| 摘要 |
An oil brake driving device is used as a primary or a secondary part of an oil brake, comprising a main body, having a front end with an enclosed space and a rear end with a rear opening which is connected with the enclosed space; an expansion piece, placed in the enclosed space and having a pressure chamber and an opening; a connecting head, having a channel and a front end that is connected with the opening of the expansion piece and being fastened on the rear opening of the main body; and a piston on a front side of the expansion piece; wherein, when used as a primary part of an oil brake, for braking the piston is pushed rearward, generating oil pressure in the pressure chamber, which is transmitted through the connecting head and a conduit, and when used as a secondary part of an oil brake, oil pressure is by the conduit and the connecting head transmitted into the pressure chamber, causing the expansion piece to expand and the piston to be pushed forward.
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