A high-speed motor with a structure to prevent bearing noise change in high and low temperature environments

Abstract

The utility model discloses a high-speed motor with a structure for preventing bearing noise change in high and low temperature environments, comprising a casing, a rolling bearing, and an isolating sleeve made of the same material as the rolling bearing, wherein the isolating sleeve is placed between the rolling bearing and the inner wall of the casing, the outer wall of the isolating sleeve is fitted and fixed to the inner wall of the casing, and the inner wall of the isolating sleeve is fitted and fixed to the outer ring of the rolling bearing, thereby solving the problem in the prior art that, under changes in high and low temperature environments, the connection between the bearing becomes loose as the internal temperature of the motor increases due to the different materials of the bearing and the casing and the corresponding different expansion coefficients, thereby causing abnormal noise to be generated during the operation of the motor, and having the beneficial effect of being suitable for use in high and low temperature environments, in which the bearing can rotate silently without bearing noise change.

Description

Technical Field

[0001] The utility model relates to the field of motor manufacturing, in particular to a high-speed motor with a structure for preventing bearing noise change in high and low temperature environments. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. It is mainly used in situations where wind or suction is required, such as hair dryers, smart toilets, hand dryers, bathroom drying appliances, vacuum cleaners and other household appliances. A bearing is a mechanical component used to support and guide a rotating shaft or a linear motion shaft. In a motor, the motor shaft usually needs to be used in conjunction with a bearing. By installing the shaft on the bearing, the shaft can rotate smoothly with the support of the bearing, thereby ensuring the normal operation of the motor.

[0003] In the prior art, the bearing is usually installed inside the motor, the inner wall of the motor casing is in direct contact with the outer ring of the rolling bearing, and the rolling bearing is fixedly installed on the inner wall of the casing by gluing or interference fit. This bearing installation module is simple and cost-effective, and is used in many micro motors. However, in a high temperature environment, due to the different materials of the zinc alloy used in the casing and the steel used in the bearing, the corresponding expansion coefficients are different. As the temperature inside the motor increases, the diameter change of the inner wall of the zinc alloy casing is larger than that of the outer ring of the rolling bearing, resulting in a slight gap between the inner wall of the zinc alloy casing and the outer ring of the rolling bearing, tearing the glue bonding structure, and causing the connection of the rolling bearing to loosen, thereby causing abnormal noise during the operation of the motor. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies of the prior art, the utility model provides a high-speed motor with a structure for preventing bearing noise changes in high and low temperature environments, thereby solving the problem of the prior art that under changes in high and low temperature environments, due to the different materials of the bearing and the casing and the corresponding different expansion coefficients, as the internal temperature of the motor increases, the connection of the bearing becomes loose, resulting in abnormal noise during the operation of the motor.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a high-speed motor with a structure for preventing bearing noise change in high and low temperature environments, comprising a casing, a rolling bearing, and an isolation sleeve made of the same material as the rolling bearing, the isolation sleeve being placed between the rolling bearing and the inner wall of the casing, the outer wall of the isolation sleeve being fitted and fixed to the inner wall of the casing, and the inner wall of the isolation sleeve being fitted and fixed to the outer ring of the rolling bearing.

[0006] Preferably, a glue storage groove is provided on the inner wall of the isolation sleeve at the contact point with the outer ring of the rolling bearing, and the contact surfaces between the outer wall of the isolation sleeve and the inner wall of the casing and the inner wall of the isolation sleeve and the outer ring of the rolling bearing are all bonded and fixed with glue.

[0007] Preferably, it further comprises a rotating shaft, the inner ring of the rolling bearing is fitted and fixed to the rotating shaft, and the rotating shaft is arranged coaxially with the rolling bearing and the isolation sleeve.

[0008] Preferably, the isolation sleeve and the inner wall of the casing are clearance-fitted.

[0009] Preferably, a boss is provided inwardly at the end of the isolation sleeve.

[0010] Preferably, the sliding fit tolerance of the outer wall of the isolation sleeve and the inner wall of the casing during assembly is the inner wall surface tolerance of the casing +0.01^+0, and the outer wall surface tolerance of the isolation sleeve is -0.0^-0.01; the clearance fit tolerance is the inner wall surface tolerance of the casing +0.03^+0, and the outer wall surface tolerance of the isolation sleeve is -0.0^-0.03.

[0011] Preferably, the sliding fit tolerance of the inner wall of the isolation sleeve and the outer ring of the rolling bearing during assembly is: the inner wall surface tolerance of the isolation sleeve +0.01^+0, and the bearing outer ring surface tolerance of the rolling bearing -0.0^-0.01; the inner wall surface tolerance of the isolation sleeve is +0.03^+0, and the bearing outer ring surface tolerance of the rolling bearing is -0.0^-0.03.

[0012] Preferably, the rolling bearing and the isolation sleeve are made of the same type of steel.

[0013] Preferably, the rolling bearing comprises a first rolling bearing and a second rolling bearing, and the first rolling bearing and the second rolling bearing are arranged on the same side of the motor stator assembly.

[0014] Preferably, a bearing stabilizing sleeve is arranged between the first rolling bearing and the second rolling bearing, and two ends of the bearing stabilizing sleeve are in contact with the inner ring end faces of the first rolling bearing and the second rolling bearing respectively.

[0015] Compared with the prior art, the beneficial effects obtained by the utility model are:

[0016] The utility model discloses a high-speed motor with a structure for preventing bearing noise change in high and low temperature environments, comprising a casing, a rolling bearing, and an isolating sleeve made of the same material as the rolling bearing, wherein the isolating sleeve is placed between the rolling bearing and the inner wall of the casing, the outer wall of the isolating sleeve is fitted and fixed to the inner wall of the casing, the inner wall of the isolating sleeve is fitted and fixed to the outer ring of the rolling bearing, an isolating sleeve made of the same material as the rolling bearing is added between the outer ring of the original rolling bearing and the inner wall of the casing, and the contact surfaces are respectively bonded and fixed with glue, the isolating sleeve is clearance-matched with the casing, and during assembly, It is pressed in by external force to isolate the inner wall of the casing and the rolling bearing. The isolation sleeve and the rolling bearing, which are made of the same material, have the same thermal expansion coefficient, which can effectively reduce the sound change caused by the loosening of the rolling bearing due to thermal expansion and contraction in high and low temperature environments. This solves the problem in the prior art that under high and low temperature environmental changes, due to the different materials of the bearing and the casing and the corresponding different expansion coefficients, the connection of the bearing becomes loose as the internal temperature of the motor increases, thereby causing abnormal noise during the operation of the motor. This has the beneficial effect of being able to rotate the bearing silently without bearing noise change in high and low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A schematic diagram showing the structure of the installation of the rolling bearing, the housing and the isolation sleeve of the utility model;

[0019] Figure 2 A schematic diagram showing the installation of the isolation sleeve and the inner wall of the casing of the utility model;

[0020] Figure 3 A schematic diagram showing the structure of the isolation sleeve of the utility model;

[0021] Figure numerals: 1- housing; 2- rolling bearing; 21- first rolling bearing; 22- second rolling bearing; 3- isolation sleeve; 31- rubber storage groove; 32- boss; 4- rotating shaft; 5- bearing stabilizing sleeve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0025] Please see attached Figure 1 To Attachment Figure 3A high-speed motor with a structure for preventing bearing noise change in high and low temperature environments, comprising a housing 1, a rolling bearing 2, an isolating sleeve 3, and a rotating shaft 4. The isolating sleeve 3 and the rolling bearing 2 are made of the same type of steel. The isolating sleeve 3 is placed between the rolling bearing 2 and the inner wall of the housing 1. The contact surfaces between the outer wall of the isolating sleeve 3 and the inner wall of the housing 1 and between the inner wall of the isolating sleeve 3 and the outer ring of the bearing of the rolling bearing 2 are all fixed by glue. The isolating sleeve 3 and the inner wall of the housing 1 are clearance-matched. During assembly, the outer surface of the isolating sleeve 3 is coated with glue and then pressed into the inner wall cavity of the housing 1 by external force. The isolating sleeve 3 at the contact point with the outer ring of the bearing of the rolling bearing 2 is fixed by glue. A rubber groove 31 is provided on the inner wall; the inner ring of the rolling bearing 2 is fitted and fixed with the rotating shaft 4, and the rotating shaft 4 is arranged coaxially with the rolling bearing 2 and the isolation sleeve 3; a boss 32 is provided inwardly at the end of the isolation sleeve 3, and the boss 32 is used to prevent the rolling bearing 2 from falling off when it is loose; the rolling bearing 2 includes a first rolling bearing 21 and a second rolling bearing 22, and the first rolling bearing 21 and the second rolling bearing 22 are arranged on the same side of the motor stator assembly; a bearing stabilizing sleeve 5 is arranged between the first rolling bearing 21 and the second rolling bearing 22, and the two ends of the bearing stabilizing sleeve 5 are respectively in contact with the inner ring end faces of the first rolling bearing 21 and the second rolling bearing 22.

[0026] Furthermore, the sliding fit tolerance of the outer wall of the isolation sleeve 3 and the inner wall of the casing 1 during assembly is the inner wall surface tolerance of the casing 1 +0.01^+0, and the outer wall surface tolerance of the isolation sleeve 3 is -0.0^-0.01; the clearance fit tolerance is the inner wall surface tolerance of the casing 1 +0.03^+0, and the outer wall surface tolerance of the isolation sleeve 3 is -0.0^-0.03.

[0027] Furthermore, the sliding fit tolerance of the inner wall of the isolation sleeve 3 and the bearing outer ring of the rolling bearing 2 during assembly is: the inner wall surface tolerance of the isolation sleeve 3 is +0.01^+0, and the bearing outer ring surface tolerance of the rolling bearing 2 is -0.0^-0.01; the inner wall surface tolerance of the isolation sleeve 3 is +0.03^+0, and the bearing outer ring surface tolerance of the rolling bearing 2 is -0.0^-0.03.

[0028] The above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many similar modifications. All modifications that can be directly derived or associated with the content disclosed by ordinary technicians in this field should be considered as the scope of protection of the present invention.

Claims

1. A high-speed motor with a structure for preventing bearing noise change in high and low temperature environments, characterized in that: The invention comprises a housing (1), a rolling bearing (2), and an isolating sleeve (3) made of the same material as the rolling bearing (2); the isolating sleeve (3) is placed between the rolling bearing (2) and the inner wall of the housing (1); the outer wall of the isolating sleeve (3) is fitted and fixed to the inner wall of the housing (1); and the inner wall of the isolating sleeve (3) is fitted and fixed to the outer ring of the rolling bearing (2).

2. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: A glue storage groove (31) is provided on the inner wall of the isolation sleeve (3) at a position in contact with the bearing outer ring of the rolling bearing (2), and the contact surfaces between the outer wall of the isolation sleeve (3) and the inner wall of the housing (1) and between the inner wall of the isolation sleeve (3) and the bearing outer ring of the rolling bearing (2) are all bonded and fixed by glue.

3. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: It also comprises a rotating shaft (4), the inner ring of the rolling bearing (2) is fitted and fixed to the rotating shaft (4), and the rotating shaft (4) is coaxially arranged with the rolling bearing (2) and the isolation sleeve (3).

4. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: The isolation sleeve (3) and the inner wall of the casing (1) are clearance-fitted.

5. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: A boss (32) is provided inwardly at the end of the isolation sleeve (3).

6. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: The sliding fit tolerance of the outer wall of the isolation sleeve (3) and the inner wall of the housing (1) during assembly is the inner wall surface tolerance of the housing (1) +0.01^+0, and the outer wall surface tolerance of the isolation sleeve (3) is -0.0^-0.01; the clearance fit tolerance is the inner wall surface tolerance of the housing (1) +0.03^+0, and the outer wall surface tolerance of the isolation sleeve (3) is -0.0^-0.

03.

7. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: The sliding fit tolerance of the inner wall of the isolation sleeve (3) and the outer ring of the rolling bearing (2) during assembly is: the inner wall surface tolerance of the isolation sleeve (3) is +0.01^+0, and the outer ring surface tolerance of the rolling bearing (2) is -0.0^-0.01; the inner wall surface tolerance of the isolation sleeve (3) is +0.03^+0, and the outer ring surface tolerance of the rolling bearing (2) is -0.0^-0.

03.

8. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: The rolling bearing (2) and the isolation sleeve (3) are made of the same type of steel.

9. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 1, characterized in that: The rolling bearing (2) comprises a first rolling bearing (21) and a second rolling bearing (22); the first rolling bearing (21) and the second rolling bearing (22) are arranged on the same side of a motor stator assembly.

10. The high-speed motor with a structure for preventing bearing noise change in high and low temperature environments as claimed in claim 9, characterized in that: A bearing stabilizing sleeve (5) is provided between the first rolling bearing (21) and the second rolling bearing (22), and two ends of the bearing stabilizing sleeve (5) are in contact with inner ring end surfaces of the first rolling bearing (21) and the second rolling bearing (22), respectively.

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