초록 ▼

A retractable antifriction bearing device (10a) that can be housed in a standardized groove of a loading bed. Each ball (30) is mounted directly in a housing (21a) of the profile (20a) by a guide and sealing ring (50) provided with a spherical cavity (53) that complements the ball (30) to hold the b

A retractable antifriction bearing device (10a) that can be housed in a standardized groove of a loading bed. Each ball (30) is mounted directly in a housing (21a) of the profile (20a) by a guide and sealing ring (50) provided with a spherical cavity (53) that complements the ball (30) to hold the ball in position with respect to the housing (21a). A bearing guide (60a) is also mounted directly in the housing (21a) and is provided with a cup (61) guiding the ball (30) in rotation via a bed of small balls (62). This bearing guide (60a) is spring-loaded by spring elements (40a) so as to urge the ball (30) into the working position in which the ball bears the load (2).

대표청구항 ▼

The invention claimed is: 1. A retractable bearing device (10a-c) for a loading bed (1) to facilitate at least one of displacement and positioning of heavy loads (2) in a transfer plane (T), extending parallel to the loading bed (1), the bearing device comprising:a profile (20a-c) equipped with ball

The invention claimed is: 1. A retractable bearing device (10a-c) for a loading bed (1) to facilitate at least one of displacement and positioning of heavy loads (2) in a transfer plane (T), extending parallel to the loading bed (1), the bearing device comprising:a profile (20a-c) equipped with balls (30) and displacement means (40a-c) for displacing the balls (30) between a working position, in which the balls (30) project from the profile to support the load (2), and a resting position, in which the balls (30) are retracted within the profile and do not support the load (2),each ball (30) being attached to a housing (21a-c) in the profile (20a-c) by a guide and sealing ring (50) having a spherical cavity (53) that captively mates with an exterior surface of the ball (30) and covering an area that extends from either side of a median transverse plane of the ball (30) to captively retain and maintain the respective ball (30) in position relative to the housing (21a-c), andthe guide and sealing ring (50) comprises a means for forming a seal between both the ball (30) and the housing (21a-c) and moving along with the ball (30) when the ball (30) moves to and fro between the working position and the resting position.