Brushless motor rotor core injection molding assembly

Abstract

The utility model relates to the technical field of brushless motor rotor cores, in particular to a brushless motor rotor core injection molding assembly which comprises a rotor shaft, a first rotor assembly and two second rotor assemblies, the first rotor assembly is installed in the middle of the rotor shaft, and the number of the second rotor assemblies is two. The upper end and the lower end of the rotor shaft are each provided with a second rotor assembly, the bottom of the second rotor assembly at the upper end abuts against the top of the first rotor assembly, and the top of the second rotor assembly at the lower end abuts against the bottom of the first rotor assembly. According to the utility model, the rotor iron core I and the rotor iron core II are arranged, and the plastic parts are injection-molded on the outer walls of the rotor iron core I and the rotor iron core II, so that the cost is saved, and the production and the use are convenient. According to the utility model, the plastic part I and the plastic part II are arranged, the magnetic steel I and the magnetic steel II are wrapped by the plastic part I and the plastic part II, and the two axial end surfaces are blocked by the plastic baffle plates, so that the magnetic steel I and the magnetic steel II are not easy to fall off under high-temperature and high-speed conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of brushless motor rotor cores, and in particular relates to an injection molding component of a brushless motor rotor core. Background Art

[0002] With the development of electric power steering systems, they are gradually being used in large heavy trucks and other vehicles. Compared with small EPS motors, eRCB has greater demands on motor torque, and the corresponding motor rotor is also larger.

[0003] However, compared to small EPS motors, eRCB power-assisted motors used in large, heavy-duty trucks require greater torque output, resulting in larger motor sizes and larger rotor outer diameters. Traditional EPS motors use glue to secure the magnets to the rotor core, but the adhesive strength of glue decreases at high temperatures. Consequently, the magnets may fall off after prolonged use at high temperatures and high speeds. The larger rotor outer diameter of eRCB motors generates greater centrifugal force during operation, making magnets more susceptible to fall-off. Therefore, a brushless motor rotor core injection molding component is urgently needed to address this issue. Utility Model Content

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide a brushless motor rotor core injection molding assembly to solve the problem proposed in the above background technology that the magnetic steel of the motor may fall off after long-term use under high temperature and high speed conditions.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a brushless motor rotor core injection molding assembly, comprising a rotor shaft, a rotor assembly one and a rotor assembly two, wherein the rotor assembly one is installed in the middle of the rotor shaft, two rotor assemblies are provided, and the rotor assemblies two are installed at the upper and lower ends of the rotor shaft, the bottom of the rotor assembly two at the upper end abuts against the top of the rotor assembly one, and the top of the rotor assembly two at the lower end abuts against the bottom of the rotor assembly one.

[0006] Preferably, the rotor assembly includes a rotor core, a circular hole, a slot, a plastic part, a buckle and a magnet, and a circular hole is opened in the middle of the rotor core.

[0007] Preferably, eight card slots 1 are provided on the outer wall of the rotor core 1, and eight plastic parts 1 are provided. The plastic part 1 is opposite to the card slots 1, and a buckle 1 is provided on the side of the plastic part 1 close to the rotor core 1.

[0008] Preferably, the buckle 1 is fixedly connected to the slot 1, eight magnetic steels 1 are provided, the magnetic steel 1 is located between two plastic parts 1, and the magnetic steel 1 is slidably connected to the rotor core 1 and the outer wall of the plastic part 1.

[0009] Preferably, the rotor assembly 2 includes a rotor core 2, a circular hole 2, a slot 2, a plastic part 2, a buckle 2, a plastic baffle and a magnet 2. A circular hole 2 is provided in the middle of the rotor core 2, and eight slots 2 are provided on the outer wall of the rotor core 2.

[0010] Preferably, there are eight plastic parts 2, and the position of the plastic parts 2 is opposite to the slot 2. A buckle 2 is provided on the side of the plastic part 2 close to the rotor core 2, and the buckle 2 is fixedly connected to the slot 2. The bottom of the eight plastic parts 2 is fixedly connected to the plastic baffle.

[0011] Preferably, the top of the plastic baffle is against the bottom of the rotor core 2, eight magnets 2 are provided, and the magnets 2 are located between the two plastic parts 2. The magnets 2 are slidingly connected to the outer wall of the plastic part 2 and the rotor core 2, and the magnets 2 are against the top of the plastic baffle.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. A brushless motor rotor core injection molding assembly is provided with a rotor core 1 and a rotor core 2. Plastic part 1 is injection molded onto the rotor core 1 by injection molding on the structure of the rotor core 1 to form a whole. The shape of the notches on the left and right sides of the plastic part 1 is consistent with the shape of the magnetic steel 1. Plastic part 2 is injection molded onto the slot 2 by injection molding on the structure of the rotor core 2, and a plastic baffle is injection molded at the bottom of the plastic part 2 to connect eight plastic parts 2 to form a whole. The shape of the notches on the left and right sides of the plastic part 2 is consistent with the shape of the magnetic steel 2. By injecting plastic parts on the outer walls of the rotor core 1 and the rotor core 2, the magnetic steel can be fixed while saving costs and facilitating production and use.

[0014] 2. The brushless motor rotor core injection molding assembly is provided with a plastic part 1 and a plastic part 2. The magnet 1 is installed between the two plastic parts 1, and the magnet 2 is installed between the two plastic parts 2 to complete the installation of the rotor assembly 1 and the rotor assembly 2. The circular hole 1 is aligned with the middle of the rotor shaft, and the rotor assembly 1 is pressed into the rotor shaft. The circular hole 2 is aligned with the middle of the rotor shaft, and the two groups of rotor assembly 2 openings are pressed into the rotor shaft relative to each other to fix them. The magnet 1 and the magnet 2 are wrapped by the plastic part 1 and the plastic part 2, and the two axial end surfaces are blocked by plastic baffles, so that the magnet 1 and the magnet 2 are not easy to fall off under high temperature and high speed conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front perspective schematic diagram of the utility model;

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

[0017] Figure 3 This is a schematic diagram of the exploded structure of the rotor assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of the rotor assembly 2 of the present invention;

[0019] Figure 5 This is a partially enlarged schematic diagram of the second rotor assembly of the present invention.

[0020] In the figure: 1. Rotor shaft; 2. Rotor assembly 1; 21. Rotor core 1; 22. Round hole 1; 23. Slot 1; 24. Plastic part 1; 25. Buckle 1; 26. Magnet 1; 3. Rotor assembly 2; 31. Rotor core 2; 32. Round hole 2; 33. Slot 2; 34. Plastic part 2; 35. Buckle 2; 36. Plastic baffle; 37. Magnet 2. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-5 The utility model provides an embodiment: a brushless motor rotor core injection molding component, including a rotor shaft 1, a rotor component 1 2 and a rotor component 2 3. The rotor component 1 2 is installed in the middle of the rotor shaft 1, and two rotor components 2 3 are provided. The rotor components 2 3 are installed at the upper and lower ends of the rotor shaft 1. The bottom of the rotor component 2 3 at the upper end abuts against the top of the rotor component 1 2, and the top of the rotor component 2 3 at the lower end abuts against the bottom of the rotor component 1 2.

[0023] The rotor assembly 2 includes a rotor core 21 , a circular hole 22 , a slot 23 , a plastic part 24 , a buckle 25 and a magnet 26 . A circular hole 22 is provided in the middle of the rotor core 21 .

[0024] Eight slots 23 are provided on the outer wall of the rotor core 21 , and eight plastic parts 24 are provided. The plastic parts 24 are opposite to the slots 23 , and a buckle 25 is provided on one side of the plastic part 24 close to the rotor core 21 .

[0025] The buckle 1 25 is fixedly connected to the slot 1 23 . Eight magnets 1 26 are provided. The magnets 1 26 are located between the two plastic parts 1 24 . The magnets 1 26 are slidably connected to the rotor core 1 21 and the outer wall of the plastic part 1 24 .

[0026] The rotor assembly 2 3 includes a rotor core 2 31 , a circular hole 2 32 , a slot 2 33 , a plastic part 2 34 , a buckle 2 35 , a plastic baffle 36 and a magnet 2 37 . A circular hole 2 32 is provided in the middle of the rotor core 2 31 , and eight slots 2 33 are provided on the outer wall of the rotor core 2 31 .

[0027] There are eight plastic parts 2 34 , which are opposite to the slot 2 33 . A buckle 2 35 is provided on one side of the plastic part 2 34 close to the rotor core 2 31 . The buckle 2 35 is fixedly connected to the slot 2 33 . The bottoms of the eight plastic parts 2 34 are fixedly connected to the plastic baffle 36 .

[0028] The top of the plastic baffle 36 is against the bottom of the rotor core 2 31. There are eight magnets 2 37. The magnets 2 37 are located between the two plastic parts 2 34. The magnets 2 37 are slidably connected to the outer wall of the plastic part 2 34 and the rotor core 2 31. The magnets 2 37 are against the top of the plastic baffle 36. The magnets 1 26 and the magnets 2 37 are wrapped by the plastic parts 1 24 and 2 34, and both axial end surfaces are blocked by the plastic baffle 36, so that the magnets 1 26 and the magnets 2 37 are not easy to fall off under high temperature and high speed conditions.

[0029] Working principle:

[0030] During use, the plastic part 1 24 is injection molded onto the rotor core 1 21 by injection molding to form a whole. The notches on the left and right sides of the plastic part 1 24 are consistent with the shape of the magnet 1 26. The plastic part 2 34 is injection molded onto the slot 2 33 by injection molding on the structure of the rotor core 2 31. A plastic baffle 36 is injection molded at the bottom of the plastic part 2 34 to connect the eight plastic parts 2 34 to form a whole. The notches on the left and right sides of the plastic part 2 34 are consistent with the shape of the magnet 2 37. The magnet 1 26 is installed in the two plastic parts. Between the material parts 1 24, install the magnet 2 37 between the two plastic parts 2 34 to complete the installation of the rotor assembly 1 2 and the rotor assembly 2 3, align the circular hole 1 22 with the middle of the rotor shaft 1, press the rotor assembly 1 2 into the rotor shaft 1, align the circular hole 2 32 with the middle of the rotor shaft 1, press the two sets of rotor assemblies 2 3 openings relative to each other into the rotor shaft 1 to fix them, and wrap the magnet 1 26 and the magnet 2 37 with the plastic parts 1 24 and the plastic parts 2 34, and both axial end surfaces are blocked by the plastic baffles 36, so that the magnet 1 26 and the magnet 2 37 are not easy to fall off under high temperature and high speed conditions.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A brushless motor rotor core injection molding assembly, comprising a rotor shaft (1), a rotor assembly 1 (2) and a rotor assembly 2 (3), characterized in that: A rotor assembly (2) is installed in the middle of the rotor shaft (1), and two rotor assemblies (3) are provided. Rotor assemblies (3) are installed at both upper and lower ends of the rotor shaft (1), the bottom of the rotor assembly (3) at the upper end abuts against the top of the rotor assembly (2), and the top of the rotor assembly (3) at the lower end abuts against the bottom of the rotor assembly (2). The rotor assembly (2) includes a rotor core (21), a circular hole (22), a slot (23), a plastic part (24), a buckle (25) and a magnet (26). A circular hole (22) is provided in the middle of the rotor core (21), and eight slots (23) are provided on the outer wall of the rotor core (21). There are eight plastic parts (24), and the plastic part (24) is opposite to the slot (23). The plastic part 1 (24) is provided with a snap-on 1 (25) on one side close to the rotor core 1 (21). The rotor assembly 2 (3) comprises a rotor core 2 (31), a circular hole 2 (32), a snap-on slot 2 (33), a plastic part 2 (34), a snap-on 2 (35), a plastic baffle (36) and a magnetic steel 2 (37). A circular hole 2 (32) is provided in the middle of the rotor core 2 (31). Eight snap-on slots 2 (33) are provided on the outer wall of the rotor core 2 (31). The plastic part 2 (34) is provided with eight snap-on slots 2 (33). The plastic part 2 (34) is positioned opposite to the snap-on slots 2 (33). The plastic part 2 (34) is provided with a snap-on 2 (35) on one side close to the rotor core 2 (31). The snap-on 2 (35) is fixedly connected to the snap-on slots 2 (33). The bottoms of the eight plastic parts 2 (34) are fixedly connected to the plastic baffles (36).

2. The brushless motor rotor core injection molding assembly according to claim 1, characterized in that: The buckle 1 (25) is fixedly connected to the slot 1 (23), and eight magnetic steels 1 (26) are provided. The magnetic steels 1 (26) are located between two plastic parts 1 (24), and the magnetic steels 1 (26) are slidably connected to the outer wall of the rotor core 1 (21) and the plastic part 1 (24).

3. The brushless motor rotor core injection molding assembly according to claim 1, characterized in that: The top of the plastic baffle (36) is against the bottom of the rotor core 2 (31), and eight magnetic steels 2 (37) are provided. The magnetic steels 2 (37) are located between the two plastic parts 2 (34), and the magnetic steels 2 (37) are slidably connected to the outer wall of the plastic part 2 (34) and the rotor core 2 (31), and the magnetic steels 2 (37) are against the top of the plastic baffle (36).

Images