What is the method for positioning the inner and outer rings of the bearing?

a) The retaining ring of the shaft is embedded in the groove of the shaft, which is mainly used when the axial force is not large and the speed is not high;

b) The shaft end retaining ring fixed with screws is fastened, which can be used to withstand large axial forces at high speeds, and the screws should have anti-loosening measures;

c) Fastening with round nuts and stop washers, mainly used for high speed and large axial force;

d) Positioning with a tapered sleeve, fastening with a stop washer and a round nut, for bearings on the optical shaft with a tapered bore in the inner ring.

The role of the bearing locating ring is obviously for positioning, and in most cases it is for positioning the rolling bearing. There are many ways to position and fix the inner and outer rings of rolling bearings, and the following are several commonly used methods.

a) The retaining ring of the shaft is embedded in the groove of the shaft, which is mainly used when the axial force is not large and the speed is not high;

b) The shaft end retaining ring fixed with screws is fastened, which can be used to withstand large axial forces at high speeds, and the screws should be dismantled and have anti-loosening measures;

c) Fastening with round nuts and stop washers, mainly used for high speed and large axial force;

d) Use tapered sleeve positioning, stop washer and round nut to fasten the dust, which is used for bearings on the optical shaft and the inner ring is a tapered hole.

a) Positioning of the shoulder and spring retaining ring.

b) Positioning of the shaft shoulder and the shaft end retaining ring.

c) Positioning of shaft shoulders, round nuts and stop washers.

d) Positioning with a tapered sleeve.

e) Tighten with an elastic retaining ring with a hole embedded in the groove of the shell, mainly used when the axial force is not large and the size of the bearing device needs to be reduced;

f) Fastened with bearing end covers, used for all kinds of centripetal, thrust and radial thrust bearings with high speed and large axial force;

g) Tighten with the shaft with an elastic retaining ring embedded in the stop groove of the outer ring of the bearing, and use the travel imitation based on when the shell is inconvenient to set up a convex shoulder;

h) Fastening with threaded rings, used for high bearing speed, large axial force, and not suitable for fastening with bearing end caps.

1. Pull out method. Depending on the diameter of the FAG imported bearing ring, the original prototype is completed according to the above-mentioned half-shaft method, and half of the discarded or 185 cylinder liner is cut off, and then the round hole steel plate of the half-shaft is just exposed on the cylinder liner gasket, and the half-shaft nut is tightened, and it can be pulled out together with the bearing outer ring and the half-shaft.

2. Welding and cutting method. Weld and cut the outer ring of the bearing from bottom to top with electric welding, and the molten iron flows downward and on both sides to form a welding seam, eliminate the tension of the outer ring of the bearing, and then pry it out with an iron rod.

3. Heating method. The part around the half-shaft sleeve of the outer ring of the bearing is heated to expand it, and the outer ring of the bearing can fall off without effort.

4. Iron rod oblique striking method. From the other end, the iron rod is obliquely into the groove of the outer ring of the bearing, hit it with a hammer, and the groove of the outer ring of the bearing is changed from time to time, and the outer ring of the bearing can be removed.

5. Iron plate horizontal and vertical method. The iron plate of about 50 cm of long wax, 3 cm wide and 1 cm thick is placed in the outer ring of the bearing, one person pries the outer ring of the bearing, and one person uses the iron rod to hit the iron plate, and the corresponding direction of the iron plate can be removed at any time.

The function of the locating ring is to fix the bearing in a certain position and save it immovable, which mainly means that the bearing is kept immovable when it is subjected to axial force or radial force when working.

The bearing is nailed to the housing so that it does not move due to axial thrust.

How to combine the fixing of the inner and outer rings of rolling bearings? First of all, it is necessary to be clear about the characteristics of the bearing you choose, such as the direction of the bearing capacity, whether it can be aligned, whether it needs preload, etc. Finally, you want to imagine if you pull and push the shaft "hard", whether you can pull out and push the shaft.

If it can, then there is a problem with the positioning and fixing of the bearing; If not, it means that the bearing positioning is reliable. Use this "point of view" to analyze the way you fix the inner and outer rings of the bearing mentioned above, and you will be able to find out the answer yourself.

The above judgment of "imagination" can clarify two points. First, the axial force on the shaft will be transmitted to the box wall through the bearing (if there is an axial force); Second, the shaft has reliable axial positioning in the axial direction.

In addition to thrust bearings, other forms of bearings are subjected to radial forces, so there is no need to consider the radial problem (referring to positioning, fixation, not bearing capacity).

As for the question of "when the rolling bearing is completely fixed (four directions) and when it is not completely fixed (two directions)", it depends on the specific structural design. If the shaft is subjected to axial force, it can generally only be "not completely fixed (in both directions)"; In addition, if the "size" of the bearing is the same at both ends of the shaft, this fixing method is also often adopted. If the shaft does not bear the axial force, or the axial force is very small, and because of the transmission layout (such as, the arrangement of gears), the support reaction force of a bearing is very large, so it is necessary to select a large-capacity bearing (radial, wide, and size are larger), in this "large-capacity bearing", the positioning mode of "completely fixed (four directions)" is adopted, and the effect is much better than the way of "incomplete fixation (two directions)".

After all, large bearings are more capable of bearing axial forces. Hope it helps.

The first thing to do is to remove the cage, and then there are two cases:

The first is when there are more rolling elements, concentrate the rolling elements on one side, leave only one on the other side, and then squeeze the outer ring, and take out the rolling element at the moment when the outer ring produces elastic deformation, and the remaining rolling elements can basically be taken out directly by hand.

The second is that there are fewer rolling elements, so press the inner ring to one side, and the gap left on the other side can directly take out the rolling elements.

The following is an introduction to bearing installation, I believe you can learn something from it:

Angular contact bearing: the retainer is sleeved on the inner ring--- a steel ball is placed --- fixed steel ball (how to fix it is not clear) - pressed into the jacket (a larger general hot installation.

Spherical roller bearings: The retainer is placed on the inner ring--- the rollers are knocked on (leaving a few grains empty for the coat to be put in) - put in the jacket --- press the rollers to the fullest.

Needle roller bearing: without retainer: grease the outer ring groove (easy to press the needle) - put the needle roller ---if there is an inner sleeve, then press the inner sleeve).

With retainer: Put the retainer into the inner sleeve ---press the upper needle roller --- press the inner sleeve if there is an inner sleeve).

If you don't have an inner or outer coat: press the needle on the retainer.

Tapered roller bearings: The rollers are placed on the retainer--- the inner sleeve is pressed into the --- shrink retainer --- the outer jacket is placed.

Spherical bearings: the outer sleeve is disconnected: the inner ball is pressed into the outer coat at 90 degrees).

The coat is milled and installed in the opening: the inner ball is placed in the coat at 90 degrees.

Deep groove ball bearings: The steel balls are embedded in the inner and outer jackets--- put on the retainer--- riveted.

The purpose of fixing bearing rings:

1. Prevent the relative displacement of the contact surface between the outer ring of the bearing and the bearing chamber, the contact surface of the inner ring of the bearing and the shaft.

2. Prevent the relative displacement of the outer ring and the inner ring of the bearing.

Theoretically, the rotating bearing type should be completely fixed to achieve one or one of the above two or one of the purposes. Tapered roller bearings and angular contact ball bearings (when used as a single bearing) can achieve the above purpose as long as they are fixed in two directions, so why fix them in multiple ways!

In fact, tapered roller bearings and angular contact ball bearings are used in combination with two or more rows (e.g., DB, DF) and need to be fixed in four directions.

If the shaft itself has a large axial force, then we generally choose four-point fixation, otherwise, choose two-point fixation!

In order to take full advantage of the load-bearing capacity, an appropriate amount of interference should be applied to the inner and outer rings of the bearing, which must be fully surface-supported over its entire circumference and the entire width of the raceway. The support must be solid and homogeneous, even if the support surface can be cylindrical or conical, or in the case of thrust rings, it can be a flat support. That is to say, the bearing bearing surface must be manufactured with sufficient precision, and its surface should not be affected by any grooves, holes, etc.

In addition, the bearing ring must be held securely to prevent it from rotating in the bearing bearing surface under load.

As a general rule, satisfactory radial positioning and adequate support can only be achieved if an appropriate amount of interference is applied when installing the inner and outer rings of the bearing. Inadequate or incorrect fixation of bearing rings often results in damage to bearings and related components. However, an interference fit should not be used if easy mounting and disassembly is required, or if axial displacement is required for non-locating end bearings.

In some cases where loose fits are used, special precautions may be taken to limit wear and tear caused by peristalsis. For example, the support surface of the shaft and the abutment are hardened, the mating surface is lubricated by means of special lubrication grooves to remove wear particles, or keyways or other fixtures are added to the side of the bearing ring.

Relying only on interference fitting.

It is not enough to position the bearing ring axially. Often, some suitable method is required to position the bearing ring axially. The inner and outer rings of the locating bearing should be axially fixed on both sides.

For non-locating bearings of non-separable structures, such as angular contact ball bearings, a bearing ring has a tight fit (usually an inner ring) and needs to be fixed axially; The other ring can be moved axially freely relative to its mounting surface. For non-locating bearings of separable construction, such as cylindrical roller bearings, the inner and outer rings need to be axially fixed.

In machine tool applications, the working end bearing typically transmits an axial load from the shaft to the housing to position the spindle. As a result, the bearings at the working end are usually positioned axially, while the bearings at the drive end are free to move axially. Positioning method: lock nut positioning method.

When mounting the inner ring of a bearing with an interference fit, one side of the inner ring is usually resting against the shoulder on the shaft and the other side is usually fixed with a lock nut (KMT or KMTA series) (see Fig. 9).

Bearings with tapered bore are mounted directly on the tapered journal and are usually fixed to the shaft with a lock nut. Spacer positioning method.

It is convenient to use spacers or spacers between the rings or between the rings and adjacent parts instead of the integral shoulders or housings (fig. 10). In these cases, dimensional and shape tolerances also apply to the part in question.

Stepped bushing positioning.

Another method of axial positioning of the bearing is the use of stepped bushings (fig. 11). These bushings are particularly suitable for precision bearing arrangements, providing less run-out and greater accuracy than threaded lock nuts. Stepped bushings are often used for very high-speed spindles, for which conventional locking devices do not provide sufficient accuracy.

Fixed end cap positioning method.

When mounting the outer ring of a bearing with an interference fit, one side of the outer ring is usually resting against the shoulder on the housing and the other side is fixed with a fixed end cover.

The retaining end cap and its set screws have a negative impact on bearing shape and performance in some cases. If the wall thickness between the housing and the screw hole is too small, or if the screw is too tight, the outer ring raceway may be deformed. The lightest ISO size series, the 19 series, is more susceptible to this type of damage than the 10 series or heavier.

It is advantageous to employ a large number of screws with small diameters. It should be avoided to use only 3 or 4 screws, which may form a bulge in the housing bore due to the small number of fastening points. This results in variable frictional moments, noise, and unstable preloads (when using angular contact ball bearings).

For spindles with complex designs, limited space, only thin-walled bearings and a limited number of screws. In these examples, it is advisable to carry out a precise check of the deformation by means of a FEM (Finite Element Method) analysis.

In addition, the axial clearance between the housing face and the end cover flange should also be checked. The guideline values are 10-15 m 100 mm housing bore diameter (fig. 12). Fig.9 Fig.10 Fig.11 Fig.12

Use a gas cutter to cut the coat, or remove all the bead racks inside, and remove the steel balls together.

Dismantle the ball bearing, remove the cage first, and "drive" the ball to one side, and the inner and outer rings are separated.

How do you say that? bai

You are going to be violent. Is it a force or a non-violent approach? zhi

Violence is just on the hammer dao subclass! Return.

If it is non-violent, dismantle the positioning circle, answer and squeeze again, and it will come out. Basically, you don't need to squeeze the beads to come out.

The full ball bearing is directly squeezed to deform the outer ring and slowly come out.

It's better for you to check how the bearings are made.

Break with a hammer, only violence.

How to take out the inner and outer rings of the bearing:

1. Half-shaft method: the two steel balls damaged by the bearing rolling element together with the inner ring on the half-shaft are symmetrically and evenly distributed in the outer ring of the bearing, and at the other end of the half-shaft casing, a slightly thicker hard wood block is padd, and the wooden block at the end of the half-shaft spline can be hit.

2. Iron plate horizontal and vertical method: the iron plate with a length of 50 cm, a width of 3 cm and a thickness of about 1 cm is placed in the outer ring of the bearing, one person pries the outer ring of the bearing, and one person uses an iron rod to hit the iron plate, and the corresponding direction of the iron plate is changed at any time.

3. Iron rod oblique hitting method: from the other end, the iron rod is obliquely into the groove of the outer ring of the bearing, and the groove of the outer ring of the bearing is changed from time to time.

4. Flat-mouth screwdriver method: when the outer ring of the bearing and the half-shaft sleeve are matched due to wear, the outer ring of the bearing can be disassembled by prying on the left and right sides of the flat-mouth screwdriver.

5. Heating method: heat the part around the half-shaft sleeve of the outer ring of the bearing to make it expand by heating, and the outer ring of the bearing can fall off.

6. Steel ball method: 3 steel balls or 4 steel balls and the inner ring in the rolling body of the damaged bearing are evenly distributed in the outer ring of the bearing, and from the other end of the half-shaft casing, use an iron rod slightly larger than the inner diameter of the bearing to tighten the inner diameter of the bearing, and hit it with a hammer.