Self-adaptive lubrication bearing

Abstract

The utility model discloses a self-adaptive lubricating bearing, which comprises an inner ring, an outer ring and a rolling body positioned between the inner ring and the outer ring, the inner ring and the outer ring are respectively provided with a track groove for accommodating the rolling body, the rolling body is provided with a retainer, an oil storage cavity is arranged in the retainer, and the oil storage cavity is filled with lubricating materials. An oil outlet hole is formed in the oil storage cavity, the lubricating material has a working state that the lubricating material is discharged from the oil outlet hole to the rolling body and the track groove and an idle state that the lubricating material is retained in the oil storage cavity, and when the temperature of the bearing rises to a working threshold value, the lubricating material is switched from the idle state to the working state. According to the utility model, long-acting and self-adaptive lubrication can be realized, the supplement period of a lubricant is prolonged, and tedious procedures are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical transmission component technical field, especially a bearing of self -adaptability lubrication. BACKGROUND

[0002] Rolling bearing is the essential part in modern mechanical equipment, and it realizes rotary support through the cooperation of inner ring, outer ring and rolling body, and is widely used in various transmission systems. In applications such as water pump of water dispenser, the bearing needs long-term continuous operation, and the durability and service life of the bearing are required to be higher. At present, the inside of the common bearing is filled with a sufficient amount of lubricant at one time when it is shipped, so as to realize long-term lubrication. However, the total amount of lubricant in the bearing is fixed, and during long-term operation, the lubricant will gradually be consumed due to oxidation, oil separation, evaporation and micro-leakage with the sealing gap. Once the lubricant is consumed, the bearing will be in dry friction state, which will cause rapid acceleration of wear, abnormal temperature rise, and finally cause noise increase, jamming and even failure, thereby shortening the service life of the whole water pump.

[0003] The traditional pre-filled lubricant method is a kind of "passive" lubrication, and its lubrication effect gradually decreases with the use time, and it cannot perform "active" or "on-demand" lubrication compensation according to the actual working state of the bearing, which makes the consumption of lubricant too fast, and the period of the operator to supplement new lubricant is relatively short, thereby increasing the cumbersome process. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a bearing capable of realizing long-term and self-adaptive lubrication, prolonging the supplement period of lubricant and reducing the cumbersome process.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a bearing capable of realizing self-adaptive lubrication, comprising an inner ring, an outer ring and rolling bodies between the inner ring and the outer ring, wherein track grooves for accommodating the rolling bodies are formed on the inner ring and the outer ring respectively, a retainer is arranged on the rolling body, an oil storage cavity is arranged in the retainer, the oil storage cavity is filled with lubricating material, an oil outlet hole is formed on the oil storage cavity, the lubricating material has a working state of being discharged from the oil outlet hole to the rolling body and the track groove and an idle state of being retained in the oil storage cavity, and the lubricating material is switched from the idle state to the working state when the temperature of the bearing rises to a working threshold.

[0006] By adopting the above technical scheme, long-term and self-adaptive lubrication is realized, the supplement period of lubricant is prolonged, and the cumbersome process is reduced.

[0007] The utility model is further provided as follows: the lubricating material is a solid lubricant, and the solid lubricant is melted into a liquid state when the temperature of the bearing rises to the working threshold.

[0008] The further setting of the utility model is that the rolling body is a plurality of interval arranged ball, the oil storage cavity is configured as a plurality, and is corresponding to the ball position respectively.

[0009] Through the above technical scheme, the oil film adhesion effect of the ball is more uniform, and the lubrication efficiency is higher.

[0010] The further setting of the utility model is that the retainer includes a limiting part corresponding to the position of the rolling body, and the oil storage cavity is located on the limiting part.

[0011] Through the above technical scheme, the distance between the oil storage cavity and the rolling body is shorter, and the lubricating material discharged from the oil outlet hole can quickly contact and lubricate the rolling body, thereby improving the lubrication efficiency.

[0012] The further setting of the utility model is that the oil outlet hole is a tapered hole, which is tapered towards the direction close to the oil storage cavity.

[0013] Through the above technical scheme, the controlled release of the lubricating grease is realized.

[0014] The further setting of the utility model is that the oil outlet hole is a star-shaped hole, and four arc-shaped protrusions symmetrically arranged in pairs are arranged on the outer contour of the oil outlet hole, and each arc-shaped protrusion protrudes towards the center of the oil outlet hole.

[0015] Through the above technical scheme, the controlled release of the lubricating grease is realized.

[0016] The further setting of the utility model is that the oil outlet hole is Y-shaped, and three fan-shaped protrusions with the same shape are arranged on the outer contour of the oil outlet hole, each fan-shaped protrusion protrudes towards the center of the oil outlet hole, and each fan-shaped protrusion is rotationally symmetrical about the center of the oil outlet hole.

[0017] Through the above technical scheme, the shape of the oil outlet can be better maintained, and the control effect is more stable.

[0018] The further setting of the utility model is that a double-layer channel is formed in the outer ring in the circumferential direction, and a sealing ring is arranged on the double-layer channel.

[0019] Through the above technical scheme, the two sealing rings constitute two independent defense lines, which greatly reduces the risk of medium leakage or intrusion; in addition, the double-layer sealing can share the pressure difference, so that the sealing system of the entire bearing can withstand higher pressure.

[0020] In summary, the utility model has the following beneficial effects:

[0021] The oil storage cavity is arranged in the retainer, the oil storage cavity is filled with lubricating material, an oil outlet hole is arranged on the oil storage cavity, the lubricating material has a working state of being discharged from the oil outlet hole to the rolling body and the track groove and an idle state of being retained in the oil storage cavity, the lubricating material is switched from the idle state to the working state when the bearing temperature rises to a working threshold, long-term and self-adaptive lubrication is realized, the lubricant replenishment period is prolonged, and the cumbersome process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the embodiment one of the utility model.

[0023] Figure 2 is a schematic view of the retainer of the utility model.

[0024] Figure 3 is a schematic view of the oil outlet hole in the embodiment one of the utility model.

[0025] Figure 4 is a schematic view of the oil outlet hole in the embodiment two of the utility model.

[0026] Figure 5 is a schematic view of the oil outlet hole in the embodiment three of the utility model.

[0027] Figure 6 is a schematic view of the sealing ring in the embodiment four of the utility model.

[0028] Figure 7 is a schematic view of the utility model after omitting the sealing ring in the embodiment four.

[0029] In the drawing: 1, inner ring; 2, outer ring; 3, rolling body; 4, track groove; 5, retainer; 51, limiting part; 6, oil storage cavity; 61, oil outlet hole; 611, arc-shaped protrusion; 612, fan-shaped protrusion; 7, double-layer channel; 71, sealing ring. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings.

[0031] Embodiment one

[0032] A self-adaptive lubricating bearing, such as Figures 1-3As shown, it comprises an inner ring 1, an outer ring 2, and a rolling element 3 between the inner ring 1 and the outer ring 2, the inner ring 1 and the outer ring 2 are respectively provided with a track groove 4 accommodating the rolling element 3, the rolling element 3 is provided with a retainer 5, the retainer 5 is provided with an oil storage cavity 6, the oil storage cavity 6 is filled with a lubricating material, the lubricating material is a solid lubricant, the oil storage cavity 6 is provided with an oil outlet hole 61, as a preferred embodiment, the needle tip structure forming the oil outlet hole 61 can be designed in the injection mold in advance, so that the oil outlet hole 61 is integrally injection molded with the retainer 5, the lubricating material has a working state of discharging from the oil outlet hole 61 to the rolling element 3 and the track groove 4, and an idle state of staying in the oil storage cavity 6, when the bearing temperature rises to a working threshold, the solid lubricant melts into a liquid state and switches from the idle state to the working state. The working threshold is the temperature at which the lubricating material can be heated and melted. For example, the polyurea-based grease has a significant decrease in consistency with the increase of temperature in the temperature range of 80°C to 180°C, and can be stably and controllably released through the oil outlet hole 61 under the action of the centrifugal force of the bearing operation to form the working state. When the temperature is lower than 80°C, the grease maintains high consistency to form the idle state, effectively prevents leakage, realizes long-acting and self-adaptive lubrication, prolongs the replenishment period of the lubricant, and reduces the cumbersome process.

[0033] Preferably, the rolling element 3 is a plurality of spaced balls, and the oil storage cavity 6 is configured as a plurality of oil storage cavities corresponding to the positions of the balls. By providing a plurality of oil storage cavities 6 to lubricate each ball simultaneously, the oil film adhering effect of the balls is more uniform, and the lubrication efficiency is higher.

[0034] Preferably, the retainer 5 comprises a limiting portion 51 corresponding to the position of the rolling element 3, and the oil storage cavity 6 is located on the limiting portion 51. Through the above design, the distance between the oil storage cavity 6 and the rolling element 3 is shorter, and the lubricating material discharged from the oil outlet hole 61 can quickly contact and lubricate the rolling element 3, thereby improving the lubrication efficiency.

[0035] Preferably, the oil outlet hole 61 is a tapered hole, which is tapered towards the oil storage cavity 6. The tapered hole can play a role similar to a "valve". Because the grease has high viscosity at room temperature, it is difficult to pass through the tapered hole. When the bearing operating temperature rises, the viscosity of the grease decreases, and under the combined action of centrifugal force and thermal expansion pressure, a small amount of grease can slowly seep out through the tapered hole to form an extremely thin oil film. The process is continuous and smooth, and finally realizes the controlled release of the grease. As a preferred embodiment, the needle tip structure forming the tapered hole can be designed in the injection mold in advance, so that the oil outlet hole 61 is integrally injection molded with the retainer 5.

[0036] Example two

[0037] An adaptively lubricated bearing, such as Figure 4 As shown, the difference between this embodiment and specific embodiment one is that the oil outlet 61 is a star-shaped hole, with four symmetrical arc-shaped protrusions 611 on its outer contour, each protruding towards the center of the oil outlet 61. Since grease is a non-Newtonian fluid, its resistance through complex-shaped channels is much greater than through circular channels. The star-shaped hole structure greatly increases the resistance to grease flow, thereby achieving slow release. As a preferred embodiment, the forming structure of the star-shaped hole can be pre-designed in the injection mold, so that the oil outlet 61 and the retainer 5 are integrally injection molded.

[0038] Example 3

[0039] An adaptively lubricated bearing, such as Figure 5 As shown, the difference between this embodiment and specific embodiment one is that the oil outlet 61 is Y-shaped, and its outer contour is provided with three identical fan-shaped protrusions 612. Each fan-shaped protrusion 612 protrudes towards the center of the oil outlet 61, and each fan-shaped protrusion 612 is rotationally symmetrical about the center of the oil outlet 61. The center of the oil outlet 61 gradually narrows towards each branch direction. This structure allows the grease to preferentially seep out from the center of the oil outlet 61 when it softens due to heat, thus better maintaining the shape of the oil outlet and making the control effect more stable. Its working principle is the same as that of the oil outlet 61 in embodiment one and embodiment two, and its purpose is to achieve controllable release of grease. Its manufacturing method is the same as that of the aforementioned oil outlet 61, and will not be described in detail here.

[0040] Example 4

[0041] An adaptively lubricated bearing, such as Figures 6-7 As shown, the difference between this embodiment and specific embodiment one is that the outer ring 2 has a double-layered groove 7 circumferentially, and a sealing ring 71 is provided on each of the double-layered grooves 7. The two sealing rings 71 constitute two independent lines of defense. Even if the first sealing ring 71 fails due to wear, aging or accidental damage, the second sealing ring 71 can still function, greatly reducing the risk of media leakage or intrusion. In addition, the double-layered seal can share the pressure difference, enabling the entire bearing sealing system to withstand higher pressures.

[0042] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A self-adapting lubricated bearing, comprising an inner ring (1), an outer ring (2), and rolling elements (3) located between the inner ring (1) and the outer ring (2), the inner ring (1) and the outer ring (2) are respectively provided with track grooves (4) for accommodating the rolling elements (3), and the rolling elements (3) are provided with a retainer (5), characterized in that: The cage (5) is internally provided with an oil storage cavity (6) filled with lubricating material, the oil storage cavity (6) is provided with an oil outlet hole (61), the lubricating material has a working state of being discharged from the oil outlet hole (61) to the rolling body (3) and the track groove (4) and an idle state of being retained in the oil storage cavity (6), and the lubricating material switches from the idle state to the working state when the bearing temperature rises to a working threshold.

2. A self-lubricating bearing according to claim 1, wherein: The lubricating material is a solid lubricant, and the solid lubricant melts into a liquid state when the bearing temperature rises to a working threshold.

3. A self-lubricating bearing according to claim 2, wherein: The rolling body (3) is a plurality of spaced balls, and the oil storage cavities (6) are correspondingly arranged.

4. A self-lubricating bearing according to claim 3, wherein: The cage (5) comprises a limiting portion (51) corresponding to the position of the rolling body (3), and the oil storage cavities (6) are arranged on the limiting portion (51).

5. A self-lubricating bearing according to claim 1, wherein: The oil outlet hole (61) is a tapered hole, which is tapered towards the oil storage cavity (6).

6. A self-lubricating bearing according to claim 1, wherein: The oil outlet hole (61) is a star-shaped hole, which is provided with four arc-shaped protrusions (611) symmetrically arranged in pairs on the outer contour, and each arc-shaped protrusion (611) protrudes towards the center of the oil outlet hole (61).

7. A self-lubricating bearing according to claim 1, wherein: The oil outlet hole (61) is a Y-shaped hole, which is provided with three fan-shaped protrusions (612) of the same shape on the outer contour, each fan-shaped protrusion (612) protrudes towards the center of the oil outlet hole (61), and each fan-shaped protrusion (612) is rotationally symmetric about the center of the oil outlet hole (61).

8. A self-lubricating bearing according to claim 1, wherein: The outer ring (2) is circumferentially provided with a double-layer channel (7), and the double-layer channel (7) is provided with a sealing ring (71).

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