Adjustment mechanism and lifting device having the adjustment mechanism

Patent metadata

Field	Value
Publication number	US-10107448-B1
Application number	US-201815942645-A
Country	US
Kind code	B1
Filing date	Apr 2, 2018
Priority date	Jul 6, 2017
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An adjustment mechanism is configured to be disposed between inner and outer tubes of a lifting device, and includes two angularly space-apart abutment modules configured to be disposed on an inner wall surface of the outer tube and each of which has an abutment unit configured to abut against an outer wall surface of the inner tube, and an adjustment module including an adjustment seat, and a pressing unit and a drive member both disposed on the adjustment seat. The drive member is operable to drive movement of the adjustment seat relative to the outer tube so as to push the pressing unit against the outer wall surface of the inner tube to thereby abut the outer wall surface of the inner tube against the abutment units of the abutment modules.

First claim

What is claimed is:

1. An adjustment mechanism of a lifting device which includes an outer tube and an inner tube movably inserted into the outer tube, said adjustment mechanism being configured to be disposed between the inner and outer tubes and comprising:
two angularly space-apart abutment modules configured to be disposed on an inner wall surface of the outer tube, each of said abutment modules including an abutment unit configured to abut against an outer wall surface of the inner tube; and
an adjustment module configured to be disposed on the inner wall surface of the outer tube angularly spaced apart from said abutment modules and including an adjustment seat, and a pressing unit and a drive member both disposed on said adjustment seat, said drive member being operable to drive movement of said adjustment seat relative to the outer tube so as to push said pressing unit against the outer wall surface of the inner tube to thereby abut the outer wall surface of the inner tube against said abutment units of said abutment modules.

2. The adjustment mechanism as claimed in claim 1 , wherein said adjustment module further includes a base seat and a shaft, said base seat including two opposite side walls, said adjustment seat being disposed between said side walls, each of said side walls having an inclined through slot, said shaft extending through said adjustment seat and having two opposite ends received slidably and respectively in said inclined through slots of said side walls.

3. The adjustment mechanism as claimed in claim 1 , wherein said adjustment module further includes a base seat, said base seat including a base wall configured to be fixed on the inner wall surface of the outer tube and having at least one inclined surface configured to face the inner tube, said adjustment seat having at least one inclined surface slidably abutting against said at least one inclined surface of said base wall.

4. The adjustment mechanism as claimed in claim 3 , each of the inner and outer tubes extends along a longitudinal direction (I), wherein said adjustment seat extends along a longitudinal direction (B) parallel to the longitudinal direction (I), and further has a threaded hole extending along the longitudinal direction (B), said drive member having an external thread threadedly engaged with said threaded hole.

5. The adjustment mechanism as claimed in claim 1 , wherein said pressing unit includes a plurality of rollers rotatably disposed on said adjustment seat and partially protruding out of said adjustment seat for abutment with the outer wall surface of the inner tube.

6. The adjustment mechanism as claimed in claim 5 , wherein said adjustment module further includes a plurality of shafts each of which extends through a respective one of said rollers and each of which has a knurled surface at one end thereof fixed to said adjustment seat.

7. The adjustment mechanism as claimed in claim 1 , wherein said pressing unit includes a plurality of balls rotatably disposed on said adjustment seat and partially protruding out of said adjustment seat for abutment with the outer wall surface of the inner tube.

8. The adjustment mechanism as claimed in claim 1 , wherein said pressing unit includes a plurality of pin rollers rotatably disposed on said adjustment seat and partially protruding out of said adjustment seat for abutment with the outer wall surface of the inner tube.

9. The adjustment mechanism as claimed in claim 1 , wherein said pressing unit includes a slide plate fixed on said adjustment seat and partially protruding out of said adjustment seat for abutment with the outer wall surface of the inner tube.

10. The adjustment mechanism as claimed in claim 1 , wherein said abutment unit of each of said abutment modules includes a plurality of rollers.

11. The adjustment mechanism as claimed in claim 1 , wherein said abutment unit of each of said abutment modules includes a plurality of balls.

12. The adjustment mechanism as claimed in claim 1 , wherein said abutment unit of each of said abutment modules includes a slide plate.

13. The adjustment mechanism as claimed in claim 1 , wherein said abutment unit of each of said abutment modules includes a plurality of pin rollers.

14. A lifting device comprising:
an outer tube;
an inner tube movably inserted into said outer tube; and
an adjustment mechanism disposed between said inner and outer tubes and including
two angularly space-apart abutment modules disposed on an inner wall surface of said outer tube, each of said abutment modules including an abutment unit abuttable against an outer wall surface of said inner tube, and
an adjustment module disposed on said inner wall surface of said outer tube angularly spaced apart from said abutment modules and including an adjustment seat, and a pressing unit and a drive member both disposed on said adjustment seat, said drive member being operable to drive movement of said adjustment seat relative to said outer tube so as to push said pressing unit against said outer wall surface of said inner tube to thereby abut said outer wall surface of said inner tube against said abutment units of said abutment modules.

Assignees

• Modernsolid Ind Co Ltd

Inventors

• Hung Chin-Jui

Classifications

• A47B2200/0052

  with two telescopic parts · CPC title

• F16M11/26 Primary

  by telescoping, with or without folding (details concerning the constructional features of telescoping parts only F16B7/10) · CPC title

• F16M11/28

  Undercarriages for supports with one single telescoping pillar · CPC title

• A47C3/20

  Chairs or stools with vertically-adjustable seats · CPC title

• A47B9/20 Primary

  Telescopic guides · CPC title