Air gap adjusting device and axial flux motor

Abstract

The utility model relates to the technical field of axial magnetic flux motors, in particular to an air gap adjusting device and an axial magnetic flux motor, and aims to solve the problem that an air gap is difficult to adjust during assembly. The air gap adjusting device provided by the utility model comprises an adjusting seat, an adjusting sleeve and an adapter shaft, the adjusting seat is mounted on the motor shell, and the adapter shaft is connected with the motor shaft; the adjusting sleeve is rotatably installed on the adjusting seat, and the adapter shaft is inserted into the adjusting sleeve and is in threaded connection with the adjusting sleeve. According to the air gap adjusting device provided by the utility model, the relative positions of the rotor and the stator are fixed and adjustable through the adapter shaft, the adjusting sleeve and the adjusting seat, so that the air gap is adjustable. Through the threaded connection of the adjusting sleeve and the adapter shaft, the adapter sleeve generates axial displacement when the adjusting sleeve is rotated, so that the axial movement of the rotor is realized, the purpose of changing the distance between the rotor and the stator is achieved, and the accurate adjustment of the air gap is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flux motors, in particular to an air gap adjustment device and an axial flux motor. Background Art

[0002] When installing the rotor of an axial flux motor during assembly, the magnetic force of the permanent magnet on the rotor causes the rotor and stator to be attracted, resulting in displacement, making it difficult to ensure that the gaps between the two rotors and stators are the same. That is, during assembly, it is difficult to ensure that the widths of the two air gaps are the same, and it is difficult to adjust them after assembly, which affects the stability and efficiency of the motor. Utility Model Content

[0003] The utility model aims to provide an air gap adjustment device and an axial flux motor to solve the problem that the air gap is difficult to adjust during assembly.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0005] An air gap adjustment device comprises an adjustment seat, an adjustment sleeve and a transfer shaft;

[0006] The adjustment seat is installed on the motor housing, and the adapter shaft is connected to the motor shaft;

[0007] The adjusting sleeve is rotatably mounted on the adjusting seat, and the adapter shaft is inserted into the adjusting sleeve and threadedly connected with the adjusting sleeve.

[0008] Furthermore, the air gap adjustment device also includes a bearing, the bearing is installed on the adjustment seat, and the adjustment sleeve is inserted into the bearing.

[0009] Furthermore, the bearing is configured as a double-row angular contact ball bearing.

[0010] Furthermore, the bearing does not have a sealing cover.

[0011] Furthermore, the adjustment seat is provided with an oil inlet and an oil outlet.

[0012] Further, the adjustment seat includes a first connecting ring, a second connecting ring and a third connecting ring;

[0013] One end of the second connecting ring is connected to the first connecting ring, and the other end is connected to the third connecting ring. The first connecting ring, the second connecting ring and the third connecting ring form an annular groove, and the bearing is installed in the annular groove.

[0014] One end of the first connecting ring facing away from the second connecting ring is connected to the motor housing.

[0015] Furthermore, the adapter shaft includes a threaded section, the adjustment sleeve is provided with an internal thread, and the threaded section is inserted into the adjustment sleeve and threadedly connected to the adjustment sleeve.

[0016] Furthermore, the adjustment sleeve is provided with a plurality of tool slots arranged around its axis.

[0017] Furthermore, the air gap adjustment device also includes a round nut and a round nut stopping washer; one end of the bearing abuts against the adjustment sleeve, and the other end is provided with a round nut stopping washer and a round nut, the round nut stopping washer and the round nut are sleeved on the adjustment sleeve, and the round nut is threadedly connected to the adjustment sleeve.

[0018] Another aspect of the present invention provides an axial flux motor, comprising the above-mentioned air gap adjustment device.

[0019] Based on the above technical solutions, the technical effects that can be achieved by the utility model are:

[0020] The air gap adjustment device provided by the utility model comprises an adjustment seat, an adjustment sleeve and an adapter shaft; the adjustment seat is installed on the motor housing, and the adapter shaft is connected with the motor shaft; the adjustment sleeve is rotatably installed on the adjustment seat, and the adapter shaft is inserted into the adjustment sleeve and threadedly connected with the adjustment sleeve.

[0021] The air gap adjustment device provided by the utility model realizes the fixing and adjustment of the relative position of the rotor and the stator through the adapter shaft, the adjustment sleeve and the adjustment seat, thereby realizing the adjustable air gap, reducing the difficulty of assembly, and avoiding the rotor being bent by magnetic force due to uneven force and the reduction of motor efficiency due to the different sizes of the two air gaps.

[0022] Specifically, the rotor is fixedly mounted on the motor shaft and rotates synchronously with the motor shaft. The motor shaft, adapter shaft, adjustment sleeve, adjustment seat and motor housing are connected in sequence to realize the installation and relative position fixation of the motor shaft and the motor housing, and finally realize the relative position fixation of the rotor and the motor housing; at the same time, the stator is fixedly mounted on the motor housing, and the positions of the two are fixed. Therefore, the relative position fixation of the rotor and the stator can be realized through the air gap adjustment device. Among them, the rotation connection of the adjustment sleeve and the adapter shaft ensures the rotation of the motor shaft and the rotor.

[0023] When the air gap needs to be adjusted, the motor shaft is fixed to prevent it from rotating, and the adjusting sleeve is rotated to make the adjusting sleeve and the adapter shaft rotate relative to each other. At this time, due to the threaded connection, the adjusting sleeve and the adapter shaft can undergo axial relative displacement, that is, the adapter shaft undergoes axial displacement, thereby realizing axial movement of the motor shaft and the rotor, achieving the purpose of changing the distance between the rotor and the stator, and realizing precise adjustment of the air gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of the air gap adjustment device provided in an embodiment of the utility model;

[0026] Figure 2 A left side view of the air gap adjustment device provided by an embodiment of the utility model;

[0027] Figure 3 for Figure 2 Middle AA section view;

[0028] Figure 4 It is a cross-sectional schematic diagram of the adjustment seat;

[0029] Figure 5 It is a schematic diagram of the structure of the adjustment sleeve;

[0030] Figure 6 is a schematic diagram of the structure of the transfer shaft;

[0031] Figure 7 It is a schematic diagram of the internal structure of the motor;

[0032] Figure 8 for Figure 7 Middle BB section view.

[0033] Icons: 100-adjustment seat; 200-adjustment sleeve; 300-adjustment shaft; 400-bearing; 110-first connecting ring; 120-second connecting ring; 130-third connecting ring; 101-annular groove; 210-tool section; 220-matching section; 230-positioning section; 201-tool slot; 202-milling plane; 203-positioning slot; 310-threaded section; 320-transition section; 330-adjustment section; 340-installation section; 10-motor shaft; 20-rotor. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] It is difficult to ensure that the two air gaps of the axial flux motor are the same during assembly, and it is difficult to adjust after assembly, which affects the stability and work efficiency of the motor.

[0038] In view of this, the utility model provides an air gap adjustment device, including an adjustment seat 100, an adjustment sleeve 200 and an adapter shaft 300; the adjustment seat 100 is installed on the motor housing, and the adapter shaft 300 is connected to the motor shaft 10; the adjustment sleeve 200 is rotatably installed on the adjustment seat 100, and the adapter shaft 300 is inserted into the adjustment sleeve 200 and threadedly connected with the adjustment sleeve 200.

[0039] The air gap adjustment device provided by the utility model fixes and adjusts the relative positions of the rotor 20 and the stator through the adapter shaft 300, the adjustment sleeve 200 and the adjustment seat 100, thereby achieving adjustable air gap, reducing assembly difficulty, and avoiding uneven force causing the rotor 20 to be bent by magnetic force and the reduction in motor efficiency caused by the different sizes of the two air gaps.

[0040] Specifically, the rotor 20 is fixedly mounted on the motor shaft 10 and rotates synchronously with the motor shaft 10. The motor shaft 10, the adapter shaft 300, the adjustment sleeve 200, the adjustment seat 100 and the motor housing are connected in sequence to realize the installation and relative position fixation of the motor shaft 10 and the motor housing, and finally realize the relative position fixation of the rotor 20 and the motor housing; at the same time, the stator is fixedly mounted on the motor housing, and the positions of the two are fixed. Therefore, the relative position fixation of the rotor 20 and the stator can be realized by the air gap adjustment device. Among them, the rotation connection of the adjustment sleeve 200 and the adapter shaft 300 ensures the rotation of the motor shaft 10 and the rotor 20.

[0041] When the air gap needs to be adjusted, the motor shaft 10 is fixed to prevent it from rotating, and the adjusting sleeve 200 is rotated to make the adjusting sleeve 200 and the adapter shaft 300 rotate relative to each other. At this time, due to the threaded connection, the adjusting sleeve 200 and the adapter shaft 300 can undergo axial relative displacement, that is, the adapter shaft 300 undergoes axial displacement, thereby realizing axial movement of the motor shaft 10 and the rotor 20, achieving the purpose of changing the distance between the rotor 20 and the stator, and realizing precise adjustment of the air gap.

[0042] The following combination Figure 1-Figure 8 The structure and shape of the air gap adjustment device provided in this embodiment are described in detail:

[0043] In this embodiment, the air gap adjustment device includes an adjustment seat 100, an adjustment sleeve 200, a transfer shaft 300 and a bearing 400. Figure 1 , Figure 3 As shown, the bearing 400 is installed on the adjustment seat 100, the adjustment sleeve 200 is inserted into the inner ring of the bearing 400, and the adapter shaft 300 is inserted into the adjustment sleeve 200 and is threadedly connected with the adjustment sleeve 200; the adjustment seat 100 is screwed to the motor housing, and the adapter shaft 300 is screwed to the motor shaft 10 and is coaxially arranged. When adjusting the air gap, the motor shaft 10 is fixed to prevent it from rotating, and the adjustment sleeve 200 is rotated at the same time. Under the action of the threaded connection, axial thrust and displacement can be generated, thereby driving the motor shaft 10 and the rotor 20 to cause axial displacement.

[0044] In this embodiment, the bearing 400 is configured as a double-row angular contact ball bearing to ensure that the bearing 400 can simultaneously withstand radial force and bidirectional axial thrust, thereby adapting to the axial displacement of the motor shaft 10 and the adapter shaft 300 and avoiding damage. When the motor shaft 10 is installed in the motor housing, a double-row angular contact ball bearing can also be selected, and a deep groove ball bearing can also be selected.

[0045] In an optional solution of this embodiment, the bearing 400 does not have a sealing cover, and an oil inlet and an oil outlet are provided on the adjustment seat 100, and the inner cavity of the adjustment seat 100 is the oil cavity. The circulation pump injects lubricating oil into the inner cavity of the adjustment seat 100 through the oil inlet, and the lubricating oil returns from the oil outlet after passing through the bearing 400 to form a cycle. At this time, the flowing lubricating oil can lubricate and cool the bearing 400 without a sealing cover to ensure the normal operation of the bearing 400. Especially for the high-speed use scenario of the motor, the wear and heat of the various parts of the bearing 400 can be effectively reduced, and the service life of the bearing 400 can be significantly improved.

[0046] In addition, the flow pressure formed by the circulating pump driving the lubricating oil can make the lubricating oil fully enter the bearing 400 to ensure the lubrication of each part of the bearing 400; at the same time, the gap between the parts of the bearing 400 is maintained to avoid direct friction between the parts, thereby increasing the life of the bearing 400 and reducing rotational resistance and heat.

[0047] In an optional solution of this embodiment, the adjustment seat 100 includes a first connecting ring 110, a second connecting ring 120 and a third connecting ring 130. Figure 4As shown, one end of the second connecting ring 120 is connected to the first connecting ring 110, and the other end is connected to the third connecting ring 130. The first connecting ring 110, the second connecting ring 120 and the third connecting ring 130 form an annular groove 101, and the bearing 400 is installed in the annular groove 101. Among them, the end of the first connecting ring 110 away from the second connecting ring 120 is connected to the motor housing, and the third connecting ring 130 can be used to install parts such as encoders or resolver rotors.

[0048] In this embodiment, the first connecting ring 110 and the second connecting ring 120, and the second connecting ring 120 and the third connecting ring 130 are connected by screws, and sealing rings can be provided on the first connecting ring 110 and the third connecting ring 130 to seal the gap between the adapter shaft 300 and the adjustment seat 100 and form a closed inner cavity to facilitate the injection of lubricating oil into the inner cavity. Furthermore, the oil inlet and the oil outlet are respectively provided on both sides of the bearing 400 to ensure the lubrication, cooling and support effects of the bearing 400.

[0049] It should be noted that the third connecting ring 130 serves as a protective cover and a bearing lubricating oil seal and needs to be removed when the air gap is adjusted to facilitate the rotation of the adjustment sleeve 200 .

[0050] In this embodiment, the adjustment sleeve 200 includes a tool section 210, a matching section 220 and a positioning section 230 connected in sequence. Figure 5 As shown. The tool segment 210 is provided with a plurality of tool slots 201 and milling planes 202 arranged around its own axis. The tool slots 201 are used to cooperate with the tool. When the adjustment sleeve 200 is rotated, the tool is inserted into the tool slots 201 to facilitate the rotation of the adjustment sleeve 200. The milling plane 202 can be used to rotate the adjustment sleeve 200 when assembling the adjustment sleeve 200 and the adapter shaft 300. Similarly, the tool segment 210 is also provided with an outer hexagon, which can be used to rotate the adjustment sleeve 200 or cooperate with the tool.

[0051] In this embodiment, the air gap adjustment device also includes a round nut and a round nut stopping washer; one end of the bearing 400 abuts against the adjustment sleeve 200, and the other end is provided with a round nut stopping washer and a round nut, the round nut stopping washer and the round nut are sleeved on the adjustment sleeve 200, and the round nut is threadedly connected to the adjustment sleeve 200.

[0052] Specifically, the mating section 220 is inserted into the inner ring of the bearing 400, that is, the mating section 220 is used to install the bearing 400. At the same time, the mating section 220 and the tool section 210 form a step, and the inner ring of the bearing 400 abuts against the tool section 210 for limiting. The round nut and the round nut stop washer are set on the positioning section 230, and the positioning section 230 is provided with an external thread and a positioning groove 203, wherein the external thread is used to screw with the round nut, and the positioning groove 203 is used to cooperate with the round nut stop washer to prevent the round nut stop washer and the positioning section 230 from rotating relative to each other. That is, the axial limiting of the bearing 400 is completed by the tool section 210 and the round nut, and at this time, the round nut stop washer abuts against the inner ring of the bearing 400. In addition, a backing groove is provided between the positioning section 230 and the mating section 220 to ensure the processing of the external thread.

[0053] In this embodiment, the adapter shaft 300 includes a mounting section 340, a threaded section 310, a transition section 320 and an adapter section 330 which are connected in sequence. Figure 6 As shown. The threaded section 310 is provided with an external thread, and correspondingly, the adjustment sleeve 200 is provided with an internal thread. The threaded section 310 is inserted into the adjustment sleeve 200 and is threadedly connected with the adjustment sleeve 200. The adapter section 330 is inserted into the motor shaft 10 and connected to the motor shaft 10, the transition section 320 is used to connect the threaded section 310 and the adapter section 330, and the installation section 340 is used to connect with an encoder or a resolver rotor, so that the encoder or the resolver rotor obtains rotation data. Similarly, a back-off groove is provided between the transition section 320 and the threaded section 310 to ensure thread processing.

[0054] In this embodiment, a keyway is provided on the transition section 320, such as Figure 6 As shown, it can be used to fix the adapter shaft 300 when the adjusting sleeve 200 is rotated.

[0055] Based on the air gap adjustment device proposed in this embodiment, an axial flux motor is proposed, including the air gap adjustment device. Figure 8 As shown, a blind hole is provided at one end of the motor shaft 10, and the adapter shaft 300 is inserted into the blind hole and screwed to the motor shaft 10; two rotors 20 are screwed to the motor shaft 10, and the stator is arranged between the two rotors 20. The permanent magnet poles on the rotors 20 are arranged alternately, and the magnetic poles of the permanent magnets at relative positions on the two rotors 20 are opposite to each other so as to cooperate with the electromagnetic field generated by the stator to maintain balance, that is, the permanent magnets on the two rotors 20 and the stator windings at corresponding positions on the stator are mutually attracted. At the same time, a bearing is sleeved on one end of the motor shaft 10 away from the adapter shaft 300 to ensure the rotational connection between the motor shaft 10 and the motor housing and the stable rotation of the motor shaft 10.

[0056] When the air gap needs to be adjusted, the motor shaft 10 or the adapter shaft 300 is fixed to prevent it from rotating, and then the adjustment sleeve 200 is rotated to realize the axial movement of the adapter shaft 300, and then the adapter shaft 300 drives the motor shaft 10 and moves the rotor 20, thereby changing the distance between the rotor 20 and the stator, and finally adjusting the two air gaps to be consistent to ensure the stability of the motor.

[0057] The air gap adjustment device provided in this embodiment can realize the precise adjustment of the air gap, ensure that the two air gaps are consistent, and the air gap width can be as low as 1mm; at the same time, it has the advantages of simple structure and convenient operation. However, it is difficult to achieve this effect by ensuring the spacing between the stator and the rotor 20 through processing and assembly accuracy, and it is difficult to eliminate the influence of cumulative errors, which in turn causes the two rotors 20 to be subjected to unbalanced forces. In addition, since the rotor 20 is on both sides of the stator, the stators need to be installed one by one during the assembly process, and there may be a situation where a rotor 20 is attracted to the stator. At this time, the adjustment sleeve 200 can be rotated to separate the attracted rotor 20 and the stator through the thrust of the thread rotation and maintain an accurate gap, thereby ensuring the smooth assembly of the motor.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An air gap adjustment device, characterized in that: It comprises an adjustment seat (100), an adjustment sleeve (200) and a transfer shaft (300); The adjustment seat (100) is installed on the motor housing, and the adapter shaft (300) is connected to the motor shaft (10); The adjustment sleeve (200) is rotatably mounted on the adjustment seat (100), and the adapter shaft (300) is inserted into the adjustment sleeve (200) and threadedly connected to the adjustment sleeve (200).

2. The air gap adjustment device according to claim 1, characterized in that: It also includes a bearing (400), wherein the bearing (400) is mounted on the adjustment seat (100), and the adjustment sleeve (200) is inserted into the bearing (400).

3. The air gap adjustment device according to claim 2, characterized in that: The bearing (400) is configured as a double-row angular contact ball bearing (400).

4. The air gap adjustment device according to claim 2, characterized in that: The bearing (400) is not provided with a sealing cover.

5. The air gap adjustment device according to claim 4, characterized in that: The adjustment seat (100) is provided with an oil inlet and an oil outlet.

6. The air gap adjustment device according to claim 2, characterized in that: The adjustment seat (100) comprises a first connecting ring (110), a second connecting ring (120) and a third connecting ring (130); One end of the second connecting ring (120) is connected to the first connecting ring (110), and the other end is connected to the third connecting ring (130); the first connecting ring (110), the second connecting ring (120) and the third connecting ring (130) form an annular groove (101); and the bearing (400) is installed in the annular groove (101); One end of the first connecting ring (110) facing away from the second connecting ring (120) is connected to the motor housing.

7. The air gap adjustment device according to claim 1, characterized in that: The adapter shaft (300) comprises a threaded section (310), the adjustment sleeve (200) is provided with an internal thread, and the threaded section (310) is inserted into the adjustment sleeve (200) and threadedly connected to the adjustment sleeve (200).

8. The air gap adjustment device according to claim 7, characterized in that: The adjustment sleeve (200) is provided with a plurality of tool slots (201) arranged around its axis.

9. The air gap adjustment device according to claim 2, characterized in that: It also includes a round nut and a round nut stop washer; one end of the bearing (400) abuts against the adjustment sleeve (200), and the other end is provided with a round nut stop washer and a round nut; the round nut stop washer and the round nut are sleeved on the adjustment sleeve (200), and the round nut is threadedly connected to the adjustment sleeve (200).

10. An axial flux motor, characterized in that: It comprises the air gap adjustment device as described in any one of claims 1-9.

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