Full plastic package motor oil bearing assembly and complete machine structure of assembly

Abstract

The utility model belongs to the technical field of motor structures, and particularly relates to a full plastic package motor oil bearing assembly and a whole machine structure of the assembly. The utility model provides a full plastic package motor oil-retaining bearing assembly which structurally comprises a bearing main body, a bottom shell unit, a protruding ring, a circular ring unit with a protruding sheet and a protruding block, so that 1, an oil-retaining bearing is included in the assembly and does not need to be directly installed on a motor plastic package end cover; the end cover cannot be abraded by vibration and displacement which cannot be completely avoided, and a relatively easily-damaged part is only the combined part, so that the replacement cost is relatively low; the requirement for the size of the oil-retaining bearing is low, the outer diameter of the oil-retaining bearing is not only limited at least, and the practicability of the assembly is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor structure, and particularly relates to a fully plastic-sealed motor oil-containing bearing assembly and the whole structure of the assembly. Background Art

[0002] The most prominent feature of the fully plastic-encapsulated motor is that it uses plastic encapsulation technology to encapsulate the motor's stator core, windings, etc. with engineering plastics. The corresponding advantages of the above plastic encapsulation technology are that it can eliminate the stator insulation treatment steps of traditional motors and the metal casing of ordinary motors. Generally, fully plastic-encapsulated motors are mainly used in household appliances such as vacuum cleaners, range hoods, air conditioners, and washing machines.

[0003] On the other hand, oil-containing bearings, also known as porous bearings, are made of metal powder as the main raw material and have porous characteristics. Their working principle is: when not in operation, the lubricating oil fills its pores, and when in operation, the bearings generate heat due to friction, and thermal expansion reduces the pores, causing the lubricating oil to overflow and enter the bearing gap to play a lubricating role. When the shaft stops rotating, the bearing cools, the pores are restored, and the lubricating oil is sucked back into the pores.

[0004] Compared with ordinary bearings, the biggest advantage of oil-containing bearings is that the lubricating oil adding cycle can be greatly extended.

[0005] For example, a Chinese utility model patent with authorization announcement number CN215171578U and authorization announcement date 2021.12.14 discloses an oil-containing bearing, a motor end cover assembly, a motor and an electrical appliance. The oil-containing bearing includes a first bearing and a second bearing. An axial hole passes through the first bearing and the second bearing. The outer diameter of the first bearing is smaller than that of the second bearing. An oil storage component installation position is provided between the outer peripheral surface of the first bearing and the adjacent end surface of the second bearing. A first oil return hole is provided between the outer peripheral surface of the first bearing and the outer wall of the axial hole, and a second oil return hole is provided between the end surface of the second bearing facing the oil storage component installation position and the outer wall of the axial hole.

[0006] The motor end cover assembly in this utility model patent has the following structural principles and advantages: the oil-containing bearing is assembled and fixed in the bearing chamber, the oil-containing bearing is assembled in the bearing chamber by interference fit, the oil storage part of the oil-containing bearing is located on the inner side, so that the oil-containing bearing is in contact with the oil storage part, so that the grease adsorbed in the oil storage part flows through the oil return hole to the surface of the rotor drive shaft in contact with it, and the excess grease can flow back through the oil return hole under the action of gravity and be adsorbed by the oil storage part.

[0007] However, in actual use, the motor end cover assembly still has at least the following two shortcomings, which are also the technical problems to be solved by the utility model, namely:

[0008] First, the oil-containing bearing structure cannot be completely avoided from vibration and displacement during long-term use, which will not only reduce the stability of its interference fit, but also wear the end cover itself, eventually leading to reduced rotor rotation stability and shortened effective service life of the end cover. In addition, the entire end cover needs to be replaced, which is relatively costly.

[0009] Second, in the motor end cover assembly, the size of the bearing chamber corresponds to the size of the oil-containing bearing, so the end cover can only be adapted to the oil-containing bearing with one outer diameter size, which greatly reduces its practicality.

[0010] Therefore, in summary, there is an urgent need for a separate special assembly that can fix the oil-containing bearing separately and has a more flexible and practical fixing effect, so as to be used in the fully plastic-sealed motors of various household appliances. Utility Model Content

[0011] The utility model provides a fully plastic-sealed motor oil-containing bearing assembly, the structural components of which include a bearing body, a bottom shell unit, a protruding ring, a circular ring unit with a protruding piece, and a protruding block, so that: 1. The oil-containing bearing is included in the assembly, and does not need to be directly installed on the plastic-sealed end cover of the motor, so that the vibration and displacement that cannot be completely avoided will not wear the end cover, and the only relatively vulnerable part is the assembly, so the replacement cost is relatively low; 2. The assembly has low requirements on the size of the oil-containing bearing, at least there is no unique restriction on its outer diameter size, which greatly improves the practicality of the assembly.

[0012] In addition, the utility model also provides a complete machine structure including the above-mentioned assembly, which comprises a slotted plastic-sealed housing unit, so that the above-mentioned assembly, the rotor and the stator can be stably installed.

[0013] The technical solution adopted by the utility model to solve the above-mentioned problem is: a fully plastic-sealed motor oil-containing bearing assembly, the structure of which includes a bearing body, a bottom shell unit for mounting the bearing body, a protruding ring arranged on the outer ring surface of the bearing body, a circular ring unit with a protruding piece arranged on the bottom shell unit and used to press down the protruding ring, and a protruding block arranged on the bottom shell unit and used to clamp the circular ring unit with the protruding piece after bending.

[0014] A further preferred technical solution is that the bottom shell unit includes a circular shell for supporting the bearing body, a recessed ring arranged on the annular edge of the circular shell for accommodating lubricating grease, and a support ring arranged on the annular edge of the recessed ring for arranging the circular ring unit with protruding pieces and the protruding blocks.

[0015] A further preferred technical solution is that the protruding ring is arranged on the inner side surface of the circular shell.

[0016] A further preferred technical solution is that the circular ring unit with protruding pieces includes an outer circular ring arranged on the supporting ring and clamped by the protruding blocks, and an inner protruding piece arranged on the inner ring edge of the outer circular ring and used to press down the protruding ring.

[0017] A further preferred technical solution is that the number of the protruding blocks is 3-4, and the number of the inner protruding pieces is 6-10.

[0018] A complete machine structure comprising a fully plastic-encapsulated motor oil-containing bearing assembly comprises a grooved plastic-encapsulated housing unit for inserting and installing the fully plastic-encapsulated motor oil-containing bearing assembly.

[0019] A further preferred technical solution is that it also includes a perforated end cover unit which is plugged into the grooved plastic-sealed housing unit and is used to pass the rotor shaft.

[0020] A further preferred technical solution is that the grooved plastic-sealed shell unit includes an annular shell with a vertical cross-section having a C-shaped single-side shape and used to set the stator, an annular transition piece arranged on the bottom plate of the annular shell and used to support the bottom shell unit, a circular bottom shell arranged on the annular transition piece and used to insert and engage the bottom shell unit, and two vertical rings respectively arranged on the top edge of the annular shell and the annular transition piece and used to engage at both ends of the stator core.

[0021] A further preferred technical solution is that the slotted plastic-sealed housing unit further includes an outer expanded ring body disposed on the middle vertical plate of the annular housing and used to accommodate the stator core, and a mounting transverse plate disposed on the outer expanded ring body.

[0022] A further preferred technical solution is that the perforated end cover unit includes a mounting ring inserted into the upper vertical circular ring, an outer limiting ring arranged on the mounting ring, and a perforated circular plate arranged on the mounting ring and used to pass the rotor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the assembly in the utility model.

[0024] Figure 2 It is a schematic diagram of the position structure of the protruding ring in the utility model.

[0025] Figure 3 It is a structural schematic diagram of the bottom shell unit in the utility model.

[0026] Figure 4 It is a schematic diagram of the position of the protruding block in the utility model from a top view.

[0027] Figure 5It is a schematic diagram of the shape of the circular ring unit with the protruding piece in the utility model when not in use.

[0028] Figure 6 It is a schematic diagram of the method of using the assembly in the utility model.

[0029] Figure 7 It is a schematic diagram of the cross-sectional shape of the grooved plastic-sealed housing unit in the utility model.

[0030] Figure 8 It is a schematic diagram of the installation method of the end cover unit with holes in the utility model.

[0031] Fig. 9 It is a structural schematic diagram of the end cover unit with holes in the utility model.

[0032] Fig.10 It is a schematic diagram of the usage of the grooved plastic-sealed housing unit in the utility model.

[0033] In the figure, the meanings of the symbols are as follows:

[0034] Lubricating grease a, rotor shaft b, stator core c;

[0035] Bearing body 11;

[0036] Bottom shell unit 1, protruding ring 2, circular ring unit with protruding piece 3, protruding block 4;

[0037] Circular shell 101, concave ring 102, support ring 103, outer ring 301, inner protruding piece 302;

[0038] A plastic-sealed housing unit 5 with grooves and an end cover unit 6 with holes;

[0039] Annular housing 501, annular transition piece 502, circular bottom shell 503, vertical circular ring 504, outward expansion ring body 505, mounting horizontal plate 506, mounting ring 601, outer limiting ring 602, circular plate with holes 603;

[0040] Slotted circular pad 7, ball 8. DETAILED DESCRIPTION

[0041] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0042] As attached Figure 1-10As shown, a fully plastic-sealed motor oil-containing bearing assembly comprises a bearing body 11, a bottom shell unit 1 for mounting the bearing body 11, a protruding ring 2 arranged on the outer ring surface of the bearing body 11, a circular ring unit 3 with a protruding piece arranged on the bottom shell unit 1 and used for pressing down the protruding ring 2, and a protruding block 4 arranged on the bottom shell unit 1 and used for clamping the circular ring unit 3 with a protruding piece after being bent.

[0043] In this embodiment, the bearing body 11 and the protruding ring 2 are integrally formed to form a complete oil-containing bearing. The bottom shell unit 1 and the protruding block 4 are integrally formed, and the whole is made of the same material as the protruding ring unit 3, both of which are high-strength metals, so as to fully clamp and fix the oil-containing bearing.

[0044] Thus, the oil-containing bearing is not only fully fixed in the assembly, but also even if a small displacement or vibration occurs, it is only inside the assembly and will not damage the plastic end cover, at least ensuring that the plastic end cover integrally formed with the stator does not need to be replaced due to displacement or vibration of the oil-containing bearing. This greatly reduces the use cost of the fully plastic-encapsulated motor.

[0045] The bottom shell unit 1 includes a circular shell 101 for supporting the bearing body 11, a recessed ring 102 arranged on the annular edge of the circular shell 101 and used to accommodate lubricating paste a, and a support ring 103 arranged on the annular edge of the recessed ring 102 and used to set the protruding sheet circular ring unit 3 and the protruding block 4.

[0046] In this embodiment, the circular shell 101 is in the shape of a bowl, and its specific structure comprises a circular bottom plate and a circular ring which is thick at the top and thin at the bottom and has a convex arc in the vertical cross section.

[0047] The vertical cross-section of the concave ring 102 is U-shaped on one side, ensuring that even relatively large lubricating paste a can be accommodated and filled. The lubricating paste a is a commercially available product used to continuously provide lubricating oil to the oil-containing bearing, and it can also be replaced by lubricating cotton.

[0048] The support ring 103 is a relatively simple flat thin circular ring, which serves as the installation position of the circular ring unit 3 with protruding pieces.

[0049] In addition, the bottom shell unit 1 together with the protruding block 4 as a whole can be chamfered at all transition edges and edges as needed.

[0050] The protruding ring 2 is arranged on the inner side of the circular shell 101 .

[0051] In this embodiment, the specific structural types of the protruding ring 2 are as follows:

[0052] First, the vertical dimension is relatively small, and only the annular inclined upper surface for pressing down is provided to the circular ring unit 3 with the protruding piece, and the lower end of the protruding ring 2 does not abut against the inner side surface of the circular shell 101;

[0053] Second, the vertical dimension is relatively large, and its lower end abuts against the inner side of the circular shell 101. Figure 1 .

[0054] The second structural style of the oil-containing bearing is an optimized solution of the first structural style, and has the following advantages that the first structural style does not have:

[0055] When the oil-containing bearing is installed in the bottom shell unit 1, it also has a lateral limiting effect, making its installation position unique, avoiding the problem that the center line of the oil-containing bearing and the center line of the bottom shell unit 1 do not coincide, thereby ensuring that the annular unit 3 with the protruding piece can evenly press the oil-containing bearing, making it difficult for the oil-containing bearing to fall off after tilting.

[0056] The circular ring unit 3 with protruding pieces includes an outer circular ring 301 arranged on the supporting ring 103 and clamped by the protruding blocks 4 , and an inner protruding piece 302 arranged on the inner ring edge of the outer circular ring 301 and used for pressing down the protruding ring 2 .

[0057] In this embodiment, when the protruding piece circular ring unit 3 is not in use, the inner protruding piece 302 is flush with the outer circular ring 301. The process of the protruding piece circular ring unit 3 being sleeved on the oil-containing bearing and installed downward until it abuts against the support ring 103 is the process of the inner protruding piece 302 bending and pressing the protruding ring 2.

[0058] The number of the protruding blocks 4 is 3-4, and the number of the inner protruding pieces 302 is 6-10.

[0059] A complete machine structure including a fully plastic-encapsulated motor oil-containing bearing assembly includes a grooved plastic-encapsulated housing unit 5 for inserting and installing the fully plastic-encapsulated motor oil-containing bearing assembly.

[0060] In this embodiment, the stator is already inside the slotted plastic-encapsulated housing unit 5 during the molding process. In the normal production process of the fully plastic-encapsulated motor, the slotted plastic-encapsulated housing unit 5 will not exist alone. Figure 7 The grooved plastic-sealed housing unit 5 is listed separately in the figure only to explain its structure and function more clearly.

[0061] At this time, the actual state of the slotted plastic-sealed housing unit 5 is that the stator is already inside it, the center lines of the two coincide, and the two are completely solidified and inseparable. Figure 7The structure of the slotted plastic-sealed housing unit 5 is merely the entirety of the slotted plastic-sealed housing unit 5 and the stator, which is theoretically the remaining housing structure style after the stator is removed.

[0062] The whole machine structure also includes a perforated end cover unit 6 which is plugged into the grooved plastic-sealed housing unit 5 and is used to pass the rotor shaft b.

[0063] In this embodiment, the fully plastic-encapsulated motor is mainly composed of the following four parts: the assembly, the rotor, the slotted plastic-encapsulated housing unit 5 with the stator, and the perforated end cover unit 6.

[0064] At this point, the stator is sleeved on the outside of the rotor, and both ends of the rotor are inserted and limited. The most basic structural requirements of the motor have been fully met.

[0065] The material of the end cover unit 6 with holes is non-metallic, and can be the same plastic as the grooved plastic-sealed housing unit 5 .

[0066] The grooved plastic-sealed housing unit 5 includes an annular housing 501 with a C-shaped vertical cross-section on one side for setting the stator, an annular transition piece 502 arranged on the bottom plate of the annular housing 501 and used to support the bottom housing unit 1, a circular bottom housing 503 arranged on the annular transition piece 502 and used to insert and engage with the bottom housing unit 1, and two vertical rings 504 respectively arranged on the top edge of the annular housing 501 and the annular transition piece 502 and used to engage at both ends of the stator core c.

[0067] In this embodiment, the annular housing 501 has a specific structure of an upper annular flat plate, a middle vertical circular ring and a lower annular flat plate. Therefore, the shape of a single side of the vertical cross section is similar to the letter "C".

[0068] The annular transition piece 502 is used to support the support ring 103, and the inner diameter of the circular bottom shell 503 is slightly smaller than the outer diameter of the circular shell 101, so that the two can be fully and appropriately plugged and installed.

[0069] In addition, the upper and lower two vertical circular rings 504 serve as the engaging and blocking positions of the two end surfaces of the stator core c, that is, the distance between the two vertical circular rings 504 is equal to the axial thickness of the stator core c.

[0070] The inner ring surface of the vertical ring 504 is the inner ring surface of the grooved plastic-sealed housing unit 5 that is finally cast and solidified. However, the inner ring surface of the stator core c may or may not coincide with the above-mentioned inner ring surface. Fig.10 As shown, at this time, the diameter of the inner ring surface of the stator core c is relatively smaller, that is, it is a feasible way to bulge inward.

[0071] In addition, the space between the vertical ring 504 and the annular housing 501, that is, the space between the upper and lower ends of the stator core c, is used to accommodate a stator winding that is larger in size than the stator core c.

[0072] It should be noted that: before the stator and slotted plastic-sealed housing unit 5 are produced and used, there will be a relatively thin plastic solidified layer on the inner ring surface of the stator core c, or the exposed part of the inner ring surface and end surface. However, with the normal use of the fully plastic-sealed motor, the above-mentioned plastic solidified layer may be slightly and slowly worn by the rotor, resulting in the inner ring surface of the stator core c being exposed, but the exposed part is relatively close to the inside and is not easily exposed to water. Therefore, it is still consistent with the "fully plastic-sealed" effect.

[0073] The grooved plastic-sealed housing unit 5 further includes an outer expanded ring body 505 disposed on the middle vertical plate of the annular housing 501 and used to accommodate the stator core c, and a mounting transverse plate 506 disposed on the outer expanded ring body 505 .

[0074] In this embodiment, the opening width of the outer expansion ring body 505 is equal to the distance between the two vertical rings 504, and in the axial direction of the grooved plastic-sealed housing unit 5, that is, the outer expansion ring body 505 is connected to the outer expansion ring body 505. Fig.10 In the vertical direction, the outer expansion ring body 505 has the same function as the two vertical rings 504, which is to clamp and fix the two ends of the stator core c. Fig.10 .

[0075] The entire grooved plastic-sealed housing unit 5 is formed in one piece, and all the dividing lines between the annular housing 501, the annular transition piece 502, the circular bottom shell 503, the vertical annular ring 504, the outer expansion ring body 505 and the installation horizontal plate 506 are essentially non-existent and invisible. Figure 7 The dividing lines are only for clearer explanation and presentation.

[0076] The vertical cross-section of the outer expansion ring body 505 is in a C-shape or an L-shape on one side, so as to ensure that it and the mounting cross plate 506 do not form an opening on the grooved plastic-sealed housing unit 5 .

[0077] In addition, the installation transverse plate 506 is provided with an installation opening, and the annular transition piece 502 and / or the circular bottom shell 503 are provided with heat dissipation holes, and the heat dissipation holes will not expose the stator.

[0078] Finally, the shape of the outer expansion ring body 505 and the installation horizontal plate 506 may not be circular, for example, a triangle, a regular hexagon, etc., so that the fully plastic-encapsulated motor can be adapted to a specific installation position.

[0079] The perforated end cover unit 6 includes a mounting ring 601 inserted into the upper vertical ring 504, an outer limiting ring 602 arranged on the mounting ring 601, and a perforated circular plate 603 arranged on the mounting ring 601 and used to pass the rotor shaft b.

[0080] In this embodiment, the outer limiting ring 602 can provide a unique correct end point for the insertion and installation of the perforated end cover unit 6, so that the perforated circular plate 603 has a suitable socket position on the rotor shaft b.

[0081] In addition, heat dissipation holes may be further provided on the perforated circular plate 603 as required, and the heat dissipation holes also do not affect the overall sealing effect of the fully plastic-encapsulated motor and do not affect the insulation of the stator.

[0082] Finally, the grooved circular pad 7 and the ball 8 can be further arranged as needed inside the bearing body 11 and on the inner bottom surface of the annular housing 501. The grooved circular pad 7 is a circular block with a circular groove, so that the ball 8 can only rotate around its own spherical center on the circular groove, thereby providing the rotor shaft b with an end stop effect with less rolling friction.

[0083] If the grooved circular pad 7 and the ball 8 are not provided, the end of the rotor shaft b will lack the limiting effect, or only a large sliding friction can be obtained on the inner bottom surface of the annular housing 501 .

[0084] The above is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the utility model. 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 utility model.

Claims

1. A fully plastic sealed motor oil-containing bearing assembly, comprising a bearing body (11), characterized in that: It also includes a bottom shell unit (1) for mounting the bearing body (11), a protruding ring (2) arranged on the outer annular surface of the bearing body (11), a circular ring unit (3) with a protruding piece arranged on the bottom shell unit (1) and used to press down the protruding ring (2), and a protruding block (4) arranged on the bottom shell unit (1) and used to clamp the circular ring unit (3) with a protruding piece after being bent.

2. The fully plastic sealed motor oil-containing bearing assembly according to claim 1, characterized in that: The bottom shell unit (1) comprises a circular shell (101) for supporting the bearing body (11), a recessed ring (102) arranged on the annular edge of the circular shell (101) and used to contain lubricating grease (a), and a supporting ring (103) arranged on the annular edge of the recessed ring (102) and used to arrange the protruding sheet circular ring unit (3) and the protruding block (4).

3. The fully plastic sealed motor oil-containing bearing assembly according to claim 2, characterized in that: The protruding ring (2) is arranged on the inner side surface of the circular shell (101).

4. The fully plastic sealed motor oil-containing bearing assembly according to claim 2, characterized in that: The protruding piece circular ring unit (3) comprises an outer circular ring (301) arranged on the supporting ring (103) and clamped by the protruding block (4), and an inner protruding piece (302) arranged on the inner ring edge of the outer circular ring (301) and used to press down the protruding ring (2).

5. The fully plastic sealed motor oil-containing bearing assembly according to claim 4, characterized in that: The number of the protruding blocks (4) is 3-4, and the number of the inner protruding pieces (302) is 6-10.

6. A complete machine structure comprising the fully plastic sealed motor oil-containing bearing assembly as claimed in claim 1, characterized in that: It comprises a grooved plastic-sealed housing unit (5) for inserting and installing the fully plastic-sealed motor oil-containing bearing assembly.

7. The whole machine structure including the fully plastic sealed motor oil-containing bearing assembly according to claim 6, characterized in that: It also includes a perforated end cover unit (6) which is plugged into the grooved plastic-sealed housing unit (5) and is used to pass the rotor shaft (b).

8. The whole machine structure including the fully plastic sealed motor oil-containing bearing assembly according to claim 7, characterized in that: The slotted plastic-sealed housing unit (5) comprises an annular housing (501) having a C-shaped vertical cross-section on one side and used to set the stator, an annular transition piece (502) arranged on the bottom plate of the annular housing (501) and used to support the bottom housing unit (1), a circular bottom housing (503) arranged on the annular transition piece (502) and used to insert and engage with the bottom housing unit (1), and two vertical rings (504) respectively arranged on the top edge of the annular housing (501) and the annular transition piece (502) and used to engage with the two ends of the stator core (c).

9. The whole machine structure including the fully plastic sealed motor oil-containing bearing assembly according to claim 8, characterized in that: The slotted plastic-sealed housing unit (5) further comprises an outer expanded ring body (505) arranged on the middle vertical plate of the annular housing (501) and used to accommodate the stator core (c), and a mounting transverse plate (506) arranged on the outer expanded ring body (505).

10. The whole machine structure including the fully plastic sealed motor oil-containing bearing assembly according to claim 8, characterized in that: The perforated end cover unit (6) comprises a mounting ring (601) inserted into the upper vertical circular ring (504), an outer limiting ring (602) arranged on the mounting ring (601), and a perforated circular plate (603) arranged on the mounting ring (601) and used to pass the rotor shaft (b).

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