Frameless torque motor pole positioning structure

Abstract

This utility model discloses a frameless torque motor magnetic pole positioning structure, relating to the field of frameless torque motor technology. The frameless torque motor magnetic pole positioning structure includes a rotor and a stator fitted inside the rotor. The rotor's outer shell is formed by a steel ring and stacked layers at both ends of the steel ring. The inner wall of the steel ring of the rotor is evenly spaced with several sets of vertical protrusions. The inner wall of the stacked layers of the rotor is evenly spaced with limiting protrusions that span across both ends of a set of vertical protrusions. A slot is provided on the side of the limiting protrusion closest to the vertical protrusion. A magnet is engaged with the limiting protrusion through the slot. The magnet's vertical direction is restricted by the limiting protrusion, and its horizontal direction is also restricted by the vertical protrusion. A rectangular placement area formed by the vertical protrusion and the limiting protrusion is pre-filled with adhesive. When the magnet enters the placement area, it is restricted by the limiting protrusion and also adhered by the adhesive. The rough surface of the steel ring enhances the bonding effect of the adhesive.

Description

Technical Field

[0001] This utility model relates to the field of frameless torque motor technology, and in particular to a magnetic pole positioning structure for a frameless torque motor. Background Technology

[0002] Frameless torque motors remove the housing, end covers, and bearings of traditional motors, retaining only the core components, namely the rotor assembly and stator assembly. The stator assembly contains coils, and the rotor assembly contains magnets.

[0003] Magnets installed inside the rotor assembly are usually fixed with adhesive. To ensure the motor's operating requirements, the magnets need to be precisely positioned. If the magnetic poles inside the rotor are not accurately positioned, the frameless torque motor loses its fundamental value as a high-performance actuator, leading to errors in the motor's rotation. Furthermore, during long-term use, the adhesive-fixed magnets may experience slight shifts due to high temperatures or other environmental factors. This shift can cause the magnetic pole positions to deviate, thus affecting the normal operation of the motor. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a magnetic pole positioning structure for a frameless torque motor, thereby solving the problem of unstable installation position of the magnets in the frameless motor during installation and use.

[0005] The technical solution of this utility model is as follows: a frameless torque motor magnetic pole positioning structure, including a rotor and a stator sleeved inside the rotor. The outer shell of the rotor is formed by a steel ring and stacked layers at both ends of the steel ring. The inner wall of the steel ring of the rotor is evenly spaced with several sets of vertical protrusions. Each set of vertical protrusions is composed of two opposing trapezoidal strips. The trapezoidal strips forming the same set of vertical protrusions are parallel to each other on the opposite side. The inner wall of the stacked layers of the rotor is evenly spaced with limiting protrusions that span across both ends of a set of vertical protrusions. A slot is provided on the side of the limiting protrusions close to the vertical protrusions. A magnet is engaged with the limiting protrusions through the slot. The magnet is restricted vertically by the limiting protrusions and horizontally by the vertical protrusions.

[0006] Furthermore, the stacked layer is composed of multiple thin metal rings axially stacked and bonded with epoxy resin. Each thin metal ring has a protrusion on its inner side, and the protrusions of each thin metal ring are stacked to form a limiting protrusion. The interlayer insulation blocks the transmission of magnetic force, so that the stacked layer will not affect the eddy current path, reduce eddy current loss, and avoid affecting the overall performance of the motor structure.

[0007] Furthermore, the vertical protrusions are integrally formed with the steel ring, and the surface of the steel ring between the vertical protrusions is provided with a rough surface, which can optimize the adhesion effect of the magnet.

[0008] Furthermore, the bottom edge of the limiting protrusion is provided with an inclined chamfer, and a small gap is left between the bottom of the limiting protrusion and the vertical protrusion to facilitate the placement of the magnet into the limiting protrusion.

[0009] Furthermore, the end of the card slot is aligned with the chamfer of the limiting protrusion.

[0010] Furthermore, the thickness of the magnet is less than the thickness of the limiting protrusion and the vertical protrusion, so as to prevent the stator from directly contacting the magnet.

[0011] Furthermore, the stator diameter is smaller than the spacing between the opposing vertical convex ridges.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model forms a rectangular placement area by using vertical protrusions and limiting protrusions. Magnets can be placed inside the rectangular area. The magnets are restricted horizontally by the vertical protrusions and vertically by the limiting protrusions. During the placement of the magnets, the inclined chamfer of the limiting protrusions can guide the magnets in, making it convenient for operators to install.

[0014] 2. In this invention, a rectangular placement area formed by the vertical protrusion and the limiting protrusion is pre-filled with adhesive. When the magnet enters the placement area, it is restricted by the limiting protrusion and also adhered by the adhesive. The rough surface of the steel ring can enhance the bonding effect of the adhesive. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rotor structure of this utility model;

[0017] Figure 3 This is an enlarged schematic diagram of the rotor structure of this utility model;

[0018] Figure 4 This is an exploded view of the rotor structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the card slot structure of this utility model.

[0020] Reference numerals: 1. Rotor; 2. Stator; 3. Vertical protrusion; 4. Limiting protrusion; 5. Slot; 6. Magnet; 101. Steel ring; 102. Stacked layer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figure 1-5 As shown, a frameless torque motor magnetic pole positioning structure includes a rotor 1 and a stator 2 sleeved inside the rotor 1. The outer shell of the rotor 1 is formed by a steel ring 101 and stacked layers 102 at both ends of the steel ring 101. The stacked layers 102 are made of multiple thin metal rings stacked axially and bonded with epoxy resin. Each thin metal ring has a protrusion on its inner side. The protrusions of each thin metal ring are stacked to form a limiting protrusion 4. The interlayer insulation blocks the transmission of magnetic force, so that the stacked layers 102 will not affect the eddy current path, reduce eddy current loss, and avoid affecting the overall structure and performance of the motor.

[0023] The inner wall of the steel ring 101 of the rotor 1 is evenly spaced with several sets of vertical protrusions 3. The diameter of the stator 2 is smaller than the spacing of the opposing vertical protrusions 3. Each set of vertical protrusions 3 is composed of two opposing trapezoidal strips. The trapezoidal strips that make up the same set of vertical protrusions 3 are parallel to each other on the opposite side. The inner wall of the stacked layer 102 of the rotor 1 is evenly spaced with limiting protrusions 4 that are horizontally mounted at both ends of a set of vertical protrusions 3. The limiting protrusions 4 are provided with a slot 5 on the side of the limiting protrusions 4 near the vertical protrusions 3. The end of the slot 5 is aligned with the inclined chamfer of the limiting protrusions 4. The limiting protrusion 4 is engaged with the magnet 6 through the slot 5. The bottom edge of the limiting protrusion 4 is provided with an inclined chamfer. A small gap is left between the bottom of the limiting protrusion 4 and the vertical protrusion 3 to facilitate the placement of the magnet 6 into the limiting protrusion 4. The vertical direction of the magnet 6 is restricted by the limiting protrusion 4 and the horizontal direction is restricted by the vertical protrusion 3. The vertical protrusion 3 and the steel ring 101 are integrally formed. The surface of the steel ring 101 between the vertical protrusions 3 is provided with a rough surface. The rough surface can optimize the adhesion effect of the magnet 6. The thickness of the magnet 6 is less than the thickness of the limiting protrusion 4 and the vertical protrusion 3 to prevent the stator 2 from directly contacting the magnet 6.

[0024] Working principle of this utility model:

[0025] First, the operator applies glue to the rectangular area between the vertical protrusion 3 and the limiting protrusion 4. Then, the operator places the magnet between the two vertical protrusions 3 and pushes the magnet 6 inward along the chamfer of the limiting protrusion 4. During this process, the limiting protrusion 4 is squeezed and deformed, allowing the magnet 6 to move until the magnet 6 passes through the chamfer of the limiting protrusion 4 and enters the slot 5 to complete the installation. It can be used after the glue dries, simplifying the installation steps.

[0026] During use, the horizontal direction of magnet 6 is restricted by vertical protrusion 3, and the vertical direction of magnet 6 is restricted by limiting protrusion 4. Magnet 6 cannot move between vertical protrusion 3 and limiting protrusion 4, thus ensuring the stable installation of magnet 6.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A frameless torque motor magnetic pole positioning structure, comprising a rotor (1) and a stator (2) sleeved inside the rotor (1), wherein the outer shell of the rotor (1) is formed by a steel ring (101) and stacked layers (102) at both ends of the steel ring (101), characterized in that: The inner wall of the steel ring (101) of the rotor (1) is evenly spaced with several sets of vertical protrusions (3). Each set of vertical protrusions (3) is composed of two opposing trapezoidal strips. The trapezoidal strips that make up the same set of vertical protrusions (3) are parallel to each other on the opposite side. The inner wall of the stacked layer (102) of the rotor (1) is evenly spaced with limiting protrusions (4) that are horizontally mounted on both ends of a set of vertical protrusions (3). The limiting protrusions (4) are provided with a slot (5) on the side of the limiting protrusions (4) close to the vertical protrusions (3). The limiting protrusions (4) are connected to magnets (6) through the slots (5). The magnets (6) are restricted in the vertical direction by the limiting protrusions (4) and restricted in the horizontal direction by the vertical protrusions (3).

2. The frameless torque motor magnetic pole positioning structure according to claim 1, characterized in that: The stacked layer (102) is made of multiple thin metal rings stacked axially and bonded with epoxy resin. Each thin metal ring has a protrusion on its inner side, and the protrusions of each thin metal ring are stacked to form a limiting protrusion (4).

3. The frameless torque motor magnetic pole positioning structure according to claim 1, characterized in that: The vertical protrusion (3) is integrally formed with the steel ring (101), and the surface of the steel ring (101) between the vertical protrusions (3) is provided with a rough surface.

4. The frameless torque motor magnetic pole positioning structure according to claim 1, characterized in that: The bottom edge of the limiting protrusion (4) is provided with an inclined chamfer, and a small gap is left between the bottom of the limiting protrusion (4) and the vertical protrusion (3).

5. The frameless torque motor magnetic pole positioning structure according to claim 4, characterized in that: The end of the slot (5) is aligned with the chamfer of the limiting protrusion (4).

6. The frameless torque motor magnetic pole positioning structure according to claim 1, characterized in that: The thickness of the magnet (6) is less than the thickness of the limiting protrusion (4) and the vertical protrusion (3).

7. The frameless torque motor magnetic pole positioning structure according to claim 1, characterized in that: The diameter of the stator (2) is smaller than the spacing between the opposing vertical convex ribs (3).

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