| 摘要 |
<p>This invention relates to a disc or drum grinding apparatus 4 for use in in situ grinding of a brake disc 1 or drum on a wheel hub 2 on a vehicle 3. The apparatus 4 is securely mountable on the hub 2 so as to be supported substantially wholly by the hub 2 and connected substantially rigidly thereto. A first drive transmission means 9,10,12,13 is drivingly engaged with at least one of said disc 1 or drum and hub 2 for rotating said disc 1 or drum about the hub axis, the apparatus 4 being provided with a stop means 15 for engagement with a fixed body 17 so as to prevent rotation of the apparatus 4 with the disc 1 or drum. A second drive transmission means 23,24 is arranged for driving a grinding wheel 25 disposal in contact with the brake disc 1 or drum for grinding a braking surface 29,30 thereof. At least one motor 8,22 is provided for driving said first and second drive transmission means The invention also provides a method of grinding a brake disc 1 or drum comprising the steps of removing a wheel from the hub 2, attaching a grinding apparatus 4 of the invention to the hub 2 so as to support the apparatus 4 wholly on the hub 2 in rigid connection therewith, operating the first drive transmission means 9,10,12,13 to rotate the hub 2 and disc 1 or drum, operating the second drive transmission means 23,24 and bring the grinding means 25 into engagement with the disc 1.</p> |
