CN202418250U - Thrust ball bearing and retainer thereof - Google Patents

Abstract

The utility model relates to a thrust ball bearing, which comprises a shaft ring and a seat ring stacked oppositely, a cage is arranged between the opposite end faces of the shaft ring and the seat ring, and the cage includes a ring-shaped body, which is arranged circumferentially There are pocket holes running through the two ends of the annular body, and spherical rollers are arranged in the pocket holes. One end of each pocket hole has a pocket bottom section that is limitedly matched with the spherical roller, and the other end is a pocket mouth. The pocket bottom sections of the pocket holes are respectively close to the two end surfaces of the annular body, and the pocket openings of each pocket hole are provided with chisels to prevent the rollers from coming out, and the pocket bottom sections of the pocket holes are narrowed and extend to the annular body The tapered hole segment of the corresponding end face. The tapered section at the bottom of the pocket hole of the cage of the utility model can change the angle of the cone top of the tapered section to change the cage relative to the shaft under the premise of ensuring that the bearing maintains a higher strength requirement when designing the bearing. The amount of movement of the ring and the seat ring, so that the amount of movement is less than the clearance between the cage and the shaft ring and the seat ring.

Description

Thrust ball bearings and their cages

technical field

The utility model relates to a thrust ball bearing for bearing radial force, and the utility model also relates to a cage of the thrust ball bearing. the

Background technique

At present, the thrust ball bearing is used to bear the axial thrust, including the shaft ring and the seat ring, the shaft ring and the seat ring are stacked together, and there is a cage between the shaft ring and the seat ring, including the ring body, the ring shape The main body is provided with pockets that run through the two ends of the ring-shaped main body in the circumferential direction. One end of each pocket has a pocket bottom section for limiting the spherical roller, and the other end is a pocket mouth. The pocket bottoms of the two adjacent pockets The segments are respectively close to the two ends of the annular body, that is to say the bottom segments of the two adjacent pockets are not at the same end of the two pockets. The bottom section of the pocket hole in the prior art is spherical. In addition, in order to prevent the steel ball from falling out of the pocket hole of the cage, chisels are provided on the edge of the pocket hole of the cage. The number of chisels is two or four. symmetrically distributed along the pocket circle. When the bearing is working, due to the gap between the spherical roller and the wall of the pocket hole, the cage will move relative to the shaft ring and the seat ring. In order to prevent the cage from interfering with the peripheral ring and the seat ring, it is necessary to reduce the retaining The height of the cage is to meet the condition that the cage does not collide with the shaft ring and the seat ring, and the number of debugging of this design is uncontrollable. In this way, because the height of the cage is reduced, the strength of the cage is weakened. Process performance deteriorates, especially for high-precision (ultra-light) thin-walled thrust ball bearings, due to the reduction in the height of the cage, its strength will be further weakened, and even fail to meet the requirements of the bearing; in addition, the lock ball gouging area The strength of the pocket is also weakened, and it will be more difficult to chisel the edge of the pocket, especially in the process of cage processing and assembly, it is difficult to control, especially it is difficult to ensure that the spherical pocket of the cage is stressed first, and the yield rate is greatly reduced. Economic efficiency is low. the

Utility model content

The purpose of this utility model is to provide a thrust ball bearing to solve the problem in the prior art that the strength of the cage cannot meet the design requirements due to the method of reducing the height of the cage to avoid the collision between the cage and the shaft ring and the seat ring At the same time, the purpose of this utility model is to provide a cage for the thrust ball bearing. the

In order to achieve the above object, the thrust ball bearing of the utility model adopts the following technical scheme: a cage of a thrust ball bearing, comprising a ring-shaped body, and the ring-shaped body is provided with pockets penetrating through both ends of the ring-shaped body in the circumferential direction, One end of each pocket hole has a pocket bottom section for limiting the position of the spherical roller, and the other end is a pocket opening. The pocket bottom sections of two adjacent pocket holes are respectively close to the two end faces of the annular body. A chisel is provided at the opening of the pocket to prevent the spherical roller from falling out, and the bottom section of the pocket is a tapered hole section that shrinks and extends to the corresponding end surface of the annular body. the

The cage of the thrust ball bearing of the present invention adopts the following technical scheme:

A thrust ball bearing, comprising a shaft ring and a seat ring stacked opposite to each other, a cage is arranged between the opposite end faces of the shaft ring and the seat ring, the cage includes a ring-shaped body, and the ring-shaped body is arranged with a penetrating ring in the circumferential direction. There are pocket holes on both ends of the body, and spherical rollers are arranged in the pocket holes. One end of each pocket hole has a pocket bottom section that is limitedly matched with the spherical roller, and the other end is a pocket opening. The pocket bottom sections of two adjacent pocket holes Close to the two end surfaces of the ring body respectively, the ring body is provided with chisels to prevent the rollers from coming out at the mouth of each pocket hole, and the bottom section of the pocket hole is the corresponding part extending from the shrinkage to the ring body. Tapered hole segment in end face.

The pocket bottom section of the pocket hole of the cage of the utility model is a tapered section. When designing the bearing, it is possible to change the relative angle of the cage by changing the angle of the cone top of the cone section under the premise of ensuring that the bearing maintains a higher strength requirement. The amount of movement of the shaft washer and race such that the movement is less than the clearance between the cage and the shaft washer and race. In order to avoid interference between the cage, the shaft ring and the seat ring without reducing the height of the cage and ensuring the strength of the cage. the

Description of drawings

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

Fig. 2 is A-A rotation sectional view of Fig. 1;

Fig. 3 is the sectional view of B-B in Fig. 1;

Fig. 4 is a partial enlarged view of the chisel in Fig. 2;

Fig. 5 is a principle diagram of adjusting the moving amount of the cage according to the embodiment of the present invention;

FIG. 6 is a partially enlarged view at X in FIG. 5 .

Detailed ways

An embodiment of a cage for a thrust ball bearing. In FIGS. 1 to 4, the annular body 1 of the cage is provided with pockets 3 in the circumferential direction, and the pockets 3 run through both ends of the annular body 1. Each pocket One end of 3 has a pocket bottom section 4, the pocket bottom section 4 is a cone section, and the constriction of the pocket bottom section 4 extends to the end surface of the annular body 1. The other end of each pocket hole 3 away from the bottom of the pocket is the mouth of the pocket. The pocket bottoms of two adjacent pocket holes 3 are respectively close to two end surfaces of the annular body 1 , that is to say, the pocket bottoms of two adjacent pocket holes 3 are close to different end surfaces of the annular body 1 . The annular body 1 is provided with a chisel 2 at the mouth of each pocket, and in this embodiment, two chisels 2 are provided corresponding to each pocket 3 . When in use, the spherical roller is arranged in the pocket hole, and one end of the spherical roller is limitedly matched with the bottom section of the pocket, and the other end is matched with the chisel to prevent disengagement, and the spherical roller is movably arranged in the pocket hole. the

An embodiment of a thrust ball bearing, in Figures 1 to 4, with reference to Figures 5 and 6, the thrust ball bearing has a shaft ring and a seat ring, the shaft ring and the seat ring are stacked oppositely, and the opposite end surfaces of the shaft ring and the seat ring A cage is arranged between them, and the annular body 1 of the cage is provided with pocket holes 3 in the circumferential direction. The conical section, the constriction of the bottom section 4 extends to the end surface of the annular body 1 . The other end of each pocket hole 3 away from the bottom of the pocket is the mouth of the pocket. The pocket bottoms of two adjacent pocket holes 3 are respectively close to two end surfaces of the annular body 1 , that is to say, the pocket bottoms of two adjacent pocket holes 3 are close to different end surfaces of the annular body 1 . The annular body 1 is provided with a chisel 2 at the mouth of each pocket, and in this embodiment, two chisels 2 are provided corresponding to each pocket 3 . Spherical roller 5 is provided with in the pocket hole 3, and one end of spherical roller 5 is limit-fitted with pocket bottom section 4, and the other end cooperates with chisel 2 anti-disengagement, and spherical roller 5 is movably arranged in the pocket hole. the

In Figure 5 and Figure 6, since the spherical roller 5 is clearance fit in the pocket, when the two ends of the spherical roller press against the shaft ring and the seat ring, the cage can be opposite to the spherical roller , that is, relative to the movement of the shaft ring and the seat ring, the angle with the cone top of the bottom section of the pocket is one of the factors to determine the amount of movement. Changing the angle of the cone top of the bottom section 4 can change the amount of movement of the cage. From the expression at the Y position in Figure 6, those skilled in the art can clearly draw the angle of the cone top of the bottom section 4. It can be concluded that the amount of movement of the cage can be changed. In this example, the height of the cage was not changed, and it was assumed that the diameter of the outer port at the bottom section of the pocket was constant. Of course, it is also possible to assume that the height of the bottom section of the pocket is constant to change the angle of the cone top of the bottom section 4, so as to change the amount of movement of the cage. Of course, at this time, the diameter of the outer port at the bottom section of the pocket hole will change accordingly. In this case, too, a constant height of the cage can be guaranteed. the

After determining the angle of the cone top of the bottom section 4, the slope of the chisel can be adjusted so that when the symmetrical planes of the corresponding two chisels pass through the center line of the pocket, the working surface of the chisel is at the bottom of the pocket. The outer side of the wall ensures that when the cage moves, the bottom section 4 will contact the spherical roller before the chisel, so that the bottom section 4 can bear the load, so that the chisel only acts as a limiter, which is easy to ensure the service life of the bearing . the

Claims (2)

1. the retainer of a thrust ball bearing; Comprise annular body; Annular body is in the pocket hole that upwards is laid with the both ends of the surface that run through annular body week; One end in each pocket hole has and is used to the spacing section of revealing all the details of spherical roller, and the other end is the pocket mouth, and the section of revealing all the details in two adjacent pocket holes is respectively near two end faces of annular body; Be provided with in the pocket mouth place in each pocket hole on the annular body and be used to the cutter mouth that prevents that spherical roller from deviating from, it is characterized in that: the section of revealing all the details in described pocket hole extends to the cone shape hole section of the corresponding end face of annular body for reducing.

2. a thrust ball bearing comprises folded relatively blowout patche and the seat ring of establishing, and is provided with retainer between the opposing end surface of blowout patche and seat ring; Retainer comprises annular body; Annular body is provided with spherical roller in the pocket hole that upwards is laid with the both ends of the surface that run through annular body week in the pocket hole, an end in each pocket hole has and the spacing section of revealing all the details that cooperates of spherical roller; The other end is the pocket mouth; Near two end faces of annular body, the pocket mouth place in each pocket hole on the annular body is provided with the cutter mouth that prevents that roller from deviating from, and it is characterized in that: the section of revealing all the details in described pocket hole extends to the cone shape hole section of the corresponding end face of annular body to the section of revealing all the details in two adjacent pocket holes for reducing respectively.

Images