Mechanism for preventing bearing from being damaged during high-speed rotation

Abstract

The utility model discloses a mechanism for preventing a bearing from being damaged during high-speed rotation, which comprises a motor shaft lever, the bearing is sleeved outside the motor shaft lever, and a lubricating grease groove is arranged outside the shaft lever wall of the motor shaft lever and is opposite to the bearing. The problem that when an existing bearing rotates at an overspeed, a rotor part is prone to deformation due to heating and is stuck and damaged is solved.

Description

Technical Field

[0001] The utility model relates to the field of motor structures, in particular to a mechanism for preventing a bearing from being damaged during high-speed rotation. Background Art

[0002] Special motor rotors are used in specific applications. The motion state gradually decelerates from high-speed motion, and gradually accelerates to the maximum speed after reaching a specific state. The bearing speed changes with the motion speed. In recent years, the requirements for motor speed have gradually increased, and it is widely used in motor equipment.

[0003] When the motor speed increases, overspeed may occur, that is, the motor shaft exceeds the rated speed of the bearing. At this time, the friction condition between the bearing and the motor shaft changes from the original rolling friction to sliding friction. Sliding friction will generate a lot of heat, and the rotor parts will deform and get stuck due to heat, causing motor failure and partial bearing damage. In order to solve the above problems, it is necessary to improve the existing equipment. Utility Model Content

[0004] The utility model aims to provide a mechanism to prevent the bearing from being damaged during high-speed rotation, so as to solve the problem that the rotor parts of the existing bearings are easily deformed due to heat and become stuck and damaged during overspeed rotation.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A mechanism for preventing a bearing from being damaged during high-speed rotation comprises a motor shaft, a bearing is connected to the motor shaft outer shell, and a lubricating grease groove is provided on the shaft wall of the motor shaft facing the bearing.

[0007] Fill the grease into the grease groove of the motor shaft, install the bearing in place and cover the grease groove. The bearing does not heat up when rotating at low speed, and the grease does not melt inside the grease groove. When the rotor components are affected by external conditions and the speed increases to more than 100,000 rpm (exceeding the rated speed of the bearing), the friction between the bearing and the motor shaft changes from the original rolling friction to sliding friction, which will generate a lot of heat. At this time, the grease in the grease groove melts. After the grease melts, it evaporates at high temperature to lower the temperature, allowing the bearing to dissipate heat, reducing deformation, and effectively reducing the probability of jamming and damage.

[0008] As a further preferred embodiment of the present invention, the motor shaft is connected to the inner ring of the bearing.

[0009] The motor shafts produced are processed with grease grooves in batches, and the grease is added or applied to the grease grooves. The grease is sealed by adding bearings to prevent it from leaking.

[0010] As a further preferred embodiment of the present invention, the cross-section of the lubricating grease groove is semicircular.

[0011] Compared with the prior art, the utility model can achieve at least one of the following beneficial effects:

[0012] 1. It overcomes the influence of the motor rotor's stability performance under overspeed operation. A lubricating grease groove is opened on the motor shaft to form a high-quality lubricating layer. The evaporation of the lubricating grease can control the temperature rise of the rotor when it rotates at high speed, reduce bearing damage, expand the application range of the motor, and save costs.

[0013] 2. After solving the problem that the motor is prone to damage and jamming when it rotates at high speed for a short period of no more than 1 minute, it also takes into account the characteristics of low cost, simple structure, and good implementation effect.

[0014] 3. Used to protect the rotor components from overspeed operation, so that they are not prone to excessive heating and deformation and jamming during ultra-high-speed operation.

[0015] 4. Improve the quality of the company's micro motor products, increase output and pass rate with greater efficiency, and this mechanism can be used for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the shaft rod of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific embodiment 1:

[0025] Figure 1 , Figure 2 A mechanism for preventing bearings from being damaged during high-speed rotation is shown, comprising a motor shaft 1, a bearing 2 is connected to the motor shaft 1, and a lubricating grease groove 3 is provided on the shaft wall of the motor shaft 1 facing the bearing 2.

[0026] Fill the grease into the grease groove of the motor shaft, install the bearing in place and cover the grease groove. The bearing does not heat up when rotating at low speed, and the grease does not melt inside the grease groove. When the rotor components are affected by external conditions and the speed increases to more than 100,000 rpm (exceeding the rated speed of the bearing), the friction between the bearing and the motor shaft changes from the original rolling friction to sliding friction, which will generate a lot of heat. At this time, the grease in the grease groove melts. After the grease melts, it evaporates at high temperature to lower the temperature, allowing the bearing to dissipate heat, reducing deformation, and effectively reducing the probability of jamming and damage. Specific embodiment 2:

[0028] This embodiment further illustrates the motor shaft 1 and the bearing 2 on the basis of the specific embodiment 1, wherein the motor shaft 1 is connected to the inner ring of the bearing 2 .

[0029] The motor shafts produced are processed with grease grooves in batches, and the grease is added or applied to the grease grooves. The grease is sealed by adding bearings to prevent it from leaking. Specific embodiment 3:

[0031] This embodiment further illustrates the lubricating grease groove 3 on the basis of the specific embodiment 1, and the cross section of the lubricating grease groove 3 is semicircular.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanism for preventing a bearing from being damaged when rotating at high speed, characterized in that: The motor shaft (1) comprises a motor shaft (1), wherein a bearing (2) is connected to the outer shell of the motor shaft (1), and a lubricating grease groove (3) is provided on the outer side of the shaft wall of the motor shaft (1) facing the bearing (2).

2. The mechanism for preventing bearings from being damaged during high-speed rotation according to claim 1, characterized in that: The motor shaft (1) is connected to the inner ring of the bearing (2).

3. The mechanism for preventing bearing damage during high-speed rotation according to claim 1, characterized in that: The cross section of the lubricating grease groove (3) is semicircular.

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