CN221688395U - Motor rotor surface mounted magnetic steel spacer - Google Patents

Abstract

The utility model discloses a motor rotor surface-mounted magnetic steel spacing sleeve, which includes a rotor core, a spacing sleeve and a magnetic steel; the spacing sleeve is an integrated structure, and the spacing sleeve includes a collar and a separation rib, and the collar is respectively arranged at both ends of the separation rib; the separation rib is arranged around the collar, and the spacing between the separation ribs is uniform; the spacing sleeve is connected to the rotor core, and the separation rib, the collar, and the end face of the rotor core cooperate to form a number of evenly spaced connection slots, and the magnetic steel is connected to the connection slots, so that adjacent magnetic steels are limited to attract each other through the separation ribs. It has the advantages of simple structure, compact coordination, and reasonable design; therefore, it is a product with superior performance in both technical and economic aspects.

Description

Motor rotor surface mounted magnetic steel spacer

[Technical field]

The utility model mainly relates to a magnetic steel spacing sleeve attached to the surface of a motor rotor.

[Background technology]

In the structure of the motor rotor, the magnets are designed to be arranged in intervals, and these magnets are usually attached to the surface of the rotor or in the slots. This design aims to increase the contact area between the magnets and the rotor, thereby improving the transmission efficiency of the magnetic lines of force and enhancing the operating performance of the motor. At the same time, the interval arrangement of the magnets can also reduce the mutual interference between the magnets and improve the operating stability of the motor.

At present, most of the methods for installing the rotor magnets of surface-mounted permanent magnet motors are to mark or mill the magnet slots on the rotor shaft. The advantage of marking is low cost, but the disadvantages are also obvious: low production efficiency, easy to be crooked, and the risk of falling off in the later stage, which makes the motor performance unstable; although milling the magnet slots has good magnet fitting consistency, the cost of milling the slots is high and the processing is slow.

[Utility Model Content]

In order to solve at least one of the above problems, the utility model proposes a new structural solution. The motor rotor surface-mounted magnetic steel spacer sleeve adopts the following technical solution:

A motor rotor surface-mounted magnetic steel spacer sleeve, comprising a rotor core, a spacer sleeve and magnetic steel;

The spacer sleeve is an integrated structure, and includes a collar and a separation rib, wherein the collar is respectively arranged at both ends of the separation rib; the separation rib is arranged at intervals around the collar, and the spacing between the separation ribs is uniform;

The spacing sleeve is connected to the rotor core, and the separation ribs, the sleeve ring, and the end surface of the rotor core cooperate to form a number of evenly spaced connection slots, and the magnets are connected to the connection slots so that adjacent magnets are attracted to each other through the separation ribs.

Preferably, the wall thickness of the magnetic steel spacer sleeve is less than one third of the thickness of the magnetic steel.

Preferably, the rotor core has a sleeve connection portion, a rib extends from the end surface of the sleeve connection portion, and the spacer sleeve is connected to the sleeve connection portion so that the sleeve ring abuts against the rib to limit the position of the spacer sleeve.

Preferably, the rotor core is sleeved with a steel sleeve, and the magnetic steel is connected to the steel sleeve.

Compared with the background technology, the utility model has the following beneficial effects:

The utility model provides a motor rotor surface-attached magnetic steel spacer sleeve, the spacer sleeve is connected to the rotor core, so that the rotor core and the spacer sleeve cooperate to form a connection slot, the magnetic steel is attached to the connection slot to limit the installation position of the magnetic steel, the spacer sleeve assists the magnetic steel to fit, and can also fix the magnetic steel to prevent adjacent magnetic steels from attracting each other. After adopting this structure, each component can be processed independently, reducing process complexity and processing costs, and improving production efficiency; the connection slot position is fixed, the spacing is uniform, the magnetic steel fits the connection slot with good consistency, the performance is stable, and the risk of falling off in the later stage is also greatly reduced. It has the advantages of simple structure, compact fit, and reasonable design; therefore, it is a product with superior performance in both technical and economic aspects.

【Brief Description of the Drawings】

FIG1 is a schematic diagram of the application of a magnetic steel spacer sleeve attached to the surface of a motor rotor in a preferred embodiment of the present invention;

FIG2 is a schematic diagram of a spacer sleeve connected to a rotor core in a preferred embodiment of the present invention;

FIG3 is a schematic diagram of the structure of a magnetic steel spacer sleeve attached to the surface of a motor rotor in a preferred embodiment of the present invention.

[Specific implementation method]

The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.

The preferred embodiment provided by the utility model: as shown in Figures 1 to 3, a motor rotor surface-mounted magnetic steel spacer sleeve, which includes a rotor core 1, a spacer sleeve 2 and a magnetic steel 3; the spacer sleeve 2 is an integrated structure, and the spacer sleeve 2 includes a ring 21 and a separation rib 22, and the ring 21 is respectively arranged at both ends of the separation rib 22; the thickness of the ring 21 and the separation rib 22 are consistent to maintain the flatness of the end face of the spacer sleeve 2, the separation ribs 22 are arranged around the ring 21 at intervals, and the spacing between the separation ribs 22 is uniform.

The spacing sleeve 2 is connected to the rotor core 1, and the separation ribs 22, the collar 21, and the end surface of the rotor core 1 cooperate to form a number of evenly spaced connection slots 23. The size of the magnetic steel 3 corresponds to the size of the connection slots 23, so that the magnetic steel 3 is compactly installed in the connection slots 23; the magnetic steel 3 is connected to the connection slots 23 so that adjacent magnetic steels 3 are attracted to each other through the separation ribs 22. The rotor core 1 is sleeved with a steel sleeve 4, and the magnetic steel 3 is connected to the steel sleeve 4.

The rotor core 1 has a sleeve portion 11, and the end surface of the sleeve portion 11 extends out a rib 12. The spacer sleeve 2 is connected to the sleeve portion 11 so that the collar 21 abuts against the rib 12 to limit the position of the spacer sleeve 2 installed on the rotor core 1. The spacer sleeve 2 and the magnet 3 are attached to the end surface of the sleeve portion 11. The wall thickness of the spacer sleeve 2 of the magnet 3 is less than one-third of the thickness of the magnet 3, so that the magnet 3 is exposed at the end surface of the spacer sleeve 2, which is convenient for winding the coil. The material of the spacer sleeve 2 can be stainless steel or plastic. It is used to assist in attaching the magnet 3, and can also fix the magnet 3 to prevent adjacent magnets 3 from attracting each other. The spacer sleeve 2 defines the position of each magnet 3. Each magnet 3 interacts with the stator rotating magnetic field to generate power, and transmits power through the rotor core 1. In order to prevent the magnet 3 from falling off, the rotor core 1 is sleeved with a steel sleeve 4 to abut the magnet 3 against the connection slot 23.

At present, most of the methods for installing the rotor magnets of surface-mounted permanent magnet motors are to mark or mill the magnet slots on the rotor shaft. The advantage of marking is low cost, but the disadvantages are also obvious: low production efficiency, easy to be crooked, and the risk of falling off in the later stage, which makes the motor performance unstable; although milling the magnet slots has good magnet fitting consistency, the cost of milling the slots is high and the processing is slow.

In order to make the installation of magnetic steel more convenient, we propose a motor rotor surface-mounted magnetic steel spacing sleeve, the spacing sleeve 2 is connected to the rotor core 1, so that the rotor core 1 and the spacing sleeve 2 cooperate to form a connection slot 23, the magnetic steel 3 is attached to the connection slot 23 to limit the installation position of the magnetic steel 3, and the spacing sleeve 2 assists the magnetic steel 3 to fit, and can also fix the magnetic steel 3 to prevent the adjacent magnetic steels 3 from attracting each other. After adopting this structure, each component can be processed independently, reducing the process complexity and processing cost, and improving production efficiency; the connection slot 23 is fixed in position, the spacing is uniform, the magnetic steel 3 is attached to the connection slot 23 with good consistency, stable performance, and the risk of falling off in the later stage is also greatly reduced.

In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims (4)

1. A motor rotor surface-mounted magnetic steel spacer sleeve, characterized in that it includes a rotor core, a spacer sleeve and magnetic steel; The spacer sleeve is an integrated structure, and includes a collar and a separation rib, wherein the collar is respectively arranged at both ends of the separation rib; the separation rib is arranged at intervals around the collar, and the spacing between the separation ribs is uniform; The spacing sleeve is connected to the rotor core, and the separation ribs, the sleeve ring, and the end surface of the rotor core cooperate to form a number of evenly spaced connection slots, and the magnets are connected to the connection slots so that adjacent magnets are attracted to each other through the separation ribs. 2. The motor rotor surface mounted magnetic steel spacer sleeve according to claim 1 is characterized in that the wall thickness of the magnetic steel spacer sleeve is less than one third of the thickness of the magnetic steel. 3. The motor rotor surface-mounted magnetic steel spacer sleeve according to claim 1 is characterized in that: the rotor core has a sleeve connection portion, the end surface of the sleeve connection portion extends out a rib, and the spacer sleeve is connected to the sleeve connection portion so that the sleeve ring abuts against the rib to limit the position of the spacer sleeve. 4. The motor rotor surface-mounted magnetic steel spacer sleeve according to claim 1 is characterized in that the rotor core is sleeved with a steel sleeve, and the magnetic steel is connected to the steel sleeve.