Riveted Hall rotor

Abstract

The utility model discloses a riveted Hall rotor, which comprises a rotor body, a sinking groove is arranged at the upper end of the rotor body, a magnet is arranged in the sinking groove, a plastic baffle layer is coated along the outer ring of the top of the magnet, and the plastic baffle layer is coated on the outer ring of the top of the magnet through a hot riveting process. The hot riveting process is adopted, the heating speed is high, the riveting time is short, the influence of high temperature on magnet magnetic force fading can be effectively reduced, the product consistency can be guaranteed, meanwhile, the hot riveting process has center positioning and cambered surface guiding in the riveting process, the concentricity is more stable, and the product quality is improved. Therefore, the magnet demagnetization phenomenon caused by high-temperature injection molding can be effectively reduced, meanwhile, spherical positioning of the magnet and the sinking groove is achieved, the center return degree is guaranteed, and the magnet is arranged to be flat positioning so that the NS pole and the consistency of a magnetic field can be conveniently controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sensor parts technical field, specifically belongs to a riveting's hall rotor. BACKGROUND

[0002] The hall sensor is a kind of magnetic field sensor made according to the principle of Hall effect, and the main function of the hall sensor is to identify the rotating position information of magnetic field and convert it into electrical signal output, and ECU reads the voltage signal output by the hall sensor, to judge the position information of the hall rotor.

[0003] The hall sensor accessory contains the hall rotor, and the top of the hall rotor is provided with a magnet to form a magnetic field, and the hall rotor is used to provide the degree of magnetic field rotation in the sensor, and the installation mode of the hall rotor and the magnet in the prior art usually adopts one-shot injection molding or buckle type installation mode, the disadvantage of one-shot injection molding of the magnet is that the temperature of the magnet in the mold cavity is high for a long time, and the demagnetization cannot be estimated, so the product consistency cannot be achieved, and the buckle type installation positioning has the problems of buckle aging and unstable concentricity. SUMMARY

[0004] Therefore, the utility model aims at overcoming the defects in the prior art, and provides a riveted hall rotor, and the following technical solutions are provided in the application:

[0005] A riveted hall rotor, comprising a rotor body, a sink groove is arranged at the upper end of the rotor body, a magnet is arranged in the sink groove, a plastic barrier layer is coated on the top outer circle of the magnet, and the plastic barrier layer is coated on the top outer circle of the magnet by a hot riveting process.

[0006] As an alternative or supplement to the above-mentioned hall rotor using riveting process, the magnet is a cylindrical magnet, and a notch for positioning is formed on the cylindrical magnet, and the shape of the sink groove is the same as that of the magnet.

[0007] As an alternative or supplement to the above-mentioned hall rotor using riveting process, the plastic rotor, sink groove and magnet are coaxially arranged.

[0008] As an alternative or supplement to the above-mentioned hall rotor using riveting process, the material of the rotor body is plastic.

[0009] As an alternative or supplement to the above-mentioned hall rotor using riveting process, the plastic barrier layer is integrally arranged with the top of the rotor body, the plastic barrier layer is distributed around the sink groove, and is coated on the top outer circle of the magnet after being bent by a hot riveting process.

[0010] As described above, due to the adoption of the above technical solutions, the utility model has the following advantages:

[0011] The utility model discloses the structure of the prior art Hall rotor is improved, install the magnet in the sink groove of rotor body top, and the plastic baffle layer of sink groove edge is bent and covered in the top of magnet to form the limit through the hot riveting process, and the Hall rotor production efficiency of such structure is high, and the product appearance consistency is high, relative to the Hall rotor structure of one injection molding in the prior art, the heating speed of the utility model is fast, and the riveting time is shorter, can effectively reduce the influence of high temperature on the magnet magnetic force recession, can guarantee the product consistency, and the hot riveting process has center positioning and arc surface orientation when riveting, and the concentricity is more stable, therefore the utility model can effectively reduce the magnet demagnetization phenomenon caused after high temperature injection molding, and realize the spherical positioning of magnet and the sink groove guaranteeing the concentricity, and the magnet sets up the flat positioning of NS pole and consistency.

[0012] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor.

[0014] Figure 1 It is the structural schematic diagram of the utility model.

[0015] Figure 2 It is the cross-sectional structure schematic diagram of the utility model after hot riveting.

[0016] Figure 3 It is the cross-sectional structure schematic diagram of the utility model before hot riveting.

[0017] Reference signs: 1-rotor body;2-magnet;3-plastic baffle layer. DETAILED DESCRIPTION

[0018] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0019] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0021] Please refer to Figures 1-3 As shown in the drawings, the riveted Hall rotor provided by the embodiment comprises a rotor body 1, a sunken groove is arranged at the upper end of the rotor body 1, a magnet 2 is arranged in the sunken groove, a plastic blocking layer 3 is arranged on the top outer circle of the magnet, and the plastic blocking layer 3 is covered on the top outer circle of the magnet 2 through a hot riveting process.

[0022] The magnet 2 is a cylindrical magnet, a notch for positioning is arranged on the cylindrical magnet, and the shape of the sunken groove is the same as that of the magnet; the plastic rotor, the sunken groove and the magnet 2 are coaxially arranged; the material of the rotor body 1 is plastic; the plastic blocking layer 3 is integrally arranged at the top of the rotor body 1, the plastic blocking layer 3 is distributed around the sunken groove, and the plastic blocking layer 3 is bent and covered on the top outer circle of the magnet 2 through the hot riveting process.

[0023] In the above embodiment, as Figures 1-3 As shown in the drawings, Figure 1 The Hall rotor of the utility model comprises a rotor body 1, the material of the rotor body 1 is plastic, a sunken groove is arranged at the upper end of the rotor body 1, the sunken groove is cylindrical, a notch is arranged on one side, a magnet 2 is installed in the sunken groove, the magnet 2 is a cylindrical magnet, a notch for positioning is arranged on the cylindrical magnet, and a plastic blocking layer 3 is arranged on the periphery of the sunken groove, as Figure 3 As shown in the drawings, the structure schematic diagram before the hot riveting process of the utility model, when the magnet is installed in the sunken groove, the plastic blocking layer 3 is hot-plastic bent and covered on the top of the magnet 2 through the hot riveting process, so that the magnet 2 is limited, Figure 2The utility model discloses a cross section structure schematic diagram after hot riveting process.

[0024] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A riveted Hall rotor characterized by: The application relates to a rotor body provided with a sunken groove at the upper end, and a magnet is arranged in the sunken groove, and a plastic baffle layer is arranged on the top outer circle of the magnet, and the plastic baffle layer is covered on the top outer circle of the magnet through a hot riveting process.

2. A riveted Hall rotor as defined in claim 1, characterized in that: The magnet is a cylindrical magnet, and a notch for positioning is arranged on the cylindrical magnet, and the shape of the sunken groove is the same as that of the magnet.

3. A swaged Hall rotor as claimed in claim 2, wherein: The plastic rotor, the sunken groove and the magnet are coaxially arranged.

4. A swaged Hall rotor as defined in claim 1, wherein: The material of the rotor body is plastic.

5. A riveted Hall rotor as claimed in claim 4, characterised in that: The plastic baffle layer is integrally arranged on the top of the rotor body, the plastic baffle layer is distributed around the sunken groove, and the plastic baffle layer is bent and covered on the top outer circle of the magnet through a hot riveting process.

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