Position sensor rotor with high oil resistance resistance

Abstract

The invention relates to the technical field of position sensor rotors, and discloses a position sensor rotor with high oil resistance resistance, the position sensor rotor comprises an upper metal sheet, a non-metal filling base and a lower metal sheet, the upper end face of the non-metal filling base is provided with an upper groove, the upper metal sheet is embedded in the upper groove, and the lower metal sheet is embedded in the lower groove. A lower groove is formed in the bottom end face of the non-metal filling base, the lower metal sheet is embedded in the lower groove, the upper metal sheet and the lower metal sheet are both fixed to the non-metal filling base in a hot melting press fit or potting or pouring mode, and the upper metal sheet, the non-metal filling base and the lower metal sheet are matched to form a cylindrical structure. According to the invention, the overall weight of the rotor can be better reduced, the amount of metal scraps generated during manufacturing is reduced, the manufacturing and production cost can be reduced, the power loss caused by the motor rotating shaft provided with the position sensor rotor can be reduced, and the overall structure is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of position sensor rotors, and more particularly to a position sensor rotor with high oil resistance performance. Background Art

[0002] The eddy current position sensor for detecting angle position currently used in motors (drive motors used in passenger cars, two-wheeled vehicles and engineering machinery) needs to install an induction target wheel (rotor) at the end of the motor shaft to detect the motor rotation angle in conjunction with the rotation of the motor shaft and output a solution signal to the control unit. In the prior art, the rotor of this application method is usually made of a whole piece of metal material by metal machining, wire cutting, stamping or die casting, and is usually in the shape of an impeller to reduce the overall weight (such as Figure 6 However, this rotor has the following disadvantages: 1. Since the raw materials are all metal, a large amount of metal waste is generated during stamping, resulting in high manufacturing costs.

[0003] 2. If used in an oil environment, the impeller-shaped rotor will be subject to greater oil resistance during operation, resulting in certain power loss to the motor shaft equipped with the position sensor rotor. Based on this, the present invention designs a position sensor rotor with high resistance to oil resistance to solve the above problem. Summary of the invention

[0004] The object of the present invention is to provide a position sensor rotor with high resistance to oil resistance, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A position sensor rotor with high resistance to oil resistance comprises an upper metal sheet, a non-metallic filling base and a lower metal sheet, wherein the upper end surface of the non-metallic filling base is provided with an upper groove, the upper metal sheet is embedded in the upper groove, the bottom end surface of the non-metallic filling base is provided with a lower groove, the lower metal sheet is embedded in the lower groove, the upper metal sheet and the lower metal sheet are both fixed to the non-metallic filling base by hot-melt pressing, potting or casting, and the upper metal sheet, the non-metallic filling base and the lower metal sheet cooperate to form a cylindrical structure.

[0006] As a preferred technical solution of the present invention, a first axial hole is opened on the surface of the upper metal sheet, a second axial hole is opened on the surface of the non-metallic filling base, and a third axial hole is opened on the surface of the lower metal sheet. The first axial hole, the second axial hole and the third axial hole cooperate to form an axial mounting hole.

[0007] As a preferred technical solution of the present invention, the diameters of the first axial hole, the second axial hole and the third axial hole are all the same.

[0008] As a preferred technical solution of the present invention, the upper metal sheet and the lower metal sheet have the same structure and are shaped like impellers.

[0009] As a preferred technical solution of the present invention, the thickness of the upper metal sheet and the lower metal sheet are both 0.035mm-1mm.

[0010] As a preferred technical solution of the present invention, the upper metal sheet and the lower metal sheet are both components made of copper, aluminum or stainless steel.

[0011] As a preferred technical solution of the present invention, the non-metallic filling base is a component made of glass fiber reinforced PPS or PA66 material.

[0012] As a preferred technical solution of the present invention, the thickness of the non-metallic filling base is 3mm-5mm.

[0013] As a preferred technical solution of the present invention, the non-metallic filling base is a component made of FR epoxy resin material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides an upper groove on the upper end surface of the non-metallic filling base, an upper metal sheet is embedded in the upper groove, and a lower groove is provided on the bottom end surface of the non-metallic filling base, a lower metal sheet is embedded in the lower groove, the upper metal sheet and the lower metal sheet are both fixed to the non-metallic filling base by hot-melt pressing, potting or casting, and the non-metallic filling base is used as the rotor body, so as to better reduce the overall weight of the rotor, reduce the amount of metal waste generated during manufacturing, and help reduce manufacturing costs.

[0015] 2. The present invention forms a cylindrical structure by combining an upper metal sheet, a non-metallic filling base and a lower metal sheet. If used in an oil environment, it is beneficial to reduce the oil resistance encountered by the rotor during operation without affecting the accuracy and quality of the output angle, so that the position sensor rotor has high resistance to oil resistance, thereby reducing the power loss caused to the motor shaft equipped with the position sensor rotor, so that the overall structure is optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a position sensor rotor with high oil resistance performance according to the present invention; Figure 2 It is a schematic diagram of the exploded structure of a position sensor rotor with high resistance to oil resistance from a first perspective according to the present invention; Figure 3 A schematic diagram of an exploded structure from a second perspective of a position sensor rotor with high resistance to oil resistance according to the present invention; Figure 4 It is a schematic cross-sectional structure diagram of a position sensor rotor with high oil resistance performance according to the present invention; Figure 5 It is a three-dimensional structural schematic diagram of a position sensor rotor with high oil resistance performance mounted on a motor shaft according to the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of a position sensor rotor in the prior art.

[0017] In the figure: 1, upper metal sheet; 101, first axial hole; 2, non-metallic filling base; 201, upper groove; 202, lower groove; 203, second axial hole; 3, lower metal sheet; 301, third axial hole; 4, motor shaft. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: like Figures 1 to 5 As shown, the present invention provides a position sensor rotor with high resistance to oil resistance, including an upper metal sheet 1, a non-metallic filling base 2 and a lower metal sheet 3. The upper end surface of the non-metallic filling base 2 is provided with an upper groove 201, and the upper metal sheet 1 is embedded in the upper groove 201. The bottom end surface of the non-metallic filling base 2 is provided with a lower groove 202, and the lower metal sheet 3 is embedded in the lower groove 202. The upper metal sheet 1 and the lower metal sheet 3 are both hot-melt pressed, potted or cast with the non-metallic filling base 2. The non-metallic filling base 2 is used as the rotor body, so as to better reduce the overall weight of the rotor and reduce the amount of metal waste generated during manufacturing. The upper metal sheet 1, the non-metallic filling base 2 and the lower metal sheet 3 cooperate to form a cylindrical structure. If used in an oil environment, it is beneficial to reduce the oil resistance encountered by the rotor during operation.

[0020] Among them, Figure 4 and Figure 5As shown, a first axial hole 101 is provided on the surface of the upper metal sheet 1, a second axial hole 203 is provided on the surface of the non-metallic filling base 2, and a third axial hole 301 is provided on the surface of the lower metal sheet 3. The first axial hole 101, the second axial hole 203 and the third axial hole 301 cooperate to form an axial mounting hole, and the motor shaft 4 can be passed through the rotor through the axial mounting hole and assembled using a polyimide adhesive.

[0021] Among them, Figure 4 As shown, the diameters of the first shaft hole 101 , the second shaft hole 203 and the third shaft hole 301 are all the same.

[0022] Among them, Figure 2 and Figure 3 As shown, the upper metal sheet 1 and the lower metal sheet 3 have the same structure and are shaped like impellers, thereby achieving the purpose of further reducing the weight of the upper metal sheet 1 and the lower metal sheet 3.

[0023] Among them, Figure 2 and Figure 3 As shown, the thickness of the upper metal sheet 1 and the lower metal sheet 3 are both 0.035mm-1mm.

[0024] Among them, Figure 2 and Figure 3 As shown, the upper metal sheet 1 and the lower metal sheet 3 are both components made of copper, aluminum or stainless steel, and the non-metallic filling base 2 is a component made of glass fiber reinforced PPS or PA66 material, so that the upper metal sheet 1, the lower metal sheet 3 and the non-metallic filling base 2 have good corrosion resistance and high temperature resistance.

[0025] Among them, Figure 1 As shown, the thickness of the non-metallic filling base 2 is 3mm-5mm.

[0026] Embodiment 2: The present invention provides a position sensor rotor with high oil resistance performance. The difference from the first embodiment is that the non-metallic filling base 2 is a component made of FR4 epoxy resin material, which is beneficial to further reduce the manufacturing material cost of the non-metallic filling base 2 and is more suitable for low-cost mass production.

[0027] Working principle of the present invention: An upper groove 201 is formed on the upper end surface of the non-metallic filling base 2, and the upper metal sheet 1 is embedded in the upper groove 201. A lower groove 202 is formed on the bottom end surface of the non-metallic filling base 2, and the lower metal sheet 3 is embedded in the lower groove 202. The upper metal sheet 1 and the lower metal sheet 3 are both hot-melt pressed, potted or cast with the non-metallic filling base 2. The non-metallic filling base 2 is used as the rotor body, so that the overall weight of the rotor can be better reduced, and the amount of metal waste generated during manufacturing can be reduced, which is beneficial to reducing the manufacturing production cost. The upper metal sheet 1, the non-metallic filling base 2 and the lower metal sheet 3 cooperate to form a cylindrical structure. If used in an oil environment, it is beneficial to reduce the oil resistance encountered by the rotor during operation without affecting the accuracy and quality of the output angle, so that the position sensor rotor has high oil resistance resistance, thereby reducing the power loss caused to the motor shaft 4 equipped with the position sensor rotor, so that the overall structure is optimized.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A position sensor rotor with high resistance to oil resistance, characterized in that: It comprises an upper metal sheet (1), a non-metal filling base (2) and a lower metal sheet (3); The upper end surface of the non-metallic filling base (2) is provided with an upper groove (201), and the upper metal sheet (1) is embedded in the upper groove (201). The bottom end surface of the non-metallic filling base (2) is provided with a lower groove (202), and the lower metal sheet (3) is embedded in the lower groove (202). The upper metal sheet (1) and the lower metal sheet (3) are both fixed to the non-metallic filling base (2) by hot-melt pressing, potting or casting. The upper metal sheet (1), the non-metallic filling base (2) and the lower metal sheet (3) cooperate to form a cylindrical structure.

2. The position sensor rotor with high oil resistance performance according to claim 1, characterized in that: A first axial hole (101) is formed on the surface of the upper metal sheet (1), a second axial hole (203) is formed on the surface of the non-metallic filling base (2), and a third axial hole (301) is formed on the surface of the lower metal sheet (3); the first axial hole (101), the second axial hole (203) and the third axial hole (301) cooperate to form an axial mounting hole.

3. The position sensor rotor with high oil resistance performance according to claim 2, characterized in that: The diameters of the first axial hole (101), the second axial hole (203) and the third axial hole (301) are all the same.

4. The position sensor rotor with high oil resistance performance according to claim 1, characterized in that: The upper metal sheet (1) and the lower metal sheet (3) have the same structure and are in the shape of an impeller.

5. The position sensor rotor with high oil resistance performance according to claim 4, characterized in that: The thickness of the upper metal sheet (1) and the lower metal sheet (3) are both 0.035 mm-1 mm.

6. The position sensor rotor with high oil resistance performance according to claim 4, characterized in that: The upper metal sheet (1) and the lower metal sheet (3) are both components made of copper, aluminum or stainless steel.

7. The position sensor rotor with high oil resistance performance according to claim 1, characterized in that: The non-metallic filling base (2) is a component made of glass fiber reinforced PPS or PA66 material.

8. The position sensor rotor with high oil resistance performance according to claim 1, characterized in that: The thickness of the non-metallic filling base (2) is 3 mm to 5 mm.

9. The position sensor rotor with high oil resistance performance according to claim 1, characterized in that: The non-metallic filling base (2) is a component made of FR4 epoxy resin material.

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