A new type of virtual positionless brushless motor structure

Abstract

The utility model discloses a new -type no virtual position brushless motor structure, it includes stator subassembly, rotor subassembly, stator subassembly includes fixed base, winding group, and the middle part of fixed base is provided with support column, and winding group is fixedly sleeved in the periphery of support column, and fixed base is set through -hole, rotor subassembly includes the casing, magnetic ring, mandrel, and the magnetic ring is tightly installed in the inner circumferential surface of casing, and the lower end portion of mandrel is inserted into the through -hole of fixed base, and is installed with one ball bearing between the lower end portion of mandrel and fixed base, the center plane A of winding group and the center flat board B of magnetic ring are arranged staggeredly, and the center flat board B is located below the center plane A, and the lower end side sleeve of mandrel lower end portion is blocked elastic baffle ring under ball bearing, and the inner wall of fixed base through -hole lower end portion is provided with the shoulder, and installs silica gel gasket between the shoulder and ball bearing. Through above -mentioned structural design, the utility model has novel, good stability and good advantages of the performance of resisting external impact of structural design.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor technology, and in particular to a novel brushless motor structure with no play. Background Technology

[0002] A brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because a brushless DC motor operates in a self-controlled manner, it does not require an additional starting winding on the rotor like a synchronous motor that starts under heavy load with frequency conversion speed regulation, nor does it experience oscillation or loss of synchronism when the load changes abruptly.

[0003] Among them, the Chinese utility model patent with patent number ZL202420025909.1 and patent name: A high-stability brushless motor for drones, specifically discloses the following technical solution: A high-stability brushless motor for drones, including a stator assembly and a rotor assembly. The stator assembly includes a fixed base, a winding assembly, and a bearing. The fixed base extends towards the winding assembly and is provided with a support column. The winding assembly is sleeved on the outer periphery of the support column. The inner wall of the support column is radially recessed with a bearing mounting part for fixing the bearing. The outer ring of the bearing is engaged with the bearing. The mounting section includes a first bearing and a second bearing arranged sequentially from top to bottom. The bearing mounting section includes a first bearing mounting section and a second bearing mounting section adapted to the first bearing and the second bearing. The first bearing and the second bearing can be ball bearings. The rotor assembly includes a housing, a magnetic guide ring, an output shaft, and a magnet ring. The housing is rotatably mounted on the outer periphery of the winding group. The magnet ring and the magnetic guide ring are sequentially limited and embedded in the inner periphery of the housing. The magnet ring surrounds the outer periphery of the winding group. The magnetic guide ring is located between the magnet group and the inner wall of the housing. The output shaft passes through the housing and extends into the support column.

[0004] It should be noted that the high-stability brushless motors used in drones still have the following defects: they cannot effectively eliminate the misalignment (false displacement) generated when the rotor rotates, and they have poor resistance to external impacts. Utility Model Content

[0005] The purpose of this utility model is to provide a novel brushless motor structure with no backlash, which addresses the shortcomings of existing technologies. This novel brushless motor structure has a novel design, good stability, and good resistance to external impacts.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0007] A novel brushless motor structure with no play includes a stator assembly and a rotor assembly. The stator assembly includes a fixed base and a winding assembly. The fixed base has an upwardly protruding support column in the middle. The winding assembly is fixedly fitted around the support column. The fixed base has a through hole that penetrates vertically and passes through the core of the support column.

[0008] The rotor assembly includes a housing, a magnetic ring, and a spindle. The magnetic ring is fastened to the inner circumferential surface of the housing and is fitted around the winding group of the stator assembly. The spindle is fastened to the housing, and the lower end of the spindle is inserted into the through hole of the fixed seat. A ball bearing is installed between the lower end of the spindle and the fixed seat.

[0009] The central plane A of the winding assembly is staggered vertically from the central plate B of the magnetic ring, with the central plane B located below the central plane A.

[0010] The lower end of the spindle has a groove on the lower side of the ball bearing, and an elastic retaining ring is fitted in the groove; the inner wall of the lower end of the through hole of the fixed seat is provided with a shoulder, and a silicone gasket is installed between the shoulder and the ball bearing. The silicone gasket abuts against the upper end face of the outer ring of the ball bearing, and the elastic retaining ring abuts against the inner ring of the ball bearing with the upper end facing upward.

[0011] The lower end of the mandrel is fitted with a lower stainless steel washer located between the elastic retaining ring and the ball bearing, and the lower stainless steel washer is clamped between the elastic retaining ring and the inner ring of the ball bearing.

[0012] A stainless steel gasket is installed between the silicone gasket and the shoulder of the inner wall of the through hole.

[0013] The winding assembly is encapsulated with a waterproof adhesive layer, and the winding assembly is bonded to the fixing base through the waterproof adhesive layer to form a whole.

[0014] The housing includes an upper cover located on the upper side of the winding assembly, a ring sleeve riveted and fastened to the outer edge of the upper cover, a spindle passing through the center of the upper cover and riveted to the upper cover, and a magnetic ring fastened to the inner circumference of the ring sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects, specifically:

[0016] 1. Since the central plane A of the winding assembly and the central plate B of the magnetic ring are staggered vertically and the central plane B is located below the central plane A, the silicon steel sheets in the winding assembly of the stator assembly will generate a magnetic attraction force on the magnetic ring of the rotor assembly. This magnetic attraction force will generate an upward axial component force F. This upward axial component force F is greater than the overall weight of the rotor assembly. This will keep the elastic retaining ring sleeved on the lower end of the spindle facing upward and abutting against the inner ring of the ball bearing 3. In this way, the spindle and the entire rotor assembly can be kept in a fixed position when rotating, so as to eliminate play and make the motor performance more stable and better.

[0017] 2. Because the silicone pad remains compressed during operation, the rotor assembly can move within the compression range of the silicone pad under external impact, thus preventing motor damage.

[0018] 3. Therefore, the novel brushless motor structure with no play has the advantages of novel structural design, good stability and good resistance to external impact. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0022] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0023] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0024] exist Figures 1 to 4 This includes:

[0025] 1-Stator assembly; 11-Fixed base; 111-Support column; 112-Through hole; 113-Shoulder; 12-Winding assembly; 13-Waterproof adhesive layer; 2-Rotor assembly; 21-Housing; 211-Top cover; 212-Ring sleeve; 22-Magnetic ring; 23-Spindle; 231-Slot; 3-Ball bearing; 4-Elastic washer; 5-Silicone gasket; 61-Upper stainless steel gasket; 62-Lower stainless steel gasket. Detailed Implementation

[0026] The present invention will now be described in conjunction with specific embodiments.

[0027] Example 1, as Figures 1 to 3 As shown, a novel brushless motor structure with no play includes a stator assembly 1 and a rotor assembly 2. The stator assembly 1 includes a mounting base 11 and a winding assembly 12. A support column 111 protruding upwards is provided in the center of the mounting base 11. The winding assembly 12 is fixedly fitted around the support column 111. The mounting base 11 has a through hole 112 that extends vertically through and passes through the core of the support column 111. It should be explained that the winding assembly 12 in this embodiment includes a silicon steel sheet and a coil wound around the silicon steel sheet. The wire electrically connected to the coil extends to the outside of the mounting base 11.

[0028] Among them, such as Figures 1 to 4As shown, the rotor assembly 2 includes a housing 21, a magnetic ring 22, and a spindle 23. The magnetic ring 22 is fastened to the inner circumferential surface of the housing 21 and is fitted around the winding group 12 of the stator assembly 1. The spindle 23 is fastened to the housing 21. The lower end of the spindle 23 is inserted into the through hole 112 of the fixed seat 11, and a ball bearing 3 is installed between the lower end of the spindle 23 and the fixed seat 11.

[0029] Furthermore, such as Figure 3 As shown, the central plane A of the winding assembly 12 is staggered vertically from the central plate B of the magnetic ring 22, and the central plane B is located below the central plane A.

[0030] Furthermore, such as Figures 2 to 4 As shown, the lower end of the spindle 23 is provided with a groove 231 on the lower end side of the ball bearing 3, and an elastic retaining ring is fitted inside the groove 231; a shoulder 113 is provided on the inner wall of the lower end of the through hole 112 of the fixing seat 11, and a silicone gasket 5 is installed between the shoulder 113 and the ball bearing 3. The silicone gasket 5 abuts against the upper end face of the outer ring of the ball bearing 3, and the elastic retaining ring abuts against the inner ring of the ball bearing 3 from the top.

[0031] It should be emphasized that, since the central plane A of the winding assembly 12 and the central plate B of the magnetic ring 22 are staggered vertically and the central plane B is located below the central plane A, the silicon steel sheets in the winding assembly 12 of the stator assembly 1 will generate a magnetic attraction force on the magnetic ring 22 of the rotor assembly 2. This magnetic attraction force will generate an upward axial component force F, which is greater than the overall weight of the rotor assembly 2. This will cause the elastic retaining ring sleeved on the lower end of the spindle 23 to remain facing upward against the inner ring of the ball bearing 3, and cause the silicone gasket 5 to be in a compressed state. Through the limiting and blocking effect of the shoulder 113 on the inner wall of the through hole 112, this embodiment can keep the spindle 23 and the entire rotor assembly 2 in a fixed position when rotating, so as to eliminate the play and make the motor performance more stable and better.

[0032] It should be further emphasized that, since the silicone pad 5 is kept in a compressed state during operation, the rotor assembly 2 can move within the compression range of the silicone pad 5 under external impact, so as to avoid motor damage.

[0033] In summary, the novel brushless motor structure with no play in this embodiment has the advantages of novel structural design, good stability and good resistance to external impacts through the above structural design.

[0034] Example 2, as Figures 2 to 4 As shown, the difference between this embodiment 2 and embodiment 1 is that: the lower end of the spindle 23 is fitted with a lower stainless steel washer 62 located between the elastic retaining ring and the ball bearing 3, and the lower stainless steel washer 62 is clamped between the elastic retaining ring and the inner ring of the ball bearing 3.

[0035] Example 3, as Figure 3 and Figure 4 As shown, the difference between this embodiment 3 and embodiment 1 is that an upper stainless steel gasket 61 is installed between the silicone gasket 5 and the shoulder 113 of the inner wall of the through hole 112.

[0036] Example 4, as Figure 2 As shown, the difference between this embodiment four and embodiment one is that the winding assembly 12 is encapsulated with a waterproof adhesive layer 13, and the winding assembly 12 is bonded to the fixing seat 11 through the waterproof adhesive layer 13 to form a whole.

[0037] In the assembly process of stator assembly 1 in this embodiment 4, the winding assembly 12 is installed on the fixed base 11 and the winding assembly 12 is fitted around the support column 111. Then, a waterproof adhesive layer 13 is formed by the potting process and the waterproof adhesive layer 13 is potted and wrapped around the winding assembly 12. At this time, the fixed base 11 and the winding assembly 12 form an integral structure, and the waterproof adhesive layer 13 can effectively prevent the stator assembly 1 from being oxidized or corroded by water.

[0038] Example 5, such as Figures 1 to 3 As shown, the difference between this fifth embodiment and the first embodiment is that the housing 21 includes an upper cover 211 located on the upper side of the winding group 12, a ring 212 riveted and fastened to the outer edge of the upper cover 211, and a spindle 23 passing through the center of the upper cover 211, and the spindle 23 is riveted to the upper cover 211.

[0039] The magnetic ring 22 is fastened to the inner circumferential surface of the ring sleeve 212.

[0040] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A novel brushless motor structure with no false position, comprising a stator assembly (1) and a rotor assembly (2). The stator assembly (1) includes a fixed base (11) and a winding assembly (12). The fixed base (11) has an upwardly protruding support column (111) in the middle. The winding assembly (12) is fixedly fitted around the support column (111). The fixed base (11) has a through hole (112) that extends vertically through and passes through the core of the support column (111). The rotor assembly (2) includes a housing (21), a magnetic ring (22), and a spindle (23). The magnetic ring (22) is fastened to the inner circumferential surface of the housing (21), and the magnetic ring (22) is fitted around the winding group (12) of the stator assembly (1). The spindle (23) is fastened to the housing (21), and the lower end of the spindle (23) is inserted into the through hole (112) of the fixed seat (11). A ball bearing (3) is installed between the lower end of the spindle (23) and the fixed seat (11). Its features are: The central plane A of the winding assembly (12) and the central plate B of the magnetic ring (22) are staggered vertically, and the central plane B is located below the central plane A; The lower end of the spindle (23) is provided with a groove (231) on the lower end side of the ball bearing (3), and an elastic retaining ring is fitted inside the groove (231); a shoulder (113) is provided on the inner wall of the lower end of the through hole (112) of the fixed seat (11), and a silicone gasket (5) is installed between the shoulder (113) and the ball bearing (3). The silicone gasket (5) abuts against the upper end face of the outer ring of the ball bearing (3), and the elastic retaining ring abuts against the inner ring of the ball bearing (3) upward.

2. The novel brushless motor structure with zero play-offs according to claim 1, characterized in that: The lower end of the mandrel (23) is fitted with a lower stainless steel washer (62) located between the elastic retaining ring and the ball bearing (3), and the lower stainless steel washer (62) is clamped between the elastic retaining ring and the inner ring of the ball bearing (3).

3. The novel brushless motor structure with zero play-offs according to claim 1, characterized in that: An upper stainless steel gasket (61) is installed between the silicone gasket (5) and the shoulder (113) of the inner wall of the through hole (112).

4. The novel brushless motor structure with zero play-offs according to claim 1, characterized in that: The winding assembly (12) is encapsulated with a waterproof adhesive layer (13), and the winding assembly (12) is bonded to the fixing seat (11) through the waterproof adhesive layer (13) to form a whole.

5. The novel brushless motor structure with zero play-offs according to claim 1, characterized in that: The housing (21) includes an upper cover (211) located on the upper side of the winding group (12), and a ring (212) riveted and fastened to the outer edge of the upper cover (211). The spindle (23) passes through the center of the upper cover (211) and is riveted to the upper cover (211). The magnetic ring (22) is fastened to the inner circumferential surface of the ring (212).

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