High-power low-noise high-speed motor structure
By adopting a motor housing structure in high-speed motors with the inner and outer shells concentrically arranged, combined with the design of a limit seat and a reference collar, the problem of bearing concentricity difference is solved, achieving low noise and high stability of the motor and extending the service life of the bearings.
Patent Information
- Application Number
- CN202422962381.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-02
AI Technical Summary
In existing high-speed motor structures, the increased axial length of the stator core and rotor shaft leads to poor bearing concentricity, causing increased motor vibration and noise, and the bearings are easily damaged during long-term operation.
The motor housing structure adopts an inner shell and an outer shell that are concentric. The output bearing and the support bearing are aligned concentrically through a limit seat and a reference collar. A preload spring is installed between the bearing and the shaft to improve the concentricity and stability of the bearing.
This improves motor vibration and reduces noise, extends bearing life, and enhances motor structural stability and production efficiency.
Smart Images
Figure CN223472126U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to high -speed motor technical field relates to a high -power low noise high -speed motor structure. BACKGROUND
[0002] The axial length of the stator core and the rotor shaft will be increased in the high -power high -speed motor structure on the market, and in order to improve the stability of structure, the existing structure is supported and fixed effect is realized to the both ends of the rotor shaft by the way that the support bearing is arranged on the both sides of motor magnetic ring, and the bearing needs to be fixed by the cooperation of front and rear shells, when the axial length of front and rear shells increases, the form tolerance of shell and bearing chamber will increase, so the concentricity of front and rear bearings will be poor, and the vibration and noise of motor will be increased when the concentricity of rotor front and rear bearings is poor, and the bearing damage problem is prone to occur in long time operation of motor. CONTENT OF UTILITY MODEL
[0003] In order to solve the above technical problems, the utility model adopts the following technical scheme:
[0004] A high -power low noise high -speed motor structure, including: motor shell, stator core, rotor shaft and bearing end cover,
[0005] The motor shell is composed of an outer shell and an inner shell sleeve arranged in the outer shell, and the inner shell sleeve is arranged concentrically with the outer shell; the stator core is fixedly installed in the inner shell sleeve, and the rotor shaft is arranged in the stator core, the both ends of the rotor shaft extend outward, the output bearing is installed on the output end of the rotor shaft, and the support bearing is installed on the tail end of the rotor shaft;
[0006] The output bearing is arranged in the inner shell sleeve and fixed by the inner shell sleeve; the bearing end cover is installed at the rear end position of the motor shell; the bearing end cover is composed of a limiting seat and a reference sleeve ring arranged coaxially; the limiting seat is formed at the center position of the reference sleeve ring, and a limiting bearing cavity is formed on the limiting seat, and the support bearing is installed in the limiting bearing cavity; the reference sleeve ring is installed on the outer shell and forms concentric arrangement cooperation with the outer shell.
[0007] As a further scheme of the utility model: the reference sleeve ring is in the shape of a "T", which is composed of a plug-in ring edge and a limiting stop edge;
[0008] The plug-in ring edge is inserted into the outer shell from the rear end position of the motor shell and tightly cooperates with the inner wall of the outer shell; the limiting stop edge is latched on the lower end position of the outer shell.
[0009] As a further scheme of the utility model: the lower extension edge of the plug-in ring edge is formed with a plurality of elastic reverse buckles arranged annularly around the center position;
[0010] The shell wall of the outer shell body is formed with a plurality of fixed clamping grooves corresponding to the elastic reverse buckles.
[0011] As a further scheme of the utility model: the outer ring of the output bearing and the support bearing is provided with a bearing silica gel sleeve.
[0012] As a further scheme of the utility model: a set of pre-tightening springs are arranged between the support bearing and the rotor shaft; the pre-tightening springs provide pre-tightening force to the inner rings of the two bearings.
[0013] The output bearing is fixed with the rotor shaft, the inner ring of the support bearing is in clearance fit with the rotor shaft, and the outer ring of the output bearing is in interference fit with the bearing silica gel sleeve.
[0014] The utility model discloses the beneficial effects: the bearing end cover is arranged at the tail end of the motor shell, and the calibration work of the output bearing and the support bearing is realized by taking the outer cylindrical surface of the motor shell as the positioning reference; the concentricity of the front and rear bearings is improved, the technical problems of the motor vibration and the noise increase caused by the poor concentricity of the front and rear bearings are solved, and the bearing damage is prone to occurring during long-time operation of the motor.
[0015] And the pre-tightening spring is arranged between the bearing and the rotor shaft, the pre-tightening effect of the bearing is realized, the structural stability of the rotor shaft and the bearing is improved, and the service life is improved. DRAWINGS
[0016] Fig. 1 It is the structural schematic diagram of the utility model.
[0017] Fig. 2 It is the structural schematic diagram of the motor shell in the utility model.
[0018] Fig. 3 It is the structural schematic diagram of the bearing end cover in the utility model. CONCRETE IMPLEMENTING METHOD
[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application, and apparently, the described embodiments are only part of the embodiments of the application, not all the embodiments of the application, and it should be understood that the application is not limited to the example embodiments disclosed here. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the application.
[0020] In the description of the utility model, it is understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0021] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0022] In the embodiments of the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0023] Please refer to Figs. 1-3 In the embodiments of the utility model, a high-power low-noise high-speed motor structure comprises a motor shell 1, a stator core 9, a rotor shaft 8 and a bearing end cover 4.
[0024] The motor shell 1 is composed of an outer shell 11 and an inner shell sleeve 12 arranged in the outer shell 11, and the inner shell sleeve 12 is arranged concentrically with the outer shell 11.
[0025] The stator core 9 is fixedly installed in the inner shell sleeve 12, and the rotor shaft 8 is arranged in the stator core 9, the two ends of the rotor shaft 8 respectively extend outward, and in order to improve the stability of the two ends of the rotor shaft 8, an output bearing 2 is installed on the output end (one end of the fan blade) of the rotor shaft 8, and a support bearing 6 is installed on the tail end of the rotor shaft 8.
[0026] The front end of the inner shell sleeve 12 is also formed with an inner shell bearing cavity 13 of a semi-enclosed structure, the output bearing 2 is installed in the inner shell bearing cavity 13, and the fixing work of the output bearing 2 is carried out through the inner shell sleeve 12.
[0027] The bearing end cover 4 is installed at the rear end of the motor housing 1 to support the bearing 6. The bearing end cover 4 is composed of a limiting seat 41 and a reference collar 43.
[0028] The limiting seat 41 is formed at the center of the reference collar 43, and a semi-enclosed limiting bearing cavity 47 is formed on the limiting seat 41. The bearing 6 is installed in the limiting bearing cavity 47.
[0029] The reference collar 43 is installed on the outer housing 11 in a concentric arrangement. The motor housing 1 and the bearing end cover 4 are combined to use the motor housing 1 as a positioning reference for the shaft. The output bearing 2 and the support bearing 6 are calibrated.
[0030] Further, the reference collar 43 has a "T" shape structure, which is composed of a plug-in ring edge 45 and a limiting stop edge 46.
[0031] The plug-in ring edge 45 is inserted into the outer housing 11 from the rear end of the motor housing 1 and tightly fits the inner wall of the outer housing 11. This can effectively increase the installation contact area of the reference collar 43 and the motor housing 1, and improve the installation stability and efficiency. The limiting stop edge 46 is buckled at the lower end of the outer housing 11 to limit the installation of the reference collar 43 and the motor housing 1.
[0032] Further, the lower edge of the plug-in ring edge 45 is formed with a plurality of elastic reverse buckles 44 arranged in a circular shape around the center.
[0033] The shell wall of the outer housing 11 is formed with a plurality of fixed clamping grooves 14 corresponding to the elastic reverse buckles 44. When the plug-in ring edge 45 is inserted into the outer housing 11, the elastic reverse buckles 44 are buckled into the fixed clamping grooves 14 to stably install the reference collar 43 and the motor housing 1.
[0034] Further, the outer rings of the output bearing 2 and the support bearing 6 are provided with bearing silica gel sleeves 42 with certain hardness and damping coefficient. This can avoid the vibration generated in the rotor shaft 8 from being directly transmitted to the motor housing structure, thereby effectively reducing the influence of the vibration and noise generated by the high-speed rotation of the rotor on the motor.
[0035] Further, a set of pre-tightening springs 5 is arranged between the support bearing 6 and the rotor shaft 8 to provide pre-tightening force to the inner rings of the two bearings.
[0036] The output bearing 2 is fixed with the rotor shaft 8, the inner ring of the support bearing 6 is in clearance fit with the rotor shaft 8, and the outer ring of the output bearing 2 is in interference fit with the bearing silica gel sleeve 42. This design is conducive to maintaining the pre-tightening force of the pre-tightening spring 5.
[0037] Further, the inner hole end surface of the motor air duct in the motor housing 1 is lower than the end position of the stator core 9, so that better heat dissipation efficiency and wire arranging space are obtained, and the production efficiency and service life of the motor structure are effectively improved.
[0038] It is also noted that the terminology used herein, such as first and second, is merely used for the convenience of the reader and is in no way, implies or suggests, that a relationship is existent or that an order is required between the referenced elements. Moreover, the terms "comprise", "comprises" or "comprising" or any variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0039] The above description of disclosed embodiments will enable one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A high power low noise high speed motor construction, characterized by, The utility model relates to a motor shell, a stator core, a rotor rotating shaft and a bearing end cover. The motor shell is composed of an outer shell and an inner shell sleeve arranged in the outer shell, and the inner shell sleeve is arranged concentrically with the outer shell; the stator core is fixedly installed in the inner shell sleeve, and the rotor rotating shaft is arranged in the stator core, the two ends of the rotor rotating shaft extend outward respectively, an output bearing is installed on the output end of the rotor rotating shaft, and a support bearing is installed at the tail end of the rotor rotating shaft; The output bearing is arranged in the inner shell sleeve, and the fixing work of the output bearing is performed through the inner shell sleeve; the bearing end cover is installed at the rear end position of the motor shell; the bearing end cover is composed of a limiting seat and a reference sleeve ring arranged coaxially; the limiting seat is formed at the center position of the reference sleeve ring, and a limiting bearing cavity is formed on the limiting seat, and the support bearing is installed in the limiting bearing cavity; the reference sleeve ring is installed on the outer shell and is arranged concentrically with the outer shell. The reference sleeve ring is in the shape of a "T", and is composed of a plug-in ring edge and a limiting stop edge; 2. A high power low noise high speed motor construction as claimed in claim 1, wherein, The plug-in ring edge is inserted into the outer shell from the rear end position of the motor shell and is tightly matched with the inner wall of the outer shell; the limiting stop edge is latched on the lower end position of the outer shell. The lower extension edge of the plug-in ring edge is formed with a plurality of elastic reverse buckles arranged annularly around the center position; 3. A high power low noise high speed motor construction as claimed in claim 1, wherein, A plurality of fixing clamping grooves corresponding to the elastic reverse buckles are formed on the shell wall of the outer shell. The outer rings of the output bearing and the support bearing are both provided with bearing silica gel sleeves.
4. A high power low noise high speed motor construction as claimed in claim 1, wherein, A set of pre-tightening springs are arranged between the support bearing and the rotor rotating shaft; the pre-tightening springs provide pre-tightening force for the inner rings of the two bearings; 5. A high power low noise high speed motor construction as claimed in claim 4, wherein, The output bearing is fixed with the rotor rotating shaft, the inner ring of the support bearing is in clearance fit with the rotor rotating shaft, and the outer ring of the output bearing is in interference fit with the bearing silica gel sleeve.