A powder metallurgy crankshaft signal wheel for automobile engines

Abstract

This utility model relates to the field of signal wheel technology, and provides a signal wheel for a powder metallurgy crankshaft of an automotive engine. The signal wheel includes a signal wheel body with a positioning structure inside. The positioning structure includes a through hole penetrating the interior of the signal wheel body, and a keyway is formed inside the signal wheel body on one side of the through hole. By providing the positioning structure, the keyway engages with a key on the crankshaft to transmit the crankshaft torque, ensuring that the signal wheel rotates synchronously with the crankshaft and avoiding signal deviation caused by relative slippage. The through hole creates an interference fit between the keyway and the crankshaft, and the positioning groove ensures accurate installation of the signal wheel body, thus facilitating installation and improving the applicability of the powder metallurgy crankshaft signal wheel for automotive engines.

Description

Technical Field

[0001] This utility model relates to the field of signal wheel technology, and in particular to a powder metallurgy crankshaft signal wheel for an automobile engine. Background Technology

[0002] A powder metallurgy crankshaft signal wheel is a key component made by pressing and sintering metal powder. It is usually installed at the front end of the crankshaft and is used in conjunction with a crankshaft position sensor. Therefore, a powder metallurgy crankshaft signal wheel for automobile engines is used.

[0003] To address this, patent CN216951540U discloses a powder metallurgy signal wheel for automotive engines, comprising a signal wheel body. The signal wheel body includes a first signal tooth, a first wheel body, a second wheel body, and a second signal tooth. A central hole is formed at the center of the surface of both the first and second wheel bodies. An assembly hole is formed outside the central hole, a weight-reducing hole is formed outside the assembly hole, and a mounting hole is formed outside the weight-reducing hole. A first threaded hole is formed below the mounting hole. A strip-shaped mounting groove is formed on one side surface of both the first and second wheel bodies. A mounting block is installed between the strip-shaped mounting groove on the first wheel body and the strip-shaped mounting groove on the second wheel body. This invention facilitates the replacement of damaged first and second signal teeth, avoiding the need for complete replacement due to damage to either the first or second signal tooth, thus reducing usage costs and demonstrating strong practicality.

[0004] Although the powder metallurgy signal wheel for automobile engines avoids the situation where the entire invention needs to be replaced due to damage to the first or second signal tooth, its applicability is low because it is inconvenient to position and install with the crankshaft. Utility Model Content

[0005] The purpose of this invention is to provide a signal wheel for a powder metallurgy crankshaft of an automobile engine, in order to solve the problem of inconvenient positioning of existing signal wheels for powder metallurgy crankshafts of automobile engines.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a powder metallurgy crankshaft signal wheel for an automobile engine, comprising a signal wheel body;

[0007] The signal wheel body is equipped with a positioning structure inside;

[0008] The positioning structure includes a through hole penetrating the interior of the signal wheel body, a keyway is provided inside the signal wheel body on one side of the through hole, and a positioning groove is provided on one side of the bottom of the signal wheel body;

[0009] The outer side of the signal wheel body is provided with a protective structure.

[0010] When using this device, the positioning structure facilitates its installation, thereby improving the applicability of the automotive engine powder metallurgy crankshaft signal wheel; the protective structure also facilitates corrosion prevention, thus extending the service life of the automotive engine powder metallurgy crankshaft signal wheel.

[0011] Preferably, the signal wheel body forms an interference fit with the crankshaft through a through hole. Under the action of the keyway, it engages with the key on the crankshaft to transmit the crankshaft torque, ensuring that the signal wheel body rotates synchronously with the crankshaft and avoiding signal deviation caused by relative slippage.

[0012] Preferably, the centerline of the through hole is collinear with the centerline of the signal wheel body. The through hole enables the keyway and crankshaft to form an interference fit structure.

[0013] Preferably, the main cross-section of the positioning groove is circular. The positioning groove ensures accurate installation of the signal wheel body at the correct angle, thus facilitating its installation.

[0014] Preferably, the protective structure includes a galvanized layer, a high-temperature resistant coating, and an anti-corrosion coating. The galvanized layer is fixed to the outside of the signal wheel body, the outside of the galvanized layer is provided with a high-temperature resistant coating, and the outside of the high-temperature resistant coating is provided with an anti-corrosion coating.

[0015] Preferably, the high-temperature resistant coating is actually a ceramic coating. Under the action of the zinc plating layer, the signal wheel body can be protected, preventing rust and corrosion. Simultaneously, it provides a stable adhesion surface. Under the action of the high-temperature resistant coating, the signal wheel body is prevented from deforming or aging due to high temperatures.

[0016] Preferably, the anti-corrosion coating is actually an epoxy resin coating. Under the action of the anti-corrosion coating, corrosive media such as engine oil and fuel combustion products are further isolated, enhancing the corrosion resistance of the signal wheel body and thus extending its service life.

[0017] The advantages of the powder metallurgy crankshaft signal wheel for automobile engines provided by this utility model are as follows:

[0018] By incorporating a positioning structure, the signal wheel engages with the key on the crankshaft via a keyway to transmit crankshaft torque, ensuring that the signal wheel rotates synchronously with the crankshaft and preventing signal deviation caused by relative slippage. The through-hole allows the keyway and crankshaft to form an interference fit structure, and the positioning groove ensures accurate installation angle of the signal wheel, facilitating its installation. This facilitates the installation of the device and improves its applicability in the use of the automotive engine powder metallurgy crankshaft signal wheel.

[0019] By incorporating a protective structure, the galvanized layer protects the signal wheel body from rust and corrosion, while also providing a stable adhesion surface. The high-temperature resistant coating prevents deformation and material aging due to high temperatures. Furthermore, the anti-corrosion coating isolates the signal wheel from corrosive media such as engine oil and fuel combustion products, enhancing its corrosion resistance and extending its service life. This device effectively prevents corrosion and improves the service life of the automotive engine powder metallurgy crankshaft signal wheel. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0021] Figure 2 This is a top-view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0025] The following are the annotations in the figure: 1. Signal wheel body; 2. Positioning structure; 201. Keyway; 202. Through hole; 203. Positioning groove; 3. Protective structure; 301. Galvanized layer; 302. High temperature resistant coating; 303. Anti-corrosion coating. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5This utility model provides a signal wheel for a powder metallurgy crankshaft of an automobile engine, including a signal wheel body 1. The signal wheel body 1 has a positioning structure 2 inside. The positioning structure 2 includes a through hole 202 penetrating the inside of the signal wheel body 1. A keyway 201 is opened inside the signal wheel body 1 on one side of the through hole 202. A positioning groove 203 is opened on one side of the bottom of the signal wheel body 1. The signal wheel body 1 and the crankshaft form an interference fit structure through the through hole 202. The centerline of the through hole 202 is collinear with the centerline of the signal wheel body 1. The main view cross section of the positioning groove 203 is circular.

[0028] Reference Figure 1 and Figure 2 As shown, under the action of the keyway 201, it cooperates with the key on the crankshaft to transmit the torque of the crankshaft, ensuring that the signal wheel body 1 rotates synchronously with the crankshaft and avoiding signal deviation caused by relative slippage. Under the action of the through hole 202, the keyway 201 and the crankshaft form an interference fit structure, making the center line of the keyway 201 collinear with the center line of the crankshaft. Under the action of the positioning groove 203, the installation angle of the signal wheel body 1 can be accurately ensured, thereby facilitating the installation of the signal wheel body 1.

[0029] A protective structure 3 is provided on the outer side of the signal wheel body 1. The protective structure 3 includes a galvanized layer 301, a high-temperature resistant coating 302, and an anti-corrosion coating 303. The galvanized layer 301 is fixed to the outer side of the signal wheel body 1. The high-temperature resistant coating 302 is provided on the outer side of the galvanized layer 301. The anti-corrosion coating 303 is provided on the outer side of the high-temperature resistant coating 302. The high-temperature resistant coating 302 is actually a ceramic coating, and the anti-corrosion coating 303 is actually an epoxy resin coating.

[0030] Reference Figure 2 and Figure 3 As shown, the galvanized layer 301 protects the signal wheel body 1, preventing it from rusting and corroding, and provides a stable adhesion surface. The high-temperature resistant coating 302, which is actually a ceramic coating, prevents the signal wheel body 1 from deforming or aging due to high temperatures. The anti-corrosion coating 303, which is actually an epoxy resin coating, further isolates corrosive media such as engine oil and fuel combustion products, enhancing the corrosion resistance of the signal wheel body 1 and thus extending its service life.

[0031] 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 signal wheel for a powder metallurgy crankshaft of an automobile engine, comprising a signal wheel body (1); Its features are: The signal wheel body (1) is provided with a positioning structure (2) inside; The positioning structure (2) includes a through hole (202) penetrating the interior of the signal wheel body (1), a keyway (201) is provided inside the signal wheel body (1) on one side of the through hole (202), and a positioning groove (203) is provided on one side of the bottom of the signal wheel body (1). The outer side of the signal wheel body (1) is provided with a protective structure (3).

2. The automobile engine powder metallurgy crankshaft signal wheel according to claim 1, characterized in that: The signal wheel body (1) forms an interference fit structure with the crankshaft through the through hole (202).

3. The automobile engine powder metallurgy crankshaft signal wheel according to claim 1, characterized in that: The centerline of the through hole (202) is collinear with the centerline of the signal wheel body (1).

4. The automobile engine powder metallurgy crankshaft signal wheel according to claim 1, characterized in that: The main view of the positioning groove (203) is circular.

5. The automobile engine powder metallurgy crankshaft signal wheel according to claim 1, characterized in that: The protective structure (3) includes a galvanized layer (301), a high-temperature resistant coating (302), and an anti-corrosion coating (303). The galvanized layer (301) is fixed to the outside of the signal wheel body (1). The high-temperature resistant coating (302) is provided on the outside of the galvanized layer (301), and the anti-corrosion coating (303) is provided on the outside of the high-temperature resistant coating (302).

6. The automobile engine powder metallurgy crankshaft signal wheel according to claim 5, characterized in that: The high-temperature resistant coating (302) is actually a ceramic coating.

7. The automobile engine powder metallurgy crankshaft signal wheel according to claim 5, characterized in that: The anti-corrosion coating (303) is actually an epoxy resin coating.

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