A self-lubricating structure for the rotation of a motor bearing

Abstract

The present invention relates to the technical field of motors, and discloses a self-lubricating structure for the rotation of a motor bearing, including a motor body. One side of the motor body is fixed with an end cover. An installation ring is integrally formed on the outer side of the end cover. A bearing unit is embedded in the installation ring, and a bearing cover is fixed outside the installation ring. The bearing unit includes an outer ring, an inner ring, rolling elements and a cage. The inner ring is sleeved inside the outer ring. The rolling elements are clamped between the inner ring and the outer ring. The cage is limited between the outer ring and the inner ring. Among them, the outer ring and the cage are respectively provided with a first cavity hole and a second cavity hole. The first cavity hole and the second cavity hole are both used for limiting lubricating oil, and the lubricating oil can be limited in the first cavity hole and the second cavity hole under the tension of the lubricating oil, and the lubricating oil is dispersed. Through the first cavity hole and the second cavity hole, the present invention restricts the lubricating oil to achieve lubrication to the greatest extent, makes the motor have a wider application range, can be applicable to different harsh environments, and prolongs the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and specifically to a self-lubricating structure for the rotation of a motor bearing. Background Art

[0002] Bearings are essential parts in the operation of motors, which can greatly reduce the resistance of motor rotation and also minimize the noise of the motor during operation, enabling the motor to operate smoothly. However, bearings generate certain friction during the operation of the motor. To minimize friction to the greatest extent, lubricating oil is added to the bearings.

[0003] In the patent with the authorization announcement number CN113669448B and the name of a sealing component and a motor, it is proposed that on the one hand, the sealing component has a damping cavity and a damping hole communicating with the damping cavity, which can utilize the tension property of the fluid to layer-damp the leaked oil fluid and improve the sealing effect of the sealing component; on the other hand, according to the properties of the lubricating oil and the sealing requirements of the equipment, the number of sealing rings and the number of sealing components can be reasonably selected to improve the sealing performance, effectively improving the design cost and the flexibility of use.

[0004] It is proposed to use a sealing component to seal the lubricating oil, so that the lubricating oil on the bearing is relatively maintained, reducing bearing damage. However, the lubricating oil on the bearing will gradually decrease over time and still requires multiple inspections. Based on this, another motor bearing that can maintain the lubricating oil and the lubricating oil can further lubricate is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-lubricating structure for the rotation of a motor bearing to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A self-lubricating structure for the rotation of a motor bearing, including a motor body, one side of the motor body is fixed with an end cover, an installation ring is integrally formed on the outer side of the end cover, a bearing unit is embedded in the installation ring, and a bearing cover is fixed outside the installation ring;

[0007] The bearing unit includes an outer ring, an inner ring, rolling elements and a cage. The inner ring is sleeved inside the outer ring, the rolling elements are clamped between the inner ring and the outer ring, and the cage is limited between the outer ring and the inner ring;

[0008] Wherein, the outer ring and the cage are respectively provided with a cavity hole one and a cavity hole two, and both the cavity hole one and the cavity hole two are used for limiting the lubricating oil, and the lubricating oil can be limited in the cavity hole one and the cavity hole two under the tension of the lubricating oil, and the lubricating oil is dispersed.

[0009] Preferably, a closable lubricating oil inlet is fixed to the upper end of the mounting ring. The lubricating oil inlet is longitudinally arranged and offset to one side of the mounting ring. An arc-shaped cavity is formed inside the mounting ring, and the arc-shaped cavity communicates with the lubricating oil inlet. A connecting groove is further formed on the outer side of the end cover, and the connecting groove communicates with the arc-shaped cavity. The lower end of the connecting groove communicates with the gap between the outer ring and the inner ring. The lubricating oil moves from the lubricating oil inlet to the gap between the outer ring and the inner ring to lubricate the rolling elements.

[0010] Preferably, a convex layer is integrally formed on the inner wall of the mounting ring, and a concave layer is formed on the outer wall of the outer ring. The convex layer and the concave layer are arranged in cooperation.

[0011] Preferably, the inner side of the outer ring and the outer side of the inner ring are both concave, and the rolling elements are located between the two concavities and can roll.

[0012] The first cavity hole on the outer ring is horizontally arranged and communicates with the depression of the outer ring.

[0013] Preferably, the cage is provided in two halves, and the two halves of the cage are symmetrically distributed. A plug and a plug hole are respectively provided on one side of the two halves of the cage facing each other. The two halves of the cage are matched through the plug and the plug hole. The cross-section of the cage is U-shaped, and it is sleeved on the outer side of the inner ring and contacts the outer side of the inner ring.

[0014] A holding opening for limiting the rolling elements is formed on the outer side of the cage. A plurality of second cavity holes are provided, and the plurality of second cavity holes are respectively distributed on both sides and the outer side of the cage, and the second cavity holes are arranged in a penetrating manner.

[0015] Preferably, scraping assemblies are provided on both sides of the inner ring. The scraping assemblies include driving springs, cylinders and scraping plates.

[0016] A plurality of non-connected circular cavity holes are formed on the outer walls on both sides of the inner ring, and the plurality of circular cavity holes are circumferentially distributed. A plurality of driving springs are provided, and the plurality of driving springs are respectively fixed in the circular cavity holes. A cylinder is fixed on the outer side of each driving spring, and the cylinder is also sleeved in the circular cavity hole. The scraping plate is fixed on the outer side of the cylinder, and the scraping plate is embedded on the outer side of the inner ring. When the scraping plate is squeezed, its outer side is flush with the outer surface of the inner ring. At the same time, the driving spring has a function of squeezing the scraping plate outwards. The scraping plate is inclined. During the rotation of the inner ring, the outer side of the scraping plate scrapes the contact surface to prevent the lubricating oil from approaching the axis of the inner ring.

[0017] Preferably, a plurality of through connecting holes are further formed on the outer side of the cylinder, and the connecting holes are used for balancing air pressure.

[0018] Preferably, a metal clamping layer is further fixed on the outer side of the bearing cover. A plurality of limiting convex strips distributed in a circumferential manner are fixed on the inner side of the metal clamping layer. A foam layer is sleeved on the inner side of the metal clamping layer. The foam layer is used for sleeving the output end on the motor body and adsorbing lubricating oil. The foam layer is located inside the limiting convex strips;

[0019] The foam layer has a reset elasticity, and the foam layer is in interference fit with the metal clamping layer.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) By arranging the scraping component in rotation in the present invention to push the lubricating oil, the scraping component rotates along with the output end, pushing the lubricating oil outwards relatively. During the pushing of the scraping component, the seepage of the lubricating oil is well reduced, the lubrication can last longer, the smoothness of the motor body is improved, and the noise is reduced.

[0022] (2) By arranging the function of the cavity hole 1 on the lubricating oil in the present invention, the rolling elements roll, and the rolling elements guide the lubricating oil. Under the action of the tension, the lubricating oil is restricted in the cavity hole 1 and stays for a longer time, realizing lubrication to the greatest extent, making the motor more widely applicable, capable of being applicable to different harsh environments, and prolonging the service life.

[0023] (3) By arranging the function of the cavity hole 2 on the lubricating oil in the present invention, the cage also rotates, and the cavity hole 2 on its surface also adheres to the lubricating oil, distributing the lubricating oil. Whether it does not run for a long time or runs for a long time, effective lubrication can be achieved, and rust is avoided.

[0024] (4) By arranging the foam layer in the present invention, the output end of the motor body is sleeved, blocking the external dust and adsorbing the lubricating oil seeping outwards inside, preventing the dust from entering the bearing unit and causing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the front side structure of the end cover of the present invention;

[0027] Figure 3 is a schematic diagram of the installation ring structure of the present invention;

[0028] Figure 4 is a schematic diagram of the semi-sectional structure of the bearing unit of the present invention;

[0029] Figure 5 is the present invention Figure 4 is a partial enlarged schematic diagram of A in;

[0030] Figure 6 For the present invention Figure 4 Schematic diagram of the partial enlarged structure of B in the present invention;

[0031] Figure 7 Schematic diagram of the cage structure of the present invention;

[0032] Figure 8 Schematic diagram of the front side structure of the bearing cover of the present invention.

[0033] In the figure: 1, motor body; 2, end cover; 3, mounting ring; 31, lubricating oil inlet; 32, arc cavity opening; 33, connecting groove; 34, convex layer; 4, bearing cover; 5, bearing unit; 51, outer ring; 511, cavity hole one; 52, concave layer; 53, inner ring; 54, rolling element; 55, cage; 551, retaining opening; 552, cavity hole two; 56, scraping assembly; 561, circular cavity hole; 562, driving spring; 563, cylinder; 564, scraper; 565, connecting hole; 6, metal clamping layer; 61, limiting rib; 62, foam layer. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figure 1-7 ,

[0036] Embodiment 1:

[0037] The present invention provides a technical solution: a self-lubricating structure for the rotation of a motor bearing, including a motor body 1, an end cover 2 is fixed on one side of the motor body 1, a mounting ring 3 is integrally formed on the outer side of the end cover 2, a bearing unit 5 is embedded in the mounting ring 3, and a bearing cover 4 is fixed outside the mounting ring 3;

[0038] The bearing unit 5 includes an outer ring 51, an inner ring 53, rolling elements 54 and a cage 55. The inner ring 53 is sleeved inside the outer ring 51, the rolling elements 54 are clamped between the inner ring 53 and the outer ring 51, and the cage 55 is limited between the outer ring 51 and the inner ring 53;

[0039] Among them, the outer ring 51 and the cage 55 are respectively provided with a first cavity 511 and a second cavity 552. The first cavity 511 and the second cavity 552 are both used for limiting the lubricating oil, and the lubricating oil can be limited in the first cavity 511 and the second cavity 552 under the tension of the lubricating oil. The lubricating oil is dispersed, and under the action of the first cavity 511 and the second cavity 552, the lubricating oil remains inside, achieving a limiting effect, and can always maintain a lubricated state, and can still perform maintenance work in harsh environments.

[0040] A closable lubricating oil inlet 31 is fixed at the upper end of the mounting ring 3. The lubricating oil inlet 31 is longitudinally arranged and offset to one side of the mounting ring 3. An arc-shaped cavity 32 is provided on the inner side of the mounting ring 3, and the arc-shaped cavity 32 is communicated with the lubricating oil inlet 31. A connecting groove 33 is also provided on the outer side of the end cover 2, and the connecting groove 33 is communicated with the arc-shaped cavity 32. The lower end of the connecting groove 33 is communicated with the gap between the outer ring 51 and the inner ring 53. The lubricating oil moves from the lubricating oil inlet 31 to the gap between the outer ring 51 and the inner ring 53 to lubricate the rolling elements 54, enabling the lubricating oil to be added at any time, facilitating operation, and allowing the lubricating oil to enter between the outer ring 51 and the inner ring 53.

[0041] A convex layer 34 is integrally formed on the inner wall of the mounting ring 3. A concave layer 52 is provided on the outer wall of the outer ring 51. The convex layer 34 and the concave layer 52 are arranged in cooperation to limit the outer ring 51, making the outer ring 51 immovable while the inner ring 53 can rotate.

[0042] The inner side of the outer ring 51 and the outer side of the inner ring 53 are both recessed. The rolling elements 54 are located between the recesses of the two and can roll.

[0043] The first cavity 511 on the outer ring 51 is horizontally arranged and is communicated with the recess of the outer ring 51. The first cavity 511 can avoid affecting the movement of the rolling elements 54 to the greatest extent, enabling most positions of the rolling elements 54 to still be in contact with the recess of the outer ring 51. At the same time, the lubricating oil adhered to the rolling elements 54 can be limited in the first cavity 511 to lubricate the rolling elements 54 in the case of insufficient lubricating oil and improve smoothness.

[0044] The cage 55 is provided in two halves, and the two halves of the cage 55 are symmetrically distributed. A pin and a pin hole are respectively provided on the opposite sides of the two halves of the cage 55. The two halves of the cage 55 are fitted through the pin and the pin hole. The cross-section of the cage 55 is U-shaped and is sleeved on the outer side of the inner ring 53 and contacts the outer side of the inner ring 53. The U-shaped cage 55 sleeved on the outer side of the inner ring 53 can only play a role in rotation. At the same time, the second cavity 552 on the cage 55 also realizes holding the lubricating oil, which can reduce the outward leakage of the lubricating oil.

[0045] The outer side of the cage 55 is provided with a retaining opening 551 for limiting the rolling elements 54, and a number of second cavities 552 are provided. The number of second cavities 552 are respectively distributed on both sides and the outer side of the cage 55, and the second cavities 552 are arranged in a penetrating manner.

[0046] Scraping components 56 are provided on both sides of the inner ring 53. The scraping components 56 include driving springs 562, cylinders 563 and scraping plates 564.

[0047] A plurality of non - communicating circular cavities 561 are formed on the outer walls on both sides of the inner ring 53. The plurality of circular cavities 561 are distributed in a circumferential manner. A plurality of driving springs 562 are provided. The plurality of driving springs 562 are respectively fixed in the circular cavities 561. A cylinder 563 is fixed on the outer side of each driving spring 562. The cylinder 563 is also sleeved in the circular cavity 561. The scraping plate 564 is fixed on the outer side of the cylinder 563, and the scraping plate 564 is embedded on the outer side of the inner ring 53. When the scraping plate 564 is squeezed, its outer side is flush with the outer surface of the inner ring 53. At the same time, the driving spring 562 has a function of extruding the scraping plate 564 outwards. The scraping plate 564 is inclined. During the rotation of the inner ring 53, the outer side of the scraping plate 564 scrapes the contact surface, so that the lubricating oil is prevented from approaching the axis of the inner ring 53. Under the action of the driving spring 562, the scraping plate 564 is pushed outwards, so that the scraping plate 564 abuts against the outside, and a scraping effect is generated during rotation. At the output end of the motor body 1 during operation, the lubricating oil can be most easily exuded, while the scraping effect reduces the exudation of the lubricating oil.

[0048] A plurality of through - formed connection holes 565 are further formed on the outer side of the cylinder 563. The connection holes 565 are used to balance the air pressure, so that the cylinder 563 moves more smoothly during movement, and the cylinder 563 can perform telescopic movement.

[0049] During the operation of the motor body 1, the output end rotates, and the driving bearing unit 5 is forced to work accordingly. The provided scraping components 56 rotate along with the output end. The scraping plate 564 abuts outwards, and rotates in the Figure 4 rotation direction as shown, and pushes the lubricating oil outwards relatively. During the operation of the output end, due to the influence of vibration or other forces, the lubricating oil is likely to exude. However, the exudation of the lubricating oil is well reduced by the extrusion of the scraping components 56, which can lubricate for a longer time, improve the smoothness of the motor body 1 and reduce the noise.

[0050] Secondly, the inner ring 53 rotates along with the output end on the motor body 1, and the rolling elements 54 also roll accordingly. The lubricating oil is relatively located at the lower end under the action of gravity. The rotating rolling elements 54 guide the lubricating oil, enabling the lubricating oil to adhere to different positions. At the same time, under the action of the tension in the first cavity 511 and the lubricating oil, the lubricating oil is restricted within the first cavity 511. Based on the position of the first cavity 511, the lubricating oil can be distributed over a larger range and stay for a longer time, achieving maximum lubrication, making the motor applicable to a wider range, capable of adapting to different harsh environments, and extending its service life.

[0051] Similarly, the cage 55 also rotates, and the second cavities 552 on its surface also adhere to the lubricating oil, achieving maximum lubrication and distributing the lubricating oil. Then, within the bearing unit 5, the lubricating oil can be maximally applied to different positions. Even if the motor does not operate for a long time or operates for a long time, it can be effectively lubricated to avoid rust formation.

[0052] Please refer to Figure 8 ,

[0053] Embodiment 2:

[0054] On the basis of Embodiment 1, a metal card layer 6 is further fixed to the outer side of the bearing cover 4. A plurality of circumferentially distributed limiting ridges 61 are fixed to the inner side of the metal card layer 6. A foam layer 62 is sleeved on the inner side of the metal card layer 6. The foam layer 62 is used for sleeving the output end on the motor body 1 and adsorbing the lubricating oil. The foam layer 62 is located inside the limiting ridges 61.

[0055] The foam layer 62 has a reset elasticity. The foam layer 62 is in an interference fit with the metal card layer 6. The foam layer 62 can be replaced. It is clamped by the limiting ridges 61 to limit the foam layer 62, and the foam layer 62 can be replaced later.

[0056] The provided foam layer 62 sleeves the output end of the motor body 1, can block external dust, and can also adsorb the lubricating oil seeping out from the inside, preventing the contact between dust and the lubricating oil, and further preventing dust from entering the bearing unit 5 and causing wear.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating structure for the rotation of a motor bearing, comprising a motor body (1), and an end cover (2) is fixed on one side of the motor body (1), characterized in that: An installation ring (3) is integrally formed on the outer side of the end cover (2). A bearing unit (5) is embedded in the installation ring (3), and a bearing cover (4) is fixed outside the installation ring (3). The bearing unit (5) includes an outer ring (51), an inner ring (53), rolling elements (54) and a cage (55). The inner ring (53) is sleeved inside the outer ring (51). The rolling elements (54) are clamped between the inner ring (53) and the outer ring (51), and the cage (55) is limited between the outer ring (51) and the inner ring (53). Wherein, a first cavity hole (511) and a second cavity hole (552) are respectively formed in the outer ring (51) and the cage (55). The first cavity hole (511) and the second cavity hole (552) are both used for limiting lubricating oil, and the lubricating oil can be limited in the first cavity hole (511) and the second cavity hole (552) under the tension of the lubricating oil, and the lubricating oil is dispersed. Scraping assemblies (56) are arranged on both sides of the inner ring (53). The scraping assemblies (56) include driving springs (562), cylinders (563) and scraping plates (564). A plurality of non-connected circular cavity holes (561) are formed in the outer walls on both sides of the inner ring (53). The plurality of circular cavity holes (561) are distributed in a circumferential manner. A plurality of driving springs (562) are provided. The plurality of driving springs (562) are respectively fixed in the circular cavity holes (561). A cylinder (563) is fixed on the outer side of each driving spring (562). The cylinder (563) is also sleeved in the circular cavity hole (561). The scraping plate (564) is fixed on the outer side of the cylinder (563), and the scraping plate (564) is embedded on the outer side of the inner ring (53). When the scraping plate (564) is squeezed, its outer side is flush with the outer side surface of the inner ring (53). At the same time, the driving spring (562) has a function of squeezing the scraping plate (564) outwards. The scraping plate (564) is inclined. During the rotation of the inner ring (53), the outer side of the scraping plate (564) scrapes the contact surface, so that the lubricating oil is prevented from approaching the axis of the inner ring (53).

2. The self-lubricating structure for the rotation of the motor bearing according to claim 1, wherein: A closable lubricating oil inlet (31) is fixed at the upper end of the installation ring (3). The lubricating oil inlet (31) is longitudinally arranged and offset to one side of the installation ring (3). An arc-shaped cavity opening (32) is formed in the inner side of the installation ring (3). The arc-shaped cavity opening (32) is communicated with the lubricating oil inlet (31). A connection groove (33) is also formed on the outer side of the end cover (2). The connection groove (33) is communicated with the arc-shaped cavity opening (32). The lower end of the connection groove (33) is communicated with the gap between the outer ring (51) and the inner ring (53). The lubricating oil moves from the lubricating oil inlet (31) to the gap between the outer ring (51) and the inner ring (53) to lubricate the rolling elements (54).

3. The self-lubricating structure for rotating the motor bearing according to claim 1, wherein: A convex layer (34) is integrally formed on the inner wall of the installation ring (3). A concave layer (52) is formed on the outer wall of the outer ring (51). The convex layer (34) and the concave layer (52) are arranged in a matching manner.

4. The self-lubricating structure for the rotation of the motor bearing according to claim 1, characterized in that: The inner side of the outer ring (51) and the outer side of the inner ring (53) are both recessed, and the rolling elements (54) are located between the recesses of the two and can roll; The first cavity (511) on the outer ring (51) is arranged horizontally, and the first cavity (511) communicates with the recess of the outer ring (51).

5. The self-lubricating structure for rotation of a motor bearing according to claim 1, wherein: The cage (55) is provided in two halves, and the two halves of the cage (55) are symmetrically distributed. Plug pins and plug holes are respectively provided on the opposite sides of the two halves of the cage (55). The two halves of the cage (55) are fitted through the plug pins and the plug holes. The cross section of the cage (55) is U-shaped and it is sleeved on the outer side of the inner ring (53) and contacts the outer side of the inner ring (53); A retaining opening (551) for limiting the rolling elements (54) is formed on the outer side of the cage (55). A number of second cavities (552) are provided, and the number of second cavities (552) are respectively distributed on both sides and the outer side of the cage (55), and the second cavities (552) are arranged in a penetrating manner.

6. The self-lubricating structure for the rotation of the motor bearing according to claim 1, wherein: A plurality of penetrating connection holes (565) are further formed on the outer side of the column body (563), and the connection holes (565) are used for balancing air pressure.

7. The self-lubricating structure for the rotation of the motor bearing according to claim 1, characterized in that: A metal clamping layer (6) is further fixed on the outer side of the bearing cover (4). A plurality of circumferentially distributed limiting ribs (61) are fixed on the inner side of the metal clamping layer (6). A foam layer (62) is sleeved on the inner side of the metal clamping layer (6). The foam layer (62) is used for sleeving on the output end of the motor body (1) and adsorbing lubricating oil. The foam layer (62) is located inside the limiting ribs (61); The foam layer (62) has a reset elasticity, and the foam layer (62) is in interference fit with the metal clamping layer (6).

Images