Split type stamping outer ring eccentric needle bearing

Abstract

The utility model discloses a split type stamping outer ring eccentric needle roller bearing which comprises an inner ring, an outer ring, a retainer and a plurality of needle rollers, the inner ring is an eccentric inner ring, the eccentric inner ring is detachably connected with the outer ring, the outer ring is provided with an outer ring arc wall and a limiting wall, the limiting wall is matched with the end, facing the limiting wall, of the eccentric inner ring in a limiting mode, and the needle rollers are arranged on the retainer. A groove is formed between the limiting wall and the arc wall of the outer ring, the eccentric inner ring is partially contained in the groove, the eccentric inner ring of the bearing is convenient to disassemble and assemble, can be matched with the outer ring for limiting, and is small in friction torque and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a separable stamped outer ring eccentric needle roller bearing. Background Art

[0002] The eccentric needle roller bearing is a specially designed bearing that allows the inner ring of the bearing to have an eccentric structure to meet the working conditions. The existing eccentric needle roller bearings on the market include a stamped outer ring, an eccentric inner ring, a gasket, a needle roller and a cage. Several needle rollers are sequentially installed in each pocket of the cage and placed between the stamped outer ring and the eccentric inner ring. When the bearing rotates, friction will occur on the contact surface between the inner ring and the outer ring, which will easily affect the rotation speed and service life of the bearing. The existing eccentric needle roller bearings of this type generally form an integral whole after assembly, and the inner ring and outer ring are not easy to separate. The inner ring is affected by the position of the gasket in the bearing and is not easy to disassemble and assemble. In addition, the existing eccentric needle roller bearings of this type have a complicated assembly process, require more parts, are inconvenient to disassemble and assemble the inner ring and outer ring, and have a large friction torque, which will easily affect the service life of the bearing. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a separable stamped outer ring eccentric needle roller bearing, the eccentric inner ring of which is easy to disassemble and assemble, can cooperate with the outer ring for limiting, has small friction torque and long service life.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a separable stamped outer ring eccentric needle roller bearing, including an inner ring, an outer ring, a retaining frame and a plurality of needle rollers, the inner ring is an eccentric inner ring, the eccentric inner ring and the outer ring are detachably connected, the outer ring is provided with an outer ring arc wall and a limiting wall, the limiting wall is limitedly matched with one end of the eccentric inner ring facing the limiting wall, a groove is formed between the limiting wall and the outer ring arc wall, and the eccentric inner ring is partially accommodated in the groove.

[0005] The effect that can be produced by adopting the above technical scheme is: the traditional stamped outer ring eccentric needle roller bearing is an integrated type, and its eccentric inner ring and outer ring are assembled into one body, which is not easy to disassemble and assemble. The present scheme adopts a detachably connected eccentric inner ring and outer ring to simplify the installation and maintenance process of the bearing, and is convenient for replacement or repair. The arc wall and the limit wall of the outer ring provide structural support and stability. At the same time, the limit wall ensures the precise position of the eccentric inner ring in the bearing. When installing the eccentric inner ring, the eccentric inner ring can cooperate with the limit wall to prevent the eccentric inner ring from escaping from the bearing, thereby improving stability. The provision of a groove can provide a local accommodation space for the eccentric inner ring, which helps to reduce the friction between the inner ring and the outer ring, improve the service life of the bearing, and also reduce The maintenance cost of the bearing. When assembling the bearing, first place the outer ring horizontally on the platform, and install the retaining frame and needle roller into the outer ring. After completing the above installation steps, the traditional bearing needs to install the eccentric inner ring and gasket in the bearing together, so that the eccentric inner ring, gasket, retaining frame, needle roller and outer ring are integrated. In this solution, after installing the retaining frame and needle roller, technical personnel in this field can directly place the eccentric inner ring into the bearing so that the eccentric inner ring can contact the outer peripheral wall of the needle roller. At this time, one end of the eccentric inner ring can be restrained and limited by the limiting wall on the outer ring. The eccentric inner ring is not easy to fall out of the bearing. When the eccentric inner ring needs to be removed, the eccentric inner ring can be pulled out of the bearing. It is easy to disassemble and assemble, with a simple structure, small friction torque and long service life.

[0006] The utility model is further configured that: an inclined wall is provided between the groove and the limiting wall, the inclined wall is inclined in the direction of the limiting wall toward the groove, and the inclined wall is in line contact with the eccentric inner ring.

[0007] The effect that can be produced by adopting the above-mentioned technical scheme is: an inclined wall is set between the groove and the limiting wall, wherein the inclined wall is inclined toward the groove direction and is in line contact with the eccentric inner ring, so that the contact surface between the eccentric inner ring and the outer ring can be reduced. The area of ​​line contact is smaller than that of surface contact, which can reduce friction and reduce energy consumption during bearing operation, and can also reduce wear between the inner ring and the inclined wall, thereby extending the service life of the bearing. The inclination angle and length of the inclined wall can be set according to the needs of technical personnel in this field. When the inclination angle and length of the inclined wall can make the contact surface between the outer ring and the eccentric inner ring in line contact, the eccentric inner ring and the outer ring can be in line contact, and the setting of the inclined wall can prevent grease from seeping out of the groove when there is grease in the groove, and the structure is simple.

[0008] The utility model is further provided that: the outer ring is extended to be provided with a convex edge corresponding to the position of the retaining frame and is used to limit the position of the retaining frame.

[0009] The effect that can be produced by adopting the above technical solution is: by extending a convex edge for limiting the cage at the position corresponding to the cage on the outer ring, the convex edge can effectively limit the position of the cage during the operation of the bearing, reduce the vibration and displacement of the cage, thereby improving the overall stability of the bearing, and the stable position of the cage is conducive to the uniform distribution of the lubricating oil, thereby improving the lubrication effect of the bearing, reducing the wear of the rolling elements and bearing components, and increasing the service life of the bearing.

[0010] The utility model is further configured that: an inner peripheral wall of the eccentric inner ring is provided with an inclined annular arc wall toward the end surfaces at both ends of the eccentric inner ring.

[0011] The effect that can be produced by adopting the above-mentioned technical scheme is: since the eccentric inner ring in this scheme can be easily disassembled and assembled, an inclined annular arc wall is set on the end faces of both ends of the eccentric inner ring. During disassembly and assembly, the disassembly and assembly equipment can more easily remove the eccentric inner ring through the inclined annular arc wall. The eccentric inner ring with the inclined annular arc wall is easier to disassemble and assemble than the existing eccentric inner ring without the inclined annular arc wall, thereby improving the disassembly and assembly efficiency.

[0012] The utility model is further provided that: the outer peripheral wall of the inner ring and the inner peripheral wall of the outer ring are in rolling cooperation with the outer peripheral wall of the needle roller.

[0013] The above technical solution can produce the following effects: the rolling fit between the inner ring outer wall, the outer ring inner wall and the needle roller outer wall can improve the bearing capacity of the bearing, and rolling contact is more conducive to reducing wear than sliding contact, thereby extending the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of an embodiment of the utility model;

[0015] Figure 2 It is an enlarged view of the local structure of the embodiment of the utility model;

[0016] Figure 3 It is a three-dimensional diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The utility model discloses a separable stamped outer ring eccentric needle roller bearing embodiment as shown in the figure, comprising an inner ring, an outer ring 2, a retaining frame 4 and a plurality of needle rollers 3, wherein the inner ring is an eccentric inner ring 1, and the eccentric inner ring 1 is detachably connected to the outer ring 2, and the outer ring 2 is provided with an outer ring arc wall 5 and a limiting wall 6, wherein the limiting wall 6 is limitedly matched with one end of the eccentric inner ring 1 facing the limiting wall 6, and a groove 7 is formed between the limiting wall 6 and the outer ring arc wall 5, and the eccentric inner ring 1 is partially accommodated in the groove 7. The conventional stamped outer ring 2 eccentric needle roller 3 bearing is an integrated type, wherein the eccentric inner ring 1 and the outer ring 2 are integrated after being assembled, and are not easy to be disassembled and assembled. The present scheme adopts a detachably connected eccentric inner ring 1 and the outer ring 2 to simplify the shaft The installation and maintenance process of the bearing is convenient for replacement or repair. The arc wall and the limiting wall 6 of the outer ring 2 provide structural support and stability. At the same time, the limiting wall 6 ensures the precise position of the eccentric inner ring 1 in the bearing. When installing the eccentric inner ring 1, the eccentric inner ring 1 can cooperate with the limiting wall 6 to prevent the eccentric inner ring 1 from escaping from the bearing, thereby improving stability. The groove 7 is provided to provide a local accommodation space for the eccentric inner ring 1, which helps to reduce the friction between the inner ring and the outer ring 2, improve the service life of the bearing, and reduce the maintenance cost of the bearing. When assembling the bearing, first place the outer ring 2 horizontally on the platform, and install the retaining frame 4 and the needle roller 3 into the outer ring 2. After completing the above installation steps, the traditional bearing needs to place the eccentric inner ring 1 in the horizontal position. The inner ring 1 and the gasket are installed in the bearing together, so that the eccentric inner ring 1, the gasket, the retainer 4, the needle roller 3, and the outer ring 2 become one. In this solution, after installing the retainer 4 and the needle roller 3, the technicians in this field can directly put the eccentric inner ring 1 into the bearing so that the eccentric inner ring 1 can contact the outer peripheral wall of the needle roller 3. At this time, one end of the eccentric inner ring 1 can be restrained against the limiting wall 6 on the outer ring 2, and the eccentric inner ring 1 is not easy to fall out of the bearing. When the eccentric inner ring 1 needs to be removed, the eccentric inner ring 1 can be pulled out of the bearing; there is an inclined wall 8 between the groove 7 and the limiting wall 6, and the inclined wall 8 is inclined in the direction of the limiting wall 6 toward the groove 7, and the inclined wall 8 is in linear contact with the eccentric inner ring 1 , an inclined wall 8 is arranged between the groove 7 and the limiting wall 6, wherein the inclined wall 8 is inclined toward the groove 7 and is in line contact with the eccentric inner ring 1, so that the contact surface between the eccentric inner ring 1 and the outer ring 2 can be reduced. The area of ​​the line contact is smaller than that of the surface contact, which can reduce the friction and reduce the energy consumption during the operation of the bearing, and can also reduce the wear between the inner ring and the inclined wall 8. The inclination angle and length of the inclined wall 8 can be set according to the needs of those skilled in the art. When the inclination angle and length of the inclined wall 8 can make the contact surface between the outer ring 2 and the eccentric inner ring 1 in line contact, the eccentric inner ring 1 and the outer ring 2 can be in line contact, and the setting of the inclined wall 8 can prevent grease from seeping out of the groove 7 when there is grease in the groove 7;The outer ring 2 is extended to correspond to the position of the retainer 4 and is provided with a convex edge 9 for limiting the retainer 4. The convex edge 9 for limiting the retainer 4 is extended to correspond to the position of the retainer 4 on the outer ring 2, so that the convex edge 9 can effectively limit the position of the retainer 4 during the operation of the bearing, reduce the vibration and displacement of the retainer 4, and the stable position of the retainer 4 is conducive to the uniform distribution of the lubricating oil, thereby improving the lubrication effect of the bearing. The conventional processing method of the outer ring 2 of the bearing with the convex edge 9 is generally to first heat treat the convex edge 9, then anneal to reduce the hardness, and finally bend it. The processing process of this method is complicated, and the strength of the processed part is low. However, in this scheme, the convex edge 9 is first bent to the corresponding position and then heat treated during processing, so that the strength of the convex edge 9 is greater, so that Longer service life; the inner circumferential wall of the eccentric inner ring 1 is provided with an inclined annular arc wall 10 towards the end faces of both ends of the eccentric inner ring 1. Since the eccentric inner ring 1 in this solution can be easily disassembled, an inclined annular arc wall 10 is provided on the end faces of both ends of the eccentric inner ring 1. During disassembly, the disassembly equipment can more easily remove the eccentric inner ring 1 through the inclined annular arc wall 10. The eccentric inner ring 1 with the inclined annular arc wall 10 is easier to disassemble than the existing eccentric inner ring 1 without the inclined annular arc wall 10; the outer circumferential wall of the inner ring rolls with the inner circumferential wall of the outer ring 2 and the outer circumferential wall of the needle roller 3, and the outer circumferential wall of the inner ring rolls with the inner circumferential wall of the outer ring 2 and the outer circumferential wall of the needle roller 3 to improve the bearing capacity of the bearing. Rolling contact is more conducive to reducing wear than sliding contact, and prolonging the service life of the bearing. ;

[0018] 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 separable stamped outer ring eccentric needle roller bearing, comprising an inner ring, an outer ring, a cage and a plurality of needle rollers, characterized in that: The inner ring is an eccentric inner ring, which is detachably connected to the outer ring. The outer ring is provided with an outer ring arc wall and a limiting wall. The limiting wall is limitedly matched with one end of the eccentric inner ring facing the limiting wall. A groove is formed between the limiting wall and the outer ring arc wall, and the eccentric inner ring is partially accommodated in the groove.

2. A separable stamped outer ring eccentric needle roller bearing according to claim 1, characterized in that: An inclined wall is provided between the groove and the limiting wall. The inclined wall is inclined in the direction of the limiting wall toward the groove, and the inclined wall is in line contact with the eccentric inner ring.

3. The separable stamped outer ring eccentric needle roller bearing according to claim 1, characterized in that: The outer ring is extended to a position corresponding to the retaining frame and is provided with a convex edge for limiting the retaining frame.

4. The separable stamped outer ring eccentric needle roller bearing according to claim 1, characterized in that: The inner peripheral wall of the eccentric inner ring is provided with an inclined annular arc wall towards the end surfaces at both ends of the eccentric inner ring.

5. The separable stamped outer ring eccentric needle roller bearing according to claim 1, characterized in that: The outer peripheral wall of the inner ring is in rolling cooperation with the inner peripheral wall of the outer ring and the outer peripheral wall of the needle roller.

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