct 300 communicates with the ventilation cavity 220 at the back plate 230 of the first protective cover 100. The ventilation port 120 is located on the side of the first protective cover 100 corresponding to the ventilation cavity 220. Therefore, the air outlet 320 of the ventilation duct 300 is directly opposite the ventilation port 120 on the first protective cover 100. Since the air that has just entered the ventilation cavity 220 from the air outlet 320 does not have time to absorb too much heat in the ventilation cavity 220, this cold air can preferably enter the ventilation port 120 which is directly opposite to its direction of travel, so as to directly enter the first protective cover 100 and blow directly on the generator body, thereby improving the direct heat dissipation and cooling effect on the generator body and improving the air intake efficiency of the first protective cover 100. The cold air that cannot immediately enter the ventilation port 120 absorbs heat in the ventilation cavity 220. In addition, in embodiments where a second heat dissipation port 210 is provided on the second protective cover 200, the air that absorbs heat in the ventilation cavity 220 can also be directly discharged from the second heat dissipation port 210 of the second protective cover 200.
[0031] For further details, please refer to Figure 6In this embodiment of the application, the back plate 230 includes a central portion 231 and a peripheral portion 232. The distance between the central portion 231 and the first protective cover 100 is greater than the width of the side plate 240 extending from the back plate 230 to the first protective cover 100. The peripheral portion 232 extends obliquely from the central portion 231 to the side plate 240, so that the distance between the peripheral portion 232 and the first protective cover 100 gradually decreases from the inside to the outside. Thus, the thickness of the ventilation cavity 220 corresponding to the center 231 of the back plate 230 is greater than its thickness corresponding to the outer periphery 232, and the thickness of the ventilation cavity 220 corresponding to the outer periphery 232 gradually decreases from the middle to the outside. The ventilation duct 300 delivers cold air to the area of the ventilation cavity 220 corresponding to the center 231 of the back plate 230. The air that needs to be discharged passes through the area of the ventilation cavity 220 corresponding to the outer periphery 232 of the back plate 230 and is discharged through the second heat dissipation port 210. Since the thickness of the ventilation cavity 220 gradually decreases at this point, the air will be accelerated, further improving the ventilation efficiency in the ventilation cavity 220.
[0032] Furthermore, in some embodiments of this application, the ventilation duct 300 is provided with a filter screen to filter impurities. The filter screen can filter impurities with finer particle sizes, such as sand, gravel, and insects, to prevent impurities from entering the generator body and causing damage.
[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A protective cover for an automotive alternator, comprising a first protective cover and a second protective cover, wherein the first protective cover is used to connect to an alternator body, the first protective cover has a first heat dissipation vent, the second protective cover is disposed on the side of the first protective cover opposite to the alternator body, and the second protective cover has a ventilation cavity inside, characterized in that... It also includes a ventilation duct connected to the second protective cover. The ventilation duct has an air inlet and an air outlet. The ventilation duct is connected to the ventilation cavity through the air outlet. The air inlet of the ventilation duct is directed toward the air intake grille. The first protective cover is provided with a vent that connects to the ventilation cavity so that the airflow in the ventilation duct enters the ventilation cavity and the vent.
2. The automotive generator protective cover according to claim 1, characterized in that, The second protective cover is provided with a second heat dissipation vent, which is connected to the ventilation cavity.
3. A protective cover for an automotive generator according to claim 2, characterized in that, The vent is located on the side of the first protective cover corresponding to the ventilation cavity, and the vent includes a plurality of discretely arranged sub-ventilation holes for blocking impurities.
4. A protective cover for an automotive generator according to claim 3, characterized in that, The second protective cover includes a back panel and a side panel. The side panel is located around the back panel and connected to the first protective cover. The air outlet of the ventilation duct is connected to the back panel so that the airflow in the ventilation duct is directed towards the air outlet.
5. A protective cover for an automotive generator according to claim 4, characterized in that, The first heat dissipation vents are evenly distributed on the outer peripheral wall of the first protective cover, and the second heat dissipation vents are evenly distributed on the side plate of the second protective cover.
6. A protective cover for an automotive generator according to claim 5, characterized in that, The back panel includes a central portion and a peripheral portion. The distance between the central portion and the first protective cover is greater than the width of the side panel extending from the back panel to the first protective cover. The peripheral portion extends obliquely from the central portion to the side panel, so that the distance between the peripheral portion and the first protective cover gradually decreases from the inside to the outside.
7. A protective cover for an automotive generator according to claim 1, characterized in that, The ventilation duct is equipped with a filter screen to filter impurities.