| abstract |
The utility model discloses a surveying instrument with a rotary braking device, which comprises a base and a rotating part, wherein the rotating part is rotatably arranged on the base around a rotating center line; when the rotation braking device is in a release state, the electromagnet is separated from the armature, and the electromagnet and the armature are arranged with a gap. This surveying instrument with rotatory arresting gear, the braking is reliable and stable, and inner structure simplifies, and assembly process is simple, has reduced installation and maintenance cost, has improved surveying instrument's life to its rotatory arresting gear can realize stopping totally or incompletely and stop dead different demands. |