CN113775652A

CN113775652A - Bearings with open cages

Info

Publication number: CN113775652A
Application number: CN202010517738.0A
Authority: CN
Inventors: 雷飞
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-12-10

Abstract

A bearing with an open cage includes an inner ring and an outer ring, an opening of the cage for accommodating rolling bodies is open toward an axial first side of the bearing, the cage has a radially convex There is an elastic limiting member, which can be elastically deformed in the radial direction of the bearing under the action of radial force, and the inner ring and/or the outer ring has a matching function with the limiting member. When the cage is assembled with the inner ring or the outer ring, the stopper crosses the rib in the axial direction of the bearing and radially elastically deforms at the same time. The limiter rebounds after passing over the baffle to realize the limit. The cage will not accidentally fall off in the axial direction when subjected to shock during transportation or handling, and when the opening becomes larger in high-speed applications.

Description

Bearing with open type retainer

Technical Field

The invention relates to the technical field of bearings, in particular to a bearing with an open retainer.

Background

In some current bearings, there is a split cage made of nylon, the pockets of which have openings that open axially to one side. Such a cage may fall off the bearing when subjected to an impact during transportation or handling. In high-speed applications, the elastic modulus of the nylon material is reduced due to the increased temperature of the bearing, and the opening size of the retainer is increased under the action of centrifugal force, so that the risk of falling and flying of the retainer is increased, and the bearing is easy to fail.

With the development of automobile electrification, the requirement on the rotating speed of the deep groove ball bearing is higher and higher, so that the risk of falling and flying is particularly existed in the deep groove ball bearing.

Therefore, a technical problem to be solved by those skilled in the art is to prevent the open type cage from accidentally falling off the bearing.

Disclosure of Invention

The present invention has been made in view of the state of the art described above. The invention aims to provide a bearing with an open type retainer, wherein the open type retainer cannot be accidentally dropped from the bearing.

The utility model provides a bearing with open type holder, includes inner circle and outer lane, the opening orientation that is used for holding the rolling element of holder the axial first side of bearing is opened, the holder has along radial convex elastic locating part, the locating part can be in under the effect of radial force the radial elastic deformation of bearing, the inner circle and/or the outer lane have with locating part complex flange the holder with when the inner circle perhaps the outer lane is assembled, the locating part is in the axial of bearing is crossed the flange and is taken place radial elastic deformation simultaneously, the locating part is crossing springback and realize spacingly behind the flange.

Preferably, the inner ring has an inner ring rib protruding radially outward, the retainer has a stopper protruding radially inward, and an inner diameter of the stopper is smaller than an outer diameter of the inner ring rib in a state where the stopper is not compressed by a force; and/or the outer ring is provided with an outer ring rib protruding inwards in the radial direction, the retainer is provided with a limiting piece protruding outwards in the radial direction, and the outer diameter of the limiting piece is larger than the inner diameter of the outer ring rib in the state that the limiting piece is not compressed under the stress.

Preferably, the retainer has a ring beam, the stopper has a connecting end on the ring beam and a free end spaced apart from the ring beam in the radial direction, the free end is located on the second axial side of the connecting end, and the stopper is elastically deformable in such a manner that the free end approaches the ring beam when acted on by a radial force.

Preferably, the stopper is a sheet.

Preferably, the axial dimension of the retaining member is smaller than the circumferential dimension of the retaining member.

Preferably, the stopper and the collar are integrally formed.

Preferably, the stop and the collar comprise nylon.

Preferably, the retainer has a ring beam, the limiting member protrudes from the ring beam, an axial second end surface of the limiting member is aligned with an axial second end surface of the ring beam in the axial direction, and an axial first end surface of the inner ring rib is aligned with the axial second end surface of the retainer in the axial direction or has a gap.

Preferably, the bearing includes a plurality of the stoppers evenly dispersed in a circumferential direction of the bearing, and the inner ring rib and/or the outer ring rib are formed along the entire circumference in the circumferential direction.

Preferably, there is one said retaining member between each adjacent two pockets.

By adopting the technical scheme, at least the following beneficial effects can be obtained:

when the bearing is assembled, the inner ring rib and/or the outer ring rib are/is located on the axial second side of the limiting part, the inner ring rib and/or the outer ring rib can block the limiting part from moving towards the axial second side, and when the bearing is impacted in transportation or transportation and the opening is enlarged in a high-speed application occasion, the retainer cannot accidentally fall off from the axial second side. In addition, the assembly process of the bearing is simplified by arranging the limiting piece capable of elastic deformation.

Drawings

FIG. 1 is a schematic view, partially in cross-section, of one embodiment of a bearing with an open cage provided by the present disclosure.

Fig. 2 is a perspective view of the open type cage of fig. 1.

Fig. 3 is a front view of the open type cage of fig. 2.

Fig. 4a is a schematic view of the assembly process of the cage of fig. 1, showing the retainer before it passes over the inner ring rib.

Fig. 4b is a schematic view of an assembly process of the cage of fig. 1, showing the position of the position limiting member in contact with the rib of the inner race.

Fig. 4c is a schematic view of the assembly process of the cage of fig. 1, showing the position of the limiter after it has passed over the inner ring rib.

Description of reference numerals:

1 inner ring, 11 inner ring bodies, 12 inner ring flanges, 2 outer rings, 3 retainers, 30 openings, 31 ring beams, 32 limiting parts, 321 free ends, 322 connecting ends, 33 clamping jaws, 34 ribs, 35 pockets and 4 steel balls;

the R axis is a first side, and the L axis is a second side.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is intended only to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.

As shown in fig. 1, the present disclosure provides a bearing having an open type cage 3, such as a rolling bearing like a deep groove ball bearing, which is described herein as an example.

It should be noted that, hereinafter, "axial first side R" and "axial second side L" refer to two opposite sides in the axial direction of the bearing, for example, the right side in fig. 1 and fig. 4a to 4c is "axial first side R", and the left side is "axial second side L"; the end corresponding to the axial first side R is an "axial first end" and the end corresponding to the axial second side L is an "axial second end". The "radially outer side" refers to a side radially distant from the bearing center, the "radially inner side" refers to a side radially close to the bearing center, the upper side in fig. 1 and 4a to 4c is the "radially outer side", and the lower side is the "radially inner side".

As shown in fig. 1 and 2, the bearing includes an inner ring 1, an outer ring 2, steel balls 4, and a split cage 3, the outer ring 2 being located radially outside the cage 3, and the inner ring 1 being located radially inside the cage 3. The retainer 3 comprises a ring beam 31, claws 33, ribs 34 and a stopper 32, wherein the ring beam 31 is formed along the whole circumference of the bearing so as to be annular, the claws 33 axially extend from the ring beam 31, the claws 33 are paired in pairs, a pocket 35 is formed between each pair of claws 33, and each two adjacent pairs of claws 33 are connected through the ribs 34.

The pockets 35 are open toward the first side R in the axial direction, the openings 30 of the pockets 35 are the openings 30 of the cage 3, the steel balls 4 are accommodated in the pockets 35 and are caught by the claws 33, the cage 3 may have a plurality of steel balls 4 serving as rolling bodies and a plurality of pockets 35 in a one-to-one correspondence, and the steel balls 4 and the pockets 35 may be uniformly dispersed in the circumferential direction. The main function of the claws 33 and the pockets 35 is to mount and guide the steel balls 4, and the ring beam 31 and the ribs 34 are used to connect the claws 33 and ensure sufficient strength of the cage 3.

The inner ring 1 has an inner ring body 11 and an inner ring rib 12 projecting radially outward, and both the inner ring rib 12 and the inner ring body 11 are formed along the entire circumference in the circumferential direction of the bearing. The inner ring rib 12 may be integrally formed with the inner ring body 11.

The cage 3 may comprise or be formed from a nylon material. The cage 3 may be in one piece, for example integrally formed by an injection moulding process (for example cast nylon). Specifically, the ring beam 31, the claw 33, the rib 34, and the stopper 32 of the retainer 3 may be integrally formed.

In this way, in the existing molding process, only the molding die of the cage 3 needs to be changed without excessive changes in other respects, so that the manufacturing process of the improved bearing can be simplified.

Compared with a metal retainer, the retainer 3 made of nylon material has light weight and small centrifugal force, and is particularly suitable for application occasions with high rotating speed. The retainer 3 made of nylon material has better toughness after obtaining a certain humidity.

As shown in fig. 3 and 4a, the limiting member 32 protrudes inward from the retainer 3 in the radial direction, the limiting member 32 may be a cantilever structure so as to have a connection end 322 and a free end 321, the connection end 322 of the limiting member 32 may be connected to the ring beam 31, the free end 321 is spaced apart from the ring beam 31 in the radial direction of the bearing, and the free end 321 may be located on the second axial side L of the connection end 322. It will be understood that the free end 321 and the opening 30 are located on axially opposite sides of the connecting end 322, so that the retaining member 32 gradually inclines radially outward in the opening direction of the opening 30.

In the state where the limiting member 32 is not compressed by force, i.e. the limiting member 32 is in the natural extension state, the radially inner ends (e.g. the free ends 321) of the limiting member 32 are located on the same circumference, and the diameter of the circumference is the inner diameter D1 of the retainer 3 (the limiting member 32). The outer edge of the inner ring rib 12 forms a circumference having a diameter that is the outer diameter D2 of the inner ring rib 12. The inner diameter D1 of the cage 3 is smaller than the outer diameter D2 of the inner ring rib 12, so that when the bearing is assembled, the inner ring rib 12 is located on the second axial side L of the position-limiting member 32, and the inner ring rib 12 can block the position-limiting member 32 from moving to the second axial side L, the cage 3 will not accidentally fall off from the second axial side L when the bearing is subjected to impact during transportation or transportation, and when the opening 30 (shown in fig. 2) becomes large in high-speed applications.

The limiting member 32 is an elastically deformable member, for example, capable of elastically deforming under the action of a radial force, specifically, under the action of a radially outward force, the free end 321 of the limiting member 32 will be close to the ring beam 31 to elastically deform, and when the radial force is cancelled, the limiting member 32 returns to the initial state, and the free end 321 of the limiting member 32 is spaced from the ring beam 31 in the radial direction, so that the limiting member 32 has a sufficient deformation space.

When assembling the bearing, the outer ring 2, the inner ring 1 and the steel ball 4 are put in place, and then the cage 3 subjected to humidity conditioning treatment is installed in the axial direction.

Fig. 4a to 4c are schematic views illustrating an assembly process of the cage 3, and the respective views omit the outer ring 2 and retain only the inner ring 1 for the sake of simplicity.

The direction in which the retainer 3 is fitted into the bearing may be the same as the opening direction of the opening 30, so that the stopper 32 has a tendency to incline radially outward along the direction in which the retainer 3 is fitted. The assembly process of the cage 3 is as follows:

firstly, the cage 3 is assembled from an axial second side L (for example, the left side in fig. 4 a) to an axial first side R (for example, the right side in fig. 4 a), in fig. 4a, the ribs 34 of the cage 3 are located directly outside the inner ring 1 in the radial direction, and the stopper 32 is located on the axial second side L of the inner ring rib 12 without reaching the directly outside of the inner ring 1 in the radial direction;

then, the retainer 3 is continuously installed in the axial direction, and during the installation process, since the limiting member 32 has the above-mentioned inclination tendency, the limiting member 32 is gradually elastically deformed in the radial direction by the radially outward acting force of the inner ring rib 12, specifically, the free end 321 of the limiting member 32 is close to the ring beam 31, and in fig. 4b, the limiting member 32 is installed to the state of being located just outside in the radial direction of the inner ring rib 12;

finally, with the gradual insertion of the cage 3, as shown in fig. 4c, the stopper 32 is fitted between the inner ring 1 and the outer ring beyond the inner ring rib 12, so that the radially outward acting force is cancelled, the stopper 32 rebounds to the initial state, specifically, the free end 321 is spaced apart from the ring beam 31, and the stopper 32 is entirely located on the first axial side R (e.g., the right side in fig. 4 c) of the inner ring rib 12.

After the retainer 3 crosses the inner ring rib 12 from the second axial side L of the inner ring rib 12, the retainer 3 (the limiting member 32) is blocked by the inner ring rib 12 and cannot fall off from the second axial side L of the bearing, so that the limiting member 32 limits the retainer 3.

In other embodiments, the limiting member 32 may have other forms than a cantilever structure, for example, the limiting member 32 may include an elastic block (e.g., a plastic block, a rubber block, etc.) that is compressed (elastically deformed in a radial direction) by a radially outward force when the retainer 3 is axially installed.

In other embodiments, the position-limiting member 32 can also be made of more than two materials.

The assembly process of the bearing is simplified by providing an elastically deformable stop 32.

The stopper 32 may be a sheet, for example, a sheet having a thickness of 0.3mm to 0.5mm, and such a stopper 32 is preferable in terms of deformability.

With continued reference to fig. 2, the axial dimension of the limiting member 32 is less than the circumferential dimension of the limiting member 32, which is sufficiently large to facilitate strengthening the structural strength of the limiting member 32.

The bearing may have a plurality of stoppers 32 uniformly dispersed in the circumferential direction, so that the cage 3 is uniformly stressed at multiple points when the inner ring rib 12 blocks the cage 3.

Further, the limiting member 32 may be located between two adjacent pockets 35 (between two adjacent pairs of claws 33), and one limiting member 32 may be disposed between every two adjacent pockets 35. A large installation space is provided between two adjacent pockets 35, and the retaining member 32 is suitable for being arranged.

Of course, in other embodiments, a plurality of the retaining members 32 may be uniformly arranged in the circumferential direction, and the retaining members 32 do not necessarily have to be located between the two pockets 35.

With continued reference to fig. 1, the second axial end surface of the limiting member 32 may be aligned with the second axial end surface of the ring beam 31 in the axial direction of the bearing, so that the second axial end surface of the limiting member 32 and the second axial end surface of the ring beam 31 are both located in the second axial end surface of the retainer 3. The axial first end face of the inner ring rib 12 and the axial second end face of the retainer 3 have a clearance in the axial direction, so that the friction of the limiting part 32 can be effectively reduced in the bearing working process.

In other embodiments, the axial first end face of the inner ring rib 12 may be axially aligned with the axial second end face of the cage 3.

Thus, when the improved bearing is manufactured, the original bearing (such as the bearing with the current high-speed deep groove ball retainer) can be improved, such as widening the outer ring 2 and the inner ring 1 on the basis of the original bearing, and adding the limiting piece 32, the sizes of other components can be kept unchanged, the improvement cost is low, and the practicability is high.

The axial second end face of the inner ring rib 12 may be aligned with the axial second end face of the inner ring body 11 in the axial direction of the bearing.

The axial second end face of the inner ring rib 12 does not exceed the axial second end face of the inner ring body 11 in the axial direction, and the axial second end face of the limiting piece 32 does not exceed the axial second end face of the ring beam 31 in the axial direction, so that the structure of the inner ring 1 and the retainer 3 is compact.

In other embodiments, the limiting member 32 may also protrude radially outward from the retainer 3, and the outer ring 2 has an outer ring rib protruding radially inward, and the outer ring rib is located on the second axial side L of the limiting member 32, so that when the bearing is assembled, the outer ring rib can block the limiting member 32 from moving toward the second axial side L, and the retainer 3 cannot accidentally fall off from the second axial side L. The inner edges of the outer ring ribs are located on the same circumference, the diameter of the circumference is the inner diameter of the outer ring ribs, when the limiting part 32 is not stressed and compressed, namely, the limiting part 32 is in a natural extension state, the radial outer ends of the limiting part 32 are located on the same circumference, the diameter of the circumference is the outer diameter of the retainer 3 (the limiting part 32), and the outer diameter of the retainer 3 is larger than the inner diameter of the outer ring ribs.

In the bearing provided by the present disclosure, at least one of the inner ring 1 and the outer ring has a rib (the inner ring rib 12 and the outer ring rib as described above) that cooperates with the limiting member 32, when the retainer 3 is assembled with the inner ring 1 or the outer ring, the limiting member 32 passes over the rib in the axial direction of the bearing and is elastically deformed in the radial direction at the same time, and the limiting member 32 rebounds after passing over the rib to realize the limiting.

The bearing using the combination of the inner ring rib 12 and the limiting member 32 has a simpler process than the bearing using the combination of the safety rib and the limiting member 32.

It should be understood that the above embodiments are only exemplary and are not intended to limit the present invention. Various modifications and alterations of the above-described embodiments may be made by those skilled in the art in light of the teachings of the present invention without departing from the scope thereof.

Claims

1. A bearing with an open cage, comprising an inner ring (1) and an outer ring, an opening (30) of the cage (3) for accommodating rolling elements faces an axial first side of the bearing open, characterized by:

The cage (3) has an elastic limiting member (32) protruding in the radial direction, and the limiting member (32) can be elastically deformed in the radial direction of the bearing under the action of radial force, so The inner ring (1) and/or the outer ring have ribs that cooperate with the limiting member (32), and when the cage (3) is assembled with the inner ring or the outer ring, the The limiting member (32) crosses the rib in the axial direction of the bearing and undergoes radial elastic deformation at the same time.

2 . The bearing with an open cage according to claim 1 , wherein the inner ring ( 1 ) has inner ring ribs ( 12 ) protruding radially outward, and the cage ( 2 ) 3) There is a limiter (32) protruding radially inward, and in a state where the limiter (32) is not compressed by force, the inner diameter of the limiter (32) is smaller than that of the inner ring the outer diameter of the rib (12); and/or

The outer ring has an outer ring rib that protrudes radially inward, the cage (3) has a limiter that protrudes radially outwards, and the limiter (32) is not stressed In a compressed state, the outer diameter of the limiting member (32) is larger than the inner diameter of the outer ring rib.

3 . The bearing with an open cage according to claim 1 , wherein the cage ( 3 ) has a ring beam ( 31 ), and the limiting member ( 32 ) has a ring beam ( 31 ) located on the ring beam ( 3 . 31) on the connecting end (322) and a free end (321) spaced from the ring beam (31) in the radial direction, the free end (321) being located in the axial direction of the connecting end (322) On the second side, under the action of radial force, the limiting member (32) can be elastically deformed in such a way that the free end (321) is close to the ring beam (31).

4 . The bearing with an open cage according to claim 1 , wherein the limiting member ( 32 ) is a sheet body. 5 .

5 . The bearing with an open cage according to claim 1 , wherein the axial dimension of the limiting member ( 32 ) is smaller than the circumferential dimension of the limiting member ( 32 ). 6 .

6 . The bearing with an open cage according to claim 3 , wherein the limiting member ( 32 ) and the ring beam ( 31 ) are integrally formed. 7 .

7. The bearing with an open cage according to claim 3, wherein the limiting member (32) and the ring beam (31) comprise nylon.

8 . The bearing with an open cage according to claim 1 , wherein the cage ( 3 ) has a ring beam ( 31 ), and the stopper ( 32 ) extends from the ring beam ( 31 ). 9 . ) protruding, the axial second end face of the limiting member (32) is aligned with the axial second end face of the ring beam (31) in the axial direction, and the inner ring rib (12) The axial first end face and the axial second end face of the cage (3) are aligned in the axial direction or have a gap.

9 . The bearing with an open cage according to claim 1 , wherein the bearing comprises a plurality of the limiting members ( 32 ) uniformly distributed along the circumferential direction of the bearing, and the inner ring The rib (12) and/or the outer ring rib are formed along the entire circumference in the circumferential direction.

10 . The bearing with an open cage according to claim 9 , characterized in that, there is one limiting member ( 32 ) between every two adjacent pockets ( 35 ). 11 .