Rotating shaft supporting structure and brushless motor thereof
By designing a shaft support structure and utilizing the combination of sleeves and bearings to distribute the force on the shaft, the stability problem of the shaft support structure under axial and radial forces was solved, achieving stable positioning and force distribution of the shaft, and improving the load capacity and service life of the motor.
Patent Information
- Application Number
- CN202422910952.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The existing motor shaft support structure is prone to damage when subjected to axial and radial forces, resulting in a shortened shaft lifespan and insufficient positioning stability.
Design a shaft support structure that uses front and rear sleeves to cooperate with bearings. The bearing outer ring is positioned by cooperating with the sleeve, and the bearing inner ring is cooperated with the shaft. The force on the shaft is transmitted to the sleeve and the housing through the bearing. Deep groove ball bearings and angular contact bearings are used to bear radial and axial loads, respectively.
It effectively disperses the axial and radial forces of the shaft, improves the load capacity and stability of the shaft and brushless motor, and extends their service life.
Smart Images
Figure CN223816053U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor parts and motor production and manufacturing technical field, especially a kind of rotating shaft support structure and its brushless motor. BACKGROUND
[0002] In the motor work, after electrification, rotating shaft rotates under the action of magnetic field, and the mechanical energy is converted into mechanical energy, which is transferred by rotating shaft and drives load to work. In order to ensure the normal operation of motor and keep its performance for a long time, rotating shaft needs to have high stability and reliability. In this process, special bearing and support structure need to be designed between rotating shaft and motor shell to provide necessary support and lubrication for the rotation of rotating shaft.
[0003] At present, the support structure of the existing motor rotating shaft, along the axial direction of rotating shaft, at both ends of rotating shaft, usually through end cover, insert block, spring etc., rotating shaft is positioned at rotating shaft end position. And in the middle position of rotating shaft, bearing is usually used for support and positioning.
[0004] The existing bearing support positioning is usually designed with shoulder and neck groove on rotating shaft, bearing inner ring is matched with groove, and bearing outer ring is abutted on motor shell. That is, in the positioning of rotating shaft, the groove of rotating shaft is used for support and positioning. The structure of rotating shaft is designed in this way, when motor rotates, the axial force of rotating shaft will be applied at the groove position. For the rotating shaft body, the stress at the groove position is limited, and excessive stress will cause damage to the groove position, so that the support and positioning of rotating shaft are invalid, and the service life of rotating shaft is shortened. SUMMARY
[0005] The utility model solves the technical problems: in order to overcome the insufficient of prior art, the utility model provides a kind of rotating shaft that can be effectively positioned and supported, and in the process of positioning and supporting, the axial force and radial force borne by rotating shaft are dispersed outward, effectively improve the rotating shaft support structure of rotating shaft and brushless motor load and its brushless motor.
[0006] The utility model solves the technical problems by adopting the technical scheme: a rotating shaft support structure, including rotating shaft and shell, the rotating shaft is arranged in the shell, the rotating shaft outer surface is rotationally matched with the front end bearing and the rear end bearing between the shell, the front end bearing separates sleeve into front sleeve and rear sleeve, the front sleeve is located in front of the front end bearing, the rear sleeve is located between the front end bearing and the rear end bearing, and the rear end bearing is located at the end of the rear sleeve in the axial direction;The inner ring of the front end bearing is matched with the outer surface of the rotating shaft, the outer ring front end is pressure bonded with the rear end surface of the front sleeve, and the rear end is pressure bonded with the front end of the rear sleeve;The inner ring of the rear end bearing is matched with the outer surface of the rotating shaft.
[0007] In the above scheme, in view of the original deficiency of positioning the bearing by the rotating shaft, a sleeve is designed, and the positioning of the bearing is realized by the end face pressing of the front and rear sleeve bearing outer ring end face, and under the premise of ensuring the smooth rotation of the rotating shaft and the shell and the sleeve, the radial force of the rotating shaft can be transmitted to the sleeve through the bearing, and the bearing, sleeve and shell can disperse the stress, thereby effectively ensuring the stability and reliability of the rotating shaft support structure.
[0008] Preferably, the front end bearing is a deep groove ball bearing, which has an axial positioning function and can effectively ensure the accurate position of the rotating shaft in the axial direction after cooperating with the sleeve, thereby helping to maintain the overall structural stability and operating accuracy of the motor. Meanwhile, the deep groove ball bearing can also bear a certain radial load, which is convenient for dispersing the radial force of the rotating shaft to the sleeve and the shell.
[0009] Preferably, the rear end bearing is an angular contact bearing, which is a bidirectional adjustable bearing and can produce a certain inclination angle between the inner and outer rings, so that the inner and outer rings can simultaneously bear radial and axial loads. This feature makes the angular contact bearing have a significant advantage in rotating shaft positioning. When arranged at the rear end, it can cope with the complex load conditions generated during the operation of the motor, further dispersing the axial and radial forces of the rotating shaft to the sleeve and the shell, and is more conducive to improving the load of the rotating shaft.
[0010] Further, in the front end positioning of the front sleeve, the rotating shaft front end outer wall is sealingly connected with the shell inner wall through an insert block, the inner and outer surfaces of the insert block are provided with sealing grooves, the sealing grooves are provided with an outer sealing rubber ring in interference fit corresponding to the shell inner wall and an inner sealing ring in interference fit corresponding to the rotating shaft outer wall, and the front end of the front sleeve is pressed on the rear end surface of the insert block.
[0011] Further, in the rear end positioning of the rear sleeve, the rear end of the rotating shaft protrudes and has a shaft shoulder, a circlip is elastically supported between the shaft shoulder and the rear end bearing, the front end of the circlip is pressed on the inner ring of the rear end bearing, and the rear end is pressed on the front end of the shaft shoulder.
[0012] A brushless motor includes a shell, a motor rotor and a motor stator, the motor rotor includes a rotating shaft and a rotor arranged in cooperation with the rotating shaft, and the rotating shaft and the shell adopt the rotating shaft support structure according to any one of the above.
[0013] The utility model discloses a beneficial effect is, the utility model provides a kind of pivot support structure and its brushless motor, the positioning support of pivot is set reasonably effective. The inner side of the cooperation two ends of pivot and shell is designed bearing respectively, sleeve concentric with shell is designed in shell, in the assembly process, in axial positioning, positioning is carried out using bearing outer ring and sleeve, bearing inner ring is cooperated with pivot, when pivot rotates, bearing inner ring rotates with pivot, and axial force and radial force received by pivot are transmitted to bearing outer ring, sleeve, axial force and radial force received by sleeve are dispersed.This pivot support structure realizes effective positioning support between pivot and shell, can effectively disperse pivot stress, can facilitate to improve pivot load, it is favorable to improve the load capacity and stability of pivot and motor using this pivot support structure, while guaranteeing use effect, prolongs service life. BRIEF DESCRIPTION OF DRAWINGS
[0014] The utility model is further described below in connection with the drawings and examples.
[0015] Figure 1 It is the structure schematic view of the utility model pivot support structure.
[0016] Figure 2 It is the front view of the utility model pivot support structure.
[0017] Figure 3 It is Figure 2 sectional view of A-A in it.
[0018] Figure 1-1, outer sealing rubber ring 1-2, inner sealing rubber ring 2, insert block 3, shell 4, front sleeve 5, pivot 6, rear sleeve 7, clamping spring 8, front end bearing 9, rear end bearing. DETAILED DESCRIPTION
[0019] The utility model will be further described in detail in connection with the drawings. These drawings are all simplified schematic views, just with schematic mode to illustrate the basic structure of the utility model, therefore it just shows the structure related to the utility model, direction and reference (for example, upper, lower, left, right, etc.) can be just used to help the description of the features in the drawing. Therefore, the following specific embodiments are not in restrictive sense, and the range of the claimed subject matter is only limited by the appended claims and their equivalents.
[0020] As Figures 1 to 3 shown in a kind of pivot support structure, it is the embodiment of the utility model pivot support structure.
[0021] Specifically, the rotating shaft supporting structure comprises the rotating shaft 5 and the shell 3, the rotating shaft 5 is arranged through the shell 3, and a sleeve is arranged on the inner wall of the shell 3. Two bearings are arranged in rotationally fitted mode between the outer circumferential surface of the rotating shaft 5 and the shell 3, which are distinguished as the front end bearing 8 and the rear end bearing 9 along the axial direction of the rotating shaft 5, and the rear end bearing 9 is located at the end of the sleeve in the axial direction. The front end bearing 8 separates the sleeve into the front sleeve 4 and the rear sleeve 6, the front sleeve 4 is located in front of the front end bearing 8, and the rear sleeve 6 is located between the front end bearing 8 and the rear end bearing 9.
[0022] In the front end positioning of the front sleeve 4, the front end outer wall of the rotating shaft 5 and the inner wall of the shell 3 are connected in sealing mode through the insert block 2. The insert block 2 is locked with the shell 3 through bolts. The inner surface and the outer surface of the insert block 2 are both provided with sealing grooves, the outer sealing rubber ring 1-1 is arranged in interference fit mode on the inner wall of the shell 3 corresponding to the sealing grooves, the inner sealing rubber ring 1-2 is arranged in interference fit mode on the outer wall of the rotating shaft 5 corresponding to the sealing grooves, and the front end of the front sleeve 4 is press-fit on the rear end surface of the insert block 2. Correspondingly, the inner ring of the front end bearing 8 is arranged in fit mode with the outer circumferential surface of the rotating shaft 5, the outer ring of the front end bearing 8 is press-fit with the rear end surface of the front sleeve 4 at the front end, and the rear end is press-fit with the front end of the rear sleeve 6, that is, the outer ring of the front end bearing 8 is axially positioned by the front sleeve 4 and the rear sleeve 6.
[0023] In the embodiment, the bearings at different positions need to be further selected and designed according to their functions in view of the positions of the front and rear end bearings 9. In the selection of the front end bearing 8, a deep groove ball bearing is preferably adopted, the deep groove ball bearing has the function of axial positioning, and the rotating shaft 5 can be effectively kept in accurate position in the axial direction after being matched with the sleeve. The front end bearing 8 is positioned between the front sleeve 4 and the rear sleeve 6, and the design of the deep groove ball bearing at this position is helpful to maintain the overall structural stability and operation accuracy of the motor. At the same time, the deep groove ball bearing can also bear a certain radial load, and it is convenient to disperse the radial force of the rotating shaft 5 outward to the sleeve and the shell 3.
[0024] In the rear end positioning of the rear sleeve 6, the rear end of the rotating shaft 5 protrudes and has a shaft shoulder, the shaft shoulder is elastically supported with the snap spring 7 between the rear end bearing 9, the front end of the snap spring 7 is press-fit with the inner ring of the rear end bearing 9, and the rear end is press-fit with the front end of the shaft shoulder. In the selection of the rear end bearing 9, an angular contact bearing is preferably adopted, the angular contact bearing belongs to a bidirectional adjustable bearing, can produce a certain inclination angle between the inner and outer rings, and thus the inner and outer rings can simultaneously bear radial and axial loads. This feature makes the angular contact bearing, matched with the snap spring 7, be able to cope with the complex load conditions generated in the operation process of the motor when being arranged at the rear end, further disperse the axial force and radial force of the rotating shaft 5 to the sleeve and the shell 3, and be more conducive to improving the load.
[0025] Thus, in view of the original deficiency of positioning the bearing by the rotating shaft 5, the sleeve segmented by the bearing is designed, and the positioning of the bearing is realized by the end face pressing of the front sleeve 4 and the rear sleeve 6. In the assembly process, the bearing outer ring is positioned by the sleeve, the bearing inner ring is matched with the rotating shaft 5, when the rotating shaft 5 rotates, the bearing inner ring rotates with the rotating shaft 5, and the axial force and the radial force of the rotating shaft 5 are transmitted to the bearing outer ring and the sleeve, and the axial force and the radial force of the rotating shaft 5 are dispersed by the sleeve. The rotating shaft support structure realizes the effective positioning and support between the rotating shaft 5 and the shell 3, effectively disperses the force of the rotating shaft 5, facilitates to improve the load of the rotating shaft 5, is beneficial to improve the load capacity and stability of the rotating shaft 5 and the motor using the rotating shaft support structure, prolongs the service life while ensuring the use effect.
[0026] On the basis of the above embodiment, the utility model also provides a brushless motor, the brushless motor includes shell 3, motor rotor and motor stator, motor rotor includes rotating shaft 5 and with rotating shaft 5 cooperation setting rotor. Rotating shaft 5 and shell 3 adopt the rotating shaft support structure described above.
[0027] Through the design of the rotating shaft support structure, the radial force and the axial force of the rotating shaft 5 can be dispersed to the sleeve and the shell 3 through the bearing during the use of the brushless motor, so that the rotating shaft 5 can be effectively positioned and bear greater axial force and radial force in the axial direction, effectively guaranteeing the use stability of the brushless motor and being beneficial to improve the load of the motor. At the same time, the bearing positioning failure caused by excessive force of the rotating shaft can be avoided, and the service life of the brushless motor is effectively prolonged.
[0028] According to the above ideal embodiment of the utility model, the related personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.
Claims
1. A rotating shaft support structure for supporting a rotating shaft (5) including a housing (3) in which said rotating shaft (5) is disposed, characterized by: The sleeve is broken by the front end bearing (8) and is separated into the front sleeve (4) and the rear sleeve (6), the front sleeve (4) is located in front of the front end bearing (8), the rear sleeve (6) is located between the front end bearing (8) and the rear end bearing (9), and the rear end bearing (9) is located at the end of the rear sleeve (6) in the axial direction. The inner ring of the front end bearing (8) is matched with the outer periphery of the rotating shaft (5), the front end of the outer ring is press-connected with the rear end surface of the front sleeve (4), and the rear end is press-connected with the front end of the rear sleeve (6). The inner ring of the rear end bearing (9) is matched with the outer periphery of the rotating shaft (5).
2. A pivot support structure as claimed in claim 1, wherein: The front end bearing (8) is a deep groove ball bearing.
3. A pivot support structure as claimed in claim 1, wherein: The rear end bearing (9) is an angular contact bearing.
4. The pivot support structure of claim 1, wherein: The rotating shaft (5) is sealed and connected between the front end outer wall and the inner wall of the shell (3) through the insert block (2), the inner surface and the outer surface of the insert block (2) are provided with sealing grooves, the sealing grooves are provided with the outer sealing rubber ring (1-1) in interference fit corresponding to the inner wall of the shell (3) and the inner sealing ring (1-2) in interference fit corresponding to the outer wall of the rotating shaft (5), and the front end of the front sleeve (4) is press-connected on the rear end surface of the insert block (2).
5. The pivot support structure of claim 1, wherein: The rotating shaft (5) is provided with a shaft shoulder at the rear end, the shaft shoulder is elastically supported by the snap spring (7) between the rear end bearing (9), the front end of the snap spring (7) is press-connected with the inner ring of the rear end bearing (9), and the rear end is press-connected with the front end of the shaft shoulder.
6. A brushless electric motor characterized by: The rotating shaft support structure, the rotor and the motor stator are provided, the rotating shaft support structure is the rotating shaft support structure in any one of claims 1 to 5.