High-reliability brushless motor

Abstract

The utility model aims to provide a high-reliability brushless motor, which comprises a stator seat and a rotor assembly, the axis of the stator seat is provided with a rotating hole, two ends of the rotating hole are respectively provided with a clamping step, the outer side wall of the stator seat is provided with a plurality of winding groups which are circumferentially distributed, and the rotor assembly comprises a rotating shaft, a lock screw, a sleeve, a rotating seat and two bearings. The two bearings are arranged in the two clamping steps respectively, the rotating shaft sequentially penetrates through the two bearings, the sleeve is arranged on the rotating shaft in a sleeving mode, the two ends of the sleeve abut against the two bearings respectively, the rotating base is arranged on the rotating shaft so that the rotating base can abut against one bearing, and the lock screw is connected to the end, away from the rotating base, of the rotating shaft in a screwed mode. And the lock screw is propped against the other bearing. Compared with an existing structure which only acts on a single bearing, the bearing structure can effectively improve the anti-pressure capability of the bearing, effectively improves the tensile strength of the motor, and is more reliable in structure.

Description

Technical Field

[0001] This utility model relates to the technical field of brushless motors, and in particular to a highly reliable brushless motor. Background Technology

[0002] Currently, brushless motors are being used more and more widely, especially in the field of fixed-wing model aircraft. Brushless motors have become the preferred power source due to their advantages such as high efficiency, environmental protection and energy saving, wide speed range, long life, low noise and small size.

[0003] Brushless motors primarily consist of a rotor and a stator. The propellers are mounted on one end of the rotor. Therefore, the reliability of the propeller mounting on the rotor is a crucial factor affecting the flight of model aircraft. Instability in the propeller locking structure can lead to problems such as aircraft crashes and propeller ejection. Currently, common propeller locking structures rely on bearings and screws to lock the rotor shaft, preventing it from being pulled out of the motor. However, after a certain period of use, this existing structure causes the bearings in contact with the screws to wear and deform under the prolonged tension of the shaft, resulting in a decrease in the motor's rotational performance. Therefore, to address these issues, this application proposes a highly reliable brushless motor. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly reliable brushless motor that can improve the tensile strength of the bearing.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A highly reliable brushless motor, comprising:

[0007] A stator base, wherein a rotating hole is formed at the center of the stator base, and a locking step is provided at each end of the rotating hole; and several winding groups are arranged in a circular pattern on the outer wall of the stator base; and

[0008] A rotor assembly includes a rotating shaft, a locking screw, a sleeve, a rotating base, and two bearings. The two bearings are respectively disposed within two locking steps. The rotating shaft passes through the two bearings in sequence. The sleeve is sleeved on the rotating shaft, and both ends of the sleeve abut against the two bearings respectively. The rotating base is disposed on the rotating shaft so that it abuts against one of the bearings. The locking screw is screwed onto the end of the rotating shaft away from the rotating base, and the locking screw abuts against the other bearing.

[0009] Optionally, the end of the sleeve abuts against the inner ring of the bearing.

[0010] Optionally, the locking screw abuts against the inner ring of the bearing.

[0011] Optionally, the pivot has a through hole at its center, the pivot passes through the through hole, and the pivot is bonded to the inner wall of the through hole.

[0012] Optionally, the outer wall of the end of the shaft away from the locking screw is provided with an external thread.

[0013] Optionally, the rotor assembly further includes blades and a nut, the blades being sleeved on the rotating shaft, and the nut being screwed onto the external thread so that the nut and the rotating base together clamp the blades.

[0014] Optionally, the rotating base includes a rotating frame and a plurality of magnetic tiles, the rotating frame being disposed on the rotating shaft, and each of the magnetic tiles being disposed on the inner side wall of the rotating frame.

[0015] Optionally, the stator base includes a base and a seat body, the rotating hole and the locking step are both located inside the base, the seat body is sleeved on the outer side wall of the base, and each of the winding groups is located on the seat body.

[0016] Optionally, the base is provided with a plurality of mounting protrusions at one end near the locking screw.

[0017] Optionally, the mounting protrusion has a through hole.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] This utility model discloses a high-reliability brushless motor, comprising a stator base and a rotor assembly. The stator base has a rotating hole at its center, with a locking step at each end of the hole. Several circumferentially distributed winding groups are arranged on the outer wall of the stator base. The rotor assembly includes a rotating shaft, a locking screw, a sleeve, a rotating base, and two bearings. The two bearings are respectively positioned within the two locking steps. The rotating shaft passes through the two bearings sequentially. The sleeve is fitted onto the rotating shaft, with both ends abutting against the two bearings. The rotating base is positioned on the rotating shaft, abutting against one of the bearings. The locking screw is screwed onto the end of the rotating shaft furthest from the rotating base, abutting against the other bearing. Thus, the two bearings are held together by the intermediate sleeve to form a relatively unified structure. When the drive propeller is fixedly mounted on the rotating shaft, the pulling force of the shaft is simultaneously applied to both bearings when the shaft is pulled by the propeller. Compared to existing structures where only a single bearing is affected, this effectively improves the bearing's compressive strength and the motor's tensile strength, resulting in a more reliable structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a high-reliability brushless motor according to one embodiment of the present invention;

[0022] Figure 2 for Figure 1 The diagram shows a cross-sectional structure of a highly reliable brushless motor.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. High-reliability brushless motor; 100. Stator base; 200. Rotor assembly; 111. Rotary hole; 112. Locking step; 300. Winding assembly; 210. Shaft; 220. Locking screw; 230. Sleeve; 240. Rotary base; 250. Bearing; 211. External thread; 260. Blade; 270. Nut; 241. Rotary frame; 242. Magnet; 110. Base; 120. Seat body; 130. Mounting protrusion; 131. Through hole. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0030] like Figure 1 and Figure 2 As shown, a high-reliability brushless motor 10 includes a stator base 100 and a rotor assembly 200. The stator base 100 has a rotating hole 111 at its center, with a locking step 112 at each end of the rotating hole 111. Several circumferentially distributed winding groups 300 are arranged on the outer wall of the stator base 100. The rotor assembly 200 includes a rotating shaft 210, locking screws 220, a sleeve 230, a rotating base 240, and two bearings 250. The two bearings 250 are... The shaft 210 is set within two locking steps 112. Two bearings 250 are sequentially inserted through the shaft 210. A sleeve 230 is fitted onto the shaft 210, with both ends of the sleeve 230 abutting against the two bearings 250 respectively. A rotating seat 240 is set on the shaft 210 so that the rotating seat 240 abuts against one of the bearings 250. A locking screw 220 is screwed onto the end of the shaft 210 away from the rotating seat 240, and the locking screw 220 abuts against the other bearing 250.

[0031] It should be noted that the stator base 100 has a rotating hole 111 along its axial direction, and the rotating hole 111 is a circular hole. A retaining step 112 is formed at each end of the rotating hole 111, and the inner diameter of the retaining step 112 is larger than the inner diameter of the rotating hole 111. Two bearings 250 are fitted into the two retaining steps 112. The rotating shaft 210 passes through the two bearings 250 in sequence. A rotating seat 240 is fitted and fixed onto the rotating shaft 210, and the rotating seat 240 abuts against one of the two bearings 250. It should be noted that the rotating seat 240 abuts against the bearing 250 located on the front side of the stator base 100, where the front side of the stator base 100 refers to the side used for subsequent installation of the model aircraft propeller, and the rear side is the side away from the front side. A sleeve 230 is fitted onto the rotating shaft 210, and the sleeve 230 is located between the two bearings 250, with both ends of the sleeve 230 abutting against the two bearings 250 respectively. The locking screw 220 is screwed onto the axial position of the end of the rotating shaft 210 away from the rotary seat 240, and the locking screw 220 abuts against the other of the two bearings 250, that is, the locking screw 220 abuts against the bearing 250 located on the rear side of the stator seat 100. It should be noted that the fixed installation structure between the rotary seat 240 and the rotating shaft 210 should not allow for displacement, for example, it can be fixed by gluing. Thus, the rotating shaft 210, together with the rotating base 240, is moved towards the end of the locking screw 220, so that the rotating base 240 abuts against the bearing 250. Then, the locking screw 220 is screwed in and locked onto the rotating shaft 210, so that the locking screw 220 abuts against the other bearing 250. In this way, the two bearings 250 are supported by the intermediate sleeve 230 to form a relative whole. When the drive propeller is subsequently fixedly installed on the rotating shaft 210, when the rotating shaft 210 is pulled by the drive propeller, the tension of the rotating shaft 210 will act on both bearings 250 at the same time. Compared with the existing structure that only acts on a single bearing 250, it can effectively improve the compressive strength of the bearing 250, effectively improve the tensile strength of the motor, and make the structure more reliable.

[0032] like Figure 2 As shown, in one embodiment, the end of the sleeve 230 abuts against the inner ring of the bearing 250.

[0033] It should be noted that the sleeve 230 abuts against the inner ring of the bearing 250, while the locking step 112 abuts against the outer ring of the bearing 250. In this way, the sleeve 230 rotates synchronously with the rotating shaft 210, and the sleeve 230 reliably abuts against the bearing 250, so that the two bearings 250 form a relatively integral unit through the sleeve 230.

[0034] like Figure 2 As shown, in one embodiment, the locking screw 220 abuts against the inner ring of the bearing 250. This ensures that the locking screw 220, the inner ring of the bearing 250, and the shaft 210 are reliably fixed together.

[0035] like Figure 2 As shown, in one embodiment, the pivot 240 has a through hole at its center, through which the pivot 210 passes, and the pivot 210 is glued to the inner wall of the through hole. In this way, the pivot 210 and the pivot 240 are bonded and fixed together by glue, so that the pivot 210 and the pivot 240 are fixed as one unit.

[0036] like Figure 1 As shown, in one embodiment, an external thread 211 is provided on the outer wall of the end of the shaft 210 away from the locking screw 220. In this way, the external thread 211 facilitates the fixed installation of the model aircraft's drive propeller on the shaft 210.

[0037] like Figure 1 As shown, in one embodiment, the rotor assembly 200 further includes a blade 260 and a nut 270. The blade 260 is sleeved on the rotating shaft 210, and the nut 270 is screwed onto the external thread 211 so that the nut 270 and the rotating seat 240 together clamp the blade 260.

[0038] It should be noted that the external thread 211 allows the nut 270 to be screwed onto the shaft 210, thereby enabling the nut 270 and the rotor 240 to clamp and secure the blade 260, ensuring that the blade 260 and the shaft 210 are coaxially mounted. This ensures the coaxial mounting of the blade 260 and the shaft 210, helping to maintain balance during high-speed rotation, reducing vibration and noise, and improving the motor's operational stability and reliability. The nut 270, fixed to the shaft 210 by the external thread 211, together with the rotor 240, clamps the blade 260, ensuring that the blade 260 will not loosen during high-speed rotation. This increases the fixing strength of the blade 260, preventing loosening under high load or high speed, and improving the motor's safety and service life. The design of the nut 270 and the external thread 211 makes the installation and removal of the blade 260 more convenient, simplifying the assembly process and facilitating later maintenance and replacement, thus reducing maintenance costs. The fastening method using nut 270 and external thread 211 is simple and reliable, reducing additional fasteners and complex assembly processes, and improving production efficiency.

[0039] like Figure 2 As shown, in one embodiment, the rotating base 240 includes a rotating frame 241 and a plurality of magnetic tiles 242. The rotating frame 241 is disposed on the rotating shaft 210, and each magnetic tile 242 is disposed on the inner side wall of the rotating frame 241.

[0040] It should be noted that by mounting the rotating frame 241 on the rotating shaft 210 and arranging several magnetic tiles 242 on the inner wall of the rotating frame 241, the magnetic tiles 242 are evenly distributed on the inner wall of the rotating frame 241, forming a uniform magnetic field distribution. This ensures the electromagnetic performance of the motor. The rotating frame 241 is fixed to the rotating shaft 210, ensuring the coaxiality of the rotating frame 241 and the rotating shaft 210, reducing vibration and noise during operation. The magnetic tiles 242 are installed on the inner wall of the rotating frame 241 by bonding or other fixing methods, making the installation of the magnetic tiles 242 more convenient, simplifying the manufacturing process, and reducing production costs. The design using the rotating frame 241 and magnetic tiles 242 is simple and reliable in structure, reducing additional fasteners and complex assembly processes, and improving production efficiency.

[0041] like Figure 1 As shown, in one embodiment, the stator base 100 includes a base 110 and a base body 120. The rotating hole 111 and the locking step 112 are both located inside the base 110. The base body 120 is sleeved on the outer side wall of the base 110, and each winding group 300 is located on the base body 120.

[0042] It should be noted that the rotating hole 111 and the locking step 112 are both located inside the base 110, and the seat body 120 is fitted onto the outer side wall of the base 110. The winding assembly 300 is installed on the seat body 120. In this way, the base 110 and the seat body 120 are separate and independent structures, and the combination of these structures facilitates the production and manufacturing of the stator seat 100.

[0043] like Figure 1 As shown, in one embodiment, the base 110 is provided with a plurality of mounting protrusions 130 at one end near the locking screw 220.

[0044] It should be noted that by providing several mounting protrusions 130 at one end of the base 110 near the locking screw 220, the motor is easily installed and secured. For example, the mounting protrusions 130 and the base 110 are integrally formed, thus ensuring a stable installation of the motor. Furthermore, the multiple mounting protrusions 130 can distribute the stress at the fixing point, avoiding localized stress concentration and improving the structural strength and service life of the motor.

[0045] like Figure 1 As shown, in one embodiment, the mounting protrusion 130 has a through hole 131. It should be noted that the through hole 131 is used to pass a bolt to secure the base 110. This facilitates the installation and fixation of the motor.

[0046] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A highly reliable brushless motor, characterized in that, include: A stator base, wherein a rotating hole is formed at the center of the stator base, and a locking step is provided at each end of the rotating hole; and several winding groups are arranged in a circular pattern on the outer wall of the stator base; and A rotor assembly includes a rotating shaft, a locking screw, a sleeve, a rotating base, and two bearings. The two bearings are respectively disposed within two locking steps. The rotating shaft passes through the two bearings in sequence. The sleeve is sleeved on the rotating shaft, and both ends of the sleeve abut against the two bearings respectively. The rotating base is disposed on the rotating shaft so that it abuts against one of the bearings. The locking screw is screwed onto the end of the rotating shaft away from the rotating base, and the locking screw abuts against the other bearing.

2. The high-reliability brushless motor according to claim 1, characterized in that, The end of the sleeve abuts against the inner ring of the bearing.

3. The high-reliability brushless motor according to claim 1, characterized in that, The locking screw abuts against the inner ring of the bearing.

4. The high-reliability brushless motor according to claim 1, characterized in that, The pivot has a through hole at its center, the pivot passes through the through hole, and the pivot is bonded to the inner wall of the through hole.

5. The high-reliability brushless motor according to claim 1, characterized in that, The outer wall of the end of the shaft away from the locking screw has an external thread.

6. The high-reliability brushless motor according to claim 5, characterized in that, The rotor assembly also includes blades and a nut. The blades are sleeved on the rotating shaft, and the nut is screwed onto the external thread so that the nut and the rotating base together clamp the blades.

7. The high-reliability brushless motor according to claim 1, characterized in that, The rotating base includes a rotating frame and several magnetic tiles. The rotating frame is disposed on the rotating shaft, and each of the magnetic tiles is disposed on the inner side wall of the rotating frame.

8. The high-reliability brushless motor according to claim 1, characterized in that, The stator base includes a base and a seat body. The rotating hole and the locking step are both located inside the base. The seat body is sleeved on the outer side wall of the base, and each of the winding groups is located on the seat body.

9. The high-reliability brushless motor according to claim 8, characterized in that, The base has several mounting protrusions at one end near the locking screw.

10. The high-reliability brushless motor according to claim 9, characterized in that, The mounting protrusion has a through hole.

Images