A linear motion bearing assembly comprising a load bearing plate structure having at least a portion of a plurality of open axial ball tracks formed therein, each of said plurality of open axial ball tracks comprised of at least two concentric ball tracks. The ball tracks including an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. At lease one load bearing plate is axially positioned adjacent said load bearing plate structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. Various outer housing sleeves are disclosed including a structure split axially and a monolithic structure.

The present application relates to a field of bearing technology and relates to a recirculating roller bearing, including a front cover plate, a rear cover plate, an inner supporter, a sealing covering and a plurality of rolling carriers and at least one connector, in which the front cover plate and the rear cover plate are detachable connected on two sides of the inner supporter respectively; a circulating guiding path is defined by the front cover plate, the rear cover plate, the inner supporter and the sealing covering, the circulating guiding path includes a sealing portion and an opened load-bearing portion; the rolling carriers are filled in the circulating guiding path, each of the rolling carriers forms a rolling fit with the inner supporter, and each of the rolling carrier forms a rolling fit with a retractable fork when passing the opened load-bearing portion of the circulating guiding path.

This rolling device 10 includes an inner member 11 provided with a rolling element rolling groove 11a, and an outer member 21 attached to the inner member 11 to be relatively movable via a plurality of roiling elements 12. The outer member 21 includes an outer member main body portion 22 including a loaded rolling element rolling groove 25 forming a loaded rolling element rolling raceway in cooperation with the rolling element rolling groove 11a and a non-loaded rolling element rolling raceway 33 arranged to correspond to the loaded rolling element rolling groove 25, and a pair of lids 24 attached to both end surfaces of the outer member main body portion 22 in a relatively-moving direction and having at least a part of a direction changing raceway 35 connecting one end of the loaded rolling element rolling raceway to one end of the non-loaded rolling element rolling raceway 33. Each of the lids 24 is provided with a projection portion 24b including at least the part of the direction changing raceway 35. Also, the projection portion 24b is provided with a lubricant supply path 38. With this configuration, this rolling device 10 can circulate the plurality of rolling elements smoothly in an endless circulation raceway.

The present application relates to a combined guide rail mechanism and its use in a vehicle slide-out system, which includes a guide rail, a first guide, and a second guide. The guide rails contain multiple parallel rows of circulating balls, enabling the combined guide rail mechanism to achieve two-stage telescopic linear motion. A vehicle box slide-out system comprises the combined guide rail mechanism, a driving device, a support frame, a bearing box, and a slide-out box. This application achieves a two-stage extension, increases the usable space of the vehicle, and has an integrated mechanism setup that does not require disassembly of the vehicle's chassis. It is easy to install, needing only the slide-out box to be placed at the vehicle's opening, which is neat and aesthetically pleasing.