MR magnetic ring structure for hollow shaft brake motor

Abstract

The utility model discloses an MR magnetic ring structure for a hollow shaft brake motor, which relates to the field of motor structures, and comprises an MR magnetic ring structure, the MR magnetic ring structure comprises a ring body and a bracket, the ring body adopts a neodymium iron boron ring body and is formed by injection molding, the bracket adopts a stainless steel step-shaped frame body and is formed by punching, and the bracket comprises an assembling ring part and a supporting ring part. The assembling ring part and the bearing ring part are integrally arranged, a plurality of evenly-distributed reinforcing bosses are arranged on the side wall of the bearing ring part, reinforcing holes are formed in the middles of the reinforcing bosses in a punching mode, and the ring body is arranged on the side wall of the bearing ring part of the bracket. According to the MR magnetic ring, the outer side of the MR magnetic ring in the circumferential direction is not shielded, the intensity of a magnetic signal is guaranteed, the MR magnetic ring is provided with the metal bracket, the MR magnetic ring can be in interference fit with a motor shaft, the structural strength of the MR magnetic ring is improved, the service life of the MR magnetic ring is prolonged, and in addition, the MR magnetic ring can be prevented from falling off and slipping during rotation.

Description

Technical Field

[0001] The utility model relates to the field of motor structures, in particular to an MR magnetic ring structure for a hollow shaft brake motor. Background Art

[0002] Currently, hollow-shaft brake motors primarily rely on position signal sensors to control motor operation. Due to structural limitations of hollow-shaft motors, the sensor must be fabricated into a ring-shaped structure and assembled on the motor shaft. Considering the inherent fragility of the MR magnetic ring material and its prone to damage, a metal carrier is added when assembling the MR magnetic ring to the shaft to create a hard connection between the carrier and the shaft. To address this issue, an MR magnetic ring structure for hollow-shaft brake motors was proposed. Utility Model Content

[0003] In view of the above-mentioned problems existing in the magnetic ring structure of the existing hollow shaft brake motor, the present utility model is proposed.

[0004] Therefore, the purpose of the present invention is to provide an MR magnetic ring structure for a hollow shaft brake motor, which solves the problems raised in the background technology.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A MR magnetic ring structure for a hollow shaft brake motor includes an MR magnetic ring structure, wherein the MR magnetic ring structure includes a ring body and a bracket, wherein the ring body adopts a neodymium iron boron ring body and is set by injection molding, and the bracket adopts a stainless steel stepped frame body and is set by stamping. The bracket includes an assembly ring portion and a supporting ring portion, and the assembly ring portion and the supporting ring portion are arranged as an integral whole. The side wall of the supporting ring portion is provided with a plurality of evenly distributed reinforcing bosses, and the middle part of the reinforcing boss is stamped with a reinforcing hole, and the ring body is arranged on the side wall of the supporting ring portion of the bracket.

[0007] Preferably, the inner side wall of the ring body is provided with a guide slope, and the guide slope of the ring body is inclined toward the direction of the bracket.

[0008] Preferably, the inner diameter of the assembly ring portion is the same as the inner diameter of the supporting ring portion, and the outer diameter of the assembly ring portion is smaller than the outer diameter of the supporting ring portion.

[0009] Preferably, the ring body wraps the plurality of reinforcement bosses, and the ring body extends to the interior of the reinforcement hole.

[0010] Furthermore, the assembly ring portion is fitted with the motor shaft in an interference fit.

[0011] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0012] The utility model provides a bracket on the side wall of the ring body, and a reinforcing boss and a reinforcing hole are provided between the bracket and the ring body. The ring body is injection-molded on the supporting ring portion of the bracket, so that the ring body can be stably supported. At the same time, after the ring body and the bracket are molded, the injection molding material of the ring body will wrap around the reinforcing boss and the injection molding material will enter the interior of the reinforcing hole, thereby increasing the contact area between the ring body and the supporting ring portion of the bracket, ensuring the torsional strength of the ring body and the bracket after injection molding, and at the same time preventing the radial magnetic signal of the ring body from being interfered with. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 For the utility model Figure 1 Cross-sectional view of the middle ring body and bracket;

[0016] Figure 3 For the utility model Figure 2 A magnified view of the structure of part A in the middle;

[0017] Figure 4 For the utility model Figure 1 A perspective view of the middle bracket;

[0018] Figure 5 For the utility model Figure 4 Plan view of the middle bracket.

[0019] Description of reference numerals:

[0020] 1. Ring body; 2. Bracket; 2-1. Supporting ring; 2-2. Reinforcement boss; 2-3. Assembly ring; 2-4. Reinforcement hole. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] The utility model provides Figure 1-2The MR magnetic ring structure shown is for a hollow shaft brake motor, including an MR (MR is the abbreviation of magnetic resonance) magnetic ring structure. The MR magnetic ring structure includes a ring body 1 and a bracket 2. The ring body 1 is injection-molded and arranged on the side wall of the bracket 2. The ring body 1 adopts a neodymium iron boron ring body and is arranged by injection molding. The ring body 1 is provided with 5 pairs of pole magnetic fields along the circumferential wall direction. Neodymium iron boron is a high-performance magnetic material with characteristics such as high magnetic energy product, high coercive force and high remanence.

[0023] like Figure 1-5 As shown, the bracket 2 adopts a stainless steel stepped frame and is set by stamping. The bracket 2 includes an assembly ring portion 2-3 and a supporting ring portion 2-1. The assembly ring portion 2-3 and the supporting ring portion 2-1 are set as an integral whole. The inner diameter of the assembly ring portion 2-3 is the same as the inner diameter of the supporting ring portion 2-1, and the outer diameter of the assembly ring portion 2-3 is smaller than the outer diameter of the supporting ring portion 2-1. The side wall of the supporting ring portion 2-1 is provided with a plurality of evenly distributed reinforcing bosses 2-2, and the middle part of the reinforcing boss 2-2 is stamped with a reinforcing hole 2-4. The ring body 1 is set on the side wall of the supporting ring portion 2-1 of the bracket 2, and the ring body 1 wraps the plurality of reinforcing bosses 2-2, and the ring body 1 extends to the inside of the reinforcing hole 2-4. The assembly ring portion 2-3 is interference-fitted with the motor shaft, so that the bracket 2 can be firmly installed on the motor shaft.

[0024] The ring body 1 is injection molded on the supporting ring portion 2-1 of the bracket 2, so that the ring body 1 can be stably supported. At the same time, after the ring body 1 and the bracket 2 are molded, the injection molding material of the ring body 1 will wrap the reinforcing boss 2-2 and the injection molding material will enter the interior of the reinforcing hole 2-4, increasing the contact area between the ring body 1 and the supporting ring portion 2-1 of the bracket 2, ensuring the torsional strength of the ring body 1 and the bracket 2 after injection molding, and at the same time ensuring that the radial magnetic signal of the ring body 1 is not interfered with.

[0025] like Figure 2 As shown, the inner side wall of the ring body 1 is provided with a guide slope, and the guide slope of the ring body 1 is inclined toward the direction of the bracket 2.

[0026] During injection molding of the present invention, the flowing injection plastic of the ring body 1 is formed on the supporting ring portion 2-1, while wrapping the reinforcing boss 2-2 and having a portion flowing into the reinforcing hole 2-4, thereby ensuring the torsional strength between the ring body 1 and the bracket 2 in the later stage. After injection molding, the ring body 1 is not blocked in the radial direction, so that the radial magnetic signal of the ring body 1 is not interfered with.

[0027] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An MR magnetic ring structure for a hollow shaft brake motor, comprising an MR magnetic ring structure, characterized in that: The MR magnetic ring structure comprises a ring body (1) and a bracket (2); The ring body (1) is made of a neodymium iron boron ring body and is provided by injection molding; The bracket (2) adopts a stainless steel stepped frame body and is formed by stamping. The bracket (2) comprises an assembly ring portion (2-3) and a supporting ring portion (2-1). The assembly ring portion (2-3) and the supporting ring portion (2-1) are integrally provided. The side wall of the supporting ring portion (2-1) is provided with a plurality of evenly distributed reinforcing bosses (2-2), and the middle portion of the reinforcing bosses (2-2) is punched with reinforcing holes (2-4). The ring body (1) is arranged on the side wall of the supporting ring portion (2-1) of the bracket (2).

2. The MR magnetic ring structure for a hollow shaft brake motor according to claim 1, characterized in that: The inner side wall of the ring body (1) is provided with a guide slope, and the guide slope of the ring body (1) is inclined in the direction of the bracket (2).

3. The MR magnetic ring structure for a hollow shaft brake motor according to claim 1, characterized in that: The inner diameter of the assembly ring portion (2-3) is the same as the inner diameter of the supporting ring portion (2-1), and the outer diameter of the assembly ring portion (2-3) is smaller than the outer diameter of the supporting ring portion (2-1).

4. The MR magnetic ring structure for a hollow shaft brake motor according to claim 1, characterized in that: The ring body (1) wraps and arranges the plurality of reinforcing bosses (2-2), and the ring body (1) extends to the interior of the reinforcing hole (2-4).

5. The MR magnetic ring structure for a hollow shaft brake motor according to claim 1, characterized in that: The assembly ring portion (2-3) is fitted with the motor shaft in an interference fit.

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