Motor and refrigeration equipment

Abstract

The utility model discloses a motor and refrigeration equipment, and relates to the technical field of motors, the motor comprises a motor main body, an end cover, a bearing seat and a plastic sliding bearing; one end of the motor main body is opened; the end cover covers an opening of the motor main body, and the motor main body and the end cover are provided with bearing seat mounting parts along a middle shaft of the motor; the bearing seat is arranged on the bearing seat mounting parts, the bearing seat is provided with a bearing chamber, the plastic sliding bearings are arranged in the bearing chamber, the plastic sliding bearings on the two bearing seat mounting parts are coaxially distributed, and a rotating shaft of the motor is rotatably arranged on the plastic sliding bearings in a penetrating manner. According to the technical scheme, the plastic sliding bearing is adopted, the noise problem caused by fretting wear and electrocorrosion is avoided, and the use experience of a user is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor and a refrigeration device. Background Art

[0002] Existing motors usually use rolling bearings, which are prone to micro-wear and electrical corrosion. During the use of the motor, the micro-wear and electrical corrosion of the rolling bearings may cause the motor to have bad noise problems, thereby affecting the user experience. Utility Model Content

[0003] The main purpose of the utility model is to propose a motor and a refrigeration device, aiming to adopt plastic sliding bearings to avoid noise problems caused by micro-motion wear and electrical corrosion, and to ensure the user's experience.

[0004] To achieve the above-mentioned purpose, the motor proposed by the utility model comprises:

[0005] A motor body, one end of which is open;

[0006] An end cover is arranged at the opening of the motor body, and the end cover and the motor body are both provided with a bearing seat mounting portion along the central axis of the motor;

[0007] A bearing seat, disposed on the bearing seat mounting portion, wherein the bearing seat is provided with a bearing chamber; and

[0008] A plastic sliding bearing is arranged in the bearing chamber, the plastic sliding bearings on the two bearing seat mounting parts are coaxially distributed, and the rotating shaft of the motor is rotatably penetrated by the plastic sliding bearing.

[0009] In one embodiment, the bearing seat mounting portion is formed with a mounting cavity, the bearing chamber is located in the mounting cavity, and the mounting cavity of the motor body and the mounting cavity of the end cover are arranged opposite to each other.

[0010] In one embodiment, the bearing chamber is provided with a limiting side wall, the limiting side wall extends in a concave arc shape in the axial direction of the motor, and the outer periphery of the plastic sliding bearing is adapted to abut against the limiting side wall.

[0011] In one embodiment, the bearing seat is further provided with a buckle, and the bearing seat mounting portion is provided with a locking protrusion, the locking protrusion is arranged closer to the outer periphery of the motor than the mounting cavity, and the locking protrusion is locked with the buckle.

[0012] In one embodiment, the bearing chamber and the buckle are arranged at both ends of the bearing seat along the axial direction of the motor, the bearing seat mounting portion is provided with an avoidance hole, the buckle ring is arranged around the avoidance hole, the buckle ring is provided with a buckle groove, the buckle is provided with a first guide bevel on the side facing the mounting cavity, and the buckle is provided with a second guide bevel at the end away from the bearing chamber, and the first guide bevel and the second guide bevel are used to guide the buckle to be engaged with the buckle groove.

[0013] In one embodiment, a groove side wall of the buckle groove adjacent to the bearing chamber is provided with an avoidance slope, and the avoidance slope abuts against the first guide slope.

[0014] In one embodiment, the bearing seat is made of an elastic material.

[0015] In one embodiment, the rotating shaft and the plastic sliding bearing are clearance-fitted.

[0016] In one embodiment, the gap between the rotating shaft and the plastic sliding bearing is less than 0.03 mm.

[0017] The utility model also provides a refrigeration device, which includes the motor as described above.

[0018] The technical solution of the utility model is to arrange a bearing seat mounting portion on opposite sides of the end cover and the motor body, arrange a bearing seat on the bearing seat mounting portion, and install a plastic sliding bearing in a bearing chamber in the bearing seat, wherein the rotating shaft of the motor is rotatably penetrated in the plastic sliding bearing. Since the plastic sliding bearing is made of plastic material, the inside and the rotating shaft are in line contact, and it has good insulation. In this way, during the use of the motor, the degree of micro-motion wear of the plastic sliding bearing due to micro-motion is low, and at the same time, no potential difference is accumulated between the inner ring and the outer ring of the plastic sliding bearing, thereby reducing the possibility of abnormal noise in the motor due to bearing problems, thereby ensuring the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A cross-sectional schematic diagram of an embodiment of a motor provided by the utility model;

[0021] Figure 2 for Figure 1A partial enlarged view of the middle A;

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of the motor body;

[0023] Figure 4 for Figure 1 A schematic cross-sectional view of the middle end cover;

[0024] Figure 5 for Figure 1 Schematic diagram of the structure of the middle bearing seat;

[0025] Figure 6 for Figure 1 Cross-sectional view of the middle bearing seat;

[0026] Figure 7 for Figure 1 Schematic diagram of the structure of plastic sliding bearing.

[0027] Description of Figure Numbers:

[0028] 100, motor body; 200, end cover; 300, stator; 400, rotor; 410, shaft

[0029] 500, bearing seat mounting portion; 510, mounting cavity; 520, avoidance hole; 530, clamping convexity; 531, first guide inclined surface;

[0030] 600, bearing seat; 610, bearing chamber; 611, limiting side wall; 620, buckle; 621, buckle groove; 622, second guide inclined plane; 623, avoidance inclined plane;

[0031] 700, plastic sliding bearing; 710, inner hole.

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] In the prior art, there is a gap between the ball and the inner ring and the outer ring in the rolling bearing. During the transportation and use of the rolling bearing, the ball is easy to collide with the inner ring and the outer ring, thereby causing micro-motion wear, thereby increasing the rolling friction resistance between the ball and the inner ring and the outer ring, resulting in abnormal noise. In addition, due to the increase in friction resistance, the rolling bearing is easy to heat up and affect the output efficiency of the motor. In addition, since the pressure that the rolling bearing can withstand is relatively low, the material requirements for the rolling bearing are relatively high. Generally speaking, the material of the rolling bearing is a metal material to meet the force requirements of the rolling bearing. However, the rolling bearing runs in the grease to establish an oil film. Because there is a grease oil film between the inner ring, the outer ring and the ball, the three are in an insulating state. However, under certain special conditions, a potential difference will accumulate between the inner ring and the outer ring. When the potential difference is greater than the critical value, the inner ring and the outer ring will instantly force the current to pass through. Sparks are generated in the rolling bearing due to the current passing through, and melting occurs on the track surface or the ball surface, thereby increasing the rolling friction between the ball and the inner ring and the outer ring, resulting in abnormal noise, affecting the user experience.

[0037] The utility model provides a motor.

[0038] Please refer to Figure 1 and Figure 2 In one embodiment of the utility model, the motor comprises:

[0039] The motor body 100 is provided with an opening at one end;

[0040] The end cover 200 is disposed at the opening of the motor body 100. The end cover 200 and the motor body 100 are both provided with a bearing seat mounting portion 500 along the central axis of the motor;

[0041] A bearing seat 600 is disposed on the bearing seat mounting portion 500 , and the bearing seat 600 is provided with a bearing chamber 610 ; and

[0042] The plastic sliding bearing 700 is disposed in the bearing chamber 610 . The plastic sliding bearings 700 on the two bearing seat mounting parts 500 are coaxially distributed. The rotating shaft 410 of the motor is rotatably penetrated through the plastic sliding bearing 700 .

[0043] The technical solution of the utility model is to arrange a bearing seat mounting part 500 on opposite sides of the end cover 200 and the motor body 100, arrange a bearing seat 600 on the bearing seat mounting part 500, and install a plastic sliding bearing 700 in a bearing chamber 610 in the bearing seat 600, wherein the rotating shaft 410 of the motor is rotatably penetrated in the plastic sliding bearing 700. Since the plastic sliding bearing 700 is made of plastic material, the inside and the rotating shaft 410 are in line contact, and it has good insulation. In this way, during the use of the motor, the degree of micro-motion wear of the plastic sliding bearing 700 due to micro-motion is low, and at the same time, the potential difference will not be accumulated between the inner ring and the outer ring of the plastic sliding bearing 700, thereby reducing the possibility of abnormal noise in the motor due to bearing problems, and ensuring the user experience.

[0044] It can be understood that during the rotation of the rotating shaft 410, the inside of the plastic sliding bearing 700 is in line contact, which effectively limits the direction of possible micro-motion collision between the inner ring and the outer ring of the plastic sliding bearing 700, thereby reducing the possibility of micro-motion wear. Specifically, the rotating shaft 410 is rotatably inserted into the inner hole 710 of the plastic sliding bearing 700, achieving two-level sliding friction, thereby ensuring the smooth rotation of the rotating shaft 410.

[0045] It should be noted that, in the present embodiment, the motor body 100 and the end cover 200 enclose a cavity, the rotor 400 is in the cavity, the motor is configured as an external stator motor, the motor body 100 is integrally molded by the stator 300, and the motor body 100 forms a stator structure on the outer periphery of the rotor 400, so that the motor body 100 has both a protective function and the function of the stator 300, thereby reducing the number of components of the motor and facilitating the assembly of the motor. In another embodiment, the motor body 100 is formed by the stator 300 and the housing being connected separately, the housing and the end cover 200 are used to protect the rotor 400 and the stator 300 therein, the stator 300 is fixedly connected to the housing, and the bearing seat mounting portion 500 is only provided on the housing and the end cover 200.

[0046] In one embodiment, please refer to Figures 1 to 4The bearing seat mounting portion 500 is formed with a mounting cavity 510, and the bearing chamber 610 is in the mounting cavity 510. The mounting cavity 510 of the motor body 100 and the mounting cavity 510 of the end cover 200 are arranged opposite to each other. It can be understood that the stopper of the motor body 100 and the stopper of the end cover 200 are opposite to each other, and the mounting cavity 510 of the motor body 100 and its stopper are arranged on the same side, and the mounting cavity 510 of the end cover 200 and its stopper are also arranged on the same side, that is, the mounting cavity 510 is in the motor, wherein the mounting cavity 510 is used for accommodating the bearing chamber 610 in the bearing seat 600, and the bearing chamber 610 is used for limiting the installation of the plastic sliding bearing 700. It can be known that the plastic sliding bearing 700 is also in the motor. In this way, the distance between the bearing chambers 610 in the two bearing seats 600 is close, and when the bearing seats 600 are installed, the eccentricity of the bearing chambers 610 of the two bearing seats 600 can be reduced, thereby ensuring the coaxiality of the two plastic sliding bearings 700. In addition, the bearing chamber 610 is located inside the motor, that is, the plastic sliding bearing 700 is located inside the motor, which prevents the plastic sliding bearing 700 from being polluted by the environment outside the motor, thereby ensuring the stability of the motor. Of course, in other embodiments, the mounting cavity 510 of the motor body 100 and the mounting cavity 510 of the end cover 200 are arranged opposite to each other, that is, the mounting cavity 510 of the motor body 100 and its stopper are arranged on opposite sides, and the mounting cavity 510 of the end cover 200 and its stopper are arranged on opposite sides.

[0047] Further, in this embodiment, please refer to Figures 2 to 5 The bearing seat 600 is also provided with a buckle 620, and the bearing seat mounting portion 500 is provided with a convex 530, which is arranged closer to the outer periphery of the motor than the mounting cavity 510, and the convex 530 is engaged with the buckle 620. It can be understood that the bearing seat 600 is connected to the bearing seat mounting portion 500 by a snap-fitting manner, thereby facilitating the installation of the bearing seat 600, wherein the buckle 620 is arranged on the bearing seat 600, and is engaged with the convex 530 at a position close to the outer surface of the motor, so that the mounting cavity 510 can be closer to the inside of the motor, that is, the coaxiality of the two plastic sliding bearings 700 is guaranteed. It should be noted that the snap-fitting direction of the bearing seat 600 being engaged with the bearing seat mounting portion 500 is different from the rotation direction of the shaft 410, so as to prevent the bearing seat 600 from falling off during use. In other embodiments, the bearing seat 600 may be provided with a latching protrusion 530, and the bearing seat mounting portion 500 may be provided with a latching groove so that the two are latched together, or the bearing seat 600 and the bearing seat mounting portion 500 are connected by screw locking or bonding.

[0048] Specifically, in this embodiment, please refer to Figures 3 to 6The bearing chamber 610 and the buckle 620 are arranged at both ends of the bearing seat 600 along the axial direction of the motor. The bearing seat mounting part 500 is provided with an avoidance hole 520, and the buckle 530 is arranged around the hole of the avoidance hole 520. The buckle 620 is provided with a buckle groove 621. The side of the buckle 530 facing the mounting cavity 510 is provided with a first guide slope 531, and the end of the buckle 620 away from the bearing chamber 610 is provided with a second guide slope 622. The first guide slope 531 and the second guide slope 622 are used to guide the buckle 530 to be snapped into the buckle groove 621. It can be understood that the installation direction of the bearing seat 600 installed on the bearing seat installation part 500 is: from the stop of the motor body 100 or the end cover 200 to the other side, that is, with the motor as a reference, the installation direction of the bearing seat 600 is clamped from the inside to the outside. In this way, during the installation of the bearing seat 600, the buckle 620 is first inserted into the avoidance hole 520, so that the first guide slope 531 and the second guide slope 622 are abutted, and then under the guidance of the two, the bearing seat 600 continues to move outward, and the first guide slope 531 and the second guide slope 622 are separated to the buckle groove 621 and the clamping protrusion 530, so as to facilitate the installation of the bearing seat 600. It should be noted that the avoidance hole 520 is used to avoid the rotating shaft 410, and the end of the bearing seat 600 corresponding to the buckle 620 is also provided with a through hole to ensure that the rotating shaft 410 can pass through the through hole and the bearing chamber 610 to output power. In addition, the bearing chamber 610 and the buckle 620 are arranged at both ends, and the buckle 620 is clamped to the part close to the outside of the motor, so that the plastic sliding bearings 700 on the two bearing seats 600 can be arranged closer to each other, thereby ensuring the coaxiality of the two. Of course, in other embodiments, the clamping part can be arranged at a position near the avoidance opening of the motor body 100 or the end cover 200, and the bearing seat 600 is provided with a clamping flange along the periphery of the bearing chamber 610, and the clamping flange is clamped to the clamping part.

[0049] In one embodiment, please refer to Figures 3 to 6 , the groove side wall of the buckle groove 621 adjacent to the bearing chamber 610 is provided with an avoidance slope 623, and the avoidance slope 623 abuts against the first guide slope 531. Referring to the above structure, the second guide slope 622 is arranged closer to the outside of the motor than the avoidance slope 623. After the buckle groove 621 is engaged with the clamping protrusion 530, the first guide slope 531 abuts against the avoidance slope 623 to reduce the width of the buckle groove 621 in the axial direction of the motor, reduce the volume of the bearing seat 600, ensure the adaptability of the clamping protrusion 530 and the buckle groove 621, and further ensure the compactness and stability of the bearing seat 600 in the bearing seat mounting part 500.

[0050] In one embodiment, please refer to Figure 2 , Figure 6 and Figure 7The bearing chamber 610 is provided with a limiting side wall 611, which extends in a concave arc shape in the axial direction of the motor, and the outer periphery of the plastic sliding bearing 700 is adapted to abut against the limiting side wall 611. It should be noted that the rotating shaft 410 is rotatably connected with the plastic sliding bearing 700, and the rotating shaft 410 and the plastic sliding bearing 700 need to remain stable in the axial direction. In this way, the limiting side wall 611 is concavely arranged in an arc shape in the radial direction of the rotating shaft 410, and the outer periphery of the plastic sliding bearing 700 is arranged in a shape-conforming manner with the limiting side wall 611, and the plastic sliding bearing 700 is limited in the axial direction of the rotating shaft 410, thereby ensuring the stability of the plastic sliding bearing 700 in the bearing seat 600, avoiding relative movement of the rotating shaft 410 and the plastic sliding bearing 700 in the axial direction, and ensuring the stability of the grease film between the two, that is, effectively reducing the friction between the rotating shaft 410 and the plastic sliding bearing 700, thereby reducing the noise of the motor.

[0051] In one embodiment, please refer to Figure 1 and Figure 2 , Figure 5 and Figure 6 , the material of the bearing seat 600 is configured as an elastic material. It can be known from the above structural description that in the process of installing the bearing seat 600 on the bearing seat mounting part 500 and installing the plastic sliding bearing 700 on the bearing seat 600, the bearing seat 600 needs to have a certain deformation. In this way, the material of the bearing seat 600 is configured as an elastic material, so that the bearing seat 600 undergoes elastic deformation during the installation process, so as to facilitate the installation of the bearing seat 600 on the bearing seat mounting part 500 and ensure the stability of the bearing seat 600 in the bearing seat mounting part 500. Similarly, the bearing seat 600 undergoes elastic deformation during the installation of the plastic sliding bearing 700, so as to facilitate the installation of the plastic sliding bearing 700 on the bearing seat 600 and ensure the stability of the plastic sliding bearing 700 in the bearing seat 600. Specifically, the material of the bearing seat 600 is rubber material. Of course, in other embodiments, by assembling the motor body 100 or the end cover 200 with the avoidance hole 520 to form an installation space for the bearing seat 600, or by assembling the bearing seat 600 in parts to form an installation space for the plastic sliding bearing 700, the material of the bearing seat 600 can also be configured as a non-elastic material.

[0052] In one embodiment, please refer to Figure 1 and Figure 2 , the rotating shaft 410 and the plastic sliding bearing 700 are clearance matched. It can be understood that the rotating shaft 410 and the plastic sliding bearing 700 are clearance matched, and then the gap between the two is filled with lubricant to reduce the resistance of the plastic sliding bearing 700 to the rotating shaft 410 and reduce the noise of the motor. Among them, the lubricant can be a grease such as calcium-based grease, sodium-based grease, lithium-based grease, etc., or a lubricating substance such as lubricating oil.

[0053] Further, in this embodiment, please continue to refer to Figure 1 and Figure 2 , the gap between the rotating shaft 410 and the plastic sliding bearing 700 is less than 0.03 mm. It should be noted that the gap between the rotating shaft 410 and the plastic sliding bearing 700 is based on the radial direction of the rotating shaft 410. Due to factors such as the clearance fit between the sliding bearing and the rotating shaft 410, a special interval frequency noise problem will be introduced. Controlling the gap between the rotating shaft 410 and the plastic sliding bearing 700 to be less than 0.03 mm can reduce the noise and effectively ensure the output power of the motor, thereby improving the user experience. Among them, the gap between the rotating shaft 410 and the plastic sliding bearing 700 can be 0.02 mm or 0.025 mm.

[0054] The utility model also proposes a refrigeration device, which includes a motor. The specific structure of the motor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0055] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A motor, characterized in that: include: A motor body, one end of which is open; An end cover is arranged at the opening of the motor body, and the end cover and the motor body are both provided with a bearing seat mounting portion along the central axis of the motor; A bearing seat, disposed on the bearing seat mounting portion, wherein the bearing seat is provided with a bearing chamber; and A plastic sliding bearing is arranged in the bearing chamber, the plastic sliding bearings on the two bearing seat mounting parts are coaxially distributed, and the rotating shaft of the motor is rotatably penetrated by the plastic sliding bearing.

2. The motor according to claim 1, characterized in that The bearing seat mounting portion is formed with a mounting cavity, the bearing chamber is located in the mounting cavity, and the mounting cavity of the motor body and the mounting cavity of the end cover are arranged opposite to each other.

3. The motor according to claim 2, characterized in that The bearing seat is also provided with a buckle, and the bearing seat mounting portion is provided with a clamping protrusion, the clamping protrusion is arranged closer to the outer periphery of the motor than the mounting cavity, and the clamping protrusion is clamped to the buckle.

4. The motor according to claim 3, characterized in that The bearing chamber and the buckle are arranged at two ends of the bearing seat along the axial direction of the motor, the bearing seat mounting portion is provided with an avoidance hole, the buckle convex ring is arranged around the avoidance hole, and the buckle ring is provided with a buckle groove; A first guiding bevel is provided on the side of the latch facing the installation cavity, and a second guiding bevel is provided on the end of the buckle away from the bearing chamber. The first guiding bevel and the second guiding bevel are used to guide the latch to be engaged with the buckle groove.

5. The motor according to claim 4, characterized in that A groove side wall of the buckle groove adjacent to the bearing chamber is provided with an avoidance slope, and the avoidance slope abuts against the first guide slope.

6. The motor according to claim 1, characterized in that The bearing chamber is provided with a limiting side wall, and the limiting side wall extends in a concave arc shape in the axial direction of the motor. The outer periphery of the plastic sliding bearing is adapted to abut against the limiting side wall.

7. The electric machine according to any one of claims 1 to 6, characterized in that The bearing seat is made of elastic material.

8. The electric machine according to any one of claims 1 to 6, characterized in that The rotating shaft is clearance-matched with the plastic sliding bearing.

9. The motor according to claim 8, characterized in that The clearance between the rotating shaft and the plastic sliding bearing is less than 0.03 mm.

10. A refrigeration device, characterized in that: Comprising a motor as claimed in any one of claims 1 to 9.

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