US 2022/0178428 A1Published application

Ball screw assembly and open nut thereof

OwnerSzu-Ying Leeinventor

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Abstract

An open nut and a ball screw assembly having the open nut are provided. The ball screw assembly includes a guider, an open nut, and a ball circulating assembly. The open nut includes an axial cylinder, an open shield, and two circulators. The two circulators are respectively disposed on a first axial wall and a second axial wall of the axial cylinder with an axial opening. Each of the circulators includes an inner member and an outer member. The inner member and the outer member are assembled to each other and are respectively in communication with an inner ball race between the guider and the open nut and an outer ball race of the open nut. Therefore, the inner ball race, ball races of the two circulators, and the outer ball race form a ball circulating race, and the ball circulating assembly rolls in the ball circulating race.

Claims16

Dependent claims

A ball screw assembly, comprising:

a guider having a central axis and a spiral channel, wherein the spiral channel is disposed around an outer periphery of the guider;
an open nut comprising:
an axial cylinder having an axial opening, wherein the axial cylinder has a first axial wall and a second axial wall on two opposite sides of the axial opening, and the axial cylinder comprises an inner circular wall and an outer circular wall, wherein the inner circular wall has an inner spiral channel, wherein the inner spiral channel and the spiral channel of the guider correspond to each other and form an inner ball race;
an open shield coaxially fitted over an outer periphery of the axial cylinder, wherein the open shield has an inner peripheral wall, wherein the inner peripheral wall and the outer circular wall of the axial cylinder correspond to each other and form an outer ball race;
and
two circulators respectively disposed on the first axial wall and the second axial wall, wherein each of the circulators comprises:
an inner member comprising a main body, a plurality of through holes, and a plurality of through slots, wherein the through holes and the through slots are disposed in the main body, the through holes and the through slots are disposed in a one-to-one correspondence, and the through slots are provided on a long side of the main body;
and
an outer member assembled to the inner member correspondingly, wherein the outer member comprises a plurality of arc-shaped sliding grooves, wherein a first end of each of the arc-shaped sliding grooves corresponds to the corresponding through hole, a second end at an opposite side of each of the arc-shaped sliding grooves corresponds to the corresponding through slot, and wherein the inner member and the outer member form a ball race after the inner member and the outer member are combined with each other;
and
a ball circulating assembly comprising a plurality of balls, wherein the inner ball race, the ball races of the two circulators, and the outer ball race form a ball circulating race, wherein the ball circulating assembly rolls in the ball circulating race.

8 more elements

An open nut, comprising:

an axial cylinder having an axial opening, wherein the axial cylinder has a first axial wall and a second axial wall on two opposite sides of the axial opening, and the axial cylinder comprises an inner circular wall and an outer circular wall, wherein the inner circular wall has a plurality of inner spiral channels;
an open shield coaxially fitted over an outer periphery of the axial cylinder, wherein the open shield has an inner peripheral wall, wherein the inner peripheral wall and the outer circular wall of the axial cylinder correspond to each other and form an outer ball race;
and
two circulators respectively disposed on the first axial wall and the second axial wall, wherein each of the circulators comprises:
an inner member comprising a main body, a plurality of through holes, and a plurality of through slots, wherein the through holes and the through slots are disposed in the main body, the through holes and the through slots are disposed in a one-to-one correspondence, and the through slots are provided on a long side of the main body;
and
an outer member assembled to the inner member correspondingly, wherein the outer member comprises a plurality of arc-shaped sliding grooves, wherein a first end of each of the arc-shaped sliding grooves corresponds to the corresponding through hole, a second end at an opposite side of each of the arc-shaped sliding grooves corresponds to the corresponding through slot, and wherein the inner member and the outer member form a ball race after the inner member and the outer member are combined with each other;
wherein one end of each of the through holes of the inner member away from the outer member corresponds to the outer ball race, the through slots of the inner member and the arc-shaped sliding grooves of the outer member are respectively in communication with the inner spiral channels, and one of the inner spiral channels, the ball races of the two circulators, and the outer ball race form a ball circulating race.

5 more elements

Dependencies are inferred from the claim text.