High-speed lubrication cylindrical roller bearing

Abstract

The utility model discloses a high-speed lubrication cylindrical roller bearing which comprises an outer ring, an inner ring and a plurality of rollers, a rolling cavity is formed between the outer ring and the inner ring, the plurality of rollers are movably arranged in the rolling cavity, flanges are arranged at two ends of the outer peripheral wall of the inner ring, and the inner side walls of the two flanges and the outer peripheral wall of the inner ring are combined to form a roller path for the rollers to roll. Oil grooves are formed in the connecting positions of the inner side walls of the two flanges and the outer circumferential wall of the inner ring, a plurality of oil inlet holes are annularly formed in the inner ring, every two oil inlet holes are formed in the two ends of the inner ring respectively, the starting ends of the oil inlet holes communicate with the oil grooves, and the tail ends of the oil inlet holes communicate to the inner circumferential wall of the inner ring; the starting ends of the oil outlet holes communicate with the outer circumferential wall of the inner ring and communicate with the rolling cavity, and the tail ends of the oil outlet holes communicate with the inner circumferential wall of the inner ring. The problems that in the prior art, when the bearing runs at a high speed, an external oil injection tool is difficult to inject lubricating grease into the bearing, so that the bearing lacks oil, and the running efficiency of the bearing is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a high-speed lubricating cylindrical roller bearing. Background Art

[0002] At present, most bearings are matched with the mandrel in the tooling, and the mandrel and the inner ring shaft hole of the bearing are plugged in to meet the transmission relationship. In the prior art, an oil injection pipeline is arranged on the side of the mandrel shaft to spray oil to the outer peripheral wall of the mandrel and the inside of the bearing when the mandrel runs at high speed and the bearing runs at high speed, respectively. In this way, the lubricating grease is applied to the outer peripheral wall of the mandrel by spraying and the lubricating grease is sprayed into the inside of the bearing, thereby ensuring that when the mandrel runs at high speed, there will be no dry rotation or increased friction resistance between the outer peripheral wall and the inner peripheral wall of the inner ring due to lack of lubricating grease, thereby avoiding the operation efficiency of the mandrel and the operation of the bearing. The efficiency is affected, and grease is sprayed into the bearing to ensure that the rollers and raceways inside the bearing do not run dry due to lack of grease, thereby avoiding affecting the bearing operation efficiency. However, in the prior art, due to the high-speed operation of the bearing, it is difficult for most of the grease to enter the rolling cavity through the gap between the outer ring and the inner ring of the bearing, and it is difficult to replenish the grease inside the bearing. The bearing will run dry due to lack of lubricating grease when running at high speed, which will affect the bearing operation efficiency. The bearing may even be damaged and fail if the lubricating grease is not replenished for a long time. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a high-speed lubricated cylindrical roller bearing to solve the problem in the prior art that when the bearing is running at high speed, it is difficult for the external oil spraying tool to spray lubricating grease into the inside of the bearing, resulting in oil shortage in the bearing and affecting the bearing operation efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides a high-speed lubricated cylindrical roller bearing, including an outer ring, an inner ring and a plurality of rollers, a rolling cavity is formed between the outer ring and the inner ring, and the plurality of rollers are movably arranged in the rolling cavity, both ends of the outer circumferential wall of the inner ring are provided with ribs, the inner side walls of the two ribs and the outer circumferential wall of the inner ring are combined to form a rolling track for the rollers to roll, and oil grooves are provided at the connection between the inner side walls of the two ribs and the outer circumferential wall of the inner ring, a plurality of oil inlet holes are circumferentially provided on the inner ring, and the plurality of oil inlet holes are arranged in groups of two at both ends of the inner ring, the starting end of the oil inlet hole is connected to the oil groove, and the terminal end of the oil inlet hole is connected to the inner circumferential wall of the inner ring, and a plurality of oil outlet holes are circumferentially provided on the inner ring, the starting end of the oil outlet hole is connected to the outer circumferential wall of the inner ring and is connected to the rolling cavity, and the terminal end of the oil outlet hole is connected to the inner circumferential wall of the inner ring.

[0005] The advantages of adopting the above technical scheme are as follows: when the bearing and the spindle are running at high speed, the oil injection device on the circumference of the spindle will spray lubricating grease onto the outer peripheral wall of the spindle to avoid dry rotation or increased friction resistance due to lack of oil at the mating point between the spindle and the bearing; when there is a large amount of lubricating grease on the outer peripheral wall of the spindle and the bearing is running at high speed, due to the high-speed rotation of the inner ring of the bearing, part of the lubricating grease on the outer peripheral wall of the spindle can flow into a number of oil inlet holes and a number of oil outlet holes respectively, and the lubricating grease passing through the oil inlet hole is affected by the high-speed running inner ring so that the lubricating grease in the oil inlet hole flows into the oil groove, thereby realizing the replenishment of the lubricating grease in the oil groove, and the oil groove is connected with the raceway, so that the lubricating grease can be replenished into the raceway, and then when the roller rolls in the raceway, the outer peripheral wall of the roller can contact with the lubricating grease to realize the coating of the lubricating grease on the roller surface, thereby realizing the roller The grease in the oil outlet hole is affected by the inner ring running at high speed, so that the grease in the oil outlet hole flows into the rolling cavity, thereby replenishing the grease inside the bearing. The grease in the rolling cavity is applied to the roller and the retaining frame and between the outer ring and the inner ring, thereby replenishing the grease inside the bearing, and avoiding the dry running of the rolling cavity due to lack of oil when the bearing runs at high speed; in the above technology, double oil replenishment is performed on the raceway and the rolling cavity, so as to ensure that the bearing will not run dry due to lack of oil when the bearing runs at high speed, thereby avoiding the bearing running speed being affected, and avoiding the bearing being damaged, scrapped or even failing due to long-term dry running; at the same time, in the above technology, when there is too much grease in the raceway or too much grease in the rolling cavity, part of the grease will flow back through the oil outlet hole to the core shaft, thereby realizing the circulation of the entire oil circuit.

[0006] The utility model is further arranged that: the position of each of the oil inlet holes is staggered with the positions of the respective adjacent oil inlet holes.

[0007] The benefit of adopting the above technical solution is that the positions of the oil inlet holes in the above technology are staggered with the positions of their adjacent oil inlet holes, that is, the two oil inlet holes in the same group are arranged at both ends of the inner ring and the positions of the two oil inlet holes on the inner ring are different, so as to ensure that when the bearing runs at high speed, the lubricating grease can flow into the raceway at different angles of the inner ring through different oil inlet holes, thereby increasing the flow path of the lubricating grease, thereby improving the lubrication efficiency and lubrication range.

[0008] The utility model is further configured that: each of the oil inlet holes is obliquely opened on the inner ring.

[0009] The advantages of adopting the above technical solution are as follows: in the above technology, the oil inlet hole is obliquely opened on the inner ring so that the lubricating grease can flow into the raceway better, thereby achieving efficient oil replenishment to the raceway.

[0010] The utility model further arranges that: each of the oil inlet holes is distributed on the inner ring at 180 degrees along the inner ring axis direction with the oil inlet holes of the same group, and the inclination direction of each of the oil inlet holes is arranged opposite to the inclination direction of the oil inlet holes relative to each other.

[0011] The benefits of adopting the above technical solution are: each oil inlet hole in the above technology is distributed on the inner ring at 180 degrees along the axis of the inner ring with the oil inlet holes in the same group, so as to ensure that when the bearing runs at high speed, the lubricating grease can flow into the raceway at different angles of the inner ring through different oil inlet holes, thereby increasing the flow path of the lubricating grease, thereby improving the lubrication efficiency and lubrication range. At the same time, the inclination direction of each oil inlet hole is set opposite to the inclination direction of the respective relative oil inlet holes, so as to ensure that when the bearing runs at high speed, the lubricating grease can flow to the raceway at different angles, thereby increasing the flow direction of the lubricating grease, thereby improving the lubrication efficiency and lubrication range.

[0012] The utility model is further provided that: the axis of the oil inlet hole is relatively inclined to the horizontal plane of the inner side wall of the retaining edge, and the inclination angle is 25 degrees.

[0013] The benefit of adopting the above technical solution is that: in the above technology, the axis of the oil inlet hole is relatively inclined to the horizontal plane of the inner wall of the retaining edge and the inclination angle is 25 degrees, thereby improving the efficiency and amount of grease flowing into the oil inlet hole.

[0014] The utility model further arranges that: a plurality of the oil outlet holes are arranged in groups of two at both ends of the inner ring, a plurality of the oil outlet holes are distributed at intervals along the axis direction of the inner ring, and an oil inlet hole is distributed between every two oil outlet holes on the same side.

[0015] The benefits of adopting the above technical solution are: in the above technology, the oil outlet holes are arranged in groups of two at both ends of the inner ring, and the multiple oil outlet holes are spaced apart along the axial direction of the inner ring and an oil inlet hole is distributed between every two oil outlet holes on the same side, that is, an oil inlet hole is distributed between every two oil outlet holes, thereby separating the position of the oil outlet hole from the position of the oil inlet hole, thereby meeting the oil circuit circulation conditions, and at the same time increasing the path and range of the lubricating grease entering the raceway or rolling cavity, thereby improving the efficiency of lubricating grease replenishment.

[0016] The utility model is further configured that: each of the oil outlet holes is distributed on the inner ring at 180 degrees along the axis direction of the inner ring with the oil outlet holes in the same group.

[0017] The benefit of adopting the above technical solution is that each oil outlet hole in the above technology is distributed on the inner ring at 180 degrees along the axis of the inner ring with the oil outlet holes in the same group, thereby ensuring that when the bearing runs at high speed, the lubricating grease can flow into the rolling cavity at different angles of the inner ring through different oil outlet holes, thereby increasing the flow path of the lubricating grease, thereby improving the lubrication efficiency and lubrication range.

[0018] The utility model is further provided with: a retaining frame is arranged in the rolling cavity, a plurality of pockets for accommodating rollers are opened on the retaining frame, retaining rings are bent toward the outer peripheral wall of the inner ring at both ends of the retaining frame, the inner peripheral wall of the retaining ring and the outer peripheral wall of the inner ring are gap-fitted and an oil groove is formed, the opening of the starting end of the oil outlet hole is arranged toward the inner peripheral wall of the retaining ring and the starting end of the oil outlet hole is connected to the oil groove.

[0019] The benefit of adopting the above technical solution is that an oil groove is formed between the retaining ring and the inner ring in the above technology to avoid limiting the flow range of the lubricating grease entering the rolling cavity, thereby avoiding the phenomenon of excessive grease being thrown or leaked in the rolling cavity, thereby avoiding excessive grease loss and affecting the bearing operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view of the utility model;

[0021] Figure 2 for Figure 1 Sectional view along line AA;

[0022] Figure 3 for Figure 1 Cross-sectional view along line BB. DETAILED DESCRIPTION

[0023] The utility model provides a high-speed lubricating cylindrical roller bearing 11, comprising an outer ring 1, an inner ring 2 and a plurality of rollers 11, a rolling cavity 12 is formed between the outer ring 1 and the inner ring 2, a plurality of rollers 11 are movably arranged in the rolling cavity 12, ribs 21 are arranged at both ends of the outer peripheral wall of the inner ring 2, the inner side walls of the two ribs 21 are combined with the outer peripheral wall of the inner ring 2 to form a raceway 22 for the rollers 11 to roll, oil grooves 23 are arranged at the connection between the inner side walls of the two ribs 21 and the outer peripheral wall of the inner ring 2, and a plurality of rollers 11 are circumferentially arranged on the inner ring 2. The inner ring 2 is provided with a plurality of oil inlet holes 3, wherein the oil inlet holes 3 are arranged in pairs at both ends of the inner ring 2, wherein the starting end of the oil inlet hole 3 is connected to the oil groove 23, and the end of the oil inlet hole 3 is connected to the inner peripheral wall of the inner ring 2. The inner ring 2 is provided with a plurality of oil outlet holes 4 in an annular direction, wherein the starting end of the oil outlet hole 4 is connected to the outer peripheral wall of the inner ring 2 and is connected to the rolling cavity 12, and the end of the oil outlet hole 4 is connected to the inner peripheral wall of the inner ring 2. The position of each of the oil inlet holes 3 is staggered with the position of each adjacent oil inlet hole 3, and each of the oil inlet holes 3 is inclinedly opened at the inner On the inner ring 2, each of the oil inlet holes 3 is distributed on the inner ring 2 at 180 degrees with the oil inlet holes 3 in the same group along the axis direction of the inner ring 2, and the inclination direction of each of the oil inlet holes 3 is set opposite to the inclination direction of the oil inlet holes 3 relative to each other. The axis of the oil inlet hole 3 is relatively inclined to the horizontal plane of the inner wall of the retaining edge 21, and the inclination angle is 25 degrees. A plurality of the oil outlet holes 4 are arranged in groups of two at both ends of the inner ring 2, and a plurality of the oil outlet holes 4 are distributed at intervals along the axis direction of the inner ring 2, and an oil inlet hole 3 is distributed between every two oil outlet holes 4 on the same side. Each of the oil outlet holes 4 is distributed on the inner ring 2 at 180 degrees along the axial direction of the inner ring 2 with the oil outlet holes 4 of the same group. A retaining frame 5 is arranged in the rolling cavity 12. The retaining frame 5 is provided with a plurality of pockets for accommodating the rollers 11. Both ends of the retaining frame 5 are bent toward the outer circumferential wall of the inner ring 2 to form a retaining ring 51. The inner circumferential wall of the retaining ring 51 is gap-fitted with the outer circumferential wall of the inner ring 2 to form an oil groove 52. The opening at the starting end of the oil outlet hole 4 is arranged toward the inner circumferential wall of the retaining ring 51, and the starting end of the oil outlet hole 4 is connected to the oil groove 52.

[0024] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A high-speed lubricating cylindrical roller bearing, comprising an outer ring, an inner ring and a plurality of rollers, wherein a rolling cavity is formed between the outer ring and the inner ring, and the plurality of rollers are movably arranged in the rolling cavity, characterized in that: Both ends of the outer circumferential wall of the inner ring are provided with ribs, and the two inner side walls of the ribs are combined with the outer circumferential wall of the inner ring to form a raceway for rollers to roll on, and the connection between the two inner side walls of the ribs and the outer circumferential wall of the inner ring is provided with oil grooves, and a plurality of oil inlet holes are circumferentially provided on the inner ring, and the plurality of oil inlet holes are arranged in groups of two at both ends of the inner ring, and the starting end of the oil inlet hole is connected to the oil groove, and the terminal end of the oil inlet hole is connected to the inner circumferential wall of the inner ring, and a plurality of oil outlet holes are circumferentially provided on the inner ring, and the starting end of the oil outlet hole is connected to the outer circumferential wall of the inner ring and is connected to the rolling cavity, and the terminal end of the oil outlet hole is connected to the inner circumferential wall of the inner ring.

2. A high-speed lubricating cylindrical roller bearing according to claim 1, characterized in that: The position of each of the oil inlet holes is staggered with the positions of the respective adjacent oil inlet holes.

3. A high-speed lubricating cylindrical roller bearing according to claim 2, characterized in that: Each of the oil inlet holes is obliquely opened on the inner ring.

4. A high-speed lubricating cylindrical roller bearing according to claim 3, characterized in that: Each of the oil inlet holes is distributed on the inner ring at 180 degrees from the oil inlet holes in the same group along the inner ring axis direction, and the inclination direction of each of the oil inlet holes is arranged opposite to the inclination direction of the oil inlet holes relative to each other.

5. A high-speed lubricating cylindrical roller bearing according to claim 3, characterized in that: The axis of the oil inlet hole is inclined relative to the horizontal plane of the inner wall of the retaining edge, and the inclination angle is 25 degrees.

6. A high-speed lubricating cylindrical roller bearing according to claim 1, characterized in that: The plurality of oil outlet holes are arranged in groups of two at both ends of the inner ring, and the plurality of oil outlet holes are distributed at intervals along the axis direction of the inner ring, and an oil inlet hole is distributed between every two oil outlet holes on the same side.

7. A high-speed lubricating cylindrical roller bearing according to claim 6, characterized in that: Each of the oil outlet holes is distributed on the inner ring at 180 degrees along the axis of the inner ring with respect to the oil outlet holes in the same group.

8. The high-speed lubricating cylindrical roller bearing according to claim 1, characterized in that: A retaining frame is arranged in the rolling cavity, and a plurality of pockets for accommodating rollers are opened on the retaining frame. Both ends of the retaining frame are provided with retaining rings bent toward the outer peripheral wall of the inner ring. The inner peripheral wall of the retaining ring and the outer peripheral wall of the inner ring are gap-fitted and an oil groove is formed. The opening of the starting end of the oil outlet hole is arranged toward the inner peripheral wall of the retaining ring, and the starting end of the oil outlet hole is connected to the oil groove.

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