A structure with a replaceable oil-impregnated bearing for a fully plastic-sealed motor

Abstract

The present invention belongs to the technical field of motor structures, and particularly relates to a structure of an all-plastic-sealed motor with a replaceable oil-impregnated bearing. By means of arranging mounting holes, a support frame unit, a grease unit, and a claw unit on the motor end cover, the present invention enables: 1. The mounting structure of the oil-impregnated bearing is separately arranged from the all-plastic-sealed motor. Even if the former breaks and fails, it can be replaced separately, greatly reducing the risk of the oil-impregnated bearing replacement operation. This can also greatly save materials for the end cover of an ordinary motor, and for an all-plastic-sealed motor, the benefits are even greater; 2. The grease unit is stably mounted by itself and is in full contact with the oil-impregnated bearing, ensuring that the mounting structure of the oil-impregnated bearing has a lubricating oil replenishment function, so that the frequency of external oil filling operations can be greatly reduced, which is very convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor structures, and particularly relates to a structure of an all-plastic-sealed motor with a replaceable oil-impregnated bearing. Background Art

[0002] For an ordinary motor, its stator part includes a metal shell, an iron core, windings, and wires. An all-plastic-sealed motor refers to a special motor in which the iron core, windings, and wire mounting ends are all encapsulated with plastic. Its advantages are that the metal shell is omitted, and the insulation and waterproof performance of the stator part are very excellent. However, its disadvantage is that it can generally only be made into a micro motor, so it is more common in the household appliance field where water may be encountered during use.

[0003] On the other hand, an oil-impregnated bearing refers to a bearing whose material has a porous property, and lubricating oil is added into the pores. When the oil-impregnated bearing is running, the pores shrink due to the thermal expansion of the material itself, and at this time, the lubricating oil overflows, playing a role of lubrication and protection. After the bearing stops, the pores recover, and the lubricating oil is sucked back again. Therefore, one of the advantages of the oil-impregnated bearing is that the effective service life of the lubricating oil is relatively long.

[0004] Therefore, when the rotor is installed and used on an all-plastic-sealed motor, an oil-impregnated bearing can be adopted. At this time, the all-plastic-sealed motor needs to provide a stable installation structure for the oil-impregnated bearing during use and a convenient replacement structure.

[0005] The Chinese utility model patent with the patent publication number CN206268296U and the publication date of June 20, 2017 discloses a bearing positioning structure, including an end cover, a claw, a protruding part, and a step. The inner surface of the end cover is provided with a cavity for accommodating the bearing. The claw is arranged at the bottom of the cavity. The protruding part includes a first limiting part and a second limiting part that are vertically connected. The first limiting part contacts the inner wall of the cavity, and the second limiting part contacts the inner surface of the end cover. The claw and the protruding part are symmetrically arranged about the axis of the cavity. The step is located at the bottom of the cavity and extends into the cavity from the non-contact surface of the first limiting part with the cavity.

[0006] The general structural principle of the bearing positioning structure in this utility model patent is as follows: The bearing is pressed on the step, and the protruding part and the claw together form an "inverted L-shaped" structure, and finally the bearing is clamped and pressed. When the bearing needs to be replaced, the above-mentioned claw can be pushed outwards and opened.

[0007] However, during actual use, the bearing positioning structure has at least the following two deficiencies, that is, the technical problems to be solved by the present invention.

[0008] 1. If the "inverted L-shaped" structure formed by the protruding part and the claw breaks, the entire end cover needs to be replaced, ultimately resulting in a large amount of material waste.

[0009] 2. When the bearing type is selected as an oil-containing bearing, the bearing positioning structure itself cannot add lubricating oil to the oil-containing bearing and can only add it externally, which is very troublesome.

[0010] Therefore, in summary, there is an urgent need for a bearing installation structure with low risk of bearing replacement operation and built-in lubricating oil replenishing function, which can be used in fully plastic-sealed motors and oil-containing bearings. Summary of the invention

[0011] The present invention provides a replaceable structure of an oil-containing bearing of a fully plastic-sealed motor, which can be achieved by arranging a mounting hole, a support frame unit, a grease unit, and a claw unit on an end cover of the motor, so that: 1. The mounting structure of the oil-containing bearing is separately arranged from the fully plastic-sealed motor, and even if the former is broken and fails, it can be replaced separately, which greatly reduces the risk of the oil-containing bearing replacement operation. This can also greatly save materials for the end cover of an ordinary motor, and the benefits are even greater for the fully plastic-sealed motor; 2. The grease unit itself is stably installed and fully contacts the oil-containing bearing, ensuring that the mounting structure of the oil-containing bearing has a lubricating oil replenishing function, so that the frequency of external refueling operations can be greatly reduced, which is very convenient.

[0012] The technical solution adopted by the present invention to solve the above-mentioned problem is: a structure with a replaceable oil-containing bearing of a fully plastic-encapsulated motor, comprising a motor end cover and an oil-containing bearing, and also comprising a mounting hole arranged on the motor end cover, a support frame unit arranged on the inner side surface of the motor end cover and used to sleeve the oil-containing bearing, a grease unit arranged on the support frame unit and used to replenish lubricating oil to the oil-containing bearing, and a claw unit arranged on the outer side surface of the motor end cover, passing through the mounting hole, and used to engage and fix the support frame unit.

[0013] A further preferred technical solution is that the support frame unit includes a circular base plate arranged on the inner side of the motor end cover, a limiting inner ring arranged on the circular base plate and plugged into the oil-containing bearing, a supporting outer ring arranged on the circular base plate and supporting the oil-containing bearing, and an opening arranged on the circular base plate and used to install the grease unit.

[0014] A further preferred technical solution is that the claw unit includes a cross-shaped plate arranged on the outer side of the motor end cover, a connecting plate arranged at the end of the cross-shaped plate and passing through the mounting hole, and a clamping plate arranged on the connecting plate and used to clamp the circular base plate.

[0015] A further preferred technical solution is that the number of the mounting holes and the number of the grease units are both 4.

[0016] A further preferred technical solution is that: a cross-shaped card slot for fixing the cross-shaped plate is further provided on the outer side surface of the motor end cover.

[0017] A further preferred technical solution is that: the grease unit includes a protruding inclined plate arranged on the radially outer side edge of the opening, and a grease block arranged on the opening and pressed by the protruding inclined plate on the end face of the oil-containing bearing.

[0018] A further preferred technical solution is that: the claw unit further includes a limiting plate arranged on the engaging plate and used for preventing the protruding inclined plate from retracting.

[0019] A further preferred technical solution is that: the grease unit further includes a lower pressing plate arranged on the protruding inclined plate and used for pushing the grease block.

[0020] A further preferred technical solution is that: the grease unit further includes a radially outer leakage prevention plate arranged on the lower pressing plate and used for blocking the grease block.

[0021] A further preferred technical solution is that: the radially outer leakage prevention plate is pressed on the inner side surface of the motor end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention.

[0023] Figure 2 is a schematic structural diagram of the claw unit in the present invention.

[0024] Figure 3 is a schematic position structure diagram of the support frame unit in the present invention.

[0025] Figure 4 is a schematic position structure diagram of the grease unit in the present invention.

[0026] Figure 5 is a schematic diagram of the position and shape of the opening in the present invention from a top view angle.

[0027] Figure 6 is a schematic diagram of the position and shape of the limiting plate in the present invention.

[0028] In the figure, the meanings of the various marks are as follows:

[0029] rotor a;

[0030] motor end cover 10, oil-containing bearing 11;

[0031] mounting hole 1, support frame unit 2, grease unit 3, claw unit 4, cross-shaped card slot 5;

[0032] Circular bottom plate 201 , limiting inner ring 202 , supporting outer ring 203 , opening 204 , cross-shaped plate 401 , connecting plate 402 , engaging plate 403 , protruding inclined plate 301 , grease block 302 , limiting plate 404 , lower pressure plate 303 , radial outer anti-leakage plate 304 . DETAILED DESCRIPTION

[0033] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0034] As attached Figure 1-6 As shown, a structure of a replaceable oil-containing bearing of a fully plastic-encapsulated motor includes a motor end cover 10 and an oil-containing bearing 11, and also includes a mounting hole 1 arranged on the motor end cover 10, a support frame unit 2 arranged on the inner side surface of the motor end cover 10 and used to sleeve the oil-containing bearing 11, a grease unit 3 arranged on the support frame unit 2 and used to replenish lubricating oil to the oil-containing bearing 11, and a claw unit 4 arranged on the outer side surface of the motor end cover 10 and passing through the mounting hole 1 and used to clamp and fix the support frame unit 2.

[0035] In this embodiment, the motor end cover 10 is a part of the fully plastic-encapsulated motor, and the oil-containing bearing 11 is an existing common porous material type oil-containing bearing, and the oil-containing bearing 11 is used to stably protect the rotation of the rotor a.

[0036] In addition, the support frame unit 2 and the claw unit 4 are the installation transition parts between the motor end cover 10 and the oil-containing bearing 11, and the claw unit 4 is the only disassembly operation part when the oil-containing bearing 11 is replaced. Therefore, even if the oil-containing bearing is replaced improperly, only a new claw unit 4 is needed, and there is no need to replace the motor end cover 10 and the entire fully plastic-encapsulated motor, which is very safe and low-cost.

[0037] In addition, the grease unit 3 is arranged on the support frame unit 2, and has its own "standby" grease block, which is always in close contact with the oil-containing bearing 11, ensuring that the oil-containing bearing 11 can be replenished with lubricating oil for a long time, and ultimately the frequency of external refueling operations can be further reduced, and the grease block may only be added once every few years, which greatly improves the user experience of the entire fully plastic-encapsulated motor.

[0038] The support frame unit 2 includes a circular base plate 201 arranged on the inner side of the motor end cover 10, a limiting inner ring 202 arranged on the circular base plate 201 and plugged into the oil-containing bearing 11, a supporting outer ring 203 arranged on the circular base plate 201 and supporting the oil-containing bearing 11, and an opening 204 arranged on the circular base plate 201 and used to install the grease unit 3.

[0039] In this embodiment, on the front and rear sides of the oil-impregnated bearing 11 are respectively the support outer ring 203 and other existing engaging structures, while on the left and right sides of the oil-impregnated bearing 11 are the limit inner rings 202, so that the oil-impregnated bearing 11 can be stably installed.

[0040] Next, the rotor a is inserted into the oil-impregnated bearing 11, which can ensure the stable rotation and non-offset of the former, and the rotation resistance is relatively extremely small.

[0041] Finally, the claw unit 4 fixes the circular bottom plate 201, that is, indirectly fixes and installs the oil-impregnated bearing 11.

[0042] The claw unit 4 includes a cross-shaped plate 401 arranged on the outer side surface of the motor end cover 10, a connecting plate 402 arranged at the end position of the cross-shaped plate 401 and passing through the mounting hole 1, and a clamping plate 403 arranged on the connecting plate 402 and used for pressing the circular bottom plate 201.

[0043] In this embodiment, the claw unit 4 is integrally formed, and the connecting plate 402 and the clamping plate 403 are only two bent plate bodies, finally ensuring that the circular bottom plate 201 can be stably pressed on the inner side surface of the motor end cover 10.

[0044] The number of both the mounting holes 1 and the grease units 3 is 4.

[0045] In this embodiment, the claw unit 4 can further reinforce the grease unit 3, so the numbers of the clamping plate 403, the mounting hole 1, and the grease unit 3 are the same and their positions are aligned.

[0046] On the outer side surface of the motor end cover 10, there is also a cross-shaped card slot 5 for fixing the cross-shaped plate 401.

[0047] In this embodiment, the cross-shaped card slot 5 provides a pre-aligned and fixed mounting site for the cross-shaped plate 401, ensuring the relatively precise mounting action of the latter.

[0048] The grease unit 3 includes a protruding inclined plate 301 arranged on the radially outer side edge of the opening 204, and a grease block 302 arranged on the opening 204 and pressed by the protruding inclined plate 301 on the end surface of the oil-impregnated bearing 11.

[0049] In this embodiment, the material of the grease block 302 is the commonly used paste-like lubricating oil. Its radially outer side is the protruding inclined plate 301, its radially inner side is the support outer ring 203, its lower side is the inner side surface of the motor end cover 10, its upper side is the end surface of the oil-impregnated bearing 11, and the left and right sides are finally exposed, which are the manual supplementary addition parts of the grease block.

[0050] During use, the grease block 302 itself will volatilize and decrease slightly, mainly replenishing lubricating oil into the pores of the oil-impregnated bearing 11. Therefore, the upper part of it is slowly "swallowed". So, the protruding inclined plate 301 is provided to push the grease block 302 with reduced volume inward and upward, ensuring that the upper part of the grease block 302 always abuts against the end face of the oil-impregnated bearing 11, that is, the lubricating oil replenishing function remains continuously effective.

[0051] Of course, it is difficult for lubricating oil to enter and fill the parts such as the motor end cover 10, the protruding inclined plate 301, and the support outer ring 203. Therefore, it is also difficult to waste the grease block 302.

[0052] The claw unit 4 further includes a limiting plate 404 provided on the engaging plate 403 and used for preventing the protruding inclined plate 301 from retracting.

[0053] In this embodiment, the limiting plate 404 is a new bent section on the engaging plate 403, ensuring that the relatively thin and easily bendable protruding inclined plate 301 is difficult to retract outward during the whole process of pressing the grease block 302 inward. Otherwise, it is easy for the grease block 302 to separate from the end face of the oil-impregnated bearing 11, resulting in the failure of the lubricating oil replenishing function, which needs to be avoided.

[0054] The grease unit 3 further includes a lower pressing plate 303 provided on the protruding inclined plate 301 and used for pushing the grease block 302.

[0055] In this embodiment, the protruding inclined plate 301 and the lower pressing plate 303 are the plate bodies lifted upward after cutting at the opening 204, and their material is naturally the same as that of the circular bottom plate 201, selected as thin steel plate, ensuring that the protruding inclined plate 301 can be bent and adjusted relatively frequently. For example, every 6 - 12 months, the inclination angle of the protruding inclined plate 301 decreases downward by 2°, ensuring that the gradually shrinking grease block 302 can still always abut against and contact the end face of the oil-impregnated bearing 11, ensuring that the lubricating oil replenishing function of the grease unit 3 remains continuously effective.

[0056] In addition, the lower pressing plate 303 presses a part of the upper surface of the grease block 302, ensuring that the un-pressed part can fully abut against the end face of the oil-impregnated bearing 11, and can also further reduce the self-volatilization loss rate of the grease block 302.

[0057] The grease unit 3 further includes a radial outer leakage prevention plate 304 provided on the lower pressing plate 303 and used for blocking the grease block 302.

[0058] In this embodiment, the effect of the radial outer anti-leakage plate 304 is similar to that of the lower pressure plate 303, so as to provide a relatively small installation space for the grease block 302. Otherwise, a large amount of the grease block 302 is required to contact the end face of the oil-containing bearing 11, which is relatively wasteful.

[0059] Finally, the grease block 302 forms an "L-shaped" structure between the lower pressure plate 303, the radial outer anti-leakage plate 304, the motor end cover 10, and the supporting outer ring 203, ensuring that the upper side can fully contact the end face of the oil-containing bearing 11 and grease can be added on both sides.

[0060] The radially outer leakage prevention plate 304 is pressed onto the inner side surface of the motor end cover 10 .

[0061] In this embodiment, the radially outer leakage prevention plate 304 is relatively long, and after it abuts against the inner side of the motor end cover 10, it can prevent the grease block 302 from leaking radially outward, because once the grease reaches the position between the protruding inclined plate 301 and the radially outer leakage prevention plate 304, it will directly fail. This is also to be avoided, that is, the radially outer leakage prevention plate 304 itself bends and presses the inner side of the motor end cover 10.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor, including a motor end cover (10) and an oil-impregnated bearing (11). Characterized in that: It further includes a mounting hole (1) provided on the motor end cover (10), a support frame unit (2) provided on the inner side surface of the motor end cover (10) and used for sleeving the oil-impregnated bearing (11), a grease unit (3) provided on the support frame unit (2) and used for replenishing lubricating oil to the oil-impregnated bearing (11), and a claw unit (4) provided on the outer side surface of the motor end cover (10), passing through the mounting hole (1) and used for clamping and fixing the support frame unit (2). The support frame unit (2) includes a circular bottom plate (201) provided on the inner side surface of the motor end cover (10), a limit inner ring (202) provided on the circular bottom plate (201) and inserted into the oil-impregnated bearing (11), a support outer ring (203) provided on the circular bottom plate (201) and abutting against the oil-impregnated bearing (11), and an opening (204) provided on the circular bottom plate (201) and used for installing the grease unit (3).

2. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor according to claim 1, Characterized in that: The claw unit (4) includes a cross-shaped plate (401) provided on the outer side surface of the motor end cover (10), a connecting plate (402) provided at the end position of the cross-shaped plate (401) and passing through the mounting hole (1), and a clamping plate (403) provided on the connecting plate (402) and used for pressing the circular bottom plate (201).

3. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor according to claim 2, Characterized in that: The numbers of both the mounting hole (1) and the grease unit (3) are 4.

4. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor according to claim 2, Characterized in that: A cross-shaped card slot (5) for fixing the cross-shaped plate (401) is further provided on the outer side surface of the motor end cover (10).

5. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor according to claim 2, Characterized in that: The grease unit (3) includes a protruding inclined plate (301) provided on the radial outer side edge of the opening (204), and a grease block (302) provided on the opening (204) and pressed by the protruding inclined plate (301) on the end surface of the oil-impregnated bearing (11).

6. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor according to claim 5, Characterized in that: The claw unit (4) further includes a limiting plate (404) provided on the clamping plate (403) and used for performing an anti-retreat operation on the protruding inclined plate (301).

7. A structure with a replaceable oil-impregnated bearing for a fully plastic-encapsulated motor according to claim 5, Characterized in that: The grease unit (3) further includes a lower pressing plate (303) provided on the protruding inclined plate (301) and used for pushing the grease block (302).

8. A replaceable structure of an oil-impregnated bearing for a fully plastic-sealed motor according to claim 7, characterized in that: the grease unit (3) further includes a radially outer leakage-preventing plate (304) disposed on the lower pressing plate (303) and used for blocking the radially outer side of the grease block (302).

9. A replaceable structure of an oil-impregnated bearing for a fully plastic-sealed motor according to claim 8, characterized in that: the radially outer leakage-preventing plate (304) is pressed against the inner side surface of the motor end cover (10).

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