Screw clamping device

Patent metadata

Field	Value
Publication number	US-10906162-B2
Application number	US-201815874073-A
Country	US
Kind code	B2
Filing date	Jan 18, 2018
Priority date	Oct 6, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A screw clamping device includes a body, a pressing unit, a resilient unit, a clamping unit and a connecting unit. The body is a hollow-core cylinder, is subject to axial penetration of a screwdriver, and is movable axially in synchrony with rotation of the screwdriver. The pressing unit is disposed on the body and adapted to press against a surface of a working object. The resilient unit is disposed between the body and the pressing unit. The clamping unit is rotatably connected to the body. The connecting unit has one end connected to the pressing unit and the other end connected to the clamping unit. While the body is moving axially, the connecting unit drives the clamping unit to rotate and thereby clamp or loosen screws.

First claim

What is claimed is:

1. A screw clamping device, comprising:
a body including a head part and a hollow-core cylinder, wherein the head part is disposed at a first end of the cylinder, the head part has a diameter larger than a diameter of the cylinder, the head part comprises a plurality of dents, and the cylinder has an axial direction for a screwdriver to be fixed along the axial direction;
a pressing unit comprising a sleeve portion and a pressing portion, wherein the sleeve portion is sleeved on the cylinder, the pressing portion is connected to the sleeve portion and is received in at least one of said plurality of dents to press against a surface of a working object;
a resilient unit disposed on the cylinder, one end of the resilient unit pressing against the sleeve portion and the other end of the resilient unit pressing against the head part, wherein the head part is separated from the sleeve portion;
at least two clamping units, each comprising a clamping arm and a C-shaped clamping portion, wherein each of the clamping arms is pivotally connected to a respective dent of said plurality of dents different from the dent receiving the pressing portion, each of the C-shaped clamping portions is connected to an end of a respective clamping arm of said clamping arms; and
at least two connecting units, wherein each connecting unit comprises an elongated connecting arm, one end of each of the elongated connecting arms is connected to the sleeve portion, and the other end of each of the elongated connecting arms is connected to a respective one of the clamping arms.

2. The screw clamping device of claim 1 , wherein an end of the pressing portion comprises an L-shaped arm, the surface of the working object is pressed against the bottom of the L-shaped arm.

3. The screw clamping device of claim 1 , wherein the body comprises an inner wall, such that the screwdriver is in contact with the inner wall for fixing the body.

4. The screw clamping device of claim 1 , wherein the clamping arms are symmetrically arranged, wherein the C-shaped clamping portions an obliquely in opposite directions.

5. A screw clamping device, comprising:
a body including a head part and a hollow-core cylinder, wherein the head part is disposed at a first end of the cylinder, the head part has a diameter larger than a diameter of the cylinder, the head part comprises a plurality of dents, and the cylinder has an axial direction for a screwdriver to pass along the axial direction;
a fixing unit disposed on the second end of the cylinder and fixed with the screwdriver, the fixing unit being driven for pressing against the body moved along the axial direction when the screwdriver is rotating;
a pressing unit comprising a sleeve portion and a pressing portion, wherein the sleeve portion is sleeved on the cylinder, the pressing portion is connected to the sleeve portion and is received in at least one of said plurality of dents to press against a surface of a working object;
a resilient unit disposed on the cylinder, one end of the resilient unit pressing against the sleeve portion and the other end of the resilient unit pressing against the head part, wherein the head part is separated from the sleeve portion;
at least two clamping units, each comprising a clamping arm and a C-shaped clamping portion, wherein each of the clamping arms is pivotally connected to a respective dent of said plurality of dents different from the dent receiving the pressing portion, each of the C-shaped clamping portions is connected to an end of a respective clamping arm of said clamping arms; and
at least two connecting units, wherein each connecting unit comprises an elongated connecting arm, one end of each of the elongated connecting arms is connected to the sleeve portion, and the other end of each of the elongated connecting arms is connected to a respective one of the clamping arms.

6. The screw clamping device of claim 5 , wherein an end of the pressing portion comprises an L-shaped arm, the surface of the working object is pressed against the bottom of the L-shaped arm.

7. The screw clamping device of claim 5 , wherein the fixing unit comprises a plurality of screws penetratingly disposed perpendicular to the axial direction to press against the screwdriver.

8. The screw clamping device of claim 5 , wherein the clamping arms are symmetrically arranged, with two said C-shaped objects formed at two said clamping arms, respectively, wherein the C-shaped clamping portions are obliquely in opposite directions.

Assignees

• Nat Chung Shan Inst Science & Tech

Inventors

• Chang Han-Hsiang
• Liu Kui-Chin
• Lin Yung-Lin

Classifications

• B25B23/10

  using mechanical gripping means · CPC title

• B25B23/101 Primary

  for hand-driven screw-drivers (B25B23/105 takes precedence) · CPC title

• B25B15/02

  operated by rotating the handle · CPC title