Cylindrical roller bearing

Abstract

The utility model discloses a cylindrical roller bearing, which belongs to the technical field of mechanical transmission, and comprises an outer ring, the inner wall of the outer ring is respectively provided with two outer raceways and two first mounting grooves, the inner part of the outer ring is provided with a placing groove, the inner part of the placing groove is provided with a lubricating oil supplementing mechanism, and the inner part of the placing groove is provided with a second mounting groove. The inner wall of the outer ring is rotatably connected with an inner ring, the outer wall of the inner ring is respectively provided with two inner raceways and two second mounting grooves, and the inner walls of the two inner raceways are both slidably connected with a plurality of cylindrical rollers. The whole bearing adopts a structure that the diameter of the top and the diameter of the bottom are larger than the diameter of the central part, so that the contact area between the bearing and the outer raceway and the contact area between the bearing and the inner raceway are increased, and loads can be more uniformly distributed on the raceways due to the larger contact area, so that the bearing capacity of the bearing is improved, larger radial loads and certain axial loads can be borne, and the service life of the bearing is prolonged. The method is suitable for heavy-load conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field, in particular to a cylindrical roller bearing. BACKGROUND

[0002] As the core supporting component in the mechanical transmission system, the cylindrical roller bearing promotes the smooth operation of numerous mechanical equipment, from heavy machinery in traditional manufacturing industry to high-end precision aerospace equipment, from household appliances in daily life to high-speed trains, the cylindrical roller bearing is everywhere, and its technical development process is closely intertwined with the industrialization process of human beings.

[0003] Compared with the traditional spherical roller bearing, the spherical roller bearing is weak in bearing axial load, and the stress concentration phenomenon at the contact point is more serious when bearing load, especially when bearing larger radial load and impact load, the problems such as ball deformation and raceway wear are prone to occur, which limits its application in heavy load working condition, and due to the point contact characteristics between the ball and the raceway, the ball bearing lacks sufficient buffering and bearing capacity when encountering impact load. Impact load can increase the contact stress between the ball and the raceway instantaneously, which can easily cause the ball to break and the raceway to appear pits, seriously affecting the performance and service life of the bearing.

[0004] Therefore, it is urgent to provide a cylindrical roller bearing to solve the above problems. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a cylindrical roller bearing.

[0006] To solve the above technical problems, one technical scheme of the utility model is to provide a cylindrical roller bearing, which comprises an outer ring, two outer raceways and two first mounting grooves are formed in the inner wall of the outer ring, a first elastic aligning ring is mounted in each of the two first mounting grooves, a placing groove is formed in the inner part of the outer ring, and a lubricating oil supplementing mechanism is arranged in the placing groove.

[0007] The inner wall of the outer ring is rotatably connected with an inner ring, two inner raceways and two second mounting grooves are formed in the outer wall of the inner ring, a second elastic aligning ring is mounted in each of the two second mounting grooves, and a plurality of cylindrical rollers are slidably connected to the inner wall of each of the two inner raceways.

[0008] The utility model is further provided as follows: the outer raceways and the inner raceways are concentrically arranged, and the contour shapes of the outer raceways and the inner raceways on the radial section are matched with each other.

[0009] By the technical scheme, the concentric arrangement and the contour adaptation can ensure that the cylindrical roller always keeps a stable rolling state between the outer raceway and the inner raceway, avoid problems such as tilting, deviation or jamming of the roller, and make the bearing run smoothly and reliably; the contact points of the roller and the outer raceway and the inner raceway can be evenly distributed in the rolling process, the pressure and friction force of each point are relatively consistent, the local excessive force can be prevented from causing early wear or fatigue failure, and the service life of the roller and the raceway is prolonged.

[0010] The utility model discloses further provide that: the lubricating oil supplementing mechanism includes the annular oil storage cavity of installing in the inside of the placing groove, the top of annular oil storage cavity is fixedly connected with the oil inlet pipe, the inner wall of oil inlet pipe is installed with the oil inlet plug, the bottom of outer ring is fixedly connected with the oil receiving groove, the oil receiving groove and annular oil storage cavity between fixedly connected with the oil delivery pipe, the bottom of outer ring is fixedly connected with the small -size oil pump corresponding with oil delivery pipe, the inner wall of annular oil storage cavity is fixedly connected with a plurality of oil drip pipes, and another end of a plurality of oil drip pipes all is installed with the oil drip head.

[0011] Through the technical scheme, the annular oil storage cavity is installed in the inside of the placing groove, as the container for storing lubricating oil, the lubricating oil can be injected into the annular oil storage cavity through the oil inlet pipe, the oil inlet plug can prevent the lubricating oil from flowing out of the oil inlet pipe when not adding oil, and sealing effect is achieved, the lubricating oil storage in the annular oil storage cavity is guaranteed, after the oil drip head drops the lubricating oil to the inside of the device, the lubricating oil falls to the inside of the oil receiving groove under the action of gravity and the device, at this moment, the small -size oil pump will start to run, and the lubricating oil in the oil receiving groove is extracted and pushed to the inner wall of the annular oil storage cavity, realizing the recycling of the lubricating oil.

[0012] The utility model discloses further provide that: the oil receiving groove is installed at the contact of the bottom of outer ring and the bottom of inner ring.

[0013] Through the technical scheme, in the bearing operation process, the lubricating oil will splash because of the rolling of the roller and the relative motion of the bearing parts. The oil receiving groove is installed at the contact of the bottom of outer ring and the bottom of inner ring, which is in the main area of the lubricating oil splash, can effectively collect these splashed oil drops, reduce the waste of lubricating oil, and improve the utilization rate of lubricating oil.

[0014] The utility model discloses further provide that: a plurality of oil drip pipes are evenly distributed on the inner wall of the outer ring.

[0015] Through the technical scheme, the roller and the raceway of the bearing need good lubrication in the circumferential direction, and the evenly distributed oil drip pipes can make the lubricating oil evenly drip on the entire inner wall of the outer ring, fully cover the contact area of the roller and the raceway of the outer ring, avoid the situation of local insufficient lubrication, ensure that the friction coefficients of all parts of the bearing are consistent, and reduce the wear difference caused by uneven lubrication.

[0016] The present invention is further configured such that the cylindrical roller is generally cylindrical, with its top and bottom having a larger diameter than the middle portion.

[0017] With the above technical solution, and the cylindrical rollers sliding between the outer and inner raceways, the larger diameters at the top and bottom of the rollers increase the contact area with the outer and inner raceways. Under load, the larger contact area distributes the load more evenly across the raceways, reducing the pressure per unit area and thus improving the bearing's load-bearing capacity. This allows the bearing to withstand greater radial loads and a certain amount of axial load, making it suitable for heavy-duty applications.

[0018] The present invention is further configured such that the outer walls of the first elastic self-aligning ring and the second elastic self-aligning ring are both attached to the outer wall of the cylindrical roller.

[0019] With the above technical solution, there may be a certain axial deviation at the bearing installation location or slight deformation during equipment operation. The first and second elastic self-aligning rings can automatically adapt to this axial deviation when the cylindrical rollers are in contact with the outer wall, thanks to their elastic properties. This allows the rollers to better match the raceway at different angles, ensuring the normal operation of the bearing and reducing local wear and stress concentration caused by axial misalignment.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model designs a cylindrical roller with a near-cylindrical shape, where the diameter of the top and bottom portions is larger than that of the center. This special structure increases the contact area with the outer and inner raceways. Under load, the larger contact area distributes the load more evenly across the raceways, reducing the pressure per unit area and thus improving the bearing's load-bearing capacity. It can withstand greater radial loads and a certain amount of axial load, making it suitable for heavy-duty applications.

[0022] 2. This utility model has elastic self-aligning rings installed on both the outer and inner rings. The first and second elastic self-aligning rings can automatically adapt to the axial deviation when the cylindrical rollers are in contact with the outer wall, thanks to their elastic properties. This allows the rollers to better match the raceway at different angles, ensuring the normal operation of the bearing and reducing local wear and stress concentration caused by axial misalignment.

[0023] 3. This utility model designs a lubricating oil replenishment mechanism that uses an oil receiving groove to collect lubricating oil that falls from the joints of the device, and then uses an oil pump to push the lubricating oil back into the annular oil storage chamber, thus realizing the recycling of lubricating oil. Workers only need to periodically check the oil level in the annular oil storage chamber, eliminating the need to frequently apply lubricating oil to the device, effectively reducing downtime due to the need to apply lubricating oil, and improving work efficiency. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present utility model;

[0025] Figure 2 This is a front view of the present invention;

[0026] Figure 3 for Figure 1 A cross-sectional view;

[0027] Figure 4 This is a schematic diagram of the outer ring structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the inner ring structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the lubricating oil replenishment mechanism of this utility model.

[0030] In the diagram: 1. Outer ring; 2. Outer raceway; 3. First mounting groove; 4. First elastic self-aligning ring; 5. Placement groove; 6. Lubricating oil replenishment mechanism; 601. Annular oil reservoir; 602. Oil inlet pipe; 603. Oil inlet plug; 604. Oil receiving groove; 605. Oil delivery pipe; 606. Small oil pump; 607. Oil dripping pipe; 608. Oil dripping nozzle; 7. Inner ring; 8. Inner raceway; 9. Second mounting groove; 10. Second elastic self-aligning ring; 11. Cylindrical roller. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0032] Please see Figure 1 - Figure 4 A cylindrical roller bearing includes an outer ring 1. The inner wall of the outer ring 1 has two outer raceways 2 and two first mounting grooves 3. A first elastic self-aligning ring 4 is installed inside each of the two first mounting grooves 3. A placement groove 5 is provided inside the outer ring 1.

[0033] like Figure 6As shown, a lubricating oil replenishment mechanism 6 is provided inside the placement groove 5. The lubricating oil replenishment mechanism 6 includes an annular oil storage chamber 601 installed inside the placement groove 5. An oil inlet pipe 602 is fixedly connected to the top of the annular oil storage chamber 601. An oil inlet plug 603 is installed on the inner wall of the oil inlet pipe 602. An oil receiving groove 604 is fixedly connected to the bottom of the outer ring 1. The oil receiving groove 604 is installed at the contact point between the bottom of the outer ring 1 and the bottom of the inner ring 7. During the operation of the bearing, the lubricating oil will splash due to the rolling of the rollers and the relative movement of the various components of the bearing. The oil receiving groove 604 is installed at the bottom contact point of the outer ring 1 and the inner ring 7, which is located in the main area of ​​lubricating oil splash. It can effectively collect these splashed oil droplets, reduce lubricating oil waste, and improve the utilization rate of lubricating oil. An oil supply pipe 605 is fixedly connected between the oil receiving groove 604 and the annular oil storage cavity 601. A small oil pump 606 corresponding to the oil supply pipe 605 is fixedly connected to the bottom of the outer ring 1. Multiple oil dripping pipes 607 are fixedly connected to the inner wall of the annular oil storage cavity 601. The multiple oil dripping pipes 607 are evenly distributed on the inner wall of the outer ring 1. The rollers and raceways of the bearing require good lubrication in the circumferential direction. The evenly distributed oil dripping pipes 607 can make the lubricating oil drip evenly on the circumference of the entire inner wall of the outer ring 1, fully covering the contact area between the rollers and the raceways of the outer ring 1, avoiding local lubrication deficiency, ensuring that the friction coefficient of each part of the bearing is consistent, and reducing wear differences caused by uneven lubrication. An oil dripping nozzle 608 is installed at the other end of each of the multiple oil dripping pipes 607.

[0034] like Figure 6 As shown, the annular oil storage chamber 601 is installed inside the placement groove 5 as a container for storing lubricating oil. Lubricating oil can be injected into the annular oil storage chamber 601 through the oil inlet pipe 602. The oil inlet plug 603 can prevent lubricating oil from flowing out of the oil inlet pipe 602 when no oil is added, thus playing a sealing role and ensuring the amount of lubricating oil stored in the annular oil storage chamber 601. When the oil dripping nozzle 608 drips lubricating oil into the device, the lubricating oil falls into the oil receiving groove 604 under the action of gravity and the device. At this time, the small oil pump 606 will start to operate, drawing the lubricating oil in the oil receiving groove 604 and pushing it to the inner wall of the annular oil storage chamber 601, realizing the recycling of lubricating oil.

[0035] like Figure 1 - Figure 3As shown, an inner ring 7 is rotatably connected to the inner wall of the outer ring 1. Two inner raceways 8 and two second mounting grooves 9 are respectively formed on the outer wall of the inner ring 7. The outer raceway 2 and the inner raceway 8 are concentrically arranged, and their radial profiles are mutually compatible. This concentric arrangement and compatible profiles ensure that the cylindrical roller maintains a stable rolling state between the outer raceway 2 and the inner raceway 8, avoiding problems such as roller skewness, offset, or jamming. This ensures smooth and reliable bearing operation, and the contact points between the roller and the outer raceway 2 and inner raceway 8 are evenly distributed during rolling, minimizing the pressure and friction at each point. The friction is relatively uniform, which can prevent excessive local stress from causing premature wear or fatigue failure and extend the service life of the rollers and raceways. The interior of the two second mounting grooves 9 is equipped with second elastic self-aligning rings 10. The inner walls of the two inner raceways 8 are slidably connected with multiple cylindrical rollers 11. The cylindrical rollers 11 are generally cylindrical, with their top and bottom diameters being larger than their middle portions. The cylindrical rollers 11 are installed and slid between the outer raceway 2 and the inner raceway 8. The larger diameters of the top and bottom of the rollers increase their contact area with the outer raceway 2 and the inner raceway 8. When bearing loads, a larger contact area can distribute the load more evenly on the raceway, reducing the pressure per unit area and thus improving the bearing's load-bearing capacity. It can withstand greater radial loads and a certain amount of axial loads, making it suitable for heavy-duty applications. The outer walls of the first elastic self-aligning ring 4 and the second elastic self-aligning ring 10 are both in contact with the outer wall of the cylindrical roller 11. There may be a certain axial deviation at the bearing mounting location or slight deformation during equipment operation. The first elastic self-aligning ring 4 and the second elastic self-aligning ring 10 can automatically adapt to this axial deviation when the outer walls of the cylindrical roller 11 are in contact with each other, so that the rollers can better match the raceway at different angles, ensuring the normal operation of the bearing and reducing local wear and stress concentration caused by axial misalignment.

[0036] In use, after the installation of the device is completed, when the device is in operation, the inner ring 7 connects with the connecting member and rotates together with the connecting member. Driven by the inner ring 7, the cylindrical roller 11 performs stable rolling motion between the outer raceway 2 and the inner raceway 8, thereby realizing the basic rotational function of the bearing. The connecting member can rotate smoothly relative to the outer ring 1. When a radial load is applied to the bearing, the load is transmitted to the inner ring 7 through the connecting member. The inner ring 7 then transmits the load to the cylindrical roller 11, which contacts its outer wall and inner raceway 8. Because the diameter of the top and bottom of the cylindrical roller 11 is larger than that in the middle, the contact area with the outer raceway 2 and the inner raceway 8 is increased, allowing the load to be distributed more evenly on the raceways, reducing the pressure per unit area. The load is then transferred from the rollers to the outer raceway 2 of the outer ring 1, and finally to the bearing housing and other components, thus effectively bearing the radial load. The first elastic self-aligning ring 4 and the second elastic self-aligning ring 10 can make the cylindrical roller 11 adapt to the deviation. When the device is working, the internal lubricating oil replenishment mechanism 6 will also assist it by periodically dripping lubricating oil into the device. The lubricating oil falls into the oil receiving groove 604 under the action of gravity and the device. At this time, the small oil pump 606 will start to operate, drawing the lubricating oil in the oil receiving groove 604 and pushing it to the inner wall of the annular oil storage chamber 601 to realize the recycling of lubricating oil. The staff only needs to check the oil level in the annular oil storage chamber 601 periodically and replenish it in time.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cylindrical roller bearing comprising an outer ring (1), characterized in that: The inner wall of the outer ring (1) is provided with two outer raceways (2) and two first mounting grooves (3), respectively, and the first mounting grooves (3) are internally provided with first elastic aligning rings (4). The inner wall of the outer ring (1) is provided with two outer raceways (2) and two first mounting grooves (3), respectively, and the first mounting grooves (3) are internally provided with first elastic aligning rings (4).

2. A cylindrical roller bearing according to claim 1, characterized in that: The outer raceways (2) and the inner raceways (8) are concentrically arranged, and the profile shapes of the outer raceways (2) and the inner raceways (8) in the radial section are matched with each other.

3. A cylindrical roller bearing according to claim 1, characterized in that: The lubricating oil supplementing mechanism (6) comprises an annular oil storage cavity (601) mounted in the placing groove (5), an oil inlet pipe (602) fixedly connected to the top of the annular oil storage cavity (601), an oil inlet plug (603) mounted on the inner wall of the oil inlet pipe (602), an oil receiving groove (604) fixedly connected to the bottom of the outer ring (1), an oil conveying pipe (605) fixedly connected between the oil receiving groove (604) and the annular oil storage cavity (601), a small oil pump (606) fixedly connected to the bottom of the outer ring (1) and corresponding to the oil conveying pipe (605), and a plurality of oil dripping pipes (607) fixedly connected to the inner wall of the annular oil storage cavity (601), wherein the other ends of the oil dripping pipes (607) are provided with oil dripping nozzles (608).

4. A cylindrical roller bearing according to claim 3, characterized in that: The oil receiving groove (604) is mounted at the contact between the bottom of the outer ring (1) and the bottom of the inner ring (7).

5. A cylindrical roller bearing according to claim 3, characterized in that: The oil dripping pipes (607) are uniformly distributed on the inner wall of the outer ring (1).

6. A cylindrical roller bearing according to claim 1, characterized in that: The cylindrical rollers (11) are in a cylindrical shape as a whole, the top and the bottom of the cylindrical rollers (11) are larger in diameter than the middle part, and the cylindrical rollers (11) are slidably mounted between the outer raceways (2) and the inner raceways (8).

7. A cylindrical roller bearing according to claim 6, characterized in that: The outer walls of the first elastic aligning rings (4) and the second elastic aligning rings (10) are attached to the outer walls of the cylindrical rollers (11). The outer walls of the first elastic aligning rings (4) and the second elastic aligning rings (10) are attached to the outer walls of the cylindrical rollers (11).

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