Retainer and chain-type ball retaining device

Abstract

A chain-type ball retaining device comprises multiple balls and a retainer. The retainer comprises two connecting pieces and multiple distance pieces. The connecting pieces are arranged at two sides of the balls. Head and tail of each connecting piece both have an adjoining plane. The adjoining planes of the connecting pieces overlap in the arrangement direction of the balls and are joined seamlessly. The distance pieces are arranged at intervals along the arrangement direction between the connecting pieces. A ball is arranged between each two distance pieces. By overlapping head and tail of the retainer in the arrangement direction of the balls and seamlessly joining at the overlapping position, head and tail of the retainer can be bonded greatly and can present a corresponding arc shape with the arc of a ball track in operation. Thus, problems such as friction, noise and the like which are caused by deflection of the connecting pieces during operation can be solved.

Description

technical field [0001] The invention relates to a retainer and a retaining device, in particular to a retainer and a chain-type ball retaining device applied to a chain-type ball retaining device. Background technique [0002] refer to figure 1 , figure 2 and image 3 The chain-type ball retaining device is one of the important components of the current linear slide rail. Through the circular movement of the ball 11 and the retainer 12 in the chain-type ball retaining device between the cylindrical raceways 19, the linear slide can be rail for low friction and smooth glide. [0003] The cage 12 generally includes two connecting pieces 121 arranged on both sides of the ball 11, and a plurality of spacers 122 for separating the balls 11. The cage 12 is generally as follows: figure 1 unconnected style as shown, or as in figure 2 , image 3 Shown is the style of pivoting through the connecting piece 121 from head to tail. [0004] However, since the raceway 19 is a circ...

AI Technical Summary

Problems solved by technology

[0004] However, since the raceway 19 is a circulation pipeline, it generally has two straight pipe portions 191 in the shape of straight pipes, and two return pipe portions 192 respectively connected to the straight pipe portions 191 and in the shape of curved pipes. The raceway 19 is a cylindrical pipe, so when the head and tail ends of the retainer 12 run to the return pipe portion 192 in a bent tubular shape, the connecting piece 121 will deflect outward due to its own elastic straightening. The position of connector 121 meets the figure 1 , image 3 When any of the two imaginary lines in the middle, it means that the connecting piece 121 has contacted and rubbed against the wall surface of the return pipe part 192, so that the frictional resistance of the retainer 12 during operation will increase, making the rolling unsmooth, and There will be problems such as noise during operation due to friction

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