US 7,458,278 B1Granted

Torsion detecting mechanism for a pneumatic tool

AssigneePneutech Manufacture Co., Ltd.

InventorTsun-Tien Lin

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Abstract

A torsion detecting mechanism for a pneumatic tool is a torque detecting mechanism which comprises a rack, a driving device, a buffer device, a sensing member and a pressure relieving device. The rack is provided for mounting the driving device, the buffer device, the sensing member, and the pressure relieving device. A pneumatic tool drives the driving device to rotate, such that the buffer device is pressed against the sensing member to obtain the test data, such as the torque of the pneumatic tool. After the test is finished, the pressure relieving device will relieve the oil pressure of the buffer device, enabling the driving device to be immediately returned to the state of waiting for the next test. Thereby, such arrangements not only provide a stable test, an accurate test data, and a high test safety, but also can wide the industrial application.

Claims7

Dependent claims

A torsion detecting mechanism for a pneumatic tool, comprising:

a driving device including a rotating member, the pneumatic tool being rotatably inserted in one end of the rotating member, the other end of the rotating member having a drive portion with an arc-shaped height difference, one end of a driven member being formed with a driven portion opposite to the drive portion, the driven portion having an arc-shaped height difference corresponding to the drive portion, the driven member being moved axially without rotating, the other end of the driven member being formed with a pushing portion, and a restoration member, both ends of the restoration member being fixed to the rotating member and the driven member, respectively;
a buffer device including a buffer containing member for containing the pushing portion, the pushing portion being used to push a medium disposed between the pushing portion and an abutting member of the buffer containing member, the abutting member being formed with a pushed portion and an abutting portion, the pushed portion being pushed by the medium;
a sensing member disposed close to the abutting portion of the abutting member of the buffer device;
a pressure relieving device including a return pipe, one end of the return pipe being connected to the medium of the buffer containing member of the buffer device, and the other end of the return pipe being connected to a pressure relieving valve body.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/868,511Filed 7 Oct 2007
Granted: 2 Dec 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01N 3/22
Investigating strength properties of solid materials by application of mechanical stress: by applying steady torsional forces
G01L 5/24
Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes: for determining value…
G01N
Investigating or analysing materials by determining their chemical or physical properties
G01L
Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure