CN220204382U - Rolling bearing and engine - Google Patents

Abstract

The utility model relates to the technical field of engines, and discloses a rolling bearing and an engine, wherein the rolling bearing comprises: the bearing outer ring is coaxially sleeved outside the bearing inner ring; the rolling bodies are arranged in a cavity between the bearing inner ring and the bearing outer ring at intervals; the dust cover is arranged on the splash lubricating oil side of the rolling bearing and is provided with a first gap with the rolling body, and a through hole communicated with the cavity is formed in the dust cover. According to the utility model, the through hole is formed in the dust cover, so that splashed lubricating oil can smoothly reach the rolling body, larger particle impurities in the lubricating oil are prevented from reaching the rolling body, and the clamping stagnation and abrasion of the rolling body are reduced.

Description

Rolling bearing and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a rolling bearing and an engine.

Background

Rolling bearings are commonly used to support rotating components and reduce friction, and by using rolling elements (such as balls or rollers), rolling bearings allow smoother rotational movement, thereby extending the service life of the engine.

At present, a splash lubrication mode is generally adopted to lubricate the rolling bearing in the engine, dust, dirt and other impurities need to be prevented from entering the rolling bearing in the process, and meanwhile, the rolling bearing is lubricated smoothly, so that the service life of the rolling bearing is prolonged, and the normal operation of the engine is ensured.

Disclosure of Invention

In view of the above, the present utility model provides a rolling bearing and an engine, so as to solve the problem that large particle impurities in lubricating oil enter the rolling bearing to cause damage to rolling elements of the rolling bearing while splash lubrication is performed on the rolling bearing.

In one aspect, the present utility model provides a rolling bearing device comprising:

a bearing inner ring;

the bearing outer ring is coaxially sleeved outside the bearing inner ring;

the plurality of rolling bodies are arranged in a cavity between the bearing inner ring and the bearing outer at intervals;

the dustproof cover is arranged on the splash lubricating oil side of the rolling bearing and a first gap is reserved between the dustproof cover and the rolling body, and a through hole communicated with the cavity is formed in the dustproof cover.

The beneficial effects are that: according to the utility model, the dust cover is arranged on the outer side of the rolling body, and the through hole is arranged on the dust cover, so that the splash lubricating oil can smoothly reach the rolling body and simultaneously the entry of larger particle impurities in the lubricating oil is blocked, and the clamping stagnation and abrasion of the rolling body are reduced.

In an alternative embodiment, the dust cover is in a ring shape with a central hole, the number of the through holes is a plurality, and the plurality of through holes are distributed on the dust cover around the central hole.

The beneficial effects are that: be equipped with a plurality of through-holes on the shield, can increase the lubrication area to the rolling element for lubrication efficiency. In addition, through the arrangement of the through holes, the air flow speed in the cavity can be increased, the temperature of the whole rolling bearing is effectively reduced, and the heat dissipation performance of the rolling bearing is further improved.

In an alternative embodiment, the plurality of through holes are arranged to form at least one annular through hole group, and the through holes on each annular through hole group are arranged at intervals of 1mm-2mm.

The beneficial effects are that: the plurality of through holes are distributed to form at least one annular through hole group, and the through holes on each annular through hole group are arranged at intervals of 1mm-2mm, so that dense ventilation channels can be formed by the through holes, the air flow speed and the flow quantity are improved, and the heat dissipation performance of the rolling bearing is further enhanced. And the through holes can form dense lubrication channels, which is beneficial to increasing the lubrication area of the lubricating oil to the rolling bodies and accelerating the lubrication efficiency.

In an alternative embodiment, the through holes on adjacent annular through hole groups can be arranged in a one-to-one correspondence in the radial direction, or can be staggered, and the radial interval is 0.5mm-1mm.

The beneficial effects are that: through set up the through-hole on the shield, can form more intensive ventilation passageway, improve air flow rate and circulation of air to can take away the inside dust of antifriction bearing or foreign matter such as granule impurity, keep the inside clean and clean of antifriction bearing.

In an alternative embodiment, the through hole is a round hole, and the diameter of the round hole is 0.2mm-3mm.

The beneficial effects are that: the through holes are arranged as round holes, so that the manufacturing is easier. In addition, through holes with proper diameters can be selected according to different working environments, so that the possibility that large particle impurities enter the rolling bodies is reduced, and the rolling bodies are better adapted to the requirements in specific environments.

In an alternative embodiment, the through holes are non-circular holes with an area of 0.01 pi mm ² -2.25πmm ² 。

The beneficial effects are that: according to different working environments, the area of the non-circular holes is adjusted, the possibility that large-particle impurities enter the rolling bodies is reduced, and the rolling bodies are better adapted to the requirements in specific environments.

In an optional embodiment, a mounting groove is formed at the position where the bearing outer ring is used for mounting the dust cover, one end of the dust cover is detachably abutted in the mounting groove, a second gap is reserved between the other end of the dust cover and the outer surface of the bearing inner ring, and the second gap is 0.05mm-2mm.

The beneficial effects are that: the dust cover is detachably connected with the bearing outer ring, so that the dust cover is convenient to maintain, replace and clean in the later period; further, the second clearance that leaves between the other end of shield and the bearing inner race can guarantee that the shield obstructs large granule impurity and allow lubricating oil to pass through, can not exert an influence to antifriction bearing's bearing outer lane and bearing inner race's relative rotation.

In an alternative embodiment, the dust cover includes annular dust cover body, along the outward flange of dust cover body to the connecting portion of cavity place direction slope and by the outward flange of connecting portion is to keeping away from the turn-up that the cavity place direction curled, the mounting groove keep away from the lateral wall of cavity sets up to the inclined plane, by the tank bottom of mounting groove to opening direction, the inclined plane is gradually to keeping away from the direction slope of cavity, the turn-up is located in the mounting groove and with the inclined plane looks butt.

The beneficial effects are that: vibration generated in the motion process of the outer ring of the bearing is damped and absorbed through the curled edges and the connecting parts, the influence on the dust cover body is reduced, and lubricating oil is uniformly covered on all rolling bodies of the rolling bearing.

In an alternative embodiment, the through holes are arranged towards the rolling bodies and are uniformly distributed on the dust cover body.

The beneficial effects are that: the through holes are arranged towards the rolling bodies and evenly distributed on the dust cover body, so that the lubrication area of the rolling bodies can be increased, the lubrication oil can be uniformly covered on all the rolling bodies of the rolling bearing, and the local damage of the rolling bearing caused by uneven lubrication is avoided. And also enables air to pass through the rolling elements more quickly, reducing the temperature of the rolling elements.

In a second aspect, the present utility model also provides an engine comprising:

in the rolling bearing, the rolling bearing is arranged in the cylinder body of the engine.

The engine according to the utility model has all the advantages of the rolling bearing described above and will not be described in detail here.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a rolling bearing according to an embodiment of the present utility model;

fig. 2 is a view from the perspective of fig. 1 in the direction A-A.

Reference numerals illustrate:

1. a bearing inner ring; 101. a concave raceway; 2. a bearing outer ring; 201. a mounting groove; 3. a rolling element; 301. a retainer; 4. a dust cover; 401. a through hole; 402. a connection part; 403. hemming; 5. a first gap; 6. and a second gap.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a rolling bearing and an engine, aiming at the problem that large-particle impurities can enter the rolling bearing along with lubricating oil to cause damage to rolling bodies of the rolling bearing when the rolling bearing is subjected to splash lubrication.

An embodiment of the present utility model is described below with reference to fig. 1 to 2.

According to an embodiment of the present utility model, in one aspect, there is provided a rolling bearing including: a bearing inner ring 1, a bearing outer ring 2, a plurality of rolling elements 3 and a dust cover 4.

Specifically, the bearing outer ring 2 is coaxially sleeved outside the bearing inner ring 1; the plurality of rolling bodies 3 are arranged in a cavity between the bearing inner ring 1 and the bearing outer ring 2 at intervals; the dust cover 4 is mounted on the splash lubrication side of the rolling bearing and a first gap 5 is reserved between the dust cover 4 and the rolling body 3, and a through 401 communicated with the cavity is arranged on the dust cover 4.

In the present embodiment, the dust cap 4 may be provided on one side or on opposite sides of the rolling element 3. As shown in fig. 1, when the dust cover 4 is provided on one side of the rolling elements 3, the side on which the dust cover 4 is provided is the side on which the lubricant splashes, i.e., the direction B in the drawing. At this time, the dust cover 4 can prevent large particle impurities from entering the inside of the rolling bearing, but lubricating oil can adhere to the rolling elements 3 through the through holes 401. When both sides of the rolling bearing are splash sides of the lubricating oil, the dust cover 4 needs to be arranged on both opposite sides of the rolling body 3 so as to block large-particle impurities and lubricate the rolling body 3.

In this embodiment, the end surfaces of the bearing inner ring 1 and the bearing outer ring 2 which are disposed opposite to each other are further provided with recessed raceways 101 for rolling the rolling elements 3. By arranging the concave rollaway nest 101 for the rolling bodies 3 to roll on the end surfaces of the bearing inner ring 1 and the bearing outer ring 2 which are oppositely arranged, the rolling bodies 3 can roll freely between the bearing inner ring 1 and the bearing outer ring 2, thereby reducing friction and resistance, improving the efficiency and the service life of the rolling bearing. At the same time, the concave raceway 101 also positions the rolling elements 3 and maintains the stability of the rolling bearing.

Further, in the present embodiment, the peripheral side of each rolling element 3 is further provided with a cage 301 for preventing mutual friction between the adjacent rolling elements 3. By providing the cage 301, the rolling elements 3 can be kept at the correct positions of the raceways all the time, and relative movement and collision of the rolling elements can be prevented when the rolling elements rotate at a high speed, so that friction and abrasion are reduced, and the service life and efficiency of the rolling bearing are improved. In addition, the cage 301 may also help to distribute the lubricating oil to ensure smooth operation of the rolling bearing.

In one example, the material of the cage 301 is any one of steel, copper alloy, or plastic. It can be appreciated that, according to the specific requirements of the usage scenario of the rolling bearing, the retainer 301 made of different materials needs to be selected, so that specific working environments and working conditions can be satisfied, and the service life and performance of the rolling bearing are improved.

Taking the cage 301 made of copper alloy as an example, the cage 301 made of copper alloy has good thermal conductivity, so that heat generated by the rolling bearing can be rapidly conducted out, and the friction temperature of the rolling bearing can be reduced.

According to an embodiment of the present utility model, the dust cap 4 has a ring shape with a central hole, the number of the through holes 401 is plural, and the plural through holes 401 are arranged on the dust cap 4 around the central hole. In this embodiment, the dust cover 4 is provided with a central hole, the diameter of which is slightly larger than the outer diameter of the bearing inner ring 1, and a plurality of through holes 401 are formed in the dust cover 4, so that the dust cover 4 surrounds the central hole and is arranged on the dust cover 4, the lubrication area of the rolling bodies 3 can be increased, and the lubrication efficiency is accelerated. In addition, by providing the plurality of through holes 401, the air flow velocity in the cavity can be increased, effectively reducing the temperature of the entire rolling bearing, thereby improving the heat radiation performance.

According to one embodiment of the present utility model, the plurality of through holes 401 are arranged to form at least one annular through hole group, and the through holes 401 on each annular through hole group are arranged at intervals of 1mm-2mm. It can be understood that the plurality of through holes 401 are arranged to form at least one annular through hole group, and the through holes 401 on each annular through hole group are arranged between 1mm and 2mm at intervals, so that dense ventilation channels can be formed by the through holes 401, the air flow speed and the flow quantity are improved, and the heat dissipation performance of the rolling bearing is further enhanced. And the through holes 401 can form dense lubrication channels, which is beneficial to increasing the lubrication area of the lubricating oil to the rolling bodies 3 and accelerating the lubrication efficiency.

According to an embodiment of the present utility model, the through holes 401 on the adjacent annular through hole groups may be arranged in a one-to-one correspondence in the radial direction, or may be arranged in a staggered manner, and the radial interval is 0.5mm-1mm. Through set up the through-hole on the shield, can form more intensive ventilation passageway, can improve air flow rate and circulation of water to can take away the inside dust of antifriction bearing or foreign matter such as granule impurity, keep the inside clean and clean of antifriction bearing. And lubricating oil can be uniformly attached to the rolling 3 moving body, so that the partial damage of the rolling bearing caused by uneven lubrication is avoided.

According to one embodiment of the present utility model, the through hole 401 is a circular hole having a diameter of 0.2mm-3mm. The through-hole 401 is provided as a circular hole, and in actual production, compared to other shapes of the through-hole 401, by a conventional tool such as: the drill bit can be directly processed, thereby realizing mass production. In addition, through holes 401 with proper diameters can be selected according to different working environments, so that the possibility that large particle impurities enter the rolling bodies 3 is reduced, and the rolling bodies can be better adapted to the requirements in specific environments.

According to one embodiment of the present utility model, the through hole 401 is a non-circular hole having an area of 0.01 pi mm ² -2.25πmm ² . It will be appreciated that the shape of the through-holes 401 may also be provided as non-circular through-holes 401 such as: elliptical holes, square shapes, etc., as long as the area of the non-circular holes corresponds to the area of the circular holes (diameter 0.2-3 mm).

According to one embodiment of the utility model, the bearing outer ring 2 is provided with a mounting groove 201 for mounting the dust cover 4, one end of the dust cover 4 is detachably abutted in the mounting groove 201, and a second gap 6 is reserved between the other end of the dust cover 4 and the outer surface of the bearing inner ring 1, and the second gap 6 is 0.05mm-2mm. The dust cover 4 is detachably connected with the bearing outer ring 2, so that the dust cover 4 is convenient to maintain, replace and clean in the later period; further, the second gap 6 left between the other end of the dust cover 4 and the bearing inner ring 1 can ensure that the dust cover 4 can block large particle impurities and allow lubricating oil to pass through, and meanwhile, the relative rotation of the bearing outer ring 2 and the bearing inner ring 1 of the rolling bearing cannot be influenced.

It will be appreciated that in this embodiment, the second gap 6 left between the dust cap 4 and the bearing inner ring 1 should be smaller than the diameter of the through hole 401, so as to avoid large particle impurities entering the rolling element 3 through the gap left between the dust cap 4 and the bearing inner ring 1, causing seizing and wear of the rolling element 3. Meanwhile, a second gap 6 is reserved between the dust cover 4 and the bearing inner ring 1, so that the area of lubricating oil passing through the dust cover 4 can be increased, and the lubricating efficiency is accelerated. In addition, the second gap 6 left between the dust cover 4 and the bearing inner ring 1 can also ensure the internal air circulation of the rolling bearing, so that the heat generated in the rolling bearing can be effectively dissipated, and the normal operation of the rolling bearing is maintained.

In a specific embodiment, the dust cover 4 includes an annular dust cover 4 body, a connecting portion 402 inclined toward the direction of the cavity along the outer edge of the dust cover 4 body, and a curled edge 403 curled away from the direction of the cavity by the outer edge of the connecting portion 402, the side wall of the mounting groove 201 away from the cavity is provided as an inclined surface, the inclined surface is gradually inclined toward the direction away from the cavity from the bottom of the mounting groove 201 to the opening direction, and the curled edge 403 is located in the mounting groove 201 and abuts against the inclined surface.

In this embodiment, the curled edge 403 has elasticity, that is, by utilizing the characteristic of elasticity, makes it contact with the mounting groove 201, so as to realize the detachable connection of the dust cover 4 and the bearing outer ring 2, and facilitate the replacement and maintenance of the dust cover 4 in the later period. In addition, the curled edges 403 have elasticity, so that vibration generated in the motion process of the bearing outer ring 2 can be damped and absorbed, and the influence on the body of the dust cover 4 is reduced. Further, a connecting portion 402 inclined to the direction of the cavity is arranged between the dust cover 4 body and the curled edge 403, so that a vibration energy transmission path is increased, further, the influence of vibration of the bearing outer ring 2 on the dust cover 4 body is reduced again, and lubricating oil is uniformly covered on all rolling bodies 3 of the rolling bearing.

It should be noted that, the bearing inner race also can 4 be equipped with the installation 4 grooves of preventing 201 dirt covers, with shield one end detachably 201 butt in the installation 4 grooves, the shield other end with 2 leave the clearance between the surface of bearing outer race to realize hindering big granule impurity and allow the effect that lubricating oil passed through.

In one example, the bearing inner ring 1 is provided with a second mounting groove 201, one end of the dust cover 4, which is close to the bearing inner ring 1, is tightly attached to the inner surface of the second mounting groove 201 through a rubber gasket, and a third gap is reserved between the other end of the dust cover 4 and the outer surface of the bearing outer ring 2, wherein the third gap is 0.1mm-0.2mm. By arranging the rubber gasket, the dust cover 4 can be prevented from shaking randomly in the rolling bearing rotating process, and the relative positions of the dust cover 4, the rolling bodies 3, the bearing inner ring 1 and the bearing outer ring 2 are fixed. In addition, the rubber has good wear resistance, friction between the dust cover 4 and the bearing inner ring 1 can be reduced, deformation of the dust cover 4 or the bearing inner ring 1 is avoided, and normal operation of an engine is further affected.

According to one embodiment of the utility model, the through holes 401 are disposed towards the rolling elements 3 and are uniformly distributed on the dust cover body. The through holes 401 are arranged towards the rolling bodies 3 and are uniformly distributed on the dust cover body, so that the lubrication area of the rolling bodies 3 can be increased, the lubrication oil can be uniformly covered on all the rolling bodies 3 of the rolling bearing, and the local damage of the rolling bearing caused by uneven lubrication is avoided. And also enables air to pass through the rolling elements 3 more quickly, reducing the temperature of the rolling elements.

According to an embodiment of the present utility model, in another aspect, there is also provided an engine including: the rolling bearing is arranged in a cylinder body of the engine.

In this embodiment, the engine may be, but is not limited to, a diesel engine, a natural gas engine, a methanol engine, or the like.

The engine according to the present utility model has all the advantages of the rolling bearing described above, and is not described in detail herein.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims (10)

1. A rolling bearing, characterized by comprising:

a bearing inner ring (1);

the bearing outer ring (2) is coaxially sleeved outside the bearing inner ring (1);

a plurality of rolling bodies (3) which are arranged in a cavity between the bearing inner ring (1) and the bearing outer ring (2) at intervals;

the dustproof cover (4) is arranged on the splash lubricating oil side of the rolling bearing, a first gap (5) is reserved between the dustproof cover and the rolling body (3), and a through hole (401) communicated with the cavity is formed in the dustproof cover (4).

2. Rolling bearing according to claim 1, characterized in that the dust cap (4) has the shape of a ring with a central hole, the number of through holes (401) being a plurality, a plurality of through holes (401) being arranged on the dust cap (4) around the central hole.

3. Rolling bearing according to claim 2, wherein a plurality of said through holes (401) are arranged to form at least one annular set of through holes, the through holes (401) of each of said annular set of through holes being spaced apart and spaced apart by 1mm-2mm.

4. A rolling bearing according to claim 3, wherein the through holes (401) of adjacent annular through hole groups are arranged in one-to-one correspondence in the radial direction or staggered, and the radial interval is 0.5mm-1mm.

5. Rolling bearing according to claim 1, characterized in that the through hole (401) is a circular hole with a diameter of 0.2mm-3mm.

6. Rolling bearing according to claim 1, characterized in that the through-hole(401) Is a non-circular hole with an area of 0.01 pi mm ² -2.25πmm ² 。

7. Rolling bearing according to any one of claims 1 to 6, characterized in that the bearing outer ring (2) is provided with a mounting groove (201) for mounting the dust cover (4), one end of the dust cover (4) is detachably abutted in the mounting groove (201), a second gap (6) is left between the other end of the dust cover (4) and the outer surface of the bearing inner ring (1), and the second gap (6) is 0.05mm-2mm.

8. Rolling bearing according to claim 7, characterized in that the dust cover (4) comprises an annular dust cover body, a connecting part (402) inclined towards the direction of the cavity along the outer edge of the dust cover body and a curled edge (403) curled away from the direction of the cavity from the outer edge of the connecting part (402), the side wall of the mounting groove (201) away from the cavity is provided with an inclined surface, the inclined surface is gradually inclined towards the direction away from the cavity from the bottom of the mounting groove (201) to the opening direction, and the curled edge (403) is positioned in the mounting groove (201) and is abutted against the inclined surface.

9. Rolling bearing according to claim 8, characterized in that the through holes (401) are arranged towards the rolling bodies (3) and are evenly distributed on the dust cover (4) body.

10. An engine, comprising:

the rolling bearing according to any one of claims 1 to 9, which is provided in a cylinder block of the engine.