Baffle used for permanent magnet motor rotor and capable of repeatedly dismounting magnetic steel
By using an aluminum alloy circular baffle to connect to the rotor core of the permanent magnet motor, the damaged magnet can be disassembled from one side, solving the problems of difficult magnet replacement and displacement, and achieving convenient replacement and low cost.
Patent Information
- Application Number
- CN202422952202.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-02
AI Technical Summary
When the magnets of a current permanent magnet motor rotor are damaged, two protective plates need to be removed to take out the damaged magnets, which can cause other magnets to shift easily. In addition, the structure is complex and the cost is high.
Design a circular baffle made of aluminum alloy, with a shaft hole and a through hole group. It is connected to the rotor core by a long screw and nut to avoid the slot hole, so as to realize the disassembly of the damaged magnet from one side and avoid displacement caused by the attraction of the magnet by the aluminum alloy.
It facilitates the removal and replacement of damaged magnets, prevents the displacement of other magnets, has a simple structure, low cost, and is easy to process.
Smart Images
Figure CN223625651U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of permanent magnet motor manufacturing technology, specifically relating to a baffle for a removable magnet of a permanent magnet motor rotor. Background Technology
[0002] Our company produces a type of existing permanent magnet motor rotor core, such as... Figures 3-4As shown, it includes a rotor core body 1' composed of multiple rotor laminations stacked together, and the rotor core body 1' is cylindrical. A shaft through hole 2' is provided in the center of the rotor core body 1', and the shaft through hole 2' penetrates the front and rear end faces of the rotor core body 1'. The front end face of the rotor core body 1' has four sets of magnet mounting holes 3', and the magnet mounting holes 3' penetrate the front and rear end faces of the rotor core body 1'. The four sets of magnet mounting holes 3' are equidistantly distributed around the shaft through hole 2'. Each set of magnet mounting holes 3' consists of two first magnet mounting holes 31', two second magnet mounting holes 32', and one third magnet mounting hole 33'. One of the first magnet mounting holes 31' and the second magnet mounting holes 32' are arranged in a straight line. Another first magnet mounting hole 31' and a second magnet mounting hole 32' are arranged in a straight line. The first magnet mounting hole 31' is used to install the magnet 4' that matches the hole. The second magnet mounting hole 32' is used to install the magnet 4' that matches the hole. The third magnet mounting hole 33' is used to install the magnet 4' that matches the hole. A set of through holes 5' is provided between each of the two adjacent sets of magnet mounting hole groups 3'. The through hole group 5' passes through the front and rear end faces of the rotor core body 3'. The through hole group 5' consists of two first through holes 51', two second through holes 52' and two third through holes 53'. The length of the first through hole 51' is greater than the length of the second through hole 52' and the length of the second through hole 52' is greater than the length of the third through hole 53'. However, to prevent axial movement and displacement of the magnets 4' after assembling the rotor core of this type of permanent magnet motor, protective plates are added to both sides of the rotor core (the protective plates are provided with only four long screw through holes and four nut clearance slots, and the long screw through holes and nut clearance slots penetrate both sides of the protective plate). One of the protective plates is fixed to one side of the rotor core by four long screws and four nuts after the four long screw through holes are aligned with the corresponding four first through holes 51'. At this time, the four nut clearance slots on the protective plate are aligned with the remaining four first through holes 51'. The other protective plate... After the four long screw through holes are aligned with the remaining four first through holes 51', the plate is fixed to the other side of the rotor core by four long screws and four nuts. At this time, all eight nuts are located in the corresponding nut clearance slots. If the magnet is damaged in the rotor slot, both guard plates need to be removed to take out the damaged magnet (push the magnet on one side, so that the magnet is pushed out from the other side). In addition, in order to ensure that the guard plate has sufficient strength, the guard plate is made of steel plate. Since the steel plate can attract the magnet, the good magnet located in the other magnet mounting holes is prone to displacement when the guard plate is removed. Utility Model Content
[0003] Design objective: To avoid the shortcomings of the prior art, this paper proposes a baffle for removable magnets of permanent magnet motor rotors that not only facilitates the removal and replacement of damaged magnets, but also prevents displacement of good magnets located in the mounting holes of other magnets when replacing damaged magnets. The baffle is simple in structure and has low production cost.
[0004] Design scheme: To achieve the above design objectives.
[0005] 1. A circular baffle is included, the circular baffle being made of aluminum alloy plate. The front of the circular baffle has a pivot hole that extends through both sides of the circular baffle. The center line of symmetry of the pivot hole coincides with the center line of symmetry of the circular baffle. The front of the circular baffle has four sets of circular through-holes that extend through both sides of the circular baffle. Each set of circular through-holes consists of five circular through-holes. Between two adjacent sets of circular through-holes, there is a long screw through-hole and a nut clearance slot, and both the long screw through-hole and the nut clearance slot are located... All the circular baffles are connected to both sides. After the four long screw through holes of the circular baffle are connected to the four corresponding first through holes on the rotor core body, the four nut clearance slots are connected to the remaining four first through holes. The twenty circular through holes are connected to the eight first magnet mounting holes, the eight second magnet mounting holes, and the four third magnet mounting holes. The design that the diameter of the nut clearance slot is larger than the diameter of the long screw through holes and the diameter of the nut clearance slot is larger than the diameter of the nut is one of the technical features of this utility model. The purpose of this design is as follows: A circular baffle, made of aluminum alloy plate, has a pivot hole on its front side that extends through both sides. The pivot hole's center line coincides with the center line of the circular baffle's center line. The front side of the circular baffle has four sets of circular through-holes that extend through both sides. Each set of circular through-holes consists of five circular through-holes. Between two adjacent sets of circular through-holes, there is a long screw through-hole and a nut clearance slot, both extending through both sides of the circular baffle. After the four long screw through-holes align with the four corresponding first through-holes on the rotor core body, the four nut clearance slots align with the remaining four first through-holes, and so on. Each circular through hole is connected to one of the eight first magnet mounting holes, eight second magnet mounting holes, and four third magnet mounting holes. The diameter of the nut clearance slot is larger than the diameter of the long screw through hole and the diameter of the nut clearance slot is larger than the diameter of the nut. Firstly, the circular through holes allow for easy removal and replacement of damaged magnets in rotor slots by simply removing one of the baffles when a magnet is damaged. Secondly, the circular baffles are made of aluminum alloy, which is not attracted to magnets, preventing displacement of good magnets in other mounting holes during the removal of one baffle and the removal of the damaged magnet. Thirdly, this baffle for removable magnets in a permanent magnet motor rotor also features simple structure, low cost, easy processing, and light weight.
[0006] 2. The four sets of circular through holes are equidistantly arranged around the rotating shaft hole. The twenty circular through holes in the four sets of circular through holes are distributed in three concentric circles, and the center of the three concentric circles coincides with the center of the rotating shaft hole. The centers of eight circular through holes are equidistantly located on the circumference of the first circle, the centers of four circular through holes are equidistantly located on the circumference of the third circle, and the centers of the remaining eight circular through holes are equidistantly located on the circumference of the second circle. The design that the diameter of the third circle is larger than the diameter of the second circle and the diameter of the second circle is larger than the diameter of the first circle is the second technical feature of this utility model. The purpose of this design is that the four sets of circular through holes are equidistantly arranged around the rotating shaft hole. The twenty circular through holes in each set are distributed in three concentric circles, with the centers of these three circles coinciding with the center of the rotating shaft hole. Eight of the circular through holes have their centers equidistantly located on the circumference of the first circle, four have their centers equidistantly located on the circumference of the third circle, and the remaining eight have their centers equidistantly located on the circumference of the second circle. The diameter of the third circle is larger than the diameter of the second circle, and the diameter of the second circle is larger than the diameter of the first circle. The center of the long screw through hole and the center of the four nut clearance slot holes are all located on the circumference of the same circle. The diameter of this circle is smaller than the diameter of the third circle and larger than the diameter of the second circle. The centers of the four nut clearance slot holes are equidistantly distributed on the circumference of this circle, and the centers of the four long screw through holes are equidistantly distributed on the circumference of this circle. Since the four sets of circular through holes, the four long screw through holes and the four nut clearance slot holes are evenly distributed in four places in the circumferential direction, not only is it less prone to errors in production and processing (easy to produce), but the installation direction is also more flexible (easy to use).
[0007] 3. The design that the diameter of the circular through hole is smaller than the length of the first magnet mounting hole, the diameter of the circular through hole is smaller than the length of the second magnet mounting hole, and the diameter of the circular through hole is smaller than the length of the third magnet mounting hole is the third technical feature of this utility model. The purpose of this design is that, with the diameter of the circular through hole being smaller than the length of the first magnet mounting hole, the diameter of the circular through hole being smaller than the length of the second magnet mounting hole, and the diameter of the circular through hole being smaller than the length of the third magnet mounting hole, this baffle for the removable magnets of a permanent magnet motor rotor can prevent axial movement and displacement of the magnets.
[0008] 4. The 12mm thickness of the circular baffle is the fourth technical feature of this utility model. The purpose of this design is that the 12mm thickness of the circular baffle provides sufficient strength while also controlling production costs.
[0009] Technical Solution: A baffle for removable magnets on a permanent magnet motor rotor, comprising a circular baffle made of aluminum alloy plate. The circular baffle has a shaft hole on its front side that extends through both sides. The center line of symmetry of the shaft hole coincides with the center line of symmetry of the circular baffle. The front side of the circular baffle has four sets of circular through-holes that extend through both sides. Each set of circular through-holes consists of five circular through-holes. Between adjacent sets of circular through-holes, there is a long screw through-hole and a... The circular baffle has a nut clearance slot and a long screw through hole, both of which penetrate the front and back sides. After the four long screw through holes of the circular baffle are aligned with the four corresponding first through holes on the rotor core body, the four nut clearance slots are aligned with the remaining four first through holes. The twenty circular through holes are aligned with the eight first magnet mounting holes, the eight second magnet mounting holes, and the four third magnet mounting holes. The diameter of the nut clearance slot is larger than the diameter of the long screw through hole and the diameter of the nut clearance slot is larger than the diameter of the nut.
[0010] Compared with the prior art, the present invention provides a baffle for removable magnets of permanent magnet motor rotors that not only facilitates the removal and replacement of damaged magnets, but also ensures that good magnets located in the mounting holes of other magnets will not be displaced when replacing damaged magnets. At the same time, the structure is simple and the production cost is low. Attached Figure Description
[0011] Figure 1 This is a front view schematic diagram of a baffle for a removable magnet of a permanent magnet motor rotor.
[0012] Figure 2 This is a schematic diagram of the structure of a baffle for repeatedly detachable magnets of a permanent magnet motor rotor when it is assembled with the rotor core of a permanent magnet motor.
[0013] Figure 3 This is a front view schematic diagram of the rotor core of a permanent magnet motor.
[0014] Figure 4 It is a design drawing of the rotor laminations. Detailed Implementation
[0015] Example 1: Refer to Appendix Figures 1-2A baffle for removable magnets in a permanent magnet motor rotor includes a circular baffle 1 made of aluminum alloy. The circular baffle 1 has a shaft hole 2 on its front side, which extends through both sides of the baffle 1. The center line of symmetry of the shaft hole 2 coincides with the center line of symmetry of the circular baffle 1. The circular baffle 1 has four sets of circular through holes 3 on its front side, extending through both sides. Each set of circular through holes 3 consists of five circular through holes 31. Between two adjacent sets of circular through holes 3, there is a long screw through hole 4 and a nut clearance slot 5. Furthermore, the long screw through hole 4 and the nut clearance slot 5 both penetrate the front and back sides of the circular baffle 1. After the four long screw through holes 4 and the four corresponding first through holes 51' on the rotor core body 1' are connected one-to-one, the four nut clearance slots 5 are connected one-to-one with the remaining four first through holes 51' respectively. And the twenty circular through holes 31 are connected one-to-one with the eight first magnet mounting holes 31', the eight second magnet mounting holes 32' and the four third magnet mounting holes 33' respectively. The diameter of the nut clearance slot 5 is larger than the diameter of the long screw through hole 4 and the diameter of the nut clearance slot 5 is larger than the diameter of the nut.
[0016] The four sets of circular through holes 3 are equidistantly arranged around the rotating shaft hole 2. The twenty circular through holes 31 in the four sets of circular through holes 3 are distributed in three concentric circles, and the center of the three concentric circles coincides with the center of the rotating shaft hole 2. The centers of eight circular through holes 31 are equidistantly located on the circumference of the first circle, the centers of four circular through holes 31 are equidistantly located on the circumference of the third circle, and the centers of the remaining eight circular through holes 31 are equidistantly located on the circumference of the second circle. The diameter of the third circle is larger than the diameter of the second circle, and the diameter of the second circle is larger than the diameter of the first circle.
[0017] The diameter of the circular through hole 31 is smaller than the length of the first magnet mounting hole 31', the diameter of the circular through hole 31 is smaller than the length of the second magnet mounting hole 32', and the diameter of the circular through hole 31 is smaller than the length of the third magnet mounting hole 33'.
[0018] The centers of the four long screw through holes 4 and the four nut clearance slots 5 are all located on the circumference of the same circle. The diameter of this circle is smaller than the diameter of the third circle and larger than the diameter of the second circle. The centers of the four nut clearance slots 5 and the four long screw through holes 4 are equidistantly distributed on the circumference of this circle. The thickness of the circular baffle 1 is 12mm.
[0019] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.
Claims
1. A baffle for removable magnets of a permanent magnet motor rotor, comprising a circular baffle (1) made of aluminum alloy plate, wherein the front side of the circular baffle (1) is provided with a shaft hole (2) and the shaft hole (2) penetrates both sides of the circular baffle (1), and the center line of symmetry of the shaft hole (2) coincides with the center line of symmetry of the circular baffle (1), characterized in that: The circular baffle (1) has four sets of circular through holes (3) on its front side, and the circular through holes (3) penetrate both sides of the circular baffle (1). Each set of circular through holes (3) consists of five circular through holes (31). Between two adjacent sets of circular through holes (3), there is a long screw through hole (4) and a nut clearance slot (5). Both the long screw through hole (4) and the nut clearance slot (5) penetrate both sides of the circular baffle (1). The circular baffle (1) is located between the four long screw through holes (4) and the rotor core. After the four corresponding first through holes (51') on the body (1') are connected one by one, the four nut clearance slots (5) are connected one by one with the remaining four first through holes (51'), and the twenty circular through holes (31) are connected one by one with the eight first magnet mounting holes (31'), the eight second magnet mounting holes (32'), and the four third magnet mounting holes (33'). The diameter of the nut clearance slot (5) is larger than the diameter of the long screw through hole (4) and the diameter of the nut clearance slot (5) is larger than the diameter of the nut.
2. The baffle for reusable magnets of a permanent magnet motor rotor according to claim 1, characterized in that: The four sets of circular through holes (3) are equidistantly arranged around the rotating shaft hole (2). The twenty circular through holes (31) in the four sets of circular through holes (3) are distributed in three concentric circles, and the center of the three concentric circles coincides with the center of the rotating shaft hole (2). The centers of eight circular through holes (31) are equidistantly located on the circumference of the first circle, the centers of four circular through holes (31) are equidistantly located on the circumference of the third circle, and the centers of the remaining eight circular through holes (31) are equidistantly located on the circumference of the second circle. The diameter of the third circle is larger than the diameter of the second circle, and the diameter of the second circle is larger than the diameter of the first circle.
3. A baffle for reusable magnets of a permanent magnet motor rotor according to claim 2, characterized in that: The diameter of the circular through hole (31) is smaller than the length of the first magnet mounting hole (31'), the diameter of the circular through hole (31) is smaller than the length of the second magnet mounting hole (32'), and the diameter of the circular through hole (31) is smaller than the length of the third magnet mounting hole (33').
4. A baffle for reusable magnets of a permanent magnet motor rotor according to claim 1 or 2, characterized in that: The center of the four long screw through holes (4) and the center of the four nut clearance slot holes (5) are all located on the circumference of the same circle. The diameter of this circle is smaller than the diameter of the third circle and larger than the diameter of the second circle. The center of the four nut clearance slot holes (5) are equidistantly distributed on the circumference of this circle, and the center of the four long screw through holes (4) are equidistantly distributed on the circumference of this circle.
5. A baffle for reusable magnets of a permanent magnet motor rotor according to claim 1, characterized in that: The thickness of the circular baffle (1) is 12mm.