Driving mechanism and air conditioner

Abstract

The utility model discloses a driving mechanism and air conditioner, driving mechanism includes output shaft, bearing and insulating subassembly. The baffle ring is sleeved on the output shaft. The inner ring of bearing is sleeved on the output shaft, and is limited with the baffle ring in the axial direction of output shaft. Insulating subassembly includes insulating sleeve and insulating washer, and the insulating sleeve is annularly arranged on the outer circumferential side of output shaft and is located between the output shaft and the inner ring of bearing. The insulating washer is sleeved on the output shaft and is clamped between the inner ring of bearing and the baffle ring. Thus, when the motor is running, the current through the contact part of the inner and outer ring channel surface of bearing and steel ball can be avoided, and the electrical independence of bearing single product is protected, the electric corrosion of bearing is prevented, and the abnormal noise of motor operation is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a drive mechanism and an air conditioner. Background Technology

[0002] An air conditioner, or air conditioner, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow within a building or structure. Market research revealed that a certain model of air conditioner developed abnormal motor noise after a period of use, severely impacting the user experience. Disassembly of the motor revealed electrolytic corrosion on the bearings of the motor shaft. This corrosion damaged the rolling friction surfaces of the bearings, causing damage to the originally smooth surface and leading to abnormal vibration and noise. Utility Model Content

[0003] The main purpose of this utility model is to propose a drive mechanism and an air conditioner, which aims to solve the problem of abnormal noise in motors caused by electro-corrosion of the bearings.

[0004] To achieve the above objectives, this utility model proposes a driving mechanism, comprising:

[0005] The output shaft is fitted with a retaining ring.

[0006] A bearing, the inner ring of which is fitted onto the output shaft and engages with the retaining ring at the upper axial position of the output shaft; and,

[0007] An insulating assembly includes an insulating bushing and an insulating washer. The insulating bushing is disposed around the outer periphery of the output shaft and located between the output shaft and the inner ring of the bearing. The insulating washer is sleeved on the output shaft and sandwiched between the inner ring of the bearing and the retaining ring.

[0008] Optionally, the output shaft is provided with a mounting groove around its outer periphery;

[0009] The insulating bushing is housed within the mounting groove, and its two end faces along the axial direction of the output shaft are in contact with the two side walls of the mounting groove.

[0010] Optionally, in the axial direction of the output shaft, the groove wall of the mounting groove extends beyond the end face of the bearing at least on the side opposite to the retaining ring, and correspondingly, the end face of the insulating bushing extends beyond the end face of the bearing at least on the side opposite to the retaining ring.

[0011] Optionally, in the axial direction of the output shaft, both sides of the mounting groove extend beyond the two end faces of the bearing.

[0012] On the side near the retaining ring, the insulating bushing partially overlaps with the insulating washer.

[0013] Optionally, the distance by which the wall of the mounting groove extends beyond the end face of the bearing is set to 0.9 mm to 1.1 mm.

[0014] Optionally, the outer wall of the insulating bushing is flush with the opening of the mounting groove.

[0015] Optionally, the insulating bushing is injection molded integrally within the mounting groove; and / or,

[0016] The insulating bushing is made of insulating glass fiber resin.

[0017] Optionally, the thickness of the insulating washer is set to 1.9 mm to 2.1 mm along the axial direction of the output shaft.

[0018] Optionally, in the radial direction of the output shaft, the height of the insulating washer does not exceed the height of the inner ring of the bearing.

[0019] This utility model also proposes an air conditioner, including the aforementioned drive mechanism.

[0020] The technical solution provided by this utility model has at least the following advantages:

[0021] The drive mechanism provided by this utility model includes an output shaft, a bearing, and an insulating assembly. The inner ring of the bearing is fitted onto the output shaft, and a retaining ring is also provided on the output shaft to limit the bearing's axial movement. Furthermore, by providing an insulating sleeve between the output shaft and the inner ring of the bearing, and by sandwiching an insulating washer between the inner ring of the bearing and the retaining ring, current is prevented from flowing through the contact area between the bearing's inner and outer ring raceways and the steel balls during motor operation. This protects the electrical independence of the bearing, prevents electro-corrosion, and eliminates abnormal noise during motor operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of an embodiment of a drive mechanism provided by this utility model;

[0024] Figure 2 for Figure 1 An enlarged schematic diagram of part A of the drive mechanism.

[0025] Explanation of icon numbers:

[0026] 100 Drive mechanism; 1 Output shaft; 11 Mounting slot; 2 Retaining ring; 3 Bearing; 31 Inner ring; 4 Insulating assembly; 41 Insulating bushing; 42 Insulating washer.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] An air conditioner, or air conditioner, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow within a building or structure. Market research revealed that a certain model of air conditioner developed abnormal motor noise and malfunctions after a period of use, severely impacting the user experience.

[0032] To solve the problem of abnormal noise from the motor, this utility model improves the drive mechanism 100 of the air conditioner. The drive mechanism 100 will be described in detail below with reference to the accompanying drawings.

[0033] This utility model provides a drive mechanism 100, which can be configured as a motor of various types. The motor typically has an output shaft 1 for driving connection with an external load. To achieve efficient and stable operation of the motor, a bearing 3 is usually provided as a support component. At the same time, a retaining ring 2 is provided on the output shaft 1 to limit the bearing 3 in the axial direction of the output shaft 1.

[0034] The motor experienced abnormal noises during operation. Upon disassembly, electrical corrosion was found in bearing 3. Technical personnel analyzed the issue and discovered that current was flowing through the contact area between the inner and outer raceways of bearing 3 and the steel balls. The resulting electrical sparks punctured the lubricating oil film, causing instantaneous high temperatures and localized melting at the steel ball contact points, thus resulting in the abnormal noises during motor operation.

[0035] In this utility model, please refer to Figure 1 The drive mechanism 100 also includes an insulation component 4, which includes an insulating bushing 41 and an insulating washer 42. The insulating bushing 41 is arranged around the outer periphery of the output shaft 1 and is located between the output shaft 1 and the inner ring 31 of the bearing 3. The insulating washer 42 is sleeved on the output shaft 1 and is sandwiched between the inner ring 31 of the bearing 3 and the retaining ring 2.

[0036] In this utility model, by setting an insulating bushing 41 between the output shaft 1 and the inner ring 31 of the bearing 3, and by clamping an insulating washer 42 between the inner ring 31 of the bearing 3 and the retaining ring 2, current is prevented from passing through the contact area between the inner and outer ring groove surfaces of the bearing 3 and the steel ball when the motor is running. This protects the electrical independence of the bearing 3, prevents electro-corrosion of the bearing 3, and eliminates abnormal noise during motor operation.

[0037] This invention does not impose specific limitations on the installation method of the insulating bushing 41. In one embodiment, the insulating bushing 41 can be directly fitted onto the outer wall of the output shaft 1.

[0038] In one embodiment, please refer to Figure 1 and Figure 2 An installation groove 11 is provided around the outer periphery of the output shaft 1. An insulating bushing 41 is housed in the installation groove 11, and its two end faces on both sides along the axial direction of the output shaft 1 are in contact with the two side walls of the installation groove 11.

[0039] The insulating bushing 41 is housed in the mounting groove 11 on the outer periphery of the output shaft 1, and its two end faces are in contact with the two side walls of the mounting groove 11. This effectively prevents current from being transmitted through the gap between the output shaft 1 and other components, thereby improving the insulation performance.

[0040] Meanwhile, the circumferential mounting groove 11 provides a precise mounting position for the insulating bushing 41, allowing it to be accurately installed on the output shaft 1, which improves assembly accuracy and consistency. The two side walls of the mounting groove 11 are in contact with the two end faces of the insulating bushing 41, providing axial positioning and preventing displacement of the insulating bushing 41 along the output shaft 1. This helps ensure that the insulating bushing 41 is always in the correct position, continuously performing its insulation and other functions, while also maintaining the structural stability of the entire output shaft 1 system.

[0041] Furthermore, the insulating bushing 41 is housed in the mounting groove 11, which can reduce the distance between the outer ring of the bearing 3 and the central axis of the output shaft 1, and reduce the radial dimension of the outer ring of the bearing 3.

[0042] It is understandable that when the motor is running, the output shaft 1 will undergo axial thermal expansion and contraction due to temperature rise (such as heat generated by copper losses and iron losses), and the bearing 3 itself has a small axial clearance during rotation. At this time, the bearing 3 is very likely to form a conductive connection with the output shaft 1 after displacement.

[0043] To address this issue, in one embodiment, please refer to Figure 2 In the axial direction of the output shaft 1, the groove wall of the mounting groove 11 extends beyond the end face of the bearing 3 at least on the side away from the retaining ring 2, and correspondingly, the end face of the insulating bushing 41 extends beyond the end face of the bearing 3 at least on the side away from the retaining ring 2.

[0044] Because a retaining ring 2 is provided on one side of bearing 3, it will limit the bearing 3 axially on the output shaft 1. Therefore, during motor operation, bearing 3 will most likely move away from the side away from retaining ring 2. By ensuring that the end face of the insulating bushing 41 extends beyond the end face of bearing 3 at least on the side away from retaining ring 2, even if bearing 3 shifts, it will not form a conductive connection with the output shaft 1.

[0045] In some cases, even with the retaining ring 2 installed, the bearing 3 will still shift towards one side of the retaining ring 2. In this case, on the side closer to the retaining ring 2, the inner ring 31 of the bearing 3 partially extends beyond the insulating bushing 41 and forms a conductive connection with the output shaft 1.

[0046] To prevent this from happening, in one embodiment, please refer to... Figure 2 In the axial direction of the output shaft 1, the two side walls of the mounting groove 11 extend beyond the two side end faces of the bearing 3. Thus, no matter which side the bearing 3 moves to in the axial direction of the output shaft 1, the inner ring 31 of the bearing 3 will still contact the insulating bushing 41, and will not form a conductive connection with the output shaft 1.

[0047] Meanwhile, near the retaining ring 2, the insulating bushing 41 and the insulating washer 42 partially overlap. Both the insulating bushing 41 and the insulating washer 42 are designed to prevent current from being transmitted through the gap between the output shaft 1 and other components, while the partial overlap increases the insulation coverage area and reliability, thereby enhancing the insulation effect of the insulating assembly 4.

[0048] As mentioned above, during motor operation, the axial thermal expansion and contraction of the output shaft 1 and the clearance of the bearing 3 will cause the inner ring 31 of the bearing 3 to contact the output shaft 1, thus creating a conductive connection. If the distance H between the mounting groove 11 wall and the end face of the bearing 3 is too small, for example, less than 0.9 mm, the amount of thermal expansion or the clearance of the bearing 3 may exceed the reserved space. In this case, the inner ring 31 of the bearing 3 still risks contacting the output shaft 1. If the distance H is too large, for example, greater than 1.1 mm, the reserved space exceeds the sum of thermal expansion and clearance, resulting in an ineffective clearance. Under axial force, the bearing 3 is prone to movement.

[0049] The distance H of the groove wall of the mounting groove 11 extending beyond the end face of the bearing 3 is set to 0.9mm to 1.1mm, which is exactly matched with the sum of the thermal expansion of the shaft of most small and medium-sized motors and the axial clearance of conventional deep groove ball bearings 3. This provides sufficient compensation for thermal expansion and the clearance of bearing 3, while avoiding the risk of movement caused by excessive clearance.

[0050] Preferably, the distance H from the groove wall of the mounting groove 11 to the end face of the bearing 3 is set to 1 mm.

[0051] Continuing from the above, an installation groove 11 is provided around the outer periphery of the output shaft 1. An insulating bushing 41 is accommodated within the installation groove 11. To avoid a conductive connection between the bearing 3 and the output shaft 1, and to meet the radial dimension requirements of the outer ring of the bearing 3, in one embodiment, the outer wall of the insulating bushing 41 is flush with the opening of the installation groove 11.

[0052] In other words, the outer wall of the insulating bushing 41 forms a continuous and smooth surface with the outer wall of the output shaft 1. The inner ring 31 of the bearing 3 is fitted around the insulating bushing 41. Since the two side walls of the mounting groove 11 extend beyond the two side end faces of the bearing 3 in the axial direction of the output shaft 1, when the insulating washer 42 is fitted on the output shaft 1, the insulating washer 42 partially overlaps with the insulating bushing 41.

[0053] This invention does not impose specific limitations on the arrangement of the insulating bushing 41. The insulating bushing 41 can be a separate component, assembled onto the output shaft 1. Alternatively, the insulating bushing 41 can be integrally formed onto the output shaft 1.

[0054] In one embodiment, the insulating bushing 41 is integrally injection molded into the mounting groove 11. Integral injection molding involves directly injecting molten insulating material into the mounting groove 11. After the material cools, it forms a gapless fit with the groove wall of the mounting groove 11, thus eliminating both radial fit gaps and axial assembly misalignment.

[0055] In this structure, the insulating bushing 41 forms a rigid connection with the output shaft 1. Even if the motor experiences long-term high-frequency vibration or is subjected to axial force, the insulating bushing 41 will not loosen or shift. At the same time, the gapless fit blocks the path of current conduction through the gap between the bushing and the slot wall, enhancing the insulation effect of the insulating component 4.

[0056] In one embodiment, the insulating bushing 41 is made of insulating glass fiber resin. Preferably, the insulating bushing 41 is made of glass fiber reinforced polyphenylene sulfide (PPS). PPS is a composite material modified by adding glass fibers to a pure PPS resin matrix. PPS not only exhibits high temperature resistance, low expansion, and outstanding thermal stability, but also provides stable insulation and excellent high-frequency characteristics.

[0057] It should be noted that the above two technical features can be selected as one or both. Specifically, in one embodiment, the above two technical features are provided simultaneously. That is, the insulating bushing 41 can be injection molded in the mounting groove 11 using insulating glass fiber resin.

[0058] In one embodiment, the depth D of the mounting groove 11 is set to 1.9 mm to 2.1 mm.

[0059] In one embodiment, the thickness T of the insulating washer 42 is set to 1.9 mm to 2.1 mm along the axial direction of the output shaft 1. Preferably, the thickness T of the insulating washer 42 is set to 2 mm.

[0060] It is understood that the outer ring of bearing 3 is typically fixed within bearing housing 3 (or rigidly connected to the housing). If the insulating washer 42 protrudes radially from the inner ring 31, it will rub against the stationary outer ring or bearing housing 3 during rotation, resulting in abnormal noise or washer wear. In one embodiment, the height of the insulating washer 42 in the radial direction of the output shaft 1 does not exceed the height of the inner ring 31 of bearing 3. This ensures that the insulating washer 42 is completely within the rotational area of ​​the inner ring 31, avoiding rotational interference between the insulating washer 42 and the outer ring of bearing 3 or bearing housing 3.

[0061] This utility model also provides an air conditioner, which includes a drive mechanism 100. It should be noted that the drive mechanism 100 is configured as described above, which means it includes all the technical features of the drive mechanism 100. Therefore, the air conditioner also includes all the technical features of the drive mechanism 100, and thus has the technical effects brought about by all the technical features described above.

[0062] By setting an insulating bushing 41 between the output shaft 1 and the inner ring 31 of the bearing 3, and clamping an insulating washer 42 between the inner ring 31 of the bearing 3 and the retaining ring 2, current is prevented from flowing through the contact area between the inner and outer ring groove surfaces of the bearing 3 and the steel ball when the motor is running. This protects the electrical independence of the bearing 3, prevents electro-corrosion of the bearing 3, and eliminates abnormal noises during motor operation.

[0063] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A driving mechanism, characterized in that, include: The output shaft is fitted with a retaining ring. The bearing has its inner ring fitted onto the output shaft and is engaged with the retaining ring at the upper axial position of the output shaft. as well as, An insulating assembly includes an insulating bushing and an insulating washer. The insulating bushing is disposed around the outer periphery of the output shaft and located between the output shaft and the inner ring of the bearing. The insulating washer is sleeved on the output shaft and sandwiched between the inner ring of the bearing and the retaining ring.

2. The driving mechanism according to claim 1, characterized in that, The output shaft is provided with a mounting groove around its outer periphery; The insulating bushing is housed within the mounting groove, and its two end faces along the axial direction of the output shaft are in contact with the two side walls of the mounting groove.

3. The driving mechanism according to claim 2, characterized in that, In the axial direction of the output shaft, the groove wall of the mounting groove extends beyond the end face of the bearing at least on the side away from the retaining ring, and correspondingly, the end face of the insulating bushing extends beyond the end face of the bearing at least on the side away from the retaining ring.

4. The driving mechanism according to claim 3, characterized in that, Along the axial direction of the output shaft, both sides of the mounting groove extend beyond the two end faces of the bearing. On the side near the retaining ring, the insulating bushing partially overlaps with the insulating washer.

5. The driving mechanism according to claim 3, characterized in that, The distance by which the wall of the mounting groove extends beyond the end face of the bearing is set to 0.9mm to 1.1mm.

6. The driving mechanism according to claim 2, characterized in that, The outer wall of the insulating bushing is flush with the opening of the mounting groove.

7. The driving mechanism according to claim 2, characterized in that, The insulating bushing is integrally injection molded into the mounting groove; and / or The insulating bushing is made of insulating glass fiber resin.

8. The driving mechanism according to claim 1, characterized in that, Along the axial direction of the output shaft, the thickness of the insulating washer is set to 1.9mm to 2.1mm.

9. The driving mechanism according to claim 1, characterized in that, In the radial direction of the output shaft, the height of the insulating washer does not exceed the height of the inner ring of the bearing.

10. An air conditioner, characterized in that, Includes the drive mechanism as described in any one of claims 1-9.

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