JP7057485B2 - Separate double row angular contact ball bearings, outer ring assembly and inner ring assembly - Google Patents

Description

The present invention relates to a separate double row angular contact ball bearing and its outer ring assembly and inner ring assembly.

Angular contact ball bearings can support both radial and axial loads at the same time, but double-row bearings have a large load capacity and high rigidity. Therefore, double-row angular contact ball bearings are often used in places where a relatively large load is applied, such as pinion shafts of differential gears (final reducers) of automobiles, among vehicles and machines.

Patent Document 1 discloses a double-row angular contact ball bearing used in an automobile transfer. As shown in FIG. 2, in the double row angular contact ball bearing 16 of Patent Document 1, the outer ring side is fixed to the casing 1 and the inner ring side is fixed to the umbrella pinion shaft 5.

In many cases, double-row angular contact ball bearings used for automobile parts are separable between an outer ring fixed to the housing side and an inner ring fixed to the shaft side. In the case of separate double-row angular contact ball bearings, by fixing the outer ring to the housing and fixing the inner ring to the shaft in advance, the bearing assembly work can be completed in parallel with the work of inserting the shaft into the housing. Therefore, the labor of work can be reduced as compared with the case where the shaft is inserted into the housing in the presence of a firmly assembled non-separable type bearing.

Japanese Patent No. 4058241

However, although the outer and inner rings and balls (steel balls) of bearings used for automobile parts are processed under strict quality control as metal products, they are manufactured with the same nominal dimensions (standard values). Even if the products are in the same lot, there will be a slight dimensional difference. Therefore, in the conventional separate type double row angular contact ball bearing, it is necessary to manage the pair of the outer ring and the inner ring without eliminating the pair in order to maintain the dimensional accuracy in the completed state as the bearing. For example, in the assembly process of automobile parts, etc., the pair of inner ring and outer ring of a certain bearing is separated, the shaft is fitted to the inner ring, and after the outer ring is fitted to the housing, the shaft so that the inner ring and the outer ring return to the same pair again. And the housing were combined. In other words, the outer ring (or inner ring) of one bearing was not compatible with the inner ring (or outer ring) of another bearing, even for bearings of the same model number.

In order to manage the inner ring and outer ring of the bearing as described above, it is inevitable that one line of a certain factory will be used for bearing separation and reassembly. However, according to the subdivision and diversification of production processes in recent years, it is desirable that the parts on the inner ring side and the parts on the outer ring side can be assembled separately. If the outer ring (or inner ring) of one bearing is compatible with the inner ring (or outer ring) of another bearing, the parts on the inner ring side and the parts on the outer ring side can be assembled on other lines, other factories, and even. It will also be possible to manufacture at production bases in different countries. Then, for example, it becomes possible to fit the inner ring into the shaft and then perform other processing on the shaft, and it is also possible to fit the outer ring into the housing and then perform other processing. That is, the shaft can be produced at the shaft factory and the housing can be produced at the housing factory, and there is a great advantage that the production process is not restricted by installing the bearing.

In view of these problems, the present invention provides a separate double-row angular contact ball bearing having high dimensional accuracy and ensuring compatibility with other outer ring assemblies and inner ring assemblies, and the outer ring assembly and inner ring assembly thereof. The purpose is.

In order to solve the above problems, a typical configuration of the separate double-row angular contact ball bearing according to the present invention is a separate double-row angular contact ball bearing having an outer ring, an inner ring, and two rows of balls, in which the outer ring is two. The raceway groove on one side of the raceway grooves in the row has a counterbore shape with the shoulder dropped, and the inner ring has a counterbore shape in which the raceway groove on the other side of the raceway grooves in the two rows has the shoulder dropped. An outer ring assembly is formed that includes a row of balls held in the raceway groove without a bore, and an inner ring assembly is formed that includes an inner ring and a row of balls held in the raceway groove without a counterbore. The ball of the outer ring assembly is characterized in that the ball has a predetermined assembly width accuracy with respect to the inner ring assembly having an ideal shape having the nominal size.

According to the above configuration, an error with respect to the nominal size of the outer ring can be absorbed by using the ball gauge (dimension difference between the average diameter of the lot and the nominal diameter), and an outer ring assembly closer to the nominal size can be realized. Therefore, the dimensional accuracy of the bearing as a whole can be improved, the simultaneous contact property of the two rows of balls can be ensured, and the quality can be improved.

In order to solve the above problems, another typical configuration of the separated double-row angular contact ball bearing according to the present invention is an outer ring in a separate double-row angular contact ball bearing including an outer ring, an inner ring, and two rows of balls. Is a counterbore shape in which the raceway groove on one side of the two rows of raceway grooves has a shoulder dropped, and the inner ring has a counterbore shape in which the raceway groove on the other side of the raceway grooves in the two rows has a shoulder drop. And an outer ring assembly containing a row of balls held in a raceway groove without a counterbore is formed, and an inner ring assembly containing an inner ring and a row of balls held in a raceway groove without a counterbore is formed. The ball of the inner ring assembly, which is formed, is characterized in that the ball has a size having a predetermined assembly width accuracy with respect to the outer ring assembly having an ideal shape having a nominal size.

According to the above configuration, the ball gauge can be used to absorb an error with respect to the nominal size of the inner ring, and an inner ring assembly closer to the nominal size can be realized. Therefore, the dimensional accuracy of the bearing as a whole can be improved, the simultaneous contact property of the two rows of balls can be ensured, and the quality can be improved.

In order to solve the above problems, a typical configuration of the outer ring assembly according to the present invention is a two-row outer ring in an outer ring assembly that is separably combined with a predetermined inner ring assembly to form a separable double-row angular contact ball bearing. The raceway groove on one side of the raceway groove has a counterbore shape with the shoulder dropped, and a row of balls is held in the raceway groove where the counterbore of the outer ring is not formed, and the ball is ideally composed of nominal dimensions. It is characterized by having a size having a predetermined assembly width accuracy with respect to an inner ring assembly having a specific shape.

Even with the above configuration, an error with respect to the nominal size of the outer ring can be absorbed by using the ball gauge, and an outer ring assembly closer to the nominal size can be realized. Therefore, the dimensional accuracy of the bearing as a whole can be improved and the quality can be improved.

In order to solve the above problems, a typical configuration of the inner ring assembly according to the present invention is an inner ring assembly that is separably combined with a predetermined outer ring assembly to form a separable double-row angular contact ball bearing, in which two rows of inner rings are provided. The raceway groove on one side of the raceway groove has a counterbore shape with the shoulder dropped, and a row of balls is held in the raceway groove where the counterbore of the inner ring is not formed, and the ball is ideally composed of nominal dimensions. It is characterized in that it has a size that gives a predetermined assembly width accuracy with respect to an outer ring assembly having a specific shape.

Even with the above configuration, an error with respect to the nominal size of the inner ring can be absorbed by using the ball gauge, and an inner ring assembly closer to the nominal size can be realized. Therefore, the dimensional accuracy of the bearing as a whole can be improved and the quality can be improved.

In order to solve the above problems, another typical configuration of the separated double-row angular contact ball bearing according to the present invention is an outer ring in a separate double-row angular contact ball bearing including an outer ring, an inner ring and two rows of balls. Is a counterbore shape in which the raceway groove on one side of the two rows of raceway grooves has a shoulder dropped, and the inner ring has a counterbore shape in which the raceway groove on the other side of the raceway grooves in the two rows has a shoulder drop. And an outer ring assembly containing a row of balls held in a raceway groove without a counterbore is formed, and an inner ring assembly containing an inner ring and a row of balls held in a raceway groove without a counterbore is formed. The ball of the outer ring assembly that is formed has a size that has a predetermined assembly width accuracy with respect to the inner ring assembly having an ideal shape having the nominal size, and the ball of the inner ring assembly has an ideal shape having the nominal size. It is characterized in that it has a size that gives a predetermined assembly width accuracy to an outer ring assembly having a different shape.

According to the above configuration, the ball gauge can be used to absorb errors in the nominal dimensions of the outer ring and the inner ring, and an outer ring assembly and an inner ring assembly closer to the nominal dimensions can be realized. If the outer ring assembly and the inner ring assembly are close to these nominal dimensions, the assembly width accuracy as a bearing and the simultaneous contact of the balls can be guaranteed even when the outer ring assembly and the inner ring assembly are reassembled after separation. That is, with the above configuration, not only can a bearing with high dimensional accuracy be realized, but also a highly compatible separate double-row angular contact ball bearing that can maintain quality even if it is recombined with other outer ring assemblies and inner ring assemblies after separation is provided. can do.

In the separate type double row angular contact ball bearing, the outer ring and the inner ring may be capable of multipoint contact with the ball. Since the separate type double row angular contact ball bearing guarantees simultaneous contact of balls, it is possible to provide a bearing with larger load capacity and higher rigidity by setting multi-point contact such as 3 points or 4 points. can.

INDUSTRIAL APPLICABILITY According to the present invention, it becomes possible to provide a separate double-row angular contact ball bearing having high dimensional accuracy and ensuring compatibility with other outer ring assemblies and inner ring assemblies, and the outer ring assembly and inner ring assembly thereof. ..

It is a figure of the differential device which used the separated type double row angular contact ball bearing which concerns on embodiment of this invention. It is an enlarged view which showed the separated type double row angular contact ball bearing of FIG. It is a figure explaining the selection of the ball of the outer ring assembly. It is a figure explaining the selection of the ball of the inner ring assembly. It is a figure which showed the deformation example of the separated type double row angular contact ball bearing.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are illustrated or described. Is omitted.

(Separate type double row angular contact ball bearing 100)
FIG. 1 is a diagram of a differential device 102 using a separate double-row angular contact ball bearing 100 according to an embodiment of the present invention. In the differential device 102 shown in FIG. 1, the separate type double row angular contact ball bearing 100 and another angular contact ball bearing 104 are used to rotatably support the pinion shaft 106.

In the differential device 102, the ring gear 108 and the pinion gear 110 are meshed with each other. The pinion gear 110 is provided at one end of the pinion shaft 106 (gear shaft), and a flange 112 (also referred to as a companion flange or a connecting flange) is provided at the other end of the pinion shaft 106. The flange 112 is a portion connected to a propeller shaft (not shown). A housing 114 is provided on the outside of the pinion shaft 106 and the pinion gear 110.

The separate double row angular contact ball bearing 100 is provided in the vicinity of the pinion gear 110. In the separate type double row angular contact ball bearing 100, the outer ring 116 is fixed to the housing 114, and the inner ring 118 is fixed to the pinion shaft 106. The angular contact ball bearing 104 is provided in the vicinity of the flange 112 (on the side of the pinion shaft 106 opposite to the pinion gear 110).

FIG. 2 is an enlarged view of the separate double row angular contact ball bearing 100 of FIG. 1. FIG. 2A shows an overall outline of the separate type double row angular contact ball bearing 100. As shown in FIG. 2A, the separate double-row angular contact ball bearing 100 has an outer ring 116, an inner ring 118, and two rows of balls 120, 122 formed between the outer ring 116 and the inner ring 118. I have. In the present embodiment, the balls 120 and 122 have the same nominal diameter and the same pitch diameter.

The separate double row angular contact ball bearing 100 is separable into an outer ring assembly 124 including an outer ring 116 and a ball 120 and an inner ring assembly 126 including an inner ring 118 and a ball 122. The separate type double row angular contact ball bearing 100 can be separated by fixing the outer ring assembly 124 to the housing 114 (see FIG. 1) and fixing the inner ring assembly 126 to the pinion shaft 106. The separable double-row angular contact ball bearing 100 is separable, which not only facilitates the assembly work of the housing 114 and the pinion shaft 106, but also facilitates the maintenance and reassembly work thereof.

FIG. 2B is a diagram showing the outer ring assembly 124 of FIG. 2A alone. The outer ring assembly 124 is composed of an outer ring 116, a row of balls 120, and a cage 128. In order to separably combine the outer ring 116 with the inner ring assembly 126 (see FIG. 2A), the shoulder of the raceway groove 132 on one side of the two rows of raceway grooves 130 and 132 is dropped, and the counter bore shape 134 is formed. It is supposed to be provided. The ball 120 is held in the track groove 130 in which the counter bore is not formed. The cage 128 enables separation from the inner ring assembly 126 while holding the row of balls 120 in the raceway groove 130.

FIG. 2 (c) is a diagram showing the inner ring assembly 126 of FIG. 2 (a) alone. The inner ring assembly 126 is composed of an inner ring 118, a row of balls 122, and a cage 136. The inner ring 118 is separably combined with the outer ring assembly 124 (see FIG. 2B), so that the inner ring 118 is on the other side of the two rows of raceway grooves 138 and 140 with respect to the raceway groove 132 (FIG. 2B). The shoulder of the track groove 138 is dropped to form a counter bore shape 142. The ball 122 is held in the track groove 140 in which the counter bore is not formed. The cage 136 enables separation from the outer ring assembly 124 while holding the row of balls 122 in the raceway groove 140.

In the separate double row angular contact ball bearing 100 of the present embodiment shown in FIG. 2A, the gauges of the balls 120 and 122 (the average diameter and the nominal diameter of the lot) are adjusted to match the manufacturing errors of the outer ring 116 and the inner ring 118. Dimensional difference) is selected. What is important here is that the outer ring assembly 124 and the inner ring assembly 126 each have a row of balls, and in the outer ring assembly 124, a ball gauge is selected for the reference inner ring described later, and in the inner ring assembly 126, the ball gauge is selected, which will be described later. It means that the gauge of the ball is selected for the standard outer ring. This makes it possible to ensure compatibility with the outer ring assembly and the inner ring assembly of other bearings of the same standard. Hereinafter, the configurations of the outer ring assembly 124 and the inner ring assembly 126 will be further described.

(Outer ring assembly)
FIG. 3 is a diagram illustrating selection of balls for the outer ring assembly 124. FIG. 3A shows a state before selection of balls. In this embodiment, the reference inner ring 144 is used to select the ball 120 provided in the outer ring assembly 124.

The reference inner ring 144 is an inner ring assembly having an ideal shape having nominal dimensions. For example, the reference inner ring 144 has the width of the inner ring 146, the diameter and radius of curvature of the raceway surface 148, 149, and the diameter of the ball 150, all of which are the nominal dimensions of the separate double row angular contact ball bearing 100 (see FIG. 2A). It is formed with a very small error). The outer ring assembly 124 uses the reference inner ring 144, and the ball dimensions (gauge) so that the assembly width accuracy and the simultaneous contact property of the two rows of balls when the separate double row angular contact ball bearing 100 is assembled become predetermined values. ) Is selected.

In order to select the gauge of the ball, first, the outer ring assembly 124 is assembled with the outer ring 116 and an arbitrary ball 152. The ball 152 is of an arbitrary gauge selected from the nominal size of the ball of the separate type double row angular contact ball bearing 100. Then, the outer ring assembly 124 is paired with the reference inner ring 144 to form the bearing 154.

The bearing 154 measures various items such as dimensions with a measuring device. From the results of the measured values, the manufacturing error of the outer ring 116 can be found because the reference inner ring 144 is formed with an extremely small error. In particular, whether or not there is a mutual difference between the track diameters d1 and the track diameters d2 with respect to the two rows of track grooves 130 and 132, and whether the mutual distances (pitch Pe) of the track diameters deviate from the nominal dimensions. It turns out whether or not.

When the raceway groove 130 is provided in the outer ring 116, an error may occur in the actual shape shown by the solid line as compared with the ideal shape shown by the broken line. As a result, for example, when the mutual difference Δdo (Δdo> 0) appears between the orbital diameter d1 and the orbital diameter d2, and the deviation value ΔPe (ΔPe> 0) with respect to the nominal dimension appears in the mutual distance of the orbital diameters, the ball 152. May not contact the outer ring 116 even if the ball 150 is in contact with the inner ring 146. In this case, the outer ring 116 and the ball 150 come into contact with each other only when an external force is applied to the bearing 154 and a displacement corresponding to the force is generated, and the contact point also deviates from the initial setting. The contact delay amount between the outer ring 116 and the ball 150 at this time can be calculated by obtaining the mutual difference Δdo and the deviation value ΔPe.

Simultaneous contact between the outer ring assembly 124 and the reference inner ring 144 can be achieved by absorbing the mutual difference Δdo and the deviation value ΔPe. Since the ball 150 of the reference inner ring 144 has a nominal size (extremely small error), the contact delay amount of the outer ring assembly 124 can be absorbed by replacing the ball 152.

FIG. 3B shows the state after the ball is selected. A gauge is selected based on the contact delay amount when the ball 152 (see FIG. 3A) is installed, and for example, a ball 120 having a small size is selected. According to the ball 120 after selection, an axial clearance is obtained on the raceway groove 130 side of the outer ring 116 as compared with the ball 152 before selection (see FIG. 3A), and both the raceway groove 132 and the ball 150 are initially. Contact in a state close to the setting of. This enables simultaneous contact between the outer ring assembly 124 and the reference inner ring 144.

As described above, the outer ring assembly 124 can absorb errors such as the mutual difference Δdo of the track diameters of the outer ring 116 and the deviation value ΔPe of the pitch by using the gauge of the ball 120. According to this embodiment, the outer ring assembly 124 that is closer to the nominal size can be realized. With this outer ring assembly 124, the dimensional accuracy of the separate double-row angular contact ball bearing 100 (see FIG. 2A) can be improved, and the simultaneous contact property of the two-row balls can be ensured to improve the quality. .. Further, since the outer ring assembly 124 has high dimensional accuracy, it has high compatibility with other outer ring assemblies, and when combined with not only a specific inner ring assembly 126 (see FIG. 2A) but also another inner ring assembly. Also, it is possible to realize a separate type double row angular contact ball bearing 100 with high dimensional accuracy.

In the case of FIG. 3A, depending on the degree of manufacturing error of the outer ring 116, the ball 150 of the reference inner ring 144 first contacts the outer ring assembly 124, and the ball on the outer ring assembly 124 side does not contact the reference inner ring 144. In some cases. In that case, by selecting a ball having a large gauge for the ball 120, simultaneous contact between the outer ring assembly 124 and the reference inner ring 144 becomes possible. As described above, according to the technical idea of the present embodiment, by selecting the ball gauge according to the contact delay amount between the outer ring assembly 124 and the reference inner ring 144, the outer ring assembly 124 and the separate type double are compatible. A row angular contact ball bearing 100 can be realized.

(Inner ring assembly)
FIG. 4 is a diagram illustrating selection of balls for the inner ring assembly 126. FIG. 4A shows a state before selection of balls. The inner ring assembly 126 is also a set when the separate type double row angular contact ball bearing 100 is assembled by using the reference outer ring 160 which is an outer ring assembly having an ideal shape having nominal dimensions by the same method as the outer ring assembly 124 described above. The size (gauge) of the balls is selected so that the width accuracy and the simultaneous contact of the balls in two rows have predetermined values.

The reference outer ring 160 also has the nominal dimensions (extremely small) of the separate double row angular contact ball bearing 100 (see FIG. 2A) in that the width of the outer ring 162, the diameter and radius of curvature of the raceway surfaces 164 and 166, and the diameter of the ball 168 are all. It is formed by error).

The inner ring assembly 126 is also assembled with the inner ring 118 and a ball 170 of an arbitrary gauge. The balls 170 are of any gauge selected from the nominal dimensions of the balls of the separate double row angular contact ball bearing 100. Then, the inner ring assembly 126 and the reference outer ring 160 are paired to form a bearing 172. Then, the dimensions and the like of the bearing 172 are measured by the measuring device, and the manufacturing error of the inner ring 118 is determined.

For example, even when the raceway groove 140 is provided in the inner ring 118, an error may occur in the actual shape shown by the solid line as compared with the ideal shape shown by the broken line. In that case, even if the ball 170 is in contact with the outer ring 162, the ball 168 may not be in contact with the inner ring 118. Then, when an external force is applied to the bearing 172, the ball 168 and the inner ring 118 come into contact with each other for the first time, and the contact point also deviates from the initial setting. Whether or not such an error of the inner ring 118 causes a mutual difference between the track diameter D1 and the track diameter D2 with respect to the two rows of raceway grooves 138 and 140, and the mutual distance (pitch Pi) of the raceway diameters. It is determined by whether or not it deviates from the nominal size.

Simultaneous contact between the inner ring assembly 126 and the reference outer ring 160 can also be achieved by absorbing the mutual difference ΔDo and the deviation value ΔPi. Since the ball 168 of the reference outer ring 160 has a nominal size (extremely small error), the contact delay amount of the inner ring assembly 126 can be absorbed by replacing the ball 170.

FIG. 4B shows the state after the ball is selected. For example, a small gauge ball 122 is selected based on the contact delay amount when the ball 170 (see FIG. 4A) is installed. According to the ball 122 after selection, an axial clearance is obtained on the raceway groove 140 side of the inner ring 118 as compared with the ball 170 before selection (see FIG. 4A), and both the raceway groove 138 and the ball 168 are initially. Contact in a state close to the setting of. This enables simultaneous contact between the inner ring assembly 126 and the reference outer ring 160. Further, when the ball 168 of the reference outer ring 160 hits first, by selecting a ball having a large gauge for the ball 122, the inner ring assembly 126 and the reference outer ring 160 can be in contact with each other at the same time.

As described above, the inner ring assembly 126 can absorb errors such as the mutual difference ΔDo of the track diameters of the inner ring 118 and the deviation value ΔPi of the pitch by using the gauge of the ball 122. According to this embodiment, the inner ring assembly 126 closer to the nominal size can be realized. With this inner ring assembly 126, the dimensional accuracy of the separate double-row angular contact ball bearing 100 (see FIG. 2A) can be improved, and the simultaneous contact property of the two-row balls can be ensured to improve the quality. .. Further, since the inner ring assembly 126 has high dimensional accuracy, it has high compatibility with other inner ring assemblies, and when combined with not only a specific outer ring assembly 124 (see FIG. 2A) but also another outer ring assembly. Also, it is possible to realize a separate type double row angular contact ball bearing 100 with high dimensional accuracy.

As described above, the separate double-row angular contact ball bearing 100 of FIG. 2A uses the gauges of the balls 120 and 122 to absorb errors in the nominal dimensions of the outer ring 116 and the inner ring 118, and is more named. The outer ring assembly 124 and the inner ring assembly 126, which are close to the dimensions, are realized. If the outer ring assembly 124 and the inner ring assembly 126 are close to these nominal dimensions, the assembly width accuracy as a bearing and the simultaneous contact of the balls can be guaranteed even when the outer ring assembly 124 and the inner ring assembly 126 are reassembled after separation. .. As described above, the separate type double row angular contact ball bearing 100 not only realizes high dimensional accuracy, but also has a highly compatible structure that can maintain the quality even if it is recombined with other outer ring assemblies and inner ring assemblies after separation. Has been realized.

(Modification example)
FIG. 5 is a diagram showing a modified example of the separate type double row angular contact ball bearing 100. Each modification shown in FIG. 5 has a different configuration from the separate double row angular contact ball bearing 100 shown in FIG. 2A in terms of the number of contact points of the balls. In the following description, the components already described will be designated by the same reference numerals, and the description thereof will be omitted. Further, even if the components have different reference numerals, those having the same name as the components already described shall have the same structure and function.

In the separate double-row angular contact ball bearing 200 of the first modification shown in FIG. 5A, the outer ring 202 and the inner ring 204 are configured to make three-point contact with the balls 120 and 122. As described above, the outer ring assembly 124 and the inner ring assembly 126 are guaranteed to have the balls 120 and 122 in contact with each other at the same time. Therefore, by adopting the outer ring 202 and the inner ring 204 that come into contact with the balls 120 and 122 at three points, it is possible to realize a separate type angular contact ball bearing 200 having a larger load capacity and higher rigidity.

In the separate double-row angular contact ball bearing 220 of the second modification shown in FIG. 5B, the outer ring 222 and the inner ring 224 are configured to come into contact with the balls 120 and 122 at four points. By adopting the outer ring 222 and the inner ring 224 that come into contact with the balls 120 and 122 at four points, it is possible to realize a separate angular contact ball bearing 220 having a larger load capacity and higher rigidity.

In the separate double-row angular contact ball bearing 240 of the third modification shown in FIG. 5 (c), the outer ring 242 and the inner ring 244 are configured to contact the ball 120 at two points and contact the ball 122 at three points. There is. As described above, by adopting the outer ring 242 and the inner ring 244 having different numbers of contact points according to the balls 120 and 122, it is possible to realize a separate angular contact ball bearing 240 having a larger load capacity and higher rigidity. ..

As described above, the technical idea of the separate type double row angular contact ball bearing 100 can be realized as a multi-point contact bearing. This makes it possible to improve the load capacity and rigidity and provide bearings with performance according to the purpose.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

The present invention can be applied to a separate type double row angular contact ball bearing and its outer ring assembly and inner ring assembly.

D1 ... the raceway diameter on the left side of the inner ring, D2 ... the raceway diameter on the right side of the inner ring, d1 ... the raceway diameter on the left side of the outer ring ring, d2 ... the raceway diameter on the right side of the outer ring, Pe ... the pitch of the raceway diameter of the outer ring, Pi ... Track diameter pitch, 100 ... Separable double row angular contact ball bearings, 102 ... Differential device, 104 ... Angular contact ball bearings, 106 ... Pinion shaft, 108 ... Ring gear, 110 ... Pinion gear, 112 ... Flange, 114 ... Housing, 116 ... Outer ring, 118 ... Inner ring, 120 ... Outer ring assy ball, 122 ... Inner ring assy ball, 124 ... Outer ring assy, 126 ... Inner ring assy, 128 ... Outer ring assy cage, 130 ... Outer ring left track groove, 132 ... Outer ring Right side bearing groove, 134 ... Outer ring counterbore shape, 136 ... Inner ring assembly cage, 138 ... Inner ring left side bearing groove, 140 ... Inner ring right side raceway groove, 142 ... Inner ring counterbore shape, 144 ... Reference inner ring, 146 ... Inner ring, 148 ... Left track surface, 149 ... Right track surface, 150 ... Reference inner ring ball, 152 ... Arbitrary ball, 154 ... Bearing, 160 ... Reference outer ring, 162 ... Outer ring, 164 ... Left side Raceway surface 166 ... Right side raceway surface 168 ... Reference outer ring ball, 170 ... Arbitrary ball, 172 ... Bearing, 200 ... Separated double row angular contact ball bearing of the first modification, 202 ... Outer ring, 204 ... Inner ring , 220 ... Separated double row angular contact ball bearings of the second modification, 222 ... Outer ring, 224 ... Inner ring, 240 ... Separated double row angular contact ball bearings of the second modification, 242 ... Outer ring, 244 ... Inner ring, Pi ... Pitch

Claims (3)

In a separate double-row angular contact ball bearing with an outer ring, an inner ring and two rows of balls.
The outer ring has a counterbore shape in which the raceway groove on one side of the two rows of raceway grooves has a shoulder dropped.
The inner ring has a counterbore shape in which the raceway groove on the other side of the two rows of raceway grooves has a shoulder dropped.
An outer ring assembly is formed that includes the outer ring and a row of balls held in a raceway groove in which the counterbore is not formed.
An inner ring assembly is formed that includes the inner ring and a row of balls held in a raceway groove in which the counterbore is not formed.
The ball of the outer ring assembly has a size having a predetermined assembly width accuracy with respect to the inner ring assembly having an ideal shape having a nominal size.
The ball of the inner ring assembly has a size having the predetermined assembly width accuracy with respect to the outer ring assembly having an ideal shape having the nominal size.
The outer ring assembly is compatible not only with the specific inner ring assembly but also with other inner ring assemblies.
The inner ring assembly is a separate type double row angular contact ball bearing characterized in that it is compatible not only with the specific outer ring assembly but also with other outer ring assemblies. In an outer ring assembly that is separably combined with a predetermined inner ring assembly to form a separate double-row angular contact ball bearing.
Of the two rows of raceway grooves on the outer ring, the raceway groove on one side has a counterbore shape with the shoulder dropped.
A row of balls is held in the raceway groove of the outer ring in which the counter bore is not formed.
The ball has a size having a predetermined assembly width accuracy with respect to an inner ring assembly having an ideal shape having a nominal size.
The inner ring assembly has a counterbore shape in which the raceway groove on the other side of the two rows of raceway grooves of the inner ring has a shoulder dropped, and a row of balls is held in the raceway groove in which the counterbore of the inner ring is not formed. The ball has a size having a predetermined assembly width accuracy with respect to an ideally shaped outer ring assembly having a nominal size.
The outer ring assembly is characterized in that it is compatible not only with the specific inner ring assembly but also with other inner ring assemblies. In an inner ring assembly that is separably combined with a predetermined outer ring assembly to form a separate double-row angular contact ball bearing.
Of the two rows of raceway grooves on the inner ring, the raceway groove on one side has a counterbore shape with the shoulder dropped.
A row of balls is held in a raceway groove in which the counter bore is not formed in the inner ring.
The ball has a size having a predetermined assembly width accuracy with respect to an outer ring assembly having an ideal shape having a nominal size.
The outer ring assembly has a counterbore shape in which the raceway groove on the other side of the two rows of raceway grooves of the outer ring has a shoulder dropped, and a row of balls is held in the raceway groove in which the counterbore of the outer ring is not formed. The ball has a size having a predetermined assembly width accuracy with respect to an inner ring assembly having an ideal shape having a nominal size.
The inner ring assembly is characterized in that it is compatible not only with the specific outer ring assembly but also with other outer ring assemblies.

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