Motor structure and assembly method thereof

Abstract

The present invention relates to the technical field of motor equipment, and in particular to a motor structure and an assembly method thereof, comprising: performing dynamic balancing tests on a plurality of rotors and a plurality of fan blades, and selecting fan blades corresponding to each rotor; combining a front bearing seat and a stator with a rotor in sequence to form a first component; placing a silicone foot pad in a silicone foot pad groove of a rear bearing seat and placing a wave peak gasket in a rear bearing seat hole of the rear bearing seat to form a second component; combining the first component and the second component and locking spring bolts to form a third component; combining fan blades and a casing corresponding to the rotor in sequence with the third component to form a finished product; the present invention utilizes the above method to effectively eliminate tolerance gaps, reduce motor vibration amplitude, reduce diversion blocking rate, stabilize suction power, and reduce noise generated by the motor, while greatly reducing the impact of bearing misalignment on the motor, further improving the stability of the motor and extending the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motor equipment, and in particular to a motor structure and an assembly method thereof. Background Art

[0002] Motors are commonly used tools in human production and life. Problems may arise when assembling the motor of a household vacuum cleaner. The mating surfaces between the bearing bracket and other parts are plastic surfaces, and the processing accuracy of the plastic surface is relatively low. Therefore, when screwing the screws into the screw foundation piles of the metal inserts, the bearing bracket assembly may have more or less deviations due to uneven force, resulting in misalignment of the bearing, which is a poor alignment during installation. Alternatively, the bearing seat in the plastic protective bracket may expand due to changes in ambient temperature, which will affect the size of the bearing, causing misalignment of the bearing, which is a poor alignment due to thermal expansion. The contact surfaces of the front bearing seat and the rear bearing seat of the vacuum cleaner motor are hard-connected, and there is no buffering material in between. Existing vacuum cleaner motor parts are generally hard-connected with surface-to-surface contact, and the motor parts are required to have high strength and precision, which makes the motor assembly process complicated, not conducive to assembly, and increases assembly costs.

[0003] Chinese Patent Authorization Announcement No.: CN116827055B. A motor structure is disclosed, and the invention relates to the field of motor technology, and in particular to a motor structure. The present invention detects the vibration of the motor bearing in operation by arranging vibration sensors on the bearing bracket and the outer cover of the housing, and the central control processor performs data processing, generates a vibration image according to the information transmitted by the vibration sensor group, and determines whether the bearing has an abnormal alignment according to the vibration image; the central processor makes a fault determination according to the vibration image, marks the peaks in the vibration image, and makes a periodic determination on the peaks in the vibration image to determine whether an abnormal peak appears, and whether the motor shaft has a fault. By marking and periodically determining the peaks in the vibration image, filtering some interference information, the computer can identify the abnormal peaks, and then determine whether the bearing has an abnormality. The determination result is more accurate, precise, and reliable, and can timely detect alignment faults and bearing faults, and provide timely prompts, thereby improving the safety and stability of the motor operation.

[0004] Chinese Patent Authorization Announcement No.: CN220673596U. A motor structure and an electric vehicle are disclosed. The invention provides a motor structure and an electric vehicle, including: a motor housing, which is provided with a receiving cavity, and the receiving cavity is provided with a receiving position; a motor assembly, which is provided in the receiving cavity, and the motor assembly includes a motor stator and a motor rotor, the motor stator is connected to the motor rotor, and the motor stator is provided with a fixing hole; a positioning assembly, including a positioning member and a fixing member, a part of the positioning member is located in the receiving position, and the other part of the positioning member is located in the fixing hole, and the fixing member is passed through the positioning member, so that the motor stator is fixed to the motor housing. The receiving cavity of the motor housing is provided with a receiving position, and the motor stator is provided with a fixing hole corresponding to the receiving position, so that when the motor assembly is assembled in the receiving cavity, the positioning member is respectively located in the receiving position and the fixing hole, and then the connection between the motor stator and the motor housing is realized through the fixing member, which effectively solves the problem of misalignment between the motor stator and the motor housing, and avoids the deviation of the installation position of the motor stator lead wire.

[0005] It can be seen that the above technical solution has the following problems: the vibration sensors are arranged on the bearing bracket and the outer cover of the shell to indirectly detect the bearing vibration, which makes the detection result inaccurate, and fails to solve the vibration problem caused by the operation of the structure. The addition of hard limit devices leads to increased wear of the motor and serious aging of the motor. Summary of the invention

[0006] To this end, the present invention provides a motor structure and an assembly method thereof, so as to overcome the problem in the prior art that a vibration sensor is arranged on the bearing bracket and the outer cover of the shell to indirectly detect the bearing vibration, making the detection result inaccurate, and failing to solve the vibration problem caused by the operation of the structure, and the problem that the addition of a hard limit device causes increased motor wear and serious motor aging.

[0007] In one aspect, the present invention provides a motor assembly method, comprising:

[0008] Step S1, performing dynamic balancing tests on a plurality of rotors and a plurality of fan blades, selecting each of the rotors corresponding to the fan blades to combine and performing the dynamic balancing test on the combination, and determining whether the combination is qualified according to the dynamic balancing test result;

[0009] Step S2, combining the front bearing seat and the stator with the rotor in sequence to form a first assembly;

[0010] Step S3, placing a silicone foot pad in the silicone foot pad groove of the rear bearing seat and placing a wave crest gasket in the rear bearing seat hole of the rear bearing seat to form a second component;

[0011] Step S4, combining the first component and the second component and tightening the spring bolt to form a third component;

[0012] Step S5, combining the blades and the housing corresponding to the rotor with the third component in sequence to form a finished product.

[0013] Furthermore, the step S1 comprises:

[0014] Step S101, using a dynamic balancing tester to sequentially test a plurality of rotors and a plurality of fan blades, recording the rotational offsets of the rotors and the fan blades, and marking the balance points of the rotors and the fan blades according to the rotational offsets;

[0015] Step S102, selecting the fan blade that is consistent with the rotation offset of the rotor;

[0016] The rotation offset is the amplitude of the component deviating from the axial direction during the rotation process; the balance point is the position deviating from the axis marked on the rotor or the fan blade according to the rotation offset.

[0017] Further, in the step S102, the rotor and the selected corresponding blade combination are combined to form a temporary combination, a dynamic balance test is performed on the temporary combination, and the test result is compared with a first set value. If the test result is not greater than the first set value, the temporary combination is determined to be qualified;

[0018] If the detection result is greater than the first set value, comparing the detection result with a second set value;

[0019] Among them, the first set value is positively correlated with the outer diameter of the rotor and the outer diameter of the fan blade respectively; the second set value is positively correlated with the outer diameter of the rotor and the outer diameter of the fan blade respectively.

[0020] Further, in the step S102, the detection result is compared with the second set value, and if the detection result is not greater than the second set value, a balancing block is added to the fan blade;

[0021] If the detection result is greater than the second set value, reselecting the fan blades for combination;

[0022] The balancing block is a counterweight added to eliminate rotational imbalance.

[0023] Further, in step S5, the balance point of the blade corresponding to the rotor and the balance point of the rotor in the third component are combined in a state where they are symmetrically arranged on both sides of the axis and in the same plane as the axis;

[0024] In the temporary combination, the balance points of the rotor and the corresponding blades are arranged on both sides of the axis and are in the same plane as the axis;

[0025] The axis is the geometric center line around which the rotor rotates.

[0026] On the other hand, the present invention provides a motor structure, wherein a booster vane is arranged in a front bearing seat of the motor.

[0027] Furthermore, a guide vane is arranged on the inner side of the shell, and the arc shape and number of the guide vane are the same as those of the booster blades.

[0028] Furthermore, a silicone foot pad groove is provided on the rear bearing seat, and the silicone foot pad is arranged in the silicone foot pad groove.

[0029] Furthermore, a rear bearing seat hole is arranged on the rear bearing seat, and the crest gasket is arranged in the rear bearing seat hole.

[0030] Furthermore, the connection between the front bearing seat and the rear bearing seat is locked using a spring bolt.

[0031] Compared with the prior art, the beneficial effect of the present invention is that, by setting up dynamic balancing detection, the unstable factors that cause dynamic balancing are effectively eliminated during the motor assembly stage, while the stability of the motor is effectively improved and the service life of the motor is extended.

[0032] Furthermore, by providing a soft connection structure in the motor, the tolerance gap is effectively eliminated, the vibration amplitude of the motor is reduced, and the noise generated by the motor is reduced. While greatly reducing the impact of bearing misalignment on the motor, the stability of the motor is further improved and the service life of the motor is extended.

[0033] Furthermore, by providing boost blades and guide vanes, the flow guide blockage rate is reduced and the suction power is stabilized, which effectively reduces power consumption while further improving the stability of the motor and extending the service life of the motor.

[0034] Furthermore, by providing spring bolts and sub-assemblies, the precision between the various parts of the motor is reduced, which facilitates the assembly of the motor and further improves the stability of the motor and extends the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A flow chart of a motor assembly method of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of a motor according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic structural diagram of a rotor and blade combination according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic structural diagram of the inner side of the front bearing seat according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the inner side of the housing of an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the silicone foot pad groove and the rear bearing seat hole in an embodiment of the present invention;

[0041] Among them: 1, outer shell; 11, guide vane; 12, air inlet; 2, fan blade; 3, front bearing seat; 31, front bearing hole; 32, boost blade; 4, rotor; 5, stator; 6, rear bearing seat; 61, silicone foot pad; 62, crest gasket; 63, spring bolt; 64, silicone foot pad groove; 65, rear bearing seat hole; 7, axis; 8, fan blade balance point; 9, rotor balance point. DETAILED DESCRIPTION

[0042] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0044] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0045] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] See also Figure 1 As shown, it is a flow chart of a motor assembly method of the present invention. On the one hand, the present invention provides a motor assembly method, comprising:

[0047] Step S1, performing dynamic balancing tests on a plurality of rotors and a plurality of blades, selecting blades corresponding to each rotor to form a combination and performing dynamic balancing tests on the combination, and determining whether the combination is qualified according to the dynamic balancing test results;

[0048] Step S2, combining the front bearing seat and the stator with the rotor in sequence to form a first assembly;

[0049] Step S3, placing a silicone foot pad in the silicone foot pad groove of the rear bearing seat and placing a wave crest gasket in the rear bearing seat hole of the rear bearing seat to form a second component;

[0050] Step S4, combining the first component and the second component and tightening the spring bolt to form a third component;

[0051] Step S5, combining the blades and the housing corresponding to the rotor with the third component in sequence to form a finished product.

[0052] Specifically, step S1 includes:

[0053] Step S101, using a dynamic balancing tester to sequentially test a plurality of rotors and a plurality of fan blades, recording the rotational offset of the rotors and the fan blades, and marking the balance point of each rotor and each fan blade according to the rotational offset;

[0054] Step S102, selecting a blade that is consistent with the rotation offset of the rotor;

[0055] Example 1, please refer to Figure 3 As shown, it is a schematic structural diagram of the rotor and blade combination of an embodiment of the present invention; wherein the geometric center of the blade 2 is aligned with the geometric center of the rotor 4 along the axis 7; the blade balance point 8 and the rotor balance point 9 are symmetrically arranged on both sides of the axis 7 and are in the same plane with the axis 7;

[0056] In this embodiment, a dynamic balancing tester is used to detect that the rotational offset of the rotor 4 is 3 microns and a rotor balance point 9 is marked on the rotor 4. A blade 2 whose rotational offset is also 3 microns and whose blade balance point 8 has been marked is selected, and the geometric center of the rotor 4 is aligned with the geometric center of the blade 2 along the axis 7 to form a temporary combination.

[0057] The rotation offset is the amplitude of the component deviating from the axial direction during the rotation process; the balance point is the position deviating from the axis marked on the rotor or blade according to the rotation offset.

[0058] Specifically, by setting up dynamic balancing detection, the unstable factors that cause dynamic balance can be effectively eliminated during the motor assembly stage, while effectively improving the stability of the motor and extending the service life of the motor.

[0059] Specifically, in step S102, the rotor and the selected corresponding fan blade combination form a temporary combination, a dynamic balance test is performed on the temporary combination, and the test result is compared with the first set value. If the test result is not greater than the first set value, the temporary combination is determined to be qualified;

[0060] If the detection result is greater than the first set value, the detection result is compared with the second set value;

[0061] Embodiment 2: Based on Embodiment 1, this embodiment is different from the embodiment 1 in that the first setting value is 3 microns, the second setting value is 5 microns, and a dynamic balance test is performed on the temporary assembly. If the test result is 2 microns, which is less than the first setting value of 3 microns, the temporary assembly is determined to be qualified;

[0062] If the detection result of 4 microns is greater than the first set value of 3 microns, the detection result of 4 microns is compared with the second set value.

[0063] Among them, the first set value is positively correlated with the outer diameters of the rotor and the fan blades respectively; the second set value is positively correlated with the outer diameters of the rotor and the fan blades respectively.

[0064] It is understandable that, since the rotor drives the fan blades to rotate, the outer diameter of the rotor and the outer diameter of the fan blades increase or decrease at the same time considering economic and power factors.

[0065] Optionally, the outer diameter of the fan blade is 10 cm and the outer diameter of the rotor is 3 cm.

[0066] In one embodiment, the outer diameter of the rotor is 1 cm, the outer diameter of the fan blade is 5 cm, the first setting value is 1 micron, and the second setting value is 3 microns;

[0067] The outer diameter of the rotor is 2 cm, the outer diameter of the fan blade is 8 cm, the first setting value is 2 microns, and the second setting value is 4 microns;

[0068] The outer diameter of the rotor is 3 cm, the outer diameter of the fan blade is 10 cm, the first setting value is 3 microns, and the second setting value is 5 microns.

[0069] Specifically, in step S102, the detection result is compared with the second set value, and if the detection result is not greater than the second set value, a balancing block is added to the fan blade;

[0070] If the detection result is greater than the second set value, the fan blades are reselected for combination;

[0071] Among them, the balance block is a counterweight added to eliminate rotational imbalance.

[0072] Embodiment 3: Based on Embodiment 2, this embodiment is different from it in that the first setting value is 3 microns, the second setting value is 5 microns, and if the detection result is 4 microns which is less than the second setting value of 5 microns, a balancing block is added to the fan blade;

[0073] If the detection result is 6 microns which is greater than the second set value of 5 microns, the fan blades are reselected for combination.

[0074] Specifically, in step S5, the balance point of the blade corresponding to the rotor and the balance point of the rotor in the third component are combined in a state where they are symmetrically arranged on both sides of the axis and in the same plane as the axis;

[0075] In the temporary combination, the balance points of the rotor and the corresponding blades are arranged on both sides of the axis and are in the same plane as the axis;

[0076] The axis is the geometric centerline around which the rotor rotates.

[0077] In another aspect, the present invention provides a motor structure, see Figure 2 As shown, it is a structural schematic diagram of a motor according to an embodiment of the present invention; wherein, the fan blade 2 is connected to the fan housing 1; the front bearing seat 3 is connected to the fan blade 2; the rotor 4 is connected to the front bearing seat 3; the stator 5 is connected to the rotor 4; the rear bearing seat 6 is connected to the stator 5; the silicone foot pad 61 is respectively connected to the front bearing seat 3 and the rear bearing seat 6; the crest gasket 62 is respectively connected to the stator 5 and the rear bearing seat 6; the spring bolt 63 is respectively connected to the front bearing seat 3 and the rear bearing seat 6.

[0078] Specifically, a boost blade is arranged in the front bearing seat of the motor.

[0079] See also Figure 4 As shown, it is a schematic structural diagram of the rotor and blade combination of an embodiment of the present invention; wherein, the front bearing hole 31 is arranged on the front bearing seat 3; and the boost blade 32 is arranged on the front bearing seat 3.

[0080] Specifically, a guide vane is arranged on the inner side of the outer shell, and the arc shape and number of the guide vane are the same as those of the boost blade.

[0081] See also Figure 5 As shown, it is a schematic diagram of the structure of the inner side of the shell of an embodiment of the present invention; wherein, the guide plate 11 is arranged on the inner side of the shell 1; and the air inlet 12 is arranged on the shell 1.

[0082] Specifically, by providing boost blades and guide vanes, the diversion blockage rate is reduced and the suction power is stabilized. While effectively reducing power consumption, the stability of the motor is further improved and the service life of the motor is extended.

[0083] Specifically, a silicone foot pad groove is arranged on the rear bearing seat, and the silicone foot pad is arranged in the silicone foot pad groove.

[0084] Please cooperate Figure 1 See also Figure 6As shown, it is a schematic diagram of the structure of the silicone foot pad groove and the rear bearing seat hole in an embodiment of the present invention; wherein, the silicone foot pad groove 64 is arranged on the rear bearing seat 6; and the silicone foot pad 61 is arranged in the silicone foot pad groove 64.

[0085] Specifically, a rear bearing seat hole is arranged on the rear bearing seat, and the crest gasket is arranged in the rear bearing seat hole.

[0086] Please cooperate Figure 1 See also Figure 6 As shown, the rear bearing seat hole 65 is arranged on the rear bearing seat, and the crest gasket 62 is arranged in the rear bearing seat hole 65.

[0087] Specifically, by setting a soft connection structure in the motor, the tolerance gap is effectively eliminated, the vibration amplitude of the motor is reduced, and the noise generated by the motor is reduced. While greatly reducing the impact of bearing misalignment on the motor, the stability of the motor is further improved and the service life of the motor is extended.

[0088] Specifically, the connection between the front bearing seat and the rear bearing seat is locked using a spring bolt.

[0089] Please continue reading Figure 1 As shown, the connection between the front bearing seat 3 and the rear bearing seat 6 is locked using a spring bolt 63.

[0090] Specifically, by providing spring bolts and sub-assemblies, the precision between the various parts of the motor is reduced, which facilitates the assembly of the motor and further improves the stability of the motor and extends the service life of the motor.

[0091] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor assembly method, characterized in that: include: Step S1, performing dynamic balancing tests on a plurality of rotors and a plurality of fan blades, selecting each of the rotors corresponding to the fan blades to combine and performing the dynamic balancing test on the combination, and determining whether the combination is qualified according to the dynamic balancing test result; Step S2, combining the front bearing seat and the stator with the rotor in sequence to form a first assembly; Step S3, placing a silicone foot pad in the silicone foot pad groove of the rear bearing seat and placing a wave crest gasket in the rear bearing seat hole of the rear bearing seat to form a second component; Step S4, combining the first component and the second component and tightening the spring bolt to form a third component; Step S5, combining the blades and the housing corresponding to the rotor with the third component in sequence to form a finished product; The step S1 comprises: Step S101, using a dynamic balancing tester to sequentially test a plurality of rotors and a plurality of fan blades, recording the rotational offsets of the rotors and the fan blades, and marking the balance points of the rotors and the fan blades according to the rotational offsets; Step S102, selecting the fan blade that is consistent with the rotation offset of the rotor; The rotation offset is the amplitude of the component deviating from the axial direction during the rotation process; the balance point is the position deviating from the axis marked on the rotor or the fan blade according to the rotation offset; In step S102, the rotor and the selected corresponding blade combination form a temporary combination, a dynamic balance test is performed on the temporary combination, and the test result is compared with a first set value. If the test result is not greater than the first set value, the temporary combination is determined to be qualified; If the detection result is greater than the first set value, comparing the detection result with a second set value; Wherein, the first setting value is positively correlated with the outer diameter of the rotor and the outer diameter of the fan blade respectively; the second setting value is positively correlated with the outer diameter of the rotor and the outer diameter of the fan blade respectively; In the step S102, the detection result is compared with the second set value, and if the detection result is not greater than the second set value, a balancing block is added to the fan blade; If the detection result is greater than the second set value, reselecting the fan blades for combination; The balancing block is a counterweight added to eliminate rotational imbalance.

2. The motor assembly method according to claim 1, characterized in that: In the step S5, the balance point of the blade corresponding to the rotor and the balance point of the rotor in the third component are combined in a state where they are symmetrically arranged on both sides of the axis and are in the same plane as the axis; In the temporary combination, the balance points of the rotor and the corresponding blades are arranged on both sides of the axis and are in the same plane as the axis; The axis is the geometric center line around which the rotor rotates.

3. A motor structure using the motor assembly method according to any one of claims 1 to 2, characterized in that: A booster blade is arranged in the front bearing seat of the motor.

4. The motor structure according to claim 3, characterized in that: A guide vane is arranged on the inner side of the shell, and the arc shape and number of the guide vane are the same as those of the boost blade.

5. The motor structure according to claim 4, characterized in that: A silicone foot pad groove is arranged on the rear bearing seat, and the silicone foot pad is arranged in the silicone foot pad groove.

6. The motor structure according to claim 5, characterized in that: A rear bearing seat hole is arranged on the rear bearing seat, and a wave crest gasket is arranged in the rear bearing seat hole.

7. The motor structure according to claim 6, characterized in that: The connection between the front bearing seat and the rear bearing seat is locked using a spring bolt.

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