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Angular contact ball bearings

An angular contact ball bearing, axial technology, applied in the direction of shafts and bearings, bearing elements, roller bearings, etc., can solve the problems of size increase and area increase in the height direction, and achieve large preload load, increased bearing capacity, The effect of increasing the contact angle

Active Publication Date: 2018-09-14
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, since the required floor area of ​​the machine tool increases and the dimension in the height direction increases, there is a limit to the size of the bearing and the increase in the number of columns.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 2 approach

[0124] Figure 7 A double row angular contact ball bearing 1a according to a second embodiment of the present invention is shown. In addition, the same code|symbol is attached|subjected to the same or equivalent part as 1st Embodiment, and description is abbreviate|omitted or simplified.

[0125] Such as Figure 7 As shown, in this embodiment, in consideration of the assemblability to a mechanical device, it is a double row angular contact ball bearing arranged in combination on the back, which has: a single outer ring 10a having a pair of outer ring raceway surfaces 11, 11; A pair of inner rings 20, 20 with inner ring raceway surfaces 21, 21; a plurality of balls 3 arranged in double rows between the pair of outer ring raceway surfaces 11, 11 and the pair of inner ring raceway surfaces 21, 21; And the cage 30 of the ball guide type having a plurality of pockets 34 holding a plurality of balls 3 respectively. A flange portion 14 for fixing is provided on the outer ring 10 a...

no. 3 approach

[0130] Figure 9 (a) and (b) show the double row angular contact ball bearing 1b concerning 3rd Embodiment of this invention. In addition, the same code|symbol is attached|subjected to the same or equivalent part as 1st Embodiment, and description is abbreviate|omitted or simplified.

[0131] Such as Figure 9 As shown in (a), in this embodiment, it is a double-row angular contact ball bearing 1b arranged in frontal combination, including: a pair of outer rings 10 respectively having outer ring raceway surfaces 11, 11; a pair of inner rings A single inner ring 20a on raceway surfaces 21, 21; a plurality of balls 3 arranged in double rows between a pair of outer ring raceway surfaces 11, 11 and a pair of inner ring raceway surfaces 21, 21; The cage 30 is a ball guide type cage 30 with a plurality of pockets 34 for the balls 3 .

[0132] In this case, the outer rings 10 , 10 are disassembled and the outer rings 10 , 10 are adjusted and polished in order to adjust the preload ...

Embodiment 1

[0138] Figure 10 Example 1 of the angular contact ball bearing for supporting a ball screw in which the outer ring of the second embodiment is integrated and the inner ring is divided into two is shown. In this case, various specifications and dimensions of the angular contact ball bearing are set as follows.

[0139] Contact angle α: 50°

[0140] Ball diameter Da: 6.35mm

[0141] Ae (=radial height He / ball diameter Da of outer ring groove shoulder): 0.38

[0142] Ai (=radial height Hi / ball diameter Da of inner ring groove shoulder): 0.38

[0143] Cage material: polyamide resin

[0144] Radius R1 of curvature of the axial side surface 35a of the outer diameter side column portion 35: 0.27×Da (1.7mm)

[0145] Radius R2 of curvature of axial side surface 36a of inner diameter side column portion 36: 0.27×Da (1.7mm)

[0146] Outer diameter side pocket diameter φDo: 0.80×Da (5.08mm)

[0147] Inner diameter side pocket diameter φDi: 0.80×Da (5.08mm)

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Abstract

The invention discloses an angular contact ball bearing capable of increasing the ball number when guaranteeing the rigidity of a cage to improve axial bearing capacity. A first ring part (31) is arranged on the radial outer side of a second ring part (32). A support column (33) has an outer diameter side column part (35) axially extending from the first ring part to the side of the second ring part, and an inner diameter side column part (36) axially extending from the second ring part to the side of the first ring part and formed by connecting the inner peripheral surface of the outer diameter side column part with the outer peripheral surface of the inner diameter side column part. The outer peripheral surface of the outer diameter side column part and an edge part (P1) of an axial side surface (35a), near the second ring part, of the outer diameter side column part are positioned on the side of the second ring part in the axial direction compared with a center (O) of a ball (3); and the inner peripheral surface of the inner diameter side column part and an edge part (P2) of an axial side surface (36a), near the first ring part, of the inner diameter side column part are positioned on the side of the first ring part in the axial direction compared with the center of the ball.

Description

technical field [0001] The invention relates to angular contact ball bearings. Background technique [0002] In CNC lathes, milling machines, machining centers, compound processing machines, five-axis processing machines and other machine tools, electric injection molding machines, punching machines, etc., the spindle box of the punching machine, etc., and the linear feed mechanism of the base on which the workpiece is loaded, use the rotary motion Ball screw converted to linear motion. As a bearing that rotatably supports the shaft end of the ball screw, an angular contact ball bearing is used (for example, refer to Patent Document 1). Among these bearings, bearings having a bearing inner diameter of approximately φ10 mm to φ200 mm are used depending on the size of the headstock of the machine tool used and the base on which the workpiece is loaded. [0003] The cutting load generated during machining, and the inertial load when the headstock and base are moved by rapid a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/46F16C33/58F16C19/30
Inventor 胜野美昭甲斐研吾樱井正博
Owner NSK LTD
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