CN206617432U - A joint bearing structure - Google Patents

Abstract

The utility model discloses a joint bearing structure, it includes: an outer race with a spherical inner surface; an inner ring having a spherical outer surface and received in the outer ring, the outer surface having a plurality of pockets arranged therein for storing lubricating oil and absorbing abrasive particles; the outer lane with the inside and outside surface of inner circle all is equipped with annular lubrication groove, annular lubrication groove's width is progressively increased by tank bottom to groove outside direction, the utility model discloses a current little texture technique is processed joint bearing's inner circle surface, forms a plurality of caves that have certain diameter, degree of depth, interval and area occupancy, can reach and store the lubricated thing and improve joint bearing lubricating property, absorb the utility of small grit reducing wear, improves joint bearing's life on the whole greatly.

Description

A joint bearing structure

technical field

The utility model relates to the field of design and manufacture of joint bearings, in particular to a joint bearing structure.

Background technique

Joint bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automobile shock absorbers, water conservancy machinery and other industries. It is a sliding bearing. The basic type is composed of an inner ring with an outer spherical surface and an inner ring with an inner ring. The spherical outer ring is mainly used for supporting parts with low concentricity requirements and high working surface pressure, and is also used for low-speed swing motion and low-speed rotary motion.

When the spherical plain bearing is working, the friction pair of the inner and outer rings slides relative to each other, and the contact surface will be worn. How to effectively reduce friction and reduce wear is the decisive factor to prolong the service life of the spherical plain bearing. The current common practice is to inject grease into the space around the joint bearing before use to achieve the lubrication effect, or design some lubricating structures on the inner and outer ring surfaces of the joint bearing, such as circumferential lubricating oil grooves, axial lubricating oil grooves, spiral And embossed lubricating oil groove, etc. Chinese patent 201521085134.4 discloses a self-lubricating spherical plain bearing structure, which includes an outer ring and an inner ring that are spherically fitted. There is a groove on the inner spherical surface of the outer ring. The groove is annular, and the bottom surface of the groove is a spherical surface. There is a self-lubricating liner; there are longitudinal oil supply holes on the outer end surface of the outer ring, and horizontal oil supply holes on the bottom of the groove. Both the longitudinal oil supply holes and the horizontal oil supply holes are blind holes, and the diameter of the longitudinal oil supply holes is smaller than the horizontal The diameter of the oil filling hole is designed so that the added lubricating oil is not easy to flow out, and it can better play the role of lubrication at any time.

The above methods can indeed enhance the lubrication performance of the joint bearing to a certain extent, but due to the small coverage surface of the lubricating oil groove, the lubrication effect on the working surface of the inner and outer rings of the joint bearing is limited; the operation tasks of personnel are heavy; and the maintenance cost is high. Make people in the relevant technical field request to improve the voice of joint bearing performance to remain high.

In recent years, the surface micro-texture technology of friction pair is one of the more effective means to improve the lubrication performance of parts. The micro-texture technology is used to process the spherical surface of the inner ring contacted by the joint bearing to form many tiny pits all over the spherical surface. These tiny pits can not only store lubricating oil and provide good lubrication for the contact surface of the joint bearing, but also absorb tiny abrasive particles to avoid abrasive wear of the joint bearing, thus greatly improving the service life of the joint bearing.

Utility model content

The technical problem to be solved by the utility model is to propose a joint bearing with a surface micro-texture that can increase surface lubrication and absorb tiny abrasive particles in view of the above-mentioned shortcomings of the prior art.

The utility model solves its technical problem, and the technical solution adopted is to propose a joint bearing structure, which includes:

an outer ring with a spherical inner surface;

an inner ring having a spherical outer surface and housed in said outer ring, said outer surface being arranged with pockets for storing lubricating oil and absorbing abrasive particles;

Both the inner and outer surfaces of the outer ring and the inner ring are provided with annular lubricating grooves, and the width of the annular lubricating grooves gradually increases from the bottom of the groove to the outside of the groove.

Further, a first annular lubricating groove is provided at the center of the outer surface of the outer ring in the circumferential direction, and a second annular lubricating groove is provided at the center of the inner surface of the outer ring in the circumferential direction. The first annular lubricating groove and the A first through hole is provided between the second annular lubricating grooves.

Further, a third annular lubricating groove is provided at the center of the outer surface of the inner ring in the circumferential direction, and a fourth annular lubricating groove is provided at the center of the inner surface of the inner ring in the circumferential direction. The third annular lubricating groove and the A second through hole is provided between the fourth annular lubricating grooves.

Further, a self-lubricating liner is arranged in the second annular lubricating groove.

Further, the first through holes are multiple and distributed at equal intervals.

Further, there are multiple second through holes distributed at equal intervals.

Further, the width of the recesses is 50 microns to 100 microns, the depth is 10 microns to 20 microns, and the distance between the recesses is 200 microns to 400 microns.

Further, the percentage of area occupied by all the cavities is 5%-10%.

Further, the cavity is in a circular shape.

Further, the radius of the pocket farther from the radial plane of the center of the inner ring is smaller than the radius of the pocket farther from the radial plane of the center of the inner ring.

After adopting the above technical scheme, the beneficial effect of the utility model is that the existing micro-texture technology is used to process the outer surface of the inner ring of the joint bearing to form a plurality of dimples with a certain diameter, depth, spacing and area occupancy, The frictional work of the outer surface of the inner ring with multiple pockets and the rough outer surface of the outer ring can achieve the effect of storing lubricants to improve the lubrication performance of joint bearings, absorbing tiny abrasive particles and reducing wear; combined with annular lubrication grooves, automatic The structural design of the lubricating liner, the first through hole, and the second through hole increases the coverage of the corresponding lubricant and reduces the loss of the lubricant, thereby greatly improving the service life of the joint bearing as a whole.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

detailed description

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 1, a joint bearing structure described in this embodiment includes:

an outer ring 1 with a spherical inner surface;

Inner ring 2, the inner ring 2 has a spherical outer surface and is accommodated in the outer ring 1, the outer surface is arranged with a plurality of pockets 21 for storing lubricating oil and absorbing abrasive particles;

Both the inner and outer surfaces of the outer ring 1 and the inner ring 2 are provided with annular lubricating grooves, and the width of the annular lubricating grooves gradually increases from the bottom of the groove to the outside of the groove.

Through the above structural design, the space for storing lubricants is increased, the number of times of adding lubricants can be reduced during use, and the lubricants can be better preserved for a longer period of time, and the joint bearings can be lubricated for a long time; long-term use brings The tiny abrasive particles can also be absorbed, which can reduce the wear of the friction pair, prolong the service life of the joint bearing and reduce the maintenance cost.

As shown in Figure 2, a first annular lubrication groove 11 is provided at the center of the outer surface of the outer ring 1 in the circumferential direction, and a second annular lubrication groove 12 is provided at the center of the inner surface of the outer ring 1 in the circumferential direction. A first through hole 13 is provided between the first annular lubricating groove 11 and the second annular lubricating groove 12 .

A third annular lubricating groove 22 is provided at the center of the outer surface of the inner ring 2 in the circumferential direction, and a fourth annular lubricating groove 23 is provided at the center of the inner surface of the inner ring 2 in the circumferential direction. The third annular lubricating groove 22 and A second through hole 24 is provided between the fourth annular lubricating grooves 23 .

A self-lubricating liner is arranged in the second annular lubricating groove 12 . It is used to reduce the loss of lubricating matter, so that the lubricating matter can lubricate the friction pair of inner and outer rings at any time.

There are three first through holes 13 and they are equally spaced. Lubricant can be added to the outer ring in multiple directions, so that the lubricant can be distributed more evenly.

There are three second through holes 24 and they are equally spaced. Lubricant can be added to the inner ring in multiple directions, so that the lubricant can be distributed more evenly.

The width of the recesses 21 is 85 microns, the depth is 15 microns, and the distance between the recesses 21 is 300 microns and distributed uniformly. When in use, it can reasonably disperse the pressure, absorb more tiny abrasive particles generated by multiple parties, and reduce wear.

The recess 21 is in a circular shape. It can better reduce friction and increase the service life of the inner ring; the radius of the pocket 21 farther from the central radial plane of the inner ring is smaller than the radius of the pocket 21 farther from the central radial plane of the inner ring .

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (10)

1. A joint bearing structure, characterized in that: comprising: an outer ring with a spherical inner surface; an inner ring having a spherical outer surface and housed in said outer ring, said outer surface being arranged with pockets for storing lubricating oil and absorbing abrasive particles; Both the inner and outer surfaces of the outer ring and the inner ring are provided with annular lubricating grooves, and the width of the annular lubricating grooves gradually increases from the bottom of the groove to the outside of the groove. 2. A joint bearing structure according to claim 1, characterized in that: a first annular lubricating groove is provided at the circumferential center of the outer surface of the outer ring, and a circumferential center of the inner surface of the outer ring is provided with There is a second annular lubricating groove, and a first through hole is provided between the first annular lubricating groove and the second annular lubricating groove. 3. A joint bearing structure according to claim 1, characterized in that: a third annular lubricating groove is provided at the center of the outer surface of the inner ring in the circumferential direction, and a third annular lubrication groove is provided at the center of the inner surface of the inner ring in the circumferential direction. There is a fourth annular lubricating groove, and a second through hole is provided between the third annular lubricating groove and the fourth annular lubricating groove. 4. The joint bearing structure according to claim 2, characterized in that: a self-lubricating liner is arranged in the second annular lubricating groove. 5 . The spherical plain bearing structure according to claim 2 , wherein there are multiple first through holes distributed at equal intervals. 5 . 6 . The joint bearing structure according to claim 3 , wherein there are a plurality of second through holes distributed at equal intervals. 7 . 7. A joint bearing structure according to claim 1, characterized in that: the width of the dimples is 50 microns to 100 microns, the depth is 10 microns to 20 microns, and the distance between the dimples is 200 Micron ~ 400 micron. 8. A spherical plain bearing structure according to claim 1 or 6, characterized in that: the percentage of area occupied by all the dimples is 5%-10%. 9. A joint bearing structure according to claim 1, characterized in that: the recess is in a circular shape. 10. A joint bearing structure according to claim 9, characterized in that: the radius of the pocket farther away from the radial plane of the center of the inner ring is smaller than the radius of the pocket farther away from the radial plane of the center of the inner ring. The radius of the pocket.