Support mechanism

Patent metadata

Field	Value
Publication number	US-11446807-B2
Application number	US-201916580340-A
Country	US
Kind code	B2
Filing date	Sep 24, 2019
Priority date	Jul 29, 2019
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

A support mechanism includes a fixed body, a rotating unit, a moving unit and a driving unit. The rotating unit is rotationally mounted to the fixed body. The moving unit, disposed at the fixed body, includes a ball screw spline shaft, a ball screw nut and a ball spline nut. The ball screw nut and the ball spline nut are both rotatably disposed at the ball screw spline shaft moved together with the rotating unit. The driving unit, disposed at the fixed body, includes a first driving member and a second driving member to rotate the ball screw nut and the ball spline nut, respectively. With different rotation pairs of the ball screw nut and the ball spline nut to the ball screw spline shaft, the ball screw spline shaft is driven to move, and the ball screw spline shaft is further to move the rotating unit.

First claim

What is claimed is:

1. A support mechanism, comprising:
a fixed body member;
a rotating unit, mounted to the fixed body member, used for rotating with respect to the fixed body member;
a moving unit, disposed at the fixed body member, including a ball screw spline shaft, a ball screw nut and a ball spline nut, the ball screw nut being rotatably disposed at the ball screw spline shaft, the ball spline nut being rotatably disposed also at the ball screw spline shaft, the ball screw spline shaft being moved together with the rotating unit; and
a driving unit, disposed at the fixed body member, including a first driving member and a second driving member, the first driving member being to rotate the ball screw nut, the second driving member being to rotate the ball spline nut;
wherein, with different rotation pairs of the ball screw nut and the ball spline nut to the ball screw spline shaft, the ball screw spline shaft is driven to correspondingly move, and the ball screw spline shaft is further driven to move the rotating unit;
wherein the fixed body member includes a first bevel gear, and the rotating unit includes a second bevel gear; wherein, when the rotating unit rotates axially about the ball screw spline shaft, a rotation angle of the rotating unit with respect to the fixed body member is adjusted through meshing between the first bevel gear and the second bevel gear.

2. The support mechanism of claim 1 , wherein the first bevel gear is fixed to the fixed body member, the rotating unit includes a main body, a supportive base and a rotational shaft, one end of the ball screw spline shaft connects the supportive base, the rotational shaft penetrates the supportive base, an axial direction of the rotational shaft is perpendicular to another axial direction of the ball screw spline shaft, the main body connects the rotational shaft, and one end of the rotational shaft penetrates the second bevel gear.

3. The support mechanism of claim 2 , further including a brake element connected with another end of the rotational shaft, the brake element being used for fixing the rotational shaft so as to provide the rotating unit the rotation angle with respect to the fixed body member.

4. The support mechanism of claim 2 , further including a supportive element connected with the main body, the supportive element being one of a suction cup, an electromagnetic valve and a claw.

5. The support mechanism of claim 1 , further including a detecting element connected with the fixed body member, the detecting element being used for determining whether or not the first bevel gear is meshed with the second bevel gear.

6. The support mechanism of claim 1 , wherein the ball screw spline shaft has an axial direction parallel to another axial direction of the driving unit.

7. The support mechanism of claim 1 , wherein the driving unit includes a first transmission element and a second transmission element, the first driving member includes a first shaft portion, the second driving member includes a second shaft portion, the first transmission element connects the first shaft portion and the ball screw nut, and the second transmission element connects the second shaft portion and the ball spline nut.

8. The support mechanism of claim 7 , wherein the first transmission element is a combination of belts and pulleys, and the second transmission element is another combination of belts and pulleys.

9. The support mechanism of claim 7 , wherein an axial direction of the first shaft portion is parallel to another axial direction of the ball screw spline shaft, and a further axial direction of the second shaft portion is parallel to the another axial direction of the ball screw spline shaft.

10. The support mechanism of claim 1 , wherein each different rotation pair specifies different combinations of driving, rotation directions and rotation speeds for the ball screw nut and the ball spline nut.

11. The support mechanism of claim 1 , wherein the moving unit includes a screw nut fixation base fixed to the fixed body member, the screw nut fixation base is fixed to corresponding flanges of the ball screw nut and the ball spline nut, and the ball screw spline shaft is movably mounted inside the screw nut fixation base.

12. The support mechanism of claim 1 , wherein the ball screw nut rotates about the ball screw spline shaft via a first bearing element, and the ball spline nut rotates about the ball screw spline shaft via a second bearing element.

13. The support mechanism of claim 1 , wherein the ball screw spline shaft includes a spiral groove and a linear groove, the ball screw nut rotates along the linear groove, and the ball spline nut rotates along the spiral groove.

Assignees

• Ind Tech Res Inst

Inventors

• Jhang Bo-Jyun
• Lin Wei-Juh
• Lin Wei-Tse
• Chen Pei-Yin
• Liao Chien-Chih
• Chen Chun-Ting

Classifications

• F16M13/022

  repositionable · CPC title

• F16M11/041

  Allowing quick release of the apparatus · CPC title

• B23Q1/26 Primary

  characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members {(bearings for linearly moving parts F16C29/00)} · CPC title

• B25H1/16 Primary

  in height · CPC title

• F16M11/28

  Undercarriages for supports with one single telescoping pillar · CPC title