A magneto cover capable of miniaturization design

Abstract

The application relates to the technical field of magneto, and discloses a miniaturized magneto cover, which comprises a motor cover; a boss for fixing a magneto stator is arranged in the motor cover; at least two screw hole mounting parts are arranged on the outer circumferential side of the boss; and a space avoiding structure extending in the up-down direction of the screw hole mounting part is arranged on the outer circumferential side of each screw hole mounting part. The miniaturized magneto cover provided by the application can make the inner and outer diameters of the magneto stator smaller by arranging the space avoiding structure extending in the up-down direction of the screw hole mounting part on the outer circumferential side of each screw hole mounting part, so that the corresponding profile of the magneto cover can also be made smaller, the miniaturization and light weight design of the parts and the engine are achieved, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic motors, and in particular to a magnetic motor cover capable of being miniaturized. Background Art

[0002] A magneto is a small AC generator that uses permanent magnets to generate a magnetic field. It is the ignition power source in a gasoline engine ignition system. Figures 4-5 As shown, the existing magneto includes a motor cover 1, a boss 2, a magneto stator 5, a screw hole mounting portion 3 and a bolt 6; the magneto stator is placed on the boss and fixed to the magneto stator by the bolts and the screw hole mounting portion; to ensure strength, the wall thickness of the screw hole mounting portion is ≥ 2.5 mm; however, with this design, the inner diameter of the magneto stator and the motor cover are easily limited by the wall thickness of the screw hole mounting portion, and miniaturization design is impossible, which is not conducive to the miniaturization and lightweight design of components and engines. Summary of the Invention

[0003] The purpose of the present invention is to overcome the problems of the prior art and provide a magneto cover with a miniaturized design that can minimize and lighten the design of components and engines.

[0004] In order to achieve the above object, the present invention adopts the following scheme:

[0005] A magneto cover with a miniaturized design includes a motor cover; a boss for fixing the magneto stator is provided inside the motor cover; at least two screw hole mounting portions are provided on the outer circumference of the boss; and a space avoidance structure extending in the upper and lower directions of the screw hole mounting portion is provided on the outer circumference of each screw hole mounting portion.

[0006] Furthermore, the space avoidance structure is an arc groove provided on the outer peripheral side of the screw hole mounting portion and extending downwardly along the upper end surface of the screw hole mounting portion by removing material.

[0007] Furthermore, the screw hole mounting portion is cylindrical; the distance between the outer peripheral side surface of the screw hole mounting portion and the groove side surface of the space avoidance structure is 1-2.5 mm.

[0008] Furthermore, the connection between the bottom surface of the space avoidance structure and the outer peripheral side of the screw hole mounting portion is arranged in a rounded corner.

[0009] Furthermore, the screw hole mounting portion has a light hole and a screw hole for matching with a bolt along its upper and lower directions; the light hole is located above the screw hole and is connected to the screw hole.

[0010] Furthermore, the diameter of the light hole is larger than the diameter of the screw hole.

[0011] Further, the bottom surface of the light hole is lower than the bottom surface of the space avoiding structure.

[0012] Further, the thickness of the hole wall of the screw hole to the outer peripheral side of the screw hole mounting portion is greater than or equal to 2.5 mm.

[0013] Further, the number of the screw hole mounting portions is at least two; and the at least two screw hole mounting portions are uniformly distributed on the outer peripheral side of the boss.

[0014] Further, the motor cover is provided with a plurality of reinforcing ribs connected to the boss and uniformly distributed around the boss.

[0015] Further, the upper end surface of the screw hole mounting portion is flush with the upper end surface of the boss.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] By arranging the space avoiding structure extending in the up-down direction of the screw hole mounting portion on the outer peripheral side of each screw hole mounting portion, the present application can make the inner and outer diameters of the magnetic motor stator smaller, and accordingly make the profile of the magnetic motor cover smaller, so as to achieve the minimum size and light weight design of the parts and the engine, and save the cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0019] Figure 1 is a partial sectional structure schematic view of the miniaturizable design magnetic motor cover, magnetic motor stator and bolt of the present application.

[0020] Figure 2 is Figure 1 is an enlarged view of part A shown in the figure.

[0021] Figure 3 is a three-dimensional structure schematic view of the miniaturizable design magnetic motor cover of the present application.

[0022] Figure 4 is a partial sectional structure schematic view of the magnetic motor cover, magnetic motor stator and bolt of the prior art.

[0023] Figure 5 is Figure 4 is an enlarged view of part B shown in the figure.

[0024] The figure includes:

[0025] The motor cover 1, the boss 2, the screw hole mounting portion 3, the light hole 31, the screw hole 32, the space avoiding structure 4, the chamfer 41, the magnetic motor stator 5, the bolt 6, and the reinforcing rib 7. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] like Figures 1 to 3 As shown, a miniaturized magneto cover includes a motor cover 1; a boss 2 is provided within the motor cover 1 for securing a magneto stator 5; at least two screw mounting portions 3 are provided on the outer periphery of the boss 2; the screw mounting portions 3 are cylindrical, having a good appearance and occupying a small space. Each screw mounting portion 3 is provided with a space avoidance structure 4 extending vertically along the outer periphery of the screw mounting portion 3.

[0028] The miniaturized magneto cover places the magneto stator 5 on the boss 2 and fixes the magneto stator 5 through bolts 6 and screw hole mounting portions 3. A space avoidance structure 4 extending in the upper and lower directions of the screw hole mounting portions 3 is provided on the outer peripheral side of each screw hole mounting portion 3, so that the inner and outer diameters of the magneto stator 5 can be designed to be smaller, and the corresponding profile of the magneto cover 1 can also be made smaller, thereby achieving the miniaturization and lightweight design of components and engines, and further saving costs.

[0029] The upper end surface of the screw hole mounting portion 3 is flush with the upper end surface of the boss 2. The space avoidance structure 4 is a circular arc groove provided on the outer circumference of the screw hole mounting portion 3 and extending downward along the upper end surface of the screw hole mounting portion 3 by removing material. The cross-section of the circular arc groove along the axis of the screw hole mounting portion 3 is L-shaped. By using the circular arc groove as the space avoidance structure 4, space can be saved at the screw hole mounting portion 3, allowing the inner and outer diameters of the magneto stator 5 to be designed to be smaller, thereby making the corresponding profile of the magneto cover 1 smaller, achieving a minimized and lightweight design of components and the engine.

[0030] Specifically, the screw hole mounting portion is cylindrical; the distance between the outer circumference of the screw hole mounting portion and the side of the slot of the spatial avoidance structure is 1-2.5 mm. By adjusting the distance between the outer circumference of the screw hole mounting portion and the side of the slot of the spatial avoidance structure, the inner and outer diameters of the magneto stator 5 can be designed to be smaller, facilitating assembly, achieving a miniaturized and lightweight design of components and the engine, and further reducing costs.

[0031] Preferably, the connection between the bottom surface of the space avoidance structure 4 and the outer circumference of the screw hole mounting portion 3 is provided with a rounded corner 41. By providing the connection between the bottom surface of the space avoidance structure 4 and the outer circumference of the screw hole mounting portion 3 with a rounded corner 41, it is possible to prevent the connection between the two from scratching the magnetic motor stator 5 to be installed, thereby providing good protection for the magnetic motor stator 5.

[0032] In the specific embodiment, the screw hole mounting portion 3 has a light hole 31 and a screw hole 32 for connecting with the bolt 6 along the up-down direction thereof; the light hole 31 is located above the screw hole 32 and communicates with the screw hole 32. Due to the space avoiding structure 4, the wall thickness of the screw hole mounting portion 3 corresponding to the space avoiding structure 4 is thin, and by arranging the light hole 31 above the screw hole 32, the wall thickness of the screw hole mounting portion 3 at this position is ensured not to be affected by the fastening torque of the bolt 6, thereby avoiding the risk of rupture.

[0033] Preferably, the diameter of the light hole 31 is greater than the diameter of the screw hole 32. By arranging the diameter of the light hole 31 to be greater than the diameter of the screw hole 32, the wall thickness of the screw hole mounting portion 3 at this position is ensured not to be affected by the fastening torque of the bolt 6, thereby avoiding the risk of rupture.

[0034] In order to ensure the strength of the wall thickness of the screw hole mounting portion 3 corresponding to the screw hole 32 and avoid the risk of rupture of the wall thickness of the screw hole mounting portion 3 corresponding to the screw hole 32 due to the fastening torque of the bolt 6, the bottom surface of the light hole 31 is lower than the bottom surface of the space avoiding structure 4. By arranging the bottom surface of the light hole 31 to be lower than the bottom surface of the space avoiding structure 4, the strength of the wall thickness of the screw hole mounting portion 3 corresponding to the screw hole 32 is facilitated to be ensured.

[0035] In order to ensure the strength of the wall thickness of the screw hole mounting portion 3 corresponding to the screw hole 32 and avoid the risk of rupture of the wall thickness of the screw hole mounting portion 3 corresponding to the screw hole 32 due to the fastening torque of the bolt 6, the thickness of the hole wall of the screw hole 32 to the outer peripheral side of the screw hole mounting portion 3 is greater than or equal to 2.5 mm.

[0036] In the specific embodiment, the number of the screw hole mounting portion 3 is at least two; the at least two screw hole mounting portions 3 are uniformly distributed on the outer peripheral side of the boss 2, and in combination with the corresponding number of bolts 6, the magnetic motor stator 5 can be stably mounted on the boss 2. Specifically, the number of the screw hole mounting portion 3 is three; the three screw hole mounting portions 3 are uniformly distributed on the outer peripheral side of the boss 2. By arranging three screw hole mounting portions 3, the corresponding bolts 6 also have three, thereby ensuring that the magnetic motor stator 5 is stably mounted on the boss 2.

[0037] In order to strengthen the strength and hardness of the motor cover 1 and improve the durability, a plurality of reinforcing ribs 7 are arranged in the motor cover 1 and connected with the boss 2 and uniformly distributed around the boss 2.

[0038] In summary, the embodiments of the present invention provide a magneto cover with a miniaturized design, wherein the magneto cover with a miniaturized design places the magneto stator 5 on the boss 2, and fixes the magneto stator 5 by means of bolts 6 and screw hole mounting portions 3. A space avoidance structure 4 extending in the vertical direction of the screw hole mounting portion 3 is provided on the outer peripheral side of each screw hole mounting portion 3, so that the inner and outer diameters of the magneto stator 5 can be designed to be smaller, thereby making the corresponding profile of the magneto cover 1 also smaller, thereby achieving a miniaturized and lightweight design of components and engines, and further saving costs.

[0039] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. A magneto cover capable of miniaturization design, characterized in that: The motor cover comprises a boss for fixing the stator of the magnetic motor; the boss is provided with at least two screw hole mounting portions on the outer circumference thereof; each screw hole mounting portion is provided with a space avoidance structure extending in the vertical direction of the screw hole mounting portion on the outer circumference thereof, and the space avoidance structure is spaced apart from the stator of the magnetic motor in the radial direction; The screw hole mounting portion has a light hole and a screw hole for matching with a bolt along its upper and lower directions; the light hole is located above the screw hole and is connected to the screw hole, and the bottom surface of the light hole is lower than the bottom surface of the space avoidance structure.

2. The miniaturized magneto cover according to claim 1, characterized in that: The space avoidance structure is an arc groove provided on the outer peripheral side of the screw hole mounting portion and extending downwardly by removing material along the upper end surface of the screw hole mounting portion.

3. The miniaturized magneto cover according to claim 2, characterized in that: The screw hole mounting portion is cylindrical; the distance between the outer peripheral side surface of the screw hole mounting portion and the groove side surface of the space avoidance structure is 1-2.5 mm.

4. The miniaturized magneto cover according to claim 1 or 2, characterized in that: The connection between the bottom surface of the space avoidance structure and the outer peripheral side of the screw hole installation portion is arranged in a rounded shape.

5. The miniaturized magneto cover according to claim 1, characterized in that: The diameter of the light hole is larger than the diameter of the screw hole.

6. The miniaturized magneto cover according to claim 1, characterized in that: The thickness from the hole wall of the screw hole to the outer peripheral side of the screw hole mounting portion is greater than or equal to 2.5 mm.

7. The miniaturized magneto cover according to any one of claims 1 to 3, characterized in that: The upper end surface of the screw hole mounting portion is flush with the upper end surface of the boss; the number of the screw hole mounting portions is at least 2; and at least 2 screw hole mounting portions are evenly distributed on the outer peripheral side of the boss.

8. The miniaturized magneto cover according to claim 1, characterized in that: A plurality of reinforcing ribs connected to the boss and evenly distributed around the boss are provided in the motor cover.

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