Outer rotor motor main shaft and outer rotor motor

Abstract

The utility model discloses an external rotor motor main shaft and an external rotor motor, a stator blocking part is integrally formed with a main shaft body by a main shaft body which protrudes outwards through die extrusion in the upsetting process, and a lower bearing blocking part is integrally formed with the main shaft body by a main shaft body which protrudes outwards through die extrusion in the upsetting process. The stator assembly can be effectively prevented from moving downwards relative to the main shaft body, the lower bearing can be effectively prevented from moving upwards relative to the main shaft body, the stator assembly, the lower bearing and the main shaft body are connected more firmly and reliably, the structure is more stable, and production efficiency and structural strength can be effectively improved. In addition, the stator blocking part and the lower bearing blocking part are arranged at an interval, and the interval section is formed therebetween, thereby facilitating the installation of the stator assembly and preventing the interference between the stator assembly and the lower bearing from affecting the performance of the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially a kind of outer rotor motor main shaft, outer rotor motor. BACKGROUND

[0002] The main shaft of motor is usually blocked by snap spring to prevent the movement of stator assembly and bearing along the axial direction of the main shaft. However, the snap spring is prone to loosen and deform after supporting the stator assembly and bearing for a long time, which affects the stability of the stator assembly, bearing and main shaft, and causes the instability and insecurity between the stator assembly, bearing and main shaft. In addition, there are problems of multiple assembly steps and poor structural stability.

[0003] In addition, the structure using snap spring needs to have a mounting groove on the main shaft for installing the snap spring, which requires high assembly accuracy and has the characteristics of high production and processing difficulty and assembly difficulty.

[0004] Therefore, the utility model is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects of the prior art, and provides an outer rotor motor main shaft and an outer rotor motor, which have the characteristics of stable and reliable structure and few assembly steps.

[0006] The utility model is implemented by the following technical solutions.

[0007] An outer rotor motor main shaft comprises a main shaft body 1, which has an upper bearing mounting section 11, an upper bearing blocking part 12, a stator mounting section 13, a stator blocking part 14, a lower bearing blocking part 15 and a lower bearing mounting section 16 from top to bottom, the stator blocking part 14 and the lower bearing blocking part 15 are arranged at intervals, and an interval section 17 is formed between them.

[0008] The upper bearing mounting section 11 is used for mounting an upper bearing 111.

[0009] The upper bearing blocking part 12 is used for mounting a snap spring 121 to block and limit the downward movement of the upper bearing 111 along the axial direction.

[0010] The stator mounting section 13 is used for fixedly mounting and connecting a stator assembly 2.

[0011] The stator blocking part 14 is integrally formed with the main shaft body 1 by extrusion outward during the upsetting process of the main shaft body 1 by a die, and is used for blocking and limiting the downward movement of the stator assembly 2 along the axial direction.

[0012] The lower bearing mounting section 16 is used for mounting the lower bearing 161.

[0013] The lower bearing blocking part 15 is integrally formed with the main shaft body 1 by extrusion outward protrusion during the upsetting process, and is used for blocking and limiting the upward axial movement of the lower bearing 161.

[0014] The main shaft body 1 is provided with the extrusion forming section 18 at the position of the stator blocking part 14 and the extrusion forming section 18 at the position of the lower bearing blocking part 15.

[0015] The upper bearing mounting section 11 is in interference fit with the inner ring of the upper bearing 111, and the lower bearing mounting section 16 is in interference fit with the inner ring of the lower bearing 161.

[0016] The outer wall of the stator mounting section 13 is provided with a plurality of stator mounting stripes 131 arranged in a circumferential direction, and the stator assembly 2 is in interference fit with the stator mounting section 13 through the stator mounting stripes 131.

[0017] The upper bearing blocking part 12 is arranged in a spaced manner with the stator mounting section 13 to form the spacing section 17.

[0018] The main shaft body 1 is hollow.

[0019] The utility model discloses an outer rotor motor, including stator assembly 2, rotor assembly 3 and like the outer rotor motor main shaft of the above-mentioned, stator assembly 2 is fixedly installed in stator mounting section 13 and stator assembly 2 lower end and stator blocking part 14 blocking cooperation, the lower bearing mounting section 16 is installed with lower bearing 161, and the inner ring upper end of lower bearing 161 is blocked with lower bearing blocking part 15 cooperation, the upper bearing mounting section 11 is installed with upper bearing 111, and the inner ring lower end of upper bearing 111 is blocked with the snap spring 121 of the upper bearing blocking part 12 cooperation, and the upper and lower parts of rotor assembly 3 are fixedly connected with the outer ring of upper bearing 111 and lower bearing 161 respectively.

[0020] The rotor assembly 3 includes the upper rotor shell 31 connected with the outer ring of the upper bearing 111 and the lower rotor shell 32 connected with the outer ring of the lower bearing 161, and the upper rotor shell 31 and the lower rotor shell 32 are detachably connected.

[0021] The utility model discloses still provide a kind of assembly method of outer rotor motor, the outer rotor motor includes stator assembly 2, rotor assembly 3 and main shaft body 1, the main shaft body 1 has upper bearing mounting section 11, upper bearing blocking portion 12, stator mounting section 13, stator blocking portion 14, lower bearing blocking portion 15 and lower bearing mounting section 16 from top to bottom in sequence, the stator blocking portion 14 is spaced apart with lower bearing blocking portion 15, and interval section 17 is formed between, the main shaft body 1 and the stator blocking portion 14 position are equipped with the extrusion forming section 18 of stator blocking portion 14 that is conveniently outwardly protruding and shaping, the main shaft body 1 and the lower bearing blocking portion 15 position are equipped with the extrusion forming section 18 of lower bearing blocking portion 15 that is conveniently outwardly protruding and shaping;

[0022] The upper bearing mounting section 11 is used for installing the upper bearing 111;

[0023] The upper bearing blocking portion 12 is used for installing the snap spring 121 to block and limit the upward movement of the upper bearing 111 along the axial direction;

[0024] The stator mounting section 13 is used for fixedly installing and connecting with the stator assembly 2;

[0025] The stator blocking portion 14 is integrally formed with the main shaft body 1 by extruding outwardly protruding in the process of upsetting through a die, and the stator blocking portion 14 is used for blocking and limiting the downward movement of the stator assembly 2 along the axial direction;

[0026] The lower bearing mounting section 16 is used for installing the lower bearing 161;

[0027] The lower bearing blocking portion 15 is integrally formed with the main shaft body 1 by extruding outwardly protruding in the process of upsetting through a die, and the lower bearing blocking portion 15 is used for blocking and limiting the upward movement of the lower bearing 161 along the axial direction;

[0028] The assembly method comprises the following steps:

[0029] S1, the main shaft body 1 with a length of L1 is processed, so that the stator blocking portion 14 and the lower bearing blocking portion 15 positions of the main shaft body 1 are respectively reserved with extrusion forming sections 18;

[0030] S2, the upper part of the main shaft body 1 is extruded by the upsetting die to make the extrusion forming section 18 at the position of the stator blocking portion 14 outwardly protrude to form the stator blocking portion 14 integrally formed with the main shaft body 1, and then the lower part of the main shaft body 1 is extruded by the upsetting die to make the extrusion forming section 18 at the position of the lower bearing blocking portion 15 outwardly protrude to form the lower bearing blocking portion 15 integrally formed with the main shaft body 1, so that the length of the main shaft body 1 after upsetting is L2, L2 is the required standard length, and L2 < L1;

[0031] S3, the stator assembly 2 is set from top to bottom on the stator mounting section 13 so that the lower end of the stator assembly 2 is blocked with the stator blocking part 14, the lower bearing 161 is set from bottom to top on the lower bearing mounting section 16 so that the upper end of the inner ring of the lower bearing 161 is blocked with the lower bearing blocking part 15, then the circlip 121 is clamped on the upper bearing blocking part 12, then the upper bearing 111 is set from top to bottom on the upper bearing mounting section 11 so that the lower end of the inner ring of the upper bearing 111 is blocked with the circlip 121, and finally the outer ring of the stator assembly 2 is connected with the lower bearing 161 and the upper bearing 111.

[0032] Compared with the prior art, the utility model has the advantages of:

[0033] 1、The stator blocking part and the lower bearing blocking part are integrally formed with the main shaft body by extrusion outward during the upsetting process, which can effectively prevent the stator assembly from moving downward relative to the main shaft body and the lower bearing from moving upward relative to the main shaft body, so that the connection of the stator assembly, the lower bearing and the main shaft body is more firm and reliable, and the structure is more stable, and the production efficiency and structural strength can be effectively improved.

[0034] 2、In order to facilitate the upsetting forming, the main shaft body has an extrusion forming section.

[0035] 3、The utility model discloses a stator blocking part and a lower bearing blocking part replace the structure of the prior art using a circlip to block, which has the characteristics of stable structure and fewer assembly steps.

[0036] 4、The outer rotor motor assembled by the assembly method of the utility model has the characteristics of stable and reliable structure and high assembly efficiency.

DESCRIPTION OF DRAWINGS

[0037] The specific embodiments of the utility model will be further described in detail below with reference to the drawings, in which:

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the motor in the utility model.

[0039] Figure 2 It is a schematic diagram of the cross-sectional structure of the motor in the utility model.

[0040] Figure 3 It is a schematic diagram of the three-dimensional structure of the main shaft in the utility model.

[0041] Figure 4 It is a schematic diagram of the cross-sectional structure of the main shaft in the utility model.

[0042] Figure 5 For Figure 4 Enlarged view of the middle A.

[0043] Figure 6 For the cross-sectional structure schematic diagram of the main shaft in the utility model is not to block the stator and the lower bearing blocking part.

[0044] Figure 7 For the cross-sectional structure schematic diagram of the assembly jig for assembling the stator assembly and the main shaft of the utility model.

Specific embodiments

[0045] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0046] As Figures 1-7 shown, the utility model discloses an outer rotor motor main shaft, including main shaft body 1, the main shaft body 1 has upper bearing mounting section 11, upper bearing blocking part 12, stator mounting section 13, stator blocking part 14, lower bearing blocking part 15 and lower bearing mounting section 16 from top to bottom in turn, the stator blocking part 14 is arranged with interval with lower bearing blocking part 15, and interval section 17 is formed between them;

[0047] The upper bearing mounting section 11 is used for installing upper bearing 111;

[0048] The upper bearing blocking part 12 is used for installing snap spring 121 to block and limit upper bearing 111 along the axial downward movement;

[0049] The stator mounting section 13 is used for fixedly installing and connecting with stator assembly 2;

[0050] The stator blocking part 14 is integrally formed with the main shaft body 1 by extruding outward during the process of heading and pressing by mould, and the stator blocking part 14 is used for blocking and limiting stator assembly 2 along the axial downward movement;

[0051] The lower bearing mounting section 16 is used for installing lower bearing 161;

[0052] The lower bearing blocking part 15 is integrally formed with the main shaft body 1 by extruding outwardly protruding through a die during the upsetting process, and is used for blocking the lower bearing 161 from moving upward along the axial direction.

[0053] As shown in Figure 6 In order to facilitate the upsetting forming, the main shaft body 1 and the position of the stator blocking part 14 are provided with an extrusion forming section 18 for facilitating the outward protruding to form the stator blocking part 14, and the main shaft body 1 and the position of the lower bearing blocking part 15 are provided with an extrusion forming section 18 for facilitating the outward protruding to form the lower bearing blocking part 15.

[0054] The upper bearing mounting section 11 is in interference fit with the inner ring of the upper bearing 111, and the lower bearing mounting section 16 is in interference fit with the inner ring of the lower bearing 161, which can ensure that the bearing does not loosen due to vibration or impact during operation, improve stability, and improve the carrying capacity of the bearing. In addition, it can also reduce the vibration and noise of the bearing during operation, and improve the mechanical precision.

[0055] The outer wall of the stator mounting section 13 is provided with a plurality of circumferentially spaced stator mounting stripes 131, and the stator assembly 2 is in interference fit with the stator mounting section 13 through the stator mounting stripes 131, which can improve the reliability and stability of the connection structure and reduce the number of parts.

[0056] As shown in Figures 2-4 The upper bearing blocking part 12 and the stator mounting section 13 are spaced apart to form a spacing section 17, which can facilitate the installation of the stator assembly and avoid interference between the stator assembly and the upper bearing to affect the performance of the motor.

[0057] In order to reduce the weight of the main shaft body, reduce the production cost and facilitate wiring, the main shaft body 1 is hollow.

[0058] As shown in Figures 1-6As shown, the utility model discloses an outer rotor motor, including stator subassembly 2, rotor subassembly 3 and the outer rotor motor main shaft as described above, stator subassembly 2 is fixedly installed to stator mounting section 13 and stator subassembly 2 lower end and stator blocking portion 14 blocking cooperation, lower bearing mounting section 16 is installed with lower bearing 161, the inner ring upper end of lower bearing 161 and lower bearing blocking portion 15 blocking cooperation, upper bearing mounting section 11 is installed with upper bearing 111, the inner ring lower end of upper bearing 111 and the snap spring 121 of blocking portion 12 installed to upper bearing blocking portion 12 blocking cooperation, the upper and lower parts of rotor subassembly 3 are fixedly connected with the outer ring of upper bearing 111 and lower bearing 161 respectively. The utility model discloses outer rotor motor has the characteristics of stable and reliable structure, and the assembly efficiency is high.

[0059] In order to be convenient for dismounting, the rotor assembly 3 includes the upper rotor shell 31 connected with the outer ring of the upper bearing 111 and the lower rotor shell 32 connected with the outer ring of the lower bearing 161, and the upper rotor shell 31 and the lower rotor shell 32 are detachably connected.

[0060] As shown, Figure 7 The stator subassembly 2 is positioned in the positioning recess at the upper end position of the assembly jig, then the main shaft body is arranged in the stator hole of the stator subassembly 2, and finally the main shaft body is pressed by assembling a cylinder or other pushing piece until the stator mounting section of the main shaft body is in interference fit with the stator hole.

[0061] The utility model discloses an assembly method of an outer rotor motor, the outer rotor motor includes a stator subassembly 2, a rotor subassembly 3 and a main shaft body 1, the main shaft body 1 has an upper bearing mounting section 11, an upper bearing blocking portion 12, a stator mounting section 13, a stator blocking portion 14, a lower bearing blocking portion 15 and a lower bearing mounting section 16 from top to bottom, the stator blocking portion 14 and the lower bearing blocking portion 15 are arranged at intervals, and a spacing section 17 is formed between them, the main shaft body 1 is provided with an extrusion forming section 18 at the position of the stator blocking portion 14, which is convenient for protruding outward to form the stator blocking portion 14, and the main shaft body 1 is provided with an extrusion forming section 18 at the position of the lower bearing blocking portion 15, which is convenient for protruding outward to form the lower bearing blocking portion 15.

[0062] The upper bearing mounting section 11 is used for mounting the upper bearing 111.

[0063] The upper bearing blocking portion 12 is used for mounting the snap spring 121 to block and limit the axial downward movement of the upper bearing 111.

[0064] The stator mounting section 13 is used for fixedly mounting and connecting with the stator subassembly 2.

[0065] The stator blocking part 14 is integrally formed with the main shaft body 1 by extruding outward by a die during the upsetting process, and is used for blocking and limiting the axial downward movement of the stator assembly 2;

[0066] The lower bearing mounting section 16 is used for mounting the lower bearing 161;

[0067] The lower bearing blocking part 15 is integrally formed with the main shaft body 1 by extruding outward by a die during the upsetting process, and is used for blocking and limiting the axial upward movement of the lower bearing 161;

[0068] The assembling method comprises the following steps:

[0069] S1, machining the main shaft body 1 with a length of L1, so that the stator blocking part 14 and the lower bearing blocking part 15 positions of the main shaft body 1 are respectively reserved with extrusion forming sections 18;

[0070] S2, extruding the upper part of the main shaft body 1 by a upsetting die to make the extrusion forming section 18 at the position of the stator blocking part 14 outwardly protrude to form the stator blocking part 14 integrally formed with the main shaft body 1, and then extruding the lower part of the main shaft body 1 by a upsetting die to make the extrusion forming section 18 at the position of the lower bearing blocking part 15 outwardly protrude to form the lower bearing blocking part 15 integrally formed with the main shaft body 1, so that the length of the main shaft body 1 after upsetting is L2, L2 is the required standard length, and L2 < L1;

[0071] S3, sleeving the stator assembly 2 from top to bottom on the stator mounting section 13 to make the lower end of the stator assembly 2 in blocking cooperation with the stator blocking part 14, sleeving the lower bearing 161 from bottom to top on the lower bearing mounting section 16 to make the upper end of the inner ring of the lower bearing 161 in blocking cooperation with the lower bearing blocking part 15, then clamping the snap spring 121 on the upper bearing blocking part 12, then sleeving the upper bearing 111 from top to bottom on the upper bearing mounting section 11 to make the lower end of the inner ring of the upper bearing 111 in blocking cooperation with the snap spring 121, and finally connecting the outer rings of the stator assembly 2, the lower bearing 161 and the upper bearing 111. The outer rotor motor assembled by the assembling method has the characteristics of stable and reliable structure and high assembling efficiency.

Claims

1. An outer rotor electric motor spindle, characterized by The main shaft body (1) has an upper bearing mounting section (11), an upper bearing blocking part (12), a stator mounting section (13), a stator blocking part (14), a lower bearing blocking part (15) and a lower bearing mounting section (16) from top to bottom. The upper bearing mounting section (11) is used for mounting the upper bearing (111). The upper bearing blocking part (12) is used for mounting the clamping spring (121) to block and limit the upward movement of the upper bearing (111) along the axial direction. The stator mounting section (13) is used for fixedly mounting the stator assembly (2). The stator blocking part (14) is integrally formed with the main shaft body (1) by extruding outward during the upsetting process, and is used for blocking and limiting the downward movement of the stator assembly (2) along the axial direction. The lower bearing mounting section (16) is used for mounting the lower bearing (161). The lower bearing blocking part (15) is integrally formed with the main shaft body (1) by extruding outward during the upsetting process, and is used for blocking and limiting the upward movement of the lower bearing (161) along the axial direction.

2. An outer rotor motor spindle according to claim 1, characterized in that The main shaft body (1) is provided with an extrusion forming section (18) at the position of the stator blocking part (14) to facilitate the formation of the stator blocking part (14), and is provided with an extrusion forming section (18) at the position of the lower bearing blocking part (15) to facilitate the formation of the lower bearing blocking part (15).

3. The outer rotor motor spindle of claim 1, wherein The upper bearing mounting section (11) is in interference fit with the inner ring of the upper bearing (111), and the lower bearing mounting section (16) is in interference fit with the inner ring of the lower bearing (161).

4. The outer rotor motor spindle of claim 1, wherein The outer wall of the stator mounting section (13) is provided with a plurality of circumferentially spaced stator mounting stripes (131), and the stator assembly (2) is in interference fit with the stator mounting section (13) through the stator mounting stripes (131).

5. The outer rotor motor spindle of claim 1, wherein The upper bearing blocking part (12) is spaced apart from the stator mounting section (13) to form a spacing section (17).

6. The outer rotor motor spindle of claim 1, wherein The main shaft body (1) is hollow.

7. An external rotor electric machine characterized by The outer rotor motor main shaft comprises a stator assembly (2), a rotor assembly (3) and a main shaft body according to any one of claims 1-6, the stator assembly (2) is fixedly mounted on the stator mounting section (13), and the lower end of the stator assembly (2) is in blocking fit with the stator blocking part (14), the lower bearing (161) is mounted on the lower bearing mounting section (16), the inner ring upper end of the lower bearing (161) is in blocking fit with the lower bearing blocking part (15), the upper bearing (111) is mounted on the upper bearing mounting section (11), the inner ring lower end of the upper bearing (111) is in blocking fit with the clamping spring (121) mounted on the upper bearing blocking part (12), and the upper and lower parts of the rotor assembly (3) are fixedly connected with the outer rings of the upper bearing (111) and the lower bearing (161) respectively.

8. An external rotor electric motor as claimed in claim 7, characterised in that The rotor assembly (3) comprises an upper rotor housing (31) connected with the outer ring of the upper bearing (111) and a lower rotor housing (32) connected with the outer ring of the lower bearing (161), and the upper rotor housing (31) and the lower rotor housing (32) are detachably connected.

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