Rotary support including bearings

1. A rotary support, comprising:

a bearing inner race;

a bearing outer race including a plurality of axially disposed through holes;

a first plurality of rolling elements installed between the bearing inner race and the bearing outer race, and arranged to retain the bearing inner race and the bearing outer race in rolling engagement; and

an outer ring radially surrounding and fixed to an outer portion of the bearing inner race and disposed axially opposite to the bearing outer race; wherein the outer ring includes a plurality of axially penetrated mounting holes; wherein the bearing outer race through holes are axially aligned with the outer ring mounting holes; and

a screw race disposed between the bearing inner race and the bearing outer race; wherein the screw race radially surrounds the bearing inner race and is in threaded connection with the bearing inner race.

2. The rotary support of claim 1 , wherein an annular groove is disposed in an end of the bearing outer race axially opposite to the outer ring, and a radial width of the annular groove is greater than a diameter of the mounting holes.

3. The rotary support of claim 1 further comprising a second plurality of rolling elements installed between the screw race and the outer race and arranged for rolling engagement between the screw race and the outer race.

4. The rotary support of claim 3 , wherein an annular groove is disposed in an end of the bearing outer race axially opposite to the outer ring, and a radial width of the annular groove is greater than a diameter of the mounting holes.

5. The rotary support of claim 1 , wherein an inner diameter of the bearing inner race gradually increases in axial direction pointing from the bearing outer race to the outer ring.

6. A rotary support, comprising:

a bearing inner race,

a bearing outer race, and

a plurality of rolling elements installed between the bearing inner race and the bearing outer race and arranged to retain the bearing inner race and the bearing outer race in rolling engagement;

a first mounting surface, wherein the bearing inner race includes at least two mounting holes for mounting the first mounting surface, and

a second mounting surface, wherein the bearing outer race includes at least two threaded holes for mounting the second mounting surface; and,

wherein the bearing outer race further includes at least two through holes axially aligned with the mounting holes, so that the bearing inner race is fixedly connected to the first mounting surface in a direction pointing from the bearing inner race to the first mounting surface;

wherein the bearing inner race comprises a main body and an outer ring surrounding the main body in a radial direction and connected to the main body, wherein the outer ring is axially opposite to the bearing outer race, and the at least two mounting holes are disposed in the outer ring and are axially penetrated.

7. The rotary support of claim 6 , wherein an annular groove s disposed in an end of the bearing outer race axially opposite to the outer ring, and a radial width of the annular groove is greater than a diameter of the mounting holes.

8. The rotary support of claim 6 further comprising a screw race disposed between the bearing inner race and the bearing outer race; wherein the screw race radially surrounds the bearing inner race and is in threaded connection with the bearing inner race.

9. The rotary support of claim 8 further comprising a second plurality of rolling elements installed between the screw race and the outer race and arranged for rolling engagement between the screw race and the outer race.

10. The rotary support of claim 6 , wherein an inner diameter of the bearing inner race gradually increases in axial direction pointing from the bearing outer race to the outer ring.