JP2018096395A - Discrete type plural row angular ball bearing, outer ring assy and inner ring assy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discrete type plural row angular ball bearing, its outer ring assy and its inner ring assy showing a high dimensional accuracy and assuring compatibility between other outer ring assy and inner ring assy.SOLUTION: A discrete type plural row angular ball bearing 100 comprises an outer ring 116, an inner ring 118 and two rows of balls 120, 122. The outer ring 116 has a counter-bore shape 134 where a raceway groove 132 of two rows raceway grooves 130, 132 lacks a shoulder. The inner ring 118 has a counter-bore shape 142 where a raceway groove 140 of two rows raceway grooves 138, 140 lacks a shoulder. The outer ring assy 124 comprises the outer ring 116 and a row of balls 120 held in the raceway groove 130. The inner ring assy 126 comprises the inner ring 118 and a row of balls 122 held at the raceway groove 140. The balls 120 at the outer ring assy 124 show a feature that they have a size of predetermined assembly width accuracy in respect to a reference inner ring having an ideal shape having a nominal size.SELECTED DRAWING: Figure 2

Description

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

  Angular contact ball bearings can support radial load and axial load at the same time, but double row bearings in particular have high load capacity and high rigidity. For this reason, double-row angular contact ball bearings are often used in places where a relatively large load is applied, such as a pinion shaft of a differential gear (final reduction gear) of an automobile.

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

  Many double row angular contact ball bearings used for automobile parts are separable between an outer ring fixed on the housing side and an inner ring fixed on the shaft side. In the case of a separate type double row angular contact ball bearing, the outer ring is fixed to the housing in advance, and the inner ring is fixed to the shaft, so that the assembly work of the bearing can be completed in parallel with the operation of inserting the shaft into the housing. For this reason, it is possible to reduce the work effort as compared with the case where the shaft is inserted into the housing in the state where the firmly assembled non-separable bearing exists.

Japanese Patent No. 4058241

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

  In order to manage the inner ring and the outer ring of the bearing as described above, it is inevitably performed from the separation of the bearing to the reassembly in one line of a certain factory. However, according to recent subdivision and diversification of production processes, it is desirable that the assembly of the inner ring side parts and the assembly of the outer ring side parts can be performed separately. If the outer ring (or inner ring) of a bearing is compatible with the inner ring (or outer ring) of another bearing, the assembly of the inner ring side parts and the assembly of the outer ring side parts can be done on other lines, other factories, and even It is also possible to manufacture at production sites in different countries. Then, for example, it is possible to perform other processing on the shaft after fitting the inner ring to the shaft, and it is also possible to perform other processing after fitting the outer ring to the housing. 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 such problems, the present invention provides a separate type double row angular contact ball bearing having high dimensional accuracy and ensuring compatibility with other outer ring assemblies and inner ring assemblies, and an outer ring assembly and an inner ring assembly thereof. The purpose is that.

  In order to solve the above-described problems, a typical configuration of a separation type double row angular ball bearing according to the present invention is a separation type double row angular ball bearing including an outer ring, an inner ring, and two rows of balls. One of the track grooves in the row has a counter bore shape with a shoulder dropped, and the inner ring has a counter bore shape in which the other track groove in two rows has a shoulder dropped, and the outer ring and counter An outer ring assembly including a row of balls held in a raceway groove where no bore is formed is formed, and an inner ring assembly including an inner ring and a row of balls held in a raceway groove where no counterbore is formed is formed. The ball of the outer ring assembly is characterized in that it has a dimension that provides a predetermined assembly width accuracy with respect to the ideally shaped inner ring assembly having nominal dimensions.

  According to the said structure, the difference | error with respect to the nominal dimension of an outer ring | wheel is absorbed using a ball gauge (dimensional difference with the average diameter of a lot, and a nominal diameter), and the outer ring | wheel assembly close | similar to a nominal dimension is realizable. Therefore, the dimensional accuracy of the entire bearing can be increased, the simultaneous contact of two rows of balls can be ensured, and the quality can be improved.

  In order to solve the above-mentioned problems, another typical configuration of the separation type double row angular ball bearing according to the present invention is a separation type double row angular ball bearing including an outer ring, an inner ring, and two rows of balls. Is a counterbore shape in which one of the two rows of raceway grooves has a shoulder dropped, and the inner ring has a counterbore shape in which the other raceway groove of two rows of raceway grooves has a shoulder dropped, and the outer ring And an outer ring assembly including a row of balls held in a raceway groove where no counterbore is formed, and an inner ring assembly including an inner ring and a row of balls held in a raceway groove where no counterbore is formed The formed ball of the inner ring assembly is characterized in that it has a dimension that provides a predetermined assembly width accuracy with respect to an ideally shaped outer ring assembly having nominal dimensions.

  According to the said structure, the difference | error with respect to the nominal dimension of an inner ring | wheel is absorbed using a ball | bowl gauge, and the inner ring | wheel assembly close | similar to a nominal dimension is realizable. Therefore, the dimensional accuracy of the entire bearing can be increased, the simultaneous contact of two rows of balls can be ensured, and the quality can be improved.

  In order to solve the above-described problems, a representative configuration of an outer ring assembly according to the present invention is an outer ring assembly that is separably combined with a predetermined inner ring assembly to form a separable double-row angular ball bearing. The track groove on one side of the track groove has a counter bore shape with a shoulder dropped, and a row of balls is held in the track groove where the outer ring counter bore is not formed. The inner ring assembly is of a size that has a predetermined assembly width accuracy.

  Also with the above configuration, an error relative to the nominal size of the outer ring can be absorbed using the ball gauge, and an outer ring assembly closer to the nominal size can be realized. Therefore, it is possible to improve the dimensional accuracy and improve the quality of the entire bearing.

  In order to solve the above-described problems, a typical configuration of an inner ring assembly according to the present invention is an inner ring assembly that is detachably combined with a predetermined outer ring assembly to form a separable double-row angular ball bearing. The track groove on one side of the track groove has a counter bore shape with a shoulder, and a row of balls is held in the track groove where the counter bore of the inner ring is not formed. It is characterized in that it has a dimension with a predetermined assembly width accuracy with respect to an outer ring assembly of a typical shape.

  Also with the above configuration, an error relative to the nominal size of the inner ring can be absorbed using the ball gauge, and an inner ring assembly closer to the nominal size can be realized. Therefore, it is possible to improve the dimensional accuracy and improve the quality of the entire bearing.

  In order to solve the above-mentioned problems, another typical configuration of the separation type double row angular ball bearing according to the present invention is a separation type double row angular ball bearing including an outer ring, an inner ring, and two rows of balls. Is a counterbore shape in which one of the two rows of raceway grooves has a shoulder dropped, and the inner ring has a counterbore shape in which the other raceway groove of two rows of raceway grooves has a shoulder dropped, and the outer ring And an outer ring assembly including a row of balls held in a raceway groove where no counterbore is formed, and an inner ring assembly including an inner ring and a row of balls held in a raceway groove where no counterbore is formed The formed outer ring assembly ball is of a size that achieves a predetermined assembly width relative to the ideally shaped inner ring assembly of nominal dimensions, and the inner ring assembly ball is ideal of nominal dimensions. Shaped outer ring assembly And characterized in that the dimension a predetermined set width accuracy against.

  According to the said structure, the difference | error with respect to each nominal dimension of an outer ring | wheel and an inner ring | wheel is absorbed using a ball | bowl gauge, and the outer ring | wheel assembly and inner ring | wheel assembly which are closer to a nominal dimension are realizable. If the outer ring assembly and the inner ring assembly are close to these nominal dimensions, the assembly width accuracy as a bearing and simultaneous contact of balls can be ensured even when reassembled with other outer ring assemblies and inner ring assemblies after separation. In other words, the above configuration provides a highly compatible separation type double-row angular ball bearing that not only realizes a bearing with high dimensional accuracy, but also maintains the quality even if it is combined with other outer ring assemblies and inner ring assemblies after separation. can do.

  In the separated double-row angular contact ball bearing, the outer ring and the inner ring may be in contact with the ball at multiple points. Since the separated double-row angular contact ball bearing is guaranteed to have simultaneous contact of balls, it is possible to provide a bearing with higher load capacity and higher rigidity by setting multi-point contact such as 3 or 4 points. it can.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the isolation | separation type double row angular contact ball bearing with high dimensional accuracy, and the compatibility with the other outer ring | wheel assembly and inner ring | wheel assembly, its outer ring | wheel assembly, and inner ring | wheel assembly. .

It is a figure of the differential gear using the separation type double row angular contact ball bearing concerning the embodiment of the present invention. It is the figure which expanded and showed the separation type double row angular contact ball bearing of FIG. It is a figure explaining selection of a ball of an outer ring assembly. It is a figure explaining selection of a ball of an inner ring assembly. It is the figure which showed the modification of the separation type double row angular contact ball bearing.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are illustrated or described. Is omitted.

(Separable double-row angular contact ball bearing 100)
FIG. 1 is a diagram of a differential device 102 using a separated 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 pinion shaft 106 is rotatably supported by using the separated double-row angular ball bearing 100 and another angular ball bearing 104.

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

  The separation type double row angular ball bearing 100 is provided in the vicinity of the pinion gear 110. In the separation type double row angular ball bearing 100, an outer ring 116 is fixed to a housing 114, and an inner ring 118 is fixed to a pinion shaft 106. The angular 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 separated double-row angular contact ball bearing 100 of FIG. FIG. 2A shows an outline of the entire separation type double-row angular contact ball bearing 100. As shown in FIG. 2A, the separated double-row angular contact ball bearing 100 includes an outer ring 116, an inner ring 118, and two rows of balls 120 and 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 separation type double-row angular 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 separation type double-row angular ball bearing 100 can be separated by fixing the outer ring assembly 124 to the housing 114 (see FIG. 1) and the inner ring assembly 126 to the pinion shaft 106. The separable double-row angular ball bearing 100 is separable, so that not only the assembly operation of the housing 114 and the pinion shaft 106 is facilitated, but also the maintenance and reassembly operations are facilitated.

  FIG. 2B is a diagram showing the outer ring assembly 124 of FIG. The outer ring assembly 124 includes an outer ring 116, a row of balls 120, and a cage 128. In order to detachably combine the outer ring 116 with the inner ring assembly 126 (see FIG. 2A), the shoulder of the track groove 132 on one side of the two rows of track grooves 130, 132 is dropped, and the counter bore shape 134 is It is supposed to be provided. The ball 120 is held in a raceway groove 130 on which no counterbore is 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 includes an inner ring 118, a row of balls 122, and a cage 136. In order to detachably combine the inner ring 118 with the outer ring assembly 124 (see FIG. 2B), of the two rows of the race grooves 138 and 140, the other side of the race groove 132 (FIG. 2B) The shoulder of the track groove 138 is dropped to form a counter bore 142. The ball 122 is held in a raceway groove 140 where no counterbore is formed. The cage 136 enables separation from the outer ring assembly 124 while holding the row of balls 122 in the raceway groove 140.

  The separated double-row angular contact ball bearing 100 of this embodiment shown in FIG. 2 (a) has a gauge (the average diameter of the lot and the nominal diameter) of the balls 120 and 122 in accordance with 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. In the outer ring assembly 124, a ball gauge is selected for a reference inner ring, which will be described later, and in the inner ring assembly 126, which will be described later. The ball gauge is selected for the reference outer ring. Thereby, the interchangeability with the outer ring | wheel assembly and inner ring | wheel assembly of the other bearing of the same specification is securable. Hereinafter, the configuration of the outer ring assembly 124 and the inner ring assembly 126 will be further described.

(Outer ring assembly)
FIG. 3 is a view for explaining selection of balls of the outer ring assembly 124. FIG. 3A shows a state before selection of balls. In the present embodiment, the reference inner ring 144 is used to select the balls 120 provided on the outer ring assembly 124.

  The reference inner ring 144 is an ideally shaped inner ring assembly having nominal dimensions. For example, the width of the inner ring 146, the diameters and radii of curvature of the raceways 148 and 149, and the diameter of the ball 150 are all the reference inner ring 144, and the nominal dimensions of the separated double-row angular contact ball bearing 100 (see FIG. 2A) ( (Very small error). The outer ring assembly 124 uses the reference inner ring 144, and the ball dimensions (gauge) are set so that the assembly width accuracy and the simultaneous contact property of the two rows of balls when the separation type double row angular ball bearing 100 is assembled have predetermined values. ) Is selected.

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

  The bearing 154 measures various items such as dimensions with a measuring device. From the results of the measured values, since the reference inner ring 144 is formed with a very small error, the manufacturing error of the outer ring 116 is revealed. In particular, whether or not there is a difference between the track diameter d1 and the track diameter d2 for the two rows of track grooves 130 and 132, and whether or not the distance between the track diameters (pitch Pe) deviates from the nominal size. It turns out whether or not.

  When the raceway groove 130 is provided on the outer ring 116, an error may occur in the actual shape indicated by the solid line, compared to the ideal shape indicated by the broken line. As a result, for example, when the mutual difference Δdo (Δdo> 0) appears between the track diameter d1 and the track diameter d2, and the deviation value ΔPe (ΔPe> 0) with respect to the nominal dimension appears in the distance between the track diameters, the ball 152 May contact the inner ring 146, the ball 150 may not contact the outer ring 116. In this case, the outer ring 116 and the ball 150 are in contact with each other for the first time when an external force is applied to the bearing 154 and the corresponding displacement occurs, and the contact point is also deviated 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 (very small error), the contact delay amount of the outer ring assembly 124 can be absorbed by replacing the ball 152.

  FIG. 3B shows a 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, compared to the ball 152 before selection (see FIG. 3A), an axial clearance is obtained on the raceway groove 130 side of the outer ring 116, and both the raceway groove 132 and the ball 150 are initially set. Touch in a state close to the setting. As a result, the outer ring assembly 124 and the reference inner ring 144 can be simultaneously contacted.

  As described above, the outer ring assembly 124 can absorb errors such as the mutual difference Δdo in the track diameter of the outer ring 116 and the pitch deviation value ΔPe using the gauge of the ball 120. According to this embodiment, the outer ring assembly 124 closer to the nominal size can be realized. With this outer ring assembly 124, the dimensional accuracy of the separation type double row angular ball bearing 100 (see FIG. 2 (a)) can be improved, and the simultaneous contact of the two rows of 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. When the outer ring assembly 124 is combined not only with the specific inner ring assembly 126 (see FIG. 2A) but also with other inner ring assemblies. In addition, it is possible to realize the separated 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 as the ball 120, the outer ring assembly 124 and the reference inner ring 144 can be simultaneously contacted. As described above, according to the technical idea of the present embodiment, by selecting a ball gauge in accordance with the contact delay amount between the outer ring assembly 124 and the reference inner ring 144, the compatible outer ring assembly 124 and the separated type compound can be used. A row angular contact ball bearing 100 can be realized.

(Inner ring assembly)
FIG. 4 is a view for explaining selection of balls of the inner ring assembly 126. Fig.4 (a) has shown the state before selection of a ball | bowl. The inner ring assembly 126 is also formed by assembling the separation type double-row angular ball bearing 100 by using the reference outer ring 160 which is an outer ring assembly of an ideal shape having a nominal size in the same manner as the outer ring assembly 124 described above. The ball dimensions (gauge) are selected so that the width accuracy and the simultaneous contact of the two rows of balls have predetermined values.

  The reference outer ring 160 also has the width of the outer ring 162, the diameters and curvature radii of the raceways 164 and 166, and the diameter of the ball 168, all of which are the nominal dimensions of the separated double-row angular contact ball bearing 100 (see FIG. 2A) (very small). Error).

  Inner ring assembly 126 is also assembled with inner ring 118 and ball 170 of any gauge. The balls 170 are of an arbitrary gauge selected from the nominal dimensions of the balls of the separate type double row angular 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 of the bearing 172 and the like are measured by a measuring device, and a manufacturing error of the inner ring 118 is determined.

  For example, when the raceway groove 140 is provided in the inner ring 118, an error may occur in the actual shape indicated by the solid line compared to the ideal shape indicated 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 contacts the inner ring 118 for the first time, and the contact point also deviates from the initial setting. Such an error of the inner ring 118 indicates whether or not there is a difference between the track diameter D1 and the track diameter D2 with respect to the two rows of track grooves 138 and 140, and the mutual distance (pitch Pi) of the track diameters. It is determined whether 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 (very small error), the contact delay amount of the inner ring assembly 126 can be absorbed by replacing the ball 170.

  FIG. 4B shows a 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 to the ball 170 before selection (see FIG. 4A), and both the raceway groove 138 and the ball 168 are initially provided. Touch in a state close to the setting. As a result, the inner ring assembly 126 and the reference outer ring 160 can be simultaneously contacted. Further, when the ball 168 of the reference outer ring 160 hits first, by selecting a ball having a large gauge as the ball 122, the inner ring assembly 126 and the reference outer ring 160 can be simultaneously contacted.

  As described above, the inner ring assembly 126 can absorb errors such as the mutual difference ΔDo of the track diameter 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 separation type double row angular ball bearing 100 (see FIG. 2A) can be increased, and the simultaneous contact of the two rows of balls can be ensured to improve the quality. . Further, since the inner ring assembly 126 has high dimensional accuracy, the inner ring assembly 126 is highly compatible with other inner ring assemblies. When the inner ring assembly 126 is combined not only with the specific outer ring assembly 124 (see FIG. 2A) but also with other outer ring assemblies. In addition, it is possible to realize the separated double-row angular contact ball bearing 100 with high dimensional accuracy.

  As described above, the separated double-row angular contact ball bearing 100 shown in FIG. 2A uses the gauges of the balls 120 and 122 to absorb errors with respect to the nominal dimensions of the outer ring 116 and the inner ring 118, and thus is further named. The outer ring assembly 124 and the inner ring assembly 126 close to the dimensions are realized. If the outer ring assembly 124 and the inner ring assembly 126 are close to the nominal dimensions, the assembly width accuracy as a bearing and simultaneous contact of balls can be ensured even when reassembled with other outer ring assemblies and inner ring assemblies after separation. . As described above, the separated double-row angular contact ball bearing 100 not only achieves high dimensional accuracy, but also has a highly compatible structure that can maintain quality even if it is combined with other outer ring assemblies and inner ring assemblies after separation. Is realized.

(Modification)
FIG. 5 is a view showing a modification of the separation type double row angular ball bearing 100. Each modification shown in FIG. 5 is different in configuration from the separated double-row angular contact ball bearing 100 of FIG. 2A in the number of contact points of the balls. In the following description, components that have already been described are denoted by the same reference numerals and description thereof is omitted. Moreover, even if it is a component to which a different code | symbol was attached | subjected, the thing of the same name as the component already demonstrated shall have the same structure and function.

  In the separated 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 in contact with the balls 120 and 122 at three points. As described above, the outer ring assembly 124 and the inner ring assembly 126 are guaranteed to contact the balls 120 and 122 simultaneously. 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 the separated angular ball bearing 200 with higher load capacity and higher rigidity.

  In the separated 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 in contact with the balls 120 and 122 at four points. By adopting the outer ring 222 and the inner ring 224 that are in contact with the balls 120 and 122 at four points, it is possible to realize the separated angular ball bearing 220 having a higher load capacity and higher rigidity.

  In the separation type double row angular contact ball bearing 240 of the third modification shown in FIG. 5C, the outer ring 242 and the inner ring 244 are in contact with the ball 120 at two points and are in contact with the ball 122 at three points. Yes. 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 the separated angular ball bearing 240 having a higher load capacity and higher rigidity. .

  As described above, the technical idea of the separated double-row angular contact ball bearing 100 can also be realized as a multipoint contact bearing. As a result, it is possible to improve the load capacity and rigidity and to provide a bearing having a performance according to the purpose.

  Although the 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 will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

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

D1: Track diameter on the left side of the inner ring, D2: Track diameter on the right side of the inner ring, d1: Track diameter on the left side of the outer ring, d2: Track diameter on the right side of the outer ring, Pe: Pitch of the track diameter of the outer ring, Pi: Pitch of the inner ring Orbit diameter pitch, 100 ... separate double row angular contact ball bearing, 102 ... differential device, 104 ... angular contact ball bearing, 106 ... pinion shaft, 108 ... ring gear, 110 ... pinion gear, 112 ... flange, 114 ... housing, 116 ... Outer ring, 118 ... Inner ring, 120 ... Outer ring assembly ball, 122 ... Inner ring assembly ball, 124 ... Outer assembly assembly, 126 ... Inner assembly assembly, 128 ... Outer assembly assembly retainer, 130 ... Outer raceway track groove, 132 ... Outer assembly 138 ... Outer ring counter bore shape, 136 ... Inner ring assembly cage, 138 ... Inner ring left track groove, 140 ... Inner ring right track 142 ... Inner ring counter bore shape, 144 ... Reference inner ring, 146 ... Inner ring, 148 ... Left raceway surface, 149 ... Right raceway surface, 150 ... Base inner race ball, 152 ... Arbitrary ball, 154 ... Bearing, 160 Reference outer ring, 162 ... Outer ring, 164 ... Left raceway surface, 166 ... Right raceway surface, 168 ... Reference outer ring ball, 170 ... Arbitrary ball, 172 ... Bearing, 200 ... Separate double row of the first modification Angular contact ball bearings, 202 ... Outer ring, 204 ... Inner ring, 220 ... Separate type double row angular contact ball bearing of the second modification, 222 ... Outer ring, 224 ... Inner ring, 240 ... Separate type double row angular contact ball bearing of the second modification, 242 ... Outer ring, 244 ... Inner ring, Pi ... Pitch

Claims (6)

In a separate type double row angular contact ball bearing having an outer ring, an inner ring and two rows of balls,
The outer ring has a counter bore shape in which one of the two rows of raceway grooves has a shoulder dropped,
The inner ring has a counterbore shape in which the other side of the two rows of raceway grooves has a shoulder,
An outer ring assembly including the outer ring and a row of balls held in a raceway groove in which the counterbore is not formed is formed;
An inner ring assembly including the inner ring and a row of balls held in a raceway groove in which the counterbore is not formed;
The separation type double-row angular ball bearing characterized in that the outer ring assembly ball has a dimension that provides a predetermined assembly width accuracy with respect to an ideally shaped inner ring assembly having nominal dimensions. In a separate type double row angular contact ball bearing having an outer ring, an inner ring and two rows of balls,
The outer ring has a counter bore shape in which one of the two rows of raceway grooves has a shoulder dropped,
The inner ring has a counterbore shape in which the other side of the two rows of raceway grooves has a shoulder,
An outer ring assembly including the outer ring and a row of balls held in a raceway groove in which the counterbore is not formed is formed;
An inner ring assembly including the inner ring and a row of balls held in a raceway groove in which the counterbore is not formed;
The separation type double-row angular ball bearing characterized in that the ball of the inner ring assembly is of a size that provides a predetermined assembly width accuracy with respect to an ideally shaped outer ring assembly of nominal dimensions. 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 outer ring raceway grooves, one side raceway groove has a counterbore shape,
A row of balls is held in a raceway groove in which the counter bore of the outer ring is not formed,
The outer ring assembly is characterized in that the ball is of a size that provides a predetermined assembly width accuracy with respect to an ideally shaped inner ring assembly having nominal dimensions. 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 inner ring raceway grooves, one side raceway groove has a counterbore shape,
A row of balls is held in a raceway groove in which the counter bore of the inner ring is not formed,
The inner ring assembly is characterized in that the balls are of a size that provides a predetermined assembly width accuracy with respect to an ideally shaped outer ring assembly having nominal dimensions. In a separate type double row angular contact ball bearing having an outer ring, an inner ring and two rows of balls,
The outer ring has a counter bore shape in which one of the two rows of raceway grooves has a shoulder dropped,
The inner ring has a counterbore shape in which the other side of the two rows of raceway grooves has a shoulder,
An outer ring assembly including the outer ring and a row of balls held in a raceway groove in which the counterbore is not formed is formed;
An inner ring assembly including 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 is of a size that provides a predetermined assembly width accuracy with respect to an ideally shaped inner ring assembly having nominal dimensions,
The separation type double-row angular ball bearing characterized in that the ball of the inner ring assembly is of a size that provides a predetermined assembly width accuracy with respect to an ideally shaped outer ring assembly of nominal dimensions.   The separated double-row angular contact ball bearing according to claim 5, wherein the outer ring and the inner ring are capable of making multipoint contact with the ball.

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