Motor casing with anti-loosening structure and high-speed motor

Abstract

The utility model discloses a motor casing with an anti-loosening structure and a high-speed motor, comprising a bearing chamber, the end portion of the bearing chamber close to the fan blade side is provided with a limiting step, and the limiting step prevents a bearing from flying out of the bearing chamber during high-speed operation due to the fact that glue is not dry or the bonding force is insufficient. The technical problem that a bearing assembly of a machine shell bearing chamber of a penetrating type structure is integrally disengaged is solved, axial mechanical blocking is formed, the bearing assembly is prevented from being integrally disengaged, and the beneficial effect of safety protection is achieved; the glue hiding structure comprises an annular main glue hiding groove formed in the inner wall of the bearing chamber and an auxiliary glue hiding groove formed in the axial end face of the limiting step, the main glue hiding groove and the auxiliary glue hiding groove can contain the glue injection amount within the tolerance range of + / -0.5 mm, and the auxiliary glue hiding groove is formed in the axial inner side end of the limiting step; the depth and the capacity are deeper than those of the main glue hiding groove, and the glue overflowing rate during production is reduced to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the technical field of high-speed motors, and in particular to a motor housing with an anti-loosening structure and a high-speed motor. Background Technology

[0002] Household small appliances such as hair dryers and vacuum cleaners all require small fans. The high-speed motor of a small fan mainly consists of a stator assembly, a rotor assembly, and a housing. The rotor assembly includes a shaft, bearings, and rotor magnets. The shaft is placed in the bearing chamber of the housing. Generally, adhesive is used to bond the bearing to the inner wall of the bearing chamber to ensure the stability of the motor when it rotates at high speed. Since the bearing chamber of the housing has a through-type structure, there is a risk that the entire bearing assembly will detach when the adhesive fails to hold it in place. Machining tolerances cause unstable clearance between the bearing chamber and the bearing: if the clearance is too large, it will reduce the curing effect of the adhesive and prolong the curing time; if the clearance is too small, it will result in insufficient adhesive application, making the bond between the bearing and the bearing chamber weak. In addition, the traditional adhesive reservoir design is prone to overflow when the amount of adhesive applied is too large, requiring an additional wiping process and affecting production efficiency. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, this utility model provides a motor housing and a high-speed motor with an anti-loosening structure, which solves the technical problems of the fan blade flying off due to the overall displacement of the bearing assembly when the glue fails, the reduced assembly efficiency due to too little or too much glue in the glue-containing structure, and the insufficient reliability of the bearing fixing structure.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: a motor housing with an anti-loosening structure, including a bearing chamber, wherein the end of the bearing chamber near the fan blade has a limiting step; and a glue-concealing structure, wherein the glue-concealing structure includes an annular main glue-concealing groove disposed on the inner wall of the bearing chamber and a secondary glue-concealing groove disposed on the axial end face of the limiting step.

[0005] Preferably, the inner wall of the limiting step protrudes from the inner wall of the bearing chamber to prevent the bearing from disengaging from the bearing chamber.

[0006] Preferably, the depth of the secondary glue-containing groove is greater than the depth of the main glue-containing groove, and the glue-containing structure is an annular groove disposed on the inner wall of the bearing chamber.

[0007] Preferably, the depth of the secondary adhesive storage groove is 0.8-1.2 mm, and the groove width is 2-3 mm.

[0008] Preferably, the inner wall of the bearing housing at the end away from the fan blade is a flared transition slope, which guides the bearing assembly and reduces contact stress.

[0009] Preferably, the system further includes an inner shell and an outer shell, which are arranged along the same central axis and form an air duct between them. The bearing chamber is integrally formed with the inner shell.

[0010] Preferably, the inner shell surrounds and forms an internal cavity, the internal cavity having a stepped structure, the internal cavity including a stator assembly mounting cavity.

[0011] Preferably, a stationary blade for guiding airflow is provided between the inner shell and the outer shell.

[0012] A high-speed motor includes a motor housing with an anti-loosening structure as described above, a stator assembly, and a rotor assembly. The rotor assembly includes a rotor magnet, a shaft, and a bearing. The bearing is disposed in the bearing chamber, and the space between the bearing and the inner wall of the bearing chamber is filled with adhesive. The bearing is disposed at one end of the rotor magnet, and the bearing chamber is disposed at one end of the stator assembly mounting cavity.

[0013] A high-speed motor includes a motor housing with an anti-loosening structure as described above, a stator assembly, and a rotor assembly. The rotor assembly includes a rotor magnet, a shaft, and bearings. The bearings are disposed in the bearing chambers, and the space between the bearings and the inner wall of the bearing chambers is filled with adhesive. There are two bearings, which are respectively disposed at both ends of the rotor magnets. The bearing chambers are disposed at both ends of the stator assembly mounting cavity.

[0014] Compared with the prior art, the beneficial effects obtained by this utility model are:

[0015] This utility model discloses a motor housing and a high-speed motor with an anti-loosening structure, including a bearing chamber. The bearing chamber has a limiting step at the end near the fan blade. The limiting step prevents the bearing from flying out of the bearing chamber during high-speed operation due to insufficient adhesive or insufficient bonding strength. This solves the technical problem of the risk of the bearing assembly falling out as a whole in a through-type housing bearing chamber, forming an axial mechanical barrier to prevent the bearing assembly from falling out as a whole, thus providing a beneficial safety protection effect. The adhesive-concealing structure includes an annular main adhesive-concealing groove on the inner wall of the bearing chamber and a secondary adhesive-concealing groove on the axial end face of the limiting step. The main and secondary adhesive-concealing grooves can accommodate an adhesive injection volume within a tolerance range of ±0.5mm. Moreover, the secondary adhesive-concealing groove is located on the inner end of the limiting step in the axial direction and has a deeper depth and capacity than the main adhesive-concealing groove, which minimizes the adhesive overflow rate during production. It also has the beneficial effects of assembly optimization: the transition slope guides the bearing assembly, reducing contact stress by more than 30%; and production efficiency improvement: the adhesive overflow rate is reduced to below 5%, reducing the time spent on wiping. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the motor housing of this utility model.

[0018] Figure 2 This is a schematic diagram of the AA cross-section of the motor housing of this utility model.

[0019] Reference numerals: 1-Bearing chamber; 11-Limiting step; 12-Main rubber groove; 13-Secondary rubber groove; 14-Transition slope; 2-Inner shell; 3-Outer shell; 4-Stationary blade. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 2A high-speed motor includes a motor housing, a stator assembly, a rotor assembly, and fan blades. The rotor assembly includes a rotor magnet, a shaft, and bearings. The motor housing includes a bearing chamber 1, an inner shell 2, an outer shell 3, and stationary blades 4. The inner shell 2 and the outer shell 3 are coaxially arranged, forming an air duct between them. The stationary blades 4 are disposed within the air duct. The bearing chamber 1 is integrally formed with the inner shell 2, which surrounds and forms an internal cavity. The internal cavity includes a stator assembly mounting cavity and has a stepped structure to restrict the movement of the stator assembly. The bearing is disposed in the bearing chamber 1, and the space between the bearing and the inner wall of the bearing chamber 1 is filled with adhesive. The bearing is located at one end of the rotor magnet, and the bearing chamber 1 is located at one end of the stator assembly mounting cavity. The motor housing includes the bearing chamber 1, and the end of the bearing chamber 1 near the fan blades has a limiting step 11, the inner wall of which protrudes from the inner wall of the bearing chamber. To prevent the bearing from detaching from the bearing housing, the limiting step 11 has a height of 1 / 5 to 1 / 3 of the bearing width. The inner wall of the bearing housing 1 at the end away from the fan blade has a flared transition slope 14 with an angle of 30-45°. The transition slope 14 guides the bearing assembly and reduces contact stress. A composite adhesive-containing structure is provided on the inner wall of the bearing housing 1. The composite adhesive-containing structure includes an annular main adhesive-containing groove 12 on the inner wall of the bearing housing 1 and a groove on... The auxiliary rubber groove 13 on the axial end face of the limiting step, the middle of the auxiliary rubber groove 13 and the fan blade is the limiting step 11, that is, the auxiliary rubber groove 13 and the fan blade are respectively located at both ends of the limiting step 11. The auxiliary rubber groove 13 has a depth of 0.8mm and a width of 2mm. The main rubber groove 12 is a plurality of independent annular grooves evenly distributed on the inner wall of the bearing chamber 1. The volume ratio of the main rubber groove 12 to the volume of the auxiliary rubber groove 13 is 3:1.

[0022] In another embodiment, there are two bearings, which are respectively disposed at both ends of the rotor magnet, and the bearing housings are disposed at both ends of the stator assembly mounting cavity.

[0023] In another embodiment, the depth of the secondary adhesive groove is 1.2 mm and the width is 3 mm.

[0024] In another embodiment, the main adhesive groove is a spiral-shaped groove provided on the inner wall of the bearing chamber.

[0025] The above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments, and many similar modifications are possible. All variations that can be directly derived or conceived by those skilled in the art from the content disclosed in this utility model should be considered within the scope of protection of this utility model.

Claims

1. An electric machine housing having an anti-loosening structure, characterized by comprising: The bearing chamber (1) has a limiting step (11) at the end near the fan blade side; the grease hiding structure includes an annular main grease hiding groove (12) arranged on the inner wall of the bearing chamber (1) and a secondary grease hiding groove (13) arranged on the axial end surface of the limiting step (11).

2. The electric machine housing with an anti-loosening structure according to claim 1, characterized in that, The inner wall of the limiting step (11) protrudes from the inner wall of the bearing chamber (1) to block the bearing from being separated from the bearing chamber (1).

3. The electric machine housing with an anti-loosening structure according to claim 1, characterized in that, The depth of the secondary grease hiding groove (13) is greater than the depth of the main grease hiding groove (12).

4. The electric machine housing with an anti-loosening structure according to claim 1, characterized in that, The depth of the secondary grease hiding groove (13) is 0.8-1.2mm, and the groove width is 2-3mm.

5. The electric machine housing with an anti-loosening structure according to claim 1, wherein The inner wall of the end of the bearing chamber (1) away from the fan blade side is a flared transition slope, which guides the bearing assembly and reduces the contact stress.

6. The electric machine housing with an anti-loosening structure according to claim 1, characterized in that, The inner shell (2) and the outer shell (3) are arranged on the same center axis, and a wind channel is formed between the inner shell (2) and the outer shell (3), and the bearing chamber (1) is integrally formed with the inner shell (2).

7. The electric machine housing with an anti-loosening structure according to claim 6, characterized in that, The inner shell (2) surrounds an internal cavity having a stepped structure, and the internal cavity includes a stator assembly mounting cavity.

8. The electric machine housing with an anti-loosening structure according to claim 6, characterized in that, The inner shell (2) and the outer shell (3) are provided with a static blade (4) for guiding air.

9. A high speed electric machine characterized by, The motor housing with anti-loose structure according to any one of claims 1-8, a stator assembly, a rotor assembly, the rotor assembly includes rotor magnetic steel, a rotating shaft and a bearing, the bearing is arranged in the bearing chamber (1), the bearing and the inner wall of the bearing chamber (1) are filled with glue, the bearing is arranged at one end of the rotor magnetic steel, and the bearing chamber (1) is arranged at one end of the stator assembly mounting cavity.

10. A high speed electric machine characterized by, The motor housing with anti-loose structure according to any one of claims 1-8, a stator assembly, a rotor assembly, the rotor assembly includes rotor magnetic steel, a rotating shaft and a bearing, the bearing is arranged in the bearing chamber (1), the bearing and the inner wall of the bearing chamber (1) are filled with glue, the number of bearings is two, which are arranged at both ends of the rotor magnetic steel, and the bearing chamber (1) is arranged at both ends of the stator assembly mounting cavity.

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