High-efficiency heat dissipation device for brush starter maintenance

Abstract

This invention provides a high-efficiency heat dissipation device for brushed starter motor repair, belonging to the field of automotive starter motor repair technology. The device includes a cover-type heat dissipation body, at least one air intake port located on the outside of the body, and a closed air duct formed inside the body. The shape of the cover-type heat dissipation body is adapted to the outer contour of the components requiring heat dissipation during brushed starter motor repair, and it can completely cover and wrap around the heat-generating components to form a closed heat dissipation chamber. The air intake port is used to connect to an external compressed air source. The closed air duct is connected to the air intake port, confining the compressed air within the duct and guiding it evenly to the heat-generating surface along a preset path. This invention, through its cover-type full-wrap design and internal closed air duct structure, achieves all-round, high-efficiency forced convection heat dissipation of the brush friction area, possessing advantages such as uniform heat dissipation, high airflow utilization, stable and reliable operation, and simple structure, significantly improving the repair quality and efficiency of brushed starters.

Description

Technical Field

[0001] This utility model relates to the field of automotive starter motor repair technology, specifically to a high-efficiency heat dissipation device for brushed starter motor repair. Background Technology

[0002] The brushed starter is a core component of a car engine starting system. It works by using a DC motor to drive the engine flywheel, thus starting the engine. Key internal components of a brushed starter include the stator, rotor, commutator, and brush assembly. Current is conducted between the brushes and the commutator through sliding contact, a process that inevitably generates friction and resistance heat.

[0003] During the repair of brushed starters, especially after replacing the brush assembly or grinding the commutator surface, it is essential to ensure adequate heat dissipation in the friction area between the brushes and the commutator. This is because: firstly, the friction between the brushes and the commutator generates a significant amount of heat. If this heat cannot be dissipated in time, it may lead to brush overheating and burnout, accelerated oxidation of the commutator surface, or even secondary damage to the starter motor. Secondly, after repair, a test run is necessary to verify the quality of the repair. The heat generated during this test run also needs to be dissipated promptly; otherwise, it will affect the assessment of the repair effectiveness.

[0004] Currently, the common heat dissipation method used in maintenance sites is direct compressed air blowing, where operators hold an air gun and direct compressed air at a specific point on the brush friction area for cooling. However, this traditional heat dissipation method has the following obvious defects and shortcomings: 1. Limited heat dissipation point: Compressed airflow can usually only blow on a certain point in the brush friction area, resulting in a very limited heat dissipation area that is difficult to cover the entire heat-generating area, leading to poor heat dissipation.

[0005] 2. Low airflow utilization efficiency: Due to the lack of effective guiding and constraining structures, a large amount of airflow is dispersed and lost before it can fully contact the heating surface. The proportion of airflow actually used for cooling is very low, resulting in poor cooling efficiency and wasting compressed air energy.

[0006] 3. Uneven heat dissipation: When operating a handheld air gun, some areas are rapidly cooled by strong cold air blowing directly on them, while other areas do not dissipate heat sufficiently. This uneven heat dissipation may cause thermal stress in the components, affecting their service life and the quality of repair.

[0007] 4. Unstable airflow direction: When operating a handheld air gun, the airflow direction is easily affected by factors such as the operator's technique and breathing, resulting in fluctuations. This makes it impossible to form a stable and controllable heat dissipation flow field, leading to poor repeatability and consistency of the heat dissipation process.

[0008] Therefore, there is an urgent need for a dedicated cooling device for brushed starter maintenance that can achieve uniform, efficient, and targeted forced cooling to overcome the above-mentioned defects and improve maintenance quality and efficiency. Utility Model Content

[0009] This invention overcomes the aforementioned shortcomings of the prior art and provides a high-efficiency heat dissipation device for brushed starter motor maintenance. Its core objective is to achieve fully enclosed, directional airflow heat dissipation of the exposed friction area of ​​the starter motor brushes through structural innovation, significantly improving airflow utilization and heat dissipation uniformity, thereby enhancing maintenance quality and efficiency.

[0010] To solve the above-mentioned technical problems, this utility model provides a high-efficiency heat dissipation device for brushed starter maintenance, including: a cover-type heat dissipation body, at least one air inlet provided on the outside of the body, and a closed air duct formed inside the body.

[0011] The cover-type heat dissipation body is shaped to match the outer contour of the components that need heat dissipation during brushed starter motor maintenance. The components that need heat dissipation mainly refer to the exposed parts where the brushes and commutator are assembled. The cover-type heat dissipation body can cover and wrap around the heat-generating components like a cover or shell, forming a relatively closed heat dissipation chamber.

[0012] The air intake ports are located on the outside of the cover-type heat sink, preferably two in number, and can be used to connect to an external compressed air source. The port positions should be designed to ensure balanced airflow, and are preferably symmetrically arranged on both sides of the heat sink.

[0013] The enclosed air duct is a cavity structure formed by hollowing out the interior of the cover-type heat sink. This air duct connects to the air intake and surrounds or distributes around the areas of the components requiring heat dissipation. The shape, size, and flow direction of the air duct are designed to ensure that compressed air entering from the air intake is confined within the air duct and flows along a predetermined path to the critical areas of the heat-generating surface. The air duct design ensures almost no air leakage before the airflow reaches the target heat dissipation surface, thus achieving near 100% airflow utilization.

[0014] During operation, external compressed air enters the internal air duct through the air intake interface. Under the guidance and constraint of the air duct, a uniform, stable cooling airflow field is formed that directly acts on the entire heating surface, providing all-round and highly efficient forced convection heat dissipation for the brush friction parts.

[0015] Furthermore, the cover-type heat dissipation body is made of engineering plastic or lightweight metal materials.

[0016] Furthermore, the cover-type heat dissipation body is constructed in a modular assembly manner, which facilitates processing and assembly.

[0017] Furthermore, the enclosed air duct has multiple air outlets on one side wall near the heating element, and the air outlets are distributed in a matrix to ensure that the airflow can be evenly blown onto the entire heating arc surface.

[0018] Furthermore, the air intake interface is a standard quick connector, which facilitates quick connection and disconnection with external compressed air pipelines.

[0019] Furthermore, the inner cavity shape of the cover-type heat dissipation body is modeled after the partial outline of the starter stator and brush assembly to achieve a tight fit with the components.

[0020] This utility model provides a high-efficiency heat dissipation device for brushed starter maintenance, which has the following significant advantages: 1. Significantly improved heat dissipation efficiency and uniformity: The cover-type full-wrap design expands the heat dissipation area from the traditional "point" heat dissipation to "surface" heat dissipation, ensuring that the entire exposed friction part of the brush can be covered by cooling airflow, completely eliminating heat dissipation dead corners and achieving uniform and efficient heat dissipation effect.

[0021] 2. Extremely high airflow utilization: The unique internal hollowed-out air duct structure strictly confines the compressed air to a predetermined path leading to the heating surface, effectively preventing the airflow from diverging and being wasted in non-target areas. This allows most of the airflow kinetic energy and cooling capacity to be used for target heat dissipation, significantly improving the cooling effect.

[0022] 3. Stable and reliable operation: The device is fixedly wrapped around the component, replacing the unstable operation of a handheld air gun, forming a fixed and controllable heat dissipation environment, avoiding fluctuations in heat dissipation effect caused by human factors, and improving the consistency and reliability of maintenance operations.

[0023] 4. Simple structure and easy implementation: The device has a compact structure, few parts, and is easy to process and manufacture. It can be quickly installed and disassembled at the maintenance site, making it highly practical, low in cost, and suitable for mass production and widespread application. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of the high-efficiency heat dissipation device for brushed starter maintenance provided in this embodiment of the utility model; Figure 2 A cross-sectional schematic diagram of a high-efficiency heat dissipation device for brushed starter maintenance provided in an embodiment of this utility model; Figure 3 A schematic diagram of the working state of the high-efficiency heat dissipation device for brushed starter maintenance installed on the brushed starter maintenance component, as provided in this embodiment of the utility model. Explanation of reference numerals in the attached figures: 100 - High-efficiency heat dissipation device for brushed starter maintenance; 111 - Top cover; 112 - Bottom cover; 120 - Air inlet; 110 - Cover-type heat dissipation body; 130 - Enclosed air duct; 131 - Air outlet; 140 - Heat dissipation chamber; 150 - Clip; 160 - Brush; 200 - Starter. Detailed Implementation

[0025] Reference Figures 1 to 3 As shown, this embodiment provides a high-efficiency heat dissipation device 100 for brushed starter maintenance. The device mainly includes three core components: a cover-type heat dissipation body 110, an air intake interface 120, and a closed air duct 130.

[0026] 1. Cover-type heat dissipation body 110 The cover-type heat dissipation body 110 is the basic framework of the device. Its overall shape is arc-shaped or box-shaped, and its shape is adapted to the outer contour of the components that need heat dissipation during brushed starter maintenance (mainly referring to the exposed parts of the brush and commutator assembly). Specifically, the inner cavity shape of the cover-type heat dissipation body 110 is modeled after the partial outer contour of the starter stator and brush assembly, and can cover and wrap around the heat-generating components like a cover or shell, forming a relatively closed heat dissipation chamber 140.

[0027] The cover-type heat dissipation body 110 is preferably made of engineering plastics (such as nylon, polyoxymethylene, etc.) or lightweight metals (such as aluminum alloy), which ensures sufficient structural strength while reducing the overall weight, making it easy for operators to carry and install. In this embodiment, the cover-type heat dissipation body 110 is constructed in a split assembly manner, that is, it is composed of an upper cover 111 and a lower cover 112 connected by snaps or bolts. The advantage of this design is that it facilitates the processing and molding of the internal air duct and subsequent cleaning and maintenance. As a specific embodiment of this utility model, in order to facilitate the connection between the upper cover 111 and the lower cover 112, the two parts of the upper cover 111 and the lower cover 112 are connected by snaps 150.

[0028] 2. Air intake interface 120 The air intake interface 120 is located on the outer side of the cover-type heat dissipation body 110. In this embodiment, there are two air intake interfaces 120, symmetrically arranged on the left and right sides of the cover-type heat dissipation body 110. This symmetrical layout ensures air pressure balance when two compressed air streams enter simultaneously, avoiding uneven airflow caused by unilateral air intake. The air intake interface 120 is preferably a standard quick connector, such as a quick-connect air hose connector, which facilitates quick connection and disconnection with external compressed air lines, improving the work efficiency at the maintenance site.

[0029] 3. Enclosed air duct 130 The closed air duct 130 is the core innovation of this utility model. The closed air duct 130 is a cavity structure formed by hollowing out the inside of the cover-type heat dissipation body 110. Specifically, corresponding grooves are opened on the combined surfaces of the upper cover 111 and the lower cover 112. When the two are closed, a complete closed air duct 130 is formed.

[0030] The inlet of the closed air duct 130 is connected to the air intake port 120, and the main body of the air duct surrounds or is distributed around the component area that needs to be cooled. The shape, size and flow direction of the closed air duct 130 are carefully designed to ensure that the compressed air entering from the air intake port 120 can be strictly confined within the closed air duct 130 and flow along a preset path to the critical area of ​​the heat-generating surface.

[0031] Specifically, the enclosed air duct 130 has multiple air outlets 131 on one side wall near the heat-generating component (i.e., the side facing the friction area between the brush and the commutator). These air outlets 131 are distributed in a matrix, that is, they are evenly arranged according to a certain row spacing and column spacing to ensure that the airflow can be evenly blown to the entire heat-generating arc surface, avoiding the existence of local overcooling or heat dissipation dead zones.

[0032] Example 2: Working Process Reference Figure 3 As shown, this embodiment describes the specific working process of the above-mentioned heat dissipation device.

[0033] During maintenance, the cover plate heat dissipation body 110 of this device is first fastened to the corresponding part of the starter 200. Specifically, the inner cavity of the cover plate heat dissipation body 110 is aligned with the friction area between the brush 160 and the commutator, so that it completely covers and wraps the heat-generating component, forming a relatively closed heat dissipation chamber 140.

[0034] Next, connect the external compressed air hose to the air inlet 120. Since the air inlet 120 uses a standard quick-connect design, the operator only needs to insert the hose connector to complete the connection; no tools are required, making the operation very convenient.

[0035] Next, the external air source is turned on. Compressed air enters the internal closed air duct 130 through the air inlet 120. Under the constraint and guidance of the closed air duct 130, the compressed air flows along a predetermined path and is finally sprayed evenly and centrally from multiple matrix-type air outlets 131 opened on the air duct wall onto the working surfaces of the brush 160 and the commutator for efficient cooling.

[0036] Since the airflow is confined within the closed heat dissipation chamber 140 and the closed air duct 130, there is almost no leakage. Therefore, most of the kinetic energy and cooling capacity of the airflow are used for target heat dissipation, the airflow utilization rate is close to 100%, and the cooling effect is rapid and uniform.

[0037] After the maintenance work is completed, simply turn off the air supply, disconnect the air pipe connector, and remove the cover-type heat sink 110 from the starter 200. The whole process is simple and quick.

[0038] Example 3: Application Effect Verification At a certain automotive repair training base, a comparative test was conducted between the cooling device provided by this utility model and the traditional compressed air direct blowing method. The test conditions were: the same model of brushed starter, the same degree of brush wear, the same ambient temperature (25℃), and the same cooling time (60 seconds).

[0039] The experimental results are shown in Table 1 below:

[0040] The above test data show that the heat dissipation device provided by this utility model is significantly superior to the traditional method in terms of heat dissipation efficiency, uniformity, energy saving and operational consistency, and has extremely high practical value.

[0041] Example 4: Variant Example Based on the above embodiments, the present invention can also have the following modifications: Variant 1: The number of air intake ports 120 can be set to one or more according to actual needs. For example, for small starters, only one air intake port can be set; for large starters, three or four air intake ports can be set to increase the air intake volume.

[0042] Variation 2: The shape of the air outlet 131 can be circular, oval, elongated, or irregularly shaped, and is not limited to circular holes.

[0043] Variant 3: The cover-type heat dissipation body 110 can be manufactured using a one-piece molding process, such as injection molding or 3D printing, to simplify the production process.

[0044] Variant 4: Guide fins or turbulence columns can be added to the inner wall of the cover plate heat dissipation body 110 to further enhance the heat exchange effect.

[0045] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-efficiency heat dissipation device for brush starter repair, characterized in that, include: The heat dissipation body is a cover plate type, at least one air intake port is provided on the outside of the body, and a closed air duct is formed inside the body; The cover-type heat dissipation body is shaped to match the outer contour of the component that needs heat dissipation during brushed starter maintenance, and can completely cover and wrap around the periphery of the component that needs heat dissipation, forming a relatively closed heat dissipation chamber. The air intake port is located on the outside of the cover-type heat dissipation body and is used to connect to an external compressed air source; The enclosed air duct is a cavity structure formed by hollowing out the interior of the cover plate heat dissipation body. The air duct is connected to the air intake interface and surrounds or is distributed around the component area that needs heat dissipation. The compressed air entering from the air intake interface is constrained in the air duct and flows to the key area of ​​the heat-generating surface along a preset path.

2. The high-efficiency heat dissipating device of claim 1, wherein, The cover-type heat dissipation body is made of engineering plastic or lightweight metal materials.

3. The high-efficiency heat dissipating device of claim 1, wherein, The cover-type heat dissipation body is constructed in a split assembly manner, consisting of an upper cover and a lower cover connected by buckles or bolts.

4. The high efficiency heat dissipating device of claim 1, wherein, There are two air intake ports, symmetrically arranged on the left and right sides of the cover-type heat dissipation body to ensure air pressure balance.

5. The high efficiency heat dissipating device of claim 1, wherein, The air intake interface is a standard quick connector, used for quick connection and disconnection with external compressed air lines.

6. The high efficiency heat dissipating device of claim 1, wherein, The enclosed air duct has multiple air outlets on one side wall near the component that needs heat dissipation. The air outlets are distributed in a matrix to ensure that the airflow can be evenly directed to the entire heating arc surface.

7. The high efficiency heat dissipating device of claim 6, wherein, The air outlet can be circular, elliptical, elongated, or irregularly shaped.

8. The high efficiency heat dissipating device of claim 1, wherein, The inner cavity shape of the cover-type heat dissipation body is modeled after the partial outline of the starter stator and brush assembly to achieve a tight fit with the components.

9. The high efficiency heat dissipating device of claim 1, wherein, The cover-type heat dissipation body is manufactured using a one-piece molding process, including injection molding or 3D printing.

10. The high efficiency heat dissipating device of claim 1, wherein, The inner wall of the cover-type heat dissipation body is provided with flow guiding fins or turbulence columns to enhance the heat exchange effect.

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