Positioning structure of negative-pressure adsorption-type wall-surface mobile robot centrifugal impeller

Abstract

The invention relates to a positioning structure of a negative-pressure adsorption-type wall-surface mobile robot centrifugal impeller. The positioning structure comprises an impeller laminating tray, an impeller air inlet positioning piece and an impeller shaft, wherein the impeller laminating tray is fixed on the outer wall of a robot seal cavity; the impeller air inlet positioning piece is fixedly connected with the inner circle of the laminating tray and provided with an inner ring; the impeller shaft penetrates through the centrifugal impeller and the inner ring of the impeller air inlet positioning piece; the impeller shaft is connected with a driving gear through a spline on the top end of the impeller shaft and drives the impeller to rotate through a keyway and a key corresponding to the centrifugal impeller; the upper end and the lower end of the impeller shaft are respectively connected with an upper end sleeve and a lower end sleeve through bearings; the central hole in an impeller housing is sleeved outside the upper end sleeve; the lower end sleeve is connected with the inner ring of the impeller air inlet positioning piece through a screw thread; the exterior of each sleeve is provided with screw threads; and when the nut is screwed, the sleeves can drive the impeller shaft to move up and down within a narrow range, thereby realizing the fine adjustment of the gap between the impeller and the laminating tray. By using the positioning structure, the impeller does not need to be fixed to the motor shaft, thereby solving the problem of the connection between the impeller and the seal cavity.

Description

technical field [0001] The invention relates to a positioning structure, in particular to a positioning structure for a centrifugal impeller of a negative pressure adsorption type wall surface mobile robot. Background technique [0002] The low-noise miniature wall mobile robot is a kind of robot that can replace human beings in the dangerous and difficult-to-reach vertical wall environment. At present, the most popular adsorption principle of the wall mobile robot is the negative pressure (vacuum) adsorption principle, that is, through the rotation of the impeller, a negative pressure is formed inside the sealed cavity, so that the robot is adsorbed on the wall. The positioning of the impeller on the robot cavity is always the focus and difficulty in the structural design of this type of robot. Since the impeller hangs on the top of the sealing chamber, it is always a difficult problem to connect the impeller to the sealing chamber under the condition that the rotation is ...

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Problems solved by technology

However, if the center hole of the impeller is connected to the motor shaft, the rotation axis of the impeller and the rotation plane cannot be guaranteed to be vertical when the motor is fixed, and the motor cannot be kept stable during rotation, which will cause serious friction, so that the wall mobile robot cannot work normally.

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