Grinding wheel replacement safety structure for handheld grinding wheel device

• US 20020123301A1
• Filed: 03/01/2001
• Published: 09/05/2002
• Est. Priority Date: 12/26/2000
• Status: Active Grant

• Current Assignee: Mobiletron Electronics Co. Ltd.
• Original Assignee: Mobiletron Electronics Co. Ltd.
• Inventors: Chi, Wen Yao
• Granted Patent: US 6,511,369 B2
• Time in Patent Office: Days
• US Class Current: 451/344
• CPC Class Codes: B24B 23/02 with rotating grinding tools; Accessories therefor
• CPC Class Codes: B24B 23/022 Spindle-locking devices, e.g. for mounting or removing the tool
• CPC Class Codes: B24B 45/00 Means for securing grinding wheels on rotary arbors suppression of vibrations in systems F16F15/00; testing static or dynamic balancing of machines G01M1/00

Abstract

A grinding wheel replacement safety structure for handheld grinding wheel device is located between a transmission grinding wheel fitting end and an actuating push button, and includes a safety button, a stop in, a limit actuating link, a link spring, and a stop in spring. The safety button is located above an umbrella-shaped gear of the fitting end and has a button face projecting from a grinding wheel housing. The stop pin extends vertically across a rear end of the button face proximate to a hub of the gear. The limit actuating link extends transversely across an offset surrounding wall of the safety button proximate to the actuating push button. The link spring is fitted over the limit actuating link and the stop pin spring is fitted over a neck portion of the stop pin to respectively abut against the inner wall of the housing. When the safety button is turned, the stop pin is retained on the hub of the gear, while the limit actuating link abuts against the actuating push button to lock the fitting end and stop movement of the actuating push button, thereby facilitating replacement of the grinding wheel and ensuring safety.

Claims

1. A grinding wheel replacement safety structure for handheld grinding wheel device located between a transmission grinding wheel fitting end and an actuating push button, comprising a safety button, a stop in, a limit actuating link, a link spring, and a stop in spring, wherein said safety button is located above an umbrella-shaped gear of said fitting end and has a button face projecting from a grinding wheel housing, said stop pin extending vertically across a rear end of said button face proximate to a hub of said gear, said limit actuating link extending transversely across an offset surrounding wall of said safety button proximate to said actuating push button, said link spring being fitted over said limit actuating link and said stop pin spring being fitted over a neck portion of said stop pin to respectively abut against the inner wall of said housing, whereby when said safety button is turned, said stop pin is retained on said hub of said gear, while said limit actuating link abuts against said actuating push button to lock said fitting end and stop movement of said actuating push button.

2. The grinding wheel replacement safety structure for handheld grinding wheel of claim 1, wherein said hub of said gear is provided with a plurality of retaining grooves for receiving and retaining said stop pin.

3. The grinding wheel replacement safety structure for handheld grinding wheel of claim 1, wherein the surrounding of said rear end of said button face is formed as an inverted oblique face.