A rotor assembly facilitating bearing replacement

Abstract

The utility model relates to the technical field of lithium battery coating technology, specifically discloses a rotor assembly convenient to replace bearing, including heat dissipation shell, motor shaft, bearing, bearing end cover, the bearing chamber is set up in the axle center place of heat dissipation shell, the bearing is installed in bearing chamber, heat dissipation shell is rotatably connected with motor shaft through bearing, the outside of bearing chamber is detachably connected with heat dissipation shell through bearing end cover, the inside of bearing chamber is sealedly connected with the inside of heat dissipation shell through rear oil seal. Through this rotor assembly, the bearing end cover can be opened to carry out regular maintenance and maintenance to the bearing in the later maintenance, and if the bearing needs to be replaced, the bearing can also be pulled out from the heat dissipation shell at the front end of the motor to replace. Compared with the structure of other motor rotor assemblies, the whole stator rotor needs to be removed for bearing maintenance, and the rotor assembly greatly saves the motor bearing maintenance time and cost.

Description

Technical Field

[0001] This utility model relates to the field of motor maintenance technology, and in particular to a rotor assembly that facilitates motor maintenance and bearing replacement. Background Technology

[0002] Electric motors are commonly used rotary drive devices, involved in various fields, especially industries related to mechanical equipment, which use products such as servo motors, stepper motors, AC motors, and DC motors. Over the years, motors can also experience malfunctions, such as the rotor failing to drive stably and making abnormal noises during operation. This is generally caused by damaged internal bearings, requiring the entire stator and rotor to be disassembled for bearing maintenance or replacement. This maintenance method consumes a significant amount of factory production time, easily leading to equipment downtime and high repair costs. Utility Model Content

[0003] The purpose of this invention is to provide a rotor assembly that facilitates bearing replacement, thereby solving the problems encountered in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A rotor assembly for easy bearing replacement includes a heat sink housing, a motor shaft, a bearing, and a bearing end cover. The heat sink housing has a bearing chamber at its axial center, and the bearing is installed in the bearing chamber. The heat sink housing is rotatably connected to the motor shaft via the bearing. The outer side of the bearing chamber is detachably connected to the heat sink housing via the bearing end cover, and the inner side of the bearing chamber is sealed to the inside of the heat sink housing via a rear oil seal.

[0005] In the above scheme, the bearing end cover covers the top of the bearing housing and is sealed to the bearing installed inside the bearing housing. A front oil seal, which is sealed to the bearing, is installed inside the bearing end cover, and an O-ring is provided at the bottom of the outer flange of the bearing end cover for sealing with the heat dissipation housing.

[0006] As a preferred embodiment, the outer flange of the bearing end cover is detachably connected to the heat dissipation housing by bolts. A bearing lock nut is installed inside the bearing end cover, and the outside of the bearing lock nut is sealed to the bearing end cover via a front oil seal.

[0007] In the above scheme, the exterior of the heat dissipation shell is provided with heat dissipation fins, which are sheet-like structures and evenly distributed on the outer circumference of the heat dissipation shell. The heat dissipation fins are divided into multiple groups, and each group of heat dissipation fins is an arc-shaped sheet structure, with an included angle between the arc directions of adjacent groups of heat dissipation fins.

[0008] As a preferred embodiment, a locking end cover is provided inside the heat dissipation housing on the side of the motor shaft near the bearing, and the locking end cover is used to fix and connect with the rotor components.

[0009] Compared with existing technologies, the advantages of this invention are: With this rotor assembly, subsequent maintenance allows for regular maintenance and upkeep of the bearings by opening the bearing end cover; if bearing replacement is needed, it can be removed from the heat dissipation housing at the front of the motor for replacement. Compared to other motor rotor assemblies, which require disassembling the entire stator and rotor for bearing maintenance, this rotor assembly significantly reduces motor bearing maintenance time and costs. Attached Figure Description

[0010] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention after assembly; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 2 A stereoscopic view from another perspective; Figure 4 This is an exploded view of the present invention; Figure 5 for Figure 4 A stereoscopic view from another perspective.

[0011] The numbers in the diagram are: 1-heat dissipation housing; 2-motor shaft; 3-rear oil seal; 4-bearing housing; 5-O-ring seal; 6-bearing; 7-bearing lock nut; 8-bearing end cover; 9-bolt; 10-front oil seal; 11-locking end cover. Detailed Implementation

[0012] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0013] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1-5 As shown, a rotor assembly with easily replaceable bearings includes a heat dissipation housing 1, a motor shaft 2, a bearing 6, and a bearing end cover 8. A bearing chamber 4 is formed at the center of the heat dissipation housing 1, and the bearing 6 is installed in the bearing chamber 4. The heat dissipation housing 1 is rotatably connected to the motor shaft 2 via the bearing 6. During installation, the inner ring of the bearing 6 is interference-fitted with the motor shaft 2, and the outer ring of the bearing 6 is interference-fitted with the bearing chamber 4. This allows the heat dissipation housing 1 to be rotatably connected to the motor shaft 2 via the bearing 6, thus realizing the basic function of the rotor assembly.

[0016] To facilitate the replacement of bearing 6, a bearing end cover 8 is detachably connected to the heat sink housing 1 on the outside of bearing chamber 4, and a rear oil seal 3 provides a sealed connection between the bearing chamber 4 and the inside of the heat sink housing 1. The bearing end cover 8, which can be detachably connected to the outside of the heat sink housing 1, allows for easy opening of the bearing end cover 8 to replace and maintain bearing 6, such as replacing worn parts or adding lubricating oil. Compared to existing methods, this significantly reduces maintenance time.

[0017] During installation, the bearing end cover 8 is placed over the top of the bearing housing 4 and sealed to the bearing 6 installed inside the bearing housing 4. Specifically, the bearing end cover 8 has a front oil seal 10 installed inside to seal with the bearing 6, and an O-ring 5 at the bottom of the outer flange of the bearing end cover 8 to seal with the heat dissipation housing 1, preventing external impurities or gas from entering the motor.

[0018] In addition, in specific implementation, the outer flange of the bearing end cover 8 is detachably connected to the heat sink housing 1 by bolts 9. When tightened, the bolts 9, in conjunction with the gasket, are stably screwed into the pre-drilled mounting holes on the outside of the heat sink housing 1. A bearing locking nut 7 is installed inside the bearing end cover 8, and the outside of the bearing locking nut 7 is sealed to the bearing end cover 8 by a front oil seal 10. The bearing locking nut 7 locks and fixes the inner ring of the bearing 6 onto the motor shaft 2, using an O-ring seal 5 and the front oil seal 10 for sealing. The outer ring of the bearing 6 bears the axial tensile force on the bearing end cover 8. The bearing end cover 8 and the bearing housing 4 are secured with high-strength anti-loosening nuts.

[0019] Please see Figure 1 and Figure 4 As a preferred embodiment, the exterior of the heat dissipation housing 1 is provided with heat dissipation fins. The heat dissipation fins are sheet-like structures, evenly distributed on the outer periphery of the heat dissipation housing 1, used to dissipate heat from the motor during operation by increasing the heat dissipation area. Furthermore, the heat dissipation fins are divided into multiple groups, each group of heat dissipation fins is an arc-shaped sheet structure, and the arc direction of adjacent groups of heat dissipation fins has an included angle, so as to facilitate intermittent heat dissipation and thus achieve a higher heat dissipation effect.

[0020] Inside the heat dissipation housing 1, a locking end cover 11 is provided on the side of the motor shaft 2 near the bearing 6. The locking end cover 11 is used to fix and connect with the rotor components. When the rotor components include an iron core and windings, the iron core and windings are locked together by the locking end cover 11 and screws. The iron core of the rotor is also made of silicon steel sheets stacked together to reduce eddy current losses. The design of the windings varies depending on the specific motor type, but their core function is to generate a magnetic field, thereby driving the rotation of the motor.

[0021] With this rotor assembly, the bearing end cover 8 can be opened for regular maintenance and upkeep of the bearing 6. If bearing 6 needs to be replaced, it can be pulled out from the heat dissipation housing 1 at the front of the motor for replacement. Compared to the structure of other motor rotor assemblies, which require the entire stator and rotor to be disassembled for bearing maintenance, this rotor assembly greatly saves motor bearing maintenance time and costs.

[0022] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rotor assembly with easily replaceable bearings, characterized in that: The device includes a heat dissipation housing (1), a motor shaft (2), a bearing (6), and a bearing end cover (8). A bearing chamber (4) is provided at the center of the heat dissipation housing (1). The bearing (6) is installed in the bearing chamber (4). The heat dissipation housing (1) is rotatably connected to the motor shaft (2) through the bearing (6). The outer side of the bearing chamber (4) is detachably connected to the heat dissipation housing (1) through the bearing end cover (8). The inner side of the bearing chamber (4) is sealed to the inside of the heat dissipation housing (1) through a rear oil seal (3).

2. The rotor assembly for easy bearing replacement according to claim 1, characterized in that: The bearing end cap (8) covers the top of the bearing chamber (4) and is sealed to the bearing (6) installed inside the bearing chamber (4).

3. A rotor assembly for easy bearing replacement according to claim 2, characterized in that: The bearing end cover (8) is equipped with a front oil seal (10) that is sealed to the bearing (6), and the bottom of the outer flange of the bearing end cover (8) is provided with an O-ring (5) that is sealed to the heat dissipation shell (1).

4. A rotor assembly for easy bearing replacement according to claim 3, characterized in that: The outer flange of the bearing end cover (8) is detachably connected to the heat dissipation shell (1) by bolts (9).

5. A rotor assembly for easy bearing replacement according to claim 3, characterized in that: The bearing end cover (8) is equipped with a bearing locking nut (7) inside, and the bearing locking nut (7) is sealed to the bearing end cover (8) through a front oil seal (10).

6. A rotor assembly for easy bearing replacement according to claim 1, characterized in that: The heat dissipation shell (1) is provided with heat dissipation fins on its exterior. The heat dissipation fins are in the form of sheet-like structures and are evenly distributed on the outer periphery of the heat dissipation shell (1).

7. A rotor assembly for easy bearing replacement according to claim 6, characterized in that: The heat dissipation fins are divided into multiple groups, and each group of heat dissipation fins is an arc-shaped sheet structure. There is an angle between the arc directions of adjacent groups of heat dissipation fins.

8. A rotor assembly for easy bearing replacement according to claim 1, characterized in that: Inside the heat dissipation housing (1), a locking end cover (11) is provided on the side of the motor shaft (2) near the bearing (6), and the locking end cover (11) is used to fix and connect with the rotor components.

9. A rotor assembly for easy bearing replacement according to claim 1, characterized in that: The inner ring of the bearing (6) is interference-fitted with the motor shaft (2), and the outer ring of the bearing (6) is interference-fitted with the bearing housing (4).

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