Abstract:
Linear roller bearing assemblies can include a hub, a collar around the hub and roller bearing sub-assemblies disposed in a radial pattern around the hub. The roller bearing sub-assemblies can guide linear movement of the hub relative to the collar along a selected direction. Each roller bearing sub-assembly can include a roller and straps wrapped partially around the roller. Each strap is connected to at least one of the hub and the collar. And at least one of the straps can be connected to the roller while at least one of the straps can be circumferentially free of the roller. The hub and collar are moveable relative to each other along the selected direction for a distance that is approximately half of a circumference of the roller. Methods of forming linear roller bearing assemblies are also disclosed, as are multi-cylinder Stirling engines and a thermal energy recovery system.
Abstract:
Method for assembling a rollingbearing A method for assembling a rolling bearing by deformation of the outer ring (OR) and/or the inner ring (IR)comprising, before said step ofdeformation, determining the theoretical position(1', 2')that the two extreme rolling elements should occupy so as to allow inserting at least one supplemental rolling element(11)in said space (13), said theoretical positiondefining an acute applicationangle(?2) determining the value of forces(F1)to be applied from outside to said outer ring(OR)at three application points, one central point at said nearest or contact location ofboth inner an outer rings in said symmetryplane and two lateralpoints at an angle (2α2) equal to the double of said acute application angle withrespect to said symmetry plane, verifying that the deformation of the outer ring(OR)resulting from the application of said forces remains elasticand in that case, applying said forces and inserting at least one supplemental rolling element in said space.
Abstract:
In a wheel support rolling bearing unit producing method and producing device, in order to prevent indentations from being formed in a second outer ring raceway (6a) and in a second inner ring raceway (12a) when a crimp (14) is to be formed in the end of a hub main body (8a) by orbital forging using a pressing die (26) while preventing the upsizing of the installation, according to the invention the outer ring (1a) is rotated by a motor (48) to cause balls (32) to make an orbital motion. A difference is provided between the orbital motion speed of the balls (32) and the whirling speed of the pressing die (26). Preferably, this difference should be 10 min or more. The orbital motion of the balls (32) prevents indentations from being formed in the second outer ring raceway (6a) and in the second inner ring raceway (12a). Further, the provision of the difference between the orbital motion speed and the whirling speed of the pressing die (26) suppresses an increase in the torque required for rotation drive of the outer ring (1a).
Abstract:
An application tool (150) (and a method of use of the tool) is provided for assembling an outboard seal (134) and roller assembly (6) into a hub unit (4). The tool and method allow for the use of standard seals and standard cage/roller assemblies, thus avoiding the problem associated with the use of special cages or oversized large-diameter seals.
Abstract:
Die Erfindung betrifft einen Außenring (16) für ein Rollenlager, mit einer aus einem Wälzlagerstahl hergestellten Laufbahn. Erfindungsgemäß besteht der Außenring (16) aus einem zu einem Laufbahnrohr (4, 12, 14) gewickelten Blechband (1, 5) und einem damit verbundenen, das Laufbahnrohr (4, 12, 14) außenseitig umgebenden Hüllrohr (9, 13, 15, 17).
Abstract:
A lightweight hybrid bearing assembly (110; 210; 310) and method of making thereof is disclosed. The bearing assembly includes an inner race (124; 224; 324) and an outer race (126; 226; 326) radially spaced from the inner race. One or both of the inner race and the outer race have a convex bearing surface (150, 148; 250, 248; 350). Between the inner race and the outer race, a plurality of ceramic roller elements (128; 228; 328) are received. The ceramic roller elements have a concave bearing surface (146; 246; 346) that engages the convex bearing surface or surfaces. Among other things, this accommodates axial misalignment of the races relative to one another.
Abstract:
A method of forming an annular collar (11) that is essentially radial on the hollow annular end portion (12) of a part (7), said method comprising the following steps: - radially deforming the end portion (12) by means of a first tool (16), the axis (18) of the tool (16) and the axis (5) of the end portion (12) forming a non-zero angle α between them, so as to obtain a collar preform (17) that is essentially radial; and -deploying said preform (17) by means of a second tool (23), so as to obtain final shaping of the collar (11) by pressing. The invention also relates to a method of retaining a bearing (1) on a shaft (7), and to an assembly comprising a shaft (7) and a bearing (1).
Abstract:
This bearing device comprises an outer wheel (1) having a plurality of lines of rolling surfaces (1a, 1b) formed in the internal circumferential surface thereof, an inner wheel (3) having a rolling surface (3a) formed in the external circumferential surface thereof in such a manner as to confront the rolling surface (1b) of the outer wheel (1), an axle (2) having a rolling surface (2a) confronting the rolling surface (1a) of the outer wheel (1) and a press fitting portion (2c) for press fitting the inner wheel (3) which are formed continuously in the external circumferential surface thereof, the press fitting portion (2c) being so formed via a holder portion (2b), a plurality of lines of balls (4a, 4b) interposed between the outer wheel (1) and the axle (2) and the inner wheel (3), retainers (5a, 5b) for retaining the balls (4a, 4b), and a nut (6) screwed over the external circumferential surface of an end of the axle (2). An end surface (2e) of the press fitting portion (2c) of the axle (2) is worked with high precision so as to constitute a reference surface for measuring a negative gap of the bearing after the constituent parts are assembled together. The inner wheel (3) is press fitted into the press fitting portion (2c) of the axle (2) and secured by means of the nut (6) which is screwed on a thread portion (2d) of the axle (2). In this axle bearing device, the inner wheel (3) is in abutment with the shoulder portion (2b) of the axle (2), leaving no gap therebetween, and the bearing negative gap is secured.